• Code: E7-23
• Description: LSU laser deterioration error (Y)
• Causes: Reduced laser power, lighting error, laser diode trouble. LSU harness, connector trouble LD board, LSUcnt board trouble
• Remedy: Use SIM61-1 to check the operation of the LSU. Check or replace the LSU control PWB. Check connection of the LSU harness and connector. Replace the LSU.

• Code: E7-24
• Description: LSU LD driver trouble (K). The LSU LD is lighted, the initialization process of the LD driver is not performed normally.
• Causes: Reduced laser power, lighting error, laser diode trouble. LSU connector trouble. LD PWB/LSU control PWB trouble
• Remedy: Use SIM61-01 to check the operations of the LSU. Check or replace the LSU control PWB. Check connection of the LSU harness. Replace the LSU.

• Code: E7-25
• Description: LSU LD driver trouble (C). The LSU LD is lighted, the initialization process of the LD driver is not performed normally.
• Causes: Reduced laser power, lighting error, laser diode trouble. LSU connector trouble. LD PWB/LSU control PWB trouble.
• Remedy: Use SIM61-01 to check the operations of the LSU. Check or replace the LSU control PWB. Check connection of the LSU harness. Replace the LSU.

• Code: E7-26
• Description: LSU LD driver trouble (M). The LSU LD is lighted, the initialization process of the LD driver is not performed normally.
• Causes: Reduced laser power, lighting error, laser diode trouble. LSU connector trouble. LD PWB/LSU control PWB trouble.
• Remedy: Use SIM61-01 to check the operations of the LSU. Check or replace the LSU control PWB. Check connection of the LSU harness. Replace the LSU.

• Code: E7-27
• Description: LSU LD driver trouble (Y). The LSU LD is lighted, the initialization process of the LD driver is not performed normally.
• Causes: Reduced laser power, lighting error, laser diode trouble. LSU connector trouble. 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 and the 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: E7-42
• Description: Image data trouble (ACRE ASIC)
• Causes: An image data error occurs. An image data send error occurs. ACRE ASIC trouble. MFPC PWB trouble.
• Remedy: Check the MFPC PWB, and replace if necessary.