44205301TH Rev.1
179 /
Oki Data CONFIDENTIAL
7. Troubleshooting and repair procedure
7.5.2. (18) Humidity sensor error (error code 123)
(18-1) Humidity sensor error
Check item Check work
Action to be taken
at NG
(18-1-1) Check the system connection
Connection between
the CU/PU board
and Operator Panel
Check if the 11-conductor FFC is connected
to the OPE connector
of the CU/PU board
normally or not.
Check if the 11-conductor FFC is connected
to the CN1 connector of the Operator Panel
board normally or not.
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.
Re-connect the
cable normally.
FFC connecting the
CU/PU board and
the Operator Panel
board
Check f
or open-circuit with VOM.
Check that peeling off of sheath does not occur
in any cables by visual inspection.
Replace the FFC
with the normal
FFC.
Check item Check work
Action to be taken
at NG
(18-1-2) Environment condition
Sharp change
of environment
condition
Is the environment condition changed sharply
from a low temperature environment to a high
environment condition within a short time?
(Example is such a case that a printer is moved
from storage condition of a cold area in winter to
an office environment.)
Leave a printer
for around one
hour in the new
environment
to get used
to the new
environment.
After that, turn
on the power
again.
Before turn
on the power,
touch the metal
panel of the
controller panel
and the metal
plate inside a
printer to feel
temperature
increase
inside a printer
with human
hands. After
confirmation
that the printer
temperature has
increased close
to the room
temperature,
turn on the
power again.
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