LG 42PG20 - Y-SUS PWB SECTION (Overview)

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Plasma Fall 2008 42PG20
This Model “Combines” the Y and Z SUS Drive PWB together.
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.
Operating
Operating
Voltages
Voltages
SMPS Supplied VA
VS
VCC M5V
Y-Z SUS Developed -VY
V SET UP VR602
V SET DN VR601
VSC
16V
VA supplies the Panel Vertical Grid
VS Supplies the Panel Horizontal Grid
5V Supplies Bias to Y-Z SUS, Control via the Y-SUS
-VY Sets the Negative excursion of the Y SUS Drive Waveform
Ramp UP sets Pitch of the Top Ramp of the Drive Waveform
V Set Down sets the Pitch of the Bottom Ramp of the Drive Waveform
VSC Set the amplitude of the complex waveform.
To the X-Drives PWB and the TCP IC’s
Y
Y
-
-
SUS PWB SECTION (Overview)
SUS PWB SECTION (Overview)
• Adjustments
• DC Voltage and Waveform Checks
• Resistance Measurements