Mainboard Mainboard Mainboard; Function Description; Connector Definition - Haier 75UF5550 Service Manual

Service Manual
Model No.: 75UF5550
Model Model Model No.: No.: No.: 75UF5550 75UF5550 75UF5550
4-2. Mainboard 4-2. 4-2. 4-2. Mainboard Mainboard Mainboard
4-2-1. Function Description
4-2-1. Function 4-2-1. 4-2-1. Function

Function Description

Description Description
Process signal which incept from exterior equipment then translate into signal that panel can
display.
4-2-2. 4-2-2. Connector Connector
4-2-2. Connector 4-2-2. Connector de
IR IR IR IR & & & & Key Key Key Interface Key
CND1 CND1
CND1 CND1
Pin Pin number number
Pin Pin number number
5V
1
2 RED
3 GRE
4 IR
5 GND
6 K0
7 K1
8 K2
9 K3
10 K4
11 K5
12 K6
13 K7
14 GND
14 14
14 14
defi fi fi finition de de nition nition
nition
Interface Interface Interface
Signal Signal name name
Signal name Signal name
Inverter Inverter Inverter Inverter connector connector connector connector CND2
Pin Pin number number Signal Signal
Pin Pin number number Signal name Signal
12V
1
12V
2
BLO
3
ADJ
4
GND
5
GND
6
Speaker Speaker connector connector
Speaker Speaker connector connector CNA3
Pin Pin Pin number Pin number number number Signal Signal Signal Signal name
ROUT+
1
2 ROUT-
3 LOUT-
4 LOUT+
CND2 CND2 CND2
name name
name
CNA3 CNA3
CNA3
name name name