Sharp R-211A, Service Manual

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16
R-211A
FAN MOTOR REPLACEMENT
REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect the wire leads from the fan motor.
3. Remove the one (1) screw holding the chassis support
to the oven cavity front plate.
4. Remove the chassis support .
5. Release the filament lead of the power transformer and
the H.V. wire from the fan duct.
6. Remove the one (1) screw holding the fan duct to the
waveguide flange.
7. Release the fan motor assembly from the oven cavity.
8. Remove the fan blade from the fan motor shaft accord-
ing to the following procedure.
1) 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 transform the bracket by touching with
the pliers.
2) Remove the fan blade assembly 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 re-use the removed fan blade be-
cause the hole (for shaft) may be lager
than normal.
9. Remove the two (2) screws holding the fan motor to
the fan duct.
10. 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 centre 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 transformed.
• Make sure that the fan blade rotates smooth
after installed.
• Make sure that the axis of the shaft is not
slanted.
3. Install the fan motor assembly to the oven cavity by
fitting the holes of the fan duct into the tabs of the oven
cavity.
4. Re-install the fan duct to the waveguide flange with
the one (1) screw.
5. Insert the end of the chassis support into the slit of the
oven cavity rear cabinet.
6. Re-install the chassis support to the oven cavity front
plate with the one (1) screw.
7. Install the filament lead and the H.V. wire into the hole
of the fan duct .
8. Connect the wire leads to the fan motor, referring to
the pictorial diagram.
Rear View
Gap
Rotor
Bracket
Stator
Groove joint pliers
Coil
Shaft
Axis
Stator
These are the areas
that should be held
with a pliers
Rotor
Shaft
Table Center of
bracket
Side View
1ST. LATCH SWITCH, 2 ND. LATCH SWITCH AND MONITOR SWITCH REMOVAL
1. CARRY OUT 3D CHECKS.
2. Disconnect wire leads from all switches.
3. Remove the control panel assembly and switch lever
from the oven cavity front flange. Referring to chapter
"CONTROL PANEL ASSEMBLY AND SWITCH LE-
VER REMOVAL"
4. Remove two (2) screws holding latch hook to oven
flange.
5. Remove latch hook assembly from oven flange.
6. Push outward on the two (2) retaining tabs holding
switch in place.
7. Switch is now free.
Re-install
1. Re-install each switch in its place. The 1st. latch switch
and monitor switch are in upper position. The 2nd. latch
switch is in the lower position.