Oki MC770 series Maintenance Manual - page 184
45376001TH Rev.1
183 /
Oki Data CONFIDENTIAL
7. Troubleshooting and repair procedure
(8-4) Two-sided printing jam occurs during transporting paper inside the Duplex unit.
Check item
Check work
Action to be taken
at NG
(8-4-1) Sensor lever operation check
Dup-R, Dup-F
sensor lever
Remove the Duplex unit and check movement of
the sensor lever.
Replace the
Duplexunit.
(8-4-2) Sensor check
Check the detection
condition of the
sensor signal
Confirm that the sensor signals are normally
detected by using the SWITCH SCAN function of
the self-diagnostic mode.
For all sensors except the Dup-IN sensor, check
the detection condition of the respective sensor
in the two status: One is the status in which
paper remains inside the Duplex unit. The other
is the status in which paper is removed from the
Duplex unit.
Replace the
Duplexunit.
(8-5) Paper is not supplied from the Duplex unit to the regist roller.
Check item
Check work
Action to be taken
at NG
(8-5-1) Clutch operation check
Duplex clutch
Confirm that the Duplex clutch works normally
by using the Motor & Clutch Test of the self-
diagnostic mode. Confirm it by listening to the
sound.
Replace the
Duplexunit.
7.5.4. (9) Paper size error (error code E061, E062, E063, E064, E065)
(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 multifeed
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.