Sharp R-953(SL)M Service Manual page 28

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
7. Disconnect the high voltage rectifier assembly from the
high voltage capacitor.
8. Now, the high voltage rectifier assembly and the high
voltage capacitor should be free.
1. CARRY OUT 3D CHECKS.
2. Disconnect the main wire harness from the high volt-
age transformer.
3. Disconnect the filament leads and high voltage wire of
high voltage transformer from high voltage capacitor
1. CARRY OUT 3D CHECKS.
2. Disconnect the H.V. wire B and filament lead of the
transformer from the magnetron.
3. Carefully remove four (4) screws holding the magnetron
to the waveguide, when removing the screws hold the
magnetron to prevent it from falling.
4. Remove the magnetron from the waveguide with care
so the magnetron antenna is not hit by any metal object
around the antenna.
1. CARRY OUT 3D CHECKS.
2. Disconnect the wire leads and the connectors from the
control unit.
3. Remove the one (1) screw holding the earth wire to the
oven cavity face plate.
4. Lift up the control panel assembly and pull it forward.
Now the control panel assembly is free.
REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the one (1) screw holding the noise filter to the
chassis support.
3. Release the noise filter from the tabs of the fan duct.
4. Remove the four (4) screws holding the chassis sup-
port to the oven cavity front flange, back plate, air
intake duct and the magnetron.
5. Remove the chassis support from the oven cavity.
6. Disconnect the wire leads from the fan motor.
7. Remove the one (1) screw holding the fan duct to the
back plate.
8. Release the tabs of the fan duct from back plate.
9. Remove the fan duct from the oven.
10.Remove the fan blade from the fan motor shaft accord-
ing to the following procedure.
1) Hold the edge of the rotor of the fan motor by using
a pair of groove joint pliers.
CAUTION:
• Make sure that no swarf from the rotor enters
the gap between the rotor & stator of the fan
motor.
• Avoid touch the coil of the fan motor with the
pliers as the coil may become cut or damaged.
• Avoid deforming the bracket whilst using the
HIGH VOLTAGE TRANSFORMER REMOVAL
MAGNETRON REMOVAL
CONTROL PANEL ASSEMBLY REMOVAL
FAN MOTOR REPLACEMENT
R-953/963M - 26
CAUTION: WHEN REPLACING HIGH VOLTAGE
RECTIFIER ASSEMBLY, ENSURE THAT
THE CATHODE (EARTH) CONNECTION
IS SECURELY FIXED TO THE BASE
PLATE THROUGH THE CAPACITOR
HOLDER WITH AN EARTHING SCREW.
and the magnetron.
4. Remove the two (2) screws and one (1) washer holding
the transformer to the base plate.
5. Remove the transformer.
6. Now the high voltage transformer is free.
5. Remove the magnetron guide H from the magnetron.
6. Remove the one (1) screw holding the magnetron
guide V to the magnetron.
7. Now, the magnetron is free.
CAUTION: WHEN REPLACING THE MAGNETRON,
BE SURE THE R.F. GASKET IS IN PLACE
AND THE MAGNETRON MOUNTING
SCREWS ARE TIGHTENED SECURELY.
NOTE:
1. Before attaching a new key unit, wipe off remaining
adhesive on the control panel frame surfaces com-
pletely with a soft cloth soaked in alcohol.
2. When attaching the key unit to the control panel frame,
adjust the upper edge and right edge of the key unit to
the correct position of control panel frame.
3. Stick the key unit firmly to the control panel frame by
rubbing with soft cloth not to scratch.
pliers.
2) Remove the fan blade assembly from the shaft of
the fan motor by pulling and rotating the fan blade
with your hand.
3) Now, the fan blade is free.
CAUTION:
• Do not reuse the removed fan blade as the
fixing hole may be oversize.
11.Remove the two (2) screws holding the fan motor to the
fan duct.
12.Now, the fan motor is free.
INSTALLATION
1. Install the the fan motor to the fan duct with the two (2)
screws and nuts.
2. Install the fan blade to the fan motor shaft according to
the following procedure.
1) Hold the centre of the bracket which supports the
shaft of the fan motor on a flat table.
2) Apply the screw lock tight into the hole (for shaft) of
the fan blade.
3) Install the fan blade to the shaft of fan motor by
pushing the fan blade with a small, light weight,
rubber mallet.