LG 50PJ340 Training Manual - Page 57

Y-SUS Board P212 to Lower Y-Drive P205 Logic Signals Explained, FGnd

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Y-SUS Board P212 to Lower Y-Drive P205 Logic Signals Explained c FGnd P205 P212 c c Y-Drive Lower Y-SUS Board P212 Connector Pin Label 17 SUS_DN (FG) 16 FG5V 15 FG5V 14 SUS_DN (FG) 13 SUS_DN (FG) 12 YB_CLK 11 YB_CLK 10 YB_STB 9 YB_STB 8 YTB_OC1 7 YTB_OC1 6 YT_DATA 5 YT_DATA 4 YB_OC2 3 YB_OC2 2 SUS_DN (FG) 1 SUS_DN (FG) Pins 3~12 (4mSec per/div) The signal for these pins look very similar due to the fact they are read from Chassis Gnd, but they are actually Floating Ground related. DO NOT hook scope Gnd to Floating Gnd TP without an Isolation Transformer. All logic pins about (400V p/p) Pins 3~12 are Logic (Drive) Signals to the Y-Drive Upper. 57 July 2010 50PJ350 Plasma

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57
July 2010
50PJ350
Plasma
Y
-
SUS Board P212 to Lower Y
SUS Board P212 to Lower Y
-
Drive P205 Logic Signals Explained
Drive P205 Logic Signals Explained
Pins 3~12
(4mSec per/div)
All logic pins about (400V p/p)
The signal for these pins look very similar
due to the fact they are read from Chassis Gnd,
but they are actually Floating Ground related.
DO NOT
hook scope Gnd to Floating Gnd TP
without an Isolation Transformer.
Y-Drive Lower
Y-SUS Board
Pins 3~12 are Logic (Drive) Signals to the Y-Drive Upper.
FGnd
P205
P212
SUS_DN (FG)
1
SUS_DN (FG)
2
YB_OC2
3
YB_OC2
4
YT_DATA
5
YT_DATA
6
YTB_OC1
7
YTB_OC1
8
YB_STB
9
YB_STB
10
YB_CLK
11
YB_CLK
12
SUS_DN (FG)
13
SUS_DN (FG)
14
FG5V
15
FG5V
16
SUS_DN (FG)
17
Label
Pin
P212 Connector