LG 42PW350 - Y-Drive Board Layout

Key Points of interest are;
Y-Drive Board Layout
Key
Points
of
interest
are;
There are 6 FPC (Flexible Ribbon Cables)
connecting the Y-Drive board to the Panel. These
FPC connect to a total of 1080 individual
l t d d t i i V ti l l ti
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ec
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ro
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es
d
e
t
erm
i
n
i
ng
V
er
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reso
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ti
on.
Floating Ground is delivered to the Y-Drive board
via all 3 connectors. P101 is only FG.
Y
S d VPP
dli dt th Y
Di
Y-DRIVE
BOARD
P101 All Pins
Floating Ground
Y
-
S
can an
d
VPP
are
d
e
li
vere
d
t
o
th
e
Y
-
D
r
i
ve
board by P106.
The Y-Drive board operates from Floating Ground,
(no reference to Chassis Gnd
). However, when
P102 top 10 pins FG
(no
reference
to
Chassis
Gnd
).
However,
when
reading the Y-Drive Waveform with a scope, use
chassis ground only.
Floating Gnd 5V can be measured across C18 or
C523 f t l t l ti
it
Bottom 2 pins FG5
V
P106
Top 2 pin Y-Scan
Pins 10
~
9 VPP
C523
sur
f
ace moun
t
e
l
ec
t
ro
l
y
ti
c capac
it
ors or
Fuse FL1 next to P102.
Pins
10 9
VPP
Pins 1~6 Logic (Scan
Control signals
June 2011 42PW350 Plasma
101