44952001TH Rev.2
7-44
Oki Data CONFIDENTIAL
7. TROUBLESHOOTING PROCEDURES
Display Cause Error details Measure
Inspection is
required.
112 : Error
The 2nd tray
for a model
different from
the MFP was
detected.
Is the 2nd tray for the MFP
installed?
No Install proper 2nd tray.
Inspection is
required.
121 : Error
High-voltage
power supply
interface error
Is the cable between the CU/
PU board and the high-
voltage power unit connected
properly?
Isacontactfaulty?
No
Yes
No
Reconnect it properly.
Check the high-
voltage line for no poor
connection.
Replace the high-
voltage power supply.
Inspection is
required.
122 : Error
Rear-fan error Does the fan at the rear of
theMFPoperate?
Is the connector of the fan
connectedproperly?
No
Yes
No
Yes
Be sure of the
connection of the
fan.
Replace the CU/PU
board.
Connect the fan
properly.
Replace the CU/PU
board.
Inspection is
required.
123 : Error
Ambient
humidity
error or non
connection
of humidity
sensor
Is the cable from the CU/PU
board to the toner sensor
boardconnectedproperly?
No
Yes
Re-connect it properly.
Replace the toner
sensor board.
Inspection is
required.
124 : Error
Ambient
temperature
error
Is the cable from the CU/PU
board to the toner sensor
boardconnectedproperly?
No
Yes
Re-connect it properly.
Replace the toner
sensor board.
Power Off and
Wait for a while
126 : Condensing
Error
Condensation
on the device
was detected.
Condensation is likely to
form in such a case that a
device is carried in from the
outdoors.
Leave the device untouched
for two hours to a half day
and turn on the power unit.
Doestheerroroccuragain?
Yes Leave the device
untouched and turn on
the power unit.
Replace a control
panel board.
Inspection is
required.
127 : Error
An error of
exhaust fan of
the Fuser
Is the fan's connector
properlyconnected?
Doestheerroroccuragain?
No
Yes
No
Connect properly.
Replace the fan's
motor.
Replace the PU board.
Display Cause Error details Measure
Inspection is
required.
128 : Error
05
Image drum
fan error
Is the connector of the fan
connectedproperly?
Doestheerroroccuragain?
No
Yes
No
Re-connect it properly.
Replace the fan motor.
Replace the CU/PU
board.
Inspection is
required.
128 : Error
08
Front fan error Is the connector of the fan
connectedproperly?
Doestheerroroccuragain?
No
Yes
No
Re-connect it properly.
Replace the fan motor.
Replace the CU/PU
board.
Inspection is
required.
131 : Error
～
134 : Error
LED head
detection
error (131=Y,
132=M,
133 = C,
134 =K)
Is the LED head installed
properly?
Is the LED head fuse
broken?
Doestheerroroccuragain?
No
Yes
Yes
No
Yes
Install the LED head
unit.
Check the LED head
fuse.
Check the fuse.
Turn off and on the
M F P.
Replace the LED head
unit.
Inspection is
required.
142 : Error
Image drum
up-down
movement
position
detection error
Is the image drum unit
removed and installed
smoothly?
Is the connector of the image
drum up-down clutch is
connectedproperly?
Yes
No
Yes
No
Re-install it.
Be sure of the
connection of the
image drum up-down
clutch connector.
Replace the toner
sensor board.
Connect the image
drum updown clutch
properly.
Inspection is
required.
153 : Error
Image drum
unit fuse-cut
error
Is the image drum unit
installedproperly?
Doestheerroroccuragain?
Is the MFP recovered by
replacing the toner sensor
board.
No
Yes
Yes
No
Re-install it.
Turn off and on the
M F P.
Be sure of the cable
connection from the
CU/PU board to the
toner sensor board,
and then replace the
toner sensor board.
Replace the CU/PU
board.
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