Description: E-Sort PWB communication trouble (Time-out)
Communication trouble between MCU and E-Sort PWB (Time-out error)
Causes: E-Sort PWB connector disconnection E-Sort PWB and MCU PWB harness failure E-Sort Motherboard connector pin breakage. E-Sort PWB ROM defect, data failure
Code: E7-03
Description: LSU trouble
After the polygon motor becomes active, BD signal (HSYNC) from the LSU is not detected at the specified times (41 +- 10 times within 20msec).
Causes: LSU connector disconnection or LSU’s inside harness disconnection or breakage Polygon motor rotation abnormality Improper positioning of the laser home position sensor in the LSU. Laser power voltage failure Laser emitting diode abnormality MCU PWB abnormality
Code: E7-04
Description: CCD white level trouble
CCD white reference level which is read during the copy lamp lighting is abnormal.
Causes: Flat cable installation failure to CCD unit Dirt on the mirror, lens, and reference white plate Copy lamp lighting failure CCD unit installation failure CCD unit abnormality MCU PWB abnormality
Code: E7-05
Description: CCD black level trouble
CCD black level which is read while the copy lamp is off is abnormal.
Description: Shifter motor trouble
The home position is not detected within 1 sec after shifter motor drive.
Causes: The shifter home position sensor is defective. The shifter motor is defective. The shifter motor periphery circuit is defective. The condition of the MCU PWB JP4 is wrong. The assembly of the shifter motor unit is improper.