Power Supply Connector P201 Voltage And Diode Check - LG 32LD350 Troubleshooting Manual

Power Supply Connector P201 Voltage and Diode Check

Power Supply Connector P201 Voltage and Diode Check
P201 Connector "SMPS" to "Main" P402
Pin Label
(1)
1 PWR-ON
2-4 24V
5-8 GND
9-12 3.5V
13-15 Gnd
16 16 n/c n/c
17 12V
(2)
18 INV-ON
19 12V
(3)
20 ERROR
21 12V
(4)
22 A-DIM
23 23 n/c n/c
(5)
24 PWM-DIM
Diode Mode values taken with all Connectors Removed
STBY Run
0V 3.28V
0V 24.19V
Gnd Gnd
3.41V 3.41V
Gnd Gnd
n/c n/c n/c n/c
0V 11.97V
0V 3.32V
0V 11.97V
0V 0V
0V 11.97V
0.3V 4.49V
n/c n/c 0V 0V
0V 0.65V~3.25V
Diode
Check
1.16V
0.73V
Gnd
Open
(1) PWR_ON Pin 1 Turns on 12V, 24V
Gnd
to the Main and 24V to the Inverter
P203 Pins 1~5 P203 Pins 1~5.
Open Open
Open
(2) INV_ON Pin 18 (To P203 pin 12) Turns on the Backlights.
Open
(3) Error Pin 20 (From P203 pin 11 Silk Screened A-DIM)
Open
Goes high when the backlights are told to come on. Goes g
back low when they come on. If it goes high again on the 5th
Open
attempt to fire the backlights, the set shuts off.
Open
(4) A-DIM Pin 22 (To P203 pin 13 Silk Screened PWM-DIM) Is
Open
not used.
Open Open
(5) PWM-DIM Pin 24 (To P203 pin 14 Silk Screened
Open
Error_Out) can vary according to incoming video IRE level
and OSD Backlight setting Output from the Video Processor
IC100. Range 0.65V to 3.25V.
37
Press in gently on the two tabs
to release lock
Odd pins are
on the left.
g
November LCD TV 32LD350
P201