Sony MCE-K700, Service Manual

Page: 51 / 66

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• IC801 CHARACTER GENERATOR (LC74760)/VIDEO board
Pin Name
V
SS
XTAL IN1
XTAL OUT1
HSYNC OUT
XTAL IN2
XTAL OUT3
VSYNC OUT
CS
SIN
SCLK
SECAM
525/625
NTSC/PAL
3.58/4.43
RST
CV OUT
V
DD2
CV IN
CV CR
SYNC IN
SEPC
V
SS
PD OUT
AMP IN
AMP OUT
FC
VCO IN
VCO OUT
SYNC DET
V
DD
1
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
I/O
–
I
O
O
I
O
O
I
I
I
I
I
I
I
I
O
–
I
I
I
O
–
O
I
O
I
I
O
O
–
Function
Ground connect pin
Pin for connecting to the capacitor or crystal of oscillator for internal sync signal oscilla-
tion applications (Crystal oscilloation for NTSC: 4fsc=14.318MHz)
Pin for connecting to the capacitor or crystal of oscillator for internal sync signal oscilla-
tion applications (Crystal oscilloation for NTSC: 4fsc=14.318MHz). Not used (Open).
Pin for outputting horizontal synchronizing signal (AFC). Polarity can be selected (metal
option). Not used (Open).
Pin for connecting to capacitor or crystal of crystal oscillator for internal sync signal oscil-
lation applications (Crystal oscillation for PAL: 4fsc=17.734MHz)
Pin for connecting to capacitor or crystal of crystal oscillator for internal sync signal oscil-
lation applications (Crystal oscillation for PAL: 4fsc=17.734MHz). Not used (Open)
Pin for outputting vertical synchronizing signal. Polarity can be selected. (metal option)
Not used (Open)
Enable input pin for serial data input. The serial data input becomes enable at “L”. Incorpo-
rates a pull-up resistor. (Hysteresis input)
Serial data input. Incorporates a pull-up resistor. (Hysteresis input)
Clock input pin for serial data input. Incorporates a pull-up resistor (Hysteresis input)
SECAM mode select switch. “L”=Modes other than SECAM. (“H”=SECAM mode) (Con-
nected to ground)
Pin which switches scanning lines to 525 or 625. (“L”=525 lines. “H”=625 lines)
Pin which switches the color system to NTSC or PAL. (“L”=NTSC. “H”=PAL)
Pin which switches the FSC to 3.58 MHz or 4.43 MHz. (“L”=3.58. “H”=4.43) (Connected
to ground)
System reset input (active=L”). Incorporates a pull-up resistor. (Hysteresis input)
Pin for composite video signal output.
Pin for power supply for generating composite video signal level.
Pin for composite video signal input
SECAM chroma signal input pin. Not used (Open)
Pin for video signal input terminal for internal sync signal separator
Pin for output of on-chip sync separator circuit bias. Not used (Open)
Ground connect pin
AFC control voltage output pin
Filter connect pin
AFC control voltage input pin
Pin for connecting LC oscillator coil and capacitor for VCO
This pin outputs the exclusive NOR of the horizontal synchronization signal (AFC) and the
sync separation signal (SYNC). Not used (Open)
Power supply (+5V : Digital power supply)