Error Messages and Codes 3-27
Laser Unit Failure
Error Codes
Laser Fails at warm-up; U2-1 Laser Fail / Power Off
Laser Fails Motor Speed; U2-2 Laser Fail/ Power Off
LD Power is high; U2-3 Laser Fail/ Power Off
LD Power is low; U2-4 Laser Fail/ Power Off
Troubleshooting Reference
Applicable Parts Wiring and Plug/Jack Map References
■ Laser Unit Assembly
■ HVPS/Engine Logic Board
■ Print Cartridge
■ Laser Unit Assembly Harness
■ LVPS
■ “Laser Unit, 5 V Interlock, Interlock Switch
Assembly” on page 10-24
■ “Print Cartridge, Transfer Roller Assembly” on
page 10-21
■ “24 V Interlock, Rear Cover Switch, Main Motor, Sub
Fan, Exit Motor Assembly” on page 10-18
■ “Print Engine General Wiring Diagram” on
page 10-17
■ “Print Engine Plug/Jack Locator” on page 10-3
Troubleshooting Procedure
Steps Actions and Questions Yes No
1
Enter Service Diagnostics and select
Engine NVRAM Adjustments.
Is the Laser Power setting at the factory
default value of 4?
Go to “Laser Unit
Assembly” on
page 4-13.
Go to Step 2.
2
Set Laser power to default value of 4, and
then check again.
Does the error still occur?
Go to “Laser Unit
Assembly” on
page 4-13.
Problem solved.
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