LG 42PW350 - Y-SUS BOARD SECTION (Overview); Y-SUS Board Operation and Testing; Y-SUS Operating Voltages

Y-SUS Board develops the V-Scan drive signal to the Y-Drive boards.
Y-SUS BOARD SECTION (Overview)
p/n: EBR68341901
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
Diode
mode
test
points
needed
for
troubleshooting
and
alignments
.
• Adjustments
• DC Voltage and Waveform Checks
• Diode Mode Measurements
Operating Voltages
Z-SUS Supplied
From SMPS
VS Supplies the Panel’s Horizontal Electrodes. (Routed from the Z-SUS board).
M5V
SliBitY
SUS (Al t d t th C t l B d th Z
SUS)
From
SMPS
Y-SUS Developed -VY VR502
V SET UP VR601
V SET DN VR401
M5V
S
upp
li
es
Bi
as
t
o
Y
-
SUS
.
(Al
so rou
t
e
d
t
o
th
e
C
on
t
ro
l
B
oar
d
th
en
Z
-
SUS)
.
-VY Sets the Negative excursion of Reset in the Drive Waveform.
SET UP sets amplitude of the Top Ramp of Reset in the Drive Waveform.
SET DOWN sets the Pitch of the Bottom Ramp for Reset in the Waveform.
Used internally to develop the Y
-
Drive signal (Also routed to the Control Board
18V / VSC
Floating Ground FG 5V
FG 15V
Used
internally
to
develop
the
Y
Drive
signal
.
(Also
routed
to
the
Control
Board
then routed to the Z-SUS board).
Note: There is no VSC or 18V adjustment on this model.
Used on the Y-Drive board (Measured from Floating Gnd)
Used in the Development of the Y-Drive Waveform (Measured from Floating Gnd)
June 2011 42PW350 Plasma
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