Countermeasures; Symptom; Sm G108; White Band - Ricoh G108 Service Manual

4.2.13 WHITE BAND

Symptom

A horizontal white band appears, creating a
"mist" like image.
Possible Cause
1) Deformation of the transfer roller.
2) Contact failure of the transfer roller's
bias terminal.
3) Failure of the paper transfer clutch.

Countermeasures

1) Replace the transfer roller unit.
2) Check the transfer roller's bias
terminal.
3) Check the paper transfer clutch and
cam structure.
4.2.14 TONER SPOTS
Symptom
As a result of toner dropping inside the
printer engine, irregular dot images appear.
Possible Cause
1) Toner falls on the transfer belt
because of a waste toner auger
failure.
a) The mylar of the waste toner
auger is damaged.
b) The waste toner is not correctly
collected by the waste toner
auger.
2) The toner adhering to the development roller falls onto the OPC belt.
Countermeasures
1) Check the cleaning brush and the waste toner path.
a) Clean the perimeter of the transfer-belt cleaning unit.
b) Check the seal on the transfer-belt cleaning unit. Replace the transfer-
belt cleaning unit if necessary.
c) Check the waste toner path. If waste toner stays, remove it with a
vacuum cleaner.
2) Clean or replace the development unit.
SM 4-15
IMAGE QUALITY
G108T913.TIF
G108T914.TIF
G108