Ricoh FT4430, Service Manual

Page: 320 / 465

16 April ’88
2. Straight Sharp Lines
- Possible Causes -
+ Drum Scratched
+ Cleaning blade damaged
+ Cleaning brush worn
+ Hot roller scratched
+ Hot roller strippers worn
- Action -
Start a copy cycle and stop it before the copy reaches the fusing unit.
Do the same lines exist on the unfused copy?
Y
N
I
If the surface of the hot roller is scratched, which part is scratching the
hot roller surface?
Clean, correct, and/or replace any parts which scratch the hot roller. If
the hot roller strippers are badly stained with toner, check and adjust
the fusing temperature. Then, replace the hot roller.
Is the drum scratched?
Y
N
I
Follow troubleshooting section “Uneven Density 1) Uneven density
appears in bands. ”
Correct or replace any parts scratching the drum surface.
Are there any foreign substances around the drum that may cause leaking of
the drum potential?
Y
N
I
I
Clean the edge of the cleaning blade. Check that the movement of the
blade cleaner is smooth and the cleaner edge is straight.
~ Clean all seals.
Remove the foreign substances.
11-6