Power Supply Cord Replacement; Turntable Motor Removal; Cooling Fan Motor Removal - Sharp R-231NW Service Manual

R-231NW

[9] POWER SUPPLY CORD REPLACEMENT

1. 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. Remove the single (1) screw holding the green wire to the
oven cavity back plate.
5. Disconnect the leads of the power supply cord from the
noise fi lter, referring to the Figure C-3(a).
6. Release the moulding cord stopper of the power supply cord
from the square hole of the oven cavity back plate, referring
to the Figure C-3(b).
7. Now, the power supply cord is free.
Power Supply
Screw
Cord
Green Wire
Gray Wire
Gray Wire
Connect the wire lead which has the black case to
the terminal "L" of the noise filter.
Figure C-3(a) Power Supply Cord Replacement

[10] TURNTABLE MOTOR REMOVAL

1. REMOVAL
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.
5. Disconnect wire leads from turntable motor.
(See "Positive lock connector removal")
6. Remove one (1) screw holding turntable motor to oven
cavity.
7. Remove the TTM packing from the turntable motor.
8. Now, the turntable motor is free.

[11] COOLING FAN MOTOR REMOVAL

1. 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 two (2) screws holding the fan motor to the
oven cavity back plate.
6. Remove the fan blade from the fan motor shaft according to
the following procedure.
7. 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 EASY TO BE SHAVEN BY PLIERS AND
METAL PIECES MAY BE PRODUCED.
Oven Cavity
Back Plate
Noise Filter
11 - 4
2. REINSTALL
1. Insert the moulding cord stopper of power supply cord into
the square hole of the rear cabinet, referring to the Figure
C-3 (b).
2. Install the earth wire lead of power supply cord to the oven
cavity back plate with one (1) screw and tight the screw.
3. Connect the gray wire leads of power supply cord to the
noise fi lter correctly, referring to the Pictorial Diagram.
4. Re-install outer case and check that the oven is operating
properly.
Moulding
Cord Stopper
Oven Cavity
Back Plate
Figure C-3(b) Power Supply Cord Replacement
2. REINSTALL
1. Re-install the TTM packing.
2. Re-install the turntable motor with the TTM packing with the
single (1) screw to the oven cavity bottom plate.
3. Re-connect the wire leads to the turntable motor.
4. Insert the tab of the turntable motor cover into the hole of
the bottom plate.
5. Re-install the turntable motor cover to the bottom plate with
one (1) screw.
Figure C-4. TTM packing Installation
DO NOT TOUCH THE PLIERS TO THE COIL OF
THE FAN MOTOR BECAUSE THE COIL MAY BE
CUT OR INJURED.
D O N O T D I S F I G U R E T H E B R A C K E T B Y
TOUCHING WITH THE PLIERS.
8. Remove the fan blade assembly from the shaft of the fan
motor by pulling and rotating the fan blade with your hand.
9. Now, the fan blade will be free.
CAUTION: DO NOT RE-USE THE REMOVED FAN BLADE
BECAUSE THE HOLE (FOR SHAFT) MAY BE
LARGER THAN NORMAL.
10.Now, the fan motor is free.
Power Supply
Cord
Square
Hole
TTM packing
Turntable motor