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Samsung ML-7000N, Service Manual, Page: 34 / 58

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Samsung ML-7000N Service Manual Download Page 34

There are two wires for LSU. One is LSU motor and the other is Laser beam control. The wires
are wire to wire types. You can easily disconnect the wires. After disconnection, unscrew and
remove LSU.

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Summary of Contents for ML-7000N

Page 1: ...inter Contents SERVICE Manual 1 Precautions 2 Reference Information 3 Product Information 4 Disassembly 5 Trouble Shooting 6 Exploded Views Parts List 7 Block Diagrams 8 PCB Diagrams 9 Port Thru Network Printer Card Download Service Manual And Resetter Printer at http printer1 blogspot com ...

Page 2: ...ransfer Roller 3 Contamination fo paper path 3 Remove the contamination on paper path 1 Check HVPS output voltage 1 Refer to HVPS output spec 2 OPC Drum contamination or Replace the engine board image cartridge life 2 Replace the image cartridge 3 Check the contamination of 3 Clean the lens with a soft Back Ground PTL lens dry cloth 4 Check the terminal contact for 4 Fix the terminal to contact we...

Page 3: ...e between GND OPC and GND Frame 130V approx 3 Check LSU operation 3 Replace the LSU Refer to DCU control 05 Refer to 4 8 4 Compare new video board 4 Replace the video board with present one 5 Toner empty 5 Replace the image cartridge 1 Check the charger voltage 1 Refer to HVPS output spec All Black Image 2 Check the terminal contact Replace the engine board 3 Compare new video board with 2 Replace...

Page 4: ...rinter 2 Open the rear cover and disassemble the cover shield 3 Connect the DCU on engine board and close the rear cover 4 Open the top cover 5 Remove image Cartridge 6 Push the Cover Open Switch 7 Select the Diagnostic mode and measure HVPS output Recommanded Test Equipment DVM High Voltage Probe Download Service Manual And Resetter Printer at http printer1 blogspot com ...

Page 5: ...rmistor wire of the fuser unit Internal Error 11 Normal 2 400k is defected replace it Fuser Error 3 Check SMPS 3 If the fuser unit is normal CN2 conection on SMPS replace SMPS Fuse F2 open Defect of component related to Fuser control 4 Check Engine Board 4 If not normal operation after replacing CN7 connection it replace the engine board Fuser control line Cn5 2 level Lamp on 0 2V Lamp off 24V Che...

Page 6: ...de 07 2 Replace Duplex sensor actuator Duplex Jam 2 2 Check the Duplex sensor 2 actuator 3 Replace Gear of shield pcb 3 Check the Gear of shield pcb Refer to 4 11 6 7 Check all the gear for correct installation 1 Check the LED Array 1 Replace LED Array PTL Error 2 Check the cable connection or wire defect Refer to 6 2 Pre Transfer Lamp 3 Check Joint board 2 Replace harness or reconnection 3 Replac...

Page 7: ... Check MP solenoid Refer to 4 11 1 Paper is not The resistance of MP solenoid 70 80 2 Replace PAD exitted from cassette 2 Check PAD of Pickup roller Refer to 4 9 6 4 3 Check Joint board 3 Replace Joint board 2 Paper is stopped Measure the CN503 2pin Refer to 4 4 before feed sensor 4 Check the Gear of multi Purpose 4 Replace Pickup Unit Gear Pickup Unit 5 Connect the cable correctly 5 Check cable c...

Page 8: ...heck the paper empty sensor 1 Replace the paper empty sensor on Refer to DCU mode 07 Engine board 2 Check the paper empty sensor actuator 2 Replace paper empty sensor actuator 2 Multi Purpose Feeder 1 Check the paper empty sensor for MP 1 Replace MP sensor assembly Paper Empty Refer to DCU mode 07 2 Replace MP paper empty sensor 2 Check the MP paper empty sensor actuator actuator If not improved r...

Page 9: ... 1 24VS2 24V 24V 2 FUSERON 24V L O CN5 3 5 7 AGND AGND AGND SMPS 4 5Vs 5V 5V 6 8 10 5V 5V 5V 9 11 12 DGND DGND DGND 13 14 15 16 24VS2 24V 24V 1 2 3 5V 5V 5V 4 MP_CLUTCH L 0 7V O 5 5Vs 5V 5V 6 Q_LAMP L 0 7V O 7 9 24VS2 24V 24V CN6 8 SCF_READY H L I JOINT BOARD 10 STS_SCF PULSE PULSE I INTERFACE 11 13 AGND AGND AGND 12 MP_PAPER H L I 14 TONER H L I 15 17 DGND DGND DGND 16 CMD_SCF PULSE PULSE O 18 OP...

