Samsung ML-1200 manual

SERVICE LASER PRINTER ML-1200 Series ML-1210 / ML-1250 / ML-1220M Manual LASER PRINTER CONTENTS 1. Precautions 2. Specifications 3. Disassembly and Reassembly 4. T roubleshooting 5. Exploded Views and Parts List 6. Block Diagram 7. Connection Diagram[...]

© Samsung Electronics Co.,Ltd. October . 2001 Printed in Korea. VERSION NO. : 2.03 CODE : JC-0051A This service manual is also provided on the web, the ITSELF system Samsung Electronics Co., Ltd. http://itself.sec.samsung.co.kr[...]

This manual is stated and provided for service description. All rights reserved. Any parts of the information in this manual are pr ohibited from fr ee duplication, use or translation without prior written approval except in cases allowed by the Copyright Act. Specifications are subject to change without prior notice. Copyright (c) 2001. 5. Samsung[...]

Precautions 1-1 Samsung Electronics 1. Precautions 1-1 Safety Precautions 1-2 Precautions on Disassembly and Reassembly Please read the following carefully to prevent any accidents and not to damage the unit during service. 1. Safety Precautions There are some electric or machinery parts with safety related property . If the parts replaced are dif-[...]

Precautions 1-2 Samsung Electronics 1-3 T ools for T roubleshooting The following tools are recommended for safe and smooth troubleshooting described in this service manual. DCU(Diagnostic Control Unit) Standard: T est equipment to diagnose the Laser printer supplied by Samsung Electronics. DVM(Digital V olt Meter) Standard: Indicates more than 3 d[...]

Specifications 2-1 Samsung Electronics 2. Specifications Speed Resolution FROP(Fist Power On T ime) W arm-Up T ime Power Consumption Dimension Weight Processor Memory Emulation Interface OS Support N/W Input Output Manual Media T ype T ype Life Cartridge Pick up Roller Feed Roller T ransfer Roller Fuser Key & LED LCD T oner Save Reprint Engine [...]

3-1-1 Front Cover 1. Pull the both side of the cover to open. 2. Remove a screw and remove the stopper that holds the printer cover . 3. Loosen the right lower part of the cover , then push the cover in the direction of arrow to loosen the left lower part. 4. Remove a screw of the front cover PCB and remove the connector , then remove the cover . 3[...]

Disassembly and Reassembly 3-2 Samsung Electronics 3-2 LED Panel PBA 1. Before you remove other covers, you should remove. • Front Cover (see [3-1 Main Cover]) 2. Remove two screws of PCB cover , and widen the hooks( ) to remove. 3. Remove two screws, and remove LED panel. 4. Remove PCB from the PCB cover . 3-3 LSU(Laser Scanning Unit) 1. Before [...]

Disassembly and Reassembly 3-3 Samsung Electronics 3-4 T ransfer Roller 1. Open the front cover . 2. Use a proper tool("-" type screwdriver) to pull the one end of the roller slightly , then take it out. 3-5 Motor Assembly 1. Before you remove the motor assembly , you should remove: • Main Cover (see [3-1 Main Cover]) • Shield Engine [...]

Disassembly and Reassembly 3-4 Samsung Electronics 3-6 HVPS Board 1. Before you remove HVPS board, you should remove: •Main Cover (see [3-1 Main Cover]) 2. Remove four screws and a connector from HVPS board, then take the board out. 3-7 Fuser Assembly 1. Before remove fuser assembly , you should remove: • Main Cover (see [3-1 Main Cover]) 2. Re[...]

Disassembly and Reassembly 3-5 Samsung Electronics 3-8 Thermostat and Halogen Lamp 1. Remove a screw from the fuser assembly and remove the thermostat cover , then remove two screws securing the thermostat. 2. Remove two screws from the fuser assembly , and take the Heat Roller out. 3. T ake the halogen lamp out from the Heat Roller . Note When you[...]

Disassembly and Reassembly 3-6 Samsung Electronics 3-9 SMPS Board 1. Before you remove the SMPS board, you should remove: • Main Cover (see [3-1 Main Cover]) 2. Remove screws in the order of then remove the shield engine assembly . 3. Unplug connectors from the main board and connec - tors from SMPS, then remove the SMPS. Remove four screws from [...]

