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R22AMM
10 – 2
13.Remove the cord bushing from the power supply cord,
14.Now, the power supply cord and rear cabinet are free.
[3] HIGH VOLTAGE TRANSFORMER(S) REMOVAL
1. CARRY OUT 3D CHECKS.
2. Remove the rear cabinet, too.
3. Disconnect wire lead(s) of high voltage transformer(s) from magne-
tron(s).
4. Remove the wire lead(s) of high voltage transformer(s) from the
wire holder.
5. Pull out the wire lead(s) of high voltage transformer(s) from the
tube.
6. Disconnect wire lead(s) of high voltage transformer(s) from high
voltage capacitor(s).
7. Disconnect the high voltage fuse(s) from high voltage trans-
former(s).
8. Disconnect the main wire harness from high voltage transformer(s).
9. Remove two (2) screws holding each power transformer to base
plate.
10.Remove the high voltage transformer(s) from base plate.
11.Now, high voltage transformer(s) are free.
[4] MAGNETRON(S) REMOVAL
1. Removal
1. CARRY OUT 3D CHECKS.
2. Remove the rear cabinet, too.
3. Remove the two (2) screws holding magnetron exhaust duct to
upper and lower waveguide.
4. Remove the magnetron exhaust duct from oven cavity.
5. Disconnect wire leads from magnetron(s).
6. Disconnect magnetron thermistor from the connector of the stop
switch harness.
7. Remove the one (1) screw holding the thermistor angle to the
upper magnetron.
8. Remove the four (4) screws holding each magnetron to upper and/
or lower waveguide. When removing the screws, hold the magne-
tron to prevent it from falling.
tron to prevent it from falling.
9. Remove the magnetron(s) from upper and/or lower waveguide with
care so magnetron antenna is not hit by any metal object around
antenna.
antenna.
10.Pull out the thermistor angle from the upper magnetron.
11.Now, the magnetron(s) is (are) free.
CAUTION: WHEN REPLACING MAGNETRON, BE SURE THE R.F.
GASKET IS IN PLACE AND MOUNTING SCREWS ARE
TIGHTENED SECURELY.
TIGHTENED SECURELY.
NOTE: When the magnetron MG1 and/or MG2 is replacing, the
relays (RY3 and RY4) on control unit must be replaced at
the same time. Because if the magnetron's life has been
over, the relay's life may also be over.
the same time. Because if the magnetron's life has been
over, the relay's life may also be over.
[5] MAGNETRON THERMISTOR REPLACEMENT
1. Removal
1. CARRY OUT 3D CHECKS.
2. Remove the rear cabinet, too.
3. Remove the magnetron from the waveguide flange, referring to
“MAGNETRON(S) REMOVAL”.
4. Now, the magnetron with the magnetron thermistor should be free.
5. Remove the thermistor angle from the magnetron by pulling out.
6. Straighten the tab of the magnetron thermistor angle holding the
magnetron thermistor.
7. Remove the magnetron thermistor from the thermistor angle.
8. Now, the magnetron thermistor is free.
2. Re-install
1. Install the magnetron thermistor to the thermistor angle as shown in
Figure C-1.
2. Hold the magnetron thermistor to the thermistor angle by bending
the tab of the thermistor angle.
3. Insert the thermistor angle between the 2nd. fin and 3rd. fin from
the upper fin of the magnetron and push it until the thermistor angle
stops.
stops.
NOTE: The magnetron thermistor should be between the upper fin
and the 2nd. fin.
4. Re-install the magnetron to the waveguide flange with four (4)
screws.
5. Re-install the thermistor angle to the waveguide flange with one (1)
screw.
6. Re-install the magnetron exhaust duct to the upper and lower
waveguide flanges with two (2) screws.
7. Route the thermistor harness under the magnetron temperature
fuse.
8. Connect the thermistor harness to the stop switch harness.
9. Connect the wire leads to the upper magnetron, referring to the pic-
torial diagram.
10.Re-install the power supply cord, rear cabinet and outer case cabi-
net to the oven by reversing the procedures of “OUTER CASE,
REAR CABINET AND POWER SUPPLY CORD REMOVAL”.
REAR CABINET AND POWER SUPPLY CORD REMOVAL”.
Figure C-1. Magnetron thermistor installation
Upper magnetron
Upper fin
T ab
T hermis tor
angle
angle
Magnetron
thermis tor
thermis tor
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