Sharp R-330BK Service Manual page 31

NOTE: 1. Before attaching a new key unit, wipe off remaining
adhesive on the control panel frame surfaces
completely 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.
3. Stick the key unit firmly to the control panel frame
by rubbing with soft cloth not to scratch.
CPU UNIT AND POWER UNIT
NOTE: Handle the CPU unit carefully so that the ribbon
cable does not come off. Because the ribbon cable
1. Disconnect the power supply cord.
2. Remove turntable and turntable support from oven cavity.
3. Lay the oven on it's backside. Remove the turntable
motor cover by snipping off the material in four corners.
4. Where the corners have been snipped off bend corner
areas flat. No sharp edges must be evident after removal
of the turntable motor cover.
REMOVAL
1. Disconnect the power supply cord and remove outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Disconnect the wire leads from the fan motor.
5. Remove the magnetron from the waveguide flange,
referring to "MAGNETRON REMOVAL".
6. Release the snap of the main wire harness from the fan duct.
7. Remove one (1) screw holding the fan duct assembly to
oven cavity.
8. Release the main wire harness from the hole of the fan duct.
9. Release the fan duct from the waveguide flange.
10.Release the fan duct assembly from the oven cavity.
11.Remove the fan blade from the fan motor shaft according
to the following procedure.
12.Hold the edge of the rotor of the fan motor by using a pair
of groove joint pliers.
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 easily 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 disfigure the bracket by touching with the
pliers.
13.Remove the fan blade from the shaft of the fan motor by
pulling and rotating the fan blade with your hand.
14. Now, the fan blade will be free.
CAUTION:
* Do not reuse the removed fan blade because the
hole (for shaft) may be larger than normal.
15.Remove the two (2) screws holding the fan motor to the
TURNTABLE MOTOR REMOVAL
5. Disconnect wire leads from turntable motor.
6. Remove two (2) screws holding turntable motor to oven
7. Now the turntable motor is free.
8. After replacement use the one (1) screw to fit the
COOLING FAN MOTOR REMOVAL
16.Now, the fan motor is free.
INSTALLATION
1. Install the fan motor to the fan duct with the two (2)
2. Install the fan blade to the fan motor shaft according to
3. Hold the center of the bracket which supports the shaft
4. Apply the screw lock tight into the hole (for shaft) of the
5. Install the fan blade to the shaft of fan motor by pushing
CAUTION:
* Do not hit the fan blade strongly when installed
* Make sure that the fan blade rotates smooth after
* Make sure that the axis of the shaft is not slanted.
6. Catch three holes of fan duct on three tabs of the
7. Install the fan duct assembly to the oven cavity with the
8. Insert the snap of the main wire harness to the hole of the
9. Install the magnetron and the chassis support to the
10.Connect the wire leads to the fan motor, referring to the
29
is glued on the LCD and the printed wiring board
only by heated paste.
Ribbon cable
Figure C-4. CPU unit
(See "Positive lock connector removal")
cavity.
turntable motor cover.
fan duct.
screws.
the following procedure.
of the fan motor on the flat table.
fan blade.
the fan blade with a small, light weight, ball peen hammer
or rubber mallet.
because the bracket may be disfigured.
installation.
waveguide flange.
one (1) screw.
fan duct and insert the main wire harness into the hole of
the fan duct.
oven cavity, referring to "Re-install of MAGNETRON
REMOVAL".
pictorial diagram.
R-330BK
R-330BW