Description: EEPROM read error (drum PWB K) • When data is transmitted to the EEPROM on drum PWB K, the ACK signal is not returned within 1 s.
Causes: Poor contact in the connector terminals.
Remedy: Poor contact in the connector terminals. Check the connection of connector YC9 on the engine controller PWB and the continuity across the connector terminals. Repair or replace if necessary. Defective drum PWB K. Replace the black process unit.
Code: 0122
Description: EEPROM read error (drum PWB C) • When data is transmitted to the EEPROM on drum PWB C, the ACK signal is not returned within 1 s.
Causes: Poor contact in the connector terminals.
Remedy: Poor contact in the connector terminals. Check the connection of connector YC10 on the engine controller PWB and the continuity across the connector terminals. Repair or replace if necessary. Defective drum PWB C. Replace the cyan process unit.
Code: 0123
Description: EEPROM read error (drum PWB M) • When data is transmitted to the EEPROM on drum PWB M, the ACK signal is not returned within 1 s.
Causes: Poor contact in the connector terminals. Defective drum PWB M.
Remedy: Poor contact in the connector terminals. Check the connection of connector YC11 on the engine controller PWB and the continuity across the connector terminals. Repair or replace if necessary. Defective drum PWB M. Replace the magenta process unit.
Code: 0124
Description: EEPROM read error (drum PWB Y) • When data is transmitted to the EEPROM on drum PWB Y, the ACK signal is not returned within 1 s.
Causes: Poor contact in the connector terminals.
Remedy: Poor contact in the connector terminals. Check the connection of connector YC12 on the engine controller PWB and the continuity across the connector terminals. Repair or replace if necessary. Defective drum PWB Y. Replace the black process unit.
Code: 0150
Description: Backup memory device problem (Engine controller PWB) • An error occurs in backup data read or write for the engine controller PWB. • An error occurs in control area deletion.
Causes: Defective engine controller PWB.
Remedy: Defective engine controller PWB. Replace the engine controller PWB.
Code: 0160
Description: Backup memory data problem (Engine controller PWB) • Data for backup data check is changed at the check after startup.
Causes: Defective engine controller PWB.
Remedy: Defective engine controller PWB. Replace the engine controller PWB.