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Canon NP7161 manual

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Table of contents for the manual

  • Page 1

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) FY8-13FB-000 AUG. 1998 SERVICE MANUAL REVISION 0[...]

  • Page 2

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) IMPORTANT THIS DOCUMENTATION IS PUBLISHED BY CANON INC., JAPAN, TO SERVE AS A SOURCE OF REFERENCE FOR WORK IN THE FIELD. SPECIFICATIONS AND OTHER INFORMATION CONTAINED HEREIN MAY VARY SLIGHTLY FROM ACTUAL MACHINE VALUES OR THOSE FOUND IN ADVERTISING[...]

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  • Page 5

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) i INTR ODUCTION This Service Manual contains basic facts and figures on the NP7161/NP7160 needed to service the machine in the field. This copier is designed to enable full automatic copying work, and comes with the following systems accessories: 1.[...]

  • Page 6

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) ii The following rules apply throughout this Service Manual: 1. Each chapter contains sections explaining the purpose of specific functions and the relationship between electrical and mechanical systems with reference to the timing of operation. In [...]

  • Page 7

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) iii System Configuration The copier is designed to accommodate the following accessories: *NP7161 only. ADF-G1* Control Card IV N Feeds a stack of original pages to the copyboard page by page. Stapler Sorter-L1* In addition to the functions of a 10-[...]

  • Page 8

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) iv[...]

  • Page 9

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) v CONTENTS CHAPTER 1 GENERAL DESCRIPTION I. FEATURES .............................................. 1-1 II. SPECIFICATIONS ................................... 1-2 A. Copier ................................................. 1-2 1. Type ..............[...]

  • Page 10

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) vi CHAPTER 3 EXPOSURE SYSTEM I. OUTLINE OF OPERATION ..................... 3-1 A. Changing the Reproduction Ratio ...... 3-1 II. LENS DRIVE SYSTEM ............................ 3-3 A. Driving the Lens ................................. 3-3 1. Outline [...]

  • Page 11

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) vii 1. Removing the Drum Unit ........... 4-28 2. Cleaning the Photosensitive Drum ........................................... 4-29 3. Removing the Cleaner Thermistor .................................. 4-29 D. Primary Charging Assembly ............ [...]

  • Page 12

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) viii CHAPTER 6 FIXING SYSTEM I. OUTLINE OF OPERATION ..................... 6-1 A. Outline ................................................ 6-1 B. Controlling the Fixing Temperature ... 6-2 C. Error Detection Circuit ........................ 6-5 1. O[...]

  • Page 13

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) ix CHAPTER 8 INSTALLATION I. SELECTING THE SITE ............................ 8-1 II. UNPACKING AND INSTALLATION ........ 8-2 A. Unpacking .......................................... 8-2 B. Removing the Metal Fixings ............... 8-3 C. Mounting th[...]

  • Page 14

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) x B. Image Fault Samples ..................... 10-28 C. Troubleshooting Image Faults ....... 10-29 1. The copy is too light. (halftone area only) .................. 10-29 2. The copy is too light. (including solid black area) ...... 10-30 3. The cop[...]

  • Page 15

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) xi 1. DC Controller PCB ................... 10-77 2. Power Supply PCB .................. 10-80 3. Lamp Regulator PCB ............... 10-80 4. High-Voltage Power Supply PCB .......................................... 10-81 VII. SERVICE MODE ..........[...]

  • Page 16

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  • Page 17

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) I. FEATURES .............................................. 1-1 II. SPECIFICATIONS ................................... 1-2 A. Copier ................................................. 1-2 III. NAMES OF PARTS .................................. 1-8 A. E[...]

  • Page 18

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  • Page 19

    COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 1–1 CHAPTER 1 GENERAL DESCRIPTION I. FEA TURES 1. The copier is designed light in weight (about 42 kg), and compact in size (566 mm wide, 541mm deep). 2. The copier turns out as many as 16 copies each minute (A4/LTR). 3. The addition of the Casset[...]

  • Page 20

    1–2 COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 1 GENERAL DESCRIPTION II. SPECIFICA TIONS A. Copier 1. Type 2. Mechanisms Body Copyboard Light source Lens Photosensitive material Desktop Fixed Halogen lamp (120V:200W/230V:220W) Lens array OPC (30 dia.) Copying Charging Exposure Copy[...]

  • Page 21

    COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 1–3 CHAPTER 1 GENERAL DESCRIPTION 3. Performance Original type Maximum original size Direct Reduce I Reduce II Reduce III Reduce IV Enlarge I Enlarge II Enlarge III Enlarge IV Zoom Wait time First copy Continuous copying Copy size Cassette Multife[...]

  • Page 22

    1–4 COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 1 GENERAL DESCRIPTION Claws Frame Copy tray Leading edge Trailing edge Left/right Auto clear Auto power-off Auto pre-heat Accessories Used 55 mm deep (500 sheets of 80 g/m 2 paper; 250 sheets if B5) 100 sheets approx. (plain paper ; 64[...]

  • Page 23

    COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 1–5 CHAPTER 1 GENERAL DESCRIPTION 4. Others Specifications subject to change without notice. Temperature Humidity Atmospheric pressure 120V 120V (UL) 127V 230V Maximum Standby Continuous Copying Standby Ozone (8-hr average) Width Depth Height Copy[...]

  • Page 24

    1–6 COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 1 GENERAL DESCRIPTION Size A3 (297 × 420mm) A4 (210 × 297mm) B4 (257 × 364mm) B5 (182 × 257mm) A4R (297 × 210mm) B5R (257 × 182mm) A3 → A4R B4 → B5R B4 → A4R A3 → B4 A4 → B5 A5R → A3 A4R → A3 B5R → B4 A4R → B4 B[...]

  • Page 25

    COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 1–7 CHAPTER 1 GENERAL DESCRIPTION Size 11" × 17" (279 × 432mm) LTR (297 × 216mm) LGL (216 × 356mm) LTRR (216 × 297mm) Reproduction mode Copy paper 11" × 17" LTR LGL LTRR LTRR LGL LTRR 11" × 17" 11" × 17&q[...]

  • Page 26

    1–8 COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 1 GENERAL DESCRIPTION III. NAMES OF PARTS A. External Vie w Figure 1-301 Figure 1-302 [4] Lower delivery cover [5] Front fixing cover [6] Inside cover [7] Open/close lever [8] Lower inside cover [9] Static eliminator [1] Copy tray [2] [...]

  • Page 27

    COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 1–9 CHAPTER 1 GENERAL DESCRIPTION B. Cr oss Section 1. Copier [1] [2] [3] [4] [5] [6] [10] [11] [13] [7] [8] [9] [14] [12] [15] [16] [17] [19] [24] [25] [26] [20] [21] [22] [23] [18] [21] Transfer charging assembly [22] Separation static eliminato[...]

  • Page 28

    1–10 COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 1 GENERAL DESCRIPTION IV . OPERA TING THE MA CHINE A. Contr ol P anel ID 2 3 1 5 6 4 8 9 7 0 C Reset Additional Functions Interrupt Clear Start Stop Energy Saver Auto Zoom % Zoom Paper Select Auto Paper A3/1117 A4/LTR A4/LTR B4/LGL B5[...]

  • Page 29

    COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 1–11 CHAPTER 1 GENERAL DESCRIPTION Ref. Name [15] [16] [17] [18] [19] [20] [21] [22] [23] [24] [25] [26] [27] [28] * Applies to the NP7161 only Description Remarks [10] [11] [12] [13] [14] *Requires an ADF. *Requires an ADF. Flashes when the waste[...]

  • Page 30

    1–12 COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 1 GENERAL DESCRIPTION B. User Mode 1. Outline The copier provides user modes, which may be changed freely by the user. These modes provide the functions shown in the following table. Notation Resetting user mode Changing auto clear ti[...]

  • Page 31

    COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 1–13 CHAPTER 1 GENERAL DESCRIPTION Changing Page Fit mode (ratio) Changing Page Fit mode (centering) Changing Page Fit mode (non-image width) Correcting density Setting special paper mode Drum cleaning mode 93% ON OFF 0 0 OFF U09 U10 U11 U12 U13 U[...]

  • Page 32

    1–14 COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 1 GENERAL DESCRIPTION V . ROUTINE MAINTENANCE (BY THE USER) Instruct the user to clean the following parts at least once a week. 1. Copyboard Glass Wipe with a moist cloth (moistened with water or mild detergent solution); then, dry w[...]

  • Page 33

    COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 1–15 CHAPTER 1 GENERAL DESCRIPTION VI. POINTS T O NO TE (BY THE USER) • Toner Cartridge Instruct the user to dispose of any used (empty) toner cartridge according to governmental guidelines. • Waste Toner Box Instruct the user to keep any wast[...]

  • Page 34

    1–16 COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 1 GENERAL DESCRIPTION VII. IMA GE FORMA TION A. Outline The copier is constructed as shown in Figure 1-701. Copyboard glass Scanning lamp Lens Pre-exposure lamp Fixing assembly Primary charging assembly Blanking exposure lamp Static e[...]

  • Page 35

    COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 1–17 CHAPTER 1 GENERAL DESCRIPTION The copier's image formation processes consist of the following eight steps: Step 1 Pre-exposure Step 2 Primary charging (negative DC) Step 3 Image exposure Step 4 Development (AC + negative DC) Step 5 Trans[...]

  • Page 36

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  • Page 37

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 2 BASIC OPERATION I. BASIC MECHANISMS ............................. 2-1 A. Functional Construction ..................... 2-1 B. Outline of the Electrical Circuitry ........ 2-2 C. Basic Sequence of Operations .......... 2-4 D. Main Motor (M1[...]

  • Page 38

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  • Page 39

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 2–1 CHAPTER 2 BASIC OPERATION I. BASIC MECHANISMS A. Functional Construction The copier can broadly be divided into the following four functional blocks: pick-up, feeding, exposure, image formation, and control. Figure 2-101 Control system Copyboa[...]

  • Page 40

    2–2 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 2 BASIC OPERATION B. Outline of the Electrical Cir cuitr y The copier's major electrical mechanisms are controlled by the microprocessor on the DC controller PCB. The ICs on the DC controller PCB are shown below. IC121 (ROM) • C[...]

  • Page 41

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 2–3 CHAPTER 2 BASIC OPERATION Figure 2-102 <Control> <Loads> <Sensors> Sensors Switches Toner sensor AE sensor Control panel Thermistors DC controller PCB IC119 (CPU) Cassette relay PCB Motors Fans Clutches Solenoids Counter LEDs[...]

  • Page 42

    2–4 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 2 BASIC OPERATION C. Basic Sequence of Operations 1. Basic Sequence of Operations at Power-On Figure 2-103 Power switch ON 160 ° C 120 ° C Wait indicator WMUP WMUPR (flashing) Green STBY Sequence Scanner motor (M2) Scanner home posit[...]

  • Page 43

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 2–5 CHAPTER 2 BASIC OPERATION WMUP (warm-up) From when the power switch is turned on until the surface temperature of the upper fixing roller reaches 120˚C. Waits until the upper fixing roller warms up. Moves the lens, mirror, and scanner to home[...]

  • Page 44

    2–6 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 2 BASIC OPERATION 2. Basic Sequence of Operations at Copy Start Figure 2-104 Start key ON Wait indicator STBY Green Orange FW RV STBY LSTR SCRV SCFW SCRV SCFW INTR AER Sequence Scanner motor (M2) Scanner home position sensor (PS1) Fixi[...]

  • Page 45

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 2–7 CHAPTER 2 BASIC OPERATION Table 2-102 INTR (initial rotation) From when the Start key is pressed until the scanner starts to move forward. Stabilizes the drum sensitivity in preparation for copying operation. Period Description Remarks AER (AE[...]

  • Page 46

    2–8 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 2 BASIC OPERATION D . Main Motor (M1) Control Cir cuitr y 1. Outline Figure 2-105 shows the circuit used to control the main motor (M1), and the circuit has the following functions: • Turning on and off the main motor. • Controllin[...]

  • Page 47

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 2–9 CHAPTER 2 BASIC OPERATION E. Inputs to the DC Controller 1. Inputs to the DC Controller (1/3) Figure 2-106 DC controller PCB +5V J12 -1 -2 -3 J103 -B3 -B2 -B1 Scanner home position sensor When the scanner is at home position, '1'. (W[...]

