Description: Zero-cross signal error The zero-cross signal does not reach the engine PWB for more than 2 s.
Causes: Defective connector cable or poor contact in the connector. Defective power source PWB. Defective engine PWB.
Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Power source PWB (YC103) and connect-L PWB (YC1) Connect-L PWB (YC8) and engine PWB (YC503) Defective power source PWB. Replace the power source PWB and check for correct operation. Defective engine PWB. Replace the engine PWB and check for correct operation.
Code: 7000
Description: Toner motor lock error During driving the toner motor, a motor overcurrent signal is detected for 5 s.
Causes: Lump of toner inside toner container. Defective drive transmission system of the toner motor. Defective toner motor. Defective engine PWB.
Remedy: Lump of toner inside toner container. Replace the toner container. Defective drive transmission system of the toner motor. Replace the developing unit. Defective toner motor. Replace the developing unit. Defective engine PWB. Replace the engine PWB and check for correct operation.
Code: 7410
Description: Drum unit non- installing error The drum unit is not installed or not installed properly. The drum PWB EEPROM does not communicate normally.
Causes: The drum unit is not installed. Defective connector cable or poor contact in the connector. Defective drum PWB EEPROM. Defective engine PWB.
Remedy: The drum unit is not installed. Install the drum unit. Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. Drum PWB (YC1) and connect-L PWB (YC3) Defective drum PWB EEPROM. Replace the drum unit. Defective engine PWB. Replace the engine PWB and check for correct operation.
Code: 9500
Description: BRU communication error
Causes: IPU PWB error
Remedy: Contact the Service Administrative Division.
Code: 9510
Description: BRU PWB error
Causes: IPU PWB error
Remedy: Contact the Service Administrative Division.
Code: 9520
Description: BRU PWB data error
Causes: IPU PWB error
Remedy: Contact the Service Administrative Division.