LG 50PJ340 Training Manual - Page 33
Switch Mode Power Supply - 50pj350 parts
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SWITCH MODE POWER SUPPLY SECTION This Section of the Presentation will cover troubleshooting the Switch Mode Power Supply for the Single Scan Plasma. Upon completion of the section the technician will have a better understanding of the operation of the Power Supply Circuit and will be able to locate voltage and test points needed for troubleshooting and alignments. • DC Voltages developed on the SMPS • Adjustments VA and VS. Always refer to the Voltage Sticker located on the back of the panel, in the upper Left Hand side for the correct voltage levels for the VA, VS, -VY, VSC, and Z Bias as these voltages will vary from Panel to Panel even in the same size category. Set-Up and Ve are just for Label location identification and are not adjusted in this panel. SMPS p/n: EAY60968701 Check the silk screen label on the top center of the Power Supply board to identify the correct part number. (It may vary in your specific model number). On the following pages, we will examine the Operation of this Power Supply. 33 July 2010 50PJ350 Plasma