Xerox PHASER 7500 - MCU PWB F7 Blows

3-98 Phaser 7500 Printer Service Manual
Error Messages and Codes
MCU PWB F7 Blows
Fuse 7 on the MCU PWB has opened.
Note
Remove the cause of Fuse failure before replacing the MCU PWB.
Applicable Chain-Link Code
• 041-330: PWBA MCU F7 Fuse Break Fail
Initial Actions
• Power cycle the printer.
• If the problem persists, follow the procedure below.
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, page 8-206)
•HV Fan (REP 4.3, page 8-40)
• 1st BTR Contact Retract Clutch
• Takeaway Clutch (REP 15, 1, page 8-172)
2. Replace the MCU PWB (REP 18.12, page 8-202).
Troubleshooting Reference
Applicable Parts Wiring and Plug/Jack Map References
■ 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