R-7500AT
39
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
R1900J
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
[1] WARNINGS
Please refer to “OVEN PARTS, CABINET PARTS, CONTROL PANEL PARTS,
DOOR PARTS”, when carrying out any of the following removal procedures:
Microwave ovens contain circuitry capable of producing very high voltage and current, contact with following parts may result
in severe, possibly fatal, electric shock.
(Example)
Inverter unit, High Voltage Harness etc..
WARNING:
Avoid possible exposure to microwave energy. Please follow the instructions below before
operating the oven.
WARNING AGAINST HIGH VOLTAGE:
1. Disconnect the power supply cord.
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 pull the door handle
lever 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 operat-
ing the oven.
Do not operate the oven if any of the following conditions exist;
1. Door does not close firmly.
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.
To prevent an electric shock, take the following precau-
tions.
1. Before wiring,
1) Disconnect the power supply cord.
2) Open the door block it open.
3) Wait for 60 seconds to discharge the high voltage
capacitors of the inveter units.
2. Don't let the wire leads touch to the following parts;
1) High voltage parts:
Magnetrons, inverter units and High voltage wire.
2) Hot parts:
Magnetrons, and inverter units.
WARNING FOR WIRING
3) Sharp edge:
Bottom plate, Oven cavity, Waveguide flange Chassis
support and other metallic plate.
4) Movable parts (to prevent a fault)
Blower fan blade, Blower fan motor, Switches, Switch
levers, Antenna motor and antennas.
3. Do not catch the wire leads in the outer case cabinet.
4. Insert the positive lock connector until its pin is locked and
make sure that the wire leads do not come off even if the
wire leads are pulled.
5. To prevent an error function, connect the wire leads
correctly, referring to the Pictorial Diagram.
[2] NECESSARY TOOLS
Screw driver
Long shaft screw driver(The length of a shaft is 25cm or more.)
Needle nose pliers
Nut driver(opposite side 7mm)
Bushing pliers
Double suction lifter(to remove oven tray)
Nut driver(opposite side 8mm)
