• Code: E7-50
• Description: Engine connection trouble
• Causes: A PWB/firmware/LSU which is not compatible with the machine specifications is detected. PCU PWB trouble LSU trouble
• Remedy: Check the kind and the version of the firmware. Check or replace the LSU. Check or replace the PCU PWB.

• Code: E7-55
• Description: PWB information sum error (engine detection)
• Causes: EEPROM device trouble. EEPROM device contact trouble. Device access error due to noises.
• Remedy: Replace the PWB.

• Code: E7-58
• Description: PWB information sum error (engine other detection)
• Causes: LSU connection failure PCU PWB trouble. LSU trouble.
• Remedy: Replace the LSU control PWB. Replace the PCU PWB. Replace the LSU.

• Code: E7-60
• Description: Combination error between PWB and firmware (MFPC PWB detection)
• Causes: A PWB/firmware which is not compatible with the machine specifications is detected in the MFPC PWB. MFPC PWB trouble.
• Remedy: Check the kind and the version of the firmware. Check or replace the MFPC PWB.

• Code: E7-61
• Description: Combination error between the MFPC PWB and the PCU PWB (MFPC PWB detection)
• Causes: Combination error between the MFPC PWB and the PCU PWB. MFPC PWB trouble. PCU PWB trouble.
• Remedy: Check the combination between the MFPC PWB and the PCU PWB. Replace the MFPC PWB. Replace the PCU PWB.

• Code: E7-62
• Description: Controller connection trouble (scanner)
• Causes: Combination error between the controller PWB and the engine.
• Remedy: Check the controller PWB. Check combination between the controller PWB and the scanner.

• Code: E7-65
• Description: MFP EEPROM sum check error
• Causes: EEPROM device trouble. EEPROM device contact trouble. Device access error due to noises.
• Remedy: Replace the PWB.

• Code: E7-70
• Description: Scanner connection trouble
• Causes: The PWB / firmware which is not supported by the machine specifications is connected. SCU PWB trouble. DSPF PWB trouble.
• Remedy: Check the firmware kind and the version. Check the SCU PWB. Check the DSPF PWB.