Epson FX-870/1170 manuale d’uso

FX-870/1170 SERVICE M ANUAL I Revision Level I EPSON ® @ Printed on Recycled Paper.[...]

FCC Compliance Statement For American Users This equipment has been tested and found to comply with limits for a Class B digital device pursuant to Part 15 of FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequen[...]

- Copyright Notice All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electric, mechanical, photocopying, recording, or otherwise, without the written permission of Epson America, Inc. No patent liability is assumed with respect to use of the information cont[...]

Precautions Precautionary notations throughout the text are categorized relative to 1) personal injury, and 2) damage to equipment. WARNING Signals a precaution which, if ignored, could result in serious or fatal personal injury. Great caution should be exercised in performing procedures preceded by a WARNING heading. CAUTION Signals a precaution w[...]

How to Use this Manual This manual contains the information that a service provider needs to support the Epson FX-870/1170 printer. 0 It provides general information and specifications for the printer. 0 It tells you how to set up and configure the printer at a customer site. . If you encounter problems, the manual explains how to troubleshoot the [...]

4 Disassembly/Assembly This chapter lists the tools you need and gives the recommended procedure for removing and replacing components. 5 Adjustments, Maintenance, and Lubrication This chapter provides instructions for performing the platen gap adjustment and the bidirectional adjustment procedure. There is also a description of the lubricants requ[...]

Handy Numbers for U.S. Dealers Epson Customer Resource Center (800) 922-8911 Epson Faxback System (310) 782-4214 Epson Bulletin Board System (310) 782-4531 Numbers and Addresses for Dealers Outside the U.S. Epson Canada, Ltd. 95 Mural Street Richmond Hill, Ontario LAB 3G3 ;htp (800) GO-EPSON . . (416) 881-5765 Epson Do Brazil Av. Pedroso De Morais [...]

Contents - Contents Chapter 1 Printer Features Options ................................................................................. 1-3 Hardware Specifications ........................................................................... 1-3 Firmware Specifications ......................................................................... 1-12 In[...]

Contents Chapter 4 Disassembly and Assembly Precautions ............................................................................................. 4-1 Tools ....................................................................................................... 4-1 Service Checks After Repair ......................................................[...]

Printer Features Chapter 1 Printer Features Options.. .................................................................................................... 1-3 Hardware Specifications.. ......................................................................... 1-3 Printing Method .......................................................................[...]

Printer Features C094 MAIN Board Assembly (Main Control Board) ................. 1-29 C094 PNL Board Assembly (Control Panel Circuit Board) ................... 1-30 C076 PSB Board Assembly (Power Supply Circuit Board) .................. 1-30 Printer Mechanism ........................................................................ 1-31 Housing Asse[...]

Printer Features Table 1-14. Optional Interface ........................................................... 1-16 Table 1-15. Identifying Errors Using the LEDs ................................ l-19 Table 1-16. Group 1 Features ............................................................ 1-20 Table 1-17. Group 2 Features (ESC/P Mode) ................[...]

Printer Features 1 The FX-870/1170 combines advanced firmware, reliability, and affordability in a single light-weight unit. The major features of this printer are: l Upward compatibility with the FX-850/1050 and the FX-86e/286e l 380 cps (high-speed draft for both 80- and 136-column models) l 285 cps (draft pica), 342 cps (draft elite) l Advanced [...]

Printer Features 80-column model 1-2 136-column model Figure 1-1. External View of the FX-870/1170 Epson FX-870/1170[...]

Printer Features options C806371 C806391 C806381 C806401 C800201 C800211 C814001 C814011 C823051 C823071 C823101 C823141 C823151 #8750 #8755 #8758 #8310 Single-bin cut-sheet feeder (80-column) Single-bin cut-sheet feeder (136-column) High-capacity cut-sheet feeder (80-column) High-capacity cut-sheet feeder (136-column) Tractor unit (80-column) Trac[...]

Printer Features Dot matrix: 9 x 7 matrix (high-speed draft) 9 x 9 matrix (drafk) 18 x 23 matrix (NLQ) Paper Handling Feeding methods: Friction feed (front/top) Push tractor feed (front/rear) pull tractor feed (front/rear/bottom) Push-pull tractor feed (front/rear) Method to use for each type of paper: Fanfold: Tractor feed Cut sheets: Friction fee[...]

Printer Features Precautions for Handling Paper Friction feed l Set the release lever to the FRICTION position. l Load the paper from the front or top entrance. l Do not use continuous paper. l Do not perform any reverse paper feeds within the top 0.34” (8.5 mm) area and bottom 0.88” (22 mm) area. l Do not perform reverse feeds greater than l/6[...]

Printer Features Paper Specifications See Tables 1-2, 1-3, 1-4, 1-5, 1-6, and 1-7. Normal Environmental Conditions Recycled paper, envelopes, and labels require normal environmental conditions, which are the following: Temperature: 59-68”F(15-25°C) Humidity: 30 - 60 % RI-I Table 1-2. Specifications for Cut Sheets (Standard Paper) Width top inser[...]

Printer Features Table 1-4. Specifications for Continuous Paper Width Thickness Weight Quality 4- 10” (101-254 mm) 80-column 4-l 6” (101-406 mm) 136~column 0.0025-0.012” (0.065-0.32 mm) 14-22 lb (45-70 kg) (52.3-82 g/m*) - single sheet 12-l 5 lb (34-50 kg) (40-58.2 g/m*) - each Standard or carbonless duplicating paper Recycled paper (at norma[...]

Printer Features Table 1-7. Specifications for Roll Paper - Size 8.5 f 0.12” (216 A 3 mm) Thickness 0.0028-0.0035” (0.07-0.09 mm) Weight 14-22 lb (45-70 kg) (52.3-82 g/m*) Quality Standard paper Note: Roll paper is available optionally only for the 80-column model, and its diameter must not exceed 5” (127 mm). Printable Area Cut sheets top in[...]

Printer Features Continuous paper c c 0 3 0 0 0 101-254 mm (4-10"): 80 columns 101-406 mm (4-16"): 136 columns > *1 >L+ 0 0 0 0 0 0 0 G c c WXYZ g J 0 -0 0 0 WXYZ g I 0 0 0 <I 0 0 c ABCD 0 0 0 0 0 0 C c Printable Area Figure 1-4. Printable Area for Continuous Paper l 1 13 mm (0.51”) or more when the paper width is 4” to 9.5?[...]

Printer Features Roll paper (80-column model only) top insertion 216 2 3 mm (8.5 2 0.12”) - Printable Area WXYZ t WXYZ J Figure 1-5. Printable Area for Roll Paper *I 0.12” (3.0 mm) or more Note: Paper feed accuracy cannot be assured within 24 mm (0.94”) from the bottom edge of the paper (top insertion only). Ribbon Cartridge Ribbon Color Whhn[...]

Printer Features Electrical Specifications See Table l-8. Table 1-8. Electrical Specifications for 120 V Model Rated voltage 120 VAC Input voltage range 103.5132 VAC Rated frequency range 50-60 Hz Input frequency range 49560.5 Hz . Rated current 1.8 A Power consumption Approx. 45 W ( 80 columns) Approx. 45 W (136 columns) (Self-test in draft mode, [...]

Printer Features Safety Approvals Safety standards UL1950 with D3 CSA!z2.2#220 RF1 * FCC class B Firmware Specifications Print Control Printing direction Text mode Bidirectional printing with logic seeking. (Unidirectional printing can be specified by software.) Bit image mode Unidirectional printing Character sets ASCII characters ESC/P mode - Ita[...]

Printer Features Table 1-12. Print Speed Type of letters Print speed [cps] High-speed draft 380 (320) 11421 Draft pica 285 ii421 Draft elite 342 [1701 Condensed draft pica 243 v221 Emphasized draft pica 142 1711 NLQ normal pica 57 Notes: 1. The printing speed for high-speed drafl is reduced to the value in ‘I( )” with thick paper (over 0.007 in[...]

