Konica Minolta bizhub 20 Service Manual page 124

<Location of the leser beam window>
■ Faulty registration
Step Cause
Registration rear
1 actuator catching
on some position
Drum unit failure
2
Fig. 3-6
<User Check>
- Check that the appropriate media type is selected in the
printer driver.
Check
Does the registration
rear actuator move
smoothly?
Is the rotation torque of
the drum unit heavy?
3-49
Result Remedy
Re-assemble the
No registration rear actuator.
Replace the drum unit.
Yes
Confidential