MINOLTA-QMS magicolor 6100 Series Service Manual page 388

8.5.3 Jitter
8.5.3.1
8.5.3.2
8.5.3.3
Page 1-74
Phenomenon
Uneven optical density appears periodically in the horizontal direction of
printed image as shown in the print sample at the upper-right corner.
Main Causes
1. Failure of the main motor.
a. Erratic rotation of the drive motor.
b. Defective drive gear.
c. OPC belt running at irregular speeds due to above reasons.
2. Failure of the OPC belt.
Fig. 8-66
Countermeasures
1. Replace the Main Gear Unit with a new unit (see section 7.3.2).
2. Replace the OPC belt cartridge with a new cartridge (see section
3.3.2).
Fig. 8-65
Main Gear Unit
magicolor 6100 Series Service Manual
April 2001