Printer Features BUSY I ACKNLG DATA p . . . . . . . . . . . . . . . . -.- STROBE - t1 t1 t1 t2 t3 t,: 0.5 p-s (minimum) t2: 7 w (approximate) 5: 5 w (approximate) Figure 1-6. Data Transmission Timing Table 1-13. Connector Pin Assignments and Signal Functions Signal Return Pin Pin Signal No. No. Name Dir. Description 1 19 STROBE In STROBE pulse to r[...]

Printer Features Table 1-13. Connector Pin Assignments and Signal Functions (Cont.) signal Return Pin Pin Signal No. No. Name Dir. Description 12 30 PE Out A HIGH signal indicates that the printer is out of paper. . 13 - - - Pulled up to +5 V through a 3.3K-ohm resistor. 14 - AUTO FEED In When this signal is LOW, paper is XT automatically fed one l[...]

Printer Features should be shielded and connected to the chassis of the host computer and the printer, respectively. - 4. All interface conditions are based on TTL level. Both the rise and fall times of each signal must be less than 0.2 us. 5. Data transfers must not be carried out by ignoring the ACKNLG or BUSY signal. (Data transfers to this prin[...]

Printer Features - Control Panel READY ,, OPL,, Figure 1-7. Control Panel Buttons OPERATE 1 lock type button PAUSE/TEAR OFF PAPER FEED I- (non-lock push-type buttons) FONT Indicators READY - (green) 3 LEDs FONT (Draft, Roman, Sans serif) - (green) CONDENSED - (green) Buttons PAUSE l When there is data in the input buffer: Selects printing or pause [...]

Printer Features FONT (ALT) - Selects NLQ Roman, NLQ Sans serif, Draft, and condensed ofthose 3 fonts in rotation: (DraR + Draft cond. 3 Roman + Roman cond. 3 Sam serif * Sam cond. + Draft + Draft cond. . ...) (The factory setting is Draft, uncondensed font.) The selection is executed when the button is released and is stored in non-volatile memory[...]

Printer Features Bin Selection for the Cut Sheet Feeder l When there is no paper in the paper path: Holding down the FONT (ALT) button while pressing PAUSE or PAPER FEED alternates bin selection if a double-bin cut-sheet feeder is attached and friction feed is selected. Paper Ejection Holding down the FONT (ALT) button and pressing PAPER FEED eject[...]

Printer Features Default Settings -. You can set certain default parameters to be used at printer initialization. To change the parameters shown in Table l-16, Group 1 Features, follow the steps below: 1. Turn on the printer while pressing the FONT button. The printer beeps once and prints the current default settings on the paper loaded in the pap[...]

Printer Features To change the settings shown in Table 1-17, Group 2 Features (ESC/P mode), or in Table l-18, Group 2 Features (7BM mode), follow the steps below: 1. Turn on the printer while pressing the FONT and PAUSE buttons. The printer beeps once and prints the current character table for either ESC/P or IBM mode on the paper loaded in the pap[...]

Printer Features Table l-18. Group 2 Features (IBM Mode) FONT COND. READY LED LED LED OFF OFF ON OFF OFF BLINKS OFF ON OFF Character Table Character table PC437 (table 1) (standard) PC437 (table 2) PC865 (table 1) [ OFF 1 ON 1 ON PC865 (table 2) Notes: 1. For table 1, codes 80-9FH are control codes. (ESC 7 is set.) For table 2, codes 80-9FH are pri[...]

Printer Features sheet feeder (CSF), the first sheet is used for scaling the sheet length. Then, the maximum number of printable lines is printed in the bottom line of the sheet and saved in non-volatile memory as the default page length. Page lengths are saved individually when a dual-bin CSF is in use. The self test prints out the following: l Ma[...]

Printer Features Paper-out Detection If the paper-out sensor detects a paper out, the printer automatically enters a pause condition after feeding or printing several lines. When a paper-out is detected, load new paper properly and set the printer ready to print by pressing the PAUSE button. Auto Tear-off When the release lever is set to one of the[...]

Printer Features position. If a paper out is detected before printing starts, the sheet is loaded automatically to the top-of-form position, without PAPER FEED being pressed. l Continuous paper loading and ejection (paper park) Move the release lever to REAR PUSH/FRONT PUSH position and load paper into the tractor unit. Press PAPER FEED to load the[...]

Printer Features Printer Initialization The printer is initialized in the following cases. l When the printer is turned on. l When the INIT signal or CMREQ (optional I/F ) is input. When the printer is initialized, it performs the following functions: l The printhead returns to the leftmost position (carriage home). l The READY LED lights. l The pr[...]

Printer Features -. Buzzer The buzzer beeps for 0.1 second at a time. These beep sounds are combined in various ways, as shown below, to indicate different meanings. In the following table, each ” l ” stands for one beep. Table 1-21. Buzzer Functions Status Sound Description 3EL code 0 Sounds when a BEL code is received. Zarriage trouble - - A [...]

Printer Features Main Components The components of the FX-870/1170 are designed for easy removal and replacement during maintenance and repair. The main components are: l C094 MAIN board assembly l C094 PNL board assembly l C076 PSB board assembly l Printer mechanism l Housing assembly The following figure shows the main components of the FX-870/11[...]

Printer Features C094 MAIN Board Assembly (Main Control Circuit Board) Basically, the same board layout is used in both the 136~column model and the 80- column model. The CPU on this board controls all the main functions of the printer. It consists of a TMP90C041F 8-bit CPU, an E05A55YA gate array, an E2PROM, a PSRAM, a MASK ROM, motor drivers, and[...]

Printer Features C094 PNL Board Assembly (Control Panel Circuit Board) This boardis the control panel ofthe F’X-870/1170, consisting of a power button, three function buttons, and three indicator LEDs. Figure 1-13. CO94 PNL Board Assembly (Control Panel Circuit Board) CO76 PSB Board Assembly (Power Supply Circuit Board) This board is composed of [...]

Printer Features Printer Mechanism The printer mechanism consists of a g-pin impact dot head, a carriage mechanism, a carriage motor, a paper feed mechanism, a paper feed motor, a ribbon feed mechanism, and various sensors. 136-column model 80-column model Figure l-16. Printer Mechanism Epson FX-870/1170 1-31[...]

Printer Feature8 Housing Assembly The printer mechanism and all the boards are contained in a housing assembly that consists of the upper case and the lower case. 1-32 Figure 1-16. Housing Assembly Epson FX-870/1170[...]

Printer Features Commonly Asked Questions and Answers This section contains facts that customers often want to know about this printer. The question-and-answer format is to make it easier for you to scan through the information. 1. Q. A. 2. Q. A. 3. Q. A. 4. Q. A. 5. Q. A. 6. Q. A. What are the FX-870 and FX-1170 printers? The FX-870 and FX-1170 pr[...]

Printer Features 7. Q. A. Do the FX-870 and FX-1170 use the same ribbons as the FX-850 and FX- 1050? Yes. 8750 (fabric) for the FX-870 8755 (fabric) for the FX-1170 8758 ribbon only replacement pack (Never use ribbons for 24-pin printers. To extend printhead life, use only the Epson ribbons listed above.) 8. Q. What is the part number for the print[...]

Printer Features 13. Q. How many paper paths are there for the FX-870 and FX-1170? A. The printers have 4 paper paths: Top feed Bottom feed Rear feed Front feed 14. Q. How is the tractor used for feeding with the FX-870/1170? A. The FX-870 and FX-1170 come with one tractor, which can be positioned for three different types of feeding: Front feed pu[...]

Installation and Setup Chapter 2 Installation and Setup Procedures Site Requirements .................................................................................... 2-1 Removing the Packing Materials ............................................................. 2-1 The Correct Power On Sequence .................................................[...]

Installation and Setup Procedures 2 . This chapter provides tips to help you select a site, set up, and test the printer. There is information on the using the parallel and serial interfaces, along with cabling configurations for serial transmission. The last portion of the chapter provides information customers need to know about this printer to e[...]

Installation and Setup Running the Self-Test The self-test checks the printer mechanically and electronically to make sure it works properly. If the printer runs the self-test successfully, it means that everything is operational in the printer (with the possible exception of the interface circuit). To run the self-test, hold down the PAPER PEED bu[...]

