Description: IMC communication interface error (Framing) A framing error occurs in communication between the CPU and the IMC.
Causes: IMC memory defect/data abnormality.
Remedy: Check the memory of the IMC.
Code: E7-02
Description: LSU trouble The BD signal from the LSU cannot be detected in a certain cycle. (Always OFF or always ON)
Causes: LSU connector or LSU harness defect or disconnection Polygon motor rotation abnormality Laser beams are not generated. MCU PWB abnormality.
Remedy: Check connection of the LSU connector. Execute TC 61-03 to check the LSU operations. Check that the polygon motor rotates normally. Check that the laser emitting diode generates laser beams. Replace the LSU unit. Replace the MCU PWB.
Code: E7-10
Description: Shading trouble (Black correction) The CCD black scan level is abnormal when the shading.
Causes: Improper connection of the CCD unit flat cable CCD unit abnormality MCU PWB abnormality
Remedy: Check connection of the CCD unit flat cable. Check the CCD unit.
Code: E7-11
Description: Shading trouble (White correction) The CCD white scan level is abnormal when the shading.
Causes: Improper connection of the CCD unit flat cable Dirt on the mirror, the lens, and the reference white plate Copy lamp lighting abnormality CCD unit abnormality MCU PWB abnormality (When occurred in the SPF scan position.) Improper installation of the mirror unit
Remedy: Clean the mirror, lens, and the reference white plate. Check the light quantity and lighting status of the copy lamp (TC 05-03). Check the MCU PWB.
Code: E7-16
Description: Abnormal laser output When the laser output is stopped, HSYNC is detected.
Causes: Laser abnormality MCU PWB abnormality.
Remedy: Check the laser emitting diode operation. Replace the MCU PWB.
Code: F2-04
Description: Improper cartridge (Destination error, life cycle error) The destination of the main unit differs from that of the CRUM. The life cycle information is other than "FFh" (Not used).
Causes: CRUM chip trouble Improper developing unit
Remedy: Replace the CRUM chip. Replace the developing unit.