Sony SLV-7700KME, Service Manual

Page: 87 / 135

6-7
Pin No.
Pin Name
I/O
Function
79
CAP R
V
S
O
Capstan re
ver
se control H when re
v
er
se
.
80
SO1
I/O
Signal for serial communication.
81
SCK1
I/O
Signal for serial communication.
82
C IN/REC PRF
I
Erasing protection bab, cassette in detection.
83
NC
–
Not used.
84
PWM
O
PWM output (14bit) f
or
APC2.
85
NC
I
Not used.
86
NC
–
Not used.
87
NC
–
Not used.
88
VSS
–
GND.
89
VDD
–
5
V
.
90
NC
–
Not used.
91
VCD/VHS
O
"L" output w
hen
VHS mode
.
92
SP
O
T
ape speed select.
93
3.58NTSC
O
V
ideo selection signal. ("H" :
3.58 X’
tal)
94
CTL REC
O
"H" : CTL write.
95
CTL STEP
O
CTL amp, step operation control.
96
CTL INDEX
O
CTL index signal input.
97
NC
–
Not used.
98
N
A
PB
O
Audio output control signal. "H" : Normal audio playback.
99
STEP PLS
O
Ste
p pulse "H" w
hen ca
pstan ste
p dr
iving.
100
AF SWP
O
AF switching pulse output.
6-9.
DISPLA
Y/FUNCTION CONTROL
MICROPROCESSOR PORT
FUNCTION DESCRIPTION (HI-66 BOARD IC201 CXP82940-021Q)
Pin No.
Pin Name
I/O
Function
1
V
SYNC
I
Composite sync input.
2
QINT
I
QINT signal of CD block communication. (MECH
n
Master)
3
SYNC DET
I
Sync detect signal from OSD IC.
4
RMC
I
Remote contr
ol signal r
ecei
v
e terminal.
5
K
RED
Y
I
KARA
OKE DSP r
eady signal.
6, 7
N
C
–
Not used.
8
SRDT1
I/O
Serial-parallel signal for
A
VSW
.
9
INSW
I
CD tray chucking data.
10
ASURA CLK
O
ASURA clock.
11
ASURA SI
I
ASURA serial communication input.
12
ASURA SO
O
ASURA serial communication output.
13
SR CLK
I/O
Serial communication clock.
14
CD RESET
O
CD and KARA
OKE IC reset.
15
SO
O
Serial comm
unica
tion output. (to KARA
OKE IC and OSD IC)
16
KEY 4
I
K
ey 4 g
roup input.
17
KEY 3
I
K
ey 3 g
roup input.
18
ECHO
VL
I
E
cho v
olume input.
19
LEVEL L
I
Le
v
el meter L input.
20
LEVEL R
I
Le
v
el meter R input.
21
MIC CTRL
I
MIC control input.
22
KEY 2
I
K
ey 2 g
roup input.
23
KEY 1
I
K
ey 1 g
roup input.
24
A
VDD
–
D
6V
.
25
A
V
REF
–
A/D con
v
er
ter r
ef
er
ence v
olta
g
e input ter
minal.
26
LOD OUT
O
CD tray open motor switch.
27
P MUTE
O
P
o
w
er ON/OFF mute.
28
K LA
T
O
KARA
OKE DSP latch.
29
LODIN
O
CD tray close motor switch.
30
A
VSS
–
GND.
31
EXT
AL
–
System clock. (16 MHz)
32
XT
AL
–
33
VSS
–
GND.
34
RST
I
Reset terminal.
35
CMD0
I/O
Command of CD block communication. (Master
˜
MECHA)
36
CMD1
I/O
Command of CD block communication. (Master
˜
MECHA)
37
CMD2
I/O
Command of CD block communication. (Master
˜
MECHA)
38
CMD3
I/O
Command of CD block communication. (Master
˜
MECHA)
39
SA
CK
I
A
CK of CD b
lock comm
unica
tion. (Master
˜
MECHA)
40
MREQ
O
REQ of CD block communication. (Master
˜
MECHA)