Vizio VX42L HDTV10A Service Manual page 49

1. Input configuration
The TDA8946AJ inputs can be driven symmetrical (floating) as well as asymmetrical.
In the asymmetrical mode one input pin is connected via a capacitor to the signal
source and the other input is connected to the signal ground. The signal ground should
be as close as possible to the SVR (electrolytic) capacitor ground. Note that the DC
level of the input pins is half of the supply voltage VCC, so coupling capacitors for both
pins are necessary
2. Output power measurement
The output power as a function of the supply voltage is measured on the output pins at
THD = 10%,in the L32 LCD TV Vcc=12V so we can see as shown in the following
figure output about 7W.
CONFIDENTIAL – DO NOT COPY Page 7-18
File No. SG-0211