Installation and Setup The cable configuration for connecting the printer serially to a 25-pin (XT-type) computer connector is shown in the figure below. PtiIltff side 25pin to 25pin Serial Cable Computer 1 FGND, ,l FGND :~.-x,xl 5 CTS 4 ,5 CTS 6 DSR 4 +6 DSR Figure 2-2. Serial Cable Configuration to a 25Pin Computer Connector - Checking the Printe[...]

Installation and Setup Then try sending a print screen again or type: DIR > PRN and press Enter at the MS-DOS prompt to print a listing of the current directory. - (If you needed to change the MS-DOS MODE command to reroute the computer’s output to the correct port, edit the system’s AUTOEXEC.BAT file to include this MODE command automatical[...]

Troubleshooting Chapter 3 Troubleshooting Test Points ................................................................................................ 3-1 Error Codes ............................................................................................... 3-5 Problem Isolation .................................................................[...]

Troubleshooting 3 The information in this section can help you identify causes of printer problems and test the printer to isolate the part that needs to be replaced. The chapter also contains illustrations showing connector locations and sensor locations. Once you have read this chapter to determine what tests you need to run on the printer, see C[...]

Troubleshooting Table 3-2. Sensor Test Points Sensor Test Method Connector (Set Meter to Ohms. Number Check with Printer Power Off.) Release Lever Place one lead on each pin. Change the release (CN4) lever position. Platen Gap Place one lead on each pin. Change the adjust (CW lever position. CR Home Place one lead on each pin. Move carriage to and [...]

Troubleshooting - Ho #8 0 #I7 0 #6 0 #I5 0. #4 0 #3 0 #2 0 #’ 0 [TERMINAL ASSIGNMENT] Note: The printhead is upside down in this illustration. [WIRE ASSIGNMENT] 1 Note: The commons correspond to the following printhead dot wires: J COM. 2 = #2, #4, #6 COM. 8 = #7, #8, #9 COM. 14=#1,#3,#5 Figure 3-1. Printhead Resistance Table 3-4. Printhead Test [...]

Troubleshooting Table 3-5. Printhead Driver Test Points Transistor Test Method Numbers (Set Meter to Diodes. Check with Printer Power Off.) Meter Reading Q2, Q4, Q5 Emitter and base are marked on the CO94 MAIN board. Consistent readings for all Q6, Q8, Q9 Check from base to collector, from base to emitter, and transistors, within YZ 20%. Ql 0, Ql 1[...]

Troubleshooting Error Codes Table 3-7. Error Codes Error Warning Error Cause 3uzzer beeps: Carriage error Use flowchart 2 in this chapter to isolate moo.0 the problem. 3uzzer beeps: Memory error RAM abnormality. Y.0.0.. 3uzzer beeps: mnnnn Memory error E2PROM abnormality. 3uzzer beeps: Paper out error l Continuous paper has run out. moooooOenoeonnn[...]

Troubleshooting Problem Isolation Most printer problems can be corrected by replacing the defective unit. First, identify the problem from the symptoms you observe using the table below. Then, follow the instructions in the corresponding flowchartto correct the problem. Table 3-8. Symptoms and Flowchart References Flowchart Symptom Possible Problem[...]

Troubleshooting Table 3-8. Symptoms and Flowchart References (Continued) Flowchart Symptom Possible Problems or Solution When I try to load paper, the l There is a problem with one of the PE sensors. Use Table 3-2 printer feeds it back out. l The main board is not reading sensor output correctly. to test front and rear PE sensor. The printer contin[...]

Troubleshooting Table 3-9. IdentiQing Serial Communications Errors (Continued) Problem Device timeout error Possible Cause l The computer is not set for infinite retries to the printer. Solution Type a MODE command from the MS-DOS prompt that includes the infinite retry parameter. For instance, if the serial interface card’s switches are in the f[...]

Troubleshooting Chart 1. Printer Dead at Power On 0 START NO I Use correct AC voltage. (No fluctuation from AC range shown at left is permitted. No No No Dower on, does the new I (+35 V) at oin 10 I Measure the VP (+35 V) at pin 10 of CM2 on the C076 PSR board assembly. 1 “;e;c;dhe board assembly. I board. Measure the VL (+5 VI at pin 1 of CM2 on[...]

Troubleshooting Chart 1. Printer Dead at Power On (Continued) Disconnect connector CM1 2 and power on printer. Yes initialize? R;g;y;N;ha board. Check motors and printhead. 1 END I” (If shorted, use Tables 3-5 and 3-6 to check drivers on C994 MAIN board, and if bad, replace main board at same time. 1 board. END * - 3-10 Epson FX-870/1170[...]

Troubleshooting Chart 2. Carriage Does Not Move or Moves Abnormally kcuro thr on the CO94 U&IN connmtors. Manually wow the Check the gears. timing belt. and belt pulley for war, brmkagr, objects. and Coralgn Replace parts and lubrlcatr as nerdad. (km Chapter 5.1 Rapl8ca the Cg94 MAIN board. Repl8ce CR motor. If any coil Is shorted. use Table 3-[...]

Troubleshooting Chart 3. Paper Does Not Feed or Feeds Abnormally n START YOS / No IR, TY*s No / il Replace PF motor. If my coil Is shortrd. use Table 3-6 to Cast PF drlvors on the CW4 WIN board. and If bad. raplace uln board at aaa tin. roslstanca of tha PF motor. Is It 63 l /- 3 I No 3-12 END * Epson FX-870/1170[...]

Troubleshooting Chart 4. Poor Print Quality in Self-Test and turning on the prlntar. bo8rd connected Srcurs the connectors. Are any dots 1 q lsslng or Q drrgglng? No Perform thll No for bent or Chmck printhead rrslstance. If It Is not 16.5 ohms +/- 1.6 olmr raplax thr prlnthrad. If any prlnthmd pin Is shortrd. use Tablo 3-5 to chack drlwrs QZ - Q13[...]

Troubleshooting Chart 5. Ribbon Not Feeding Properly START Q Rap I ace the ribbon mark. rlght and left, does ribbon See Figure 6-21 (page 6-18). Check gearing for broken or wore gears or foreign objects stuck In the gears. Repface eny gears necessmy. Lubricate as necessary. (See Chapter 5.1 And make sure gears are turning smoothly. -, 3-14 Epson FX[...]

Troubleshooting Chart 6. Data fhm Host is Printed Incorrectly - Run self-tart. (Turn on prlntor *hIlo holding down the PAPER FEED button. 1 If self-tart Is g8rbl.d. th8 problr Is with the RDN or C194 RAIN bo8rd. Chrck daf8UltS shown in the self-test. Are they correct for the 8ppliC8tlOn? If not. sat th8m correctly. (Sm Def8Ult Settings In Chaptar 1[...]

Troubleshooting Chart 7. Page Length/Margins Incorrect Run self-test and chSck the printer’s drf8ult settings 8gainst the settings In your 8pplic8- tlon SOftW8rS. printer. Th8 problv Is wlth th8 softw8ro YOS The C894 IL&IN bo8rd f-l “y bs b8d. (This Is mor8 r8rS than problems with softw8rS settings.) 3-16 Epson FX-870/1170[...]

Troubleshooting Chart 8. Printout Double-Spaced the printer Is OK. At the MS-DOS prompt, type the following: NODE=LPTn:.6.P and press Enter. (“n” is the port you 8r* using. 1 Send another print screen. Disconnmt the cable. At the prlntar connector. you will see that the pin nmbers are Iabolod. Put a piace of tape over pin 14 to block thr sIgnal[...]

Troubleshooting Connector Locations The layout diagram below shows the positions of connectors on the C094 MAIN board. ‘R / II’ PE Rear’ 3-18 Figure 3-2. Connector Locations Epson FX-870/1170[...]

Troubleshooting Sensor Locations The illustrations below show the locations of sensors in the printer mechanism. Figure 3-3. Release Sensor Figure 3-4. Home Position Sensor Epson FX-870/1170 3-19[...]

Troubleshooting Printer Mechanism Figure 3-5. Platen Gap Sensor Rear Paper Guide Assembly 3-20 Figure 3-6. Front and Rear PE Sensors Epson FX-870/1170[...]

