Component Replacement And Adjustment Procedure - Sharp R-5L16 Service Manual

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.
2. Make sure that a definite" click" can be heard when the
microwave oven door is unlatched. (Hold the door in a
closed position with one hand, then push the door open
button with the other, this causes the latch leads to rise,
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 oper-
ating the oven.
Do not operate the oven if any of the following conditions
exist;
Please refer to 'OVEN PARTS, CABINET PARTS, DOOR PARTS', when carrying out any of the following removal procedures:
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.
(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.
1. CARRY OUT 3D CHECKS
2. Disconnect the filament leads of the high voltage
transformer from high voltage capacitor and the
magnetron.
3. Disconnect the H.V. wire A from the high voltage
1. CARRY OUT 3D CHECKS
2. Remove the air separate duct B 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 this one (1 ) screw holding the chassis support
5. Remove the one (1) screw holding the chassis support to
the oven back plate.
OUTER CASE REMOVAL
HIGH VOLTAGE COMPONENTS REMOVAL
HIGH VOLTAGE TRANSFORMER REMOVAL
MAGNETRON REMOVAL
15
1. Door does not close firmly.
2. Door hinge, support or latch hook is damaged.
3. The door gasket or seal or 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.
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 CAPACI-
TOR BEFORE TOUCHING ANY OVEN
COMPONENT OR WIRING.
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 CAPACI-
TOR HOLDER WITH
SCREW.
transformer
4. Remove the two (2) screws and one (1) washer holding
the transformer to base plate.
5. Remove the transformer.
6. Now, the high voltage transformer is free.
6. Remove the one (1) screw holding the chassis support to
the magnetron.
7. Unclip the noise unit from the fan duct and lift the chassis
support.
8. Unclip the air separator duct from the fan duct and
remove the air separator duct to the magnetron.
9. Move the air intake duct to left
10.Remove the air deflector from the magnetron.
R-5L16
AN EARTHING