  • Page 48

    2–10 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 2 BASIC OPERATION 2. Inputs to the DC Controller (2/3) Figure 2-107 DC controller PCB +5V J48 -3 -1 -2 J107 -B5 -B7 -B6 Right door open sensor RDOPDT PS11 J106 -9 Waste toner sensor When the waste toner box is identified as being full[...]

  • Page 49

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 2–11 CHAPTER 2 BASIC OPERATION 3. Inputs to the DC Controller (3/3) Figure 2-108 DC controller PCB +24V +5V J103 -A4 -A3 -A2 -A1 AE sensor See p. 4-21. AE_DATA AE_REF J16 -2 -3 -4 -5 -1 J110 -4 -3 -2 -1 -5 Cassette size switch PCB See p. 5-7. CSTS[...]

  • Page 50

    2–12 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 2 BASIC OPERATION F . Outputs from the DC Contr oller 1. Outputs from the DC Controller (1/4) Figure 2-109 DC controller PCB Cassette/Drum heater (H2) (accessory) Heater switch (SW1) (accessory) Cassette heater (H4) (accessory) Mirror[...]

  • Page 51

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 2–13 CHAPTER 2 BASIC OPERATION 2. Outputs from the DC Controller (2/4) Figure 2-110 DC controller PCB +24V J106 -16 -17 J601 -4 -1 -2 -3 J212 -9 -8 J209 -4 -1 -2 -3 Main motor MM_DR MM_LKDT* See p. 2-8. See p. 3-7. See p. 3-4. See p. 3-4. M1 Power[...]

  • Page 52

    2–14 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 2 BASIC OPERATION 3. Outputs from the DC Controller (3/4) Figure 2-111 DC controller PCB J104 -B1 -B2 -B3 Cooling fan 1 SCFAN_DT* SCFAN_DR FM1 -3 -2 -1 -1 -2 -3 J14 -B10 -B11 -B12 Exhaust fan 1 EXFAN1_DT* EXFAN1_DR FM2 -3 -2 -1 J20 -B[...]

  • Page 53

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 2–15 CHAPTER 2 BASIC OPERATION 4. Outputs from the DC Controller (4/4) Figure 2-112 DC controller PCB +24V J102 -A11 -A10 Total counter TCNT_DR* When '0', CNT1 turns on. CNT1 -1 -2 J33 +24V -A13 -A12 Accessory counter (accessory) OPCNT_D[...]

  • Page 54

    2–16 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 2 BASIC OPERATION G. Inputs to and Outputs from Accessories (1/1) Figure 2-113 DC controller PCB +5V J104 -A9 -A11 -A10 -A8 To Control Card IV N To ADF CCD* CCDT* -4 -2 -3 -1 -4 -2 -3 -1 J120 -1 -3 -2 -4 J955 -1 -2 -3 -4 See the ADF S[...]

  • Page 55

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 3 EXPOSURE SYSTEM I. OUTLINE OF OPERATION ..................... 3-1 A. Changing the Reproduction Ratio ...... 3-1 II. LENS DRIVE SYSTEM ............................ 3-3 A. Driving the Lens ................................. 3-3 III. SCANNER D[...]

  • Page 56

    [...]

  • Page 57

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 3–1 CHAPTER 3 EXPOSURE SYSTEM I. OUTLINE OF OPERA TION A. Changing the Repr oduction Ratio The reproduction ratio in the axial direction of the photosensitive drum is varied by the lens drive system and the mirror drive system, and that in the per[...]

  • Page 58

    3–2 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 3 EXPOSURE SYSTEM Figure 3-102 Copyboard glass Lens No.4/No.5 mirror unit Photosensitive drum Enlarge Reduse Enlarge/reduce[...]

  • Page 59

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 3–3 CHAPTER 3 EXPOSURE SYSTEM II. LENS DRIVE SYSTEM A. Driving the Lens 1. Outline The lens is driven by the lens motor (M3) and the mirror motor (M4). As shown in Figure 3-201, when the lens motor rotates in normal direction, the lens moves in th[...]

  • Page 60

    3–4 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 3 EXPOSURE SYSTEM 2. Motor Control Circuit The lens motor (M3) and the mirror motor (M4) are 4-phase stepping motors, and are controlled by the motor drive power supply signal (COM) and four drive pulse signals (A, B, A*, B*) generated[...]

  • Page 61

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 3–5 CHAPTER 3 EXPOSURE SYSTEM 3. Moving the Lens The lens and the No. 4/ No. 5 mirror unit are moved with reference to the points at which the lens home position sensor (PS2) and the mirror home position sensor (PS3) turn on. The number of pulses [...]

  • Page 62

    3–6 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 3 EXPOSURE SYSTEM III. SCANNER DRIVE SYSTEM A. Outline The scanner is driven by the scanner motor (M2) As shown in Figure 3-301, when the scanner motor rotates in reverse direction, the scanner moves forward by the drive coming through[...]

  • Page 63

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 3–7 CHAPTER 3 EXPOSURE SYSTEM B. Scanner Motor Contr ol Circuit The scanner motor (M2) is a 4-phase stepping motor, and is controlled by four pulse signals (SC_A, SC_B, SC_A*, SC_B*) generated by the DC controller PCB. The scanner motor is turned [...]

  • Page 64

    3–8 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 3 EXPOSURE SYSTEM D . Basic Sequence of Operations (scanner) The scanner is moved forward over a distance determined by the microprocessor based on the selected paper size, reproduction ratio, and copying mode. The microprocessor compu[...]

  • Page 65

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 3–9 CHAPTER 3 EXPOSURE SYSTEM E. Scanner Movement in P age Separation Mode Figure 3-304 I, II, and III shown in Figure 3-304 are controlled by the microprocessor on the DC controller PCB with reference to the wait position of the scanner. The leng[...]

  • Page 66

    3–10 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 3 EXPOSURE SYSTEM IV . OTHERS A. Detecting the Original Size 1. Outline The NP7161 is equipped with auto paper selection and auto reproduction selection functions, and these functions require identification of the size of originals. T[...]

  • Page 67

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 3–11 CHAPTER 3 EXPOSURE SYSTEM V . DISASSEMBL Y/ASSEMBL Y The copier may be disassembled and assembled as shown here. Pay attention to the copier's mechanical characteristics along with the steps for disassembly/assembly. Important: 1. Turn o[...]

  • Page 68

    3–12 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 3 EXPOSURE SYSTEM A. Scanner Drive Assemb ly 1. Removing the Scanner Motor 1) Remove the rear upper cover. 2) Disconnect the connector [1] and the two mounting screws [2]. 3) Slide the scanner motor [3] to the right to detach from the[...]

  • Page 69

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 3–13 CHAPTER 3 EXPOSURE SYSTEM Figure 3-503 [3] [1] [2] 2. Removing the Scanner Drive Cable 1) In standby state, press the Reduce key so that the lens and the No.4 /No.5 mirror unit move to 70% reproduction position. 2) Turn off the power switch, [...]

  • Page 70

    3–14 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 3 EXPOSURE SYSTEM [4] [5] [6] [B] [7] [A] [7] Figure 3-504 Figure 3-506 Figure 3-505 [8] [9] [10] 10) Remove the three mounting screws [4], and detach the motor base [5] and the timing belt [6]. Caution: When detaching the motor base,[...]

  • Page 71

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 3–15 CHAPTER 3 EXPOSURE SYSTEM 3. Routing the Scanner Drive Cable Route the scanner drive cable following the sequence indicated in Figure 3-507, i.e., [1] through [7]. Be sure to adjust the mirror position and the tension as indicated later after[...]

  • Page 72

    3–16 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 3 EXPOSURE SYSTEM Figure 3-508a (Rear) Figure 3-508b (Front) [1] [2] [1] [2] Figure 3-509a (Rear) Figure 3-509b (Front) 4. Adjusting the Position of the Mirror Be sure to adjust the position of the mirror as follows after you have mou[...]

  • Page 73

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 3–17 CHAPTER 3 EXPOSURE SYSTEM 10mm 10mm Scanner [1] [1] [A] Figure 3-510 Figure 3-511 5. Adjusting the Tension of the Scanner Drive Cable Be sure to adjust the tension as follows after routing the scanner drive cable. 1) Move the scanner to home [...]

  • Page 74

    3–18 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 3 EXPOSURE SYSTEM B. Lens Drive Assemb ly 1. Removing the Lens Drive Motor 1) Remove the copyboard glass. (See p.7-14) 2) Holding the bend [A], slide out the scanner as far as the cut-off [B]. 3) Remove the inside cover and the delive[...]

  • Page 75

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 3–19 CHAPTER 3 EXPOSURE SYSTEM 2. Removing the Mirror Motor 1) While the copier is in standby state, press the Enlarge key to move the lens and the No. 4/No. 5 mirror unit to 200% position. 2) Turn off the power switch, and disconnect the power pl[...]

  • Page 76

    3–20 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 3 EXPOSURE SYSTEM Figure 3-516 [3] [2] [2] [5] [4] Figure 3-517 8) Remove the two mounting screws [2], and remove the lens hood [3]. Caution: When mounting the lens hood, take care not to trap the wire. 9) Remove the two mounting scre[...]

  • Page 77

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 4 IMAGE FORMATION SYSTEM I. OUTLINE OF THE PROCESSES ............ 4-1 A. Outline ................................................ 4-1 B. Basic Sequence of Operations (image formation system) .................. 4-2 C. Controlling the Intensit[...]

  • Page 78

    [...]

  • Page 79

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 4–1 CHAPTER 4 IMAGE FORMATION SYSTEM I. OUTLINE OF THE PROCESSES A. Outline Figure 4-101 shows the copier's basic construction in reference to image formation. Image formation consists of the following functions: • Scanning lamp control •[...]

  • Page 80

    CHAPTER 4 IMAGE FORMATION SYSTEM 4–2 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) B. Basic Sequence of Operations (ima ge formation system) Figure 4-102 Start key ON STBY STBY LSTR SCRV SCFW SCRV SCFW INTR AER Sequence Main motor (M1) Primary charging assembly Developing DC bias Developing A[...]

  • Page 81

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 4–3 CHAPTER 4 IMAGE FORMATION SYSTEM C. Contr olling the Intensity of the Scanning Lamp 1. Outline Figure 4-103 shows the circuit used to control the intensity of the scanning lamp, and the circuit has the following functions: 1. Turning on/off th[...]

  • Page 82

    CHAPTER 4 IMAGE FORMATION SYSTEM 4–4 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 2. Operation a. Turning On/Off the Scanning Lamp When the scanning lamp drive signal (LMPDR) is ‘0’, the output of the control circuit goes ‘0’, keeping the drive circuit from turning on and therefore n[...]

  • Page 83

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 4–5 CHAPTER 4 IMAGE FORMATION SYSTEM 3. Protection Mechanisms To prevent malfunction of the scanning lamp (LA1), the copier is equipped with a fuse (FU1). If the temperature around the scanning lamp increases abnormally (about 141°C or more) beca[...]

  • Page 84

    CHAPTER 4 IMAGE FORMATION SYSTEM 4–6 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Figure 4-108 2. Turning On/Off the Primary/Transfer Bias a. When the primary/transfer bias is off, • When HVT_DR is 0, Oscillation control circuit turns off Primary/transfer high-voltage transformer turns off[...]

  • Page 85

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 4–7 CHAPTER 4 IMAGE FORMATION SYSTEM E. Controlling the De veloping/Separation Static Eliminator Bias 1. Outline Figure 4-109 shows the circuit used to control the developing/static eliminating bias, and the circuit has the following functions: 1.[...]

  • Page 86

    CHAPTER 4 IMAGE FORMATION SYSTEM 4–8 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Start key ON STBY STBY LSTR SCRV SCFW SCRV SCFW INTR AER Sequence Developing DC bias Developing AC bias Voltage control Figure 4-110 2. Turning On/Off the Developing DC Bias a. Turning On/Off the Developing DC [...]

  • Page 87

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 4–9 CHAPTER 4 IMAGE FORMATION SYSTEM 3. Turning On/Off the Developing AC Bias/Separation Eliminator Bias a. Turning On/Off the Developing AC Bias • When DV_AC_DR is 0, control circuit turns off oscillation circuit turns off amplification circuit[...]

  • Page 88

    CHAPTER 4 IMAGE FORMATION SYSTEM 4–10 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Figure 4-111 F1 F2 F3 F4 F5 F6 F7 F8 F9 -600 Developing DC bias (V) -500 -400 -300 -200 -100 Copy density Darker Lighter 5 1 2 3 4 CPY _ DNS (V) 4. Controlling the Developing DC Bias to a Specific Voltage to S[...]

