Inverter Unit Replacement; Magnetron Removal - Sharp R-350Y Service Manual

WARNING: RISK OF ELECTRIC SHOCK. DISCHARGE THE HIGH-
VOLTAGE CAPACITORS BEFORE SERVICING.
8. Do not operate the oven with the outer case removed.

[3] INVERTER UNIT REPLACEMENT

1. REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect the main wire harness from the inverter harness.
3. Disconnect the main wire harness from the connector CN-A in the
inverter unit.
4. Disconnect the high voltage wires from the magnetron.
5. Remove the four (4) screws holding the inverter angle to the bottom
plate.
6. Remove the inverter angle with the inverter unit from the bottom
plate.
7. Disconnect the inverter harness from the inverter unit.
8. Disconnect the high voltage wires from the inverter unit.
9. Remove the one (1) screw which earths the inverter unit to the
inverter angle.
10.Remove the two (2) screws holding the inverter unit to the inverter
angle.
11.Remove the inverter unit from the inverter angle.
12.Now, the inverter unit is free.
2. RE-INSTALL
1. Insert the tab of the inverter unit to the slit of the inverter angle, as
shown in the picture "Tab of inverter unit".
2. Hold the inverter unit to the inverter angle with the two (2) screws,
as shown in the picture "Screws for inverter unit".
3. Earth the inverter unit to the inverter angle with one (1) screw, as
shown in the picture "Tab of inverter unit".
4. Connect the inverter harness to the inverter unit, referring to the
pictorial diagram.
5. Connect the high voltage wires to the inverter unit, referring to the
pictorial diagram.
6. Rest the inverter angle with the inverter unit on the bottom plate
with the inverter harness terminal side toward the oven face plate.
7. Secure the inverter angle with four (4) screws to the bottom plate.

[4] MAGNETRON REMOVAL

1. REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect all wire leads from magnetron.
3. Remove the one (1) screw holding the chassis support to the mag-
netron.
4. Release the chassis support from the hole of the oven cavity front
flange.
5. Remove the two (2) screws holding air duct to magnetron and oven
cavity top plate.
6. Remove the air duct from oven.
7. Carefully remove the four (4) screws holding magnetron to
waveguide flange.
8. Remove magnetron with care so that magnetron antenna is not hit
by any metal object around antenna.
9. Now, the magnetron is free.
NOTE: Step 1, 2 and 6 form the basis of the 3D checks.
CAUTION: DISCHARGE HIGH VOLTAGE CAPACITOR BEFORE
TOUCHING ANY OVEN COMPONENTS OR WIRING.
8. Connect the high voltage wires to the magnetron, referring to the
pictorial diagram.
9. Connect the connector of the main wire harness to the connector
CN-A on the inverter unit.
10.Connect the inverter harness to the main wire harness.
11. CARRY OUR 4R CHECKS.
Tab of inverter unit
Inverter angle
Picture of Tab of the inverter unit
Screw for earthing
Picture of Screws of the inverter unit
2. REINSTALLATION
1. Reinstall the magnetron to waveguide flange with the four (4)
screws.
2. Reinstall the air duct to the oven cavity top plate and the magnetron
with two (2) screws.
3. Insert the end of the chassis support into the hole of the oven cavity
front flange.
4. Hold the other end of the chassis support to the magnetron with the
one (1) screw.
5. Reconnect the wire leads to the magnetron. Refer to "PICTORIAL
DIAGRAM".
6. Reinstall outer case and check that the oven is operating properly.
CAUTION: WHEN REPLACING MAGNETRON, BESURE THE R.F.
GASKET IS IN PLACE AND MOUNTING SCREWS ARE
TIGHTENEDSECURELY.
12 – 2
R-350Y(S)
Inverter unit
Screw for earthing
Screws for
holding the
inverter unit