Phaser 7500 Printer Service Manual 3-99
Error Messages and Codes
MCU PWB F8 Blows
Fuse 8 on the MCU PWB has broken.
Remove the cause of Fuse failure before replacing the MCU PWB.
Applicable Chain-Link Code
• 041-331: PWBA MCU F8 Fuse Break Fail
Initial Actions
• Power cycle the printer.
• If the problem persists, follow the procedure below.
1. Check the following parts circuits for overcurrent and overvoltage, grounded
wires, and then replace the faulty parts or repair the circuits, and replace the
Fuse.
•MOB ADC Assembly (REP 18.3, page 8-189)
2. Replace the MCU PWB (REP 18.12, page 8-202).
Troubleshooting Reference
Applicable Parts Wiring and Plug/Jack Map References
■ MOB ADC Assy, PL18.1.4
■ MCU PWB, PL18.3.6
■ Fuse
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