LASER PRINTER ML-1200 Series ML-1210 / ML-1250 / ML-1220M SERVICE LASER PRINTER Manual CONTENTS 1. Precautions 2. Specifications 3. Disassembly and Reassembly 4. Troubleshooting 5. Exploded Views and Parts List 6. Block Diagram 7.
This service manual is also provided on the web, the ITSELF system Samsung Electronics Co., Ltd. http://itself.sec.samsung.co.kr © Samsung Electronics Co.,Ltd. October. 2001 Printed in Korea. VERSION NO. : 2.
This manual is stated and provided for service description. All rights reserved. Any parts of the information in this manual are prohibited from free duplication, use or translation without prior written approval except in cases allowed by the Copyright Act. Specifications are subject to change without prior notice. Samsung Electronics Digital Printing CS Group Copyright (c) 2001. 5.
Precautions 1. Precautions Please read the following carefully to prevent any accidents and not to damage the unit during service. 1-1 Safety Precautions 1. Safety Precautions There are some electric or machinery parts with safety related property. If the parts replaced are different from the original, the safety may not function. Even if the part could allow higher voltage than that of the part used, do not replace it and use a regular product clarified in specifications. 2.
Precautions 1-3 Tools for Troubleshooting The following tools are recommended for safe and smooth troubleshooting described in this service manual. 1 DCU(Diagnostic Control Unit) Standard: Test equipment to diagnose the Laser printer supplied by Samsung Electronics. 4 Driver Standard: "-" type, "+" type (M3 long, M3 short, M2 long, M2 short). 5 Pinset Standard: For general home use, small type. 2 DVM(Digital Volt Meter) Standard: Indicates more than 3 digits.
Specifications 2. Specifications ML-1210 (ML-1220M) Engine Speed Resolution 12ppm 600 x 600 dpi 1200 x 600 dpi FROP(Fist Power On Time) Under 12.5 sec Warm-Up Time Power Consumption Dimension Weight Controller ML-1250 30 sec 25W (Print), 10W (Sleep) 329 x 355 x 231 mm (13” x 14” x 9.1”) Max 6.
Disassembly and Reassembly 3. Disassembly and Reassembly 3-1 Cover Assembly 3-1-1 Front Cover 1. Pull the both side of the cover to open. 4. Remove a screw of the front cover PCB and remove the connector, then remove the cover. 2. Remove a screw and remove the stopper that holds the printer cover. 3-1-2 Other Covers 1. Before you remove other covers, you should remove the Front cover in advance. 2. Rear Cover : Remove the cover in the direction of a . 3.
Disassembly and Reassembly 3-2 LED Panel PBA 1. Before you remove other covers, you should remove. 3. Remove two screws, and remove LED panel. • Front Cover (see [3-1 Main Cover]) 2. Remove two screws of PCB cover, and widen the hooks( a b c ) to remove. 4. Remove PCB from the PCB cover. 3-3 LSU(Laser Scanning Unit) 1. Before you remove LSU, you should remove front cover, rear cover and top cover. 3. Remove two connectors from the LSU, then remove the LSU. • Main Cover (see [3-1 Main Cover]) 2.
Disassembly and Reassembly 3-4 Transfer 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 Assembly 2. Remove five screws securing the motor assembly and remove a connector from engine board(Engine board and SMPS board are integrated), then take the motor assembly out.
Disassembly and Reassembly 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. Note When you reassemble the HVPS board, make sure that five terminals should be put in place. Terminal 3-7 Fuser Assembly 1. Before remove fuser assembly, you should remove: • Main Cover (see [3-1 Main Cover]) 3. Remove two screws and unplug a fuser assembly harness.
Disassembly and Reassembly 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. 3. Take the halogen lamp out from the Heat Roller. Note When you reassemble the halogen lamp, handle it with care as it is fragile. 2. Remove two screws from the fuser assembly, and take the Heat Roller out.
Disassembly and Reassembly 3-9 SMPS Board 1. Before you remove the SMPS board, you should remove: • Main Cover (see [3-1 Main Cover]) 3. Unplug connectors from the main board and connectors from SMPS, then remove the SMPS. Remove four screws from SMPS and remove the SMPS board. 2. Remove screws in the order of a b then remove the shield engine assembly. a b 3-6 Note The Engine board and SMPS board are integrated in a body.
