LG 42LV5500 Training Presentation page 66

P502 Main Board Connector to Power Supply Voltage and Diode Check
P502
Odd Pins Top Row
(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.
Diode Mode values taken with all Connectors Removed
P502 "MAIN Board" Connector To P201 "SMPS Board"
Pin Label
1 PWR-ON
2-4 24V
5-8 Gnd
9-12 9 12 3 5V ST 3.5V_ST
13-15 Gnd
16 GND/VSYNC
17 12V
18 INV-ON
19 12V
20 A-DIM
21 12V
22 PDIM-1
23 n/c
24 Err OUT
STBY Run
0V 2.62V
0V 24.5V
Gnd Gnd
3 55V 3.55V 3 53V 3.53V
Gnd Gnd
n/c n/c
0V 12V
0V 3.26V
0V 12V
n/c n/c
0V 0 12V
0V 0.2V~3.3V
n/c n/c
n/c n/c
P-DIM1 P DIM1
3.66V p/p 50IRE
May 201 1 LCD TV 42LV5500
66
Diode Check
2.89V
OL
Gnd
1.15V 1 15V
Gnd
OL
2.07V
1.53V
2.07V
OL
2.07V 0
2.35V
OL
OL