  • Page 89

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 4–11 CHAPTER 4 IMAGE FORMATION SYSTEM Table 4-102 Developing DC bias [V] Copy density CPY _ DNS [V] -110 F1 1.00 -120 F1.25 1.09 -130 F1.5 1.18 -140 F1.75 1.27 -150 F2 1.36 -160 F2.25 1.45 -170 F2.5 1.54 -180 F2.75 1.63 -190 F3 1.72 -200 F3.25 1.8[...]

  • Page 90

    CHAPTER 4 IMAGE FORMATION SYSTEM 4–12 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Blank exposure lamp (LA3) DC controller PCB +24V BLK _ SD J101 -A6 J551 -10 -A10 -6 -A7 -9 -A8 -8 Control circuit Center (10 pcs) LED circuit (40 pcs) +5V -A9 -7 BLK _ SCK -A11 -5 BLK _ LCK -A12 -4 BLK _ DEN* [...]

  • Page 91

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 4–13 CHAPTER 4 IMAGE FORMATION SYSTEM 2. Turning On the Blank Exposure Lamp in Reduce Mode While the original is being illuminated in Reduce mode, as many LEDs (both front and rear) as suited to the selected reduction ratio are turned on to blank [...]

  • Page 92

    CHAPTER 4 IMAGE FORMATION SYSTEM 4–14 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) II. DEVELOPING ASSEMBL Y/DRUM CLEANER ASSEMBL Y A. Outline The developing assembly and the drum cleaner are rotated by the drive from the main motor (M1) through drive gears. The level of toner inside the deve[...]

  • Page 93

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 4–15 CHAPTER 4 IMAGE FORMATION SYSTEM The copier is designed to collect more waste toner than existing models, and is equipped with a paddle at the bottom of the waste toner box. The paddle is linked to the movement of the cassette, and is designe[...]

  • Page 94

    CHAPTER 4 IMAGE FORMATION SYSTEM 4–16 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) B. Detecting and Contr olling the Level of T oner The toner inside the developing assembly is monitored by the toner sensor (TS1). The toner sensor uses a piezoelectric oscillator which oscillates in the absen[...]

  • Page 95

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 4–17 CHAPTER 4 IMAGE FORMATION SYSTEM Figure 4-205 DC controller PCB Cleaning blade Waste toner feeding screw Photosensitve drum Flag PS8 Waste toner feeding screw locked detection signal (TRQMLDT) Main motor drive command Gear A M1 Spring clutch [...]

  • Page 96

    CHAPTER 4 IMAGE FORMATION SYSTEM 4–18 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Figure 4-206 DC controller PCB Reference voltage circuit TNFDT Power supply PCB HVT J106 -9 +5V J303 -1 -2 -3 J301 -1 J210 -10 J212 -16 Waste toner sensor (light-emitting unit) Waste toner box Waste toner sens[...]

  • Page 97

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 4–19 CHAPTER 4 IMAGE FORMATION SYSTEM When as many as 100 copies (A4) have been made during a pre-waste toner full condition, the DC controller PCB will identify the condition as “waste toner full,” stopping to flash the Waste Toner indicator [...]

  • Page 98

    CHAPTER 4 IMAGE FORMATION SYSTEM 4–20 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Table 4-202 E. Control b y the Cleaner Thermistor The copier is equipped with a thermistor (cleaner thermistor TH3) used to detect overheating of the drum cleaner assembly, and is designed to perform the follo[...]

  • Page 99

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 4–21 CHAPTER 4 IMAGE FORMATION SYSTEM F . A uto Density Adjustment (AE) 1. Outline The copier is equipped with an automatic density adjustment mechanism (AE), which controls the developing DC bias to suit the density of originals. As long as the o[...]

  • Page 100

    CHAPTER 4 IMAGE FORMATION SYSTEM 4–22 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Figure 4-209 shows changes in the developing DC bias in relation to the density of different originals. If the density of the original is higher (darker) than the Test Sheet and lower (lighter) than a newspape[...]

  • Page 101

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 4–23 CHAPTER 4 IMAGE FORMATION SYSTEM III. DISASSEMBL Y/ASSEMBL Y The copier may be disassembled and assembled as shown here. Pay attention to the copier's mechanical characteristics along with the steps for disassembly/assembly. Important: 1[...]

  • Page 102

    CHAPTER 4 IMAGE FORMATION SYSTEM 4–24 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) A. Scanning Lamp Assembl y 1. Removing the Scanning Lamp 1) Remove the copyboard glass. (See .7-14) 2) Holding the bend [A], pull out the scanner as far as the cut-off [B]. 3) Remove the mounting screw [1], an[...]

  • Page 103

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 4–25 CHAPTER 4 IMAGE FORMATION SYSTEM 4) Wrap both ends of the scanning lamp [3] with lint-free paper. Then, remove the lamp while pushing toward the rear end. Caution: 1. Do not work if the surface of the scanning lamp is hot. 2. Do not leave fin[...]

  • Page 104

    CHAPTER 4 IMAGE FORMATION SYSTEM 4–26 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) B. Exposure Assembl y 1. Removing the Pre-Exposure/Blank Exposure Lamp Assembly 1) Remove the developing assembly. (See p.4-37) 2) Remove the drum unit. (See p.4-28) 3) Remove the inside over. 4) Disconnect th[...]

  • Page 105

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 4–27 CHAPTER 4 IMAGE FORMATION SYSTEM [1] [2] [3] Figure 4-308 Figure 4-309 3. Cleaning the No. 6 Mirror 1) Remove the developing assembly. (See p. 4-37.) 2) Remove the drum unit. (See p. 4-28.) 3) Remove the dust-proofing glass. (See p. 4-26.) 4)[...]

  • Page 106

    CHAPTER 4 IMAGE FORMATION SYSTEM 4–28 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) C. Drum Unit 1. Removing the Drum Unit 1) Open the top unit, release the developing assembly. 2) Remove the thumb screw [1], and slide out the drum unit [2] to the front to remove. Caution: • The photosensit[...]

  • Page 107

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 4–29 CHAPTER 4 IMAGE FORMATION SYSTEM 2. Cleaning the Photosensitive Drum If the surface of the photosensitive drum is soiled, wipe it with a flannel cloth coated with toner. Caution: • Do not dry wipe the surface of the photosensitive drum. Do [...]

  • Page 108

    CHAPTER 4 IMAGE FORMATION SYSTEM 4–30 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) [3] [1] [2] Figure 4-312 [4] [5] Figure 4-313 D . Primary Charging Assembly 1. Removing the Primary Charging Assembly 1) Remove the drum unit. (See p. 4-28.) 2) Pull the charging wire cleaning lever [1] slight[...]

  • Page 109

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 4–31 CHAPTER 4 IMAGE FORMATION SYSTEM [2] [3] [1] [4] Figure 4-314 E. T ransfer Charging Assembl y 1. Removing the Transfer Charging Assembly 1) Open the copier top, and remove the front door. 2) Pull the charging wire cleaning lever [1] slightly [...]

  • Page 110

    CHAPTER 4 IMAGE FORMATION SYSTEM 4–32 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) F . Charging Wire 1. Outline As many as two charging wires are located around the photosensitive drum. (These charging wires are 0.06 mm in diameter.) 2. Stringing the Charging Wires Basically, all charging wi[...]

  • Page 111

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 4–33 CHAPTER 4 IMAGE FORMATION SYSTEM 2) Remove the sheet (front) [4] and the sheet (rear) [5]. To remove the transfer charging assembly, remove the sheet (front) [c] and the sheet (rear) [d]. 3) Remove the spring [6], and remove the charging wire[...]

  • Page 112

    CHAPTER 4 IMAGE FORMATION SYSTEM 4–34 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Figure 4-318 A Figure 4-319 4) Free a length of about 5 cm from the charging wire reel (0.06 mm wire). Reference: To form a loop, wind the charging wire around a hex key once, and turn the hex key three to fou[...]

  • Page 113

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 4–35 CHAPTER 4 IMAGE FORMATION SYSTEM 8) Cut the excess charging wire with a nipper. 9) Pick the end of the charging wire tensioning spring with tweezers, and hook it on the charging electrode. Note: Go through the following: • Be sure that the [...]

  • Page 114

    CHAPTER 4 IMAGE FORMATION SYSTEM 4–36 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 3. Adjusting the Height of the Charging Wires To adjust each charging wire, turn its respective height adjusting screw. A full turn on the screw will change the height of the primary charging wire by about 0.5[...]

  • Page 115

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 4–37 CHAPTER 4 IMAGE FORMATION SYSTEM [2] [1] [3] Figure 4-324 G. De veloping Assembly 1. Removing the Developing Assembly 1) Open the front door, and release the developing assembly. 2) Remove the mounting screw [1], and remove the stopper [2]. 3[...]

  • Page 116

    CHAPTER 4 IMAGE FORMATION SYSTEM 4–38 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 4) Lift the front of the developing upper cover [6] slightly, and slide it in the direction of the arrow to remove. [6] Figure 4-327 [8] [7] [2] [1] Figure 4-328 Figure 4-329 5) Place a newspaper or the like o[...]

  • Page 117

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 4–39 CHAPTER 4 IMAGE FORMATION SYSTEM 3) Remove the grip ring [3], and remove the developing roll [4]. 4) Remove the two mounting screws [5], and remove the bearing holder (front) [6] and the bearing [7]. [3] [4] [5] [6] [7] [5] Figure 4-330 5) Re[...]

  • Page 118

    CHAPTER 4 IMAGE FORMATION SYSTEM 4–40 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) [15] [17] [18] [16] Figure 4-333 9) Remove the two mounting screws [15]; then, remove the bearing holder (rear) [16], bearing [17], and developing roll [18]. Figure 4-334 [19] 10) Remove the developing cylinde[...]

  • Page 119

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 5 PICK-UP/FEEDING SYSTEM This chapter explains the principles used from when copy paper is picked up to when a copy is delivered in view of the functions of electrical and mechanical units and in relation to their timing of operation. It als[...]

  • Page 120

    [...]

  • Page 121

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 5–1 CHAPTER 5 PICK-UP/FEEDING SYSTEM I. OUTLINE OF OPERA TION The copier uses a center reference feeding method, in which copy paper is moved along the center of the pick-up/feeding path to ensure stable movement. The pick-up system consists of th[...]

  • Page 122

    CHAPTER 5 PICK-UP/FEEDING SYSTEM 5–2 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) II. PICK-UP FR OM THE CASSETTE A. Pic k-Up Operation The pick-up roller and the feed roller are controlled by the pick-up solenoid (SL1). The stack of copy paper inside the cassette is held up by the lifter, an[...]

  • Page 123

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 5–3 CHAPTER 5 PICK-UP/FEEDING SYSTEM B. Sequence of Operations (pic k-up/feeding) • A4, 2 Copies Figure 5-202 Start key ON STBY FW RV STBY LSTR SCRV SCFW SCRV SCFW INTR AER Sequence Scanner motor (M2) Scanner home position sensor (PS1) Pick-up s[...]

  • Page 124

    CHAPTER 5 PICK-UP/FEEDING SYSTEM 5–4 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) C. Operation of the Cassette Lifter When the cassette is pushed inside the copier, the lifter stopper will be freed, and the lifter will move up by the force of a spring. At this time, the copy paper will push [...]

  • Page 125

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 5–5 CHAPTER 5 PICK-UP/FEEDING SYSTEM The copier’s cassette is designed to apply auxiliary pressure on paper of B4 or wider. The auxiliary tension spring acts on the lifter through the cut-off in the bottom of the cassette when the side guide pla[...]

  • Page 126

    CHAPTER 5 PICK-UP/FEEDING SYSTEM 5–6 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) D . Detecting the Size of the Cassette 1. Outline The presence of paper and the size of paper inside the cassette are checked by the cassette size switch PCB mounted to the left of the cassette slot. When the c[...]

  • Page 127

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 5–7 CHAPTER 5 PICK-UP/FEEDING SYSTEM 2. Detecting the Cassette Size The AB configuration and the Inch configuration are distinguished by the switch (SW654) on the cassette switching PCB. The size of the paper inside the cassette is identified with[...]

  • Page 128

    CHAPTER 5 PICK-UP/FEEDING SYSTEM 5–8 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) III. PICK-UP FROM THE MUL TIFEEDER A. Pic k-Up Operation The presence/absence of copy paper in the multifeeder is detected by the multifeeder paper sensor (PS7). When the multifeeder is selected and the Start k[...]

