Mcu Pwb F7 Blows - Xerox Phaser 7500 Service Manual

Error Messages and Codes

MCU PWB F7 Blows

Applicable Chain-Link Code
Initial Actions
3-98
Fuse 7 on the MCU PWB has opened.
Note
Remove the cause of Fuse failure before replacing the MCU PWB.
• 041-330: PWBA MCU F7 Fuse Break Fail
• Power cycle the printer.
• If the problem persists, follow the procedure below.
Troubleshooting Reference
Applicable Parts
1st BTR Contact Retract
■
Clutch, PL3.2.12
HV Fan, PL4.3.4
■
Takeaway Clutch, PL15.1.1
■
MCU PWB, PL18.3.6
■
Drive Fan, PL18.3.17
■
Fuse
■
1. Check the following parts circuits for over current and overvoltage, grounded
wires, and then replace the faulty parts or repair the circuits, and replace the
Fuse.
• Drive Fan (REP 18.15,
• HV Fan (REP 4.3, page
• 1st BTR Contact Retract Clutch
• Takeaway Clutch (REP 15, 1,
2. Replace the MCU PWB (REP 18.12,
Wiring and Plug/Jack Map References
page 8-206)
8-40)
page 8-172)
page 8-202).
Phaser 7500 Printer Service Manual