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6. IC DESCRIPTION
(A BOARD)
N o .
Pin Name
1
SW
CONT
2
3
EXT IN B
4
EXT IN G
5
EXT IN R
6
7
VEE
8
N.C.
9
ACC FILTER
10
VIDEO IN
11
COLOR
12
F ADJ
13
AGC OUT
0
14
AGC FILTER
15
TRAP OUT
16
CLAMP
APL
17
H FILTER OUT
18
SYNC SEP
19
20
SYNC OUT
21
H. PULSE IN
22
TIME CONST
23
PICTURE
24
KILLER FILTER I
TINT
25
26
v c o
27
APC F
28
COM AMP
29
GND
30
COM OUT
31
VEE
32
R OUT
33
vcc2
G OUT
34
This pin switches between the signal from the tuner block (INT), video, and signal
I
from EXT R.G.B input pin (EXT). L : INT,
The contrast of the primary color output can be adjusted by the DC voltage input
I
to this pin.
I
No signal.
I
VHF tuning display bay signal input.
I
UHF tuning display bay signal input.
Positive polarity power supply connection.
Negative polarity power supply connection.
Not used. -
I
The ACC detection filter is connected.
The video signal is input.
I
Color is adjusted by the DC voltage input at this pin.
I
The
frequency characteristics of the filter can be adjusted by the resistance value
I
which is connected between this pin and GND.
Not used.
I
The AGC detection filter of the video block is connected.
0
The 3.58 MHz trap is connected.
I
The capacitance which clamps the pedestal of the Y- signal is connected.
I
The filter which detects the APL (Average Picture Level) of the Y-signal is connected.
The video signal which separates the sync signal is output.
I
Sync signal separation circuit input. The video signal is input.
This pin outputs the sync signal which is separated at the sync circuit. The output
type is the open collector type. Therefore, it is possible to connect this pin to the
0
controller powered by another supply. The output signal is H when it is sync, and
L when it is not sync.
The L pulse (* OV) is input when the sync signal is locked, and H pulse (* 3V) is
input when. the sync signal is not locked. The sync signal which is input, and the sync
I
signal which is separated at the sync separation circuit are OR and input to the pulse
generator circuit.
I
The gate pulse width is set with the CR time constant.
The frequency characteristics of the video block can be adjusted by the DC voltage
I
which is input to this pin.
The killer detection filter is connected.
I
The color phase can be adjusted by the DC voltage which is input at this pin.
The crystal oscillator is connected.
I
The APC detection filter is connected.
The COMMON output amplitude can be adjusted by the DC voltage which is input
I
at this pin.
GND
This pin outputs the pulse which drives the common electrode of the LCD.
0
Negative polarity power supply pin.
0
The inverted primary color signal is output according to the inversion signal.
Positive polarity power supply connection
0
The inverted primary color signal is output according to the inversion signal.
Description
H : open or EXT.
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