44346001TH Rev.1
163 /
Oki Data CONFIDENTIAL
7. TROUBLESHOOTING
Check item
Check operation
Actions for NG
results
(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.
Pull out the CU/PU board HOPSIZE connector
1, and check the following at the side of the
connector.
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 can be
measured between pin-1 -pin-2 at the cable end,
and that approx. 5 can be measured between
pin-3 -pin-4 respectively.
Replace the
paper feed motor.
(3-2-5) Solenoid operation check
Feed clutch
Confirm that the paper feed solenoid works
normally by using the Motor & Clutch Test of the
self-diagnostic mode.
Pull out the cassette for the rollers to be seen,
and check operation.
Replace the
CU/PU board
or the feed
solenoid.
(3-2-6) Check the system connection
Feed clutch cord
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.
Cord for feed clutch
Check that any cable is not pinched during
assembling of the printer.
Pull out the CU/PU board HOC connector
14, and check the following at the side of the
cord.
Replace the
clutch and
properly
assemble
appropriate
parts.
7.5.2. (4) Feed jam (error code 380)
(4-1) Jam occurs immediately after the power is turned on.
Check item
Check operation
Actions for NG
results
(4-1-1) Check condition of the paper running path
Paper running path
of the front unit
Open the front cover check if paper is not
jammed in the paper running path.
Remove the
jammed paper.
(4-1-2) Check condition of the mechanical parts
Hopping sensor,
IN sensor and WR
sensor lever check
Check the sensor lever shapes and operations
for any problem.
Replace the
sensor lever(s)
with proper
one(s).
(4-1-3) Check condition of electrical parts
Check the detection
condition of the
sensor signal.
Confirm that the sensor signals are normally
detected by using the Maintenance Menu
SWITCH SCAN function.
Replace the
CU/PU board
or appropriate
connection
cords.
Hopping sensor,
IN sensor and WR
sensor output level
check
Check the following signals by using the CU/
PU board HPSNS and RGSNS connector 16:
HPSNS pin 2: Hopping sensor
RGSNS pin 5: IN sensor
RGSNS pin 2: WR sensor
Confirm that the above signal levels change
when the sensor lever is operated.
Replace the
appropriate
sensor(s).