Disassembly and Reassembly 3-7 Samsung Electronics 3-10 Main Board and Sensor Board 1. Before you remove the main board, you should remove: • Main Cover (see [3-1 Main Cover]) • SMPS board (see [3-9 SMPS Board]) 2. Remove two screws from the main board and unplug all of connectors, then remove the board. 3. Release four snap-fits securing the i[...]

T roubleshooting 4-1 Samsung Electronics 4. T roubleshooting 4-1 How to use DCU 4-1-1 DCU Setup ......................................Page(4-2) 4-1-2 Code ................................................Page(4-2) 4-1-3 Self Diagnostic Mode ......................Page(4-3) 4-1-4 Self T est Button ................................ Page(4-4) 4-1-5 Paper[...]

T roubleshooting 4-2 Samsung Electronics 4-1 How to use DCU 4-1-1 DCU Setup Y ou can examine the malfunction of the printer . T o perform DCU, open the front discharge cover and leave the connect the harness wire(10 pin/4 pin) to the CN10(4 pin) of the Main control board. 4-1-2 Code Connect DCU to the printer and turn the power on. It show 7 LED on[...]

T roubleshooting 4-3 Samsung Electronics 4-1-3 Self Diagnostic Mode If Error code occurs due to malfunction of the printer , perform Self Diagnostic Mode to solve the problem. The printer works only in the self-test mode to solve the malfunction problem. T o enter the self-test mode, turn the power on pressing the buttons of [Down], [Shift] and [St[...]

T roubleshooting 4-4 Samsung Electronics 13. THV(+) TRIGGER. ALL HV All high voltage output by each HV terminal and LSU and the fan is in operation. In this mode, electronic resistance of transfer roller and high voltage is detected. If no toner cartridge in the printer , output of THV is +199V ~ + 2100V . 14. PTL T est Indicates the PTL LED. 15. F[...]

T roubleshooting 4-5 Samsung Electronics 4-2 The cause and solution of Bad image 4-2-1 V ertical Black Line and Band • Description 1. Straight thin black vertical line occurs in the printing. 2. Dark black vertical band occur in the printing. Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Check and Cause Solution [...]

T roubleshooting 4-6 Samsung Electronics 4-2-3 Horizontal Black Band • Description 1. Dark or blurry horizontal stripes occur in the printing periodically . (They may not occur periodically .) Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Check and Cause Solution 1. Bad contacts of the voltage terminals to develo[...]

T roubleshooting 4-7 Samsung Electronics 4-2-5 Light Image • Description The printed image is light, with no ghost. Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Check and Cause Solution 1. Develop roller is stained when the toner of developer cartridge is almost con- sumed. 2. Ambient temperature is below than 1[...]

T roubleshooting 4-8 Samsung Electronics 4-2-7 Uneven Density • Description Print density is uneven between left and right. Check and Cause Solution 1. The pressure force on the left and right springs of the transfer roller is not even, the springs are damaged, the transfer roller is improperly installed, or the trans- fer roller bushing or holde[...]

T roubleshooting 4-9 Samsung Electronics 4-2-9 Ghost (1) • Description Ghost occurs at 75 mm intervals of the OPC drum in the whole printing. Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer 75mm Check and Cause Solution 1. Bad contacts caused by contamination from toner particles between high voltag[...]

T roubleshooting 4-10 Samsung Electronics 4-2-1 1 Ghost (3) • Description White ghost occurs in the black image printing at 32mm intervals. Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer 32mm Check and Cause Solution 1. The life of the developer may be expired. 2. The abnormal voltage and bad conta[...]

T roubleshooting 4-11 Samsung Electronics 4-2-14 Satins on Back of Page • Description The back of the page is stained at 47mm intervals. Digital Digital Pri Digital Printer Digital Printer Digital Printer Check and Cause Solution 1. T ransfer roller is contaminated. 2. Pressure roller is contaminated. 1. Perform the OPC Cleaning Mode Print 2 or 3[...]

