Ricoh FT5034 Service Manual page 124

Vertical Black Line
Development
1
Unit
Lens, mirrors
and cleaning
2
blade
Drum or hot
3
roller
Check for
toner pile-up on
4
dev. unit.
Action
Check the Dev. Unit Installation
2-1. Check the toner shield glass
2-2. Clean the surface of the mirrors
2-3. Check the cleaning blade
2-4. Check the image density
3-1. Check for scratches on the drum
3-1. Check for scratches on the hot
roller
3-3. Stained exposure glass
3-4. Glue left on the drum
4-1. Check for toner pile-up in the dev.
unit
4-2. Check and adjust the exposure
adjusting plate if it is already
adjusted
4-3. Check the exposure lamp
- Discoloration
- Deformation of the lamp filament
- 123 -
Remarks
* Due to adhering launa
oil, the 1st and 2nd
mirrors may be
contaminated.
* Due to deterioration of
the exposure lamp, a
black line may appear
on the copy.
If the filament is
stretched, see below.
Traces of the pick-off
pawls are 80 mm apart.