Page 10: ...D AGND AGND 10 24VS2 24V 24V 1 EBUSY H L O 2 17 19 20 21 DGND DGND DNGD 22 23 24 3 EMSG H L O 4 EXIT_PAP H L O 5 CCLK H PULSE I CN10 6 PRINT H L I VIDEO 7 VDI H L I CONTROLLER 8 CPRDY INTERFACE 9 PSYNC H O 10 READY H L O 11 HSYNC H L O 12 NC NC NC 13 15 16 18 5V 5V 5V 25 27 28 14 CMSG H I Download Service Manual And Resetter Printer at http printer1 blogspot com ...

Page 11: ...F PULSE PULSE O 16 18 DGND DGND DGND 17 OPT_CLK PULSE PULSE O 1 5V 5V 5V 2 AGND AGND AGND CN502 3 24V 24V 24V SCF 4 STS_SCF PULSE PULSE O INTERFACE 5 CMD_SCF PULSE PULSE I 6 OPT_CLK PULSE PULSE I 7 SCF_READY H L O 8 DGND DGND DGND CN503 1 24V 24V 24V MP_CLUTCH 2 MP_CLUTCH 24V L O CN504 1 5V 5V 5V Q_LAMP 2 Q_LAMP 5V L O CN505 1 MP_SENSOR H L I MP_SENSOR 2 DGND DGND DGND 3 5V 5V 5V CN506 1 5V 5V 5V ...

Page 12: ...PULSE PULSE I 7 SCF_READY H L O 8 DGND DGND DGND 1 MOT_PA 24V PULSE CN2 2 MOT_PB 24V PULSE O MOTOR 3 MOT_PA 24V PULSE O 4 MOT_PB 24V PULSE O 1 5V 5V 5V CN3 2 DCU_IN OUT PULSE PULSE I O DCU 3 DCU_CLK CLOCK CLOCK O 4 DGND DGND DNGD CN4 1 24V 24V 24V PICK UP 2 CLUTCH 24V L O 1 CASET_1 H L I CN5 2 CASET_2 H L I CASSETTE 3 CASET_3 H L I 4 DGND DGND DNGD Download Service Manual And Resetter Printer at h...

Page 13: ...tion check first for a bad weld short circuit or loose wire on the solder area of the board 2 Input low level is standard for the TTL logic level below 0 8V Input high level is standard for the TTL logic level above 3 5V But for PowerPC 603e the input low level is less than 0 8V and the input high level is more than 2 0V 3 USE an oscilloscope or logic analyzer for inspecting the crystal oscillator...

Page 14: ...Power Error Download Service Manual And Resetter Printer at http printer1 blogspot com ...

Page 15: ...System Error Download Service Manual And Resetter Printer at http printer1 blogspot com ...

Page 16: ...Engine Error Self Test Error Download Service Manual And Resetter Printer at http printer1 blogspot com ...

Page 17: ...Parallel Interface Error Printing Error Download Service Manual And Resetter Printer at http printer1 blogspot com ...

Page 18: ...ation System source clock is a 50ß Check point U16 FS741 s pin No 6 Replace the FS741 The output clock of QP17000 is a 25ß The input clock of CPU U26 and U24 is a 25ß Replace the board The video data colck source is a 62 7639ß at OSc2 The input clock of U31 is a 62 76397ß 3 White copy The output clock of U31 is a 16ß The input clock of U2 s pin No 125 is a 16ß Replace the board Check the normal op...

Page 19: ...nt View 4 2 Rear View Control Panel Cover Open Cover Front Cover Tray Power Switch Paper Level Indicator Cover Rear Controller Cassette Power Inlet Download Service Manual And Resetter Printer at http printer1 blogspot com ...

Page 20: ...er to remove the Cover Right Please see the hook which locks the cabinet to the frame right hand should first grab the hook and pull it out for releasing the hook from the frame Screw Cover Rear Cover Right Screw Hook Download Service Manual And Resetter Printer at http printer1 blogspot com ...

Page 21: ...The left hand should slide the Cover Right to the backward Download Service Manual And Resetter Printer at http printer1 blogspot com ...

