Jitter - Ricoh G108 Service Manual

4.2.3 JITTER

Symptom
Uneven image density appears periodically
perpendicular to the feed direction and
horizontal lines appear.
Possible Cause
1) Failure of the main motor.
a) Irregular rotation of the main
motor.
b) Failure in the OPC belt drive path.
c) Changes of OPC belt run speed
due to above reasons.
2) Failure of the OPC belt unit.
3) Failure of the gearbox.
4) Failure in the development unit drive
path.
Countermeasures
1) Replace the gears on the OPC belt drive path.
2) Replace the OPC belt unit.
3) Replace the gearbox.
4) Replace the gears in the development unit drive path.
SM 4-9
IMAGE QUALITY
G108T903.TIF
G108