Disassembly and Reassembly 3-10 Main Board and Sensor Board 1. Before you remove the main board, you should remove: 3. Release four snap-fits securing the insulator engine board and then remove the insulator. • 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. Main B’d 4. Release four snap-fits securing the sensor board and then remove the sensor board.
Troubleshooting 4. Troubleshooting 4-1 How to use DCU 4-4 The cause and solution of the malfunction 4-1-1 DCU Setup ......................................Page(4-2) 4-4-1 All LEDs blinking (Fuser Error)........Page(4-16) 4-1-2 Code ................................................Page(4-2) 4-4-2 All LEDs blinking (SCAN ERROR) .Page(4-16) 4-1-3 Self Diagnostic Mode......................Page(4-3) 4-1-4 Self Test Button ................................
Troubleshooting 4-1 How to use DCU 4-1-1 DCU Setup You can examine the malfunction of the printer. To 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 the panel and each code tells the function of the printer.
Troubleshooting 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. To enter the self-test mode, turn the power on pressing the buttons of [Down], [Shift] and [Stop] at the same time. Release the button within 2 or 3 seconds if 78 shows in the DCU.
Troubleshooting 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 Test Indicates the PTL LED. 15. Fan Test Indicates the function of the fan. 4-1-4 Self Test Button If the Self-Test button pressed, vertical lines are printed.
Troubleshooting 4-2 The cause and solution of Bad image 4-2-1 Vertical Black Line and Band • Description Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer 1. Straight thin black vertical line occurs in the printing. 2. Dark black vertical band occur in the printing. Check and Cause Solution 1. Damaged develop roller in the Developer or deformed Doctor-blade. 1. If causes 1 and 2 occur in the developer cartridge, replace the developer and try to print out. 2.
Troubleshooting 4-2-3 Horizontal Black Band • Description Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer 1. Dark or blurry horizontal stripes occur in the printing periodically. (They may not occur periodically.) Check and Cause Solution 1. Bad contacts of the voltage terminals to developer. 1. Clean each voltage terminal of the Charge, Supply, Develop and Transfer roller. (remove the toner particles and paper particles) 2. The rollers of developer may be stained.
Troubleshooting 4-2-5 Light Image • Description Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer The printed image is light, with no ghost. Check and Cause Solution 1. Develop roller is stained when the toner of developer cartridge is almost consumed. 1. Check if the Toner Save mode is off. 2. Ambient temperature is below than 10°C. 2. Replace the developer cartridge and try to print out. 3. Wait 30 minutes after printer is powered on before you start printing. 3.
Troubleshooting 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 transfer roller bushing or holder is damaged. 1. Replace both the left and right Spring Holder. 2. The toner level is not even on the developer roller due to the bad blade. 2.
Troubleshooting 4-2-9 Ghost (1) • Description 75mm Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Ghost occurs at 75 mm intervals of the OPC drum in the whole printing. Check and Cause Solution 1. Bad contacts caused by contamination from toner particles between high voltage terminal in the main body and the electrode of the Developer. 1. Clean the terminals when contaminated by toner particles. 2.
Troubleshooting 4-2-11 Ghost (3) • Description Check and Cause Digital Digital Printer Printer Solution 1. The life of the developer may be expired. 1. Occur in the developer cartridge, replace the developer and try to print out. 2. The abnormal voltage and bad contact of the terminal of the supply roller roller. 2. Check the approved voltage of the supply roller and contact of the terminal and adjust if necessary.
Troubleshooting 4-2-14 Satins on Back of Page • Description Digital Digital Pri Digital Printer Digital Printer Digital Printer The back of the page is stained at 47mm intervals. Check and Cause Solution 1. Transfer roller is contaminated. 1. Perform the OPC Cleaning Mode Print 2 or 3 times. Run Self-Test to remove the contamination of the transfer roller. 2. Pressure roller is contaminated. 2. Replace the transfer roller if contaminated severely. 3.
Troubleshooting 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 0 1. Paper is not exited from the cassette. 2. Jam-0 occurs if the paper feeds into the printer. • Description Check and Cause Solution 1.
Troubleshooting 4-3-3 JAM 1 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. • Description Check and Cause LSU EXIT 2 Solution 1. If the recording paper is jammed in front of or inside the fuser. (Perform DCU diagnostic code of) 1. Replace the SMPS. (Service Parts : Figure 10, chapter 5) 2.
