LG 50PG20 Training Manual page 30

SWITCHI MODE POWER SUPPLY Troubleshooting
SWITCHI MODE POWER SUPPLY Troubleshooting
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. Note: The 5V VCC is pre-adjusted and sealed.
•
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, Vscan, and Z Bias as they will vary from Panel to Panel.
Plasma Spring 2009
30
50PG20