T roubleshooting 4-12 Samsung Electronics 4-3 The cause and solution of the bad discharge 4-3-1 Wrong Print Position • Description Printing begins at wrong position on the paper . Check and Cause Solution Wrong sense time caused by defective feed sensor actuator . Replace the defective actuator (Service Parts : Figure 8-16 , chapter 5) 4-3-2 JAM [...]

T roubleshooting 4-13 Samsung Electronics 4-3-4 JAM 2 • Description 1. Recording paper is jammed in front of or inside the fuser . 2. Recording paper is stuck in the discharge roller and in the fuser just after passing through the Actuator-Feed. EXIT 2 EXIT 1 CARTRIDGE CARTRIDGE PICK UP EXIT SENSOR FEED SEN LSU LSU JAM 2 Check and Cause Solution [...]

T roubleshooting 4-14 Samsung Electronics 4-3-5 Multi-Feeding • Description Multiple sheets of paper are fed at once. Check and Cause Solution 1. Solenoid malfunction(the solenoid does not work properly): Perform DCU mode : solenoid check 06. 2. Pad-Friction is contaminated with foreign matter .(oil...) 3. The face of paper is blended. 1. Replace[...]

T roubleshooting 4-15 Samsung Electronics 4-3-7 OPC • Description Paper is rolled up in the OPC. Check and Cause Solution 1. Paper is too much thin. 2. The face of paper is curled. 1. Recommend to use normal paper . 2. How to remove the rolled paper in the OPC. • Remove the paper while turning the OPC against the ongoing direction. • Clean fi[...]

T roubleshooting 4-16 Samsung Electronics 4-4 The cause and solution of the malfunction 4-4-1 All LEDs blinking (Fuser Error) • Description 1. All the lamps on the operator panel blink. 2. Gear of the fuser does not work and breaks away melt away . When printing, motor breaks away from its place due to defective fuser gear . Check and Cause Solut[...]

T roubleshooting 4-17 Samsung Electronics 4-4-3 Not function of the gear of the fuser due to melting away • Description The motor breaks away from its place due to gear melting away . Check and Cause Solution DCU Mode : Check if the Error States '60' '62' '68' occur . Check the operation of Fuser Erasing Lamp On/Of f[...]

T roubleshooting 4-18 Samsung Electronics 4-4-6 Cover Open • Description The ERROR lamp is on even when the print cover is closed. Check and Cause Solution 1. The hook lever in the top cover may be defective. 2. Check the connector and circuit of the cover switch department in the Main Control board. Perform DCU mode : If Error state '64&apo[...]

T roubleshooting 4-19 Samsung Electronics 4-4-9 Defective motor operation • Description Main motor is not driving when printing, and paper does not feed into the printer , resulting 'Jam 0'. Check and Cause Solution 1. Motor harness or sub PCB may be defective. 2. Perform DCU diagnostic code 00 and Check the motor operation. 1. Check th[...]

T roubleshooting 4-20 Samsung Electronics 4-4-1 1 V ertical Line Getting Curved • Description When printing, vertical line gets curved. Check and Cause Solution 1. If the supply of +24v is unstable in the Main Control board linking with LSU, check drive by DCU Mode: LSU Check -05- LSU Motor on. 1. Replace LSU. (Service Parts : Figure 13, chapter [...]

T roubleshooting 4-21 Samsung Electronics 4-5 T oner Cartridge Service It is not guaranteed for the default caused by using other toner cartridge other than the cartridge supplied by the Samsung Electronic or caused by non-licensed refill production. 4-5-1 Precautions on Safe-keeping of T oner Cartridge Excessive exposure to direct light more than [...]

T roubleshooting 4-22 Samsung Electronics 4-5-4 Signs and Measures at Poor toner cartridge Fault Signs Cause & Check Solution Light image and partially blank image (The life is ended.) T oner Contamination • The printed image is light or unclean and untidy . • Some part of the image is not print- ed. • Periodically a noise as "tick t[...]

T roubleshooting 4-23 Samsung Electronics Fault Signs Cause & Check Solution White Black spot Recycled product • Light or dark black dots on the image occur periodically . • White spots occur in the image period- ically . • Poor appearance of the developer . • Unclean and rough printouts. • Bad background in the image. 1. If light or [...]

