Oki Data CONFIDENTIAL
45850101TH Rev.1
2-48
2. TROUBLESHOOTING PROCEDURES
Check item
Check work
Actions to be taken
at NG
(3-1-2-3) Motor operation check
Hopping motor of
the applicable tray
Confirm that the hopping motor of the applicable
tray works normally by using the Motor & Clutch
Test of the self-diagnostic mode.
Replace the CU/
PU board or the
2nd(3rd/4th)
Tray unit board
(Board-GOH-2)
or the hopping
motor.
-Error code:391
Hopping motor driver
Remove the MOTERCL connector of the CU/PU
board and check the following at the connector
side.
Several M
Ω
between pin-5 – FG.
Several M
Ω
between pin-6 – FG.
Several M
Ω
between pin-7 – FG.
Several M
Ω
between pin-8 – FG.
Replace the CU/
PU board.
(3-1-2-4) Check the system connection of Tray1
Hopping 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.
Hopping motor drive
cable
Check that any cable is not pinched during
assembling of the printer.
Remove the MOTERCL connector of the CU/PU
board and check the following at the cable side.
Short circuit between pin-5 – FG
Short circuit between pin-6 – FG
Short circuit between pin-7 – FG
Short circuit between pin-8 – FG
Replace the
cable with the
good cable
that normalizes
the connection
condition.
Hopping motor
Remove the MOTERCL connector of the CU/
PU board and check that approx. 3.4
Ω
can be
measured between pin-5 -pin-6 and pin-7 -pin-8
respectively at the cable end.
Replace the
hopping motor.
Check item
Check work
Actions to be taken
at NG
(3-1-2-5) Clutch operation check
-Error code:391
Tray1 Hopping
Clutch
-Error code 392:
Tray2 Hopping
Clutch,
Tray2 Feed Clutch.
-Error code 393:
Tray3 Hopping
Clutch,
Tray3 Feed Clutch
-Error code 394:
Tray4 Hopping
Clutch,
Tray4 Feed Clutch
Check to make sure that the applicable clutch
works normally by using the Motor & Clutch Test
of the self-diagnostic mode.
Open the front cover so that the rollers can be
seen to check.
Replace the CU/
PU board or the
2nd(3rd/4th)
Tray unit board
(Board-GOH-2)
or replace the
applicable
clutch.
(3-1-2-6) Check the system connection of Tray1
Clutch cable for
paper feed
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.
Cable for paper feed
clutch
Check that any cable is not pinched during
assembling of the printer.
Remove the HOPLC connector of the CU/PU
board and check the following at the cable side.
Short circuit between pin-1 – FG
Remove the HOPCL connector of the CU/
PU board and check that approx. 240
Ω
can be
measured between pin-1 and pin-2.
Replace the
clutch and
assembly it
again correctly.
