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: C0124
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. Defective drum PWB Y.
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 yellow process unit.
Code: C0130
Description: Backup memory (EEPROM) device problem
Causes: Defective scanner main PWB. Device damage of EEPROM.
Remedy: Defective scanner main PWB. Replace the scanner main PWB and check for correct operation. Device damage of EEPROM. Contact the Service Administrative Division.
Code: C0140
Description: Backup memory (EEPROM) data problem
Causes: Data damage of EEPROM.
Remedy: Data damage of EEPROM. Contact the Service Administrative Division.
Code: C0150
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. Data damage of EEPROM.
Remedy: Defective engine controller PWB. Replace the engine controller PWB. Data damage of EEPROM. Contact the Service Administrative Division.
Code: C0160
Description: Backup memory data problem (Engine controller PWB) • Data for backup data check is changed at the check after startup.
Causes: Problem with the backup memory data.
Remedy: Problem with the backup memory data. Run maintenance item U020 to initialize the backup memory data.