Phaser 4500/4510 Service Manual 3-29
Error Messages and Codes
Laser Unit Failure
Diagnostic 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 10-29
■ “Print Cartridge, Transfer Roller Assembly” on
page 10-26
■ “P4500: 24 V Interlock, Rear Cover Switch,
Main Motor, Sub Fan, Exit Motor Assembly” on
page 10-21
■ “Print Engine Wiring Diagrams” on page 10-19
■ “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 4-12.
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 4-12.
Problem solved.
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General
Weight and Dimensions