Troubleshooting 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. 1. Replace the solenoid if necessary. (Service Parts : Figure 13, chapter 5) 2. Pad-Friction is contaminated with foreign matter.(oil...) 2. Clean the pad friction with soft clothe dampened with IPA(Isopropyl Alcohol). 3. The face of paper is blended. 3. Use the smooth paper.
Troubleshooting 4-3-7 OPC • Description Paper is rolled up in the OPC. Check and Cause Solution 1. Paper is too much thin. 1. Recommend to use normal paper. 2. The face of paper is curled. 2. How to remove the rolled paper in the OPC. • Remove the paper while turning the OPC against the ongoing direction. • Clean fingerprints on the OPC softly with soft cloth dampened with IPA(Isopropyl Alcohol) or tissue.
Troubleshooting 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 Solution 1. Check if the thermostat, AC wire and Heat Lamp is open. 1. If the thermostat is open replace the fuser and check following items. 2. Check if the thermistor sensor is in place.
Troubleshooting 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 DCU Mode : Check if the Error States '60' '62' '68' occur. Check the operation of Fuser Erasing Lamp On/Off with the Error Code Check -10-. Solution 1. Replace the Fuser. (Service Parts : Figure 8-4, Chapter 5) 2. Replace the Main Control board.
Troubleshooting 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. 1. Replace the hook lever, if defective. (Service Parts : Figure 1, chapter 5) 2. Check the connector and circuit of the cover switch department in the Main Control board. Perform DCU mode : If Error state '64' occurs, Check the related codes of the Cover Open Error. 2.
Troubleshooting 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. 1. Check the motor harness, replace it, if defective. (Service Parts : Figure 12, chapter 5) 2. Perform DCU diagnostic code 00 and Check the motor operation. 2. Replace the SMPS, if necessary.
Troubleshooting 4-4-11 Vertical Line Getting Curved • Description When printing, vertical line gets curved. Check and Cause 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. Solution 1. Replace LSU. (Service Parts : Figure 13, chapter 5) 2. Replace the Main Control board.
Troubleshooting 4-5 Toner 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 Toner Cartridge Excessive exposure to direct light more than a few minutes may cause damage to the cartridge.
Troubleshooting 4-5-4 Signs and Measures at Poor toner cartridge Fault Light image and partially blank image (The life is ended.) Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Signs Cause & Check • The printed image is light or unclean and untidy. 1. If the image is light or unclean and untidy printed image Shake the developer and then recheck. • Some part of the (1)NG: Check the weight of the image is not printdeveloper ed.
Troubleshooting Fault White Black spot Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Signs Cause & Check 1. If light or dark periodical black dots occur, this is because the developer rollers are contaminated with foreign substance or paper particles. • White spots occur in the image period- (1)35mm interval : Charged roller ically. (2)75mm interval : OPC cycle • Light or dark black dots on the image occur periodically. 2.
Troubleshooting Fault Ghost & Image Contamination Signs Cause & Check Solution • The printed image is too light or dark, or partially contaminated black. 1. The printed image is too light or dark, or partially contaminated black. (1)Check whether foreign substance or toner are stuck to the terminal(point of contact) of the developer. (2)Check whether the terminal assembly is normal. 1. All of 1, 2, 3 above (1)Remove toner and foreign substances adhered to the contact point of the developer.
Troubleshooting 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-Test Mode: Turn the power on while pressing the test printing button for 2 or 3 seconds before printing works. 1.Check the power of the printer and perform the SelfTest. If the test printing works, that means no problems in the printer itself.
Troubleshooting 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. 1. Not working with the message 'insufficient printer memory' means hard disk space problem rather than the RAM problem. In this case, provide more space for the hard disk.
Troubleshooting 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 defective or wrong setup in the CMOS Setup. Check and Cause Solution 1. Set up the parallel port in the CMOS SETUP. 1. Select SPP(Normal) or ECP LPT Port the among ECP, EPP or SPP in the CMOS Setup. 2. Printer Driver Error. 2.
Troubleshooting 4-6-4 SPOOL Error • Description To 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 convenient time (for example, when a printer is finished printing its current document). Check and Cause Solution 1. Insufficient space of the hard disk in the directory assigned for the basic spool. 1.
Exploded Views and Parts List 5. Exploded Views and Parts List • 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. Way to observe Part Code & Description Part code and Description is quoted and controlled by determined standard. Refer to this determined standard, it will help with ordering Part.
