P502 Main Board Connector to Power Supply Voltage and Diode Check
P502
P502 "MAIN Board" Connector To P201 "SMPS Board"
Pin
Label
STBY
Run Diode
Check
1
PWR-ON
0V
2.62V
2.89V
2-4
24V
0V
24.5V
OL
5-8
Gnd
Gnd
Gnd
Gnd
9 12
3 5V ST
3 55V
3 53V
1 15V
9-12
3.5V_ST
3.55V
3.53V
1.15V
13-15
Gnd
Gnd
Gnd
Gnd
16
GND/VSYNC
n/c
n/c
OL
17
12V
0V
12V
2.07V
18
INV-ON
0V
3.26V
1.53V
19
12V
0V
12V
2.07V
20
A-DIM
n/c
n/c
OL
21
12V
0V
12V
2.07V
Odd Pins Top Row
0
0
22
PDIM-1
0V
0.2V~3.3V
2.35V
23
n/c
n/c
n/c
OL
24
Err OUT
n/c
n/c
OL
(1)
PDIM Pin 22 can vary according to incoming video IRE level,
OSD Backlight setting and Intelligent Sensor (room light condition).
Range 0.2V to 3.3V.
P DIM1
May 2011 LCD TV 42LV5500
66
Diode Mode values taken with all Connectors Removed
P-DIM1
3.66V p/p 50IRE