  • Page 129

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 5–9 CHAPTER 5 PICK-UP/FEEDING SYSTEM B. Detecting the Size of P aper in the Multifeeder When the user sets the slide guide of the multifeeder to the width of copy paper, the multifeeder paper width sensor 1 (PS9) and the multifeeder paper width se[...]

  • Page 130

    CHAPTER 5 PICK-UP/FEEDING SYSTEM 5–10 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) C. Sequence of Operations (pic k-up from m ultifeeder) • A4, 2 Copies Figure 5-303 Start key ON STBY FW RV STBY LSTR SCRV SCFW SCRV SCFW INTR AER Sequence Scanner motor (M2) Scanner home position sensor (PS1[...]

  • Page 131

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 5–11 CHAPTER 5 PICK-UP/FEEDING SYSTEM IV . CONTROLLING THE REGISTRA TION CLUTCH The registration clutch exerts the following control so as to match copy paper with the image on the photosensitive drum at a specific location. Copy paper B Copy pape[...]

  • Page 132

    CHAPTER 5 PICK-UP/FEEDING SYSTEM 5–12 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) V . DETECTING JAMS A. Outline The copier is equipped with the following two sensors used to check the movement of copy paper. • Registration paper sensor (PS5) • Delivery paper sensor (PS6) Jams are identi[...]

  • Page 133

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 5–13 CHAPTER 5 PICK-UP/FEEDING SYSTEM B. Sequence of Operations (jam detection) 1. Registration Delay Jam Figure 5-502 2. Registration Stationary Jam Start key ON Jam indicator flashed STBY SCFW SCRV SCFW INTR Sequence Pick-up solenoid (SL1) Regis[...]

  • Page 134

    CHAPTER 5 PICK-UP/FEEDING SYSTEM 5–14 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 3. Delivery Delay Jam Start key ON STBY SCRV SCFW SCRV SCFW INTR Sequence Registration roller clutch (CL1) Main motor (M1) Jam check Delivery paper sensor (PS6) Jam indicator flashed Normal Error approx 2.2sec[...]

  • Page 135

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 5–15 CHAPTER 5 PICK-UP/FEEDING SYSTEM VI. DISASSEMBL Y/ASSEMBL Y The copier may be disassembled and assembled as shown here. Pay attention to the copier’s mechanical characteristics along with the steps for disassembly/assembly. Important: 1. Tu[...]

  • Page 136

    CHAPTER 5 PICK-UP/FEEDING SYSTEM 5–16 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) [2] [1] [3] Figure 5-601 [4] Figure 5-602 A. Pic k-Up Assembly 1. Removing the Pick-Up Roller 1) Remove the cassette. 2) Remove the stepped screw [1], and pull the roller support plate [2] to the front to remo[...]

  • Page 137

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 5–17 CHAPTER 5 PICK-UP/FEEDING SYSTEM [1] [3] [2] [4] [2] Figure 5-603 [5] [5] [6] Figure 5-604 [1] [2] [2] Figure 5-605 3. Removing the Pick-Up Drive Assembly 1) Remove the registration roller assembly. (See p. 5-23.) 2) Remove the E-ring [1], an[...]

  • Page 138

    CHAPTER 5 PICK-UP/FEEDING SYSTEM 5–18 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 4) Slide the pick-up assembly [3] to the rear, and remove the hook. 5. Removing the Feed Roller 1) Remove the separation roller assembly. 2) While holding the claw [A], move the feed roller [2] in the directio[...]

  • Page 139

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 5–19 CHAPTER 5 PICK-UP/FEEDING SYSTEM [3] Figure 5-612 [5] [4] Figure 5-609 Figure 5-610 [1] [2] 4) Remove the roller cover [3]. 5) Remove the two bushings [4], and remove the two springs [5]. 6) While pushing the claw [A] with a flat- blade screw[...]

  • Page 140

    CHAPTER 5 PICK-UP/FEEDING SYSTEM 5–20 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Figure 5-613 Figure 5-614 [1] [2] Figure 5-615 [1] [3] [2] B. Multifeeder Assembl y 1. Removing the Multifeeder Tray 1) Open the multifeeder tray, and remove the face cover [1] using a flat-blade screwdriver. [...]

  • Page 141

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 5–21 CHAPTER 5 PICK-UP/FEEDING SYSTEM Figure 5-616 [3] [2] [1] Figure 5-617 [1] Figure 5-618 [4] [4] [5] [3] The two holes each (upper/lower) are spare holes. 4) Disconnect the two connectors [3], and remove the three mounting screws [4]; then, de[...]

  • Page 142

    CHAPTER 5 PICK-UP/FEEDING SYSTEM 5–22 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Figure 5-621 [2] [B] [A] [1] [5] [4] [2] [3] Figure 5-620 Figure 5-619 5) Detach the multifeeder separation pad [5] from the holder [4]. 5. Adjusting the Pressure of the Separation Pad If double feeding or pic[...]

  • Page 143

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 5–23 CHAPTER 5 PICK-UP/FEEDING SYSTEM [3] [2] [1] Figure 5-622 [5] [5] [4] [6] Figure 5-623 C. Registration Roller Assembl y 1. Removing the Registration Roller Assembly 1) Remove the developing assembly. (See p. 4-37.) 2) Remove the drum unit. (S[...]

  • Page 144

    CHAPTER 5 PICK-UP/FEEDING SYSTEM 5–24 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) D . Cassette Assembly 1. Removing the Cassette Size Switch 1) Remove the cassette. 2) Remove the delivery lower cover. (See p.7-11) 3) Disconnect the connector [1] (J110) of the DC controller PCB, and remove t[...]

  • Page 145

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 5–25 CHAPTER 5 PICK-UP/FEEDING SYSTEM •AB •INCH [1] [2] [1] [2] Figure 5-627 [3] [4] [3] [4] •AB •INCH 2. Changing the Cassette Size (AB/ INCH) 1) Slide out the cassette. 2) Loosen the mounting screw [1] on the left side of the cassette; t[...]

  • Page 146

    CHAPTER 5 PICK-UP/FEEDING SYSTEM 5–26 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 3. Adjusting the Left/Right Registration Turn the adjusting screw [1] until the cassette locking lever plate [2] and the cassette locking lever [3] engage. When the adjusting screw [1] is turned clockwise, the[...]

  • Page 147

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 6 FIXING SYSTEM I. OUTLINE OF OPERATION ..................... 6-1 A. Outline ................................................ 6-1 B. Controlling the Fixing Temperature ... 6-2 C. Error Detection Circuit ........................ 6-5 II. DISAS[...]

  • Page 148

    [...]

  • Page 149

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 6–1 CHAPTER 6 FIXING SYSTEM Figure 6-101 I. OUTLINE OF OPERA TION A. Outline The upper roller and the lower roller of the fixing assembly and the delivery roller of the delivery assembly are operated by the drive from the main motor (M1) coming th[...]

  • Page 150

    CHAPTER 6 FIXING SYSTEM 6–2 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) B. Contr olling the Fixing T emperature The copier uses two thermistors mounted at the rear ends of the upper roller to monitor surface temperature. When copies are made continuously using sheets of B4 or less, the temp[...]

  • Page 151

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 6–3 CHAPTER 6 FIXING SYSTEM • 182 mm > Paper Width Table 6-104 Temperature detected by thermistor at Start key on Target temperature immediately after Start key on Target temperature during continuous copying (upper limit) Less than 170 ° C [...]

  • Page 152

    CHAPTER 6 FIXING SYSTEM 6–4 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) • Power Save Key ON or Auto-Power OFF Figure 6-103 120 ° C 140 ° C 160 ° C 180 ° C 200 ° C 220 ° C *1 Start key ON STBY INTR COPY LSTR STBY Sequence Main motor (M1) Fixing heater (H1) Energy saver indicator *1:V[...]

  • Page 153

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 6–5 CHAPTER 6 FIXING SYSTEM C. Error Detection Cir cuit 1. Outline The copier’s error detection circuit is constructed as shown in Figure 6-104, and monitors the following items for an error: • Surface temperature of the upper fixing roller ?[...]

  • Page 154

    CHAPTER 6 FIXING SYSTEM 6–6 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 2. Surface Temperature of the Fixing Upper Roller The main thermistor (TH1) and the sub thermistor are arranged nearby at the rear of the fixing upper roller, and are used to monitor the difference in voltage between tw[...]

  • Page 155

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 6–7 CHAPTER 6 FIXING SYSTEM II. DISASSEMBL Y/ASSEMBL Y The copier may be disassembled and assembled as shown here. Pay attention to the copier’s mechanical characteristics along with the steps for disassembly/assembly. Important: 1. Turn off the[...]

  • Page 156

    CHAPTER 6 FIXING SYSTEM 6–8 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Figure 6-203 [1] [4] [3] [2] Fulcrum Locking arm Figure 6-201 Figure 6-202 [1] A. Fixing Assembly 1. Construction [1] Upper roller [2] Lower roller [3] Heat discharge roller [4] Delivery roller 2. Locking Mechanism 3. R[...]

  • Page 157

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 6–9 CHAPTER 6 FIXING SYSTEM Figure 6-204 Figure 6-205 Figure 6-206 [8] [7] [5] [3] [4] [6] [2] 3) Remove the drum unit. (See p. 4-28.) 4) Remove the delivery upper cover. (See p. 7-11.) 5) Remove the delivery lower cover. (See p. 7-11.) 6) Disconn[...]

  • Page 158

    CHAPTER 6 FIXING SYSTEM 6–10 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) [9] Figure 6-207 12) Lift the front of the fixing assembly [9] slightly to remove. Caution: When removing the fixing assembly, take care not to damage the feeding assembly. Figure 6-208 [2] [3] [1] 4. Removing the Fixi[...]

  • Page 159

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 6–11 CHAPTER 6 FIXING SYSTEM Figure 6-210 Figure 6-211 [13] [12] [10] [9] [10] [1 1] 7) Free the harness from the harness retainer [9]. 8) Remove the two mounting screws [10], and detach the heater support plate (rear) [11]. 9) Free the harness fr[...]

  • Page 160

    CHAPTER 6 FIXING SYSTEM 6–12 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) [2] [3] Figure 6-213 [1] Figure 6-216 [2] [1] Figure 6-214 [A] Figure 6-215 3) Remove the mounting screw [2], and detach the thermal switch assembly [3]. 6. Removing the Main Thermistor 1) Remove the fixing assembly. ([...]

  • Page 161

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 6–13 CHAPTER 6 FIXING SYSTEM Figure 6-218 [2] [3] Figure 6-217 [1] [2] [1] [3] [5] [4] [6] Figure 6-220 [8] [7] [9] [10] Figure 6-219 4) Remove the mounting screw [2]. 5) Free the harness from the harness guide, and remove the sub thermistor [3]. [...]

  • Page 162

    CHAPTER 6 FIXING SYSTEM 6–14 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Figure 6-224 [1] [1] [2] Figure 6-221 [1] [1] [2] [3] Figure 6-223 Figure 6-222 [1] [1] [2] 9. Removing the Fixing Lower Roller 1) Remove the fixing upper roller. (See p. 6- 13.) 2) Remove the bearing [1] and the fixin[...]

  • Page 163

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 6–15 CHAPTER 6 FIXING SYSTEM Figure 6-225 Table 6-201 Figure 6-226 Feeding direction a c A3 size Center of copy paper b [1] [1] b I a - c I Dimensions *Be sure both upper and lower rollers are sufficiently warm before taking measurements. 4.8 ± 0[...]

  • Page 164

    CHAPTER 6 FIXING SYSTEM 6–16 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) [2] [A] [1] Figure 6-227 Figure 6-230 [4] [3] [3] Figure 6-228 [5] [6] Figure 6-229 [2] [1] [1] B. Deliver y Assembl y 1. Removing the Upper Separation Claw 1) Remove the fixing assembly. (See p. 6-8.) 2) Remove the st[...]

  • Page 165

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 6–17 CHAPTER 6 FIXING SYSTEM Figure 6-232 [2] [1] [3] [1] [2] Figure 6-231 [4] [3] [4] [5] [6] [7] [7] [6] Figure 6-233 3) Detach the spring [3], and detach the lower separation claw [4]. 3. Removing the Delivery Roller 1) Remove the two tension s[...]

  • Page 166

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  • Page 167

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS C. Copyboard Glass ............................. 7-14 D. Fans .................................................. 7-15 E. Counter Assembly ............................ 7-18 F. Main Motor Assembly .............[...]