Troubleshooting Hex Quick Reference Table for ESC/P Commands Use the table below as an aid to read printer hex dumps. This table is for quick reference only. The user’s guide contains a detailed description of the control codes. Table 3-10. Hex. Codes for ESC/P Commands Hex. Dec. ASCII Command 07 08 09 OA OB oc OD OE OF 11 12 13 14 18 19 20 21 23[...]

Troubleshooting Table 3-10. Hex. Codes for ESC/P Commands (Continued) - Hex. Dec. ASCII Command 3D 61 ESC = Set MSB to 0 3E 62 ESC > Set MSB to 1 3F 63 ESC?sm Reassign graphics mode 40 64 ESC @ Initialize printer 41 65 ESCAn Set n/72-inch line spacing 42 66 ESC B nn Set vertical tabs 43 67 ESC C n (0 n) Set page length in lines (in inches) 44 68[...]

Troubleshooting Hex Quick Reference Table for IBM Commands Use the table below as an aid to read printer hex dumps. This table is for quick reference only. The user’s guide contains a detailed description of the control codes. Table 3-11. Hex. Codes for IBM Commands Hex. Dec. ASCII Command 07 07 08 08 09 09 OA 10 OB 11 oc 12 OD 13 OE 14 OF 15 11 [...]

Troubleshooting Table 3-11. Hex. Codes for IBM Commands (Continued) - I Hex. Dec. ASCII Command I 4E 78 4F 79 50 80 51 81 52 82 53 83 54 a4 55 a5 57 a7 58 aa 59 89 5A 90 5B 40 91 64 5c 92 5E 94 5F 95 ESCNn ESC 0 ESC P l/O ESCQn ESC R ESC S l/O ESC T ESC U l/O ESC W l/O ESCXnl r-12 ESC Y nl n2 ESC Z nl n2 ESC [ Q nn ESC nl n2 ESC h ESC- l/O Set sk[...]

Disassembly and Assembly Chapter 4 Disassembly and Assembly Precautions ............................................................................................. 4-1 Tools ........................................................................................................ 4-1 Service Checks After Repair .....................................[...]

Disassembly and Assembly Figure 4-12. Removing the PF Motor Assembly ................................. 4-13 Figure 4-13. Disassembling the PF Gear Train .................................. 4-14 Figure 4-14. Positioning the Release Lever for Insertion ................... 4-14 Figure 4-15. Removing the Carriage Guide Assembly ....................... 4[...]

Disassembly and Assembly 4 - This section provides information you need to know to disassemble or assemble the printer. Precautions Read the precautions below before you disassemble or assemble the printer. WARNING Before disassembling, assembling, or adjusting the printer, disconnect the power supply cable from the AC power outlet. Failure to do s[...]

Disassembly and Assembly Service Checks After Repair Before you send the printer back to the customer, fill in the checklist in Table 4-3 to note the current state of the components. This checklist facilitates servicing and shipping. Table 4-3. Inspection Checklist for Repaired Printer -- QmwY Printer features Component Printhead Carriage mechanism[...]

Disassembly and Assembly Screw Specifications This chapter uses abbreviations for small parts, such as screws and washers. Tables 4-4 and 45 list these abbreviations. Table 4-4. Abbreviations Used for Screws Abbreviation Part Name CBB Cross-recessed Bind head B tight screw CBC Cross-recessed Bind head C tight screw CBN . Cross-recessed Bind head N [...]

Disassembly and Assembly Notes for Unit Removal and Installation This section describes the procedures for disassembling and assembling the main components of the printer. Generally, you can install a component in the printer simply by reversing the procedure for removing the component. Therefore, this chapter does not describe assembly procedures [...]

Disassembly and Assembly Items to Remove Before Disassembling the Printer 1. Remove the paper guide assembly, ribbon, top cover, front cover, paper eject cover, and tractor unit. Figure 4-2. Removing the Paper Guide Assembly Note: Remove the paper eject cover and the tractor unit by pushing and releasing the hooks at both sides. When remounting the[...]

Disassembly and Assembly Removing the Panel Unit - 1. Remove the paper guide assembly, ribbon, top cover, f?ont cover, paper eject cover and tractor unit. fSee page 4-5.) 2.’ Push the two clips on the bottom of the panel unit and remove the panel unit. 3. Remove the flexible flat cable (FFC). Figure 4-3. Removing the Panel Unit Assembly Note The [...]

Disassembly and Assembly Removing the Printhead 1. Remove the paper guide assembly, ribbon, top cover, front cover, paper eject cover, and tractor unit. (See page 4-5.) 2. Remove the two CBS (M3x8) screws from the printhead, lift the printhead up, and remove the FFC cable. 3. Remove the printhead. FFC Figure 4-5. Removing the Printhead Epson FX-870[...]

Disassembly and Assembly Removing the Upper Housing Assembly 1. Remove the paper guide assembly, ribbon, top cover, front cover, paper eject cover, and tractor unit. (See page 4-5.) 2. Remove the panel unit. (See page 4-6.) 3. Remove the four CBC (M4x15) screws securing the upper housing assembly. (There are only three screws in the 80-column print[...]

Disassembly and Assembly Removing the Printer Mechanism 1. 2. 3. 4. 5. 6. 7. Remove the paper guide assembly, ribbon, top cover, front cover, paper eject cover, and tractor unit. (See page 4-5.) Remove the panel unit. (See page 4-6.) Remove the upper housing assembly. (See page 4-8.) Remove the four CBB (M4x12) screws securing the printer mechanism[...]

Disassembly and Assembly Removing the Platen Assembly -_ 1. Remove the paper guide assembly, ribbon, top cover, front cover, paper eject cover and tractor unit. (See page 4-5.) 2. Remove the panel unit. (See page 4-6.) 3. Remove the upper housing assembly. (See page 4-8.) 4. Remove the two CBS (M3x8) screws securing the platen cover. 5. Disengage t[...]

Disassembly and Assembly Removing the Rear Frame Assembly 1. Remove the paper guide assembly, ribbon, top cover, front cover, paper eject cover, and tractor unit. (See page 4-5.) 2. Remove the panel unit. (See page 4-6.) 3. Remove the upper housing assembly. (See page 4-8.) 4. Remove the printer mechanism. (See page 4-9.) 5. Remove the platen assem[...]

Disassembly and Assembly Removing the CR Motor Assembly 1. Remove the paper guide assembly, ribbon, top cover, front cover, paper eject cover, and tractor -’ unit. (See page 4-5.) 2. Remove the panel unit. (See page 4-6.) 3. Remove the upper housing assembly. (See page 4-8.) 4. Remove the face screw (M3x7) securing the CR motor assembly. After re[...]

Disassembly and Assembty Removing the PF Motor Assembly - 1. Remove the paper guide assembly, ribbon, top cover, front cover, paper eject cover, and tractor unit. (See page 4-5.) 2. Remove the panel unit. (See page 4-6.) 3. Remove the upper housing assembly. (See page 4-8.) 4. Remove the printer mechanism. (See page 4-9.) 5. Set the release lever t[...]

Disassembly and Assembly Disassembling the PF Gear Train 1. Remove the paper guide assembly, top cover, front cover, paper eject cover, and tractor unit. (See page 4-5.) 2. Remove the panel unit. (See page 4-6.) 3. Remove the upper housing assembly. (See page 48.) 4. Remove the printer mechanism. (See page 4-Q.) 5. Remove the CR motor assembly. (Se[...]

Disassembly and Assembly Removing the Carriage Assembly 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Remove the paper guide assembly, ribbon, top cover, front cover, paper eject cover, and tractor unit, (See page 4-5.) Remove the panel unit. (See page 4-6.) Remove the printhead. (See page 4-7.) Remove the upper housing assembly. (See page 4-8.) Remove the printe[...]

Disassembly and Assembly Assembly Note ‘- When attaching the timing belt to the carriage assembly, secure the timing belt using the 1eR and right clips of the carriage assembly as shown below. Make sure there is no slack in the timing belt. Clip Timing Figure 4-16. Attaching the Timing Belt 4-16 Epson FX-870/1170 -[...]

