2KN/2KP
1-4-55
(9) Black dots appear on the image.
(10) Image is blurred.
(11) The leading edge of the image is consistently misaligned with the original.
(12) The leading edge of the image is sporadically misaligned with the original.
Copy example Causes Check procedures/corrective measures
Dirty or flawed drum. Clean the drum. If the drum is flawed, replace the drum
(see page 1-5-44).
Dirty contact glass. Clean the contact glass.
Dirty DP section. Clean the DP section.
Deformed or worn cleaning blade. Clean the cleaning blade.
Flawed developing roller. Replace the developing unit (see page 1-5-48).
Dirty heat roller separation claws. Clean the heat roller separation claws.
Copy example Causes Check procedures/corrective measures
Scanner moves erratically. Check if there is any foreign matter on the front and rear
scanner rails. If any, remove it.
Deformed press roller. Replace the press roller (see page 1-5-60).
Paper conveying section drive problem. Check the gears and belts and, if necessary, grease them.
Copy example Causes Check procedures/corrective measures
Misadjusted leading edge registration. Readjust the leading edge registration (see page 1-3-15).
Misadjusted scanner leading edge reg-
istration.
Readjust the scanner leading edge registration (see page
1-3-26).
Registration motor operating incor-
rectly.
Check the installation of the registration motor. If it operates
incorrectly, replace it.
Misadjusted the amount of slack in the
paper.
Run maintenance item U051 to readjust the amount of
slack in the paper.
Copy example Causes Check procedures/corrective measures
Registration motor, MP feed motor,
paper feed motor 1, paper feed motor
2, paper feed motor 3 or paper feed
motor 4 installed or operating incor-
rectly.
Check the installation position and operation of the registra-
tion motor, MP feed motor, paper feed motor 1, paper feed
motor 2, paper feed motor 3 and paper feed motor 4. If any
of them operates incorrectly, replace it.
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