Y - Sus Board Section - LG 42PJ350 Training Manual

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 alignment and 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
SMPS Supplied
Y-SUS Developed
Floating Ground
(Overview)
(Overview)
VA supplies the Panel's Vertical Electrodes (Routed to the Left X-Board)
VA
VS VS Supplies the Panel's Horizontal Electrodes. Also Routed to the Z-SUS board.
M5V
M5V Supplies Bias to Y-SUS. (Also routed to the Control Board then Z-SUS).
-VY VR502 -VY Sets the Negative excursion of Reset in the Drive Waveform
VSC VR501 VSC Sets the amplitude of the complex waveform.
V SET UP VR601 SET UP sets amplitude of the Top Ramp of Reset in the Drive Waveform
V SET DN VR401 SET DOWN sets the Pitch of the Bottom Ramp for Reset in the Waveform
18V Used internally to develop the Y-Drive signal. (Also routed to the Control Board
then routed to the Z-SUS board).
FG 5V Used on the Y-Drive board (Measured from Floating Gnd)
FG 15V Used in the Development of the Y-Drive Waveform (Measured from Floating Gnd)
44 August 2010 42PJ350 Plasma