Disassembly and Assembly Removing the Ribbon Drive (RD) Assembly 1. Remove the paper guide assembly, ribbon, top cover, front cover, paper eject cover, and tractor unit. (See page 4-5.) 2. Remove the panel unit. (See page 4-6.) 3. Remove the upper housing assembly. (See page 4-8.) 4. Remove the printer mechanism. (See page 4-9.) 5. Remove the plate[...]

Disassembly and Assembly Removing the Home Position (HP) Sensor - 1. Remove the paper guide assembly, ribbon, top cover, front cover, paper eject cover, and tractor unit. (See page 4-5.) 2. Remove the clip of the HP sensor. Remove the sensor. 3. Disconnect the HP lead from the HP sensor. Figure 4-18. Removing the HP Sensor Removing the Platen Gap ([...]

Disassembly and Assembly Removing the Front and Rear Paper End (PE) Sensors 1. Remove the paper guide assembly, ribbon, top cover, front cover, paper eject cover, and tractor unit. (See page 4-5.) 2. Remove the panel unit. (See page 4-6.) 3. Remove the upper housing assembly. (See page 4-8.) 4. Remove the printer mechanism. (See page 4-9.) 5. Remov[...]

Disassembly and Assembly Removing the Release Sensor 1. 2. 3. 4. 5. 6. 7. Remove the paper guide assembly, ribbon, top cover, front cover, paper eject cover, and tractor unit. (See page 4-5.) Remove the panel unit. (See page 4-6.) Remove the upper housing assembly. (See page 4-8.) Remove the printer mechanism. (See page 4-9.) Remove the platen asse[...]

Disassembly and Assembly Arranging the Cables When you assemble the printer, arrange the cables as shown in Figure 4-22. El - - Printer Mechanism (Bottom) W Figure 4-22. Arranging the Cables Epson FX-8700170 4-21[...]

Disassembly and Assembly Disassembling the Tractor Unit 1. Remove the paper guide assembly, ribbon, top cover, front cover, paper eject cover, and tractor unit. (See page 4-5.) 2. Release the two clips for cog (17) from the tractor shaft. Remove the cog. 3. Remove the right tractor frame from the tractor shaft and the tractor guide shaft. 4. Remove[...]

Disassembly and Assembly Removing the C094 MAIN Board Assembly 1. 2. 3. 4. 5. 6. 7. 8. 9. Remove the paper guide assembly, ribbon, top cover, front cover, paper eject cover, and tractor unit. (See page 4-5.) Remove the panel unit. (See page 4-6.) Remove the upper housing assembly. (See page 4-8.) Remove the printer mechanism. (See page 4-9.) Discon[...]

Disassembly and Assembly Removing the C076 PSB Board Assembly NOTE To remove the C076 PSB board assembly for replacement, you must use a special extractor tool, available from Epson Parts Order Services. After obtaining the special tool shown, follow the procedure below. I OneWai (Rivet Head) Screw Figure 4-26. Special Extractor Tool WARNING Do not[...]

Disassembly and Assembly CBC (M3X8) CBB (M3X12) C076 PSB Board Figure 4-27. Removing the C076 PSB Board Assembly Assembly Epson FX-870/1170 4-25[...]

Adjustments, Maintenance, and Lubrication Chapter 5 Adjustments, Maintenance, and Lubrication Adjusting the Printer Mechanism ............................................................ 5-1 Platen Gap Adjustment ................................................................... 5-1 Bidirectional Alignment Adjustment ..............................[...]

Adjustments, Maintenance, and Lubrication 5 Adjusting the Printer Mechanism This section describes the various adjustments required to keep the printer mechanism in optimum condition. Platen Gap Adjustment If you have changed the printhead, rotated or reassembled the carriage guide shaft, moved the parallelism adjustment bushing, or if printing is [...]

Adjustments, Maintenance, and Lubrication Left Frame 8ox Oriver -4/ ’ Adjustment Bushing Figure 5-2. Parallelism Acijustment Bushing 9. Rotate the adjusting bushing until the platen gap is large enough for a 0.36 mm thickness gauge, but too narrow for a 0.40 mm thickness gauge. 0.38 mm +I Id Figure 5-3. Platen Gap 10. Move the carriage until the [...]

Adjustments, Maintenance, and Lubriition Bidirectional Alignment Adjustment This section describes how to adjust the bidirectional print position to ensure correct printing. Overview of the Bidirectional Alignment Adjustment The FX-870/1170 prints characters when the carriage moves from both from left to right and from right to left. Therefore, the[...]

Adjustments, Maintenance, and Lubrication Adjustment Operation 1. 2. 3. 4. 5. 6. 7. - Turn on the printer’s power while pressing the PAUSE, PAPER FEED, and FONT buttons simultaneously. The printer enters draft mode and prints the current adjustment value and four lines of the H character. (See Figure 5-3.) If the vertical lines are well aligned, [...]

Adjustments, Maintenance, and Lubrication Preventive Maintenance No preventive maintenance is required other than occasionally vacuuming the printer mechanism to remove dust and paper debris and regularly cleaning the case exterior with denatured alcohol. After cleaning the unit, check that it is properly lubricated as described under Lubrication, [...]

Adjustments, Maintenance, and Lubrication Table 5-2. Lubrication Points Ref. No. Lubrication Points Lubricant 1 Platen gap adjustment slots on the left frame (excluding G-26 the two slots at the bottom) 2 The arms and tab of the RD assembly G-26 d 3 The shaft end of the drive roller assembly G-26 4 The ribbon drive gear train G-26 5 The oil pad in [...]

[...]

Principles of Operation Chapter 6 Principles of Operation Printer Mechanism Operation ................................................................. 6-1 Printhead Mechanism ...................................................................... 6-1 Carriage Mechanism ........................................................................ 6-3 Pla[...]

Principles of Operation Figure 6-8. Push-pull Tractor Operation Using the Rear Paper Entrance ........................................................ 6-10 Figure 6-9. Push-pull Tractor Operation Using the Front Paper Entrance ....................................................... 6-11 Figure 6-10. Release Lever ...................................[...]

Principles of Operation Table 6-6. Carriage Motor Drive Modes ............................................. 6-27 Table 6-7. Repairing the C076 PSB Board Assembly ........................ 6-31 Table 6-8. Repairing the C094 MAIN Board Assembly .................... . 6-34 Epson FX-870/1170 6-iii[...]

Principles of Operation 6 This chapter explains the mechanical and electrical operations of the FX-870/1170. At the end of the chapter, there are tables for component-level diagnosis of the main logic board and the power supply board. Printer Mechanism Operation This section describes the FX-870/1170 printer mechanism and explains how the printer w[...]

Principles of Operation 4. As soon as the current through the coil is switched off, the force induced in the coil rod stops. The plate then returns to its original position (the position assumed before the coil was energized) through the action of the plate spring. After the dot wire hits the platen, the rebounding force of hitting the platen works[...]

Principles of Operation Carriage Mechanism The timing belt is connected to the lower side of the carriage. With the printhead installed, the carriage moves in either direction along the carriage guide shaft. The carriage (CR) motor, a stepping motor, drives the timing belt, which moves the carriage. The home position (HP) sensor detects the home po[...]

Principles of Operation Platen Gap Adjustment The platen gap (the gap between the platen and the printhead) can be adjusted to allow the printer to use paper of different weights or thicknesses. When the platen gap adjust lever is moved forward or backward, the carriage guide shaft rotates. This rotation moves the carriage either toward or away fro[...]

Principles of Operation Paper Handling Mechanisms During normal operation, paper is fed to the printer, advanced to the specified position, and ejected from the printer. These paper handling operations are performed by various paper handling mechanisms, such as the tractors, platens, rollers, and gears. This section describes the printer’s paper [...]

Principles of Operation Paper Advance Mechanisms - - This section describes how the friction advance and tractor advance mechanisms work to advance the paper through the printer. Friction Advance Method The paper is held between the platen and paper guide rollers and between the paper tension roller and paper tension unit cover . The paper feed (PF[...]

Principles of Operation Push Tractor Method When the push tractor method is used with the rear entrance, the torque generated by the PF motor is transmitted to the push tractor gear through the PF motor pinion gear, paper advance reduction gear, and tractor reduction gear. When the PF motor pinion gear turns in the direction of the black arrow, the[...]