  • Page 168

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  • Page 169

    COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 7–1 CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS I. FANS The copier is equipped with three fans for cooling and discharging ozone. When a sorter is installed, the vent for the exhaust fan (FM2, FM4) is blocked, preventing discharge of ozone to the lef[...]

  • Page 170

    CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS 7–2 COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) The exhaust fan (FM2) and the sorter kit fan (FM5) are rotated at half speed during standby to prevent heating inside the machine. If the reading of the cleaner thermistor (TH3) is 50°C or more (38°C [...]

  • Page 171

    COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 7–3 CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS If the heat exhaust fan rotation detection signal (FM2ROT) is not detected 0.5 sec after the exhaust fan (FM2, FM4) starts to rotate, error code E805 will be indicated on the control panel.[...]

  • Page 172

    CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS 7–4 COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) II. PO WER SUPPL Y A. Outline of P ower Supply Figure 7-201 is a block diagram showing distribution of power inside the machine. Figure 7-201 Cassette/Drum heater Accessory cassette heater Mirror heater[...]

  • Page 173

    COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 7–5 CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS B. P ower Supply Cir cuitr y 1. AC Power Supply AC power is supplied to the power supply PCB when the power plug is connected and the front door switch (DS1) is turned on. 2. DC Power Supply The power s[...]

  • Page 174

    CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS 7–6 COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 3. Mirror Heater, Cassette/Drum Heater, and Accessory Cassette Heater The following three heaters are made available as accessories to the copier, designed to prevent condensation of the scanner and the[...]

  • Page 175

    COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 7–7 CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS C. Protection Mechanisms of the P o wer Supply Cir cuitr y The copier’s power supply PCB is equipped with a circuit breaker (CB1, CB2) and a fuse (FU1, FU2) on its AC input side. To protect against ov[...]

  • Page 176

    CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS 7–8 COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) III. DISASSEMBL Y/ASSEMBL Y The copier may be disassembled and assembled as shown here. Pay attention to the copier’s mechanical characteristics along with the steps for disassembly/assembly. Importan[...]

  • Page 177

    COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 7–9 CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS A. External Cover s [1] Front cover [2] Right door (5) [3] Upper right cover (2) [4] Right cover (2) [5] Rear cover (5) [6] Upper rear cover (4) [7] Upper left cover (2) [8] Delivery lower cover (2) [9][...]

  • Page 178

    CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS 7–10 COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Remove the appropriate covers as follows when cleaning, checking, or repairing the inside of the copier. Covers which may be detached by mere removal of mounting screws are omitted from the discussions[...]

  • Page 179

    COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 7–11 CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS Figure 7-306 [2] [1] Figure 7-307 [2] Figure 7-308 3. Removing the Upper Left Cover 1) Remove the copyboard glass. 2) Remove the two mounting screws [1], and detach the upper left cover [2]. 4. Removin[...]

  • Page 180

    CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS 7–12 COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 6. Removing the Lower Inside Cover 1) Remove the front door and the transfer charging assembly. 2) Slide out the registration knob [1] to the front. 3) Remove the mounting screw [2]. 4) Loosen the two [...]

  • Page 181

    COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 7–13 CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS [2] [1] [5] [3] [4] Figure 7-311 Figure 7-312 Figure 7-310 B. Contr ol P anel 1. Removing the Control Panel 1) Open the copyboard cover, and remove the two mounting screws [1]; then, detach the two ADF[...]

  • Page 182

    CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS 7–14 COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) [1] [2] Figure 7-313 Figure 7-314 [4] [5] [3] C. Copyboard Glass 1. Removing the Copyboard Glass 1) Remove the two mounting screws [1], and detach the glass retainer (right) [2]. 2) Slide the copyboard[...]

  • Page 183

    COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 7–15 CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS D . Fans 1. Removing the Scanner Cooling Fan 1) Remove the two mounting screws [1], and detach the filter [2]. [2] [1] [3] [4] Figure 7-316 Figure 7-315 2) Disconnect the connector [3], and remove the [...]

  • Page 184

    CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS 7–16 COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) [1] Figure 7-317 [2] [3] Figure 7-318 [4] [5] Figure 7-319 2. Removing the Exhaust Fan 1) Remove the developing assembly, drum unit, inside cover, and delivery upper cover. 2) Disconnect the two connec[...]

  • Page 185

    COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 7–17 CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS 3. Remove the Ozone Filter 1) Open the top unit. 2) Shift down the lever [1], and remove the ozone filter assembly [2]. 3) Remove the ozone filter [3]. [2] [1] Figure 7-320 [3] Figure 7-321[...]

  • Page 186

    CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS 7–18 COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) [4] [3] [5] [2] [1] Figure 7-322 [4] [2] [1] [3] Figure 7-323 E. Counter Assembly 1. Removing the Counter Assembly 1) Remove the control panel. 2) Remove the two mounting screws [1], and remove the mag[...]

  • Page 187

    COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 7–19 CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS G. DC Contr oller PCB 1. Removing the DC Controller PCB 1) Remove the delivery lower cover. 2) Disconnect all connectors of the DC controller PCB; then, free the harness from the harness guide. 3) Remo[...]

  • Page 188

    CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS 7–20 COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Figure 7-325 [4] [3] [1] [2] H. Remo ving the P ower Supply PCB 1. Removing the Power Supply PCB 1) Remove the rear cover. 2) Disconnect the fixing heater connector [1]. 3) Disconnect all connectors of[...]

  • Page 189

    COPYRIGHT © 1998 CANON INC. CANON NP7160/NP7161 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 7–21 CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS [2] [3] [1] Figure 7-327 J. Lamp Regulator PCB 1. Removing the Lamp Regulator PCB 1) Remove the rear cover. 2) Disconnect the two connectors [1] of the lamp regulator PCB. 3) Remove the three locking s[...]

  • Page 190

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  • Page 191

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 8 INSTALLATION This chapter introduces requirements for the site of installation, and shows how the copier may be installed using step-by-step instructions. I. SELECTING THE SITE ............................ 8-1 II. UNPACKING AND INSTALLATIO[...]

  • Page 192

    [...]

  • Page 193

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 8–1 CHAPTER 8 INSTALLATION I. SELECTING THE SITE Check the site of installation against the following requirements. If possible, visit the site in advance of the delivery of the machine. 1. There must be a dedicated power outlet for exclusive use [...]

  • Page 194

    CHAPTER 8 INSTALLATION 8–2 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Step Work Checks/remarks Open the shipping box, and take out the two cardboard boxes. 1 Check to make sure that none of the following is missing: • copy tray • power cord • drum unit • User’s Manual • waste t[...]

  • Page 195

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 8–3 CHAPTER 8 INSTALLATION B. Remo ving the Metal Fixings Step Work Checks/remarks Remove the packing tape, cushioning material, protective sheet of the copyboard glass, and protective sheet of the size index. Slide out the cassette, and remove th[...]

  • Page 196

    CHAPTER 8 INSTALLATION 8–4 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Turn the toner supply lever counterclockwise to unlock the developing assembly. Remove the thumb screw, and remove the dummy drum. (You will be using the thumb screw when mounting the drum unit. Store away the dummy drum[...]

  • Page 197

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 8–5 CHAPTER 8 INSTALLATION Fill out the label that came with the drum unit, and attach the label to the front cover of the drum unit. 5 Step Work Checks/remarks Turn the toner supply lever clockwise to lock the developing assembly in place; then, [...]

  • Page 198

    CHAPTER 8 INSTALLATION 8–6 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Clean the charging wire using the primary charging wire cleaning lever. 1 Clean the charging wire using the transfer charging wire leaning lever. 2 Clean as if to sweep the inside of the groove of the static eliminator. [...]

  • Page 199

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 8–7 CHAPTER 8 INSTALLATION Take out the dust-proofing glass (1 screw), and dry wipe it with lint-free paper. Then, mount it back to the copier. 5 Mount the inside cover. 6 Turn the toner supply lever counterclockwise to unlock the developing assem[...]

  • Page 200

    CHAPTER 8 INSTALLATION 8–8 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) E. Checking the Images/Operations and User Mode Connect the power cord to the copier, and connect the power plug to the outlet. 1 Step Work Checks/remarks • This mode lasts about 4 min. • While this mode is effective[...]

  • Page 201

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 8–9 CHAPTER 8 INSTALLATION Step Work Checks/remarks When drum unit installation mode has been executed, press the Reset key to end service mode. 7 While the toner is being stirred, perform the following: 1) Set the cassette size to suit the needs [...]

  • Page 202

    CHAPTER 8 INSTALLATION 8–10 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) F . Supplying T oner Open the front door. 1 Holding the toner cartridge horizontal, shake it left and right several times. 4 Put the toner cartridge over the developing assembly, and push it in fully to the rear. 5 Hold[...]

  • Page 203

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 8–11 CHAPTER 8 INSTALLATION The toner cartridge will detach itself from the developing assembly when the grip of the developing assembly is pushed in to its initial position. Slide the developing assembly into the copier, and turn the toner supply[...]

  • Page 204

    CHAPTER 8 INSTALLATION 8–12 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Make a copy in Direct. Take out all copy paper from the cassette. Excute ‘403’ in service mode. The scanner, lens, and No.4/No.5 mirror unit move to the position for transportation. Turn off the power switch, and di[...]

  • Page 205

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 8–13 CHAPTER 8 INSTALLATION Figure 8-402 Figure 8-403 3) Lead out the harness, and disconnect the shorting connector [4]; then, connect the connector [5] of the Control Card IV N to the copier’s connector [6]. 4) Push in the harness and the conn[...]

  • Page 206

    CHAPTER 8 INSTALLATION 8–14 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) V . INST ALLING THE REMO TE DIA GNOSTIC DEVICE II Keep the following in mind when installing the Remote Diagnostic Device II to the copier: 1. Be sure to observe the relevant laws and regulations of the country. 2. Be s[...]

  • Page 207

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 8–15 CHAPTER 8 INSTALLATION [1] [1] [2] [4] [3] Figure 8-502 Figure 8-501 [5] [6] Figure 8-503 1) Remove the two screws [1], and detach the top cover [2]. 2) Connect the connector [3] of the power supply unit to the connector [4] as shown. 3) Remo[...]

  • Page 208

    CHAPTER 8 INSTALLATION 8–16 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) [11] [7] [8] Figure 8-504 Figure 8-506 Figure 8-505 4) Lead the harness through the opening in the rear cover made by cutting off the face plate in step 3), and connect the connector [7] and the copier’s connector [8][...]

  • Page 209

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 8–17 CHAPTER 8 INSTALLATION LED1 LED2 LED3 2 1 LED5 LED6 LED4 IC6 SW1 SW4 SW3 6 1 BAT1 CN4 1 2 CN3 CN2 12345678 [12] SW2 Figure 8-507 LED1 LED2 LED3 2 1 LED5 LED6 LED4 IC6 SW1 SW4 SW3 6 1 BAT1 CN4 1 2 CN3 CN2 12345678 SW2 [13] [14] Setting AII OFF[...]

  • Page 210

    CHAPTER 8 INSTALLATION 8–18 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) LED1 LED2 LED3 2 1 LED5 LED6 LED4 IC6 SW1 SW4 SW3 6 1 BAT1 CN4 1 2 CN3 CN2 SW2 [16] Figure 8-510 LED1 LED2 LED3 2 1 LED5 LED6 LED4 IC6 SW1 SW4 SW3 6 1 BAT1 CN4 1 2 CN3 CN2 12345678 SW2 [17] [18] [19] SW2 bits SW2-1 SW2-[...]

  • Page 211

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 8–19 CHAPTER 8 INSTALLATION LED1 LED2 LED3 2 1 LED5 LED6 LED4 IC6 SW1 SW4 SW3 6 1 BAT1 CN4 1 2 CN3 CN2 12345678 SW2 [17] [18] [19] Figure 8-512 LED1 LED2 LED3 2 1 LED5 LED6 LED4 IC6 SW1 SW4 SW3 6 1 BAT1 CN4 1 2 CN3 CN2 12345678 SW2 [20] Figure 8-5[...]

  • Page 212

    CHAPTER 8 INSTALLATION 8–20 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) LED1 LED2 LED3 2 1 LED5 LED6 LED4 IC6 SW1 SW4 SW3 6 1 BAT1 CN4 1 2 CN3 CN2 SW2 [22] [21] Figure 8-514 LED1 LED2 LED3 2 1 LED5 LED6 LED4 IC6 SW1 SW4 SW3 6 1 BAT1 CN4 1 2 CN3 CN2 SW2 [23] Figure 8-515 14) Connect the tele[...]

