Sharp R-27STM Service Manual page 15

1. CARRY OUT 3D CHECKS.
2. Disconnect the wire leads (main wire harness and H. V.
fuse) from high voltage transformer.
3. Disconnect the filament lead of high voltage transformer
from the magnetron.
Disconnect the filament lead of the high voltage transformer
4.
HIGH VOLTAGE RECTIFIER ASSEMBLY, HIGH VOLTAGE FUSE AND HIGH VOLTAGE CAPACITOR REMOVAL
To remove the components, proceed as follows.
1. CARRY OUT 3D CHECKS.
2. Disconnect the H. V. fuse from the high voltage transformer.
Disconnect the H. V. wire of the H. V. rectifier assembly from
3.
the magnetron.
Disconnect the filament lead of the high voltage transformer
4.
from the H. V. capacitor.
5. Remove one (1) screw holding capacitor holder to the oven
cavity back plate.
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 recti -
REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect the wire leads from the magnetron.
3. Remove the two (2) screws holding the air duct to the oven
cavity.
4. Release the air duct from the oven cavity.
5. Carefully remove the four (4) screws holding the magnetron
to the waveguide flange.
6. Lift up magnetron with care so that the magnetron antenna
is not hit by any metal object around antenna.
7. Now, the magnetron is free.
1. CARRY OUT 3D CHECKS.
Push the lever of positive lock, connector.
2.
Pull down on the positive lock, connector.
3.
CAUTION: WHEN CONNECTING THE POSITIVE LOCK, CON -
NECTORS TO THE TERMINALS, CONNECT THE
POSITIVE LOCK, SO THAT THE LEVER FACES
YOU.
REMOVAL
1. Disconnect the power supply cord.
2. Remove turntable and turntable support from oven cavity.
Lay the oven on it's backside. Remove the turntable motor
3.
cover by snipping off the material in four corners.
R27STM.indd 15
HIGH VOLTAGE TRANSFORMER REMOVAL
MAGNETRON REMOVAL
POSITIVE LOCK CONNECTOR (NO-CASE TYPE) REMOVAL
TURNTABLE MOTOR REMOVAL
from high voltage capacitor.
5. Remove the two (2) screws holding the transformer to bot -
tom plate from below.
6. Remove the two (2) screws holding the transformer to bot -
tom plate from above.
7. Remove the transformer.
fier assembly from high voltage capacitor.
8. Disconnect the H. V. fuse from the high voltage capacitor.
Now H. V. rectifier assembly, H. V. fuse and H. V. capacitor
9.
should be free.
CAUTION: WHEN REPLACING HIGH VOLTAGE RECTI -
FIER ASSEMBLY, ENSURE THAT THE CATHODE
(EARTH) CONNECTION IS SECURELY FIXED TO
THE CAPACITOR HOLDER WITH AN EARTHING
SCREW.
CAUTION: DO NOT REPLACE ONLY HIGH VOLTAGE REC -
TIFIER. WHEN REPLACING IT, REPLACE HIGH
VOLTAGE RECTIFIER ASSEMBLY.
REINSTALLATION
1. Reinstall the magnetron to the waveguide flange with the
four (4) screws.
2. Reinstall the air duct to the oven cavity with the two (2)
screws.
Reconnect the wire leads to the magnetron. Refer to "PIC -
3.
TORIAL DIAGRAM".
Reinstall the outer case and check that the oven is operating
4.
properly.
CAUTION: WHEN REPLACING THE MAGNETRON, BE SURE
THE R. F. GASKET IS IN PLACE AND THE MAGN -
ETRON MOUNTING SCREWS ARE TIGHTENED
SECURELY.
Positive lock¨
connector
Lever
Figure C-1. Positive lock, connector
4. Where the corners have been snipped off bend corner areas
flat. No sharp edges must be evident after removal of the
turntable motor cover.
Disconnect wire leads from turntable motor. (See "Positive
5.
lock connector removal")
15
R-27STM
Terminal
1
Push
2
Pull down
11/3/08 2:04:27 PM