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January 2000 © TOSHIBA TEC 4 - 27 FC-22 TROUBLESHOOTING
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C37 Transfer belt motor rotation abnormal
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Before performing the following checks, be sure to place the transfer belt unit in a lowered position;
otherwise, the drums and the transfer belt would be damaged when you rotate the drum motor.
Is the transfer belt motor rotating properly?
1. Check if the connector CN1 or CN2 of the transfer belt motor is disconnected.
2. Check if the connector J116 on the LGC board is disconnected.
3. Check if the connector J711 of the switching power supply is disconnected.
4. Check if the harness between the LGC board and the transfer belt motor is
open-circuited.
5. Check if the harness between the switching power supply and the transfer
belt motor is open-circuited.
6. Check for any open-circuited harness or for any disconnected connector pin.
7. Rotate the motor manually, clockwise as seen from its back, and if the motor
load is abnormal, adjust the load on the transfer belt unit. Remove any for-
eign matter from the drive unit.
8. Replace the LGC board.
9. Replace the transfer belt motor.
Is the pin 15 of connector J116 on the LGC board always at the level "L", and is the D5 of LED
on the LGC board lit?
1. Check if the connector CN2 of the transfer belt motor is disconnected.
2. Check if the connector J116 on the LGC board is disconnected.
3. Check the LGC board for any open- or short-circuited conductor pattern.
4. Check for any open-circuited harness and for any disconnected connector
pin.
5. Replace the LGC board.
6. Replace the transfer belt motor.
1. Check the LGC board for any open- or short-circuited conductor pattern.
2. Replace the LGC board.
3. Replace the transfer belt motor.
NO
YES
NO
YES