Sharp R-340A, Service Manual

Page: 23 / 36

R-340A
21
* 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.
2. Install the fan blade to the fan motor shaft according 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 one (1) tab of the chassis support to oven cavity
front plate and install another tab of it to rear plate. And
then screw chassis support to magnetron and oven
cavity front plate with two (2) screws.
7. Connect the wire leads to the fan motor, referring to the
pictorial diagram.
Coil
Gap
Rotor
Bracket
Stator
Groove joint pliers
Shaft
Axis
Stator
These are the position
where should be
pinched with pliers
Rotor
Shaft
Table
Center of
bracket
Side View Rear View
POWER SUPPLY CORD REPLACEMENT
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 pictorial
diagram.
3. Re-install the earth wire to bottom plate with one (1)
screw.
4. CARRY OUT 4R CHECKS.
Note : Step 4 above is important, and it must be done
after replacing power supply cord.
Noise
filter
Power supply
cord
Brown wire
Blue wire
Green/Yellow wire
N L
Figure C-6. Power supply cord replacement
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.
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.
Re-install
1. Re-install each switch lever and latch switch in its
place. The 1st. latch /stop/monitor switches are in the
lower position and the 2nd. latch switch is in the upper
position.
2. Re-connect wire leads to each switch.
Refer to pictorial diagram.
3. Secure latch hook (with two (2) mounting screws) to
oven flange.
4. Make sure that the monitor switch is operating properly
and check continuity of the monitor circuit. Refer to
chapter "Test Procedure" and Adjustment procedure.