Phaser 7500 Printer Service Manual 3-213
Error Messages and Codes
Front Cover Interlock Open
The Front Cover is open.
Applicable Chain-Link Code
• 077-300: Front Cover Open
Initial Actions
• Power cycle the printer.
• If the problem persists, follow the procedure below.
1. Perform the following steps:
• Check the Front Cover for damage or mismatch.
• Perform the Interlocks test in Diagnostics.
• Check the connection between the Front Cover Interlock Switch J101 and
the Motor Drive PWB J519 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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