Service manual

23
R-120DB
R-120DK
R-120DR
R-120DW
COOLING FAN MOTOR REMOVAL
REMOVAL
1. Disconnect the power supply cord and remove outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Disconnect the wire leads from the fan motor.
5. Disconnect the wire leads from the terminal of power
supply cord.
6. Disconnect the green wire leads from the fan duct.
7. Disconnect the high voltage wire and the filament lead
wire from H.V. capactor. And disconnect the filament
lead wire from the magnetron.
8. Remove the one (1) screw holding the top separator to
the fun duct.
9. Remove the one (1) screw holding the chassis support
to the fun duct.
10.Lift up the barrier and then pull out from rear side of the
oven cavity.
11.Remove the two (2) screws holding the fan duct to the
rear side of oven cavity.
12.Remove the two (2) screws holding the fan duct to the top
base of oven cavity and one (1) screw holding the fan
duct to angle of oven cavity.
13.Release the wire leads from the hole of the fan duct.
14.Release the fan motor assembly from the oven cavity.
15.Remove the fan blade from the fan motor shaft according
to the following procedure.
16.Hold the edge of the rotor of the fan motor by using a pair
of groove joint pliers.
CAUTION:
• Make sure 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.
17.Remove the fan blade assembly from the shaft of the fan
motor by pulling and rotating the fan blade with your
hand.
18.Now, the fan blade will be free.
CAUTION:
• Do not re-use the removed fan blade because
the hole (for shaft) may be larger than normal.
19.Remove the two (2) screws holding the fan motor to the
fan duct.
20.Now, the fan motor is free.
Figure C-3. Turntable Motor Cover
Figure C-4. Washer and O-ring Installation and
Grease Applying.
Washer
O-ring
Base of turntable
motor shaft
Turntable motor
O-ring
Washer
Apply grease here
the bottom plate as shown in Figure C-3.
7. Re-install the turntable motor cover to the bottom plate
Screw: XHTSD40P08RV0 or
XFPSD40P08K00
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 to
the following procedure.
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 hard when installing
because the bracket may become disfigured.
• Make sure that the fan blade rotates smoothly after
installation.
• Make sure that the axis of the shaft is not slanted.
6. Install the fan motor assembly to the oven cavity by
fitting the two (2) holes of the fan duct into the tabs of
the top base of oven cavity.
7. Re-install the fan duct to the oven cavity with the six (6)
screws at same positions during removal.
8. Re-install the chassis support to the fun duct with the one
(1) screw.
9. Re-install the top separator to the fun duct with the one
(1) screw.
Gap
Rotor
Bracket
Stator
Groove joint pliers
Coil
Shaft
Axis
Stator
Rotor
These are the positions
that should be pinched
with pliers
Side View
Rear View
with one (1) screw XHTSD40P08RV0 or
XFPSD40P08K00 as shown in Figure C-3.