Read Sharp LC-37AD1E (serv.man10) Service Manual online
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54-1
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LC-37AD1E
Ë
VHITA1318AF1EY (ASSY:IC604)
Synchronous processing for TV component signals, frequency measurement
»
Block Diagram
Pin No
.
P
in Name
I/O
Pin Function
»
Pin Function
1
H
D2-IN
I
Input the horizontal synchronizing signal.
It's polarity corresponds to both positive and negative.
Input from this pin does not be synchronized internally.
2
VD2-IN
I
Input the vertical synchronizing signal.
It's polarity corresponds to both positive and negative.
Input from this pin does not be synchronized internally.
3
HD1-IN
I
Input the horizontal synchronizing signal.
It's polarity corresponds to both positive and negative.
Input from this pin does not be synchronized internally.
4
VD1-IN
I
Input the vertical synchronizing signal.
It's polarity corresponds to both positive and negative.
Input from this pin does not be synchronized internally.
5
A
NALOG GND
—
The GND pin for analog circuit block.
6N
.C
—
It is a blank terminal. Please connect with GND.
7
AFC FILTER
—
Connect the filter for horizontal AFC. The frequency of the horizontal output is
varied by the volyage at this pin.
8N
.C
—
It is a blank terminal. Please connect with GND.
9
HVCO
—
Connect the ceramic oscillator for horizontal oscillator.
10
N.C
—
It is a blank terminal. Please connect with GND.
11
VCC
—
The VCC pin.(9.0V)
12
DAC2(H/C.
O
DAC2 output pin. When TEST mode, HD or composite sync signal to frequency
SYNC output)
counter circuit is output.
13
VD3-IN
I
Input the vertical synchronizing signal.
It's polarity corresponds to both positive and negative.
14
HD3-IN
I
Input the horizontal synchronizing signal.
It's polarity corresponds to both positive and negative.
15
CP-OUT
O
C
lamp pulse output pin. CP according to the incoming signal by which
synchronous reproduction is carried out is outputted.
16
HD1-OUT
O
HD output pin. This pin is open-collector system.
HD1/HD2 input signal is outputted from this terminal, without carrying out
synchronous processing.
It's polarity is switched by BUS write function.
17
N.C
—
It is a blank terminal. Please connect with GND.
18
DIGITAL GND
—
The GND pin for digital circuit block.
19
HD2-OUT
O
HD output pin. This pin is open-collector system.
HD1/HD2 input signal is outputted from this terminal, without carrying out
synchronous processing.
It's polarity is switched by BUS write function.
20
N.C
—
It is a blank terminal. Please connect with GND.
21
SDA
I/O
The SDA pin for I2C BUS.
22
SCL
I
The SCL pin for I2C BUS.
23
ADDRESS SW
I
S
lave address switch.
24
SYNC2-IN
I
It is the input of a synchronous separation circuit.
Y signal is inputted through a clamp capacitor.
25
DAC1(V. SYNC
O
DAC1 output pin. When TEST mode, VD or vertical sync signal to frequency
output)
counter circuit is output.
26
SYNC1-IN
I
It is the input of a synchronous separation circuit.
Y signal is inputted through a clamp capacitor.
27
N.C
—
It is a blank terminal. Please connect with GND.
28
VD1-OUT
O
VD output pin. This pin is open-collector system.
VD1/VD2 does not be synchronizing and they are output from this pin.
It's polarity is switched by BUS write function.
29
VD2-OUT
O
VD output pin. This pin is open-collector system.
VD1/VD2 does not be synchronizing and they are output from this pin.
It's polarity is switched by BUS write function.
30
DAC3
O
DAC2 output terminal. This pin is open-collector system. The pulse signal for a
shipment test is outputted at the time of TEST mode.
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