• Code: E7-29
• Description: LSU-ASIC frequency abnormality
  Oscillation trouble of the external oscillator used in LSU-ASIC and the internal oscillation circuit
• Causes: Trouble of the oscillator on the LSU-ASIC PWB, the resistor and capacitor for the oscillation circuit, and the LSU-ASIC itself.
• Remedy: Replace the LSUcnt PWB.

• Code: E7-50
• Description: Engine connection trouble
  Unknown PWB identification information is detected in the PCU PWB.
• Causes: A PWB which is incompatible with the machine specifications is connected. A firmware which is incompatible with the machine specifications is used.
• Remedy: Case 1 Cause A PWB which is incompatible with the machine specifications is connected. Check and remedy 1) Replace the PCU PWB. 2) Replace the LSU PWB. Case 2 Cause A firmware which is incompatible with the machine specifications is used. Check and remedy Check the kind and the version of the firmware.

• 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.