Magnetron Removal; Control Panel Assembly Removal - Sharp R-350J Service Manual

4. Disconnect the filament lead (short one) of the power
transformer from the high voltage capacitor.
5. Remove the one (1) screw holding capacitor holder to bottom
plate.
6. Remove one (1) screw holding high voltage rectifier assembly
to capacitor holder.
7. Disconnect rectifier terminal from capacitor.
High voltage rectifier assembly is now free.
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
magnetron.
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.
POSITIVE LOCK
1
. CARRY OUT 3D CHECKS.
2. Push the lever of positive lock
3. Pull down on the positive lock
CAUTION: WHEN CONNECTING THE POSITIVE LOCK
CONNECTORS TO THE TERMINALS, CONNECT
THE POSITIVE LOCK
FACES YOU.
1. CARRY OUT 3D CHECKS.
2. Disconnect the wire leads from control unit.
3. Remove the one (1) screw holding the control panel
1. CARRY OUT 3D CHECKS.
2. Remove the control panel assembly, referring to chapter of

CONTROL PANEL ASSEMBLY REMOVAL.

3. Disconnect the wire leads and the connectors from the power
unit of the control unit assembly.
4. Disconnect the flat ribbon cable from the connector CN-G on
the CPU unit of the control unit assembly.
5. Remove the three (3) screws holding the power unit of the
control unit assembly to the control panel frame.
6. Remove the two (2) screws holding the LCD holder to the
control panel frame.
7. Release the LCD holder from the two (2) tabs of the control
panel frame.

MAGNETRON REMOVAL

®
CONNECTOR (NO-CASE TYPE) REMOVAL
®
connector.
® connector.
®
® SO THAT THE LEVER
CONTROL PANEL ASSEMBLY REMOVAL
CONTROL UNIT ASSEMBLY REMOVAL
8. Disconnect the high voltage fuse from the capacitor. The high
voltage fuse is now free.
9. Remove capacitor holder. Capacitor is now free.
CAUTION: WHEN REPLACING HIGH VOLTAGE RECTIFIER
AND HIGH VOLTAGE CAPACITOR, GROUND
SIDE TERMINAL OF THE HIGH VOLTAGE REC-
TIFIER MUST BE SECURED FIRMLY WITH A
GROUNDING SCREW.
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, BE SURE
THE R.F. GASKET IS IN PLACE AND MOUNTING
SCREWS ARE TIGHTENED SECURELY.
Positive lock®
connector
Lever
Figure C-1. Positive lock
assembly to the oven flange.
4. Slide the control panel assembly upward and remove it.
5. Now, individual components can be removed.
8. Remove the LCD holder (with the CPU unit) from the control
panel frame.
9. Release the power unit from the one tab of the control panel
frame.
10. Now, the control unit assembly is free.
tor.
NOTE: 1. Before attaching a new key unit, wipe off remaining
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 soft cloth not to scratch.
19
R-350J
Terminal
1
Push
2
Pull down
® connector