Alignment And Adjustments; High Voltage Transformer; Magnetron - Frigidaire PLMV178HC Service Manual

6. Alignment and Adjustments

PRECAUTION
1. High voltage is present at the high voltage terminals 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.

6-1 High Voltage Transformer

1. Remove connectors from the transformer terminals and
check continuity.
2. Normal resistance readings are as follows:
Secondary
Filament
Primary
(Room temperature = 20°C)

6-2 Magnetron

1. Continuity checks can indicate only an open filament or a
shorted magnetron. To diagnose an open filament or
shorted magnetron :
2. Isolate the magnetron from the circuit by disconnecting its
leads.
3. A continuity check across the magnetron filament terminals
should indicate one ohm or less.
4. A continuity check between each filament terminal and
magnetron case should read open.
SHV-U5164A
102 Ω + 2%
Shows Continuity
0.4 Ω + 2%
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