January 2010
2-54
Phaser 7760 Color Laser Printer
004-421, 004-435
Revised
Status Indicator RAP’s
004-421 IBT Belt Cleaner Life End
IBT Belt Cleaner Assembly end of life.
Procedure
Replace the IBT Belt Cleaner Assembly (PL 5.3). The problem continues.
YN
Return to Service Call Procedures.
Was the IBT Belt Cleaner Assembly HFSI Counter reset.
YN
Reset the IBT Belt Cleaner Assembly Counter.
If the problem continues, replace the Engine Control Board (MCU PWB) (PL 13.1).
CAUTION
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 (PL 13.1).
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 (REP 1.7).
4. If the HVPS Board does not correct the error, then replace the Engine Control Board
(MCU PWB) (REP 1.2).
To Next Page