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R-90GCH
10.Carefully remove the four (4) screws holding the
magnetron to the waveguide. When removing the
screws, hold the magnetron to prevent it from falling.
11.Remove the magnetron from the unit with care so the
magnetron tube should not be hit by any metal object
around the tube.
HIGH VOLTAGE CAPACITOR, HIGH VOLTAGE FUSE AND HIGH VOLTAGE RECTIFIER
1. CARRY OUT 3D CHECKS.
2. Remove the back plate from the oven, referring to
"BACK PLATE REMOVAL".
3. Disconnect the high voltage wire of the high voltage
rectifier assembly from the magnetron.
4. Disconnect the filament lead of the high voltage
transformer from the high voltage capacitor.
5. Disconnect the high voltage fuse from the high voltage
transformer.
6. Remove the one (1) screw holding the capacitor holder
to the fan motor mounting angle.
HIGH VOLTAGE TRANSFORMER SIDE
1. CARRY OUT 3D CHECKS.
2. Remove the back plate from the oven, referring to
"BACK PLATE REMOVAL".
3. Remove the one (1) screw holding the capacitor holder
to the fan motor mounting angle. And remove the
capacitor holder from the fan motor mounting angle.
4. Disconnect the wire leads from the fan motor.
5. Remove the four (4) screws holding the fan motor
mounting angle to the bottom plate and the thermal
cover back.
6. Remove the three (3) screws holding the fan motor to
the fan motor mounting angle.
7. Now, the fan motor is free.
SOLID-STATE RELAY (MAGNETRON SIDE) REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the back plate from the oven, referring to
"BACK PLATE REMOVAL".
3. Disconnect the wire leads and the connector from the
solid-state relay.
4. Release the main wire harness from the hole of the
magnetron separator.
5. Remove the three (3) screws holding the magnetron
separator to the bottom plate and the thermal cover
back.
6. Remove the magnetron separator form the oven.
DAMPER MOTOR AND DAMPER SWITCH REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the back plate from the oven, referring to
"BACK PLATE REMOVAL".
3. Remove the one (1) screw holding the right chassis
support to the oven cavity front plate.
4. Disconnect the wire leads from the damper motor.
5. Remove the two (2) screws holding the damper motor
to the motor mounting angle.
CAUTION: WHEN REPLACING THE MAGNETRON, BE
ASSEMBLY REMOVAL
7. Remove the one (1) screw holding the high voltage
rectifier assembly to the capacitor holder.
8. Disconnect the high voltage rectifier assembly and
high voltage fuse from the high voltage capacitor.
11.Now, the high voltage rectifier assembly, high voltage
fuse, and also the high voltage capacitor are free.
CAUTION: WHEN REPLACING HIGH VOLTAGE REC-
FAN MOTOR REMOVAL
MAGNETRON SIDE ONE REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the back plate from the oven, referring to
"BACK PLATE REMOVAL".
3. Disconnect the wire leads from the fan motor.
4. Disconnect the connector of the main wire harness
from the connector of the thermistor.
5. Release the main wire harness from the hole of the
magnetron separator and the hook of the fan motor.
6. Remove the three (3) screws holding the magnetron
separator to the bottom plate and the thermal cover back.
7. Remove the magnetron separator from the oven.
8. Remove the one (1) screw holding the fan motor to the
bottom plate.
9. Now, the fan motor is free.
7. Remove the two (2) screws holding the solid-sate relay
to the magnetron separator.
8. Now, the solid-sate relay is free.
CAUTION : WHEN THE SOLID-STATE RELAY (MAGN-
6. Now, the damper motor is free.
7. Disconnect the wire leads from the damper switch.
8. Remove the two (2) screws holding the motor mounting
angle to the damper duct assembly.
9. Remove the one (1) screw holding the damper switch
to the motor mounting angle.
10.Now, the damper switch is free.
30
SURE THE R.F. GASKET IS IN PLACE AND
THE MAGNETRON MOUNTING SCREWS
ARE TIGHTENED SECURELY.
TIFIER ASSEMBLY, ENSURE THAT THE
CATHODE (EARTH) CONNECTION IS SE-
CURELY FIXED TO THE CAPACITOR
HOLDER WITH AN EARTHING SCREW.
ETRON SIDE ONE OR HEATER DUCT LEFT
SIDE ONE) IS REINSTALLED, APPLY THE
SILICON GREASE ( SHINETSU SILICON
GREASE G746 OF SHINETSU CHEMICAL
CO.,LTD.) TO THE BACK SIDE OF THE
SOLID-STATE RELAY IN A THICKNESS OF
0.3 MM. THIS IS TO PREVENT THE OVER
HEATING OF THE SOLID-STATE RELAY.
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