Table of Contents
Advertisement
DIRTY BACKGROUND ON ENTIRE COPY IMAGE
1-10
-
Possible Causes -
Incorrect exposure lamp output
Inefficient drum cleaning
Development bias malfunction
Toner supply clutch malfunction
Incorrect corona current
Doctor gap too large
Quenching lamp open
Dirty optics
- Action -
Clean the optics and the quenching lamp. Confirm that the quenching lamp
is on while copying.
Is the dirty background reduced if more cleaning pressure is provided by re-
positioning the cleaning solenoid?
N
Y
Replace the cleaning blade.
toner supply roller gear always turning while copying?
N
Y
Is CNI 11-1 always low?
N
Y
I
Replace the main PCB.
Clean the contact surfaces of the toner supply clutch or replace the
clutch.
N
4-15
1 Nov. '87
Advertisement
Table of Contents
