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LASER PRINTER
ML-1650Series
ML-1650 / ML-1651N
Manual
SERVICE
LASER PRINTER CONTENTS
1. Precautions
2. Specifications
3. Disassembly and Reassembly
4. Troubleshooting
5. Exploded Views and Parts List
6. Block Diagram
7. Connection Diagram
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This service manual is also provided on the web, © Samsung Electronics Co.,Ltd. September 2001 the ITSELF system f Samsung Electronics Co., Ltd. Printed in Korea. “http://itself.sec.samsung.co.kr” VERSION NO. : 2.00 CODE : JC-0055A
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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. 6.
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Precautions 1. Precautions Please read the following carefully to prevent any accidents and not to damage the unit during service. 1-1 Safety Precautions Read each caution carefully: Especially mind the safety on the part with this mark. 1. Do not use this printer near water or when exposed to inclement weather. You must use regular parts described in specifi- cations for the parts inflammable and where the 2. Do not place this printer on an unstable cart, stand or current can be flown. Otherw
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Precautions 1-2 Precautions on Disassembly and Reassembly Very careful precautions should be taken when replacing 7. When disassembling, assembling, also observe small parts. Before replacing, please check cables because components are located in place. you cannot put the cables that you removed for replacing 8. If you uncover and turn the machine over to replace parts into the proper place if you would not make sure of some parts, toner or paper particles may contaminate where they were connec
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Precautions 1-3 Tools for Troubleshooting The following tools are recommended for safe and smooth troubleshooting described in this service manual. DCU(Diagnostic Control Unit) Driver 4 1 Standard: Test equipment to diagnose the Laser Standard: "-" type, "+" type (M3 long, M3 short, printer supplied by Samsung Electronics. M2 long, M2 short). Pinset 5 Standard: For general home use, small type. Cotton Swab DVM(Digital Volt Meter) 6 Standard: For general home use, for medical ser- 2 Standard: I
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Specifications 2. Specifications ML-1650 ML-1651N Engine Speed 17 PPM(Letter) , 16PPM(A4) Resolution 1200 * 1200 First Print Time Tray 1 : Less than 14 seconds Tray 2 : Less than 17 seconds Warm-Up Time Less than 40 seconds Power Consump. Print : 300 W, Sleep mode : Less than 20 W Dimension(W * D * H) 361 x 409 x 294.5 mm Weight 12.4 Kg/27.3lb (SET) Acoustic Noice Stand by : Less than 35 dB, Operating : Less than 49dB Power Rating AC 100~127V , 50 Hz AC 220~240V , 60 Hz Controller Processor Po
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Specifications ML-1650 ML-1651N Environment Operation Environment Temperature 10 ~32˚c (50˚F ~ 90˚F) Humidity 20 ~ 80 % RH Storage Environment Temperature -200 ~40˚c (4˚F ~ 104˚F) Humidity 10 ~90 % RH Network Operating Systems Windows 95/98 and Windows NT (3.51, 4.x ) Netware (3.x, 4.x), NDS and Bindery Mode /RPRINT, PSERVER Mode UNIX and Apple Talk Network Network Protocols Supported TCP/IP : Windows 95/98, Windows NT, UNIX IPX/SPX : Windows 95/98, Novell Netware DLC/LLC : Windows 95/98, Windo
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Disassembly and Reassembly 3. Disassembly and Reassembly 3-1 General Precautions on Disassembly When you disassemble and reassemble components, you must use extreme caution. The close proximity of cables to moving parts makes proper routing a must. If components are removed, any cables disturbed by the procedure must be restored as close as possible to their original positions. Before removing any component from the machine, note the cable routing that will be affected. Whenever servicing the ma
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Disassembly and Reassembly 3-2 Transfer Roller 1. Open the printer cover. 3. Hold the cap at the both end of the roller, then remove the roller. 2. Remove the cap. Samsung Electronics 3-2
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Disassembly and Reassembly 3-3 Controller Board 1. Remove two screws and remove the 2. Remove five screws securing the board and controller cover. unplug all connectors, and then take the controller board out of the printer. Samsung Electronics 3-3
