Read Sharp R-895M (serv.man8) Service Manual online
R-895M - 25
MAGNETRON REMOVAL
CONTROL PANEL ASSEMBLY REMOVAL
FAN MOTOR REPLACEMENT
HIGH VOLTAGE TRANSFORMER REMOVAL
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE
1. CARRY OUT 3D CHECKS.
2. Disconnect the wire leads and the connectors from the
2. Disconnect the wire leads and the connectors 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 and pull it forward.
Now the control panel assembly is free.
NOTE:
1. Before attaching a new key unit, wipe off remaining
1. Before attaching a new key unit, wipe off remaining
adhesive on the control panel frame surfaces com-
pletely with a soft cloth soaked in alcohol.
pletely 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.
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.
REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the one (1) screw holding the noise filter to the
2. Remove the one (1) screw holding the noise filter to the
chassis support.
3. Release the noise filter from the tabs of the fan duct.
4. Remove the one (1) screw holding the chassis support
4. Remove the one (1) screw holding the chassis support
to the oven cavity front flange.
5. Remove one(1) screw holding the chassis support to the
magnetron.
6. Remove the chassis support from the oven cavity.
7. Disconnect the wire leads from the fan duct.
8. Remove the one (1) screw holding the capacitor holder
7. Disconnect the wire leads from the fan duct.
8. Remove the one (1) screw holding the capacitor holder
to the oven cavity back plate.
9. Release the tabs of the capacitor holder from the fan
duct.
10.Remove the one (1) screw holding the fan duct to the
oven cavity back plate.
11.Remove the fan duct from the oven.
12.Remove the fan duct from the fan motor shaft accord-
12.Remove the fan duct from the fan motor shaft accord-
ing to the following procedure.
1) Hold the edge of the rotor of the fan motor by using
1) Hold the edge of the rotor of the fan motor by using
a pair of groove joint pliers.
CAUTION:
• Make sure that no swarf from the rotor enters
the gap between the rotor & startor of the fan
motor.
motor.
• Avoid touch the coil of the fan motor with the
pliers as the coil may become cut or damaged.
• Avoid deforming the bracket whilst using the
pliers.
2) Remove the fan blade assembly from the shaft of
the fan motor by pulling and rotating the fan blade
with your hand.
with your hand.
3) Now, the fan blade is free.
CAUTION:
• Do not reuse the removed fan blade as the
• Do not reuse the removed fan blade as the
fixing hole may be oversize.
12.Remove the two (2) screws holding the fan motor to the
fan duct.
13.Now, the fan motor is free.
INSTALLATION
1. Install the the fan motor to the fan duct with the two (2)
screws.
2. Install the fan blade to the fan motor shaft according to
the following procedure.
1) Hold the centre of the bracket which supports the
1) Hold the centre of the bracket which supports the
shaft of the fan motor on a flat table.
2) Apply the screw lock tight into the hole (for shaft) of
the fan blade.
3) Install the fan blade to the shaft of fan motor by
pushing the fan blade with a small, light weight, ball
peen hammer or rubber mallet.
peen hammer or rubber mallet.
CAUTION:
• Do not hit the fan blade when installing be-
• Do not hit the fan blade when installing be-
cause the bracket may be deformed.
• Make sure that the fan blade rotates smoothly
after installation.
• Make sure that the axis of the shaft is not
slanted.
3. Insert the tabs of the capacitor holder to the fan duct.
4. Install the fan duct to the oven cavity back plate with the
4. Install the fan duct to the oven cavity back plate with the
one (1) screw.
5. Install the capacitor holder to the oven cavity back plate
with the one (1) screw.
6. Re-install the chassis support to the oven cavity with the
one (1) screw.
7. Re-fit the one(1) screw to secure the chassis support to
the magnetron.
8. Install the noise filter to the fan duct and the chassis
support with the one (1) screw.
9. Re-connect the wire leads to the fan motor.
1. CARRY OUT 3D CHECKS.
2. Disconnect the filament leads of high voltage trans-
2. Disconnect the filament leads of high voltage trans-
former from high voltage capacitor and the magnetron.
3. Disconnect the high voltage transformer secondary
wire from the high voltage transformer.
4. Disconnect the main wire harness from the high volt-
age transformer.
5. Remove the two (2) screws and one (1) washer holding
the transformer to the base plate.
7. Remove the transformer.
8. Now the high voltage transformer is free.
8. Now the high voltage transformer is free.
1. CARRY OUT 3D CHECKS.
2. Disconnect the H.V. wire B and filament lead of the
2. Disconnect the H.V. wire B and filament lead of the
transformer from the magnetron.
3. Remove the one (1) screw holding the chassis support
to the magnetron.
4. Move the air intake duct to left.
5. Carefully remove four (4) screws holding the magnetron
5. Carefully remove four (4) screws holding the magnetron
to the waveguide. When removing the screws hold the
magnetron to prevent it from falling.
magnetron 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.
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.
AND THE MAGNETRON MOUNTING
SCREWS ARE TIGHTENED SECURELY.
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