Fan Motor Replacement - Sharp R-880B Service Manual

1. CARRY OUT 3D CHECKS.
2. Now, the back plate with the sub back plate should be
removed.
3. Disconnect the connector CN-D from the control unit.
4. Remove the one (1) screw holding the air duct to the
oven cavity rear plate.
5. Remove the air duct assembly from the oven cavity
rear plate.
1. CARRY OUT 3D CHECKS.
2. Now, the back plate with the sub back plate should be
removed.
3. Disconnect the connector CN-F from the control unit.
1. CARRY OUT 3D CHECKS.
2. Now, the back plate with the sub back plate should be
removed.
3. Disconnect the wire leads from the convection motor.
4. Remove the two (2) screws holding the conv. thermal
cover to the oven cavity rear plate.
5. Remove the four (4) screws holding the convection
duct to the oven cavity rear plate.
6. Remove the convection duct assembly from the oven
cavity rear plate.
7. Remove the one (1) nut and the two (2) washers
holding the convection fan to the convection motor
shaft.
8. Remove the convection fan.
9. Remove the three (3) screws holding the convection
REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the one (1) screw holding the noise filter to the
chassis support.
3. Release the noise filter from the tab on the fan duct.
4. Disconnect the wire leads from the fan motor.
5. Remove the one (1) screw holding the capacitor holder
to the oven cavity rear plate.
6. Remove the one (1) screw holding the fan duct to the
oven cavity rear plate.
7. Release the tabs of the capacitor holder from fan duct.
8. Remove the fan duct from the oven.
9. 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 let the pliers touch the coil of the fan
motor because the coil may be cut or dam-
aged.
• Do not distort the bracket by touching with the
pliers.
THERMISTOR REMOVAL
AH SENSOR ASSEMBLY REMOVAL
CONVECTION MOTOR REMOVAL

FAN MOTOR REPLACEMENT

29
6. Remove the one (1) screw holding the thermistor angle
to the oven cavity rear plate.
7. Remove the thermistor angle together with thermistor
from the oven.
8. Straighten the tab of the thermistor angle holding the
thermistor to the thermistor angle.
9. Remove the thermistor from the thermistor angle.
4. Remove the two (2) screws holding the AH sensor
assembly to air duct assembly.
5. Now, the AH sensor assembly is free.
duct to the conv. thermal cover.
10.Remove the convection duct with the conv. air angles
from the conv. thermal cover.
11.Remove the thermal insulation.
12.Remove the one (1) pipe holding the cooling fan to the
convection motor shaft.
13.Remove the cooling fan and the one (1) washer from
the convection motor shaft.
14.Remove the two (2) screws holding the convection
motor to the conv. thermal cover.
15.Remove the convection motor from the conv. thermal
cover.
16.Remove the one (1) ring from the convection motor
shaft.
17.Now, the convection motor is free.
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:
• Once the fan blade has been removed, it must
be replaced with a new one.
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. Fix the fan blade to the fan motor shaft according to
the following procedure.
1) Hold the centre of the bracket which supports the
shaft of the fan motor on a flat table.
2) 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 when installing it
because the bracket may be deformed.
• Make sure that the fan blade rotates smoothly
after installation.
R-880B