Page 22: ...the hook of the Cover Left Pull the Hook and release it from the frame Slide the Cover Left to the backward with pulling the hook out The Cover Left can be easily removed Hook Pull Hook Screw Download Service Manual And Resetter Printer at http printer1 blogspot com ...

Page 23: ...ver Main Open the Cover Open Remove two screws See the hooks Push the hooks up and pull them upward With holding Cover Main remove the panel wire Cover Open Cover Main Up Screw Cover Top Screw Download Service Manual And Resetter Printer at http printer1 blogspot com ...

Page 24: ... stripe by pushing the stripe There is a hook holding the stripe After detaching the stripe from the Cover Rear Release the Cover Rear from the hinge Cover Rear Stripe Hinge Download Service Manual And Resetter Printer at http printer1 blogspot com ...

Page 25: ...troller After removing Shield ICU you can see the assembled controller Unplug the panel cable and engine I F cable with care and remove the screws from the frame Shield ICU Screw Panel Cable Frame ICU RAM Simm Socket Controller Board Engins I F cable Flash SIMM or Postscript SiMM Socket Joint Board Download Service Manual And Resetter Printer at http printer1 blogspot com ...

Page 26: ...m the frame You can see the Frame ICU Screw Screw reserved for Serial Parallel I F reserved for Network ASIC QP1700 Connector for Network Power PC processor Video Controller Board ASIC Powerbridge ASIC Hype chip Download Service Manual And Resetter Printer at http printer1 blogspot com ...

Page 27: ...crews and unscrew and remove the Cover pcb After removing the Cover pcb unplug the Thermistor connetor from the Engine Board Screw Cover pcb for engine B d Thermistor connector Download Service Manual And Resetter Printer at http printer1 blogspot com ...

Page 28: ... the fuser out and it will be removed The AC connector for fuser is des igned to be directly connected to the AC socket which is positioned in the frame Screw Screw exit sensor actuator Fuser Ass y Screw Screw Download Service Manual And Resetter Printer at http printer1 blogspot com ...

Page 29: ...ove it by pulling the Guide Rear out like figure In order to remove Guide Rear opening the Guide Rear out like figure and pull out hinge of Guide Rear Guide Rear Download Service Manual And Resetter Printer at http printer1 blogspot com ...

Page 30: ... black screws and detach the ass y from the frame and unplug the motor connector from the motor You can see the Bracket Motor ass y Motor and several gears are ass embled in one gear bracket Bracket Motor Ass y Motor Bracket Motor Ass y Download Service Manual And Resetter Printer at http printer1 blogspot com ...

Page 31: ...n Switch Unit Remove the SMPS Refer to SMPS Bracket Duplex Ass y disassembly 4 12 Detach two Connectors form the SMPS Remove 2 screws and detach the unit from the frame Cover Open Switch unit Download Service Manual And Resetter Printer at http printer1 blogspot com ...

Page 32: ...replaced depending on feeding quality Remove the screw of Bracket Support and tension spring Lift Guide Front Duplex and remove the 3 mounting screws of Pickup Ass y Pickup Ass y Tension Spring Guide Front Duplex Screws Screw Download Service Manual And Resetter Printer at http printer1 blogspot com ...

Page 33: ...order for LSU disassembling disassemble the Cover Main you should take off the left and right cover There is wiring protection cover Cap Wire LSU for LSU wires Remove Cap wire LSU Cover Top Cap wire LSU Download Service Manual And Resetter Printer at http printer1 blogspot com ...

Page 34: ...s LSU motor and the other is Laser beam control The wires are wire to wire types You can easily disconnect the wires After disconnection unscrew and remove LSU Download Service Manual And Resetter Printer at http printer1 blogspot com ...

Page 35: ... and pull it to the arrow direction See the Links which hold the MP tray in the both side Hold the Links and pull it to the arrow direction Remove the Cover main Hook Download Service Manual And Resetter Printer at http printer1 blogspot com ...

Page 36: ...ching the Tray MP see the screws and remove them Remove the hook and release the Cover Front by releasing the hook Cover Front Hook Screw Download Service Manual And Resetter Printer at http printer1 blogspot com ...

Page 37: ...the MP ass y by unscrewing 4 screws Before detaching MP Ass y unplug the MP solenoid and MP sensor connector from the Joint Board MP Assy Screw Screw Screw Screw Download Service Manual And Resetter Printer at http printer1 blogspot com ...

