Ricoh M0A0 Service Manual page 317

Problems with the printed result
(other than black or white dots)
Black or white dots
The LED head contains 26 LED chips, each covering a line 8 mm wide. If a line 8 mm wide extending in the paper feed
direction appears, an LED chip may be damaged. If so, replace the LED head.
1. 8 mm
2. 8 mm
When Vertical Banding is Generated
The vertical banding on a print image may be improved by the [Drum Rotation] function.
1.
Select a drum rotation level.
[User Tools/Counter] key > Maintenance > Drum Rotation
2.
Select a drum rotation level from the following 2 levels: Level 1 (Normal) and Level 2 (Strong).
Operation

Level 1 : Photoconductor idles for 55 seconds

Level 2 : Photoconductor idles for 30 seconds (for black and white vertical banding)
Effectively Prevented Problems

Level 1 : Pieces of white banding (for half tone or continuous printing)
 Level 2 : White vertical banding (for half tone), black vertical banding, and black horizontal banding

If the [Drum Rotation] function is performed many times, the life of the drum unit may be shortened.
Problems Intervals
29.9mm Charge roller
37.7mm Registration roller
45.8mm Image transfer roller
112mm Fusing pressure roller
94mm Fusing roller
100.5mm Paper feed roller
35.6mm Development roller
94.4mm Drum
6.Troubleshooting
Defective parts
305