©2018 ACP, Inc.
Cedar Rapids, IA 52404 Page 61 of 80
Part No. 16400033
Original Instructions
HV Transformer
HV Transformer
⚠
DANGER
The high voltages and currents at the lament and secondary winding of the transformer are extremely dangerous.
Never make any direct voltage or current measurements at these winding. It is very dangerous to work near this part
when the oven is on, or if this circuitry has been switched o.
⚠
DANGER
All High Voltage Capacitors must be discharged before performing this procedure.
The HV Transformer has 2 purposes. It steps up the line voltage to the high voltage needed to power the Magnetron
and it steps down the line voltage to supply the low voltage needed by the Magnetron Filament.
Testing
Remove Wires from the device.
Resistance:
Com to 208 = <2Ω
Com to 230 = <2Ω
5 to 6 = <1Ω
Com to Ground = Open
208 to Ground = Open
230 to Ground = Open
5 to Ground = Open
6 to Ground = Open
4 to Chassis/Ground ≈ 62.5Ω ± 5%
Removal and Replacement
1. Disconnect oven from Power Supply.
2. Remove top, right, left and rear Panels
(see Panel Removal).
3. Discharge HV Capacitors.
4. Remove Wires from device.
5. From the bottom of the oven, remove the four (4) Screws
securing the device with a 1/4” Socket.
6. To replace, reverse these steps.
⚠
DANGER
⚠
DANGER
Bottom of Unit
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