Samsung ML-1651N, ML-1650 specifications Self Diagnostic Mode

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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. If 00 shows in the DCU, press the button [Up] or [Shift] to select the self+test , and press the button of [Enter] to operate. To stop, press the button of [shift] and [Enter] together.

00Main Motor Operating System Only the main motor is in operation.

01

Main High Voltage On(THV-)

 

 

-1400 voltage output by MHV terminal.

Caution : High voltage probe should be used.

 

 

 

02

Transfer High Voltage(-)On(THV-)

 

 

-1000 voltage output by MHV terminal.

Caution : High voltage probe should be used.

 

 

 

03

Transfer High Voltage (+)Reference on (THV +)

 

 

+800 voltage output by MHV terminal.

Caution : High voltage probe should be used.

04DEV/supply High Voltage : DEV/Supply High Voltage Test.

The left one of the three LEDs in the self-test panel is on when DEV high voltage Supply high voltage output

by each HV terminal(-500V). Press the [Up] button to switch the voltage. The middle and right one of the three

LEDs are on and -650 voltage output by DEV HV terminal. Caution : High voltage probe should be used.

05

LSU Operating System

 

The scanning motor of LSU is in operation, the right LED of the three buttons on. Press the [Up] button to

 

Check LD. LD is functioning and the middle button is on. If the LD is normal, all LEDs are on.

06Pickup clutch on

The Solenoid in the printer is in operation. To stop the operation, Press the button [shift] and [Enter] together.

07Paper Empty(1st, SCF, MF) Sensor Test :

If activate the Actuator of the PEMPTY/PWIDTH Sensor, the left and right of the three LEDs are on.

Paper Empty Sensor (1st) ON/OFF

1st LED ON/OFF

Paper Empty Sensor (SCF) ON/OFF

2nd LED ON/OFF

Paper Empty Sensor (MP) ON/OFF

3rd LED ON/OFF

Increment DCU Code No. (08, Sensor TEST)

 

08Feed & Exit Sensor Test

Test the Feed sensor and Discharge sensor in the same way as '06'.

09Cover Open Sensor Test The same way as code '06'.

10Fuser Test

If the [Enter] button pressed, the right LED is on and temperature of the fuser is up to READY Mode. If the [Up] button pressed, the middle LED is on and temperature of the fuser is up to Printing Mode.

If you press the button once more, the left LED is on and temperature of the fuser is up to overheat Mode.

11Hot Burn Test

If the [enter] button pressed, the printer is continuously printing without detection. Turn the power off to stop operation.

12Cleaning Mode Print Mode

Print the paper to clean the OPC Drum in the Cartridge.

Samsung Electronics

4-3

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Contents Laser Printer Version no This manual is stated and provided for service description Read each caution carefully Safety PrecautionsReleasing Plastic Latches Precautions on Disassembly and ReassemblyElectronic Scale Tools for TroubleshootingToner ML-1650 ML-1651N EngineController PaperNetwork ML-1650 ML-1651N EnvironmentGeneral Precautions on Disassembly Releasing Plastic LatchesWhenever servicing the machine, you must perform as follows Transfer Roller Controller Board Pickup Assembly Main Cover MP Multi-Purpose Tray Exit AssemblyHvps board LSUSolenoid 10 FanDrive Assembly To remove the halogen lamp from the fuser assembly Fuser AssemblyTo remove the thermistor from the fuser assembly To remove the thermostat from the fuser assemblyGuide Feed & Erase Lamp MPF Assembly and Miscellaneous on MPF Assembly To replace the nockup plateTo replace the pickup roller To replace the Paper Empty PE sensor To replace the pickup holder and the Adjust End MPEngine Board and Miscellaneous To replace the exit board To remove the transfer guide To replace the actuator feedCause and solution of the malfunction How to use DCUCause and solution of Bad image Cause and solution of the bad dischargeHow to use DCU DCU SetupCode Self Diagnostic Mode Paper Path Layout Self Test ButtonDCU Panel ML-1650 Diagnostic Control Unit Quick ReferanceVertical White Line Cause and solution of Bad imageCheck and Cause Solution Vertical Black Line and BandBlack/White Spot Horizontal Black BandDark Image or a Black Light ImageBackground Uneven DensityGhost Satins on the Face Blank Page Print out Satins on BackCause and solution of the bad discharge Wrong Print Position2 JAM 4 JAM 3 JAMPaper rolled in the fuser Multi-Feeding7 OPC Cause and solution of the malfunction All LEDs blinking Fuser ErrorAll LEDs blinking Scan Error Not function of the gear of the fuser due to melting away Paper EmptyPaper Empty without indication Cover Open No lamp on when the cover is openDefective motor operation No PowerVertical Line Getting Curved Toner Cartridge Service Image Fault Signs Cause & Check Solution Light imageSigns and Measures at Poor toner cartridge Partially blankRecycled product Fault Signs Cause & Check Solution White Black spotFault Signs Cause & Check Solution Ghost & Image Printer is not working Cause and solutions of bad environment of the softwareUtilities program Abnormal Printing How to delete the data in the spool manager Spool ErrorExploded Views and Parts List Service Parts List Exploded Views and Parts List10-3 10-4 Cover Exploded View All Exploded Views and Parts ListFrame Exploded View Exit Exploded View Rack-MPF Exploded View Fuser Exploded View Drive Exploded View Pick-Up Exploded View Cassette Exploded View Video ControllerBlock Diagram Block DiagramSensor Engine Block DiagramVPS Connection Diagram
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ML-1650, ML-1651N specifications

The Samsung ML-1651N and ML-1650 are reliable monochrome laser printers designed for small to medium-sized businesses and home offices. These printers offer a blend of performance, efficiency, and affordability, making them suitable for various printing needs.

One of the standout features of both models is their print speed. The ML-1651N boasts a speed of up to 22 pages per minute, while the ML-1650 offers a slightly lower speed but still impressive for standard office tasks. This fast output is complemented by a first page print time of approximately 8.5 seconds, ensuring that users can quickly produce documents without unnecessary delays.

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