LG 42LH90 Manual page 77

Main Board Connector P700 to Power Supply Voltage and Diode Chec
Main Board Connector P700 to Power Supply Voltage and Diode Chec
Pin
23
P700
1
21
19
17
15
13
11
9
7
5
3
1
1
ADIM Pin 21 Fixed and not used.
It is an Open connection on the Inverter Board.
Diode Mode values taken with all Connectors Removed
Odd Pins
Label STBY Run
nc nc nc
A.DIM 0.47V 1.66V
nc nc nc
24V 0V 24V
Gnd Gnd Gnd
12V 0V 12V
Gnd Gnd Gnd
5.2V 5.15V 5.15V
5.2V 5.15V 5.15V
Gnd Gnd Gnd
Gnd Gnd Gnd
nc nc nc
P700 "Main Board" to P201 "SMPS"
Diode
Pin
Check
Open 24
Open 22
Open 20
Open 18
Gnd 16
2.2V 14
Gnd 12
1.1V 10
1.1V 8
Gnd 6
Gnd 4
Open 2
2
PDIM Pin 24 can vary according to type of signal
being processed, OSD Backlight setting. 0.6V 0%
to 3.3V 100% and the Intelligent Sensor. Output
from the Video Processor IC100.
77
Even Pins
Label STBY
2
PDIM 0V
Err Out 0V
Inv_On 0V
24V 0V
Gnd Gnd
12V 0V
Gnd Gnd
5.2V 5.15V
5.2V 5.15V
Gnd Gnd
Gnd Gnd
PWR-ON 0V
February 2010 LCD DV
k
k
Diode
Run
Check
2.43V 1.3V
0V Open
4.65V 2.9V
24V Open
Gnd Gnd
12V 2.2V
Gnd Gnd
5.15V 1.1V
5.15V 1.1V
Gnd Gnd
Gnd Gnd
5V 2.6V
42LH90