Page 4 - -1 Safety Precautions; Releasing Plastic Latches
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 withsafety ...
Page 5 - -3 Tools for Troubleshooting; Electronic Scale; Note
Precautions 1-2 Samsung Electronics 1-3 Tools for Troubleshooting The following tools are recommended for safe and smooth troubleshooting described in this service manual. DCU(Diagnostic Control Unit) Standard: Test equipment to diagnose the Laserprinter supplied by Samsung Electronics. DVM(Digital ...
Page 6 - Engine
Specifications 2-1 Samsung Electronics 2. Specifications Speed Resolution FROP(Fist Power On Time) Warm-Up Time Power Consumption Dimension Weight Processor Memory Emulation Interface OS Support N/W Input Output Manual Media Type Type Life Cartridge Pick up Roller Feed Roller Transfer Roller Fuser K...
Page 7 - Disassembly and Reassembly
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 lowerpart. 4. Remove a screw of the front cover PCB and r...
Page 8 - Remove two screws of PCB cover, and widen the
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 ...
Page 9 - end of the roller slightly, then take it out.
Disassembly and Reassembly 3-3 Samsung Electronics 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...
Page 10 - Remove four screws and a connector from HVPS; Terminal
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 remo...
Page 11 - -8 Thermostat and Halogen Lamp; Remove a screw from the fuser assembly and
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 twoscrews securing the thermostat. 2. Remove two screws from the fuser assembly, and take the Heat Roller out. 3. Take the halogen...
Page 12 - Before you remove the SMPS board, you should; a b
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, ...
Page 13 - -10 Main Board and Sensor Board; Main B’d
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 b...
Page 14 - -4-3 Not function of the gear of the fuser due to
Troubleshooting 4-1 Samsung Electronics 4. Troubleshooting 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 Test Button ...........
Page 15 - Normal Code
Troubleshooting 4-2 Samsung Electronics 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 connectthe harness wire(10 pin/4 pin) to the CN10(4 pin) of the Main control board. 4-1-2 Code Connect DCU to the pr...
Page 17 - ALL HV; Indicates the PTL LED.; Fan Test; Indicates the function of the fan.
Troubleshooting 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, electronicresistance of transfer roller and high voltage is detected. If no toner cartridge in the printer, output of THV is+199V ~ + 2100...
Page 18 - -2 The cause and solution of Bad image
Troubleshooting 4-5 Samsung Electronics 4-2 The cause and solution of Bad image 4-2-1 Vertical 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 PrinterDigital PrinterDigital PrinterDigital Printer...
Page 23 - Digital Printer
Troubleshooting 4-10 Samsung Electronics 4-2-11 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 ...
Page 25 - -3 The cause and solution of the bad discharge
Troubleshooting 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 sensoractuator. Replace the defective actuator (Service...
Page 28 - • Description; Paper is rolled up in the OPC.; Check and Cause; How to remove the rolled paper in the OPC.
Troubleshooting 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...
Page 29 - -4 The cause and solution of the malfunction
Troubleshooting 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 t...
Page 30 - -4-3 Not function of the gear of the fuser due to melting away
Troubleshooting 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 Erasin...
Page 32 - Motor harness or sub PCB may be defective.
Troubleshooting 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 Ch...
Page 33 - When printing, vertical line gets curved.; If the supply of +24v is unstable in the Main Control board
Troubleshooting 4-20 Samsung Electronics 4-4-11 Vertical 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. Repla...
Page 34 - -5 Toner Cartridge Service; -5-2 Service for the Life of Toner Cartridge
Troubleshooting 4-21 Samsung Electronics 4-5 Toner Cartridge Service It is not guaranteed for the default caused by using other toner cartridge other than the cartridge supplied by theSamsung Electronic or caused by non-licensed refill production. 4-5-1 Precautions on Safe-keeping of Toner Cartridge...
Page 35 - -5-4 Signs and Measures at Poor toner cartridge; Fault
Troubleshooting 4-22 Samsung Electronics 4-5-4 Signs and Measures at Poor toner cartridge Fault Signs Cause & Check Solution Light image andpartially blankimage(The life is ended.) TonerContamination • The printed image is light or uncleanand untidy. • Some part of the image is not print-ed. • P...
Page 38 - -6 The cause and solutions of bad environment of the software
Troubleshooting 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-Test Mode: Turn the power on while p...
Page 40 - Set up the parallel port in the CMOS SETUP.
Troubleshooting 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 ...
Page 42 - drawings and service items.; Exploded Views and Parts List; Way to observe Part Code & Description
• 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...
