Fig 1-122 Fuser Assembly; Table 1-29 Error Code U1-1 Motor Failure Power Off/On - Xerox DOCUPRINT N4525 Service Quick Reference Manual

RAP 1-1
Error Code U1-1
There is a problem with the Main Motor.
Logic Control on the Print Engine Controller Board detected a problem with the Main
Motor.

Table 1-29 Error Code U1-1 Motor Failure Power Off/On

Step Actions and Questions
1 DRIVE ASSEMBLY INSPECTION
1. Remove the Rear Cover (RRP 1-5) so you can
observe the Main Motor and Drive Assembly.
2. Hand rotate (counter clockwise) the Main Motor.
Can you easily rotate the Main Motor and do all
of the gears on the Main Drive Assembly rotate
freely and without binding?
DRIVE ASSEMBLY INSPECTION
2
1. Remove the Laser Print (EP) Cartridge.
2. Hand rotate (counter clockwise) the Main Motor.
Can you easily rotate the Main Motor and do all
of the gears on the Main Drive Assembly rotate
freely and without binding?
SUBSYSTEM ISOLATION
3
1. Open the Left Cover A.
2. Touching only the drive gear at the end of the Roller,
hand rotate the Bias Transfer Roller.
Can you easily rotate the Bias Transfer Roller?
4 SUBSYSTEM ISOLATION
1. Remove the Fuser Assembly.
2. Hand rotate (counter clockwise) the Main Motor.
Can you easily rotate the Main Motor and do all
of the gears on the Main Drive Assembly rotate
freely and without binding?
5 SUBSYSTEM ISOLATION
1. Remove the Offset Unit (RRP 1-54).
2. Hand rotate (counter clockwise) the Main Motor.
Can you easily rotate the Main Motor and do all
of the gears on the Main Drive Assembly rotate
freely and without binding?
6 SUBSYSTEM ISOLATION
1. Remove the Tray 1 Feed Clutch (RRP 1-10).
2. Hand rotate (counter clockwise) the Main Motor.
Can you easily rotate the Main Motor and do all
of the gears on the Main Drive Assembly rotate
freely and without binding?
1-46 DocuPrint N4525 Network Laser Printer - Service Guide
Motor Failure
Power Off/On
Yes
Go to step 8
Replace the
Laser Print
Cartridge with
a new one.
Go to step 4
Replace the
Fuser
Assembly
Replace the
Offset Unit
(RRP 1-54)
Replace the
Tray 1 Feed
Clutch (RRP
1-10)
No
Go to step 2
Go to step 3
Replace the
Left Upper
Cover (A)
Assembly
(RRP 1-42)
Go to step 5
Go to step 6
Go to step 7