Sharp R-677W Service Manual page 25

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
1. CARRY OUT 3D CHECKS.
2. Disconnect the filament leads of high voltage trans-
former from high voltage capacitor and the magnetron.
3. Disconnect the H.V. wire A from the high voltage
transformer.
4. Disconnect the main wire harness from the high volt-
age transformer.
1. CARRY OUT 3D CHECKS.
2. Disconnect the H.V. wire B and filament lead of the
transformer from the magnetron.
3. Remove the one (1) screw holding the chassis support
to the magnetron.
4. Remove the one (1) screw holding the chassis support
to the oven cavity front flange.
5. Remove the chassis support from the power angle and
move to the right hand side.
6. Release the tabs of air intake duct from the oven cavity.
7. Move the air intake duct to the left.
1. CARRY OUT 3D CHECKS.
2. Disconnect the main wire harness and the stop switch
harness from the control unit.
3. Remove the one (1) screw holding the control panel to
the oven cavity front flange.
4. Remove the control panel assembly from the oven.
5. Disconnect the cable from the connector CN-C.
Removal
1. Disconnect the oven from the power supply.
2. Remove the turntable from the oven cavity.
3. Turn the oven over.
4. Cut the four (4) bridges holding the turntable motor
cover to the base plate with cutting pliers as shown in
Figure C-1(a).
CAUTION: DO NOT DROP THE TURNTABLE MOTOR
COVER INTO THE OVEN AFTER CUTTING
THE BRIDGES. BECAUSE IT WILL DAM-
AGE THE WIRE LEADS OF THE MOTOR
AND IS ALSO DIFFICULT TO REMOVE
FROM THE OVEN.
5. Remove the turntable motor cover from the power
angle.
6. Disconnect the wire leads from the turntable motor.
7. Remove the one (1) screw holding the turntable motor
to the oven cavity.
8. Bend locating tab to allow removal of turntable motor.
9. Remove the turntable motor from the oven cavity
taking care not to drop or lose the turntable motor
coupling.
10.Now, the turntable motor is free.
Re-install
1. Remove the any sharp edges on the turntable motor
cover and the base plate with the cutting pliers.
HIGH VOLTAGE TRANSFORMER REMOVAL
MAGNETRON REMOVAL
CONTROL PANEL ASSEMBLY REMOVAL
TURNTABLE MOTOR REPLACEMENT
R-677 - 25
5. Remove the HVT thermal cut-out from the high voltage
transformer.
6. Remove the four (4) screws holding the transformer to
power angle.
7. Remove the transformer.
8. Now the high voltage transformer is free.
8. Carefully remove two (2) screws holding magnetron to
waveguide, when removing the screws hold the mag-
netron to prevent any damage.
9. Remove the magnetron from the waveguide with care
so the magnetron antenna is not hit by any metal object
around the antenna.
CAUTION: WHEN REPLACING THE MAGNETRON,
BE SURE THE R.F. GASKET IS IN PLACE
AND THE MAGNETRON MOUNTING
SCREWS ARE TIGHTENED SECURELY.
6. Remove the six (6) screws holding the control unit to
the control panel.
7. Remove the control unit from the control panel.
8. Remove the six (6) screws holding the key / jog unit to
the control panel.
9. Remove the key / jog unit from the control panel.
10.Now, the control unit assembly is free.
2. Re-install the turntable motor by locating shaft onto
coupling then fitting it to the oven cavity with (1) one
screw and bending of location tab.
3. Re-connect the wire leads to the turntable motor.
4. Insert the two (2) tabs of the turntable motor cover into
the slits of the power angle as shown in Figure C-1(b).
5. Fasten the turntable motor cover to the power angle
with the screw (LX-CZA030WRE0) as shown in Figure
C-1(b).
Figure C-1(a). Turntable motor cover removal
Bridges
Figure C-1(b). Turntable motor cover re-install
Turntable motor cover
Tabs
Slits
Power angle
...
CONT
Cutting pliers
Bridges
Turntable motor
cover
Screw;
LX-CZA030WRE0