Kyocera KM-C2520 Service Manual page 213

(9) One side of the copy image is darker than the other.
Copy example
Defective exposure lamp.
(10) Dots appear on the image.
Copy example
Dirty or flawed drum.
Dirty contact glass.
Deformed or worn cleaning blade of
the drum unit.
Flawed developing roller.
Dirty fuser belt or press roller (inner
fuser unit).
(11) The leading edge of the image is consistently misaligned with the original.
Copy example
Registration clutch operating incor-
rectly.
Misadjusted the deflection in the
paper.
Misadjusted leading edge registration. Run maintenance mode U034 to readjust the leading edge
Misadjusted scanner leading edge
registration.
(12) The leading edge of the image is sporadically misaligned with the original.
Copy example
Paper feed clutch 1/2, paper convey-
ing clutch, MP paper feed clutch, MP
paper conveying clutch or registration
clutch installed or operating incor-
rectly.
Causes
Causes
Causes
Causes
Check procedures/corrective measures
Check if the exposure lamp light is distributed evenly to run
maintenance item U061. If not, replace the exposure lamp
(see page 1-3-19 and page 1-5-9).
Check procedures/corrective measures
Perform the drum refresh operation (see page 1-3-118).
If the drum is flawed, replace the drum unit (see page 1-5-
27).
Clean the contact glass.
Replace the drum unit (see page 1-5-27).
Replace the developing unit (see page 1-5-26).
Replace the fuser unit (see page 1-5-31).
Check procedures/corrective measures
Check the installation of the registration clutch. If it operates
incorrectly, replace it.
Run maintenance mode U051 to readjust the deflection in
the paper (see page 1-3-16).
registration (see page 1-3-13).
Run maintenance mode U066 to readjust the scanner lead-
ing edge registration (see page 1-3-20).
Check procedures/corrective measures
Check the installation position and operation of paper feed
clutch 1/2, paper conveying clutch, MP paper feed clutch, MP
paper conveying clutch and registration clutch. If any of them
operates incorrectly, replace it.
2FZ/2F0/2HC-5
1-4-53