R-21ATP - Sharp Home Appliance Service Manual (repair manual). Page 23

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5. Disconnect high voltage fuse and terminal of high

voltage rectifier assembly from the high voltage ca-
pacitor.

6. Now, the high voltage rectifier assembly should be free.
7. Disconnect the high voltage fuse from the high voltage

transformer.

8. Now, the high voltage fuse is free.
9. Remove one (1) screw holding the capacitor holder to

the oven cavity rear plate.

10.Remove one (1) screw holding the fan duct to the oven

cavity rear plate.

11.Release the capacitor holder from the fan duct.
12.Remove the capacitor from the capacitor holder.
13.Now, the 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 AND OVEN CAVITY REAR
PLATE WITH AN EARTHING SCREW.

1. CARRY OUT 3D CHECKS.
2. Disconnect the high voltage wire of the high voltage

rectifier assembly and filament lead of the transformer
from the magnetron.

3. Remove the one (1) screw holding the air guide to the

magnetron and remove the air guide.

4. Remove the one (1) screw holding the chassis support

to the magnetron.

5. Carefully remove four (4) screws holding magnetron to

waveguide, when removing the screws hold the mag-
netron to prevent it from falling.

6. Remove the magnetron from the waveguide with care

so the magnetron antenna is not hit by any metal object
around the antenna.

CAUTION: WHEN REPLACING THE MAGNETRON,

BE SURE THE R.F. GASKET IS IN PLACE
AND THE MAGNETRON MOUNTING
SCREWS ARE TIGHTENED SECURELY.

CONTROL PANEL ASSEMBLY
1. CARRY OUT 3D CHECKS.
2. Disconnect the main wire harness from the control unit.
3. Remove the one (1) screw holding the control panel

assembly to the oven cavity front plate.

4. Lift up the control panel assembly.
5. Now, the control panel assembly is free.

CONTROL UNIT
6. Disconnect the flat ribbon cable from the connector CN-G.
7. Remove the six (6) screws holding the control unit to

the control panel frame.

8. Release the two (2) tabs of the control panel frame

holding the control unit to the control panel frame.

9. Now, the control unit is free.

NOTE: 1. Before attaching a new key unit, wipe off  re-

maining adhesive on the control panel frame
surfaces completely with a soft cloth soaked in
alcohol.

2. When attaching the key unit to the control panel

frame, adjust the upper edge and right edge of
the key unit to the correct position of  control
panel frame.

3. Stick the key unit firmly to the control panel

frame by rubbing with a soft cloth so not to
cause scratches.

1. CARRY OUT 3D CHECKS.
2. Screw the oven lamp  from the oven lamp socket off.
3. Now, the oven lamp is free.
4. Lift up the oven lamp socket from air intake duct.
5. Pull the wire leads from the oven lamp socket by

pushing the terminal hole of the oven lamp socket with
the small flat type screw driver.

6. Now, the oven lamp socket is free.

1. CARRY OUT 3D CHECKS.
2. Push the lever of positive lock

®

 connector.

3. Pull down on the positive lock

®

 connector.

CAUTION: WHEN CONNECTING THE POSITIVE

LOCK

®

 CONNECTORS TO THE TERMI-

NALS, INSTALL THE POSITIVE LOCK

®

CONNECTOR SO THAT THE LEVER
FACES YOU

Figure C-2 Positive lock

Terminal

Push

Pull down

1

2

Lever

Positive lock®

connector

Oven lamp
socket

Terminal

Wire lead

Terminal hole

Flat type small
screw driver