Main Motor Failure - Xerox Phaser 4500 Service Manual

Error Messages and Codes

Main Motor Failure

3-28
Diagnostic Error Code
U1: Main Drive Motor Failure
Troubleshooting Reference
Applicable Parts
Main motor
Gear assembly housing
Plate gear assembly
LVPS
HVPS/engine logic board
Troubleshooting Procedure
Steps Actions and Questions
1. Remove the left cover (page 8-8).
1
2. Enter Service Diagnostics and check
main motor operation.
Does the main motor rotate, and
each gear rotate normally?
Rotate and check each gear of the gear
2
assembly housing and plate gear
assembly.
Does each gear rotate normally?
Wiring and Plug/Jack Map References
"P4500: 24 V Interlock, Rear Cover Switch,
Main Motor, Sub Fan, Exit Motor Assembly" on
page 10-21
"Laser Unit, 5 V Interlock, Interlock Switch
Assembly" on page 10-29
"Print Engine Wiring Diagrams" on page 10-19
"Print Engine Plug/Jack Locator" on page 10-3
Yes
Replace the
HVPS/engine
logic board.
(page 8-73)
Go to "Main
Motor"
(page 4-11).
Phaser 4500/4510 Service Manual
No
Go to step 2.
Replace the
parts causing
the obstruction.