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?
Isacontactfaulty?
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
theMFPoperate?
Is the connector of the fan
connectedproperly?
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
boardconnectedproperly?
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
boardconnectedproperly?
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.
Doestheerroroccuragain?
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
properlyconnected?
Doestheerroroccuragain?
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
connectedproperly?
Doestheerroroccuragain?
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
connectedproperly?
Doestheerroroccuragain?
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?
Doestheerroroccuragain?
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
connectedproperly?
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
installedproperly?
Doestheerroroccuragain?
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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