Missing Parts Of Images; Dirty Background; Partial Cmy Color Dots - Ricoh G190 Service Manual

4.3.8 MISSING PARTS OF IMAGES

Symptom
Some parts of images are
missing.

4.3.9 DIRTY BACKGROUND

Symptom
Backgrounds of one CMYK
color are too dense.
Backgrounds of more than
one CMYK are too
dense.color

4.3.10 PARTIAL CMY COLOR DOTS

Symptom
Unexpected dots of the
same color appear at
irregular intervals.
SM
Possible cause
Defective PCU
Defective transfer belt unit
Defective transfer roller
Defective fusing unit
Possible cause
Defective PCU
Defective high voltage
supply board
Possible cause
Defective PCU
Defective transfer belt unit
Defective fusing unit
4-49
Troubleshooting Guide
Necessary actions
Replace the PCU.
Replace the transfer belt
unit.
Replace the transfer roller.
Replace the fusing unit.
Necessary actions
Replace the PCU.
Replace the high voltage
supply board (1 or 2).
Necessary actions
Replace the PCU.
Replace the transfer belt
unit.
Replace the fusing unit.
G190