  • Page 213

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 8–21 CHAPTER 8 INSTALLATION LED1 LED2 LED3 2 1 LED5 LED6 LED4 IC6 SW1 SW4 SW3 6 1 BAT1 CN4 1 2 CN3 CN2 SW2 [18] [24] [25] Figure 8-516 17) Check if the device is capable of ringing up the computer at the service station. Press the push switch [18][...]

  • Page 214

    CHAPTER 8 INSTALLATION 8–22 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 20) Attach the switch settings label [28] on the device, and record the settings of each switch. 21) Secure the top cover [29] in place with two screws [30]. At this time, check to make sure that the cable is fixed in p[...]

  • Page 215

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 8–23 CHAPTER 8 INSTALLATION [1] [2] Figure 8-601 Figure 8-602 [3] [4] Figure 8-603 VI. INST ALLING THE ACCESSOR Y COUNTER 1) Open the front door; then, remove the inside cover, and cut off the face plate [1]. 2) Remove the delivery lower cover, an[...]

  • Page 216

    CHAPTER 8 INSTALLATION 8–24 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) SW102-5 OFF ON OFF ON OFF Accessory counter not connected. Uses the accessory counter as a small-size copy counter. Uses the accessory counter as a large-size copy counter. Not used OFF ON ON SW102-6 Settings Table 8-60[...]

  • Page 217

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 8–25 CHAPTER 8 INSTALLATION Figure 8-701 VII. INST ALLING THE ACCESSOR Y HEA TER A. Installing the Heater Switch 1) Remove the rear cover, and cut off the face plate [1]. [1] Figure 8-702 [2] [3] 2) Mount the heater switch [2] with two screws [3].[...]

  • Page 218

    CHAPTER 8 INSTALLATION 8–26 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) B. Mounting the Cassette/ Drum Heater 1) Remove the front door, drum unit, developing assembly, transfer charging assembly, and cassette. 2) Engage the two hooks [1] of the cassette/ drum heater on the cut-off, and slid[...]

  • Page 219

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 8–27 CHAPTER 8 INSTALLATION [2] [1] C. Installing the Mirror Heater 1) Mount the inside cover and the delivery upper cover. 2) Mount the mirror heater [1] with two screws [2]. 3) Lead the mirror heater harness [3] through the harness guide, and co[...]

  • Page 220

    [...]

  • Page 221

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 9 MAINTENANCE AND SERVICING I. PERIODICALLY REPLACED PARTS ..... 9-1 A. Copier ................................................. 9-1 II. CONSUMABLES AND DURABLES ........ 9-2 A. Copier ................................................. 9-2 II[...]

  • Page 222

    [...]

  • Page 223

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 9–1 CHAPTER 9 MAINTENANCE AND SERVICING I. PERIODICALL Y REPLA CED PARTS Some of the parts of the copier need to be replaced on a periodical basis to ensure a specific level of performance (regardless of external appearance or presence/absence of [...]

  • Page 224

    CHAPTER 9 MAINTENANCE AND SERVICING 9–2 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) II. CONSUMABLES AND DURABLES Some of the parts of the copier may need to be replaced once or more because of wear or damage over the period of machine warranty. Replace them when they fail. A. Copier Parts n[...]

  • Page 225

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 9–3 CHAPTER 9 MAINTENANCE AND SERVICING III. SCHEDULED SER VICING CHART Note: 1. As a rule, provide scheduled servicing every 60,000 copies. 2. Before setting out for a visit, check the Servicing Book, and take parts for which replacement is expec[...]

  • Page 226

    CHAPTER 9 MAINTENANCE AND SERVICING 9–4 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10 11 12 13 14 15 Clean the copyboard cover and the copyboard glass. Make test copies. Make sample copies. Put the sample copies in order, and clean up the area around the machine. Record the latest counter [...]

  • Page 227

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 9–5 CHAPTER 9 MAINTENANCE AND SERVICING IV . SCHEDULED SER VICING TABLE A. Copier Caution: 1. Do not use solvents/oils other than those mentioned herein. 2. Keep the following in mind when cleaning/checking each charging assembly: • Do not use a[...]

  • Page 228

    CHAPTER 9 MAINTENANCE AND SERVICING 9–6 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Others Transfer charging wire Static eliminator Unit Item Remarks every 60,000 every 120,000 every 180,000 yearly Intervals[...]

  • Page 229

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING This chapter provides tables of maintenance/inspection, standards/adjustments, and identification of problems (image fault/malfunction). A. Sensors and Switches ................... 10-70 B. Motors, Fans, Clutches, and Sole[...]

  • Page 230

    [...]

  • Page 231

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING 10–1 I. GUIDE T O TR OUBLESHOO TING TABLES The troubleshooting tables in this chapter are based on more commonly used troubleshooting flow charts. Study the following for an idea of how you may take advantage of the tabl[...]

  • Page 232

    CHAPTER 10 TROUBLESHOOTING COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–2 YES NO Yes/No Actions Connect the power plug. Is the power plug connected to the power outlet? Checks Rest omitted Step 1 YES NO Close the door properly. Is the front door closed properly? 2 YES NO This is not the c[...]

  • Page 233

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–3 Pre-Checks Density Slope Adjustment Solid Black Density Adjustment Optimum Exposure Adjustment Clean the charging wires. Is there a difference in density between front and rear? Make two to three copies of the Test Sheet (NA-3). Make a copy. [...]

  • Page 234

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–4 B. P oints to Note for Scheduled Servicing Part Lens Blower brush Cleaning Copyboard glass Alcohol Cleaning Scanner rail Lubricant Lubricate Reflecting plate Blower brush Cleaning No. 1 to 3 mirrors Blower brush; or, alcohol and lint-free pap[...]

  • Page 235

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING 10–5 II. ST AND ARDS AND ADJUSTMENTS A. Mechanical 1. Leading Edge Non-Image Width (blank exposure lamp off timing) Select No. 306 in service mode. Make adjustments so that non-image width on copies made of the Test Shee[...]

  • Page 236

    CHAPTER 10 TROUBLESHOOTING COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–6 [3] [1] [2] Figure 10-203 0 2 4 6 8 10 (-) (+) Figure 10-204 3. Left/Right Registration (cassette) Make adjustments by moving the horizontal registration adjusting screw of the cassette so that the distance between [...]

  • Page 237

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING 10–7 B. Exposure System 1. Routing the Scanner Drive Cable Route the cable following steps [1] through [7], and perform the steps under “Adjusting the Tension of the Cable” and “Adjusting the Position of the Mirror[...]

  • Page 238

    CHAPTER 10 TROUBLESHOOTING COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–8 2. Adjusting the Position of the Mirror Be sure to adjust the position of the mirror as follows after you have mounted the scanner drive cable. 1) Keep the mirror positioning tool nearby. Arrange the mirror position[...]

  • Page 239

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING 10–9 3. Adjusting the Tension of the Scanner Drive Cable Be sure to adjust the tension as follows after routing the scanner drive cable. 1) Move the scanner to home position. 2) Pull the center of the scanner drive cable[...]

  • Page 240

    CHAPTER 10 TROUBLESHOOTING COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–10 C. Image Formation System 1. Outline As many as two charging wires are located around the photosensitive drum. (These charging wires are 0.06 mm in diameter.) 2. Stringing the Charging Wires Basically, all charging[...]

  • Page 241

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING 10–11 3) Remove the spring [6], and remove the charging wire [7]. To remove the transfer charging assembly, remove the spring [e], and remove the charging wire [f]. • Primary Charging Assembly Figure10-212a • Transfe[...]

  • Page 242

    CHAPTER 10 TROUBLESHOOTING COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–12 Figure 10-215 11) Mount the sheet (front) and the sheet (rear). 12) Mount the stopper and the grid plate. For the transfer charging assembly, mount the guide wire plate. 10) Wipe the charging wire with lint-free pa[...]

  • Page 243

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING 10–13 • Transfer Charging Assembly • Primary Charging Assembly Figure 10-217 Height adjusting screw Height adjusting screw Height adjusting screw Height adjusting screw Figure 10-218b Figure 10-218a 3. Adjusting the [...]

  • Page 244

    CHAPTER 10 TROUBLESHOOTING COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–14 Figure 10-219 Figure 10-220 •AB •INCH [1] [2] [1] [2] 2. Changing the Cassette Size (AB/INCH) 1) Slide out the cassette. 2) Loosen the mounting screw [1] on the left side of the cassette; then, slide the size s[...]

  • Page 245

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING 10–15 3) Remove the mounting screw [3]; then, slide the size switching lever [4] to the desired size position, and fix it in place. Figure 10-221 [3] [4] [3] [4] •AB •INCH[...]

  • Page 246

    CHAPTER 10 TROUBLESHOOTING COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–16 E. Fixing System 1. Adjusting the Height of the Fixing Assembly Inlet Guide 1) Loosen the two adjusting screws [1], and adjust the height of the fixing assembly inlet guides [2]. [1] [1] [2] 2. Adjusting the Pressu[...]

  • Page 247

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING 10–17 Caution: a and c represent points 10 mm from both ends of copy paper. Figure 10-224 Feeding direction a c A3 size Center of copy paper b b I a - c I Dimensions *Be sure both upper and lower rollers are sufficiently[...]

  • Page 248

    CHAPTER 10 TROUBLESHOOTING COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–18 F . Electrical System 1. Obtaining Optimum Exposure You can adjust the intensity of the scanning lamp (LA1) at F5 as follows (effective for both AE and manual): 1) Set the setting of ‘U12’ (density correction) [...]

  • Page 249

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING 10–19 2. AE Adjustment If copies of a newspaper are foggy or if you have replaced the scanning lamp (LA1), AE sensor, or DC controller PCB, perform the following: (Be sure that the image is an optimum image before starti[...]

  • Page 250

    CHAPTER 10 TROUBLESHOOTING COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–20 b. AE Scanning Intensity Adjustment If an optimum image cannot be obtained by executing ‘301’ (AE auto adjustment) in service mode, perform the following: 1) Place a white background original on the copyboard g[...]

  • Page 251

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING 10–21 c. AE Slope Adjustment If an optimum image cannot be obtained by executing ‘301’ (AE auto adjustment) in service mode, perform the following: 1) Place a newspaper on the copyboard glass, and select AE and Direc[...]

  • Page 252

    CHAPTER 10 TROUBLESHOOTING COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–22 3. After Replacing the DC Controller PCB 1) Set the DIP switch (SW102) on the new DC controller PCB so that its settings are the same as the old DC controller PCB. 2) Mount the new DC controller PCB. 3) Press the U[...]

  • Page 253

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING 10–23 4. Checking the Photointerrupters The copier allows you to use its service mode when checking its photointerrupters. (You may also use a conventional meter.) a. Using a Meter 1) Put the copier in standby state. 2) [...]

  • Page 254

    CHAPTER 10 TROUBLESHOOTING COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–24 Sensor PS1 Scanner home position sensor PS2 Lens home position sensor PS3 Mirror home position sensor PS4 Cassette paper sensor PS5 Registration paper sensor PS6 Delivery paper sensor PS7 Multi paper sensor PS8 Was[...]

  • Page 255

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING 10–25 III. IMA GE FA UL TS A. Initial Checks 1. Checking the Site Environment a. The power outlet must be exclusive, and must provide the rated voltage. (The power plug must remain connected throughout day and night.) b.[...]

  • Page 256

    CHAPTER 10 TROUBLESHOOTING COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–26 4. Checking the Charging Assembly a. Check each charging assembly for soiling and a fault on its charging wire (scratches). b. Clean the charging wire and shield plate of each charging assembly. (If dirt cannot be [...]

  • Page 257

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING 10–27[...]

  • Page 258

    CHAPTER 10 TROUBLESHOOTING COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–28 B. Image Fault Samples not available[...]

  • Page 259

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING 10–29 Step Checks Actions 1 2 3 4 5 End. End. Check the developing assembly locking lever. Check the developing assembly. End. Replace the DC controller PCB. Cause Perform the Image Adjustment Basic Procedure. Is the pro[...]

  • Page 260

    CHAPTER 10 TROUBLESHOOTING COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–30 1 2 3 4 5 6 7 8 9 Perform the Image Adjustment Basic Procedure. Is the problem corrected? Turn off the power switch in the middle of copying operation. Then, open the front door, and open the top unit. Is the toner[...]

