Switch Mode Power Supply Overview; Main Board - LG 50PG20 Training Manual

Switch Mode Power Supply Overview

Switch Mode Power Supply Overview
The Switch Mode Power Supply Board Outputs to the :
Y SUS Board
And
Z SUS Board

Main Board

Adjustments
VS Drives the Display Panel Horizontal Grid
VA Primarily responsible for Display Panel Vertical Grid
M5V VCC
Used to develop Bias Voltages on the Y SUS, Z SUS,
X Drive, and Control Boards
16V Audio B+ Supply
12V Signal Processing Circuits and Fan Drive
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
RV902
33
Plasma Spring 2009 50PG20