Incorrect Color Registration - Ricoh G108 Service Manual

4.2.17 INCORRECT COLOR REGISTRATION

Symptom
Incorrect color registration is seen between
two colors.
Possible Cause
1) OPC belt error.
2) The OPC belt fails to maintain the
correct rotation because of the
impact caused when the toner
cartridge contacts the OPC belt.
3) Transfer belt error.
4) The transfer belt fails to maintain the
correct rotation because of the
impact caused when the transfer
roller contacts the paper against the
transfer belt.
Countermeasures
1) Check that the transfer roller unit is correctly installed.
2) Check that the transfer-belt cleaning unit is correctly installed.
3) Replace the OPC belt unit.
4) Replace the transfer belt unit.
4.2.18 MOTTLING
Symptom
The image density varies.
Possible Cause
1) The rear cover is not in place.
2) The transfer roller is incorrectly
installed.
3) The THV output of the high voltage
supply unit is not correct.
4) Failure in the development unit.
5) Damaged or poor quality print paper.
Countermeasures
1) Check that the rear cover is correctly locked.
2) Replace the papers with new papers.
3) Replace the development unit.
4) Check that the transfer roller unit is correctly installed.
5) Replace the high voltage unit.
SM 4-17
IMAGE QUALITY
G108T917.TIF
G108T918.TIF
G108