Sharp R-4H56, Руководство по обслуживанию

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R-4H56
REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect the wire leads from the fan motor.
3. Disconnect the H.V. wire A and the filament lead (longer
one) of the power transformer from the magnetron.
4. Release the H.V. wire A and filament lead from the holes
in the fan duct.
5. Remove the snap band of the wire leads connected to
the oven lamp from the hole of the oven cavity.
6. Remove the one (1) screw holding the magnetron air
guide to the oven cavity and remove the magnetron air
guide.
7. Release the tabs of the fan duct from the holes in the
bottom plate and the back plate of the oven cavity.
8. Release the main wire harness from the hole in the fan
duct.
9. Now, the fan motor assembly is free.
10.Remove the fan blade from the fan motor shaft according
the following procedure.
1) Hold the edge of the rotor of the fan motor by using a pair
of groove joint pliers.
4. Remove the air duct from the oven cavity.
5. Carefully remove four (4) screws holding magnetron to
waveguide, when removing the screws holding the
magnetron to prevent it fro falling.
6. Remove the magnetron from the waveguide with care so
the magnetron antenna should not hit by any metal
object around the antenna.
7. Remove the magnetron cushion from the magnetron.
CAUTION: WHEN REPLACING THE MAGNETRON, BE
SURE THE R.F. GASKET IS IN PLACE AND
THE MAGNETRON MOUNTING SCREWS
ARE TIGHTENED SECURELY.
OVEN LAMP AND LAMP SOCKET REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the snap of the wire tie holding the wire leads to
the oven lamp from the hole of the oven cavity.
3. Remove the one (1) screw holding the magnetron air
guide to the oven cavity.
4. Lift up the tab holding the oven lamp socket.
5. Remove the oven lamp socket.
6. 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.
7. Now, the oven lamp socket is free.
Oven lamp
socket
Terminal
Wire lead
Flat type small
screw driver
Terminal hole
Figure C-1 Oven lamp socket
5. Remove the two (2) screws holding the turntable motor
to oven cavity bottom side and remove the turntable
motor.
6. Turntable motor is now free. At this time, o-ring and
washer is removed. Do not loose them.
TURNTABLE MOTOR REMOVAL
1. Disconnect the oven from power supply.
2. Remove the turntable and roller stay from the oven
cavity.
3. Remove the one (1) screw holding the turntable motor
cover to the bottom plate and remove the cover.
4. Disconnect the wire leads from turntable motor.
TURNTABLE COUPLING REMOVAL
1. Remove the turntable motor, refer to “Turntable Motor
Removal”.
2. At the time turntable coupling will be free.
TURNTABLE
COUPLING
BOTTOM
OVEN CAVITY
T.T. MOTOR
ANGLE
Figure C-2. Turntable Coupling
FAN MOTOR REPLACEMENT
CAUTION:
*
Make sure that any pieces do not enter the gap
between the rotor and the stator of the fan motor.
Because the rotor is easy to be shaven by pliers and
metal pieces may be produced.
* Do not touch the pliers to the coil of the fan motor
because the coil may be cut or injured.
* Do not transform the bracket by touching with the
pliers.
2) Remove the fan blade assembly from the shaft of the fan
motor by pulling fan retainer clip and rotating the fan
blade with your hand.
3) Now, the fan blade will be free.
CAUTION:
*
Do not use this removed fan blade again. Because
the hole (for shaft) of it may become bigger than a
standard one.
11.Remove the two (2) screws and nuts holding the fan
motor to the fan duct.
12.Now, the fan motor is free.