Xerox Phaser 4510 - Laser Unit Assembly

4-12 Phaser 4500/4510 Service Manual
General Troubleshooting
Laser Unit Assembly
5 Turn ON the printer.
Does the main motor rotate?
Problem
solved.
Replace the
HVPS/engine
logic board
(page 8-73),
then go to
step 6.
6 Turn ON the printer.
Does the main motor rotate?
Problem
solved.
Replace the
main motor
(page 8-55).
Troubleshooting Reference
Applicable Parts Wiring and Plug/Jack Map References
■ Laser unit assembly
■ Laser unit harness assembly
■ 5 V Interlock
■ LVPS harness assembly
■ HVPS/engine logic board
■ LVPS
■ “Laser Unit, 5 V Interlock, Interlock Switch
Assembly” on page 10-29
■ “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 1. Remove the top cover assembly
(page 8-9).
2.Disconnect P/J140 from laser unit
assembly.
3.Reinstall the top cover assembly.
4.Install the print cartridge and close the
top cover.
5.Measure the voltage across J140-8 <=>
J140-7.
Does the voltage measure +5 VDC?
Go to step 8. Go to step 2.
Troubleshooting Procedure (continued)
Steps Actions and Questions Yes No