Sony RMT-V256A, Service Manual

Page: 55 / 84

5-3
5-6. SERVO/SYSTEM CONTROL MICROPROCESSOR PIN FUNCTIONS
(MA-339 BOARD IC162)
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
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Pin Name
DEST1
DEST2
TU AFT
FU KEY2
FU KEY1
S SENS
T SENS
RF ENV
AF ENV
MOD CONT
KKP+
KKP–
O VD
REMOCON
COLOR ROT
HA SW P
ENV SW
RF SW P
AF SW P
END LED
AV CONT
AF REC P
FULL ERS
CAP RVS
I CONT
MODE 4
MODE 3
MODE 2
MODE 1
REC PRF
IIC CLK EEP
IIC DATA EEP
CAM
RESET
Xc IN (32kHz)
Xc OUT (32kHz)
Vcc
X IN (17.734475MHz)
X OUT (17.734475MHz)
Vss
NICAM CLK
NICAM DATA
CLK SEL
OSC IN
OSC OUT
NUB
OSD LPF
LP
OSD GND
OSD V IN
I/O
I
I
I/O
I
I
I
I
I/O
I
O
I
I
O
I
O
O
I
I/O
O
O
O
O
I/O
O
O
I
I
I
I
I
O
I/O
O
I
I
O
I
O
I/O
O
I
I/O
I/O
I/O
O
I
Function
Destination identification input 1
Destination identification input 2
AFT input to TUNER for station selection
Function key input (9 keys)
Function key input (9 keys)
Tape end sensor input
Tape top sensor input
Video RF envelop input
HiFi envelop input
RF modulator ON/OFF control
KKP 2-phase pulse B input
KKP 2-phase pulse A input
Pseudo VO output
Remote control SIRCS signal input
Head azimuth information
SP/EP head switching signal
Identification signal of SP/EP head output comparison & detection
Video RF switching pulse output
HiFi switching pulse output
End sensor LED output
EURO 21 pin AV CONT signal output
HiFi record control signal
Full erase control signal for A DUB
Inverted capstan signal
EURO 21 pin-1 CONT signal output
Cam encode data 4
Cam encode data 3
Cam encode data 2
Cam encode data 1
Safety tab detection input
IIC clock (EEPROM control)
IIC data (EEPROM control)
Cam motor control signal
Reset input
Sub clock input
Sub clock output
Power supply input terminal (high speed mode: 4.0 to 5.5 V, low speed mode: 2.6 to 5.5 V)
Main clock input
Main clock output
Ground terminal
Clock for NICAM control
Data for NICAM control
Selection of oscillation clock when reset is canceled. L: sub clock, H: main & sub clocks
Clock input for OSD character size
Clock output for OSD character size
Connected to Ground
External filter that doubles the fsc, is connected to this terminal
L at SP
Ground terminal of OSD/slicer
Video signal input for OSD overlay