Pictorial Diagram; Cooling Fan Motor Removal - Sharp R-203BW Service Manual

Hide thumbs

Table of Contents

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 one (1) screw holding the chassis support

to the oven cavity front plate.

6. Remove the chassis support .

7. Release the filament lead of the power transformer and

the H.V. wire from the fan duct.

8. Remove the one (1) screw holding the light mounting

plate to the oven cavity.

9. Release the wire leads (to the oven lamp) from the hole

of the fan duct.

10.Release the fan motor 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 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 disfigure the bracket by touching with

the pliers.

13 Remove the fan blade assembly 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 re-use the removed fan blade because

the hole (for shaft) may be larger than normal.

Coil

Groove joint pliers

Stator

Gap

Bracket

Rotor

Rear View

DOOR SENSING SWITCH, SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH 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 wire leads from the switches and control

panel.

5. Remove the control panel assembly from the oven cavity

front flange. Refer to chapter "CONTROL PANEL

ASSEMBLY REMOVAL"

COOLING FAN MOTOR REMOVAL

Shaft

These are the positions

Axis

that should be pinched

with pliers

Stator

Rotor

Side View

15. Remove the two (2) screws holding the fan motor to the

fan duct.

16. Now, the fan motor is free.

INSTALLATION

Install the fan motor to the fan duct with the two (2)

screws.

Install the fan blade to the fan motor shaft according to

the following procedure.

Hold the center of the bracket which supports the shaft

of the fan motor on the flat table.

Apply the screw lock tight into the hole (for shaft) of the

fan blade.

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.

CAUTION:

• Do not hit the fan blade strongly when installed

because the bracket may be transformed.

• Make sure that the fan blade rotates smooth after

installed.

• Make sure that the axis of the shaft is not slanted.

Install the fan motor assembly to the oven cavity by

fitting the tabs of the fan duct into the holes of the oven

cavity and the waveguide flange.

Re-install the light mounting plate to the oven cavity

with the one (1) screw.

Insert the end of the chassis support into the slit of the

oven cavity rear cabinet.

Re-install the chassis support to the oven cavity front

plate with the one (1) screw.

10. Install the filament lead and the H.V. wire into the hole

of the fan duct .

11. Re-install the wire leads (to the oven lamp) to the hole

of the fan duct.

12. Connect the wire leads to the fan motor, referring to the