Oki C911 Maintenance Manual

45530603TH Rev.2
4-66
Oki Data CONFIDENTIAL
4. TROUBLESHOOTING PROCEDURE
Check item Check work
Actions to be taken
at NG
(6-1-3) Motor operation check
Hopping motor Confirm that the hopping motor works
normally by using the Motor & Clutch Test of
the self-diagnostic mode.
Replace the
PU/CU PCB or
hoppin
g motor.
Hopping motor
driver
Confirm that the hopping motor works
normally by using the Motor & Clutch Test of
the self-diagnostic mode.
Replace the
PU/CU PCB.
MPT clutch Remove the HOPM connector of the PU/CU
PCB and check the following at the connector
side.
1 M
:
or more between pin-1/-2/-3/-4 and FG.
(6-1-4) Check the system connection
Hopping motor
drive cable
C heck the connection condition of the cable.
Visually check if the connector is connected
in the half-way only or not, and check if the
connector is inserted in a slanted angle or not.
Also check that cables are assembled without
any abnormality.
Normalize the
connection
condition.
Replace with a
normal cable.
Hopping motor
drive cable
Check that any cable is not pinched during
assembling of the printer.
Remove the HOPM connector of the PU/CU
PCB and check the following at the cable side.
Short circuit between pin-1/-2/-3/-4 and FG
Replace the
cable and
normalize the
assembled
condition.
Hopping motor Remove the HOPM connector of the PU/CU
PCB and check that a resistance of 10
:
or
less can be measured between pin-1 and pin-
2 and pin-3 and pin-4 respectively at the cable
side.
Replace the
hopping motor.
4.5.2.(7) Paper running jam (Error 381)
(7-1) Jam occurs immediately after the power is turned on.
Check item Check work
Actions to be taken
at NG
(7-1-1) Check condition of the running path.
Paper running
path between the
registration roller 2
and the fuser
C heck if paper is jammed or not in the paper
running path.
Remove the
jammed paper.
(7-1-2) Check condition of the mechanical parts
Check the sensor
lever of the paper
entrance sensor 3.
Check if shape and movement of the sensor
levers have any abnormality or not.
Replace with a
normal sensor
lever.
(7-1-3) Check condition of electrical parts
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.
Replace the
PU/CU PCB
or connection
cable.

Oki C911 Specifications

General

Brand	Oki
Model	C911
Category	Printer
Language	English