Pthcipk of Operation - Paper (Continuous) Paper Tension Roller Paper Tension Roller Gear / Platen Gear PF Motor P&h Tractor ‘Push Tractor Gear Figure 6-6. Push Tractor Operation Using the Front Paper Entrance 6-8 - Epson FX-870/I 170[...]

Principles of Operation Pull Tractor Method The pull tractor advances paper in basically the same way as the push tractor. The push tractor is installed at the paper entrance and pushes the paper into the printer mechanism. The pull tractor, however, is installed at the paper exit and pulls the paper out of the printer mechanism. As the result, the[...]

Principles of Operation Push-pull Tractor Method The push-pull tractor method is a combination of the push and pull tractor methods. Two tractors are used to advance the paper: one at the front paper entrance and the other at the rear paper entrance. They operate simultaneously to push and pull the paper through the printer mechanism. Figure 6-8 il[...]

Principles of Operation I Paper Drive Roller / ctor Reduction PF Motor Pinion Gear Gear PF Motor PaDer Advance Reduction Gear l . l . - ’ Platen Gear Paper Drive Roller Gear ush Tractor Gear Push Tractor Figure 6-9. Push-pull Tractor Operation Using the Front Paper Entrance Epson FX-870/1170 6-11[...]

Principles of Operation The Release Lever The release lever is used to select friction or tractor feeding or to release the paper. When the release lever is set to the friction feed position, the paper guide rollers are pressed against the platen. When it is set to one of the tractor feed positions, this pressure is released and the paper guide rol[...]

Principles of Operation Paper Paths This section describes the various paths the paper follows through the printer mechanism. These paper paths are divided into four groups, depending on the entrance the paper is fed from (top, rear, bottom, or front). Note : The front paper-end (PE) sensor is located in front of the printer mechanism and the rear [...]

Prlnclples of Operatbn Rear Entrance Figures 6-13 and 6-14 show the paper paths for tractor feeding using the rear entrance. The rear entrance can be used for any of the following paper feed methods: push tractor feed, pull tractor feed, or the push-pull tractor feed. When the rear entrance is used, the rear PE sensor senses when paper is out. Pape[...]

Principles of Operation Paper (Continuous) Printhead Paper Guide Rollers Figure 6-15. Paper Path for Push-pull Tractor Feeding Using the Rear Entrance Bottom Entrance Figure 6-16 shows the paper path for tractor feeding using the bottom entrance. The bottom entrance is used only for pull tractor feeding. When the bottom entrance is used, the fron[...]

Principles of Operation Front Entrance - Figures 6-17 through 6-20 show the paper paths for the front entrance. The front entrance can be used with any of the following paper feed methods: friction feed, push tractor feed, pull tractor feed, or push-pull tractor feed. When the front entrance is used, the front PE sensor senses when paper is out. Pa[...]

Principles of Operation - Paper (Continuous) Front PE Sensor Lower Paper Guide Roller Figure 6-19. Paper Path for Pull Tractor Feeding Using the Front Entrance Paper Drive Roller Front PE Sensor Tower Paper Guide Roller Push Tractor Figure 6-20. Paper Path for Push-pull Tractor Feeding Using the Front Entrance Epson FX-870/1170 6-17[...]

Principles of Operation Ribbon Advance Mechanism The ribbon is held between the ribbon advance roller (ribbon driving gear) and the ribbon pressure roller. When the carriage moves on the shaft, the timing belt turns the belt driven pulley, and the torque is transmitted to the ribbon driving gear through the gear train. The ribbon driving gear rotat[...]

Principles of Operation Power Supply Operation The FX-870/1170 printer is powered by a 120 VAC power supply board (C076 PSB board assembly). This board outputs the DC current necessary to drive the printer control circuits and the printer drive mechanism. Fuse Fl(2.5 A/125 V) is used to protect the power supply circuit of the board in case of a sho[...]

Pfinciples of Operation The +5 VDC voltage-overload protection circuit cuts the +5 VDC line output ifthe voltage exceeds +7 VDC. It stops the operation of the switching circuit and then the output of +35 VDC voltage. The +35 VDC line has a voltage-overload protection circuit and a voltage drop protection circuit. The +35 VDC voltage-overload protec[...]

a Filter Circuit AC input Principles of Operation Secondary - I I I Full Wave Pectification - Smoothing - $M$ing Smoothing Circuit Circuit . . i I Circuit I I , t +5v Switching Regulator .~~~-~~~~~-~~~~~ +5v Over Current Control Circuit ---------------- +5v _ Photo- + +35 V Line coupler Detector Circuit I ZD51 +t +35 V Line Voltage Overload Prote[...]

Principles of Operation Control Circuit Operation The control circuit consists of two circuit boards: the CO94 MAIN (main control circuit board) and the CO94 PNL (control panel circuit board). This section describes the operation of these boards. Control Circuit Operation Overview The CPU on the CO94 MAIN is an 8-bit TMP9OCO41F microprocessor (9.83[...]

Principles of Operation Figure 6-24 shows the data flow from the host computer to the printhead. Data sent fkom the host computer is converted to image data and transmitted to the printhead through the gate array. CPU I Host computer Image data transfer L I Gate Array (EOSABGYA) + RAM Input buffer Figure 6-24. Data Flow Epson FX-87W1170 6-23[...]

Principles of Operation Table 6-5 lists the fimctiona of the main componente of the CO94 MAIN. Table 6-5. Functions of Main Components of CO94 MAIN IC or Circuit Functions TMP90C041 F (2Cl) Receives data from the host computer and loads it to the input buffer in RAM. Expands the input data held in the buffer to create image data. Loads the image da[...]

Principles of Operation Reset Circuit The control circuits are initialized when the RESET signal is issued. The reset operation occurs under these two conditions: 1. Power on reset Immediately after the power is turned on, +35 VDC is rapidly generated. Because it takes a moment for the voltage at ZD2 to reach +31.5 V, the voltage at the DISC termin[...]

Principles of Operation Sensor Circuits The FX-8’70/1170 printer has the following sensors: CRHOME, PE (FRONT), PE (REAR), PG (platen gap), RELEASE LEVER(RL), and HEAD TEMPERATURE. All the sensors are mechanical switches, except the rear PE sensor, which is a photo diode, and the HEAD TEMPERATURE sensor, which is a thermistor. - In addition to th[...]

Principles of Operation Carriage Motor Drive Circuit The carriage motor drive circuit controls the CR motor. An open loop, constant-current drive arrangement runs the CRmotor. 2-2 and 1-2 phases are used to excite the motor. A 2-2 phase step is equivalent to a 1-2 phase step doubled. Table 6-6 describes the motor drive modes. The CR motor drive cir[...]

Principles of Operation Paper Feed Motor Drive Circuit The PF motor, a stepping motor, advances the paper at a minimum advance rate of l/216 inch. This motor is a 2-2 phase, constant-voltage, drive motor. CPU ports (P70 tc P73) are used to control the PF motor. Phase data for the PF motor is output through these ports. PFA to PFB are turned on or o[...]

Principles of Operation Printhead Drive Circuit The printhead drive circuit receives two types of signals: image data and the pulse length control signals. Image data is created in the CPU, transferred to the gate array, and latched to the printhead. The pulse length control signal is set by the CPU. The pulse length is adjusted referring to the vo[...]

Principles of Operation E 2 PROM Control Circuit Figure 6-31 shows the E2PROM control circuit. The E2PROM is non-volatile memory containing information, such as the top-of-form position. Because the E2PROM is a serial I/O device, the gate array converts the parallel data (sent fiorn the host computer) into serial data. - SCL B5A66YA (IC4) CPU (IC2C[...]

Principles of Operation Component Repair Information (for Dealers Outside the U.S.) This portion of the manual provides additional information for servicers outside the U.S. who need to make repairs to components on the circuit boards. (U.S. service technicians can ignore these pages.) Repairing the C076 PSB Board Assembly This section gives instru[...]