Exploded Views and Parts List 5-1 Exploded Views and Parts List • Service Parts List No.
/1250 10 3 20M 12 ML - ML -12 Exploded Views and Parts List 7 13 5 2 8 4 8-18 1 9 8-26 11 8-20 8-22 8-23 8-30 8-2 1-5 1-2 8-21 8-24 8-12 10 8-13 1-6 1-3 8-5 8-14 8-9 8-6 8-15 1-1 8-7 8-19 8-1 1-4 8-11 8-4 1-2 8-8 8-25 8-4-2 1-2’ 8-3 8-17 8-27 8-16 8-29 8-4-1 8-28 8-10 6 1-7 ML-1210 / ML-1250 Samsung Electronics 12-1 12 ML-1220M 5-3
Exploded Views and Parts List 5-2 Front Assembly 0 11 SA MS UN G 3 2 5 ML-1210 / ML-1250 10 0’ 4 SA MS UN G 10 8 ML-1220M NO 0 6 1 12 9 DESCRIPTION ELA HOU-COVER FRONT 7 ELA HOU-COVER FRONT 1 CBF-HARNESS-PANEL MAIN 2 PMO-COVER FRONT 3 PMO-GUIDE STACKER 4 PMO-DOOR FACE UP 5 PPR-SHEET PAPER GUIDE 6 PMO-KEY A 7 PMO-KEY B 8 PMO-LENS SED 9 PMO-COVER PCB 10 PMO-STOPPER 11 PMO-BRKT PUSH DEVE 12 PBA SUB DISP-PANEL 13 PMO-COVER FRONT, SUB IMAC 2 2’ SA MS UN G 1
Exploded Views and Parts List 5-3 Engine/Frame Lower Assembly 2-17 2-14 2-13 2-3 3-2 3-2-2 3-2-3 3-2-1 3-2-4 1 2-3-2 2-12 2-11 2-15 2-7 3-12 3-3 3-3-1 3-2-3 3-2-1 3-4 3-6 3-5 3-6 2-16 3 2-16-2 2-16-1 2-7-3 2-7-1 2-7-2 2-9 2-9-1 2-9-2 3-10-2 2-9-3 3-45 3-25 2-9-4 2-8 3-9 3-16 3-24 3-22 3-23 3-21 2-10 3-17 3-10-1 3-10 3-41 2-3-1 3-15 3-43 3-44 3-1 2-1 2-2 2-2-1 2-2-3 2-2-2 2-6 2-5 3-8 3-7 3-26 3-11 3-22 3-23 3-21 3-28 3-19 3-13 3-14 3-32 3-38 3-27 3-39 3-30 3-29 3-18 3-26
Exploded Views and Parts List 5-4 Fuser Assembly 24 30 29 27 26 28 24 23 25 17 21 0 NO ELA HOU-FUSER ASS’Y 1 THERMISTOR-NTC 2 THERMOSTAT-150C 3 LAMP-HALOGEN 4 PMO-COVER FUSER 5 PMO-BUSHING H/R, L 6 PMO-BUSHING H/R, R 7 PMO-COVER_THERMOSTAT 8 NPR-ROLLER HEAT 9 IPR-ELECTRODE_PLATE 10 IPR-GROUND_FU 11 PMO-GUIDE CLAW 12 ELECTRODE-WIRE,1 13 ELECTRODE-WIRE,S 14 MEA ETC-SHAFT EXIT 14-1 PMO-SHAFT_EXIT(Z15) 14-2 RMO-RUBBER_EXIT 15 15-1 5-6 DESCRIPTION 0 7 S-1 13 2 9 12 20
Exploded Views and Parts List 5-5 Shield Engine Unit Assembly NO DESCRIPTION 0 ELA HOU-SHIELD ENGINE 1 MEC-SHIELD BRKT CONTROLLER 1-1 IPR-SHIELD ENGINE 1-2 IPR-BRKT CONTROLLER 2 PCT-INSULATOR SMPS 3 CBF HARNESS-INLET ASS’Y S-1 SCREW-MACHINE S-2 SCREW-TAPTITE S-3 SCREW-TAPTITE 0 2 S-1 S-2 3 S-3 1 1-1 1-2 Samsung Electronics 5-7
Exploded Views and Parts List 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 0 7 5 4 6 1 2 3 S-7 S-7 5-7 Plate-Upper Unit Assembly NO DESCRIPTION 0 MEC-PLATE UPPER 1 IPR-UPPER-PLATE 2 IPR-PLATE SPRING DEV 3 MEA ETC-ROLLER PICKUP 3-1 PMO-HOUSING_PICKUP 3-2 RMO-ROLLER_PICKUP 3-3 4 0 PMO-IDLE_PICKUP MEA ETC-IDLE FEED 4-1 PMO-
Block Diagram 6. Block Diagram 6-1. Block Diagram(GDI) MAIN USB PC IEEE 1284 CABLE +5V 74LVX161284 Line Transcei ver Power On VOLTAGE Res et DETECT OR FLASH MEMORY (0 .