T roubleshooting 4-24 Samsung Electronics Fault Signs Cause & Check Solution Ghost & Image Contamination • The printed image is too light or dark, or partially contami- nated black. • T otally contaminat- edblack. (Black image print- ed out) • The density of print- outs is too dark and ghost occurs. 1. The printed image is too light o[...]

T roubleshooting 4-25 Samsung Electronics 4-6 The cause and solutions of bad environment of the software 4-6-1 The printer is not working (1) • Description While Power turned on, the printer is not working in the printing mode. Check and Cause Solution 1. Run Self-T est Mode: T urn the power on while pressing the test printing button for 2 or 3 s[...]

T roubleshooting 4-26 Samsung Electronics 4-6-2 The printer is not working (2) • Description After receiving the printing order , no response at all or the low speed of printing occurs due to wrong setup of the environment rather than malfunction of the printer itself. Check and Cause Solution 1. Secure more space of the hard disk. 2. Printing er[...]

T roubleshooting 4-27 Samsung Electronics 4-6-3 Abnormal Printing • Description The printing is not working properly even when the cable has no problem. (even after the cable is replaced) If the printer won't work at all or the strange fonts are repeated, the printer driver may be defec - tive or wrong setup in the CMOS Setup. Check and Caus[...]

T roubleshooting 4-28 Samsung Electronics 4-6-4 SPOOL Error • Description T o spool which stands for "simultaneous peripheral operations online" a computer document or task list (or "job") is to read it in and store it, usually on a hard disk or larger storage medium so that it can be printed or otherwise processed at a more c[...]

• Deal drawings and service parts are declared for the items with higher rate of inferiority and replaceable in the level of service description only . • If inferiority occurs, you can replace the parts by the unit declared in deal drawings and service items. Exploded Views and Parts List 5-1 Samsung Electronics 5. Exploded V iews and Parts Lis[...]

O : Service available X : Service not available Exploded Views and Parts List 5-2 Samsung Electronics 5-1 Exploded Views and Parts List No. Description SEC.Code Q’ty SA Remark 1 ELA UNIT -CVR FRONT * 1 X 1-1 PBA SUB-LED P ANEL JC92-01280A 1 O 1-2 PMO-COVER FRONT refer to the table ⇒ 1O 1-3 CBF HARNESS-FRONT P ANEL JC39-001 12C 1 O 1-4 PMO-COVER[...]

Exploded Views and Parts List 5-3 Samsung Electronics 8-13 8-14 13 12 11 12-1 8 6 7 4 3 8-4-2 8-4-1 8-4 10 9 5 8-12 8-17 8-16 8-25 8-29 8-28 8-10 8-15 8-1 1 8-9 8-8 8-7 8-1 8-6 8-3 8-2 8-20 8-21 8-24 8-23 8-22 8-30 8-5 8-27 8-19 8-18 8-26 1-2 1-2’ 1-7 ML-1210 / ML-1250 ML-1220M 1-1 2 1 1-2 1-5 1-6 1-4 1-3 M L - 1 2 1 0 / 1 2 5 0 M L - 1 2 2 0 M M[...]

Exploded Views and Parts List 5-4 Samsung Electronics 5-2 Front Assembly SAMSUNG SAMSUNG 0 0 ’ 2 2 2 ’ 10 8 6 1 10 4 5 3 11 7 12 9 SAMSUNG 13 ML-1210 / ML-1250 ML-1210 / ML-1250 ML-1220M ML-1220M NO DESCRIPTION 0 ELA HOU-COVER FRONT ELA HOU-COVER FRONT 1 CBF-HARNESS-P ANEL MAIN 2 PMO-COVER FRONT 3 PMO-GUIDE ST ACKER 4 PMO-DOOR FACE UP 5 PPR-SHE[...]

