Sharp R-380D, Service Manual

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R-380D
22
from the noise filter.
4. Disconnect the high voltage fuse from the power
transformer.
5. Disconnect filament lead of the power transformer from
the high voltage capacitor.
6. Disconnect high voltage wire of the high voltage rectifier
assembly from the magnetron.
7. Remove one (1) screw holding capacitor holder to the
oven cavity rear plate.
8. Remove one (1) screw holding high voltage rectifier
assembly to capacitor holder.
9. Disconnect rectifier terminal from capacitor.
Now, the high voltage rectifier assembly is free.
10.Disconnect high voltage fuse from capacitor.
Now, the high voltage fuse is free.
11.Remove the high voltage capacitor from the capacitor
holder. Now, the high voltage capacitor is free.
CAUTION: WHEN REPLACING HIGH VOLTAGE
RECTIFIER AND HIGH VOLTAGE CAPACITOR,
GROUND SIDE TERMINAL OF THE HIGH VOLTAGE
RECTIFIER MUST BE SECURED FIRMLY WITH A
GROUNDING SCREW.
MAGNETRON REMOVAL
Removal
1. CARRY OUT 3D CHECKS.
2. Disconnect wire leads from magnetron.
3. Remove the five (5) screws holding chassis support
to oven cavity front plate, oven cavity rear plate,
magnetron and fan duct.
4. Remove the chassis support from oven.
5. Carefully remove the four (4) screws holding magnetron
to waveguide flange.
6. Lift up magnetron with care so that magnetron antenna
is not hit by any metal object around antenna.
7. Remove the two (2) screws holding the magnetron
duct to the magnetron.
8. Remove the magnetron duct from the magnetron.
9. Now, the magnetron is free.
Re-install
1. Re-install the magnetron duct to the magnetron with
the two (2) screws.
2. Re-install the magnetron to waveguide flange with the
four (4) screws.
3. Insert the two (2) tabs of the chassis support to the oven
cavity front plate and back plate.
4. Re-install the chassis support to oven cavity front
plate, oven cavity rear plate, magnetron and fan duct
with the five (5) screws.
5. Reconnect the wire leads to the magnetron. Refer to
"PICTORIAL DIAGRAM".
6. Re-install 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.
1. CARRY OUT 3D CHECKS.
2. Pushing the lever of positive lock
® connector.
3. Pull out the positive lock ® connector.
CAUTION: WHEN YOU (SERVICE ENGINEERS) CON-
NECT THE POSITIVE LOCK ® CONNECTORS
TO THE TERMINALS, CONNECT THE POSI-
TIVE LOCK
® SO THAT THE LEVER FACE
YOU (SERVICE ENGINEERS).
POSITIVE LOCK ® CONNECTOR REMOVAL
Figure C-1. Positive lock
®
connector
1. Open covers of the terminal insulator by using small flat
type screw driver.
2. Remove the receptacle from the terminal insulator.
3. Now, the terminal insulator is free.
Installation
1. Insert the receptacle into terminal insulator.
2. Close covers of the terminal insulator, as shown
illustlated below.
TERMINAL INSULATOR REPLACEMENT
RECEPTACLE
COVERS
Terminal
insulator
Flat type
screw driver
Terminal
Push
Pull down
1
2
Lever
Positive lock ®
connector
CONTROL PANEL ASSEMBLY REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect the wire leads from panel components.
3. Remove the one (1) screw holding the control panel
assembly to the oven flange.
4. Slide the control panel assembly upward and remove it.
5. Now, individual components can be removed.
NOTE: 1. Before attaching a new key unit, wipe off
remaining adhesive on the control panel frame