Oki MC860 MFP, Руководство по обслуживанию

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Oki Data CONFIDENTIAL
43967002TH Rev. 1
331 /
7. Troubleshooting
(5-2) Jam occurs immediately after paper feed is started. (Multipurpose tray)
Check item Check work Action to be taken at NG
(5-2-1) Check the condition of the paper running path
Paper running path
of the multipurpose
tray Check if paper is jammed or not in the
paper running path. Remove the
jammed paper.
Sheet Receive of
the multipurpose
tray Confirm that the Sheet Receive has moved
up normally.
Confirm that the support spindle and spring
of the Sheet Receive have been installed in
the specified positions normally. Correct installation
of the above parts
so that the Sheet
Receive moves
up to the specified
position normally.
(5-2-2) Check condition of the mechanical parts
Check the sensor
levers of the paper
entrance sensor 2
and the WR sensor. Check if shape and movement of the
sensor levers have any abnormality or not. Replace the sensor
lever with the good
sensor lever.
Planetary gear for
paper feed control Rotate the paper feed motor (FRONT
MOTOR) using the Motor & Clutch Test of
the self-diagnostic mode, and confirm that
both of the two planetary gears rotate at
the bottom position. (The planetary gear
box can be located because it is the white
molded block that is located on the right
side when the front cover is opened.) Replace the
planetary gear box.
Front cover Confirm that the locks in the right and left
of the front cover are locked normally. Replace the font
cover assembly.
Check the paper
feed roller and the
pickup roller. Check if any foreign materials such as
paper dust on the surface of the feed roller
or of the pickup roller or not. Remove the foreign
material.
Check if the feed roller has worn out or not. Replace the feed
roller.
Check item Check work Action to be taken at NG
(5-2-3) Motor operation check
Paper feed motor Confirm that the paper feed motor works
normally by using the Motor & Clutch Test
of the self-diagnostic mode. Replace the PU
PCB or paper feed
motor.
Paper feed motor
driver Remove the HOPSIZE connector of the
PU PCB and check the followings at the
connector side.
Several M
Ω
between pin1 – FG.
Several M
Ω
between pin2 – FG.
Several M Ω between pin3 – FG.
Several M
Ω
between pin4 – FG.
PU PCB
replacement
(5-2-4) Check the system connection
Paper feed motor
drive cable Check the connection condition of the
cables.
HOPIDUP connector of the PU PCB
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. Normalize the
connection
condition.
Replace the cable
with the normal
cable.
Paper feed motor
drive cable Check that any cable is not pinched during
assembling of the printer.
Remove the HOPSIZE connector of the
PU PCB and check the followings at the
cable side.
Short circuit between pin1 – FG
Short circuit between pin2 – FG
Short circuit between pin3 – FG
Short circuit between pin4 – FG
Replace the cable
with the good one
that normalizes
the connection
condition.
Paper feed motor Remove the HOPSIZE connector of the
PU PCB and check that approx. 3.4 ohms
can be measured between pin1 -pin-2 at
the cable end, and that approx. 5 ohms
can be measured between pin3 -pin-4
respectively. Replace the paper
feed motor.