Principles of Operation Table 6-7. Repairing the C076 PSB Board Assembly (Continued) Problem cause Checkpoint Solution The voltage of the Q3, ICl, PCl, Check the voltage waveforms at Q3. Replace Q3, t35 V line is below PC2 or ZD51 is ICl, PCl, the specified value. bad. PC2 or zD51. Q2 is bad. Check the voltage waveforms at Q2. Replace Q2. 6-32 Epso[...]

Principles of Operation Table 6-7. Repairing the C076 PSB Board Assembly (Continued) Problem CalIS@ Checkpoint Solution he +5 V line is The +35 V line is Check the +35 V line. Refer to the ad. bad. items described above. IC51 is bad. Check the oscillation waveform (IC51 pin 5) and the Replace switching waveform (IC51 pin 8). IC51. Q51 or Q52 is bad[...]

Principles of Operation Repairing the C094 MAIN Board Assembly - This section gives instructions for repairing the C094 MAIN board and describes various problems, symptoms, likely causes, checkpoints, and solutions. The checkpoint column shows proper waveforms, resistance values, and other information for each component of the C094 MAIN board. Tabl[...]

Principles of Operation Table 6-8. Repairing the C094 MAIN Board Assembly (Continued) Problem Symptom Cause Checkpoint Solution Abnormal The CPU operation at does not power on. operate properly. The CPU is Check the oscillator signal (IC2Cl pin 27 or If the signal is defective. pin 28). not correct, replace IC2Cl. Otherwise, replace CRl. Carriage T[...]

Principles of Operation Table 6-8. Repairing the C094 MAIN Board Assembly (Continued) Problem Symptom Cause Checkpoint Solution Self-test The printer IC4 is Check the head pulse signal at pin 31 (input) Replace IC4. printing does not print defective. and pin 63 (output). abnormal the self-test. Self-test printing abnormal. A particular dot fails to[...]

Principles of Operation Table 6-8. Repairing the C094 MAIN Board Assembly (Continued) Problem Symptom Cause Checkpoint Solution Paper feed The printer ICl is Check the input signal (pin 2) and the output Replace ICl abnormal. does not feed defective. waveform (pin 3). the paper at all or the paper feed is irregular. Incorrect Data is Either IC4 or [...]

Reference Materials Chapter 7 Reference Materials Connector Summar y ................................................................................. 7-1 Circuit Diagram s ...................................................................................... 7-5 Circuit Board Component Layout s .....................................................[...]

Reference Materials 7 Connector Summary Figure 7-1 illustrates the interconnection of the primary components. Table 7-1 summarizes the functions and sizes of the connectors. AC IN 7 4 CNl (CN2k CO76 PSB BOARD ASSEMBLY L I CO94 MAIN BOARD ASSEMBLY (1 1 CN4 t 1 CN6 1 +iiq 1 CN13 1 I I + I PRINTER MECHANISM I PF MOTOR ASSEMBLY t I CO94 PNL BOARD ASSEM[...]

Reference Materials Table 7-1. CO94 MAIN Board Connector Summary Board CO94 MAIN Board Assembly Connector CNl CN2 CN3 CN4 CN5 CN6 CN7 CN8 CN9 CN12 CN13 CN14 Function Host Computer 36 Optional Interface 36 Front PE Sensor 2 (Blue) Release (RL) Sensor 2 (White) Gap (PG) Sensor 2 (Black) PF Motor Assembly 6 Home Position (HP) Sensor 2 (Yellow) Printhe[...]

Reference Materials See Table 1-14 for CNl (Centronics interface) signal functions and pin assignments. Table 7-2. CN2, Optional I/F Table 7-3. CN3, Front PE Sensor (CO64 MAIN Hoard Assembly) (CO94 MAIN Hoard Assembly) No. I I l/O Signal Name Function 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36[...]

Reference Materials I W. l/O Signal Name Function 1 - +5 +5 VDC 2 0 READY READY LED 3. 0 STAT STAT LED ( Not equipped) 4 0 FONT FONT LED 5 0 COND ‘CONDENSED LED 6 I PAUSE PAUSE Button 7 I FONT FONT Button 8 I PFEED PAPER FEED Button 9 I OPERA OPERATE Button 10 - GND Signal Ground 7-4 Epson FX-870/1170 Table 7-8. CNS, Printhead Table 7-11. CN13, C[...]

Reference Materials Circuit Diagrams 0,‘ B:,& OTC1132 sE:IOK I A /I/II/II III ,,,, I Il/IIl/II I I I I I I ’ II Head Conrrol /IIm O,‘” Ill i - Pf Molar Control CNL LE<ER ( CYS G&P ( CN3 PEFRNT ( CNS PERAEFI ( Pf Motor Ower Figure 7-2. C094 MAIN Board Assembly Circuit Diagram (Annotated) 7-5 Epson FX-870/1170[...]

Reference Materials . I = - - - - - - Figure 73. C094 MAIN Board Assembly Circuit Diagram 7-6 Epson FX-87CY1170[...]

Surge Current ProtectIon 2.5A,125V CNI L IOO-12OVAC C6 0 I I 0 O.,u,‘AC250V FG , R4 o.3gs R7 16K _ iV Over I CB T 220Op/lKV _ 3 ZJI X1 : HEAT SINK I P *, 051 ‘-9; FMP-G125 t5V DC Reourator Clrcult LPZOl-2R5SO R RW II tection II C58 O.Olu 1 I 7 ct-42 PSC +35V/O.?A -I F F , +SV/I.OA 3 Psc PO. 7A F F , +5V/l.OA c57 1 L7OOp/ IKV !Or 7 FG C076 PSB P[...]

CN2 PSC CB T’ I PT-0’ THI Bohm/25C C6 0 II I 4, 0.1 u/ACZ%,V It- = F-G ,I- !, (L2) 2200p/lKV _ 3’ R5 = lOK/ 2w Cl2 -- 01 L70pRKV AGOI _ 2. C r CSl 33ooun1 5ov C52 33oou 5ov a_ C56 -- 22oop 1 KV z%p 22”dP ‘-T t- i FG ELF160290M -2- O.Z2u/AC250V 1 c.57 1 A7oOp/ 1KV ? FG I- Fl 2.5A,‘125V *l : HEAT SINK !N! 100-120VAC CO76 PSB Power Supply [...]

Reference Materials CNI GND *OPERA 0 SW4 , *PAPER FEED t&-----h “’ 0 *FONT rPAUSE/l-OFF CONDENSED FONT STATUS o7 *SW3 0 o6 ij-L SW2 0 5 LED3 N 0 4 1/1 LED2 N I 2 L/I LED1 N 41 Note: The STATUS LED is not implemented in this model. Figure 7-6. CO94 PNL Board Assembly Circuit Diagram Epson FX-870/1170 7-9[...]

Reference Materials Circuit Board Component Layouts PF Motor e.m PF Motor Parallel hlterface /CNl PG Sensor c cN5 Ett CN7 - PE Rear/ %i / PE Front EY Y I I Printhead P&iead zeyi Drivers EN3”” CN12 CN2 - Figure 7-7. CO94 MAIN Board Assembly Component Layout !z?Rm 7-10 Epson FX-870/1170[...]

Reference Materials n EEm EPS-I I MODEL 1 Figure 7-8. CO76 PSB Board Assembly Component Layout Epson FX-870/1170 7-11[...]

Reference Materials 6 I.202 lmal pJ z- fi L2DJ cl LLD I cl----, -I I I : : CO94 PNL Sw2 ASSY 2006160 00 I I q 0 FL+ i 16 I A,--4 SW4 SW3 SWI CMK- 54x1 Am Note: The STATUS LED is not implemented in this model. Figure 7-9. CO94 PNL Board Assembly Component Layout 7-12 Epson F&870/1 170[...]

Reference Mater& Outline Drawings I r --- I 380 ’ I I I I i I Figure 7-10. FX-870 Case Outline Drawing Epson FX-870/1170 7-13[...]

Reference Materials I L I r-r-=- I I r- 01 - - - z -- Figure 7-11. F’X-1170 Case Outline Drawing 7-14 - Epson FX-870/1170[...]

