Laser Motor Failure And 0310 Laser Unit Failure - Xerox Phaser 6121MFP Service Manual

0300 Laser Motor Failure and 0310 Laser Unit Failure

Phaser 6121MFP Service Manual
Troubleshooting Procedure Table (continued)
Step Action and Questions
4 Check the 2nd Image Transfer
Retraction Position Solenoid for proper
drive coupling and correct as
necessary.
Does the problem persist?
5
Check the 2nd Image Transfer
Retraction Position Sensor control
signal for a voltage change at P/J12-3
on the Engine Control Board.
Is the signal operating correctly?
6 Replace the 2nd Image Transfer
Retraction Position Solenoid.
Does the problem persist?
7
Replace the 2nd Image Transfer
Retraction Position Sensor.
Possible causes:
• The Polygon Motor does not rotate evenly even after the lapse of a given
period of time after it has been started.
• The motor lock signal remains HIGH for a given period of consecutive time
while the Polygon Motor is being rotated.
• The SOS signal is not detected within a given period of time after the output
of the laser has been started.
Initial Actions
Power down and reboot the printer.
Procedure
Troubleshooting Reference Table
Applicable Parts
Laser Unit, PL4.0.13
Engine Control Board, PL13.0.20
Power Supply, PL13.0.17
Error Messages and Codes
Yes No
Go to step 5. Complete.
Go to step 6. Replace the
Engine Control
Board
(page 8-59). If
the problem
persists, go to
step 6.
Go to step 7. Complete.
Complete.
Wiring and Plug/Jack References
Board Locations (page 2-10)
Map 1 - Engine Control Board
Plug/Jack Locator (page 10-5)
Engine Control Board Wiring
(page 10-14)
3-77