Uneven Density Appears Ln Bands - Ricoh FT4430 Service Manual

16 April '88
I
Is the exposure lamp stained black?
Y N
I
Correct uneven exposure using the adjusting plates.
I
Replace the exposure lamp.
Clean them.
2. Uneven Density Appears in Bands.
- Possible Causes -
+ Exposure lamp misaligned
+ Dirty quenching lamp
+ Dirty corona wire
incorrect
+
corona
- Action -
Does the darker area move with the image when making reduced copies?
Y N
I
Clean the charge corona wire.
P
across the drum.
Are any of the following parts stained or dirty?
I
Y N
I
Is the exposure lamp stained?
Y N
I
Correct using the adjusting plates. Does the problem still exist?
Y
I
Align the filament of the exposure lamp.
Replace the exposure lamp.
Clean them.
current
11-8