Read Sharp R-246 (serv.man2) Service Manual online
R-246(G)
R-246(SL)
R-246(W)
R-246(SL)
R-246(W)
17
HIGH VOLTAGE COMPONENTS REMOVAL
(HIGH VOLTAGE CAPACITOR, HIGH VOLTAGE RECTIFIER ASSEMBLY AND H.V. FUSE)
To remove the components, proceed as follows.
1. CARRY OUT 3D CHECKS.
2. Disconnect the H.V. fuse from the high voltage trans-
1. CARRY OUT 3D CHECKS.
2. Disconnect the H.V. fuse from the high voltage trans-
former.
3. Disconnect the H.V. wire of the H.V. rectifier assembly
from the magnetron.
4. Remove one (1) screw holding capacitor holder to the
oven cavity back plate.
5. Disconnect the filament lead of the high voltage trans-
former from the H.V. capacitor.
6. Remove one (1) screw holding earth side terminal of high
voltage rectifier assembly, and remove capacitor holder.
7. Disconnect all the leads and terminals of high voltage
rectifier assembly from high voltage capacitor.
8. Disconnect the H.V. fuse from the high voltage capacitor.
9. Now H.V. rectifier assembly, H.V. fuse and H.V. ca-
9. Now H.V. rectifier assembly, H.V. fuse and H.V. ca-
pacitor should be free.
CAUTION: WHEN REPLACING HIGH VOLTAGE
RECTIFIER ASSEMBLY, ENSURE THAT
THE CATHODE (EARTH) CONNECTION
IS SECURELY FIXED TO THE CAPACI-
TOR HOLDER WITH AN EARTHING
SCREW.
THE CATHODE (EARTH) CONNECTION
IS SECURELY FIXED TO THE CAPACI-
TOR HOLDER WITH AN EARTHING
SCREW.
CAUTION: DO NOT REPLACE ONLY HIGH VOLT-
AGE RECTIFIER. WHEN REPLACING IT,
REPLACE HIGH VOLTAGE RECTIFIER
ASSEMBLY.
REPLACE HIGH VOLTAGE RECTIFIER
ASSEMBLY.
Removal
1. CARRY OUT 3D CHECKS.
2. Disconnect the wire leads from the magnetron.
3. Carefully remove the three (3) screws holding the
1. CARRY OUT 3D CHECKS.
2. Disconnect the wire leads from the magnetron.
3. Carefully remove the three (3) screws holding the
magnetron to the waveguide flange.
4. Lift up magnetron with care so that the magnetron
antenna is not hit by any metal object around antenna.
5. Now, the magnetron is free.
Reinstall
1. Reinstall the magnetron to the waveguide flange with
Reinstall
1. Reinstall the magnetron to the waveguide flange with
three (3) screws.
2. Reconnect the wire leads to the magnetron. Refer to
"PICTORIAL DIAGRAM".
3. Reinstall the outer case and check that the oven is
operating properly.
CAUTION: WHEN REPLACING THE MAGNETRON,
BE SURE THE R.F. GASKET IS IN PLACE
AND THE MAGNETRON MOUNTING
SCREWS ARE TIGHTENED SECURELY.
AND THE MAGNETRON MOUNTING
SCREWS ARE TIGHTENED SECURELY.
MAGNETRON REPLACEMENT
1. CARRY OUT 3D CHECKS.
2. Push the lever of positive lock
2. Push the lever of positive lock
®
connector.
3. Pull down on the positive lock
®
connector.
CAUTION: WHEN CONNECTING THE POSITIVE
LOCK
®
CONNECTORS TO THE TERMI-
NALS, INSTALL THE POSITIVE LOCK
®
SO
THAT THE LEVER FACES YOU.
POSITIVE LOCK
®
CONNECTOR (NO-CASE TYPE) REMOVAL
Terminal
Push
Pull down
1
2
Lever
Positive lock®
connector
Figure C-1. Positive lock
®
connector
Removal
1. Disconnect the oven from the power supply.
2. Remove the turntable and turntable support from the
2. Remove the turntable and turntable support from the
oven cavity.
3. Turn the oven over.
4. Cut the four (4) bridges holding the turntable motor
4. Cut the four (4) bridges holding the turntable motor
cover to the bottom plate with the cutting pliers as
shown in Figure C-2.
shown in Figure C-2.
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 IT IS DIFFICULT TO REMOVE IT OUT
OF THE OVEN.
THE BRIDGES. BECAUSE IT WILL DAM-
AGE THE WIRE LEADS OF THE MOTOR
AND IT IS DIFFICULT TO REMOVE IT OUT
OF THE OVEN.
TURNTABLE MOTOR REPLACEMENT
5. Remove the turntable motor cover from the bottom
plate.
6. Disconnect the wire leads from the turntable motor.
7. Remove the single (1) screw holding the turntable
7. Remove the single (1) screw holding the turntable
motor to the oven cavity.
8. Remove the turntable motor from the oven cavity.
9. Remove the O-ring and washer from the turntable
9. Remove the O-ring and washer from the turntable
motor.
10.Now, the turntable motor is free.
Reinstall
1. Remove the any sharp edges on the turntable motor
cover and the bottom plate with the cutting pliers.
2. Reinstall the O-ring.
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