45530603TH Rev.2
4-73
Oki Data CONFIDENTIAL
4. TROUBLESHOOTING PROCEDURE
(12-2) Error occurs approx. 1 minute after the power is turned on.
Check item
Check work
Actions to be taken
at NG
(12-2-1) 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 is
not open. (Normally, the following resistance
values are measured.)
Between pin-1 and pin-2: several tens ohms
Between pin-1 and pin-4: several ohms
Between pin-2 and pin-4: several tens of ohms
(Refer to section 9.1 Resistance value (fuser
unit).)
Replace the
fuser unit.
To use a new
fuser unit for a
try, be sure to
use New Parts
Keep Mode
of the System
Maintenance
menu.
(12-2-2) AC power input for the fuser
AC power voltage
from the low
voltage power
supply
Disconnect the AC cable from the printer
and check that the voltage of the AC cable
connector is within 100V±10%, which is the
rated voltage
Check that the AC cable is not routed far from
the socket and not connected to a multi-outlet
adopter.
Correct the
connection
line. If the
connection has
no problem,
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 printer control PCB,
between pin-5 and pin-3.
Replace the
printer control
PCB.
4.5.2.(13) Motor fan error (Service calls 128-01 to 128-10 and 051)
(13-1) The low voltage power supply fan does not rotate immediately after the power is
turned on.
Check item
Check work
Actions to be taken
at NG
(13-1-1) Electric parts
Wiring condition of
the fan causing an
error
Check if the connectors are connected
normally or not.
Check if extra length of the cables does not
touch the fan blade or not.
Correct the
connection
condition of
the connectors.
Correct the
cable wiring
route. Replace
the fan.
Controller PCB fan
with an error
Check the fuses on the following PCB
according to the service call codes.
SC128
01: Driver relay PCB (F6)
02: Printer control PCB (F10)
03: Printer control PCB (F12)
05: Driver relay PCB (F5)
09: Rail unit relay PCB (F502)
0A: Driver relay PCB (F6)
0B: Driver relay PCB (F5)
0C: Duplex unit PCB (F501)
0D: Driver relay PCB (F6)
0E: Driver relay PCB (F5)
0F: Driver relay PCB (F5)
10: Driver relay PCB (F5)
SC051: Printer control PCB (F12)
Replace the
faulty parts.
