Phaser 7500 Printer Service Manual 3-59
Error Messages and Codes
Duplex Wait Sensor On Jam
The Duplex Wait Sensor does not turn On within the specified time after the Exit
Motor has started rotating in the Duplex intake direction.
Applicable Chain-Link Code
• 077-131: Duplex Path Sensor On Jam
Initial Actions
• Check the paper path for debris.
• Power cycle the printer.
• If the problem persists, follow the procedure below.
1. Check the paper transportation failure due to debris/ burrs on the paper path.
2. Check each Duplex Roll and Pinch Roll for contamination, wear, and rotation
failure.
3. Check each Exit Roll and Pinch Roll for contamination, wear, and rotation
failure.
4. Check each Duplex Roll Drive Gear for wear and damage.
5. Check each Exit Roll Drive Gear for wear and damage.
6. Is paper used out of specification (refer to “Paper and Tray Specifications” on
page 1-19?
7. Check the Duplex Wait Sensor for contamination, improper installation, and
Actuator operation failure.
8. Perform the Jam Sensors test in Diagnostics.
9. Check the connection between the Duplex Wait Sensor J175 and the Motor
Drive PWB J524 for open circuit, short circuit, and poor contact.
10. Perform the Duplex Motor test in Diagnostics.
11. 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
■ Duplex Assy, PL14.5.1
■ Exit Assy, PL17.1.1
■ MCU PWB, PL18.3.6
■ Motor Drive PWB, PL18.3.7
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