3-216 Phaser 7500 Printer Service Manual
Error Messages and Codes
Duplex Cover Open
The Duplex Cover Open was detected.
Applicable Chain-Link Code
• 077-307: Duplex Cover Open
Initial Actions
• Power cycle the printer.
• If the problem persists, follow the procedure below.
1. Perform the following steps:
• Check the Duplex Cover for damage or mismatch.
• Perform the Switches test in Diagnostics.
• Check the connection between the Duplex Cover Switch J176 and the
Motor Drive PWB J524 for open circuit, short circuit, and poor contact.
2. 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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