Oki Data CONFIDENTIAL
45850101TH Rev.1
2-66
2. TROUBLESHOOTING PROCEDURES
(5-2)
Error occurs approx. 1 minute after the power is turned on.
Check item
Check work
Actions to be taken
at NG
(5-2-1)
Temperature increase of fuser unit
Thermostat, heater
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-4 and between pin-3 and
pin-4 is about 4 to 7
Ω
, between pin-1 and pin-
2 and between pin-3 and pin-2 is about 1 to 3
Ω
respectively. (Refer to section 6.3 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.
(5-2-2)
Temperature increase of fuser unit
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.
Check item
Check work
Actions to be taken
at NG
(5-2-3)
AC power input for the fuse
AC power voltage
from the low voltage
power supply
Check if the AC voltage for heater is normally
supplied or not.
Power supply J2 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.
Power connector of the CU/PU board, between
pin-18 and pin-19.
Replace the CU/
PU board.
