44952001TH Rev.2
7-68
Oki Data CONFIDENTIAL
7. TROUBLESHOOTING PROCEDURES
Check item
Checking method
Action in case of NG
(5-2-4) 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.
Pull out the CU/PU board HOP connector
①
,
and check the following at side of the cord:
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
Pull out the CU/PU board HOP connector
①
,
and check whether there is a resistance of
approximately 3.4 or 5 between the pins
1 and 2 and between the pins 3 and 4.
Replace the paper
feed motor.
7.5.5. (6) Paper running jam (error code 381:)
(6-1) Jam occurs immediately after the power is turned on.
Check item
Checking method
Action in case of NG
(6-1-1) Check condition of the running path.
Paper running path
of the front unit
Check if paper is jammed or not in the paper
running path.
Remove the jammed
paper.
(6-1-2) Check condition of the mechanical parts
Check the sensor
lever of 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.
(6-1-3) Check condition of electrical parts
Check the detection
condition of the
sensor signal.
Confirm that the sensor signals are normally
detected by using the SWITCH SCAN
function of the self-diagnostic mode.
Replace the CU/PU
board, or appropriate
sensor(s) or
connection cord(s).
Check the sensor
lever of the WR
sensor.
Check the following signal by using the CU/
PU board RGSNS connector
⑯
:
Replace the sensor.
