LG 42PW350 - CONTROL BOARD SECTION; Control Board Signals; Control Board Operating Voltages

CONTROL BOARD SECTION
This Section of the Presentation will cover troubleshooting the Control Board Assembly. Upon
completion of this section the Technician will have a better understanding of the circuit and be
able to locate voltage and diode mode test points needed for troubleshooting
• DC Voltage and Waveform Test Points
• Diode Mode Test Points
SIGNALS
able
to
locate
voltage
and
diode
mode
test
points
needed
for
troubleshooting
.
SIGNALS
Main Board Supplied Panel Control and LVDS (Video) Signals
Control Board Generated
Y-SUS and Z-SUS Drive Signals (Sustain)
X
BdDiSi l(RGBAdd )
+5V (M5V) Developed on the SMPS
OPERATING VOLTAGES
X
B
oar
d
D
r
i
ve
Si
gna
l
s
(RGB
Add
ress
)
From the Y-SUS Supplied
+18V (Routed through the Control board to the
Z-SUS)
(Not used by the Control Board)
Develo
p
ed on the Control Board
+
1.0V (IC703) for internal use
p
1.0V
(IC703)
for
internal
use
+1.8V (IC701) for internal use
+3.3V (IC53) for internal use and
for the X-Boards (TCPs)
June 2011 42PW350 Plasma
111