22
12. Circuit Explanation
IC reference data:
1). N701 (LC86F3248A)
Pin
No.
function
voltage
(
V
)
Pin
No.
function
voltage
(
V
)
1
n.c
22
R-input
0.06
2
Connect to 5V via a
resistor
5.03
23
G-input
0.06
3
Connect to 5V via a
resistor
5.03
24
B-input
0.07
4
Connect to 5V via a
resistor
5.04
25
Blank
0.15
5
Connect to 5V via a
5.03
26
n.c.
0.01
6
Connect to 5V via a
resistor
5.03
27
I2C bus control 0
4.85
7
standby
0.03
28
I2C bus control 0
4.79
8
n.c.
0
29
I2C bus control 1
5
9
Ground
0
30
I2C bus control 1
4.99
10
Scl
1.47
31
Connect to 5V via a
resistor
5.03
11
sdl
2.2
32
Connect to 5V via a
onnect to 5V via a resisto
5.04
12
Power supply
4.99
33
Connect to 5V via a
resistor
5.03
13
Key input
0.24
34
Infrared receive
0.03
14
AFT in
2.77
35
Connect to 5V via a
resistor
5.02
15
AGC in
1.7
36
Connect to 5V via a
resistor
5.01
16
n.c.
1.7
37
mute
0.11
17
Reset
4.99
38
AV select
0.02
18
Filter
3.13
39
Connect to 5V via a
resistor
5.02
19
CVBS in
3.25
40
Connect to 5V via a resist
5.01
20
V syn input
4.8
41
C resistor
5.01
21
H syn input
4.12
42
Connect to 5V via a
resistor
5.02
Circuit Explanation
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