• 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.

• Code: E7-90
• Description: Communication trouble between the controller and the engine
  Communication trouble between the MFP and the PCU (MFP detection) Communication establishment error/Framing/Parity/ Protocol error
• Causes: PCU PWB connector connection trouble Harness trouble between the PCU PWB and the
  MFPcnt PWB Broken connector pin of the PCU PWB mother board
• Remedy: Case 1 Cause PCU PWB connector connection trouble Check and remedy Check the connector connection between the PCU PWB and the MFPcnt PWB. Case 2 Cause Harness trouble between the PCU PWB and the MFPcnt PWB Check and remedy Check the harness between the PCU PWB and the MFPcnt PWB. Case 3 Cause Broken connector pin of the PCU PWB mother board Check and remedy Check grounding of the machine.

• Code: EE-EC
• Description: Auto developer adjustment trouble (The sample level for every rotation is other than 128)
  Auto developer adjustment trouble (The sample level for every rotation is other than 128.) <Detection only with SIM25-2, no trouble memory, only display>
• Causes: Toner density sensor trouble, charging voltage/ developing voltage trouble, toner density trouble, developing unit trouble, PCU PWB trouble
• Remedy: Use SIM25-2 to execute the auto development adjustment.

• Code: EE-EL
• Description: Auto developer adjustment trouble (overtoner error)
  The sample level is 76 or below, or the control voltage is 208V or above. <Detection only with SIM25-2, no trouble memory, only display>
• Causes: Toner density sensor trouble, charging voltage/ developing voltage trouble, toner density trouble, developing unit trouble, PCU PWB trouble
• Remedy: Use SIM25-2 to execute the auto development adjustment.

• Code: EE-EU
• Description: Auto development adjustment trouble (Under-toner abnormality)
  The sample level is 178 or above, or the control voltage is 51V or below. <Detection only with SIM25- 2, no trouble memory, only display>
• Causes: Toner density sensor trouble, charging voltage/ developing voltage trouble, toner density trouble, developing unit trouble, PCU PWB trouble
• Remedy: Use SIM25-2 to execute the auto development adjustment.

• Code: F1-00
• Description: Finisher communication trouble (Machine side detection)
  Communication line test error when turning on the power or after canceling an exclusion simulation. Communication error with the finisher
• Causes: Malfunction due to noises PCU finisher connector or harness connection error or disconnection Finisher control PWB trouble Control PWB (PCU) trouble
• Remedy: Case 1 Cause Malfunction due to noises Check and remedy Turn OFF/ON the power to cancel. Case 2 Cause PCU finisher connector or harness connection error or disconnection Check and remedy Check the connector and harness in the communication line. Case 3 Cause Finisher control PWB trouble Check and remedy Replace the finisher control PWB. Case 4 Cause Control PWB (PCU) trouble Check and remedy Replace the PCU PWB.

• Code: F1-02
• Description: Saddle finisher transport motor trouble
  Transport drive motor trouble
• Causes: Motor lock, motor RPM abnormality, motor overvoltage, saddle finisher control PWB trouble
• Remedy: Use SIM3-3 to check the operation of the transport motor (FFM). Replace the finisher control PWB.