Page 38: ...m the panel board And next step is to remove the panel board which is located in the Cover Top Control panel consists of LCD ass y and Key LED ass y Remove Key LED ass y and remove LCD ass y LCD Ass y Cover Open Cover Top Download Service Manual And Resetter Printer at http printer1 blogspot com ...

Page 39: ...om Cover Top and see the hinge for LCD ass y in the cabinet and release them You should spread the hinge of LCD ass y But be careful not to damage the hinge Cover Top Hinge LCD Ass y Hook Download Service Manual And Resetter Printer at http printer1 blogspot com ...

Page 40: ... printer Open the Cover Rear and remove the Cover PCB In order for disassembling PCU the printer should be turned upside down When turned over toner may contamin ate LSU window Open the Cover Top and you should insert one paper into the inner like above figure Screw Paper wire Download Service Manual And Resetter Printer at http printer1 blogspot com ...

Page 41: ...ross Bottom by unscrewing them 8 screws Next remove the CST Sensor and remove the screws in the PCU which are black colored screws Bar Cross Bottom CST Sensor Download Service Manual And Resetter Printer at http printer1 blogspot com ...

Page 42: ...tor which are LSU s and Video I F s Unplug them with care Be careful not to be hurt to your hands when you disconnect the wires because the connection is tight and you may pull the connectors strongly Download Service Manual And Resetter Printer at http printer1 blogspot com ...

Page 43: ...PCU and Frame PCU Assy has some sensor some actuator solenoid and Shield plate and HVPS circuit Service man could ask the Assy or repair parts PCU room PCU Ass y Download Service Manual And Resetter Printer at http printer1 blogspot com ...

Page 44: ...After removing Cover Left you can see the SMPS Unplug the power connector and release the wire from the wire guide of the SMPS Remove four screws and separate SMPS from the frame You can see the fuser AC connector and 5V 24V connector which are connected to the microswitches Detach the wires from the SMPS Download Service Manual And Resetter Printer at http printer1 blogspot com ...

Page 45: ...ed when Top cover is closed namely interlock Switches for 24V for HVPS motor and for 5V for Laser beam The Bracket Duplex Ass y is located in the left upper side Remove the screws and detach the ass y from the Frame In order to remove the connector of Solenoid first remove Engine Controller Board Refer to Engine Controller Board disassembly 4 11 AC Connector 5V 24V Bracket Duplex Ass y Download Se...

Page 46: ...op you can see colored levers at each side of Transfer Roller push the levers which is attached in the Holder transfer Roller to release the Ass y Holder Transfer Roller Download Service Manual And Resetter Printer at http printer1 blogspot com ...

Page 47: ...city 250 sheets Facedown No faceup mode MP Tray 100 sheets 10 envelopes Envelop Feeder supported by Multi Purpose tray optional cassette Paper Cassette A4 LTR FO LEG EXE ISO B5 Handling Type of Media MP Tray Legal A6 OHP LABEL COM 10 MON DL C5 C6 Optional Cassette A4 LTR FO LEG COM 10 MONARCH DL C5 Duplexing Paper A4 LTR FO LEG Paper Sensor Yes CRU type Single cartridge Replacement CRU Life 8 000 ...

Page 48: ...puts Single 5V 10 power supply 2 4MB Flash memory option Postscript 12MB Standart P S Simm Module IEEE 1284 B type Option Interface Serial RS 232C Controller InfraRed Adaptor connector Local Talk Internal Network AIS AES Y Y Font 35 Intellifont 10 True Type 1Bit Map Ethernet TCP IP SPX IPX Port Thru 10 base T Apple Talk Network Printer Card SNMP in MIB NetBEUI NetBios TCP IP Netware Windows OS 2 U...

Page 49: ...ter s OUT output CON connector PIC picture GND ground pos positive or position HLDA hold acknowledge pot potential HLDAR hold acknowledge received psynrq page synchronizaton request HLDR hold request pwr power HOR horizontal qty quantity in inch es or input sw switch INTA interrupt Acknowledge sync synchronous or synchronization INT Interrupt tach tachometer INTR Interrupt request Vcc collector su...

