4-2-1. Function Description:
Main Board
Process signal which incept from exterior equipment then translate into signal that panel can display.
4-2-2. Connector definition
Main board connector
Speaker connector (CN27)
Pin number
Signal name
1
LOUT+
2
LOUT-
3
ROUT-
4
ROUT+
12V/5V Connector (CN10)
Keypad Connector (CNB3)
Pin number
Signal name
1
+12V
2
+12V
3
GND
4
+12V
5
GND
6
GND
7
5VSTB
8
/
9
GND
10
PW-ON/OFF
11
PB-ADJUS
12
PB-ON/OFF
Pin number
Signal name
1
GND
2
KEY1
3
KEY0
4
3.3VS
Rom connector (CNB4)
Pin number
Signal name
1
5VS
2
IR
3
LED-R
4
LED-G
5
GND
4-3. Power Supply Board
Service Manual
Model No.: LET40T3
14