Transparency Sensor Fail - Xerox Phaser 7500 Service Manual

Transparency Sensor Fail

Phaser 7500 Printer Service Manual
An abnormal value was detected from the Transparency Sensor.
Applicable Chain-Link Code
• 077-602: OHP Sensor Fail
Initial Actions
• Power cycle the printer.
• If the problem persists, follow the procedure below.
Troubleshooting Reference
Applicable Parts
MCU PWB, PL18.3.6
■
Motor Drive PWB, PL18.3.7
■
1. Perform the following steps:
• Check the Transparency Sensor and Reflective Prism for contamination
and improper installation.
• Is the transparency used out of specification (refer to
Specifications" on page
• Perform the OHP Sensor test in Diagnostics.
• Check the connection between the Transparency Sensor J161 and the
Motor Drive PWB J515 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,
• MCU PWB (REP 18.12,
Error Messages and Codes
Wiring and Plug/Jack Map References
1-19)?
page 8-204)
page 8-202)
"Paper and Tray
3-219