Exploded Views and Parts List 5-5 Samsung Electronics 5-3 Engine/Frame Lower Assembly 2-17 2-3-2 2-3-1 2-7 2-7-3 2-7-1 2-7-2 2-9-1 2-9-2 2-9-4 2-9-3 2-8 2-9 2-10 3-3 3-3-1 3-2-3 3-2-1 2-3 2-12 2-15 2-14 2-13 3-2 3-2-2 3-2-3 3-2-1 3-2-4 3-43 3-44 3-12 3-5 3-17 3-6 3-6 3-4 3-15 2-11 1 2-16 2-16-2 2-16-1 3 3-41 3-25 3-16 3-24 3-22 3-23 3-21 3-8 3-7 3-[...]

Exploded Views and Parts List 5-6 Samsung Electronics 5-4 Fuser Assembly 15 15-2 15-1 14 14-2 14-1 10 17 22 11 18 4 12 2 7 13 9 5 1 8 6 19 3 20 S-1 S-1 S-1 S-2 0 24 30 29 27 26 28 21 24 23 25 17 16 NO DESCRIPTION 0 ELA HOU-FUSER ASS ’ Y 1 THERMISTOR-NTC 2 THERMOST A T-150C 3 LAMP-HALOGEN 4 PMO-COVER FUSER 5 PMO-BUSHING H/R, L 6 PMO-BUSHING H/R, R[...]

Exploded Views and Parts List 5-7 Samsung Electronics 5-5 Shield Engine Unit Assembly 1-2 1 1-1 3 S-1 2 0 S-2 S-3 NO DESCRIPTION 0 ELA HOU-SHIELD ENGINE 1 MEC-SHIELD BRKT CONTROLLER 1-1 IPR-SHIELD ENGINE 1-2 IPR-BRKT CONTROLLER 2 PCT -INSULA TOR SMPS 3 CBF HARNESS-INLET ASS ’ Y S-1 SCREW-MACHINE S-2 SCREW-T APTITE S-3 SCREW-T APTITE[...]

Exploded Views and Parts List 5-8 Samsung Electronics 5-6 RX Drive Assembly NO DESCRIPTION 0 ELA HOU-RX DRIVE 1 MOTOR-STEP 2 PMO-GEAR_71/28 3 PMO-GEAR_73/22 4 PMO-GEAR_132/19 5 IPR-BRKT_MOTOR 6 IPR-BRKT_GEAR 7 CBF-HARNESS_MOTOR S-7 SCREW-MACHINE 5-7 Plate-Upper Unit Assembly 0 6 4 4-1 4-2 4-3 2 2 3-1 3-2 3-3 3-3 3 4 4-1 4-2 4-3 5 1 NO DESCRIPTION 0[...]

Block Diagram 6-1 Samsung Electronics 6. Block Diagram 6-1. Block Diagram(GDI) MA I N S3C 46M 0X SD RAM (8 M B ) SM P S En g i n e PA N E L B' D FL AS H MEM O RY (0. 5 M B ) PO W E R CO R D +2 4V MOT O R FA N EX I T SE N SO R HV P S B' D MHV OPC G N D SU P PL Y DE V TH V BU F F ER MH V P W M BI ASP W M THV P W M PO WE R SW IT C H IN - L E[...]

Block Diagram 6-2 Samsung Electronics 6-2. Block Diagram(PCL) MA I N S Option Up to 68MB DR A M (4 (2MB) MB ) LS U En g i n e PA N EL B' D FL AS H MEM O RY PO W E R CO R D +2 4V MOT O R SO L EN O I D FA N EX I T SE N SO R HV P S B' D MHV OPC G N D SU P PL Y DE V TH V MH V P W M BI ASP W M THV PWM POWER SWITCH LE D 4 3 KEY IE E E 12 84 C A[...]

Connection Diagram 7-1 Samsung Electronics 7. Connection Diagram 7-1. Connection Diagram(GDI) 1 2 3 4 5 6 7 8 9 10 11 1 2 3 4 5 1 2 3 4 5 6 +2 4V _ T +2 4V GND *P MOTO R +3 . 3V EX T _CLK *H S Y N C +5 V +5 V GND *L D _ O N VD O +5 V G N D LSU POL Y G ON MO T O R LD D I O D E +5 V +5 V G ND LE D _ E RROR LE D _P A P E R LE D _D AT A LE D _T O N E R[...]

