Component Replacement; Adjustment Procedure; Outer Case Removal - Sharp R-3A53 Service Manual

R-3A53
R-3A530
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
WARNING: Avoid possible exposure to microwave energy. Please follow the instructions below
before operating the oven.
1. CARRY OUT 3D CHECKS.
I. Door does not close firmly.
2. Make sure that a definite "click" can be heard when
2. Door hinge, support or latch hook is damaged.
the microwave oven door is unlatched. (Hold the
3. The door gasket or seal is damaged.
door in a closed position with one hand, then push
4. The door is bent or warped.
the door open button with the other, this causes the
5. There are defective parts in the door interlock sys-
latch heads to rise, it is then possible to hear a
tern.
"click" as the door switches operate.)
6. There are defective parts in the microwave generat-
3. Visually check the door and cavity face plate for
ing and transmission assembly.
damage (dents, cracks, signs of arcing etc.).
7. There is visible damage to the oven.
Carry out any remedial work that is necessary before
operating the oven.
Do not operate the oven:
1. Without the RF gasket (Magnetron).
2. If the wave guide or oven cavity are not intact.
Do not operate the oven if any of the following con-
ditions exist;
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
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.
Note: For Australian model
Remove the two (2) LHSTIX screws from the
rear of the outer case cabinet, using special
driver LHSTIX (LR-4).
LHSilX SCREW DRIVER
(SIZE LH-4)
LHiTlX SCREW
Note: When securing or loosening the LHSTIX screw,
LHSTIX (LR-4) TYPE screw driver should be
used.
4. Slide the entire case back about 1 inch (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 carring out any
further work.
7. Do not operate the oven with the outer case re-
moved.
N.B.; Step I,2 and 6 form the basis of the 3D checks.
CAUTION: DISCHARGE HIGH VO LTAG E
CAPACITOR BEFORE TOUCHING ANY
OVEN COMPONENTS OR WIRING.
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