Index Symbols +35 V 3-1, 6-19, 6-25, 6-28, 6-29 line 6-31, 6-32 monitor circuit 6-26 detector 6-19 +5 V 3-1, 3-4, 6-19, 6-25, 6-28 line 6-33 136-column 1-10, 4-8, 5-2 80-column 1-8,4-8,5-2 A abbreviations 4-3 Abicomp 1-21 AC power 3-1, 4-1, 6-19 outlet 2-1, 6-31 source 6-20 accessories 1-34 ACKNLG 1-13 addresses vii adjust 4-1 lever 1-24, 3-2, 4-11[...]

Index blinking 1-19 bond paper 1-7 bottom entrance 6-9, 6-15 box driver 5-1 BRASCII 1-21 buffer 1-1, 1-13, 1-15, 1-17, 1-22, 1-24, 1-26, 6-24 full printing 1-24 bushing 5-1 BUSY 1-13, 6-29 /READY 3-8 buttons 1-17 buzzer 1-27, 3-6, 6-2 C C076 PSB board 1-28, 1-30, 4-23, 4-24, 6-19, 6-31, 6-32, 6-33 C094 MAIN board 1-28, 1-29, 3-6, 3-7, 3-18, 4-9, 4-[...]

Index common 3-2, 3-3 communications errors 3-7, 3-8 component 1-28, 6-34 layouts 7-10 repair 6-31 condensed 1-12, 1-17, 1-18, 1-19 connector 1-14, 3-1, 3-3, 4-9, 4-12, 4-23, 4-24, 7-2 locations 3-18 summary 7-1 continuity 3-1, 3-4 continuous paper 1-1, 1-5, 1-9, 1-17,6-5 control circuit 6-22 codes 3-21 through 3-24 panel 1-17, 1-22, 1-23, 1-28, 1-[...]

Index dot 6-1 wires 3-3 double-space 3-7, 3-17 draft 1-13, 1-18, 1-19,5-4 drive circuit 6-24, 6-27, 6-28,6-29 roller assembly 5-6 signals 6-1 voltage 6-1 driver 3-2, 3-4, 3-6 carriage motor 3-4 paper feed motor 3-4 printhead 3-4 selections 1-33 driving wires 6-1 dust 5-5 duty 1-24 cycle 1-11, 2-4 E ETROM 1-27, 2-1, 3-5, 3-7,5-3, 6-24 control circui[...]

Index font 1-12, 1-17, 1-18, 1-19, 1-20, 1-21, 1-22, 5-4 form feed 1-24 frame 4-11 ground connector 2-2 left 4-11, 4-18 right 4-11 France 1-21 frequency range 1-11 friction 6-5, 6-6 feed 1-4, 1-5, 6-13, 6-16 mechanism 1-5 front cover 4-5 entrance 6-7, 6-8, 6-10, 6-11,6-16, 6-17 feed 1-35 insertion 1-8 PE sensor 1-24, 3-2, 3-20,4-19,6-13,6-15, 6-16,[...]

Index pulse signal 6-36 temperature 6-26 thermistor 1-19,3-5 heat 6-2 sink 4-24,6-31 hex dumps 1-23,3-21, 3-23 codes 3-21 through 3-24 high capacity cut-sheet feeder 1-3 duty printing 1-24 speed draft 1-1, 1-13 voltage error 1-19,3-5 home position 1-26,2-1,3-2,3-6,3-7,3-19,4-18,6-3,6-4,6-26,7-3 sensor 1-26,3-2, 3-6,3-7,3-19, 4-18, 6-26, 7-3 hooks 4[...]

Index italic 1-21, 3-8 Italy 1-21 L labels 1-4, 1-5, 1-6 layout 1-29 diagram 3-18, 7-10 LEDs 1-19, 2-1 left frame 4-11, 4-18 length 1-6 lever adjust 1-24, 3-2,4-11, 5-1, 6-4 release 1-5, 1-24, 1-27, 3-2, 3-5, 4-13, 4-14, 5-1, 6-6, 6-7,6-12,6-26 life 1-33 line spacing 1-4, 1-26 lines 1-23 load paper 3-7 loading 1-24 position 1-18, 1-27 logic level 1[...]

Index N NLQ 1-13, 1-18, 1-19, 5-4 noise 1-15, 6-19 non-volatile memory 1-18, 1-20, 1-22, 1-23, 1-26, 6-30 null modem cable 2-2 O ohms 3-2, 3-3 oil 5-5 pad 5-6 open 3-2, 3-4 OPERATE 1-17, 3-1 operating modes 1-33 optional I/F 1-16,7-3 boards 1-1, 1-3, 3-7,3-8,4-23 oscillation waveform 6-33 oscillator 6-35 oscilloscope 4-1 outlet 2-1, 6-31 outline dr[...]

Index tension roller 6-6, 6-7 gear 6-6 unit 1-5,6-9 thickness 1-25 width 1-8 parallel 1-34, 3-6 cable 2-2 interface 1-3, 1-13, 2-1, 6-29 parallelism adjustment bushing 3-6, 4-11, 5-1, 5-2,5-3 parameters 1-22 parity 2-4, 3-7 Parts Order Services 4-24 path l-l, 6-13, 6-14, 6-15 PAUSE 1-17, 1-18, 1-19, 1-21, 1-22, 1-24, 5-4 /TEAR OFF 1-17 PE (paper en[...]

Index consumption 1-11 on 1-22, 3-6, 3-7, 3-9, 3-10, 6-34 default settings 1-13, 1-22 hours 1-11 reset 6-25 sequence 2-1 outlet 2-1,6-31 supply 1-28, 1-30, 3-1, 3-4, 4-1, 4-4, 4-23, 4-24, 6-19, 6-31 through 6-33, 7-4 voltage 3-5, 3-6 precautions 4-1 preventive maintenance 5-5 primary circuit 3-1, 4-1, 4-4, 6-20, 6-31 print buffer 1-1, 1-13, 1-15, 1[...]

Index. gears 3-6, 5-6, 6-18 READY 1-17, 1-19 rear entrance 6-7, 6-10, 6-14 feed 1-35 frame 4-11 paper guide 4-20 PE sensor 1-24, 3-2, 3-20, 4-19, 6-13, 6-14, 6-26, 7-4 recycled paper 1-6, 1-7 reduction gear 6-6, 6-7 reference voltage 6-26 release error 3-5 lead 4-20 lever 1-5, 1-24, 1-27, 3-2, 3-5,4-13, 4-14, 5-1, 6-6, 6-7, 6-12, 6-26 sensor 3-19, [...]

Index schematics 7-5 through 7-9 screwdriver 4-1 screws 4-3 secondary circuit 2-1, 3-1, 4-1, 4-4, 6-20 self-test 1-22, 2-1, 3-6, 6-36 sensor 1-31, 3-1, 3-2, 3-6, 3-7, 4-18, 4-19, 4-20, 6-3, 6-19 circuits 6-26 front PE 1-24, 3-2, 3-20, 4-19, 6-13, 6-15, 6-16, 6-26, 7-3 HP 1-26, 3-2, 3-6, 3-7, 3-19, 4-18, 6-3, 6-26, 7-3 locations 3-19 rear PE 1-24, 3[...]

Index T tear-off 1-17, 1-18, 1-19, 1-20, 1-24, 1-27 temperature 1-6, 1-7, 1-11, 2-1, 6-2, 6-26 tension spring 4-12 test pins 3-2 points 3-1 through 3-4 tests 3-1 text mode 1-12 thermal protection 1-24 thermistor 2-4, 3-3, 3-5, 6-2, 6-26 thick paper 1-4, 1-5 thickness 1-6, 1-7, 1-8, 1-25, 4-1,6-4 gauge 4-1,5-2 thin paper 1-4 timeout 2-4, 3-8 timers [...]

Index voltage 1-19, 1-24, 3-1, 3-5, 3-6 change 6-2 detector 6-19 drop protection circuit 6-20 error 1-19, 1-27, 3-5 input 6-19 monitor circuit 6-26 output 6-19 overload protection circuit 6-20 range 1-11 supply 6-19 volts 3-1 Vref circuit 6-26 W wall switches 2-1 WARNING 4-1, 4-4, 4-24, 3-1 washers 4-3 waveform 6-31, 6-32, 6-33, 6-34, 6-37 weight 1[...]