Connection Diagram 7-2 Samsung Electronics 7-2. Connection Diagram(PCL) 1 2 3 4 5 6 7 8 9 10 11 +2 4V _ SLEEP +2 4V GND * P LREADY* MOT O R EX T _ C L K * HS Y NC +5 V +5 V GND * LD_ ON VD O +5 V G N D LSU POL Y G ON MO T O R LD D I O D E +5 V +5 V G ND KEY_TONER* KEY_CANCEL* KEY_DEMO* 1 2 3 4 5 6 7 8 9 LE D DIS P L A Y PA N E L 1 2 3 4 5 6 7 8 9 +[...]

Repair Manual Repair Manual 1. Block Diagram 2. Connection Diagram 3. Schematic Diagrams CONTENTS LASER PRINTER ML-1200 Series[...]

1 1-1 Samsung Electronics BLOCK DIA GRAM Repair Manual 1. Bloc k Dia gr am 1.1 GDI Block Diagram(ML-1210/ML-1220M) MA I N S3C46M 0X SD RAM (8 M B ) SM P S En g i n e PA N EL B' D FL AS H MEM O RY (0. 5 M B ) PO W ER CO R D +2 4 V MOT O R FA N EX I T SE N SO R HV P S B' D MHV OPC G N D SU P PL Y DE V TH V BU F F ER MH V P W M BI ASP W M TH[...]

1-2 BLOCK DIA GRAM Samsung Electronics Repair Manual MA I N S Option Up to 68MB DR A M (4 (2MB) MB ) LS U En g i n e PA N EL B' D FL AS H MEM O RY PO W ER CO R D +2 4 V MOT O R SO L EN O I D FA N EX I T SE N SO R HV P S B' D MHV OPC G N D SU P PL Y DE V TH V MH V P W M BI ASP W M THV PWM POWER SWITCH LE D 4 3 KEY IEE E 12 84 C A B LE Osci[...]

2 2-1 Samsung Electronics CONNECTION DIAGRAM Repair Manual 2. Connection Dia gr am 2.1 GDI Connection Diagram(ML-1210/ML-1220M) 1 2 3 4 5 6 7 8 9 10 11 1 2 3 4 5 1 2 3 4 5 6 +2 4V _ T +2 4V GND *P M OT O R +3 . 3V EX T _ C LK *H S Y N C +5 V +5 V GND *L D _ O N VD O +5 V G N D LSU POL Y G ON MO T O R LD D I O D E +5 V +5 V G N D L E D _ E RROR LE D[...]

2-2 CONNECTION DIAGRAM Samsung Electronics Repair Manual 1 2 3 4 5 6 7 8 9 10 11 +2 4 V _ SLEEP +2 4V GND * P LREADY* MOT O R EX T _ C LK * HS Y NC +5 V +5 V GND * LD_ ON VD O +5 V G N D LSU POL Y G ON MO T O R LD D I O D E +5 V +5 V G ND KEY_TONER* KEY_CANCEL* KEY_DEMO* 1 2 3 4 5 6 7 8 9 LE D DIS P L A Y PA N E L 1 2 3 4 5 6 7 8 9 +5 V PT L PT L L[...]

3 3-1 Samsung Electronics SCHEMA TIC DIAGRAMS Repair Manual 3. Schema tic Dia gr ams 3.1 GDI Main Circuit Diagram (1/5)[...]

3-2 SCHEMA TIC DIAGRAMS Samsung Electronics Repair Manual Main Circuit Diagram (2/5)[...]

3-3 Samsung Electronics SCHEMA TIC DIAGRAMS Repair Manual Main Circuit Diagram (3/5)[...]

3-4 SCHEMA TIC DIAGRAMS Samsung Electronics Repair Manual Main Circuit Diagram (4/5)[...]

3-5 Samsung Electronics SCHEMA TIC DIAGRAMS Repair Manual Main Circuit Diagram (5/5)[...]

3-6 SCHEMA TIC DIAGRAMS Samsung Electronics Repair Manual 3.2 PC L Main Circuit Diagram (1/9)[...]

3-7 Samsung Electronics SCHEMA TIC DIAGRAMS Repair Manual PC L Main Circuit Diagram (2/9)[...]

