Service Manual
Model
Model
Model
Model No.:
No.:
No.:
No.: 75UF5550
75UF5550
75UF5550
75UF5550
4-2.
4-2.
4-2.
4-2. Mainboard
Mainboard
Mainboard
Mainboard
4-2-1.
4-2-1.
4-2-1.
4-2-1. Function
Function
Function
Function Description
Description
Description
Description
Process signal which incept from exterior equipment then translate into signal that panel can
display.
4-2-2.
4-2-2.
4-2-2.
4-2-2. Connector
Connector
Connector
Connector de
de
de
defi
fi
fi
finition
nition
nition
nition
14
14
14
14
IR
IR
IR
IR &
&
&
& Key
Key
Key
Key Interface
Interface
Interface
Interface
CND1
CND1
CND1
CND1
Pin
Pin
Pin
Pin number
number
number
number
Signal
Signal
Signal
Signal name
name
name
name
1
5V
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
Inverter
Inverter
Inverter
Inverter connector
connector
connector
connector CND2
CND2
CND2
CND2
Pin
Pin
Pin
Pin number
number
number
number
Signal
Signal
Signal
Signal name
name
name
name
1
12V
2
12V
3
BLO
4
ADJ
5
GND
6
GND
Speaker
Speaker
Speaker
Speaker connector
connector
connector
connector CNA3
CNA3
CNA3
CNA3
Pin
Pin
Pin
Pin number
number
number
number
Signal
Signal
Signal
Signal name
name
name
name
1
ROUT+
2
ROUT-
3
LOUT-
4
LOUT+