2; Dotted Linesorbands - Ricoh FT4430 Service Manual

16 April '88
I
Correct or replace any defective parts and check operation again.
Is the edge of the cleaning blade deformed?
I
N
Y
I
Slightly increase the cleaning pressure.
Replace the cleaning blade.
2. Dotted Lines or Bands
- Possible Causes -
+ Pick-off pawl mechanism malfunction
+ scratched drum
- Action -
Do the pick-off pawls swing properly?
Y
N
I
I
Correct or replace the
Is the gap between the drum
Y N
I
} If the pick-off pawl mechanism does not work properly, correct or
replace any defective parts.
If the drum is scratched, correct the condition that caused the scratch;
F
I
then, replace the drum.'
Are the pick-off pawls are locked by toner or dust
N Y
I
Clean the pawl shaft and pick-off pawls using
Launa oil.
Are the pawl springs are defective.
Y
I
Replace the springs.
pick-off pawls, and replace the drum.
11-10
alcohol and lubricate with