Sony RMT-V259M, Service Manual

Page: 83 / 117

5-3
5-6. SERVO/SYSTEM CONTROL MICROPROCESSOR PIN FUNCTION
(MA-388 Board IC160 CXP8846-022Q)
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
RF SWP
AF REC P
NC
QVD
AUTO PRESET
FE ON
SW1
NC
CAM LOAD
CAM UNLOAD
TA MUTE
SECAM DET
NC
SECAM MIX
CIN
(REC PROOF)
AV CONT
SECAM ON
MODE4
MODE3
MODE2
MODE1
ENV SW
S IN O
S OUT O
SCLK
ASURA CS
SRVO
CAP TRQ PWM
C+ DET
CAP RVS
A MUTE
T/E LED
CAP STOP
FULL ERASE
NC
SDA O
NC
SCL O
MP
ASURA RESET
VSS
XTAL
EXTAL
NC
DRM PG
DRM FG
CAP FG
DNR RST
FRONT SEL
ICONT
I/O
O
O
—
O
O
O
O
—
O
O
O
I
—
O
I
O
O
I
I
I
I
I
I
O
I
I
O
O
I
O
O
O
O
O
—
I/O
—
I/O
I
I
—
O
I
—
I
I
I
O
O
O
Function
RF Switching pulse output
Hi-Fi record pulse output “H” when
Hi-Fi Audio REC
Not used
Quasi Video pulse output
“H” during Autopreset
Flying Erase ON/OFF
BG/L control signal
Not used
CAM motor control
CAM motor control
Tuner Audio Mute output
“H” when SECAM is detected
Not used
SECAM MIX control
Erasing Protection tab, Cassette in
Detection
TV/VTR control
SECAM control output signal
Mechanism section CAM encoder
input (data4)
Mechanism section CAM encoder
input (data3)
Mechanism section CAM encoder
input (data2)
Mechanism section CAM encoder
input (data1)
Envelope switch input
Serial communication signal
Serial communication signal
Serial communication signal
Servo/system control microcomputer
chip select signal
Digital CTL Output
PWM output for capstan torque control
CANAL+ Detection
Capstan reverse control. “H” when
reverse
AUDIO mute output. “H” when
Audio Mute
Tape top/end sensors driver
Capstan stop signal output
Full erase control
Not used
I2C data
Not used
I2C clock
Fixed to L.
System Reset input
GND
System Clock 16MHz
System Clock 16MHz
Not used
Drum PG input
Drum FG input
Capstan FG input
DNR reset signal
FRONT (Line2/Line3) select signal
I control select signal
Pin No.
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
Pin Name
SW2
A VSS
A VREF
A VDD
NTPB SW
AV ADJ
FOLLOW TV
NC
AF ENV
RF ENV
T SENS
S SENS
NC
AMP VSS
CTL HEAD (–)
CTL HEAD (+)
HEAD (+)
HEAD (–)
CTL F AMP (+)
CTL F AMP (–)
CTL GND
CTL S AMP I
CTL F AMP O
AMP VDD
CTL OUT
SREEL FG
TREEL FG
CAP DA
DRM DA
NC
NC
V SYNC
NC
24V CONT
18V CONT
NC
NC
VSS
VDD
5V
NC
FAST SEARCH
HA SWP
POWER SAVE
CONT1
POWER SAVE
C+
MOD CONT
SP/LP
NC
STEP PLS
AF SWP
I/O
O
—
I
I
I
I
I
—
I
I
I
I
—
I
I/O
I/O
O
O
I
I
—
I
O
—
O
I
I
O
O
—
—
I
—
O
O
—
—
—
—
—
—
O
O
O
O
O
O
—
O
O
Function
BG/L’control signal
GND
Positive supply Voltage
Positive supply Voltage
NTSC switch PB input
Hi-Fi/RF switching adjustment mode
Synchro-TP detection signal
not used
Hi-Fi audio playback signal envelope
Video playback signal envelope
Take up end sensor input
Supply end sensor input
not used
Unswitch ground
Playback CTL input (Not amplified)/
REC CTL signal output on
Playback CTL input (Not amplified)/
REC CTL signal output on
Playback CTL output (Not amplified)
Playback CTL output (Not amplified)
Playback CTL input for CTL first
amplifier on CTL (X)
Playback CTL input for CTL first
amplifier on CTL (Y)
Bias voltage level on CTL amplifier
(2.5V)
Playback CTL input for CTL second
amplifier
Playback CTL output from CTL first
amplifier
Unswitched 5V for CTL amplifier
Analog CTL signal (amplifier
playback CTL signal) Output
Supply Reel FG input
Take up Reel FG input
Capstan error D/A output
Drum PG output
not used
not used
Composite sync. Signal input
Not used
Capstan 24V control signal
Capstan 18V control signal
not used
not used
GND
Positive supply Voltage
Positive supply Voltage
Not used
Switching signal for capacitor on
CTL (X)
Head amplifier switching pulse
–30V Power supply control
C+ IC Power supply control
Tuner modulation output control
signal
SP/LP mode for video IC
Not used
Step pulse “H” when Capstan step
driving
AF switching pulse output