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Disassembly and Reassembly 3-4 Pickup Assembly 1. Turn the printer upside down. Remove four 4. Take the assembly out. screws, then remove the bar cross bottom. Push the solenoid if you have difficulty to 2. Remove three screws from the left base remove the pickup bracket, and take the bracket out. assembly. 5. Check the pickup rubber wear. If the rubber is heavily worn, replace it with a new one. 3. Remove four screws securing the pickup assembly. Squeeze this tab to remove the rubber. Sa
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Disassembly and Reassembly 3-5 Main Cover 1. Remove two screws and remove the controller 4. Remove two screws securing the main cover. cover. 2. Remove two screws at the back of the printer and 5. Unlatch the front ends of the cover. unplug one connector from the board, then open the rear cover. 3. Open the printer cover, and open the MP tray. |6. Slide the main cover upward, out of the printer. Note that the power switch and the power connecter are properly released when you remove the
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Disassembly and Reassembly 3-6 MP (Multi-Purpose) Tray 1. Before you remove the MP tray, you should remove: -Main Cover (see page 3-5) 2. Remove the stoppers securing the MP tray. 3-7 Exit Assembly 1. Before you remove the exit assembly, you 3. If you want to remove the roller shaft, unlatch should remove: both ends of the shaft and take it out. -Main Cover (see page 3-5) 2. Remove the exit tray in the direction of arrow. 4. If you want to remove the exit roller, squeeze the bottom of
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Disassembly and Reassembly 3-8 LSU 1. Before you remove the LSU, you should remove: -Main Cover (see page 3-5) -Exit assembly (see page 3-7) 2. Remove five screws, and remove the LSU. Then unplug two connectors from the LSU. 3-9 HVPS board 1. Before you remove the HVPS board, you should remove: -Main Cover (see page 3-5) 2. Remove four screws and take the HVPS board out. Samsung Electronics 3-7
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Disassembly and Reassembly 3-10 Fan 1. Before you remove the fan, you should remove: 3. Remove one screw, and remove the fan. -Main Cover (see page 3-5) Then unplug one connector. 2. Remove two screws securing the connector cover and harness bracket from the gear bracket. 3-11 Solenoid 1. Before you remove the solenoid, you should remove: -Main Cover (see page 3-5) 2. Remove two screws, and remove the solenoid. Then unplug one connector. Samsung Electronics 3-8
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Disassembly and Reassembly 3-12 Drive Assembly 1. Before you remove the drive assembly, you 4. If you want to remove the step motor, remove should remove: four screws securing the step motor from the motor bracket and unplug two connector from -Main Cover (see page 3-5) the motor. -Fan (see page 3-9) 2. Remove four screws securing the drive assembly from the gear bracket and unplug one connector from the motor, and then take the drive assembly out. 3. If you want to remove
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Disassembly and Reassembly 3-13 Fuser Assembly 1. Before you remove the fuser, you should remove: ♦ To remove the thermistor from the fuser assembly : -Main Cover (see page 3-5) Remove one screw, and release the wire from the three holders, and then take the thermistor out. 2. Remove four screws and unplug one conne- ctor, and then remove the fuser assembly. ♦ To remove the thermostat from the fuser ♦ To remove the halogen lamp from the fuser assembly assembly : Remove two screws and take t
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Disassembly and Reassembly 3-14 Guide Feed & Erase Lamp 1. Before you remove the guide feed & PTL, you 4. Remove the guide feed& erase PTL. should remove: -Main Cover (see page 3-5) 2. Release the latches on the erase lamp from the MPF ASS’Y and unplug one connector, then remove the PTL. 3. Remove three screws and raise the guide feed in the direction of arrow. Samsung Electronics 3-11
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Disassembly and Reassembly 3-15 MPF Assembly and Miscellaneous on MPF Assembly 1. Before you remove the MPF assembly, you ♦ To replace the nockup plate : should remove: 1. Turn the gear shown in the square in the -Main Cover (see page 3-5) direction of arrow to release the nockup plate. 2. Unplug two connectors and remove five screws, and then take the MPF assembly out. 2. Remove the spring , then release the right end of the plate. ♦ To replace the pickup roller : 1. Remove the e-ring. 3
