– 62 –
•
Location (See
Right Side View
.)
• The transformer steps up 120 VAC line voltage to
high voltage, which is then changed to an even
higher DC voltage by the Capacitor and Diode.
• WARNING:
Always be certain the capacitor
is discharged before servicing. (See
Capacitor
and Diode
.
) Use electrician's discharge pliers
and electrician's gloves under Kevlar gloves (or
equivalent protective gloves) when discharging
the capacitor.
• Note:
The capacitor has an internal discharge
resistor that automatically discharges the
capacitor when the oven turns off. Under normal
operation, the capacitor should fully discharge
within 30 seconds.
• For operating algorithms, see
Load Algorithm
Chart
,
High Voltage.
• Disassembly.
(See
Disassembly
.)
Troubleshooting
To troubleshoot High Voltage Transformer primary
voltage, see
Magnetron
troubleshooting section. To
test the High Voltage Transformer:
Check the following resistances:
Red to Yellow (primary) - .5
Ω
Red/Black to chassis ground (secondary) - 80
Ω
Magnetron harness (
fi
lament high voltage) - .2
Ω
If resistance values are correct, High Voltage
Transformer is OK.
High Voltage Transformer
Disassembly
To remove the High Voltage Transformer:
1. Remove the Outer Cover. (See
Outer Cover
.)
2. Remove the Bottom Cover. (See
Bottom Cover
.)
3. Remove the 4 Phillips-head screws that attach
the transformer to the baseplate.
Before disconnecting the primary and secondary
wire connections, note the wire locations. The wire
connectors are
fi
rmly attached and DO NOT use
releasing locking tabs.
