Sharp R-90GCH Service Manual page 31

1. Open covers of the terminal insulator by using small
flat type screw driver.
2. Remove the receptacle from the terminal insulator.
3. Now, the terminal insulator is free.
Terminal
insulator
Removal
1. CARRY OUT 3D CHECKS.
2. Remove the one (1) screw holding the green/ yellow
wire of the power supply cord to the bottom plate.
3. Disconnect the blue and brown wire leads of the power
supply cord from the noise filter.
4. Nip the cord bushing with bushing pliers and release it
from the hole of the back plate.
5. Remove the cord bushing from the power supply cord,
and the power supply cord from the back plate.
6. Now, the power supply cord is free.
Reinstall
1. Reinstall the cord bushing to the power supply cord.
2. Insert the power supply cord with the cord bushing into
the hole of the back plate.
3. Hold the green/ yellow wire of the power supply cord to
the bottom plate with the one (1) screw.
4. Reconnect the blue and brown wire leads of the power
supply cord to noise filter, referring to the pictorial
diagram.
1. CARRY OUT 3D CHECKS.
2. Remove the one (1) screw holding the green/ yellow
wire of the power supply cord to the bottom plate.
3. Disconnect the blue and brown wire leads wire of the
power supply cord from the noise filter.
4. Remove the three (3) screws holding the back plate to
1. CARRY OUT 3D CHECKS.
2. Remove the back plate from the oven, referring to
"BACK PLATE REMOVAL".
3. Disconnect the main wire harness from the high voltage
transformer.
4. Disconnect the filament leads of the high voltage
transformer from the high voltage capacitor and the
magnetron.
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 wire of the high voltage
transformer from the magnetron.
5. Remove the two (2) screws holding the magnetron
TERMINAL INSULATOR REPLACEMENT
Flat type
screw driver
POWER SUPPLY CORD REPLACEMENT
BACK PLATE REMOVAL
HIGH VOLTAGE TRANSFORMER REMOVAL
MAGNETRON REMOVAL
Installation
1. Insert the receptacle into terminal insulator.
2. Close covers of the terminal insulator, as shown
illustrated below
5. Not to be caught by the outer case cabinet, pass the
green/ yellow wire of the power supply cord under the
high voltage capacitor.
6. Reinstall the outer case cabinet and check that the
oven is operating properly.
Power supply cord
Back plate
Blue wire
Brown wire
Noise filter
Bottom plate
Figure C-1. Power supply cord replacement
the bottom plate.
5. Remove the two (2) screws holding the right and left
chassis supports to the back plate.
6. Release the tabs of the chassis supports from the back
plate.
7. Now, the back plate with the back plate is free.
5. Disconnect the high voltage fuse from the high voltage
transformer.
6. Remove the four (4) screws holding the transformer
mounting angle to the bottom plate from under the
bottom plate.
7. Remove the four (4) screws holding the high voltage
transformer to the transformer mounting angle.
8. Now, the high voltage transformer is free.
guide to the magnetron and remove it.
6. Disconnect the wire leads and the connector from the
solid-state relay.
7. Release the main wire harness from the hole of the
magnetron separator and the hook of the fan motor.
8. Remove the three (3) screws holding the magnetron
separator to the bottom plate and the thermal cover back.
9. Remove the magnetron separator from the oven.
29
Covers
Receptacle
Cord bushing
High voltage
capacitor
Green/ Yellow
wire
Screw
R-90GCH