Humidity Sensor Error (Error Code: 123); Humidity Sensor Error - Oki MC873dn Maintenance Manual

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2.5.5. (12) Humidity sensor error (Error code: 123)

(12-1)

Humidity sensor error

Check item
(12-1-1) Check the system connection
Connection between Check if the 10-conductor FFC is connected to
the CU/PU board the OPE connector of the CU/PU board properly.
and the control Check if the 10-conductor FFC is connected to
panel board the CN501 connector of the control panel board
properly.
Check the connectors for half-way connection or
angled connection.
FFC connecting the Check for open-circuit with VOM.
CU/PU board and Visually check that the sheath for peeling.
the control panel
board
FFC connecting the Check for open-circuit with VOM.
CU/PU board and Visually check that the sheath for peeling.
the environment
sensor board
45850101TH Rev.1
Actions to be taken
Check work
at NG
Re-connect the
cable normally.
Replace the FFC
with a normal
FFC.
Replace the FFC
with a normal
FFC.
Check item
(12-1-2) Environment condition
Sharp change Is the environment condition changed sharply
of environment from a low temperature environment to a high
condition 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.)
2. TROUBLESHOOTING PROCEDURES
Actions to be taken
Check work
at NG
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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