Ricoh MP C6502SP Field Service Manual page 1410

5. Troubleshooting
D137/D138 only
37
38
• Transfer capability and image density may worse.
• Residual image in black halftone may appear.
Image Quality 003: Bands
Troubleshooting for Blurred Image in 189mm Pitch (OPC Drum Circumference)
Symptom
First few printouts after turning on the machine may have 189mm pitch blurred image (which
corresponds to the OPC drum circumference) on halftone images in high humidity environment.
(See sample below)
Cause
Charge failure caused by "corona products" that form on the OPC drum
If the symptom occurs when all of conditions below are met,
1408
No.
Image Transfer Current Setting: B&W
Image Transfer Current Setting: FC: Black
IMSS setting