Oki Data CONFIDENTIAL
45850101TH Rev.1
2-71
2. TROUBLESHOOTING PROCEDURES
2.5.5. (12) Humidity sensor error (Error code: 123)
(12-1) Humidity sensor error
Check item
Check work
Actions to be taken
at NG
(12-1-1) Check the system connection
Connection between
the CU/PU board
and the control
panel board
Check if the 10-conductor FFC is connected to
the OPE connector of the CU/PU board properly.
Check if the 10-conductor FFC is connected to
the CN501 connector of the control panel board
properly.
Check the connectors for half-way connection or
angled connection.
Re-connect the
cable normally.
FFC connecting the
CU/PU board and
the control panel
board
Check for open-circuit with VOM.
Visually check that the sheath for peeling.
Replace the FFC
with a normal
FFC.
FFC connecting the
CU/PU board and
the environment
sensor board
Check for open-circuit with VOM.
Visually check that the sheath for peeling.
Replace the FFC
with a normal
FFC.
Check item
Check work
Actions to be taken
at NG
(12-1-2) 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.
