Xerox Phaser 4500, Service Manual, Page: 164 / 537

General Troubleshooting 4-11
Print Engine Troubleshooting
Main Motor
Troubleshooting Reference
Applicable Parts Wiring and Plug/Jack Map References
■
Main Motor
■
LVPS Harness Assembly
■
LVPS
■
HVPS/Engine Logic Board
■
“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 1. Remove the Print Cartridge.
2. Close the Top Cover.
3. Turn ON power and listen for the sound
of the Main Motor.
Does Main Motor rotate?
Go to step 2. Go to step 3.
2 Is the trouble eliminated? Problem solved. Go to step 3.
3 Check the LVPS Harness Assembly for
continuity:
1. Remove the LVPS Shield Plate
(page 8-75).
2. Disconnect P/J41 from the LVPS.
3. Disconnect P/J11 from the HVPS/
Engine Logic Board.
Is each cable of P/J41 <=> P/J11
continuous?
Go to step 4. Replace the
LVPS Harness
Assembly.
4 1. Remove the LVPS Shield Plate.
(page 8-75)
2. Disconnect P/J42 from the LVPS.
3. Disconnect P/J10 from the HVPS/
Engine Logic Board.
4. Check each wire in the LVPS Harness
(2) between P/J42 and P/J10 for
continuity.
Does each wire in the harness exhibit
continuity?
Replace the LVPS
(page 8-78), then
go to step 5.
Replace the
LVPS Harness
Assembly.