Read Sharp R-959SLMA (serv.man11) Service Manual online
R959(SL)MA
11 – 2
4. Remove one (1) screw holding earth side terminal of the high volt-
age rectifier assembly to the base plate through the capacitor
holder.
holder.
5. Release the capacitor holder from the base plate.
6. Remove the high voltage capacitor from the capacitor holder.
7. Disconnect the high voltage rectifier assembly from the high volt-
age capacitor.
8. Now, the high voltage rectifier assembly and the high voltage
capacitor should be free.
CAUTION: WHEN REPLACING HIGH VOLTAGE RECTIFIER
ASSEMBLY, ENSURE THAT THE CATHODE (EARTH)
CONNECTION IS SECURELY FIXED TO THE BASE
PLATE THROUGH THE CAPACITOR HOLDER WITH AN
EARTHING SCREW.
CONNECTION IS SECURELY FIXED TO THE BASE
PLATE THROUGH THE CAPACITOR HOLDER WITH AN
EARTHING SCREW.
[4] HIGH VOLTAGE TRANSFORMER REMOVAL
To remove the components, proceed as follows.
1. CARRY OUT 3D CHECKS.
2. Disconnect the main wire harness from the high voltage trans-
former.
3. Disconnect the filament leads and high voltage wire of high voltage
transformer from high voltage capacitor and the magnetron.
4. Remove the two (2) screws holding the transformer to the base
plate.
5. Remove the transformer.
6. Now the high voltage transformer is free.
[5] MAGNETRON REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect the H.V. wire and filament lead of the transformer from
the magnetron.
3. Carefully remove two (2) screws holding the magnetron to the
waveguide, when removing the screws hold the magnetron to pre-
vent it from falling.
vent it from falling.
4. Remove the one (1) screw holding the magnetron to the chassis
support.
5. Remove the magnetron from the waveguide with care so the mag-
netron antenna is not hit by any metal object around the antenna.
6. Now, the magnetron is free.
CAUTION: CAUTION: WHEN REPLACING THE MAGNETRON, BE
SURE THE R.F. GASKET IS IN PLACE AND THE MAG-
NETRON MOUNTING SCREWS ARE TIGHTENED
SECURELY.
NETRON MOUNTING SCREWS ARE TIGHTENED
SECURELY.
[6] CONTROL PANEL ASSEMBLY REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect the wire leads and the connectors from the control unit.
3. Remove the one (1) screw holding the control panel to the oven
cavity face plate.
4. Remove the one (1) screw holding the earth wire to the oven cavity
face plate.
5. Lift up the control panel assembly and pull it forward.
Now the control panel assembly is free.
[7] GRAPHIC SHEET AND MEMBRANE SWITCH REPLACEMENT
1. REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the control panel assembly, referring to chapter of CON-
TROL PANEL ASSEMBLY REMOVAL.
3. Disconnect the ribbon cable of the membrane switch from the con-
nector (CN-G) on the control unit.
4. Remove the five (5) screws holding the control unit to the control
panel frame. And remove the control unit and the power unit.
5. Tear away the graphic sheet from the control panel frame.
6. Tear away the membrane switch from the control panel frame.
2. REINSTALL
1. Remove remaining adhesive on the control panel frame surfaces
with a soft cloth soaked in alcohol.
2. Tear the backing paper from the new membrane switch.
3. Insert the ribbon cable of the membrane switch into the slit of the
control panel frame.
4. Adjust the upper edge and right edge of the membrane switch to
the small depression on the surface of the control panel frame.
5. Attach the membrane switch to the control panel frame by rubbing
with a soft cloth not to scratch.
6. Tear the backing paper from the new graphic sheet.
7. Adjust the upper edge and right edge of the graphic sheet to the
large depression on the surface of the control panel frame.
8. Attach the graphic sheet to the control panel frame by rubbing with
a soft cloth not to scratch.
9. Reinstall control unit to the control panel frame with the five (5)
screws.
10.Connect the ribbon cable of the membrane switch to the connector
(CN-G) on the control unit.
Figure C-1. Graphic Sheet and Membrane Switch Replacement
Graphic sheet
Small depression
Control panel frame
Slit
Membrane
switch (FPC)
switch (FPC)
Ribbon
cable
cable
Large
depression
depression
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