Emerson LC320EM1 Service Manual page 67

Inverter CBA, Function CBA, IR Sensor CBA & Junction CBA Bottom View
Junction CBA
Not Used IR Sensor CBA
Inverter CBA
Because a hot chassis ground is present in the power supply
circuit, an isolation transformer must be used when repairing.
Also, in order to have the ability to increase the input slowly,
when troubleshooting this type of power supply circuit,
a variable isolation transformer is required.
Not Used
NOTE:
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
Function CBA
10-25
BA01F4F01031