Oki C710, Руководство по обслуживанию

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43856301TH Rev.3
160 /
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 HOPSIZE 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 HOPSIZE 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 solenoid Confirm that the paper feed solenoid 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 solenoid becomes visible.
Then, check operation of the solenoid.
Replace the
PU board, or
replace the
paper feed
solenoid.
Paper feed solenoid Check that any obstacle does not exist that
hampers smooth operation of the movable
portion of the solenoid. (Obstacles such as cable
and others)
Normalize the
assembled
condition of a
printer.
Check item Check work
Action to be taken
at NG
(3-2-6) Check the system connection
Paper feed solenoid
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 solenoid
cable
Check that any cable is not pinched during
assembling of the printer.
Remove the HSOL connector of the PU board
and check the followings at the cable side.
Short circuit between pin-1 – FG
Remove the HSOL connector of the PU board
and check that approx. 89
Ω
can be measured
between pin-1 and pin-2.
Replace the
solenoid
assembly and
re-assemble the
printer correctly.