Sharp ARB351FT

• Code: E7-21
• Description: LSU laser deterioration error
• Causes: Reduced laser power, lighting error, laser diode trouble
  LSU connector, harness connection trouble
  LSU unit trouble
  MFPC PWB trouble
• Remedy: SIM61-1 to execute
  Check connection state of LSU connector, harness
  Replace LSU unit
  Replace MFPC PWB

• Code: E7-38
• Description: Quatro chip AD adjustment error
• Causes: The voltage on MFPC PWB is not stable
  The parts on the MFPC PWB are not soldered properly
• Remedy: Replace the MFPC PWB.

• Code: E7-80
• Description: Communication error between ICU and SCU
• Causes: MFPC PWB trouble
• Remedy: Check connection state of MFPC PWB connector, harness
  Replace MFPC PWB

• Code: E7-90
• Description: Communication error between ICU and PCU
• Causes: MFPC PWB trouble
• Remedy: Check connection state of MFPC PWB connector, harness
  Replace MFPC PWB

• Code: E7-91
• Description: Decode error (FAX received image data)
• Causes: Image compression data corruption
  MFPC PWB trouble
  FAX PWB trouble
• Remedy: SIM60-1 to execute
  Replace MFPC PWB
  Replace FAX PWB

• Code: E7-93
• Description: Decode error
• Causes: Image compression data corruption
  HDD trouble
  MFPC PWB trouble
• Remedy: SIM60-1 to execute
  Replace HDD
  Replace MFPC PWB