Xerox Phaser 7760 Service Manual page 90

004-421 IBT Belt Cleaner Life End
IBT Belt Cleaner Assembly end of life.
Procedure
Replace the IBT Belt Cleaner Assembly
Y N
Return to Service Call Procedures.
Was the IBT Belt Cleaner Assembly HFSI Counter reset.
Y N
Reset the IBT Belt Cleaner Assembly Counter.
If the problem continues, replace the Engine Control Board (MCU PWB)
Careful replacement of the MCU NVRAM PWB is important to avoid serious machine failure.
If the problem continues, replace the Engine Control Board (MCU PWB) NVRAM
Status Indicator RAP's
004-421, 004-435
(PL 5.3). The problem continues.
(PL 13.1).
CAUTION
004-435 HVPS Comm. Fail
HVPS Communication failure.
Procedure
1. Check for poor connection at the blue-wired connector J574.
2. Turn off the printer and check the wiring between J574 and J411 for continuity or a
shorted to ground condition.
3. If the wiring is OK, replace the HVPS Board
4. If the HVPS Board does not correct the error, then replace the Engine Control Board
(MCU PWB) (REP
(PL 13.1).
January 2010
2-54
(REP 1.7).
1.2).
Phaser 7760 Color Laser Printer
Revised