• Code: E7-24
• Description: LSU LD driver trouble
  The LSU LD is lighted, the initialization process of the LD driver is not performed normally.
• Causes: Disconnection or improper connection of the harness and the connector between the LD PWB and the LSU control PWB. LD PWB/LSU control PWB trouble.
• Remedy: Use SIM61-01 to check the operations of the LSU. Check the harness and the connector between the LD PWB and the LSU control PWB. Replace the LD PWB/LSU control PWB.

• Code: E7-28
• Description: LSU - PCU connection error
• Causes: Communication error between the CPU in the PCU PWB and the LSU control ASIC. Improper connection of the communication connector between the PCU PWB and the LSU control PWB (interface PWB). Harness trouble between the PCU PWB and the LSU control PWB (interface PWB) PCU PWB trouble. LSU control PWB trouble. LSU trouble.
• Remedy: Check connection of the connector and the harness between the PCU PWB and the LSU control PWB. Replace the LSU control PWB. Replace the PCU PWB. Replace the LSU.

• Code: E7-29
• Description: LSU ASIC frequency error
• Causes: Oscillation abnormality of the external oscillator used in the LSU ASIC. LSU ASIC abnormality on the LSU control PWB.
• Remedy: Replace the LSU control PWB.

• Code: E7-35
• Description: Communication trouble with the CIS-ASIC
  Communication trouble (clock synchronization) between the CPU and the CIS-ASIC in the PCU PWB
• Causes: Connector/harness trouble between the PCU PWB and the PEDCis PWB. PEDCis PWB trouble, PCU PWB trouble. PS unit drawer connector insertion trouble.
• Remedy: Check the harness between the PCU PWB and the PEDCis PWB. Check the PEDCis PWB, and the PCU PWB. If the trouble is not canceled, replace the PEDCis PWB and the PCU PWB.

• Code: E7-36
• Description: CIS-ASIC black level detection abnormality.
  The black reference plate scan level when the lamp is lighted is abnormal.
• Causes: The CIS unit is not installed properly. Harness trouble between the CIS unit and the PEDCis PWB. CIS unit trouble, PEDCis PWB trouble. Dirt on the reference black plate.
• Remedy: Check the installing state of the CIS unit Check the harness between the CIS unit and the PEDCis PWB. Clean the reference black plate. If the trouble is not canceled, replace the CIS unit and the PEDCis PWB.

• Code: E7-37
• Description: CIS-ASIC white level detection abnormality.
  The white reference plate scan level when the lamp is lighted is abnormal.
• Causes: The CIS unit is not installed properly. Harness trouble between the CIS unit and the PEDCis PWB. CIS unit trouble, PEDCis PWB trouble. Dirt on the reference white plate.
• Remedy: Check the installing state of the CIS unit Check the harness between the CIS unit and the PEDCis PWB. Clean the reference white plate. If the trouble is not canceled, replace the CIS unit and the PEDCis PWB.

• Code: E7-42
• Description: Image data trouble (Scanner expansion PWB (ACRE) ASIC)
• Causes: An image data error occurs. An image data send error occurs. Scanner expansion PWB (ACRE) connection trouble. Scanner expansion PWB (ACRE) trouble. MFPC PWB trouble.
• Remedy: Check connection of the scanner expansion PWB (ACRE). Check the scanner expansion PWB (ACRE), and replace if necessary. Check the MFPC PWB, and replace if necessary.

• Code: E7-46
• Description: Image data decode error (Scanner expansion PWB (ACRE) ASIC)
• Causes: A decode error occurs while high compression PDF images are made. (garbled data) Scanner expansion PWB (ACRE) connection trouble. Scanner expansion PWB (ACRE) trouble. MFPC PWB trouble.
• Remedy: Check connection of the scanner expansion PWB (ACRE). Check the scanner expansion PWB (ACRE), and replace if necessary. Check the MFPC PWB, and replace if necessary.