Page 43 - -1 Exploded Views and Parts List; Description; • Service Parts List
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 PANEL JC92-01280A 1 O 1-2 PMO-COVER FRONT refer to the table ⇒ 1 O 1-3 CBF HARNES...
Page 48 - -5 Shield Engine Unit Assembly
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-INSULATOR SMPS 3 CBF HARNESS-INLET ASS’Y S-1 SCREW-MACHINE S-2 SCR...
Page 49 - -6 RX Drive Assembly
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-...
Page 50 - MAIN; Eng i ne; P ANE L; FLASH; C P U; L i ne; PC
Block Diagram 6-1 Samsung Electronics 6. Block Diagram 6-1. Block Diagram(GDI) MAIN S3C46M0X SDRAM ( 8MB) SMP S Eng i ne P ANE L B' D FLASH MEMORY ( 0 .5MB) POWER CORD +24V MOTOR FAN EXI T SENSOR HV PS B' D MHV OPC GND SUPPL Y DEV TH V BUF F ER MHVP W M BI ASPW M THVPWM POWER SWI TCH I N- L ET L ED ...
Page 51 - SMPS
Block Diagram 6-2 Samsung Electronics 6-2. Block Diagram(PCL) MAIN S Option Up to 68MB DRAM ( 4 (2MB) MB) LSU Eng i ne P ANE L B' D FLASH MEMORY POWER CORD +24V MOTOR SOLENOI D FAN EXIT SENSOR HV PS B' D MHV OPC GND SUPPL Y DEV TH V MHVP WM BI ASPW M THVPWM POWERSWITCH L ED 4 3 KEY IEEE 12 84 CABLE ...
Page 52 - Connection Diagram; PTL LED ARRAY; HV P S; HOST; ENGINE; GDI; Main
Connection Diagram 7-1 Samsung Electronics 7. Connection Diagram 7-1. Connection Diagram(GDI) 1 23 4 56 7 89 10 11 1 2 34 51 23 4 56 +24V_T+24V GND*PMOTOR+3. 3V E XT_C LK * HSYNC+5V+5V GND* LD_ONVDO+5V GND LSU POLYGONMOTO R LD DIODE +5V+5V GNDLED_ERRORLED_PAPER LED_DATALED_TONER* KEY_TONER* KEY_CANC...
Page 53 - PCL
Connection Diagram 7-2 Samsung Electronics 7-2. Connection Diagram(PCL) 1 23 4 56 7 89 10 11 +24V_SLEEP+24V GND * PLREADY* MOTOR E XT_C LK * HSYNC +5V +5V GND * LD_ON VDO +5V GND LSU POLYGONMOTO R LD DIODE +5V+5V GND KEY_TONER*KEY_CANCEL*KEY_DEMO* 1 2 34 5 67 8 9 LEDDISPLAYPANEL 1 2 34 5 67 8 9 +5V ...
Page 54 - Connection Diagram; CONTENTS; LASER PRINTER
Repair Manual Repair Manual 1. Block Diagram 2. Connection Diagram 3. Schematic Diagrams CONTENTS LASER PRINTER ML-1200 Series
Page 55 - MA; CP
1 1-1 Samsung Electronics BLOCK DIAGRAM Repair Manual 1. Block Diagram 1.1 GDI Block Diagram(ML-1210/ML-1220M) MA IN S 3 C 46M 0X SD R A M (8 M B ) SM P S En g in e PA N E L B' D FL AS H ME M O RY (0 .5 M B ) PO W E R CO R D +2 4 V MO TO R FA N EX I T SE N SO R HV P S B' D MHV OPC G N D SU P P L Y D...
Page 56 - LS; in; Devided by
1-2 BLOCK DIAGRAM Samsung Electronics Repair Manual MA IN S Option Up to 68MB DR A M (4 (2MB) MB ) LS U En g in e PA N E L B' D FL AS H ME M O RY PO W E R CO R D +2 4V MO TO R SO LE N O ID FA N EX IT SE N SO R HV P S B' D MHV OPC G N D SU PP L Y DE V TH V MH V P W M BI ASP W M TH VP W M POWER SWITCH...
Page 59 - Schematic Diagrams
3 3-1 Samsung Electronics SCHEMATIC DIAGRAMS Repair Manual 3. Schematic Diagrams 3.1 GDI Main Circuit Diagram (1/5)
Page 77 - Panel Circuit Diagram
3-19 Samsung Electronics SCHEMATIC DIAGRAMS Repair Manual 3.5 Panel Circuit Diagram
