Fuzzy Lines Or Bands; Uneven Density - Ricoh FT4430 Service Manual

3. Fuzzy Lines or Bands

- Possible Causes -
+ Dirty corona wire
- Action -
Clean the charge, transfer, and PTL.

UNEVEN DENSITY

Changes Across The Copy
- Possible Causes -
Charge corona wire height not even
+ Charge corona wire dirty
+ Doctor gap not even
- Action -
Does the darker area follow the image
I
Y N
I
Clean the charge corona wires.
positioned in the wire cleaner and end block?
Y N
I
Is the charge corona current uneven across the drum?
Y
I
Adjust the charge corona current and wire height.
Position the wires correctly.
If the problem still exists, check and adjust the doctor gap.
Are any of the optics parts stained?
N
Y
I I
I
N
Clean the transfer corona unit.
when making reduced copies?
Are the charge corona wires incorrectly
11-7
16 Aprit '88