Duplex Unit
Duplex jam
Description: The trailing edge sensor failed to detect the trailing edge of the paper after it was fed to the
duplex unit for duplex/inverted printing.
Probable Cause: Duplex unit defective
Location: Duplex unit
Service Center Procedure:
1. Confirm that the duplex unit is installed correctly and that both levers are locked.
2. Confirm that the paper type can be used for duplex printing.
3. Request delivery of a new duplex unit if the unit is in poor condition.
Replacement Procedure:
1. Confirm that duplex unit is set correctly.
2. Remove jammed paper, paper scraps, etc.
3. Replace duplex unit.
Duplex transport jam
Description: After the trailing edge sensor detected the trailing edge of the paper fed to the duplex unit for
duplex/inverted printing, the paper stopped at the trailing edge sensor.
Probable Cause: The signal of the trailing edge sensor did not change, or the feeler of the trailing edge
sensor did not return to its home position properly.
Location: Trailing edge sensor
Service Center Procedure:
1. Confirm that the duplex unit is installed correctly and that both levers are locked.
2. Confirm that the paper type can be used for duplex printing.
Replacement Procedure:
1. Replace inverter guide.
2. Replace trailing edge sensor.
3. Replace control board.
Unrecoverable Jamming
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