Read Sharp LC-M3700 (serv.man9) Service Manual online
37
LC-M3700
LC-M3710
LC-M3710
37-1
37-2
»
Pin Function
Pin No
.
Pin Name
I/O
Pin Function
1
IN3_1
I
IN3 system signal input terminals.
2
IN3_2
I
Please input through a capacitor.
3
IN3_3
I
Bias of the terminal voltage is carried out to 2.9V.
An input Y level should give me 0.7Vp-p and a composit input level as 0.7Vp-p
with a color bar 100%.
In Sync on Y and Sync on Green, please input a Sync level by 0.3 Vp-p.
IN3_1 : Cr/Cb/R signal input
IN3_2 : Cb/Pb/B signal input
IN3_3 : Y/YHD/G signal input
4
IN3_H
I
IN3_H : They are an self-support H synchronization or the input terminal of CS.
5
IN3_V
I
IN3_V : It is the input terminal of an self-support V synchronized signal.
Please input through the capacitor for a clamp. A bottom level is clamped by 1V.
Corresponds to positive/negative two-poles nature.
Please input an input on the level shown below.
0.4Vp-p < IN3_H < 4Vp-p
0.4Vp-p < IN3_V <4Vp-p
6
GND3
—
GND of a synchronized signal system.
7
IN4_1
I
IN4 system signal input terminals.
8
IN4_2
I
Please input through a capacitor.
9
IN4_3
I
Bias of the terminal voltage is carried out to 2.9V.
An input Y level should give me 0.7Vp-p and a composit input level as 0.7Vp-p
with a color bar 100%.
In Sync on Y and Sync on Green, please input a Sync level by 0.3 Vp-p.
IN4_1 : Cr/Cb/R signal input
IN4_2 : Cb/Pb/B signal input
IN4_3 : Y/YHD/G signal input
10
IN4_H
I
IN4_H : They are an self-support H synchronization or the input terminal of CS.
11
IN4_V
I
IN4_V : It is the input terminal of an self-support V synchronized signal.
Please input through the capacitor for a clamp. A bottom level is clamped by 1V.
Corresponds to positive/negative two-poles nature.
Please input an input on the level shown below.
0.4Vp-p < IN4_H < 4Vp-p
0.4Vp-p < IN4_V < 4Vp-p
12
VCC3
—
Power supply terminal of a synchronized signal system.
13
H_PH
Capacitor connection terminal for carrying out the peak hold of the Hsync.
14
V_PH
Capacitor connection terminal for carrying out the peak hold of the Vsync.
15
YG_OUT
O
Composite Video signal output terminal for synchronous separation.
About 6dB of signals chosen by I2C bus "HYSW" is amplified, and they are
outputted.
16
YG_IN
I
Composite Video signal input terminal for synchronous separation.
Usually, the signal outputted by 15 pins is inputted through a clamp capacitor.
Sync Tip is clamped by 2.3V. Please input a Sync level by 0.5 - 0.6 Vp-p.
17
CLP_SW
I
Input terminal of the pulse which switches clamp circuit operation of Y signal system.
18
IREF
Reference current setting terminal in IC (synchronized signal processing system).
Please connect resistance 10kohm of less than 1% of errors to opposite GND
(metal leather film resistance etc.). Terminal voltage is about 1V.
19
NC
—
No connect
20
EXTCLK/XTAL
Reference clock change terminal for synchronous counters.
When using Inside VCO, it is set as I2C bus "CLK_SEL=0" and a 4MHz X'tal
oscillation element or a ceramic oscillation element is connected. When you
input the 4MHz clock of external, please set it as I2C bus "CLK_SEL=1."
21
NC
—
No connect
22
SELH_OUT
O
HV output terminal of selectors IN1-IN4.
VOH < 3.5V
23
SELV_OUT
O
VOL < 0.5V
24
GND2
—
GND terminal of a picture signal system.
25
SELCR_OUT
O
Output terminal of selectors IN1-IN4. The signal by which YCbCr conversion
was carried out is outputted.
An output level is outputted by 6dB of an input level, when it is set as I2C bus
"GAIN_SEL=0."
