High Voltage Transformer; High Voltage Capacitor - Panasonic NE-3280 Service Manual

NE-3280 / NE-3240 / NE-2180 / NE-2140
14.7. Replacement of temperature
sensor (Thermal protector)
1. Cut 2 lead wires at the top of sensor terminals.
2. Remove 2 screws holding temp sensor and replace with
new one.
3. Solder the lead wires securely to the sensor terminals.
14.8. Replacement of antenna
motors (upper and lower)
1. The upper antenna
disconnecting the lead wire connectors and removing its 2
mounting screws.
15 COMPONENT TEST PROCEDURE
1. High voltage is present at the high voltage terminal of the high
voltage transformer during any cook cycle.
2. It is neither necessary nor advisable to attempt measurement of
the high voltage.
3. Before touching any oven components, or wiring, always unplug
the oven from its power source and discharge the high voltage
capacitor.

15.1. High voltage transformer

1. Remove connections from the transformer terminals and
check continuity.
2. Normal (cold) resistance readings should be as follows:
Secondary winding Approx. 40Ω — 100Ω
Filament winding Approx. 0Ω
Primary winding Approx. 0Ω — 3Ω

15.2. High voltage capacitor

1. Check continuity of capacitor with meter on highest OHM
scale.
2. A normal capacitor will show continuity for a short time, and
then indicate 9MΩ once the capacitor is charged.
3. A shorted capacitor will show continuous continuity.
4. An open capacitor will show constant 9MΩ.
motor may by removed
CAUTION
2. To remove the lower antenna motor, carefully place the unit
on its left side.
3. Remove the motor cover by removing 2 screws and follow
same procedure as for upper antenna.
There are two types of antenna motors Therefore please replace with
correct one as showing below.
Upper
Antenna
Motor
Lower
Antenna
Motor
by
5. Resistance between each terminal and chassis should be
infinite.
15.3. Magnetron
Continuity checks can only indicate an open filament or a
shorted magnetron. To diagnose for an open filament or
shorted magnetron.
1. Isolate magnetron from the circuit by disconnecting the
leads.
2. A continuity check across magnetron filament terminals
should indicate one ohm or less.
3. A continuity check between each filament terminal and
magnetron case should read open.
22
CAUTION
PART NO.:
ANE61446030AP
(RATED: 120V)
PART NO.:
A6144-3280
(RATED: 120V)