Error Troubleshooting
Xerox Internal Use Only Phaser 6600 and WorkCentre 6605
Service Manual
2-199
077-300 IOT Cover Front Open
077-301 IOT Side Cover Open
Step Check Yes No
Possible causative parts:
• Front Cover Sensor (PL18.1.45)
• MCU Board (PL18.1.13)
1 Check the Front Cover Sensor operation
Execute Digital Input diagnostic test 041-302, and check the
Front Cover Sensor operation.
Does it function normally?
Replace the MCU
Board.
Go to step 2.
2 Check the Front Cover Sensor connection
Check the connection between the Front Cover Sensor and
the MCU Board.
Are P/J145 and P/J14 connected securely?
Go to step 3. Connect P/J145
and P/J14
securely.
3 Check the power to the Front Cover Sensor (+5 VDC)
Check if the voltage between the MCU Board ground and the
P/J14-9 pin is about +5 VDC.
Replace the Front
Cover Sensor.
Refer to
page 2-223.
Step Check Yes No
Possible causative parts:
• Door Interlock Switch (PL19.1.21)
• LVPS (PL18.1.34)
1 Check the Door Interlock Switch operation
Execute Digital Input diagnostic test 041-300, and check the
Door Interlock Switch operation.
Does it function normally?
Replace the MCU
Board.
Go to step 2.
2 Check the Door Interlock Switch connection
Check the connection between the Door Interlock Switch and
the LVPS.
Is P/J42 connected securely?
Go to step 3. Connect P/J42
securely.
3 Check after replacing the Door Interlock Switch
Replace the Door Interlock Switch.
Does the error still occur?
Replace the LVPS. Finished.
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