• Code: E7-01
• Description: Duplex model memory error
  The memory capacity for the duplex model machine is improper. Insufficient memory capacity.
• Causes: The memory capacity of the MCU PWB is improper.
• Remedy: Use SIM 26-39 to check that the memory capacity is 32MB. If it is not 32MB, replace the MCU PWB with a suitable one.

• Code: E7-02
• Description: LSU trouble
  The BD signal from the LSU cannot be detected in a certain cycle. (Always OFF or always ON)
• Causes: LSU connector or LSU harness defect or disconnection.
  Polygon motor rotation abnormality.
  Laser beams are not generated.
  MCU PWB abnormality.
• Remedy: Check connection of the LSU connector. Execute SIM 61-03 to check the LSU operations. Check that the polygon motor rotates normally. Check that the laser emitting diode generates laser beams. Replace the LSU unit. Replace the MCU PWB.

• Code: E7-10
• Description: Shading trouble (Black correction)
  The CCD black scan level is abnormal when the shading
• Causes: Improper connection of the CCD unit flat cable
  CCD unit abnormality.
  MCU PWB abnormality.
• Remedy: Check connection of the CCD unit flat cable. Check the CCD unit.

• Code: E7-11
• Description: Shading trouble (White correction)
  The CCD white scan level is abnormal when the shading.
• Causes: Improper connection of the CCD unit flat cable
  Dirt on the mirror, the lens, and the reference white plate.
  Copy lamp lighting abnormality.
  CCD unit abnormality.
  MCU PWB abnormality(When occurred in the SPF scan position).
  Improper installation of the mirror unit.
• Remedy: Clean the mirror, lens, and the reference white plate. Check the light quantity and lighting status of the copy lamp (SIM 05-03). Check the MCU PWB.

• Code: E7-12
• Description: Shading trouble
  White correction is not completed in the specified number of operations.
• Causes: CCD unit flat cable connection failure.
  Dirt on mirrors, lenses, and the reference white plate.
  Copy lamp lighting abnormality.
  CCD unit abnormality.
  MCU PWB abnormality .
• Remedy: Clean mirrors, lenses, and the reference white plate. Check the copy lamp light quantity (SIM 05-03) and lighting. Check the CCD unit. Check the MCU PWB.

• Code: E7-16
• Description: Abnormal laser output
  When the laser output is stopped, HSYNC is detected.
• Causes: Laser abnormality.
  MCU PWB abnormality.
• Remedy: Check the laser emitting diode operation. Replace the MCU PWB.

• Code: F2-02
• Description: Toner supply abnormality
  When toner near end is detected with the toner supply time of 50% or less When the toner supply time exceeds 300%..
• Causes: ATC sensor abnormality
  Toner supply abnormality
• Remedy: Replace the toner cartridge. Replace the developing unit.

• Code: F2-04
• Description: Improper cartridge (destination error, life cycle error)
  The destination of the machine differs from that of the CRUM. The life cycle information is other than "Not used (FFh)".
• Causes: CRUM chip defect.
  Improper developing unit .
• Remedy: Check and remedy Replace the CRUM chip. Replace the developing unit. Identification error The trade mark code of the CRUM differs. The company code of the CRUM differs. Model error The boot program model code does not coincide with the CRUM model code. Type error When the CRUM type is other than genuine/conversion/production rotation. Destination error The machine destination differs from the CRUM destination. Data abnormality When an error value is included in the initial check information. When the max. toner supply time is 00. When the print hard stop is 00. Misc error When the Misc information is other than "Not used (FFh)".