26
SELCB_OUT
O
27
SELY_OUT
O
28
VCC2
—
Power supply terminal of a picture signal system.
29
CLP_CR
It is a constant terminal at the time of a diode clamp.
The minimum potential of a signal is clamped to 1.4V.
30
SCL
I
SCL (Serial Clock) input terminal of I2C bus reference.
31
SDA
I
SDA (Serial Data) input terminal of I2C bus reference.
32
ADDRESS
slave address setting terminal of I2C bus.
8Eh : More than 4V
8Ch : Open
84h : Less than 1.5V
33
IN1_1
I
IN1 system signal input terminals.
34
IN1_2
I
Please input through a capacitor.
35
IN1_3
I
Bias of the terminal voltage is carried out to 2.9V.
An input Y level should give me 0.7Vp-p and a composit input level as 0.7Vp-p
with a color bar 100%.
In Sync on Y and Sync on Green, please input a Sync level by 0.3 Vp-p.
IN1_1 : Cr/Cb/R signal input
IN1_2 : Cb/Pb/B signal input
IN1_3 : Y/YHD/G signal input
36
IN1_H/L1
I
IN1_H : They are an self-support H synchronization or the input terminal of CS.
37
IN1_V/L2
I
IN1_V : It is the input terminal of an self-support V synchronized signal.
Please input through the capacitor for a clamp. A bottom level is clamped by 1V.
Corresponds to positive/negative two-poles nature.
Please input an input on the level shown below.
0.4Vp-p < IN1_H < 4Vp-p
0.4Vp-p < IN1_V < 4Vp-p
Moreover, when it is set as I2 C bus "SELSTB_1=1", it becomes the input
terminal of the control lines 1 and 2 of D3 terminal. DC level of an input is
returned to status register "DECL1_1" and "DECL 2_1" by Three values.
38
IN1_L3
I
Input terminal of the control line 3 of D3 terminal.
When it is set as I2C bus "SELSTB_1=1", Return DC level of an input to status
register "DECL3_1" with three values.
39
IN1_SW
I
Input terminal of the control line 3 of D3 terminal.
When it is set as I2C bus "SELSTB_1=1", Return DC level of an input to status
register "DECL3_1" with two values.
40
VCC1
—
Power supply terminal of an input selector.
41
IN2_1
I
IN2 system signal input terminals.
42
IN2_2
I
Please input through a capacitor.
43
IN2_3
I
Bias of the terminal voltage is carried out to 2.9V.
An input Y level should give me 0.7Vp-p and a composit input level as 0.7Vp-p
with a color bar 100%.
In Sync on Y and Sync on Green, please input a Sync level by 0.3 Vp-p.
IN2_1 : Cr/Cb/R signal input
IN2_2 : Cb/Pb/B signal input
IN2_3 : Y/YHD/G signal input
44
IN2_H/L1
I
IN2_H : They are an self-support H synchronization or the input terminal of CS.
45
IN2_V/L2
I
IN2_V : It is the input terminal of an self-support V synchronized signal.
Please input through the capacitor for a clamp. A bottom level is clamped by 1V.
Corresponds to positive/negative two-poles nature.
Please input an input on the level shown below.
0.4Vp-p < IN2_H < 4Vp-p
0.4Vp-p < IN2_V < 4Vp-p
Moreover, when it is set as I2 C bus "SELSTB_2=1", it becomes the input
terminal of the control lines 1 and 2 of D3 terminal. DC level of an input is
returned to status register "DECL1_2" and "DECL 2_2" by Three values.
46
IN2_L3
I
Input terminal of the control line 3 of D3 terminal.
When it is set as I2C bus "SELSTB_2=1", Return DC level of an input to status
register "DECL3_2" with three values.
47
IN2_SW
I
Input terminal of the switch line of D3 terminal.
When it is set as I2C bus "SELSTB_2=1", Return DC level of an input to status
register "DECSW_2" with two values.
48
GND1
—
GND of an input selector.
Pin No
.
Pin Name
I/O
Pin Function
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