Sharp R-995J Service Manual page 31

Convection microwave oven
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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.
1. CARRY OUT 3D CHECKS.
2. Disconnect filament lead of transformer from
magnetron.
3. Disconnect high voltage wire lead from magnetron.
4. Remove the cooling fan assembly refer to "Cooling Fan
Removal"
5. Carefully remove four (4) mounting screws holding the
magnetron and magnetron air guide to waveguide.
When removing the screws hold the magnetron and
(High Voltage Capacitor and High Voltage Rectifier Assembly)
To remove the components, proceed as follows.
1. CARRY OUT 3D CHECKS.
2. Remove one (1) screw holding capacitor holder to rear
cabinet.
3. Remove one (1) screw holding earth side terminal of
high voltage rectifier assembly, and remove capacitor
holder.
4. Disconnect all the leads and terminals of high voltage
1. CARRY OUT 3D CHECKS.
2. Pull the wire leads from the oven lamp socket by
pushing the terminal hole of the oven lamp socket
with the flat type small screw driver.
3. Lift up the tab of oven lamp mounting plate holding
the oven lamp socket.
4. Slide the oven lamp socket left-ward.
5. Now, the oven lamp socket is free.
Pushing the lever of positive lock
®
Pull out the positive lock
CAUTION: WHEN YOU (SERVICE ENGINEERS) CON-
NECT THE POSITIVE LOCK
TO THE TERMINALS, CONNECT THE POSI-
®
TIVE LOCK
YOU (SERVICE ENGINEERS).
CONTROL PANEL ASSEMBLY AND CONTROL UNIT REMOVAL
To remove the control panel, proceed as follows:
1. CARRY OUT 3D CHECKS.
2. Disconnect connector CN-A, CN-E, CN-B, CN-F, TAB1,
TAB2 and TAB3 from the control unit.
3. Remove one (1) screw holding the control panel to the
panel back angle.
4. Lift up and pull the control panel forward.
Replacement of individual component is as follows:
MAGNETRON REMOVAL
HIGH VOLTAGE COMPONENTS REMOVAL
OVEN LAMP SOCKET REMOVAL
POSITIVE LOCK
®
connector
connector
®
CONNECTORS
SO THAT THE LEVER FACE
NOTE; LIVE (ORANGE) WIRE MUST BE CONNECTED
TO THE CABINET-SIDE OF THE POWER
TRANSFORMER.
magnetron air guide to prevent it from falling.
6. Remove the magnetron from the waveguide with care
so the magnetron antenna should 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.
rectifier assembly from high voltage capacitor.
5. Now, high voltage rectifier assembly and high voltage
capacitor should be free.
CAUTION: WHEN REPLACING HIGH VOLTAGE REC-
TIFIER ASSEMBLY, ENSURE THAT THE
CATHODE (EARTH) CONNECTION IS SE-
CURELY FIXED TO THE CAPACITOR
HOLDER WITH AN EARTHING SCREW.
Wire lead
Figure C-1 Oven lamp socket
®
CONNECTOR REMOVAL
Figure C-2 Positive lock
CONTROL UNIT AND KEY UNIT
5. Disconnect the wire connector from the control unit.
6. Remove the three (3) screws holding the control unit to
the panel frame.
7. Lift up the control unit and disconnect the key connector
from the control unit.
8. Now, the control unit and frame assembly are separated.
29
Oven lamp
socket
Terminal
Terminal hole
Flat type small
screw driver
Terminal
Positive lock®
connector
1
Push
Lever
2
Pull down
®
connector
R-995J

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