3-214 Phaser 7500 Printer Service Manual
Error Messages and Codes
L/H Cover Interlock Open
The L/H Cover is open.
Applicable Chain-Link Code
• 077-301: Left Hand Cover Open
Initial Actions
• Power cycle the printer.
• If the problem persists, follow the procedure below.
1. Perform the following steps:
• Check the L/H Cover Unit for damage or mismatch.
• Perform the Interlocks test in Diagnostics.
• Check the connection between the L/H Cover Interlock Switch J100 and
the Motor Drive PWB J521 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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