43856301TH Rev.3
144 /
Oki Data CONFIDENTIAL
7. Troubleshooting and repair procedure
Display
Cause
Error details
Remedial measure
Service call
123: Error
Environment
humidity is
abnormal./
Humidity
sensor is not
connected.
Does this error recur?
Yes
Turn off the power
of the printer and
back on.
Replace the
control panel
board.
Service call
124: Error
Environment
temperature
is abnormal.
Does this error recur?
Yes
Turn off the power
of the printer and
back on.
Replace the
control panel
board.
Service call
126: Error
Dew
condensation
of the printer
is detected.
This error can easily occur
when a printer is brought in to
indoor from outdoor.
Leave the printer for 2 hours
or half day under room
temperature, and turn on the
power again.
Does this error recur?
Yes
After leaving a
printer under room
temperature, turn
on the power
again.
Replace the
control panel
board.
Service call
127: Error
Fuser
exhaust fan
error
Is the fan connector connected
normally?
Does this error recur?
No
Yes
No
Re-connect it
normally.
Replace the fan
motor.
Replace the PU
board.
Service call
128: Error
ID cooling fan
error
Is the fan connector connected
normally?
Does this error recur?
No
Yes
No
Re-connect it
normally.
Replace the fan
motor.
Replace the PU
board.
Service call
131: Error~
134: Error
LED head
detection
error
(131=Y,
132=M,
133=C,
134=K)
Is the LED head connected
normally?
Is the LED HEAD fuse brown?
Does this error recur?
No
Yes
Yes
No
Yes
Install the LED
head unit normally.
Check the LED
HEAD fuse.
After checking fuse
Turn on the power
again.
For the method of
checking the LED
head unit fuse,
refer to section 7.6.
Display
Cause
Error details
Remedial measure
Service call
142: Error
ID Up/Down
position
detection
error
Is the ID unit caught by
anything when it is removed
and re-installed?
Does this error recur?
Yes
No
Yes
Re-install the ID
unit.
Turn on the power
again.
Replace the ID
UP/DOWN sensor.
Service call
150: Error~
153: Error
The ID unit
fuse has
blown out.
(150=Y,
151=M,
152=C,
153=K)
Is the ID unit installed
normally?
Does this error recur?
Does the printer recover from
the error when the PU/PRZ
board is replaced?
No
Yes
Yes
No
Re-install the ID
unit.
Turn on the power
again.
After checking
for the sure
connection of the
cable between
PRZ board and
PU board, replace
the PRZ board.
Replace the PU
board.
Service call
154: Error
The belt unit
fuse has
blown out.
Is the belt unit connected
normally?
Does this error recur?
No
Yes
Yes
Re-install the belt
unit.
Turn on the power
again.
After checking
for the sure cable
connection,
replace the PU
board.
Service call
155: Error
The fuser
unit fuse has
blown out.
Is the fuser unit installed
normally?
Does this error recur?
No
Yes
Yes
After cleaning
the connecting
connector of the
fuser unit, re-install
the fuser unit.
Turn on the power
again.
After checking
for the sure cable
connection,
replace the PU
board.
