LG 50PQ30 Training Manual page 43

Y - SUS BOARD SECTION
Y - SUS BOARD SECTION
Y-SUS Board develops the V-Scan drive signal 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
Diode mode test points needed for troubleshooting and alignments.
• Adjustments
• DC Voltage and Waveform Checks
• Diode Mode Measurements
Operating Voltages
Operating Voltages
SMPS Supplied
Y-SUS Developed
Floating Ground
(Overview)
(Overview)
VA VA supplies the Panel Vertical Electrodes (Routed to the Left X-Board)
VS
VS Supplies the Panel Horizontal Electrodes (Also routed to the Z-SUS board)
M5V
5V Supplies Bias to Y-SUS (Then Routed to the Control board and Z-SUS 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 SET UP sets amplitude of the Top Ramp of the Drive Waveform
V SET DN VR602 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
FG 5V Used on the Y-Drive boards (Measured from Floating Gnd)
FG 15V
Used in the Development of the V-Scan signal (Measured from Floating Gnd)
43 November 2009 50PQ30 Plasma