Oki C810 Maintenance Manual page 184

Oki Data CONFIDENTIAL
Confirmation Items
(6-2-4) Check of connections
Feed motor drive Check the connected states of the cords.
cord, ID motor drive Check for any incomplete connection or skew
cord, belt motor, ID- insertion
of the HOPIDUP connector ① , DCID connector
up motor drive cord,
fuser drive cord ② , DCHEAT connector ④ , BELT connector
③ and RELAY Connector ⑧ of the PU PCB.
Check for any incomplete connection or skew
insertion, and examine the cords visually to see
if they have any assembling problem.
Feed motor drive Check to make sure that none of the cords is
cord, ID motor drive caught under any assembled part of the printer.
Unplug the HOPIDUP connector ① of the PU
cord, belt motor, ID-
up motor drive cord
PCB, and confirm the following on the cord
side:
Short-circuiting between pin 1 and FG
Short-circuiting between pin 2 and FG
Short-circuiting between pin 3 and FG
Short-circuiting between pin 4 and FG
Unplug the BELT connector ③ of the PU PCB,
and confirm the following on the cord side:
Short-circuiting between pin 1 and FG
Short-circuiting between pin 2 and FG
Short-circuiting between pin 3 and FG
Short-circuiting between pin 4 and FG
Short-circuiting between pin 5 and FG
Short-circuiting between pin 6 and FG
Short-circuiting between pin 7 and FG
Short-circuiting between pin 8 and FG
Feed motor, belt Unplug the connectors of the respective PCBs,
motor, ID up-motor and
confirm that there are the following resistances
between
the pins of the cord side:
HOPIDUP connector ① of PU PCB
Between pin 1 and pin 2: Approx. 3.4 or 5Ω
Between pin 3 and pin 4: Approx. 3.4 or 5Ω
Between pin 5 and pin 6: Approx. 3.4 or 5Ω
Between pin 7 and pin 8: Approx. 3.4 or 5Ω
BELT connector ③ of PU PCB
Between pin 1 and pin 2: Approx. 6.1 or 3.5 Ω
Between pin 3 and pin 4: Approx. 6.1 or 3.5 Ω
44072903TH Rev.1
Confirmation Tasks Action at NG

Correct the
connection
properly.
Replace the
cord with a
normal one.
Replace the
cord, and
correct the
assembling to
make it normal.

Replace the
feed motor, ID
motor, or belt
motor.
(6-3) Paper path jam occurs in a path route
Confirmation Items
(6-3-1) Check of operating state of motors

Feed motor, belt Conduct the Motor and Clutch Test of the
motor, ID motor, ID self-diagnostic mode, and check to see if the
up/down-motor feed motor, belt motor and ID motor operate
normally.
Make this checking in the presence and
absence of a load.
Unplug the HOPIDUP connector ① of the PU
Feed motor driver,
belt motor driver, ID
PCB, and confirm the following on the connector
up-motor driver
side:
Several MΩ between pin 1 and FG
Several MΩ between pin 2 and FG
Several MΩ between pin 3 and FG
Several MΩ between pin 4 and FG
Several MΩ between pin 5 and FG
Several MΩ between pin 6 and FG
Several MΩ between pin 7 and FG
Several MΩ between pin 8 and FG
Unplug the BELT connector ③ of the PU PCB,
and confirm the following on the connector side:
Several MΩ between pin 1 and FG
Several MΩ between pin 2 and FG
Several MΩ between pin 3 and FG
Several MΩ between pin 4 and FG
7. TROUBLESHOOTING PROCEFRURES
Confirmation Tasks Action at NG
Replace the PU
PCB, or replace
the feed motor,
belt motor, ID
motor, or ID
up-motor, or
replace the ID
unit or belt unit.
To use a new ID
unit or belt unit
on a trial basis,
use FUSE
KEEP MODE
of the System
Maintenance
Menu.
Replace the
PU PCB, if the
feed motor,
belt motor or D
motor is faulty,
or replace the
motor driver
PCB if the belt
motor is faulty.
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