LG 50PJ340 Training Manual - Page 34
Switch Mode Power Supply Overview - 50pj350 audio output
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Switch Mode Power Supply Overview The Switch Mode Power Supply Board Outputs to the : VS Y-SUS Board VA M5V Drives the Display Panel's Horizontal Electrodes. To Y-SUS, fused then to the X-Boards. (Not used by Z-SUS). Primarily responsible for Display Panel Vertical Electrodes. Used to develop Bias Voltages on the Y-SUS then routed to the Control board and then to the Z-SUS Board. Z-SUS Board VS VS is routed to the Y-SUS first then to the Z-SUS board which Drives the Display Panel's Horizontal Electrodes. Main Board STBY 5V Microprocessor Circuits 17V Audio B+ Supply, Tuner B+ Circuits 5V Signal Processing Circuits Also AC_Det (if missing, shuts of TV in 10 seconds) and Error_Det (not used) Adjustments There are 2 adjustments located on the Power Supply Board VA and VS. The M5V is pre-adjusted and fixed. All adjustments are made referenced to Chassis Ground. Use "Full White Raster" 100 IRE VS VR901 VA VR502 34 July 2010 50PJ350 Plasma