Error Troubleshooting
Phaser 7100 Service Manual Xerox Internal Use Only2-442
Belt Retract Sensor
Troubleshooting Reference
Applicable Parts Wiring and Plug/Jack Map References
•Front Harness Assembly, PL 4.2.11
• Belt Retract Sensor (IBT Retract Cam Assembly), PL 9.1.8
• MCU PWB, PL 12.1.15
• Main Harness Assembly, PL 12.3.1
• Transfer on page 7-54
Troubleshooting Procedure
Step Actions and Questions Yes No
1. Check the Belt Retract Sensor operation.
Perform DC330 Component Control on
page 2-26 [094-200] to check the operation of
the Belt Retract Sensor.
Is the Belt Retract Sensor operating properly?
Replace the MCU PWB
(REP 12.4 MCU PWB
on page 4-206).
Go to step 2.
2. Check the connection between the Belt Retract
Sensor and MCU PWB.
Are the connectors P/J4663, P/J4661, and P/J466
connected securely?
Go to step 3. Connect the
connectors P/J4663,
P/J4661, and P/J466.
3. Check the conductivity between the Belt Retract
Sensor and Relay Connector.
Is the connection between P/J4663 <=> P/J4661
conducting properly?
Go to step 4. Replace the Front
Harness Assembly.
4. Check the conductivity between the Relay
Connector and MCU PWB.
Is the connection between P/J4661 <=> P/J466
conducting properly?
Go to step 5. Replace the Main
Harness Assembly.
5. Check the voltage supply (+3.3VDC) to the Belt
Retract Sensor.
Measure the voltage between the MCU PWB
GND <=> P/J466-4.
Is there a voltage (approx. +3.3VDC) output?
Replace the IBT
Retract Cam Assembly
(REP 9.6 IBT Retract
Cam Assembly on
page 4-168).
Go to +3.3VDC Power
Troubleshooting on
page 2-458.
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