Oki MC351 User Manual

44473001TH Rev.1
240 /
Oki Data CONFIDENTIAL
7. TROUBLESHOOTING PROCEDURES
(11-2) Error occurs approx. 1 minute after the power is turned on.
Check item Check operation
Actions for NG
results
(11-2-1) Temperature increase of fuser unit
Thermostat,
halogen lamp
Heater of the fuser unit is controlled of its
temperature. Check if the fuser unit gets hot or
not by touching it with hands.
If the fuser unit temperature does not increase
and remains cold, check that the resistance
between pin-1 and pin-2, and that in between
pin-3 and pin-4 of the two connectors is in the
range of several ohms to several ten ohms
respectively. (Refer to section 8.1 Resistance
value (fuser unit).)
Replace the
fuser unit.
If any attempt
of using new
fuser unit as
a trial is going
to be made,
be sure to use
the System
Maintenance
Menu FUSE
KEEP MODE.
Check item Check operation
Actions for NG
results
(11-2-2) Temperature increase of fuser unit
Installation position
of the upper
thermistor
Check if the upper thermistor is installed in the
far position from the specified position or not
causing detection of the lower temperature than
the actual temperature of fuser unit.
Remove the heater cover, and check warpage of
sensor by visual inspection.
Replace the
fuser unit.
If any attempt
of using new
fuser unit as
a trial is going
to be made,
be sure to use
the System
Maintenance
Menu FUSE
KEEP MODE.
Installation position
of the lower
thermistor
The lower thermister must be installed while
contacting with the fuser unit. Check if the lower
thermister is installed in the far position from the
specified position or not causing detection of the
lower temperature than the actual temperature of
fuser unit.
Replace the
fuser unit.
If any attempt
of using new
fuser unit as
a trial is going
to be made,
be sure to use
the System
Maintenance
Menu FUSE
KEEP MODE.
(11-2-3) AC power input to the halogen lamp
AC power voltage
from the low voltage
power supply
C
h
eck if the AC voltage for heater is normally
supplied or not.
Power supply CN2 connector
, between pin-1
and pin-2, and between pin-3 and pin-4.
Replace the low
voltage power
supply.
Heater ON signal
that is output from
PU to the low
voltage power
supply
Check that the heater ON signal goes active at
the warming up timing, or not.
"L" active while ON.
CU/PU board POWER connector-10 pins 14 and
15
Replace the
CU/PU board.

Oki MC351 Specifications

General

Brand	Oki
Model	MC351
Category	All in One Printer
Language	English