3-62 Phaser 7500 Printer Service Manual
Error Messages and Codes
POB Sensor Static Jam
When the power was turned On, the M/C was stopped (Cycle Down/ Shut Down),
or when the interlocks were closed (all interlocks including options), the POB Sensor
detected paper.
Applicable Chain-Link Code
• 077-903: IOT Static Jam (at POB Sensor)
Initial Actions
• Check the paper path for debris.
• Power cycle the printer.
• If the problem persists, follow the procedure below.
1. Check the POB Sensor for remaining paper, contamination, or improper
installation.
2. Perform the Jam Sensors test in Diagnostics.
3. Check the connection between the POB Sensor J180 and the Motor Drive PWB
J524 for short circuit.
4. If no problems are found, replace the following parts in sequence:
• Motor Drive PWB (REP 18.13, page 8-204)
• MCU PWB (REP 18.12, page 8-202)
Troubleshooting Reference
Applicable Parts Wiring and Plug/Jack Map References
■ MCU PWB, PL18.3.6
■ Motor Drive PWB, PL18.3.7
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