Code :

Code: E7-11
Description: Shading trouble (White correction)
Causes: CCD white reference plate scan level abnormality when the copy lamp is on.
Remedy: Case 1 Cause Installation error of the CCD unit flat cable Check and remedy Check the installing state of the flat cable to the CCD unit. Case 2 Cause Dirt on the mirror, the lens, or the reference white plate. Check and remedy Clean the mirror, the lens, or the reference white plate. Case 3 Cause Copy lamp lighting trouble Check and remedy Check the installing state of the flat cable to the copy lamp unit. Case 4 Cause CCD unit abnormality Check and remedy Check the CCD unit. Case 5 Cause SCU PWB abnormality Check and remedy Check the SCU PWB.

Code: E7-20
Description: LSU BD detection trouble
Causes: LSU BD signal is not detected.
Remedy: Case 1 Cause Disconnection or improper connection of harness and connector between LD/BD PWB and LSUcnt PWB Check and remedy Check connection of the harness of each PWB inside the LSU. Case 2 Cause 1) Optical axis shift 2) BK laser deterioration, power reduction 3) BD PWB trouble Check and remedy 1) Use SIM61-1 to check the LSU operation. 2) Replace the LSUcnt/BD PWB. 3) If the trouble cannot be removed by the above 1) to 2), replace the LSU.

Code: E7-21
Description: LSU LD deterioration trouble
Causes: The color laser does not light up normally.
Remedy: Case 1 Cause Disconnection or improper connection of harness and connector between LD PWB and LSUcnt PWB Check and remedy Check connection of the harness of each PWB inside the LSU. Case 2 Cause Y/M/C laser deterioration Check and remedy 1) Use SIM61-1 to check the LSU operation. 2) Replace the LSUcnt PWB. 3) If the trouble cannot be removed by the above 1) to 2), replace the LSU.

Code: E7-28
Description: LSU control ASIC connection abnormality
Causes: Access error between the CPU of the PCU PWB and the LSU control ASIC
Remedy: Case 1 Cause Communication connector connection trouble between the PCU PWB and the LSUcnt PWB (interface PWB), or harness trouble Check and remedy Check the connector connection between the PCU PWB and the LSUcnt PWB (interface PWB), or check the harness. Case 2 Cause PCU PWB or LSUcnt PWB (interface PWB) trouble Check and remedy Replace the PCU PWB or the LSUcnt PWB (interface PWB).

Code: E7-29
Description: LSU-ASIC frequency abnormality
Causes: Trouble of the oscillator on the LSU-ASIC PWB, the resistor and capacitor for the oscillation circuit, and the LSU-ASIC itself.
Remedy: Replace the LSUcnt PWB.

Code: E7-50
Description: Engine connection trouble
Causes: Unknown PWB identification information is detected in the PCU PWB.
Remedy: Case 1 Cause A PWB which is incompatible with the machine specifications is connected. Check and remedy 1) Replace the PCU PWB. 2) Replace the LSU PWB. Case 2 Cause A firmware which is incompatible with the machine specifications is used. Check and remedy Check the kind and the version of the firmware. Case 3 Cause LSU PWB connection trouble Check and remedy Check the LSU PWB connection. Case 4 Cause LSU PWB trouble Check and remedy Replace the LSU PWB.

Code: E7-60
Description: Controller connection trouble (Engine detection)
Causes: Unknown PWB kind information is detected in the MFPcnt PWB.
Remedy: Case 1 Cause A PWB which is not compatible with the machine specifications is connected. Check and remedy Replace the controller PWB. Case 2 Cause A firmware which is not compatible with the machine specifications is applied. Check and remedy Check the kind and the version of the firmware.