Oki C810 Maintenance Manual page 193

Oki Data CONFIDENTIAL
Check item
(3-2-4) Check the system connection
Paper feed motor Check the connection condition of the cable.
drive 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.
Paper feed motor Check that any cable is not pinched during
drive cable assembling of the printer.
Remove the HOPSIZE connector
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
Paper feed motor Remove the HOPSIZE connector
PU board and check that approx. 3.4Ω can be
measured between pin-1 -pin-2 at the cable end,
and that approx. 5Ω can be measured between
pin-3 -pin-4 respectively.
(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.
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)
44015503TH Rev. 1
Action to be taken
Check work
at NG
Replace the
cable with the
good cable
that normalizes
the connection
condition.
Replace the
cable with the
of the PU good cable
that normalizes
the connection
condition.
of the Replace the
paper feed motor.
Replace the
PU board, or
replace the
paper feed
solenoid.
Normalize the
assembled
condition of a
printer.
Check item
(3-2-6) Check the system connection
Paper feed solenoid Check the connection condition of the cable.
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.
Paper feed solenoid Check that any cable is not pinched during
cable assembling of the printer.
Remove the HSOL connector
and check the followings at the cable side.
Short circuit between pin-1 – FG
Remove the HSOL connector
and check that approx. 89Ω can be measured
between pin-1 and pin-2.
7. TROUBLESHOOTING PROCEDURE
Action to be taken
Check work
at NG
Replace the
cable with the
good cable
that normalizes
the connection
condition.
Replace the
solenoid
of the PU board assembly and
re-assemble the
printer correctly.
of the PU board
192 /