Cooling Fan Motor Removal - Sharp R-1880LS Service Manual

1. Disconnect the power supply cord, remove the oven from
wall and remove outer case, remove the unit mounting screw
and hood intake duct R. (Refer to procedure of "Removal of
Oven from Wall", "Outer case Removal" and "Unit Mounting
Screw and Hood Intake Duct R Removal".)
. Open door and block it open.
3. Discharge high voltage capacitor.
4. Remove the hood fan motor and the hood exhaust duct from
the oven cavity, referring to the procedure of " HOOD FAN
MOTOR, HOOD EXHAUST DUCT, OVEN LAMP SOCKET
AND AH SENSOR REMOVAL".
5. Discharge high voltage capacitor.
6. Release the two () snaps of the magnetron duct from the
oven cavity. And remove the two () tabs of the magnetron
duct from the fan duct.
7. Release snap bands of the main harness A installed to the fan
duct and nearest the fan duct.
8. Disconnect the wire leads from the fan motor.
9. Remove one (1) screw holding the fan duct assembly to oven
cavity.
10. Release the fan duct assembly from the oven cavity.
11. Remove the fan blade from the fan motor shaft according the
following procedure.
CAUTION:
* Make sure that any pieces do not enter the gap
between the rotor and the startor 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.
1) Hold the edge of the rotor of the fan motor by using a pair of
groove joint pliers.
) 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.
. Remove the two () screws holding the fan motor to the fan
duct.
1. Now, the fan motor is free.
Table

COOLING FAN MOTOR REMOVAL

INSTALLATION
1. Install the fan motor to the fan duct with the two () screws.
. Install the fan blade to the fan motor shaft according the
1) Hold the center of the bracket which supports the shaft of the
) Apply the screw lock tight into the hole (for shaft) of the fan
3) Install the fan blade to the shaft of fan motor by pushing the
CAUTION:
* Do not hit the fan blade strongly when installed
* Make sure that the fan blade rotates smooth after
* Make sure that the axis of the shaft is not slanted.
3. Install the fan duct assembly to the oven cavity with the one
4. Install the magnetron duct to the fan duct and oven cavity.
5. Connect the wire leads to the fan motor, referring to the pictorial
6. Reinstall the released snap bands of the main harness A to the
7. Refer to procedure of "HOOD FAN MOTOR, HOOD
3. Secure the latch hook (with two () mounting screws) to oven
4. Make sure that the monitor switch is operating properly and
Shaft
Center of
bracket
43
following procedure.
fan motor on the flat table.
blade.
fan blade with a small, light weight, ball peen hammer or
rubber mallet.
because the bracket may be disfigured.
installation.
(1) screw.
diagram.
fan duct and nearest the fan duct.
EXHAUST DUCT, OVEN LAMP SOCKET AND AH
SENSOR REMOVAL" and "Unit Mounting Screw and Hood
Intake Duct R Removal" and "Outer case Removal". And
reverse their procedure.
And install the hood intake duct R, hood exhaust duct and
outer case.
cavity front flange.
check continuity of the monitor circuit. Refer to chapter
"Test Procedure" and "Adjustment procedure".
Rear View
Coil
Groove joint pliers
Stator
Gap
Bracket
Rotor
Shaft
Axis
Stator
Rotor
R-1880LS/LST
These are the areas
that should be held
with a pliers
Side View