  • Page 261

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING 10–31 4. The copy has uneven density. (front side dark) 5. The copy has uneven density. (front side light) Developing assembly Scanner Pre-scanning lamp (LA2) Developing assembly Charging assembly, Copy paper 1 2 3 4 5 P[...]

  • Page 262

    CHAPTER 10 TROUBLESHOOTING COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–32 6. The copy is foggy. (overall) Scanner Pre-exposure lamp (LA2), DC controller PCB Developing roll Developing cylinder Scanner lamp (LA1) High-voltage power supply PCB Lamp regulator PCB DC controller PCB 1 2 3 4 5[...]

  • Page 263

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING 10–33 7. The copy is foggy. (vertical) 8. The copy has black lines. (vertical, fuzzy, thick) Primary charging assembly Scanner Pre-exposure lamp (LA2) Developing assembly Fixing assembly 1 2 3 4 Clean the primary chargin[...]

  • Page 264

    CHAPTER 10 TROUBLESHOOTING COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–34 10. The copy has white spots. (vertical) 11. The copy has white lines. (vertical) Fixing assembly Primary charging assembly Developing assembly Copy paper Photosensitive drum Blank exposure lamp (LA3), DC controlle[...]

  • Page 265

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING 10–35 12. The copy has white spots. (vertical) Developing assembly Photosensitive drum Copy paper Scanner rail, Scanner cable Charging wire 1 2 3 4 Is the problem noted at intervals of about 3.2 cm? (scratch on the devel[...]

  • Page 266

    CHAPTER 10 TROUBLESHOOTING COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–36 13. The back of the copy is soiled. Developing assembly Drum cleaner assembly Fixing assembly Delivery assembly 1 2 3 Turn off the power switch while the copy paper is moving through the feeding assembly. At this t[...]

  • Page 267

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING 10–37 14. The copy has faulty fixing. Fixing roller (upper/ lower) Fixing heater (H1) Fixing lower heater pressure Copy paper 1 2 3 Is the problem noted vertically? Does the fixing heater (H1) turn on immediately after p[...]

  • Page 268

    CHAPTER 10 TROUBLESHOOTING COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–38 15. 16. The copy has a displaced leading edge. 17. Original page Copy paper Pick-up roller Leading edge margin Registration clutch (CL1), Registration roller DC controller PCB 1 2 3 4 5 6 Is the original page place[...]

  • Page 269

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING 10–39 18. The copy has a blurred image. Scanner cable Scanner rail Photosensitive drum Developing gear Drum drive system 1 2 3 4 Does the cable wind on the cable pulley in layers while the scanner is moving? Move the No.[...]

  • Page 270

    CHAPTER 10 TROUBLESHOOTING COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–40 20. The copy has poor sharpness. Copyboard glass Mirror Scanner Lens drive assembly, No. 4/No. 5 mirror drive assembly Photosensitive drum 1 2 3 4 Is the copyboard glass soiled with oil or the like? Is the horizont[...]

  • Page 271

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING 10–41 21. The copy is blank. Drum unit Developing assembly Primary charging assembly Developing assembly DC controller PCB Scanning lamp (LA1) Connector High-voltage cord High-voltage power supply (primary/ transfer) 1 2[...]

  • Page 272

    CHAPTER 10 TROUBLESHOOTING 10–42 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Main thermistor (TH1) Sub thermistor (TH2) Thermistor (TH1, TH2) Thermistor (TH1, TH2) Operating environment DC controller PCB Execute service mode ‘412’ (error clear) to clear E000. Open the front door and the[...]

  • Page 273

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING 10–43 2. E001 Thermistor (TH1, TH2) DC controller PCB Triac DC controller PCB 1 2 3 Execute service mode ‘412’ (error clear) to clear E001. Open the front door and the top unit, and let the fixing roller cool suffici[...]

  • Page 274

    CHAPTER 10 TROUBLESHOOTING 10–44 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 3. E002/E003 1 2 3 4 5 6 Execute service mode ‘412’ (error clear) to clear E002 or E003. Open the front door and the top unit, and let the fixing roller cool sufficiently. Turn on the power switch. Does any of [...]

  • Page 275

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING 10–45 4. E004 Fixing heater (H1) Triac DC controller PCB 1 2 NO YES NO Execute service mode ‘412’ (error clear) to clear E004. Turn on the power switch. Does the fixing heater turn on? Replace the power supply PCB. I[...]

  • Page 276

    CHAPTER 10 TROUBLESHOOTING 10–46 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 6. E013 Waste toner feeding screw Waste toner feeding screw locked sensor (PS8) DC controller PCB 1 2 NO NO YES Is the flag of the waste toner feeding screw locked sensor rotating when the main motor is rotating? I[...]

  • Page 277

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING 10–47 8. E031 Accessory counter (CNT2) Accessory counter (CNT2) DC controller PCB 1 2 NO YES NO Turn off the power switch, and disconnect J102 from the DC controller PCB. Set the meter range to 1 K Ω , and connect the [...]

  • Page 278

    CHAPTER 10 TROUBLESHOOTING 10–48 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10. E208 Mirror home position sensor (PS3) DC controller PCB 1 2 NO NO YES Does the mirror move when the power switch is turned on? Is the mirror home position sensor normal? (See the instructions on how to check t[...]

  • Page 279

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING 10–49 12. E220 Lamp regulator PCB DC controller PCB 1 2 YES NO YES Does the scanning lamp (LA1) remain off? Set the meter range to 30 VDC, and connect the probes to J211-2 (+) and J211-1 (-) on the DC controller PCB. Is [...]

  • Page 280

    CHAPTER 10 TROUBLESHOOTING 10–50 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 15. E712 Malfunction Connector ADF PCB DC controller PCB 1 2 3 YES NO YES NO Turn off and then on the power switch. Is the problem corrected? Is the connector (J754) used between the ADF and the copier connected se[...]

  • Page 281

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING 10–51 17. E800 Malfunction Power supply PCB DC controller PCB 1 2 YES YES NO Turn off and then on the power switch. Is the problem corrected? Replace the power supply PCB. Is the problem corrected? End. End. Check the wi[...]

  • Page 282

    CHAPTER 10 TROUBLESHOOTING 10–52 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 20. AC power is absent. 1 2 3 4 5 6 7 8 9 10 11 12 NO NO NO NO YES YES YES NO YES NO NO NO YES NO Is the power cord connected to the copier? Is the power plug connected to the power outlet? Is the rated AC voltage [...]

  • Page 283

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING 10–53 21. DC power supply is absent. AC power supply Fuse (power supply PCB) Wiring, DC load Power supply PCB 1 2 3 NO YES YES NO Is the rated voltage present between J204-1 and J204-3 on the DC power supply PCB? Is the [...]

  • Page 284

    CHAPTER 10 TROUBLESHOOTING 10–54 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 22. The scanner fails to move. Belt, Cable Scanner path Scanner motor (M2) DC controller PCB 1 2 3 NO NO YES NO Are the scanner drive belt and cable routed correctly? Is the scanner rail free of soiling and object,[...]

  • Page 285

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING 10–55 Step Checks Actions 1 2 3 NO NO YES NO Cause 23. The lens fails to move. Yes/No Bolt Lens path Lens motor (M3) DC controller PCB Is the lens drive belt routed correctly? Is the lens path free of dirt and foreign ob[...]

  • Page 286

    CHAPTER 10 TROUBLESHOOTING 10–56 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 25. The scanning lamp fails to turn on. 1 2 3 4 5 NO NO NO YES NO NO Is the scanning lamp mounted correctly? Disconnect the power plug from the power outlet, and remove the thermal fuse. Is there electrical continu[...]

  • Page 287

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING 10–57 26. The pre-exposure lamp fails to turn on. Pre-exposure lamp (LA2) DC controller PCB 1 YES NO Set the meter range to 30 VDC, and connect the probes to J104-A6 (+) and J104-7 (-) on the DC controller PCB. Does the [...]

  • Page 288

    CHAPTER 10 TROUBLESHOOTING 10–58 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 28. Pick-up fails. (cassette) 1 2 3 4 5 6 NO NO YES YES NO NO YES Actions Checks Step Cause Yes/No Copy paper Right door Pick-up roller Registration clutch (CL1), Feeding clutch (CL2) Pick-up solenoid (SL1) DC cont[...]

  • Page 289

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING 10–59 YES YES NO YES NO Yes/No 29. Pick-up operation fails. (multifeeder) Multifeeder solenoid (SL2) DC controller PCB Multifeeder roller clutch (CL3) DC controller PCB 1 2 3 Is the leading edge of copy paper as far as t[...]

  • Page 290

    CHAPTER 10 TROUBLESHOOTING 10–60 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 31. The fixing heater fails to turn on. Thermal switch (TSW1) Fixing heater (H1) DC controller PCB Wiring 1 2 3 NO NO NO YES Turn off the power switch, and remove the fixing assembly. Set the meter range to “ Ω[...]

  • Page 291

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING 10–61 33. The Add Toner indicator fails to turn off. Connector Toner sensor (TS1) DC controller PCB 1 2 3 YES NO YES NO Open and close the front door. Does it turn off? Are the connector J15 of the toner sensor, relay co[...]

  • Page 292

    CHAPTER 10 TROUBLESHOOTING 10–62 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 35. The Waste Toner Box Full indicator fails to turn off. Waste toner box Waste toner box Connector Waste toner sensor DC controller PCB 1 2 3 4 5 NO YES YES NO YES NO Is the waste toner box mounted? Is the waste t[...]

  • Page 293

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING 10–63 37. The Add Paper indicator fails to turn off. Cassette Sensor (PS4, PS7) DC controller PCB 1 2 NO NO YES Is the cassette set correctly? Are the following sensors normal? (See the instructions on how to check the p[...]

  • Page 294

    CHAPTER 10 TROUBLESHOOTING 10–64 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 39. The Jam indicator fails to turn off. Sensor DC controller PCB 1 2 3 NO YES NO Has all paper been removed from inside the copier? Execute service mode ‘101’ (jam type display) to find out which sensor detect[...]

  • Page 295

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING 10–65 41. The Set Control Card indicator fails to turn off. Control card DC controller PCB Control Card IV N 1 2 YES YES NO Is the Control Card set correctly? Can copies be made? Set the control card correctly. Replace t[...]

  • Page 296

    CHAPTER 10 TROUBLESHOOTING 10–66 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) V . TR OUBLESHOO TING FEEDING PR OBLEMS A. Copy Jams The copier may be divided into the following in terms of where copy paper tends to jam. [1] Pick-up/feeding assembly [2] Fixing/delivery assembly The instruction[...]

  • Page 297

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING 10–67 1. Pick-Up/Feeding Assembly 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 NO NO YES YES YES NO YES YES YES NO YES NO YES NO YES NO Does the jam occur when paper is picked up from the cassette? Is the cassette set in the copi[...]

  • Page 298

    CHAPTER 10 TROUBLESHOOTING 10–68 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 2. Fixing/Delivery Assembly Cause Step Checks Actions Separation claw (delivery assembly) 1 2 3 4 5 6 7 8 YES YES YES NO YES NO NO NO YES 1. Replace the separation claw. 2. If dirt is found, clean it. Replace the r[...]

  • Page 299

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING 10–69 B. Faulty Feeding 1. Double Feeding 1 2 YES NO YES NO Is the separation pad deformed, worn, or soiled? Is the separation roller deformed, worn, or soiled? Replace the separation pad. Push up the separation pad, and[...]

  • Page 300

    CHAPTER 10 TROUBLESHOOTING 10–70 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) VI. ARRANGEMENT AND FUNCTIONS OF ELECTRICAL PAR TS A. Sensors and Switches Figure 10-601 PS11 PS7 PS4 PS5 PS6 PS9 PS10 TS1 PS1 DS1 SW1 PS8 PS2 PS3[...]

  • Page 301

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–71 CHAPTER 10 TROUBLESHOOTING Symbol Name Notation Description Toner sensor Photointerrupter Switch TS1 PS1 PS2 PS3 PS4 PS5 PS6 PS7 PS8 PS9 PS10 PS11 SW1 DS1 Developing assembly toner level detection Scanner home position detection Lens home po[...]

  • Page 302

    CHAPTER 10 TROUBLESHOOTING 10–72 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Figure 10-602 B. Motors, Fans, Clutches, and Solenoids SL2 SL1 CL3 CL2 M4 M2 M1 CL1 FM1 FM2 FM4 FM5 M3[...]

