Oki C821 Maintenance Manual

44015503TH Rev. 1
202 /
Oki Data CONFIDENTIAL
7. TROUBLESHOOTING PROCEDURE
7.5.2.(9) Paper size error (error code 400 and 401)
(9-1) Jam occurs when paper end is located near the IN1 sensor.
Check item Check work
Action to be taken
at NG
(9-1-1) Check paper feed condition
Multifeed of papers Open the front cover and check if multifeed of
papers occurs or not.
If the m
ultifeed
occurs again
after the
jammed paper
is removed,
replace the flap
of the tray in
use.
Paper size Does the paper size specified for print match the
paper size of paper stuck in the tray.
Change the
specified paper
size or size of
paper inside the
tray.
Paper entrance
sensor 1
Check if shape and movement of the sensor
levers have any abnormality or not.
Replace the
sensor lever
with the good
sensor lever.
7.5.2.(10) ID unit Up/Down error (Service call 140 to 143)
(10-1) Error occurs during the Up movement of the ID unit
Check item Check work
Action to be taken
at NG
(10-1-1) Check the mechanical load during the Up movement
Mechanical load
during installation
and removal of the
ID unit
Chec
k if abnormal heavy load is applied when
removing the ID unit.
IReplace the ID
unit, or replace
the right/left side
plate.
If any attempt
of using new
ID unit as a
trial is going
to be made,
be sure to use
the System
Maintenance
Menu FUSE
KEEP MODE.
Greasing to the right
and left Up/Down
link levers
Check if the slant surface of the link lever is
coated by grease or not.
Apply grease.
Assembled
condition of the right
and left Up/Down
link levers
Check if any part exists or not in the vicinity of
link lever, that hampers movement of the link
lever.
Assemble them
correctly.
(10-1-2) Up/Down mechanism
Assembled
condition of
the peripheral
mechanism of the
link le
ver
Is the mechanism assembled so that the link
lever is connected to the planetary driving gear?
Assemble them
correctly.
Right and left link
levers
Check if the link lever is set in the correct
position that enables the specified engagement
of gears.
(Check if the link lever is set in the wrong
position that results in the wrong engagement of
gears b
y several teeth.)
Assemble them
correctly.

Oki C821 Specifications

General

Brand	Oki
Model	C821
Category	All in One Printer
Language	English