Copy Quality - Ricoh FT4480 Field Service Manual

COPY QUALITY

White Spots
1. FIREFLY SPOTS
- Possible Causes -
• Developer too old
• Insufficient toner in developer
around development unit
• Dirty seals
- Action -
Is there a small black spot in the center of the white spot?
Y N
I
Check and adjust the doctor gap (0.90 mm).
Is the image density too light?
Y N
I
• Clean the ends of the development roller.
• Replace the developer and the side seals.
Correct the light copy condition. Refer to "Light Copy" section.
2. SMALL SPOTS
- Possible Causes -
• Dirty corona wire.
• Incorrect corona current
- Action -
Perform drum conditioning. If that does not solve
whether the charge corona current is correct?
Y N
I
Adjust the charge corona current.
Clean the transfer corona wire and adjust the transfer current.
the problem, check
9-1
15 March 1987