  • Page 303

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–73 CHAPTER 10 TROUBLESHOOTING Symbol Name Notation Description Motor Fan Clutch Solenoid M1 M2 M3 M4 FM1 FM2 FM4 FM5 CL1 CL2 CL3 SL1 SL2 Main drive Scanner drive Lens drive No. 4/No. 5 mirror drive Cooling Heat discharge Heat discharge Heat dis[...]

  • Page 304

    CHAPTER 10 TROUBLESHOOTING 10–74 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) Figure 10-603 C. Heaters, Lamps, and Others RL1 TH3 TH2 TH1 TP1 VZ1 H1 H2 H3 LA3 LA2 LA1 FU1 CNT1 CNT2[...]

  • Page 305

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–75 CHAPTER 10 TROUBLESHOOTING Symbol Name Notation Description H1 H2 H3 LA1 LA2 LA3 CNT1 CNT2 RL1 FU1 TSW1 TH1 TH2 TH3 VZ1 Fixing heater Cassette/drum heater (accessory) Mirror heater (accessory) Scanning lamp Pre-exposure lamp Blank exposure l[...]

  • Page 306

    CHAPTER 10 TROUBLESHOOTING 10–76 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) D . PCBs 4 6 5 9 1 8 2 7 3 Figure 10-604 Ref. Description Sequence control Control key/control display Original density detection Scanning lamp on voltage control Power supply High-voltage output Waste toner full d[...]

  • Page 307

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–77 CHAPTER 10 TROUBLESHOOTING E. V ariable Resistors, Light-Emitting Diodes, and Chec k Pins by PCB Of the variable resistors (VR), light-emitting diodes (LD), and check pins used in the copier, those needed for servicing work in the field are [...]

  • Page 308

    CHAPTER 10 TROUBLESHOOTING 10–78 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) A-configuration (2R2E) Ratio 200% A4 → A3 A3 → A4 50% 200.0% 141.4% 100% 100.0% 70.7% 50.0% Inch-configuration (4R3E) Ratio 200% LTR → 11" × 17" LGL → 11" × 17" 100% LGL → LTR 11&quo[...]

  • Page 309

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–79 CHAPTER 10 TROUBLESHOOTING Table 10-608 Table 10-609 AB/Inch-configuration (4R4E) Ratio 200% A4/LTR → A3, B5 → B4 A4/LTR → B4 A3 → B4, A4/LTR → B5 B4 → A4/LTR A3 → A4/LTR, B4 → B5 50% 200.0% 141.4% 122.4% B4 → A3, B5 → A4[...]

  • Page 310

    CHAPTER 10 TROUBLESHOOTING 10–80 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 2. Power Supply PCB J503 5 1 1 6 J501 VR1 VR2 Figure 10-606 Figure 10-607 3. Lamp Regulator PCB 1 4 J209 1 5 J208 J211 71 10 1 J210 J212 1 3 J204 4 1 J206 21 J203[...]

  • Page 311

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–81 CHAPTER 10 TROUBLESHOOTING 4. High-Voltage Power Supply PCB J305 J302 3 1 2 1 J303 4 1 J304 2 1 J301 10 1 VR82 VR141 J306 VR52 3 1 VR83 VR81 VR52 Figure 10-608[...]

  • Page 312

    10–82 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING VII. SER VICE MODE A. Outline The copier’s service mode is divided into the following seven: Table 10-701 DISPLAY Description No. [ 1 ] I/O DISPLAY [ 2 ] ADJUST [ 3 ] FUNCTION [ 4 ] OPTION [ 5 ] COUNTER [ 6 ] APP[...]

  • Page 313

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–83 CHAPTER 10 TROUBLESHOOTING C. Using Adjust Mode and Function Mode In adjust mode and function mode, the copier stores the settings made on the control panel in the RAM on the DC controller PCB and use them to simulate the functions of conven[...]

  • Page 314

    10–84 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING Indicates the type of jam. (See Table 10-702.) Indicates the code of the fan that caused E805. “01: exhaust fan at rear (FM2) “02: exhaust fan at fount (FM4) “03: sorter kit fan (FM5) Indicates the most recen[...]

  • Page 315

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–85 CHAPTER 10 TROUBLESHOOTING Indicates the release number of the ROM of the ADF. Indicates the type of jam in the sorter. Indicates the tray warning for the sorter. Indicates the stapling alarm for the sorter. Indicates the version of the ROM [...]

  • Page 316

    10–86 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING Guide to ADF Jam History (No. 115) and ADF Jam Type (No. 117) • The type of jam is indicated using the following codes in the 10’s and 1’s places. In the case of the history, the number corresponding to the k[...]

  • Page 317

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–87 CHAPTER 10 TROUBLESHOOTING Guide to Sorter Tray Warning (No. 122) Description Code 01 02 03 04 05 06 07 08 09 0A Stapler down Staple Stapler safety protection Edging fault Stapling overstacking Staple stacking limit Mixed paper sizes (breadt[...]

  • Page 318

    10–88 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING No. Description Remarks 201 202 203 204 205 206 207 208 209 216 219 220 221 222 223 224 225 Not used. Indicates digit 4. Indicates digit 5. Indicates digit 6. Indicates digit 7. Indicates the voltage of the fixing [...]

  • Page 319

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–89 CHAPTER 10 TROUBLESHOOTING Guide to Nos. 202, 203, 204, 205, 219, 220, 222, and 223 1a 1g 1b 1c 1f 1e 1d 2a 2b 2c 2d Figure 10-702 Detects the presence/absence of the total copy counter. ON: present. Description Connector Notation Signal Rem[...]

  • Page 320

    10–90 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING Table 10-709b Description Connector Notation Signal Remarks No. LED DSW102-1 setting ON: on. 205 1a DSW102-2 setting ON: on. 1b DSW102-3 setting ON: on. 1c DSW102-4 setting ON: on. 1d DSW102-8 setting ON: on. 2a ?[...]

  • Page 321

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–91 CHAPTER 10 TROUBLESHOOTING Table 10-709c Description Connector Notation Signal Remarks No. LED Waste toner box full detection Main heater triac short circuit detection ON: full. 222 1a ON: on. 1b – – 1c Scanning lamp on detection ON: on.[...]

  • Page 322

    10–92 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING F . Adjust Mode [3] • To select an item, use the keypad. • To execute an item, press the Start key. • To change a setting, use the keypad or the +/- Zoom key. • To enter a value, press the Start key. • To[...]

  • Page 323

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–93 CHAPTER 10 TROUBLESHOOTING 450 – 660 (120V model) 0 – 390 (230V model) 0 – 200 0 – 400 0 – 3 0 – 3 0 – 999 0 – 999 No. Description Remarks Settings 326 327 328 329 330 331 332 Adjusts the activation voltage of the scanning la[...]

  • Page 324

    10–94 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING Stirs toner. Releases the multifeeder holding plate. Drum unit installation mode. Execute this mode at the time of drum unit installation or replacement. Checks the fixing nip. Checks the activation of the scanning[...]

  • Page 325

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–95 CHAPTER 10 TROUBLESHOOTING See Table 10-710. See Table 10-710. 0: Disable drum cleaning (standard). 1: Execute drum cleaning for every 50 copies (standard in Chinese mode). 2: Execute drum cleaning for every 25 copies. 3: Execute drum cleani[...]

  • Page 326

    10–96 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING 0: Make a retry (standard). Indicates the Jam message in response to the second registration delay jam. 1: Do not make a retry. Indicates the Jam message in response to the first registration delay jam. 0: Incremen[...]

  • Page 327

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–97 CHAPTER 10 TROUBLESHOOTING No. Description Remarks 601 602 603 604 605 606 Large copy counter Small copy counter Total copy counter ADF large original page counter ADF small original page counter Count clear A press on the Start key will ini[...]

  • Page 328

    10–98 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING J. Application Mode [7] • To select an item, use the keypad. • To execute an item, use the Start key. • To change the value, use the keypad or the + and - Zoom keys. • To store settings, use the Start key. [...]

  • Page 329

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–99 CHAPTER 10 TROUBLESHOOTING VIII. SELF DIA GNOSIS The microprocessor on the copier’s DC controller PCB is equipped with a function that checks the condition of the machine (especially the condition of sensors). It runs checks at such times [...]

  • Page 330

    10–100 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING • The main motor lock detection signal (MM_LKDT*) is detected for 1 sec continuously while the main motor is being driven. • The waste toner feedscrew lock detection signal (TRQMLDT) does not switch for 0.5 se[...]

  • Page 331

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–101 CHAPTER 10 TROUBLESHOOTING • IC114 (IPC) on the DC controller PCB cannot be initialized at power -on. • An IPC communication error has been detected twice or more within 1 sec at power-on. • A communication error with the ADF controll[...]

  • Page 332

    10–102 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING Note: 1. When the diagnostic function has turned on, the copier can be reset by turning it off once. This, however, does not apply to E000, E001, E002, E003, or E004. This is to prevent the user from resetting the[...]

  • Page 333

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–103 CHAPTER 10 TROUBLESHOOTING B. ADF • Exchange of data with the copier has a fault. • The separation motor does not rotate. • The crescent sensor is faulty. • The belt motor does not rotate. • The belt clock is faulty. • The feed [...]

  • Page 334

    10–104 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) CHAPTER 10 TROUBLESHOOTING C. Sor ter • Exchange of data with the copier is faulty. • The feed motor does not rotate. • The feed motor rotates too slowly. • The tandem path motor does not rotate. • The stack motor does not rotate.[...]

  • Page 335

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) APPENDIX A. GENERAL TIMING CHART ................ A-1 B. SIGNALS AND ABBREVIATIONS ...... A-2 C. GENERAL CIRCUIT DIAGRAM .......... A-5 D. SPECIAL TOOLS LIST ........................ A-7 E. SOLVENTS AND OILS ........................ A-8[...]

  • Page 336

    [...]

  • Page 337

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) A–1 A. GENERAL TIMING CHART Power switch ON Start key ON Leading edge of 1st page 160 ° C 120 ° C Power switch OFF Wait indicator Main motor (M1) Pre-exposure lamp (LA2) Fixing heater (H1) Primary charging assembly Transfer charging assembly Dev[...]

  • Page 338

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) A–2 B. SIGNALS AND ABBREVIA TIONS 1. Signals 5V_ON 5VU ON signal AC_24V_ON AC AND 24V ON signal [AE_DATA] AE SENSOR OUTPUT signal [AE_REF] AE SENSOR REFERENCE signal BLK_CNDR* BLANK EXPOSURE LAMP CENTER DRIVE command BLK_DEN* BLANK EXPOSURE LAMP D[...]

  • Page 339

    COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) A–3 AER AE ROTATION INTR INITIAL ROTATION LSTR LAST ROTATION SCFW SCANNER FORWARD SCRV SCANNER REVERSE STBY STANDBY WMUP WARM-UP WMUPR WARM-UP ROTATION 2. Abbreviations[...]

  • Page 340

    APPENDIX A–4 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)[...]

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    A–5 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 876543 21 A B C D E F 1234 1 J754 FG J750 J752 234 1234 1234 1234 1234 1 2 3 123 123 123 1 2 3 3 2 1 3 4 2 1 5 6 7 8 9 10 11 12 1234 321 1 5432 5 1234 2 12 1 2 1 2 1 2 4 3 1 1 3 2 5678 1234 1234 123 3 2 1 123456789 1 0 123456789 123456789 1 0 [...]

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    APPENDIX A–6 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)[...]

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    APPENDIX COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) A–7 D . SPECIAL TOOLS LIST Front door Point of use No. Tool description Tool No. Shape Notation Remarks 1 Door switch TKN-0093 A 2 Mirror positioning tool FY9-3009 B For adjusting the No. 1/No. 2 mirror position (front/rear as a pair)[...]

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    APPENDIX A–8 COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) E. SOL VENTS AND OILS No. Description Use Composition Description 1 Ethyl alcohol (Etanol) Isopropyl alcohol (Isopropanol) Cleaning: e.g., glass, plastic, rubber parts; external covers C2H5O (CHZ3)2 CHOH • Do not bring near open fir[...]

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    Prepared by OFFICE IMAGING PRODUCTS TECHNICAL SUPPORT DEPT. 1 OFFICE IMAGING PRODUCTS TECHNICAL SUPPORT DIV. CANON INC. Printed in Japan REVISION 0 (AUG. 1998) [23715] 5-1, Hakusan 7-chome, Toride-shi, Ibaraki 302-8501, Japan[...]

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    0998S0.7-1 This publication is printed on 70% reprocessed paper . PRINTED IN JAPAN (IMPRIME AU JAPON)[...]