3-8 SCHEMA TIC DIAGRAMS Samsung Electronics Repair Manual PC L M a i n Circuit Diagram (3/9)[...]

3-9 Samsung Electronics SCHEMA TIC DIAGRAMS Repair Manual PC L Main Circuit Diagram (4/9)[...]

3-10 SCHEMA TIC DIAGRAMS Samsung Electronics Repair Manual PC L M ainCircuit Diagram (5/9)[...]

3-11 Samsung Electronics SCHEMA TIC DIAGRAMS Repair Manual PC L Main Circuit Diagram (6/9)[...]

3-12 SCHEMA TIC DIAGRAMS Samsung Electronics Repair Manual PC L M a i n Circuit Diagram (7/9)[...]

3-13 Samsung Electronics SCHEMA TIC DIAGRAMS Repair Manual PC L M a i n Circuit Diagram (8/9)[...]

3-14 SCHEMA TIC DIAGRAMS Samsung Electronics Repair Manual PC L M a i n Circuit Diagram (9/9)[...]

3-15 Samsung Electronics SCHEMA TIC DIAGRAMS Repair Manual 5V 18V 24VS 24VS 18V 24VS 5V SAMSUNG ELECTRONICS TITLE REF . NO DA TE 01/01/04 1.0 1 OF 2 DESIGNED CHECKED REV . APPRO VED DRW . NO SIZE A4 SW ALLOW -HVPS CN1-#6 U2-B CN1-#7 U2-A JH.CHO IN GND OUT U3 KA7818 7407 7407 JC R422 5.6K R411 2.2K R401 100 Q401 A708-Y R412 2K R403 110KF VR401 50K R[...]

3-16 SCHEMA TIC DIAGRAMS Samsung Electronics Repair Manual 5V 18V 24VS 18V 18V 18V 24VS 24VS D-GND CN1-#5 CN1-#4 CN1-#8 TITLE DRW . NO REF . NO SIZE A4 DA TE 01/01/04 SW ALLOW -HVPS REV . 1.0 2 OF 2 DESIGNED CHECKED APPROVED SAMSUNG ELECTRONICS CN1-#3 7407 JH.CHO U2-F U2-E 7407 7407 JC R205 1K R206 100 Q203 A708-Y R207 2K R208 30KF R209 110KF VR201[...]

3-17 Samsung Electronics SCHEMA TIC DIAGRAMS Repair Manual +24V 1.8A +5V 1.0A GND NO MARKING RESISTOR 1/4W -J (5%) 1 3 5 6 11 10 7 12 GND CN5-14 CN5-13,15 CN5-16 EER2828 +5V +24VS GND GND 1 2 17 4 9 6 3 18 15 5 16 12 7 14 8 13 1A 1B 2A 2B PHASE1 +ENABLE1 RC1 SENSE1 E1 VREF GND E2 SENSE2 RC2 VCC VBB U1 A2918SWH 11 5 PHASE2 +ENABLE2 CN2 35303-0450 +5[...]

3-18 SCHEMA TIC DIAGRAMS Samsung Electronics Repair Manual +24V 1.8A +5V 1.0A GND NO MARKING RESISTOR 1/4W -J (5%) 1 3 5 6 11 10 7 12 GND CN5-14 CN5-13,15 CN5-16 EER2828 +5V +24VS GND GND 1 2 17 4 9 6 3 18 15 5 16 12 7 14 8 13 1A 1B 2A 2B PHASE1 +ENABLE1 RC1 SENSE1 E1 VREF GND E2 SENSE2 RC2 VCC VBB U1 A2918SWH 11 5 PHASE2 +ENABLE2 CN2 35303-0450 +5[...]

3-19 Samsung Electronics SCHEMA TIC DIAGRAMS Repair Manual 3.5 Panel Circuit Diagram[...]

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Samsung Electronics Digital Printing CS Group Copyright (c) 2001. 10 This manual is made and described centering around circuit diagram and circuit description needed in the repair center in the form of appendix.[...]

Contents Samsung Electronics CONTENTS 1. Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page(1-1) 1-1 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page(1-1) 1-2 Precautions on Disassembly and Reassembly . . . . . . . . . . . . . . .page(1-1) 1-3 T ools f[...]