LG 42PQ20 Training Manual page 47

Y - SUS PWB SECTION (Overview)
Y - SUS PWB SECTION (Overview)
Y-SUS Board develops the Y-Scan to the Y-Drive boards.
This Section of the Presentation will cover troubleshooting the Y-SUS Board for the Single
Scan Plasma. Upon completion of the Section the technician will have a better
understanding of the operation of the circuit and will be able to locate voltage and
resistance test points needed for troubleshooting and alignments.
• Adjustments
• DC Voltage and Waveform Checks
• Resistance Measurements
Operating Voltages
Operating Voltages
SMPS Supplied
Y-Z SUS Developed
Floating Ground
VA supplies the Panel Vertical Grid (Routed to the X-Boards)
VA
VS
VS Supplies the Panel Horizontal Grid (Also routed to the Z-SUS)
M5V
5V Supplies Bias to Y-Z SUS, (Routed to the Control Board)
-VY VR502 -VY Sets the Negative excursion of the Y SUS Drive Waveform
VSC VR501 VSC Set the amplitude of the complex waveform.
V SET UP VR601 Ramp UP sets amplitude of the Top Ramp of the Drive Waveform
V SET DN VR602
V Set Down sets the Pitch of the Bottom Ramp of the Drive Waveform
15V To the Control Board then routed to the Z-SUS board
5V Used on the Y-Drive boards
47 January 2009 Plasma 42PQ20