Main Board Connector P402 to Power Supply Voltage and Diode Check
Main Board Connector P402 to Power Supply Voltage and Diode Check
P402 “Main Board" to P201 “SMPS"
P402
Di d
Odd Pins are Top Row
Pin
Label
STBY
Run
Diode
Check
1
(1)
PWR-ON
0V
3.28V
1.16V
2-4
24V
0V
24.19V
0.73V
5-8
Gnd
Gnd
Gnd
Gnd
9-12
3.5V
3.41V
3.40V
Open
13-15
Gnd
Gnd
Gnd
Gnd
16
n/c
n/c
n/c
Open
(1) PWR-On
Pin 1:
Turns on 12V, 24V to the Main and 24V to
the Inverter P203 Pins 1~5.
(2) INV-On
Pin 18:
p
17
12V
0V
11.96V
Open
18
(2)
INV-ON
0V
3.32V
Open
19
12V
0V
11.96V
Open
20
(3)
ERROR
0V
0 59V
O
Turns on the Backlights
(3) Error_Out
Pin 20:
(Silk Screened A-DIM) Goes high (3.3V)
when the backlights are told to come on.
G
b k l
h
th
li ht
20
(3)
ERROR
0V
0.59V
Open
21
12V
0V
11.96V
Open
22
(4)
A-DIM
0.3V
4.49V
Open
23
n/c
n/c
n/c
Open
Goes back low when they light.
If it goes high again on the 5th attempt to fire
the backlights, the set shuts off.
(4) A-DIM
Pin 22:
(Silk Screened P-DIM) Is not used
24
(5)
P-DIM
0V
0.65V~3.25V
Open
(Silk Screened P DIM) Is not used.
(5) P-DIM
Pin 24
(Silk Screened Error_Out) can vary
according to incoming video IRE level and
OSD Backlight setting Output from the
November LCD TV 32LD350
55
Diode Mode values taken with all Connectors Removed
Video Processor IC100. Range 0.65V to
3.25V.