Block Diagram 6-2. Block Diagram(PCL) MAIN Oscillator 48 MHz +5V USB PC IEEE 1284 CABLE USB Driver USBN9602-28M FLASH MEMORY (2MB) VOLTAGE DETECTOR PANEL B' D Oscillator 44 MHz Main Clock +24V IN-LET EXIT SENSOR POWER CORD MOTOR ( 4 MB) Engine SOLENOID Option Up to 68MB FAN DEV_FUSE 74HCT273 S3C46C0X01 74ACT273 LSU Devided by 74HC406ON Video Clock Crystal 6.
Connection Diagram 7. Connection Diagram 7-1.
Connection Diagram 7-2.
Repair Manual LASER PRINTER ML-1200 Series CONTENTS 1. Block Diagram 2. Connection Diagram 3.
Samsung Electronics 3 KEY 4 L ED P ANE L B' D PC IEEE 12 84 CABLE USB Osci l l ator 44 MHz VOL TAGE DETECT OR 74LVX161284 Li ne Transcei ver Vi deo Clock Po we r On Re s e t S3C46M0X C P U Jupiter3 MAIN THVPWM BI ASPW M BUFFER FS781BZB MHVP WM Mai n Clock Crystal 10MHz ( 8MB) SDRAM ( 0 .
1-2 3 KEY 4 L ED P ANE L B' D PC IEEE 12 84 CABLE USB Oscillator 44 MHz Oscillator 20 MHz VOLTAGE DETECTOR Video Clock Main Clock Power On Reset USB Driver USBN9602-28M Oscillator 48 MHz S3C46C0X01 CPU MAIN B' D BI ASPW M THVPWM HV PS LSU EXIT SENSOR +24V MHVP WM Crystal 6.
2 CONNECTION DIAGRAM 2. Connection Diagram 2.
CONNECTION DIAGRAM 2-2 PCL Connection Diagram(ML-1250) IEEE1284 COMPATI ABLE CABLE HOST COMPUTER USB CABLE 36 PI N CONNECTOR f or USB 1 2 3 4 SENSOR BOARD 1 2 3 4 +5V PEMPTY * FEED_SENSOR* +5V GND 1 2 3 4 COVER SW ITCH 1 2 3 +24V Not Use d +24VS 1 2 3 1 2 3 4 1 2 3 4 5 1 2 3 4 5 6 CN5 1 2 3 4 5 6 7 8 9 +5V +5V GND LED_ERROR LED_PAPER LED_DATA LED_TONER KEY_TONER* KEY_CANCEL* KEY_DEMO* 1 2 3 4 5 6 7 8 9 CN4 1 2 +5V PTL 1 2 CN12 CN7 CN9 PCL 1 THERMI STOR 2 HV PS 1 2 3 4 5 6 7
3 SCHEMATIC DIAGRAMS 3. Schematic Diagrams 3.
SCHEMATIC DIAGRAMS Main Circuit Diagram (2/5) 3-2 Repair Manual Samsung Electronics
SCHEMATIC DIAGRAMS Main Circuit Diagram (3/5) Repair Manual Samsung Electronics 3-3
SCHEMATIC DIAGRAMS Main Circuit Diagram (4/5) 3-4 Repair Manual Samsung Electronics
SCHEMATIC DIAGRAMS Main Circuit Diagram (5/5) Repair Manual Samsung Electronics 3-5
SCHEMATIC DIAGRAMS 3.
