Sharp R-930AW Magnetron Removal, High Voltage Rectifier Assembly Removal, Re-install

R-930AK

R-930AW

transformer.

5.Disconnect wire leads from the transformer.

6.Remove two (2) screws holding the transformer to the base cabinet.

Re-install

1.Rest the transformer on the base cabinet with its primary terminals toward rear cabinet.

2.Insert the two edges of the transformer into two metal tabs of the base cabinet.

3.Make sure the transformer is mounted correctly to the corners underneath those tabs.

4.After re-installing the transformer, secure the transformer

with two screws to the base cabinet, one is with outer tooth washer and the other is without outer-tooth washer.

5.Re-connect the wire leads (primary and high voltage) and high voltage lead to the transformer and filament leads of transformer to the magnetron and capacitor, referring to the “Pictorial Diagram”.

6.Re-install the outer case and check that the oven is operating properly.

NOTE HOT (ORANGE) WIRE MUST BE CONNECTED TO THE POWER TRANSFORMER TERMINAL NEAREST TO THE TRANSFORMER MOUNTING SCREW.

MAGNETRON REMOVAL

1.Disconnect oven from power supply and remove outer case.

2.Discharge the high voltage capacitor. Disconnect filament lead of transformer from magnetron. Disconnect high voltage wire lead from magnetron.

3.Carefully remove four (4) mounting screws hold the magnetron to waveguide, when removing the screws holding the magnetron to prevent it from falling.

4.Remove the magnetron from the unit with care so the magnetron tube should not hit by any metal object around the tube.

CAUTION: WHEN REPLACING THE MAGNETRON, BE SURE THE R.F. GASKET IS IN PLACE AND THE MAGNETRON MOUNTING SCREWS ARE TIGHTENED SECURELY.

HIGH VOLTAGE RECTIFIER ASSEMBLY REMOVAL

1.Disconnect oven from power supply and remove outer case.

2.Discharge the high voltage capacitor.

3.Remove one (1) screw holding the rectifier assembly to the capacitor holder.

4.Disconnect the rectifier assembly from the capacitor and

magnetron.

CAUTION: WHEN REPLACING THE SILICON RECTIFIER ASSEMBLY, THE GROUND SIDE TERMINAL MUST BE SECURED FIRMLY WITH A GROUNDING SCREW.

HIGH VOLTAGE CAPACITOR REMOVAL

1.Disconnect oven from power supply and remove outer case.

2.Discharge the high voltage capacitor.

3.Disconnect the high voltage wire leads and rectifier assembly from high voltage capacitor and magnetron.

4.Disconnect filament lead of transformer from high voltage capacitor.

5.Disconnect high voltage wire lead of capacitor from transformer.

6.Remove one (1) screw and washer holding the rectifier from the capacitor holder.

7.Remove one (1) screw holding the capacitor holder to the rear cabinet.

8.Remove the capacitor from the holder.

POSITIVE LOCK® CONNECTOR (NO-CASE TYPE) REMOVAL

Positive lock® connector

Push the lever of positive lock® connector. Pull down on the positive lock® connector.

Lever

CAUTION: WHEN YOU CONNECTING THE POSITIVE

LOCK® CONNECTORS TO THE TERMINALS,

INSTALL THE POSITIVE LOCK® SO THAT

THE LEVER FACES YOU.

Figure C-2. Positive lock® connector

Terminal

1 Push

2

Pull down

CONVECTION MOTOR REMOVAL

1.Disconnect oven from power supply and remove outer case.

2.Discharge the high voltage capacitor.

3.Disconnect wire leads from the convection motor. Remove the convection fan belt.

4.Remove two (2) screws holding the convection motor mounting angle to the heater duct and base cabinet.

5.Take out the convection motor assembly from the unit. The convection motor assembly is now free.

6.Remove two (2) screws and nuts holding the motor to mounting angle.

7.Remove pulley (M) from the motor shaft. Convection motor is now free.

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