Page 50: ...ccess PCB Printd Circuit Board Controller DVM Digital Voltmeter PCMCIA Personal Computer Memory Card International Association EEPROM Electronically Erasable Pro PLCC Plastic Leaded Chip Carrier grammable read Only Memory EGA Enhanced Graphics Adapter PMS Power Management System EISA Extended Industry Standard POST Power On Self Test Architecture ESDI Enhanced Small Device PPM Pages Per Minute Int...

Page 51: ...ser beam printer ML Series engines and for checking printer status The DCU can be used in common for ML series but each model has several different code description Refer to the code description for ML 7000 in next page Fig 1 1 ML 80 DCU Download Service Manual And Resetter Printer at http printer1 blogspot com ...

Page 52: ...OLIO paper tray 07 PE DS1 DS2 SENSOR TEST 20 PRINT START 1st CASSETTE 08 MP EXIT FEED SENSOR TEST 21 PRINT START MULTI PURPOSE 09 TOP REAR COVER OPEN 22 PRINT START 2 nd CASSETTE OUT BIN SENSOR TEST 23 PRINT START DUPLEX 10 FUSER TEST 50 PAPER OUT 11 HOT BURN TEST 60 OPEN FUSER ERROR 12 DUPLEX CLUTCH TEST 62 LOW HEATER ERROR 13 MULTI PURPOSE CLUTCH TEST 68 OVER HESTER ERROR 14 THERMISTER 2 TEST 61...

Page 53: ...TART Stasrts or stops the current diagnostic test Code Key Operation LED Display 00 ENTER Run Main Motor Lighten ON LED SHIFT STOP Stop Main Motor Lighten OFF LED UP Increment DCU Code No 01 MHV SHIFT DOWN Decrement DCU code No 13 MP 01 ENTER MHV ON Lighten ON LED SHIFT STOP MHV OFF Lighten OFF LED UP Increment DCU Code No 02 THV Negative SHIFT DOWN Decrement DCU code No 00 Main Motor 02 ENTER THV...

Page 54: ...user ON Lighten ON LED SHIFT STOP Fuser OFF Lighten OFF LED UP Increment DCU Code No 04 Dev SHIFT DOWN Decrement DCU code No 02 THV Negative 12 ENTER Duplex Clutch ON Lighten ON LED SHIFT STOP Duplex Clutch OFF Lighten OFF LED UP Increment DCU Code No 13 MP Cluth SHIFT DOWN Decrement DCU code No 11 Self Test 13 ENTER Multi Purpose Clutch ON Lighten ON LED SHIFT STOP Multi Purpose Clutch OFF Lighte...

Page 55: ... Pin Assignment 5 5 Trouble shooting of Video Controller 6 Exploded Views Parts List 6 1 Cover Ass y 6 2 Frame Ass y 6 3 Cassette Ass y 6 4 MP Tray Ass y 6 5 Pick Up Ass y 6 6 Fuser Ass y 6 7 Shield Ass y 6 8 Bracket Duplex Ass y 6 9 Bracket Motor Ass y 6 10 Frame SCF Ass y 6 11 Cassette SCF Ass y 6 12 Miscellaneous Items 7 Block Diagrams 7 1 Wiring Diagrams 7 2 Engine Controller 7 3 Video Control...

Page 56: ...may trip on the cord 6 Select a work surface that is lartge enough to hold the printer 7 Operate this printer using the power source 110V 220V etc indicated on the marking label If you are not sure of the type of power source available consult your dealer or local power company 8 If you need to use an extension power cord with this printer make sure that is uses a three wire grounded cord and that...

Page 57: ...CHT UNSICHTBARE SASERSTRAHLUNG WENN ABDECKUNG GEÖFFNET NICHT DEM STRAHL AUSSETZEN ATTENTION RAYONNEMENT LASER INVISIBLE EN CAS D OUVERTURE EXPOSITION DANGEREUSE AU FAISCEAU ATTENZIONE RADIAZIONE LASER INVISIBLE IN CASO DI APETURA EVITARE L ESPOSIZIONE AL FASCIO PRECAUCION RADIACION LASER IVISIBLE CUANDO SE ABRE EVITAR EXPONERSE ALRAYO ADVARSEL USTNLIG LASERSTRÄLNING VED ÄBNING NÄR SIKKERHEDSBRYDER...

Page 58: ... SamsungElectronicsCo Ltd Sep 1998 PrintedinKorea P N JC68 00034ARev1 00 ELECTRONICS Download Service Manual And Resetter Printer at http printer1 blogspot com ...

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