SCHEMATIC DIAGRAMS PCL Main Circuit Diagram (2/9) Repair Manual Samsung Electronics 3-7
SCHEMATIC DIAGRAMS PCL Main Circuit Diagram (3/9) 3-8 Repair Manual Samsung Electronics
SCHEMATIC DIAGRAMS PCL Main Circuit Diagram (4/9) Repair Manual Samsung Electronics 3-9
SCHEMATIC DIAGRAMS PCL MainCircuit Diagram (5/9) 3-10 Repair Manual Samsung Electronics
SCHEMATIC DIAGRAMS PCL Main Circuit Diagram (6/9) Repair Manual Samsung Electronics 3-11
SCHEMATIC DIAGRAMS PCL Main Circuit Diagram (7/9) 3-12 Repair Manual Samsung Electronics
SCHEMATIC DIAGRAMS PCL Ma in Circuit Diagram (8/9) Repair Manual Samsung Electronics 3-13
SCHEMATIC DIAGRAMS PCL Main Circuit Diagram (9/9) 3-14 Repair Manual Samsung Electronics
SCHEMATIC DIAGRAMS 3.3 HVPS Circuit Diagram (1/2) 5V 18V C402 103 R401 100 R403 110KF Q401 A708-Y MHV-PWM 3 CN1-#6 T401 KAB-006 R405 220KF R411 2.2K R422 5.6K 24VS R407 240K R404 33K 12 + 13 4 Q402 D526-Y 14 R426 MGR1/2W 100KF MHV R413 MGR1/2W 6MF 6 C405 2KV 680 R408 47K U1-D KA324 D401 4KV C404 3KV 471 7 5 2 - D111 1N4148 R402 56KF U2-B 7407 1 C406 3KV 471 D402 4KV R414 MGR1/2W 6MF 4 R412 2K C408 104 C401 222 R409 430 R406 2.
SCHEMATIC DIAGRAMS HVPS Circuit Diagram (2/2) T201 HVT-2A 24VS 5V 18V 1 C208 6KV 471 C206 6KV 471 7 D204 6KV R201 10K THV-PWM R206 100 13 CN1-#3 12 11 10 U2-F 7407 R205 1K U2-E 7407 24VS + Q204 D526-Y D201 1N4148 R208 30KF Q203 A708-Y 5 C201 103 R209 110KF R207 2K U1-B KA324 C101 35V 47uF VR201 50K C202 331 6 R210 510KF R213 2.2K 7 C209 6KV 471 C207 6KV 471 THV R212 470K C203 D203 472 1N4148 ZD201 5.6V R215 430 R216 BR1/2W 30MJ R218 MGR1/2W 100KF C204 473 ZD202 7.
SCHEMATIC DIAGRAMS 3.4 SMPS Circuit Diagram (110V) R502 F501 1/2W 560K 125V 8A F502 LF501 125V 3A APOLLO12 LF502 APOLLO12 V501 SCK-054 T501 R518 C522 EER2828 22 1KV 102 CN501 R509 1W 82 3W 47K 104 C520 300uH C504 U502 104 R513 +24VS FB GND R512 330 6 10 NB N5 2.2K-F 50V 33uF PC501 R511 C513 1uF C515 7 1000uF R504 C518 K1010H 4.3K 10V 5 CN5-1,3,5 R515 U503 68K KA431 1 R521 R520 150 47K +5V 1.0A C517 104 EXIT CN5-14 R516 OP501 2.
SCHEMATIC DIAGRAMS SMPS Circuit Diagram (220V) R502 F501 1/2W 560K 250V 5A F502 LF501 250V 2A APOLLO12 V501 LF502 T501 SCK-054 APOLLO12 R518 C522 22 1KV 102 EER2828 CN501 R509 1W 82 3W 47K CN5-7,9,11 C520 1W 100K 300uH C504 333 U502 1/4W 22 R513 FB 330 4 50V 33uF 5 R504 7 PC501 K1010H 4.3K N5 CN5-1,3,5 R515 2.2K-F R511 10 NB C518 C513 1uF C515 10V 1000uF 22K U503 KA431 1 R521 R520 150 47K +5V 1.0A C517 104 EXIT CN5-14 R516 OP501 2.
SCHEMATIC DIAGRAMS 3.
This manual is made and described centering around circuit diagram and circuit description needed in the repair center in the form of appendix. Samsung Electronics Digital Printing CS Group Copyright (c) 2001.
Contents 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 Tools for Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page(1-2) 2. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
