Sharp R-1850 Service Manual page 33

8. Disconnect the high voltage rectifier assembly from the
high voltage capacitor.
9. Now, the high voltage rectifier assembly is free.
10.Remove capacitor from the holder.
11.Now, the high voltage capacitor is free.
1. Unplug the oven from power outlet and remove the oven
from wall and remove outer case. (Refer to procedure of
"Removal of Oven from Wall" and "Outer case Removal")
2. Disconnect the wire leads from the hood fan thermal cut-
1. Unplug the oven from power outlet and remove the oven
from wall and remove outer case. (Refer to procedure of
"Removal of Oven from Wall" and "Outer case Removal")
2. 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
1. Unplug the oven from power outlet, remove the oven
from wall, 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".)
2. 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".
3. Discharge high voltage capacitor.
4. Release the two (2) snaps of the magnetron duct from
the oven cavity. And remove the two (2) tabs of the
magnetron duct from the fan duct.
5. Release snap bands of the main harness A installed to
the fan duct and nearest the fan duct.
6. Disconnect the wire leads from the fan motor.
7. Remove one (1) screw holding the fan duct assembly to
oven cavity.
8. Release the fan duct assembly from the oven cavity.
9. Remove the fan blade from the fan motor shaft according
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 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.
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
HOOD FAN THERMAL CUT-OUT REMOVAL
TEMPERATURE FUSE (MAGNETRON) REMOVAL
COOLING FAN MOTOR REMOVAL
CAUTION: WHEN REPLACING THE HIGH VOLTAGE
RECTIFIER ASSEMBLY, THE GROUND SIDE
TERMINAL MUST BE SECURED FIRMLY
WITH A GROUNDING SCREW.
out.
3. Remove the hood fan thermal cut-out from the base plate
right.
4. Now, the hood fan thermal cut-out is free.
LAMP SOCKET AND AH SENSOR REMOVAL".
3. Disconnect the wire leads from the temperature fuse
(Magnetron).
4. Remove the one (1) screw holding the temperature fuse
(Magnetron) to the oven cavity.
5. Now, the temperature fuse (Magnetron) is free.
fan duct.
11.Now, the fan motor is free.
Coil
Groove joint pliers
Stator
Gap
Bracket
Rotor
Rear View
Axis
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.
31
Shaft
These are the areas
that should be held
with a pliers
Stator
Rotor
Side View
R-1850
R-1851