• Code: E7-55
• Description: PWB information sum error (Engine detection)
  EEPROM PWB information sum error
• Causes: 1) EEPROM device error 2) EEPROM device contact failure 3) Device access error due to noises
• Remedy: Replace the PCU PWB.

• Code: E7-60
• Description: Controller connection trouble (Engine detection)
  Unknown PWB kind information is detected in the MFPcnt PWB. A PWB/firmware which is not compatible with the machine specifications is connected.
• Causes: Controller PWB trouble A firmware which is not compatible with the machine specifications is applied.
• Remedy: Case 1 Cause Controller PWB trouble Check and remedy Replace the controller PWB. Case 2 Cause A firmware which is not compatible with the machine specifications is applied. Check and remedy Check the kind and the version of the firmware.

• Code: E7-61
• Description: Controller connection trouble (Engine)
  MFPcnt PWB connection trouble Compatibility trouble between the controller and the engine
• Causes: Combination trouble of the controller PWB and the engine
• Remedy: Check the controller PWB. Check the combination between the controller PWB and the engine.

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

• Code: E7-65
• Description: PWB information sum error (Controller detection)
  EEPROM PWB information sum error
• Causes: 1) EEPROM device trouble 2) EEPROM device contact failure 3) Device access error due to noises
• Remedy: Replace the MFPcnt PWB.

• Code: E7-70
• Description: Scanner connection trouble
  Unknown identification information is detected in the SCU PWB.
• Causes: SCU PWB trouble A firmware which is incompatible with the machine
  specifications is connected.
• Remedy: Case 1 Cause SCU PWB trouble Check and remedy Replace the SCU PWB. Case 2 Cause A firmware which is incompatible with the machine specifications is connected. Check and remedy Check the kind and the version of the firmware.

• Code: E7-75
• Description: PWB information sum error (Scanner detection)
  EEPROM PWB information sum error
• Causes: 1) EEPROM device trouble 2) EEPROM device contact failure 3) Device access error due to noises
• Remedy: Replace the scanner control PWB.

• Code: E7-80
• Description: Communication trouble between the controller and the scanner
  Communication trouble between the MFP and the scanner MFP detection Communication establishment error/Framing/Parity/ Protocol error
• Causes: SCU PWB connector connection trouble Harness trouble between the SCU PWB and the MFPcnt PWB Broken connector pin of the SCU PWB mother board
• Remedy: Case 1 Cause SCU PWB connector connection trouble Check and remedy Check the connector connection between the SCU PWB and the MFPcnt PWB. Case 2 Cause Harness trouble between the SCU PWB and the MFPcnt PWB Check and remedy Check the harness between the SCU PWB and the MFPcnt PWB. Case 3 Cause Broken connector pin of the SCU PWB mother board Check and remedy Check grounding of the machine.