Mita PointSource Ai 3010, Service Manual

Page: 423 / 478

2AR
3-6-50
Problem Causes Check procedures/corrective measures
Defective inverter
PCB.
Defective scanner
motor PCB.
Broken wire in fix-
ing heater M or S.
Fixing unit thermo-
stat triggered.
Broken fixing unit
thermistor wire.
Dirty sensor part of
the fixing unit ther-
mistor.
Defective engine
PCB.
Broken main
charger wire.
Leaking main
charger housing.
Poor contact of the
high-voltage trans-
former PCB con-
nector terminals.
Defective main
PCB.
Defective engine
PCB.
Defective high-
voltage transformer
PCB.
If the exposure lamp does not turn off when
CN1-5 and CN1-6 on the inverter PCB are
high, replace the inverter PCB.
If CN3-1 and CN3-2 on the scanner motor
PCB are always low, replace the scanner
motor PCB.
Check for continuity across each heater. If
none, replace the heater (see page 3-3-57).
Check for continuity across the thermostat. If
none, remove the cause and replace the
thermostat.
Measure the resistance. If it is
∞ Ω
, replace
the fixing unit thermistor.
Check visually and clean the thermistor sensor
parts.
If fixing heater M/S stays on when CN1-6
and CN1-7 on the engine PCB are high,
replace the engine PCB.
See page 3-6-4.
(18)
The exposure
lamp does not
turn off.
(19)
Fixing heater
M or S does
not turn on
(C620).
(20)
Fixing heater
M or S does
not turn off
(fixing unit
thermostat
triggered;
C630).
(21)
Main charging
is not
performed
(C510).