Component Replacement And Adjustment Procedure; Pictorial Diagram - Sharp R-340A Service Manual

R-340A

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
operating the oven.
Do not operate the oven if any of the following conditions
exist;
Please refer to 'OVEN PARTS, CABINET PARTS, CONTROL PANEL PARTS, DOOR PARTS', when carrying out any
of the following removal procedures:
To prevent an electric shock, take the following
manners.
1. Before wiring,
1) Disconnect the power supply.
2) Open the door and wedge the door open.
3) Discharge the high voltage capacitor and wait for
60 seconds.
2. Don't let the wire leads touch to the following parts;
1) High voltage parts:
Magnetron, High voltage transformer, High
voltage capacitor and High voltage rectifier
assembly.
2) Hot parts:
Oven lamp, Magnetron, High voltage transformer
To remove the components, procedure as follows.
1. Disconnect oven from power supply.
2. Remove four(4) screws from rear and one (1) screw
along the right side edge of case.
3. Slide the entire case back out about 1 inch(3 cm) to free
1. CARRY OUT 3D CHECKS.
2. Disconnect wire leads from power transformer,
magnetron and capacitor terminals.
3. Remove four (4) screws holding transformer to bottom
plate right.
4. Remove transformer from bottom plate right.
Re-install
1. Rest transformer on the bottom plate right with its
primary terminals toward the oven face plate.
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
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.
WARNING FOR WIRING
3. Do not catch the wire leads in the outer case cabinet.
4. Insert the positive lock connector certainly until its
5. To prevent an error function, connect the wire leads
OUTER CASE REMOVAL
4. Lift entire case from the unit.
CAUTION: DISCONNECT OVEN FROM POWER SUP-
POWER TRANSFORMER REMOVAL
2. Secure transformer with four screws to bottom plate
3. Re-connect wire leads (primary and high voltage) to
4. Re-install outer case and check that oven is operating
18
and transmission assembly.
and Oven cavity.
3) Sharp edge:
Bottom plate, Oven cavity, Weveguide flange,
Chassis support and other metallic plate.
4) Movable parts (to prevent a fault)
Fan blade, Fan motor, Switch, Switch lever,
Open button.
pin is locked. And make sure that the wire leads
should not come off even if the wire leads is pulled.
correctly, referring to the Pictorial Diagram.
it from retaining clips on the cavity face plate.
PLY BEFORE REMOVING OUTER CASE.
right.
power transformer and filament leads of transformer to
magnetron and high voltage capacitor. Refer to

"PICTORIAL DIAGRAM".

properly.