Power Supply Connector Voltage And Diode Check - LG 55LW5600 Troubleshooting Manual

P201 Power Supply Connector Voltage and Diode Check
P201 Connector "SMPS Board" To P502 "MAIN Board"
Pin Label
24 ERROR
23 n/c
22 PWM
21 12V
20 n/c
19 12V
18 DRV-ON
17 12V
16 V-SYNC
13~15 Gnd
9~12 3.5V
5~8 5 8 Gnd Gnd
2~4 24V
1 PWR-ON
(1) PWR ON Pi 1 t (1) PWR_ON Pin 1 turns on the SMPS which send 12V and
24V to the Main. The 63V Power Supply turns on too, but
only generates 56V at this time.
Diode Mode values taken with all Connectors Removed
STBY Run
n/c n/c
n/c n/c
0V 0.2V~3.3V
0V 12.07V
n/c n/c
0V 12.07V
0V 3.24V
0V 12.07V
n/c n/c
Gnd Gnd
3.56V 3.51V
Gnd Gnd Gnd Gnd
0V 25V
0V 3.4V
th SMPS hi h d 12V
P201 Connector
Diode Check
2.2V
n/c
OL
0.48V
n/c
0.48V
OL
0.48V
n/c
Gnd
OL
Gnd Gnd
1.1V
1.16V
(3) PDIM1 Pin 22 can vary according to incoming video IRE
level, OSD Backlight setting and then Intelligent Sensor
d
(room light condition) Output from the Video Processor
IC900. Range 0.37V to 3.3V.
.
July 201 1 LCD TV
62
Odd pins
are on top
row
g g
P-DIM1
3.66V p/p 50IRE 3 66V p/p 50IRE
55LW56000
1
g