Sharp R-930CS Service Manual page 37

16.Remove the fan blade from the fan motor shaft according
the following procedure.
17.Hold the edge of the rotor of the fan motor by using a pair
of grove 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
pliers.
18.Remove the fan blade from the shaft of the fan motor by
pulling and rotating the fan blade with your hand.
19. 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.
20.Remove the two (2) screws and nuts holding the fan
motor to the fan duct.
21.Now, the fan motor is free.
INSTALLATION
1. Install the fan motor to the fan duct with the two (2)
screws and nuts.
2. Install the fan blade to the fan motor shaft according the
following procedure.
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 then remove
outer case.
2. Open the oven door and block it open.
3. Discharge high voltage capacitor.
4. Remove the control panel assembly, refer to "Control
Panel Removal".
5. Disconnect wire leads from each of the switches and
fuse holder.
6. Remove two (2) screws holding latch hook to oven
flange.
7. Remove latch hook assembly from oven flange.
8. Push outward on the one (1) stopper tabs holding each
of switches place.
9. Switch is now free.
DOOR SENSING SWITCH/SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH ADJUSTMENT
1. Disconnect the power supply cord and then remove
outer case.
2. Open the oven door and block it open.
3. Hold the center of the bracket which supports the shaft
of the fan motor on the flat table.
4. Apply the screw lock tight into the hole (for shaft) of the
fan blade.
5. 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.
6. Reset the fan duct assembly to its place.
7. Install the tabs of fan duct to the rear cabinet and air
guide.
8. Install the magnetron air guide with the one (1) screw.
9. Reinstall the main harness and thermistor harness to
each hole of the fan duct.
10.Reinstall the chassis support to the control panel back
plate, waveguide and rear cabinet with the three (3)
screws.
11.Re-connect the wire leads to the fan motor, referring to
the pictorial diagram.
12.Re-install the fan motor grounding wire to the air guide
(Right) with one (1) screw.
Shaft
Axis
Stator
Rotor
Side View
At this time switch lever will be free, do not lose it.
Re-install
1. Re-install switch lever and each interlock switch in its
place. The secondary interlock switch is in the lower
position and the door sensing switch is in the upper
position and the monitor switch is in the middle position.
2. Re-connect wire leads to each switches and fuse holder.
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.
chapter "Test Procedure" and Adjustment procedure.
3. Discharge high voltage capacitor.
If the door sensing switch, secondary interlock switch and
monitor switch do not operate properly due to a
35
Table
These are the positions
that should be pinched
with pliers
R-930CS
Shaft
Center of
bracket
Refer to