Causes: When the power is turned on, conformity of the PCU PWB and the PCU ROM is checked to be found that there is no conformity.
Remedy: Case 1 Cause PCU PWB trouble Check & Remedy Replace the PCU PWB. Case 2 Cause PCU PWB mistaken Check & Remedy Replace the PCU PWB.
Code: C2 10
Description: Transfer charger trouble (Black)
Causes: The difference between the belt surface output and the K-color patch density output does not reach the specified level. (Judged when installing a new developing unit.)
Remedy: Case 1 Cause TC-K output abnormality Check & Remedy TC-K analog input/output abnormality. Replace the TC PWB. Case 2 Cause MC output abnormality Check & Remedy Replace the MC PWB. Case 3 Cause Transfer unit trouble Check & Remedy Replace the transfer unit. Case 4 Cause PCU PWB trouble Check & Remedy Replace the PCU PWB. Case 5 Cause Connector, harness trouble (PCU PWB, TC PWB, MC PWB, transfer unit) Check & Remedy Check contact. Replace the harness. Replace the PWB.
Code: E7 01
Description: Image data memory trouble
Causes: The ICU image data memory (SDRAM) cannot be detected as 256MB or more. The required SDRAM capacity for the model is not provided.
Remedy: Case 1 Cause The SDRAM of ICU PWB is not installed. The SDRAM of ICU PWB is improperly installed. Check & Remedy Check installation of the SDRAM of ICU ASIC PWB. Case 2 Cause The SDRAM of ICU PWB does not operate properly. Check & Remedy Use SIM 22-10 to check the capacity of the SDRAM. Replace the SDRAM of ICU PWB. Case 3 Cause ICU PWB abnormality Check & Remedy Replace the ICU PWB.
Code: E7 07
Description: ICU gate array trouble
Causes: An abnormality occurs in the ICU gate array.
Remedy: Case 1 Cause ICU PWB abnormality Check & Remedy Replace the ICU PWB. Case 2 Cause Gate array (ASIC, FPGA) abnormality on the ICU PWB. Check & Remedy Replace the gate array on the ICU PWB.
Code: E7 10
Description: Shading trouble (Black correction)
Causes: CCD black reading level abnormality when the copy lamp is off.
Remedy: Case 1 Cause Improper installation of the flat cable to the CCD unit. Check & Remedy Check installation of the flat cable to the CCD unit. Case 2 Cause CCD unit abnormality Check & Remedy Check the CCD unit. Case 3 Cause MFP PWB abnormality Check & Remedy Check the MFP PWB.
Code: E7 11
Description: Shading trouble (White correction)
Causes: CCD white reading level abnormality when the copy lamp is on.
Remedy: Case 1 Cause Improper installation of the flat cable to the CCD unit. Check & Remedy Check installation of the flat cable to the CCD unit. Case 2 Cause Dirt on the mirror, the lens, or the reference white plate. Check & Remedy Clean the mirror, the lens, or the reference white plate. Case 3 Cause CCD unit abnormality Check & Remedy Check the CCD unit. Case 4 Cause MFP PWB abnormality Check & Remedy Check the MFP PWB.