Philips 32PFL3505D/F7 Service Manual page 77

Inverter CBA, Function CBA, IR Sensor CBA & Junction CBA Bottom View
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.
Junction CBA [TYPE A, TYPE B]
Not Used IR Sensor CBA
Inverter CBA
NOTE:
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
Not Used
10-23
Function CBA
BA01F2F01031