LG 42PQ30 Training Manual page 34

Switch Mode Power Supply Overview
Switch Mode Power Supply Overview
The Switch Mode Power Supply Board Outputs to the :
Y-SUS Board
Main Board
Adjustments
VS
Drives the Display Panel Horizontal Grid
VA Primarily responsible for Display Panel Vertical Grid
Used to develop Bias Voltages on the Y-SUS,
M5V VCC
X Drive, and Control Boards
16V Audio B+ Supply
5V Signal Processing Circuits
There are 2 adjustments located on the Power Supply Board VA and VS. The
5V VCC is pre-adjusted and fixed. All adjustments are made with relation to
Chassis Ground. Use "Full White Raster" 100 IRE
RV901
VA
VS
RV951
34
Preliminary Information 42PQ30