Turntable Motor Removal; Cooling Fan Motor Removal - Sharp R-307KW Service Manual

R307KW

[9] TURNTABLE MOTOR 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.

[10] COOLING FAN MOTOR REMOVAL

1. REMOVAL
1. Disconnect the power supply cord and then 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 fol-
lowing procedure.
7. Hold the edge of the rotor of the fan motor by using a pair of groove
joint pliers.
CAUTION: Make sure that no metal pieces 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 pli-
ers.
8. Remove the fan blade assembly from the shaft of the fan motor by
pulling and rotating the fan blade with your hand.
Coil
Stator
Gap
Bracket
Rotor
Rear View
Control panel frame
Large
depression
Small
backing
paper
Ribbon
cable
Membrane
switch
Graphic sheet
Figure C-2. Graphic Sheet and Membrane Switch Replacement
Groove joint pliers
Shaft
Axis
Stator
Rotor
Side View
Liquid crystal
display
Slit
Ribbon cable
of membrane
switch
Small
depression
5. Disconnect wire leads from turntable motor.
(See "Positive lock® connector removal")
6. Remove one (1) screw holding turntable motor to oven cavity.
7. Now, the turntable motor is free.
8. After replacement use the one (1) screw to fit the turntable motor
cover.
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.
2. INSTALLATION
1. Install the fan blade to the fan motor shaft according to the following
procedure.
2. Hold the center of the bracket which supports the shaft of the fan
motor on the flat table.
3. Apply the screw lock tight into the hole (for shaft) of the fan blade.
4. 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.
5. Install the fan motor assembly to the oven cavity back plate with
two (2) screws.
CAUTION: Do not hit the fan blade strongly when installed
because the bracket may be disfigured.
Make sure that the fan blade rotates smooth after
installation.
Make sure that the axis of the shaft is not slanted.
6. Connect the wire leads to the magnetron and fan motor, referring to
the pictorial diagram.
These are the positions
that should be pinched
with pliers.
11 – 4
Control panel frame
(Rear side)
Long slit
Contact surface
Rubber connector
Shaft
Table
Center of
bracket