Sharp R-390B Service Manual page 24

R-390B
9. Remove the fan blade from the fan motor shaft according
to the following procedure.
1) Hold the edge of the rotor of the fan motor by using a
pair of grove 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.
2) Remove the fan blade from the shaft of the fan motor
by pulling and rotating the fan blade with your hand.
3) 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.
10.Remove the two (2) screws holding the fan motor to the
fan duct.
11.Now, the fan motor is free.
INSTALLATION
1. Install the fan motor to the fan duct with the two (2)
screws.
Coil
Groove joint pliers
Stator
Gap
Bracket Rotor
Rear View
Removal
1. CARRY OUT 3D CHECKS.
2. Disconnect the brown and blue wires of the power
supply cord from the noise filter.
3. Remove the single (1) screw holding the earth wire of
power supply cord.
4. Remove the power supply cord from the oven cavity
back plate.
Re-install
1. Insert the power supply cord into the oven cavity back
plate.
2. Connect the brown and blue wires of power supply cord
into the terminals of noise filter, referring to the
"PICTORIAL DIAGRAM".
3. Re-install the earth wire to bottom plate with one (1)
screw.
1ST. LATCH SWITCH, 2ND. LATCH SWITCH, STOP SWITCH AND MONITOR SWITCH REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect wire leads from the switches.
3. Remove two (2) screws holding latch hook to oven
flange.
4. Remove latch hook assembly from oven flange.
Shaft
Axis
Stator
Rotor
Side View
POWER SUPPLY CORD REPLACEMENT
22
2. Install the fan blade to the fan motor shaft according to
the following procedure.
1) Hold the center of the bracket which supports the shaft
of the fan motor on the flat table.
2) Apply the screw lock tight into the hole (for shaft) of the
fan blade.
3) 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 disfigured.
* Make sure that the fan blade rotates smooth after
installation.
* Make sure that the axis of the shaft is not slanted.
3. Catch three holes of fan duct on three tabs of the
waveguide flange.
4. Install the fan duct assembly to the oven cavity top and
front plate with the two (2) screws.
5. Insert the snap of the main wire harness to the hole of
the fan duct and insert the main wire harness into the
hole of the fan duct.
6. Install the chassis support and the magnetron to oven
cavity.
7. Connect the wire leads to the fan motor, referring to the
"PICTORIAL DIAGRAM".
Table
These are the position
where should be
pinched with pliers
4. CARRY OUT 4R CHECKS.
Note : Step 4 above is important, and it must be done
after replacing power supply cord.
Blue wire
L
N
Noise
filter
Green/Yellow wire
Figure C-6. Power supply cord replacement
5. Push outward on the two (2) retaining tabs holding
switch in place.
6. Switch is now free. At this time switch lever will be free,
do not lose it.
Shaft
Center of
bracket
Brown wire
Power supply
cord