Run Capacitor, Power Transformer, Magnetron Fan - GE SpaceMakerXL JMV1420 Technical Service Manual

RUN CAPACITOR
The run capacitor is located behind the control panel. The
capacitor is used for more torque and electrical phasing.
Without the capacitor the blower might run but would
be much slower.
To Test the Capacitor:
1. Remove grille, discharge capacitor and disconnect one
capacitor lead.
2. Make capacitor check (with analog meter - needle should
rise & fall, cap is charging then discharging).
EXHAUST
FAN MOTOR
POWER TRANSFORMER
REPLACEMENT
The high voltage power transformer
can be serviced by
removing unit from its installation.
Remember, discharge the high voltage capacitor!
There are very dangerous high voltages present at the high
voltage terminal. Do not attempt to measure the filament or
high voltage
Check power transformer by making continuity checks
across the filament, primary, and secondary windings. All of
them should have continuity.
To Replace Power Transformer:
1. Remove unit from installation.
2. Remove 4 screws that mount HV transformer to cavity.
3. Swing out bracket.
4. Lower vertical housing.
5. Detach wires including HV transformer.
6. Remove 4 screws that mount HV transformer.
MAGNETRON
BLOWER
MOTOR
REMOVE SCREW
TO LOWER
CONTROL
PANEL
MAGNETRON FAN
The magnetron fan motor drives a blade which draws in
cool external air. This cool air is directed through the air
vanes surrounding the magnetron and cools the mag
assembly. Most of the air is then exhausted directly
through the vents. The magnetron blower is located
behind the magnetron and above the high voltage trans-
former.
To service this component unit must be removed from
installation and cover removed.
To Replace Magnetron Fan:
I .Disconnect power, remove adapter assembly if
vertical exhaust.
2. Follow steps 1-5 in removing power transformer.
3. Disconnect motor leads and ground wire.
4. Remove plastic housing - I screw at top middle and
release tabs in front by the latch switches.
5. Disconnect 120V supply to HV transformer.
6. Remove two screws holding fan housing in place.
25
REMOVE SIDE PANEL TO
ACCESS HI-VOLTAGE
TRANSFORMER AND
MAGNETRON
FAN TCO
EXHAUST FAN
CAPACITOR
TURNTABLE
MOTOR
RECEPTICALS
FOR COOKTOP
LIGHT
MAGNETRON & HV TRANSFORMER
ARE MOUNTED BEHIND BLOWER
MOTOR. (NO FRONT ACCESS)
4 MOUNTING
SCREWS FOR
HV TRANSFORMER
4 MOUNTING
SCREWS FOR
HV TRANSFORMER