• Code: E7-60
• Description: Controller connection trouble
  Incompatibility trouble between the controller and the engine
• Causes: Improper combination of the controller PWB and the engine
• Remedy: Check the MFP controller PWB.

• Code: E7-65
• Description: Incompatibility check (55ppm) (MFP controller detection)
  An error is detected in the internal incompatibility check in the MFP control PWB.
• Causes: MFP control PWB trouble
• Remedy: Check the MFP control PWB

• Code: E7-66
• Description: Incompatibility check (62ppm) (MFP controller detection
  An error is detected in the internal incompatibility check in the MFP control PWB.
• Causes: MFP control PWB trouble
• Remedy: Check the MFP control PWB

• Code: E7-67
• Description: Incompatibility check (70ppm) (MFP controller detection)
  An error is detected in the internal incompatibility check in the MFP control PWB.
• Causes: MFP control PWB trouble
• Remedy: Check the MFP control PWB

• Code: E7-80
• Description: Communication trouble between the MFP control and the scanner (MFP control detection)
  Communication establishment error/ framing/ parity/ protocol error. Follows the communication protocol specifications. Communication error, timing abnormality of the communication data and the communication signal line.
• Causes: Defective connection of the slave unit PWB connector. Defective harness between the slave unit PWB and the MFP control PWB. Slave unit PWB mother board connector pin breakage.
• Remedy: Check connection of the connector between the slave unit PWB and the MFP control PWB and the harness. Check grounding of the machine.

• Code: E7-90
• Description: MFP control-PCU communication trouble (MFP control detection)
  Communication establishment error/ framing/ parity/ protocol error Follows the communication protocol specifications. Communication error, timing abnormality of the communication data and the communication signal line
• Causes: Defective connection of the slave unit PWB connector. Defective harness between the slave unit PWB and the MFP control PWB. Slave unit PWB mother board connector pin breakage.
• Remedy: Check connection of the connector between the slave unit PWB and the MFP control PWB and the harness. Check grounding of the machine.

• Code: EE-EL
• Description: Auto developer adjustment trouble (Overtoner error)
  Described on the toner density control design sppecifications and the change request. When the average of 10 output values of the toner sensor (sampling data) after completion (3 min) of the auto development adjustment is smaller than 1.5V.
• Causes: Toner density sensor trouble. Charging voltage and developing voltage trouble. Toner density trouble Developing unit trouble PCU PWB trouble.
• Remedy: Use SIM 25-2 to perform the automatic developing adjustment.

• Code: EE-EU
• Description: Auto developer adjustment trouble (Undertoner error)
  Described on the toner density control design specifications and the change request. When the average of 10 output values of the toner sensor (sampling data) after completion (3 min) of the auto development adjustment is smaller than 3.5V.
• Causes: Toner density sensor trouble Charging voltage and developing voltage trouble Toner density trouble Developing unit trouble PCU PWB trouble
• Remedy: Use SIM 25-2 to perform the automatic developing adjustment.