Oki C301 Maintenance Manual

44951501TH Rev.2
7-55
Oki Data CONFIDENTIAL
7. TROUBLESHOOTING
7.5.2. (18) Humidity sensor error (error code 123)
(18-1) Humidity sensor error
Check item Check operation
Actions for NG
results
(18-1-1) Check the system connection
Connection to the
CU/PU board and
to the toner sensor
board
Check if the 16-conductor FFC is connected
to the SSNS connector
of the CU/PU board
normally.
Check if the 16-conductor FFC is connected
to the SSNS connector
19
of the toner sensor
board normally.
Re-connect the
cable normally.
FFC connecting the
CU/PU board and
the toner sensor
board
Check for 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 operation
Actions for NG
results
(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.

Oki C301 Specifications

General

Brand	Oki
Model	C301
Category	Printer
Language	English