22
R-763 -
WARNING: Avoid possible exposure to microwave energy. Please follow the instructions below before
operating the oven.
1. CARRY OUT
3D CHECKS.
2. Make sure that a definite "click" can be heard when the
microwave oven door is unlatched. (Pull the microwave
oven door open slowly, it is then possible to hear a
"click" as the door switches operate.)
3. Visually check the door and cavity face plate for damage
(dents, cracks, signs of arcing etc.)
Carry out any remedial work that is necessary before
operating the oven.
Do not operate the oven if any of the following conditions
exist:
1. Door does not close firmly.
To remove the outer case, proceed as follows.
1. Disconnect oven from power supply.
2. Open the oven door and wedge it open.
3. Remove the screws from rear and along the side edge
of case.
4. Slide the entire case back about 3cm to free it from
retaining clips on the cavity face plate.
5. Lift the entire case from the oven.
6. Discharge the H.V. capacitor before carrying out
any further work.
7. Do not operate the oven with the outer case removed.
N.B.; Step 1, 2 and 6 form the basis of the
3D checks.
CAUTION: DISCHARGE HIGH VOLTAGE CAPACITOR
BEFORE TOUCHING ANY OVEN
COMPONENTS OR WIRING.
HIGH VOLTAGE COMPONENTS REMOVAL
(HIGH VOLTAGE CAPACITOR AND HIGH VOLTAGE RECTIFIER ASSEMBLY)
To remove the components, proceed as follows.
1. CARRY OUT
3D CHECKS
2. Disconnect all the leads and terminals of high voltage
rectifier assembly from high voltage capacitor.
3. Remove one (1) screw holding earth side terminal of
high voltage rectifier assembly, and remove capacitor
holder.
4. Remove one (1) screw holding capacitor holder to the
oven cavity.
5. Release the capacitor holder from the duct.
6. Remove the capacitor from the capacitor holder.
7. Now high voltage rectifier assembly and capacitor
should be free.
CAUTION: WHEN REPLACING HIGH VOLTAGE
RECTIFIER ASSEMBLY, ENSURE THAT THE
CATHODE (EARTH) CONNECTION IS
SECURELY FIXED TO THE CAPACITOR
HOLDER WITH AN EARTHING SCREW.
POWER TRANSFORMER REMOVAL
1. CARRY OUT 3D CHECKS
2. Disconnect the filament leads and secondary wire of the
power transformer from high voltage capacitor and the
magnetron.
3. Disconnect the main wire harness from the power
transformer.
5. Remove the two (2) screws and one (1) washer holding
the transformer to base plate.
6. Remove the transformer.
7. Now, the power transformer is free.
MAGNETRON REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the air separate duct from the chassis support
and the air intake duct.
3. Disconnect the H.V. wire B and filament lead of the
transformer from the magnetron.
4. Remove the one (1) screw holding the chassis support
to the magnetron.
5. Move the air intake duct to left.
6. Remove the air deflector from the magnetron.
7. Carefully remove four (4) screws holding magnetron to
waveguide, when removing the screws hold the
magnetron to prevent it from falling.
8. Remove the magnetron from the waveguide with care
so that the magnetron antenna is not hit by any metal
object around the antenna.
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
2. Door hinge, support or latch hook is damaged.
3. The door gasket or seal is damaged.
4. The door is bent or warped.
5. There are defective parts in the door interlock system.
6. There are defective parts in the microwave generating
and transmission assembly.
7. There is visible damage to the oven.
Do not operate the oven:
1. Without the RF gasket (Magnetron).
2. If the wave guide or oven cavity are not intact.
3. If the door is not closed.
4. If the outer case (cabinet) is not fitted.
Please refer to ‘OVEN PARTS, CABINET PARTS, DOOR PARTS’, when carrying out any of the following removal procedures:
OUTER CASE REMOVAL
CAUTION: WHEN REPLACING THE MAGNETRON,
BE SURE THE R.F. GASKET IS IN PLACE
AND THE MAGNETRON MOUNTING
SCREWS ARE TIGHTENED SECURELY.
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