Pictorial Diagram; Cooling Fan Motor Removal - Sharp R-230HW Service Manual

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.
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 magnetron from the waveguide. Refer to
chapter "MAGNETRON REMOVAL"
5. Disconnect the wire lead from the C/T fuse.
6. Remove the one (1) screw to get the C/T fuse off.
7. Disconnect the wire leads from the fan motor.
8. Remove the wire leads from the hole of the fan duct.
9. Remove the three (3) screws holding the fan duct to the
oven cavity.
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.
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.
5. Remove two (2) screws holding latch hook to oven
flange.

COOLING FAN MOTOR REMOVAL

15.Remove the two (2) screws holding the fan motor to the
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
6. Install the fan motor assembly to the oven cavity with
7. Re-install the C/T fuse to the oven cavity with the one (1)
8. Install the magnetron with three (3) screws.
9. Re-install the wire leads into the hole of the fan duct.
10.Connect the wire leads to the magnetron and the fan
Shaft
These are the positions
Axis
that should be pinched
with pliers.
Stator
Rotor
Side View
6. Remove the switch lever from the oven cavity
7. Remove latch hook assembly from oven flange.
8. Push outward on the two (2) retaining tabs holding switch
9. Switch is now free.
25
TTM packing
Turntable motor
Figure C-3. TTM packing Installation
CAUTION:
• Do not re-use the removed fan blade because
the hole (for shaft) may be larger than normal.
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.
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.
three (3) screws.
screw.
motor, referring to the pictorial diagram.
Table
in place.
R-203HW
R-220HW
R-230HW
Shaft
Center of
bracket