Oki MC760 User Manual

45376001TH Rev.1
173 /
Oki Data CONFIDENTIAL
7. Troubleshooting and repair procedure
Check item Check work
Action to be taken
at NG
(3-2-4) Check the system connection
Paper feed motor
drive cable
Check the connection condition of the cable.
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. Check
also that cables are assembled without any
abnormality.
Replace the
cable with the
good cable
that normalizes
the connection
condition.
Paper feed motor
drive cable
Check that any cable is not pinched during
assembling of the printer.
Remove the HP_PSZCL connector
of the PU
board and check the followings at the cable side.
Short circuit between pin-1 – FG
Short circuit between pin-2 – FG
Short circuit between pin-3 – FG
Short circuit between pin-4 – FG
Replace the
cable with the
good cable
that normalizes
the connection
condition.
Paper feed motor Remove the HP_PSZCL connector
of the
PU board and check that approx. 3.4
Ω
can be
measured between pin-1 -pin-2 at the cable end,
and that approx. 5
Ω
can be measured between
pin-3 -pin-4 respectively.
Replace the
paper feed motor.
(3-2-5) Solenoid operation check
Paper feed clutch Confirm that the paper feed clutch or regist
clutch works normally by using the Motor &
Clutch Test of the self-diagnostic mode.
Remove the metal plate from the right side of a
printer so that the clutch becomes visible. Then,
check operation of the clutch.
Replace the PU
board, or replace
the paper feed
clutch or regist
clutch.
Check item Check work
Action to be taken
at NG
(3-2-6) Check the system connection
Paper feed clutch
cable
Check the connection condition of the cable.
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. Check
also that cables are assembled without any
abnormality.
Replace the
cable with the
good cable
that normalizes
the connection
condition.
Paper feed clutch
cable
Check that any cable is not pinched during
assembling of the printer.
Remove the CL1 connector
of the PU board
and check the followings at the cable side.
Short circuit between pin-1 – FG
Remove the CL1 connector
of the PU board
and check that approx. 240
Ω
can be measured
between pin-1 and pin-2.
Replace the
solenoid and re-
assemble the
printer correctly.

Oki MC760 Specifications

General

Brand	Oki
Model	MC760
Category	Printer
Language	English