(Ma-359 Board Ic160); Servo/System Control Microprocessor; Pin Functions (Ma-359 Board Ic160) - Sony SLV-SE85 Service Manual

5-6. SERVO/SYSTEM CONTROL MICROPROCESSOR PIN FUNCTIONS

(MA-359 BOARD IC160)

Pin No. Pin Name I/O
1 RF SWP O
2 AF REC P O
3 N.C O
4 QVD O
5 AUTO PRESET O
6 FE ON O
7 SW1 O
8 N.C
9 CAM 2 I
10 N.C
11 TA MUTE O
12 SECAM DET I
13 N.C I
14 SECAM MIX
15 CIN (REC PRF) I
16 AV CONT O
17 SECAM ON
18 MODE 4 I
19 MODE 3 I
20 MODE 2 I
21 MODE 1 I
22 ENV SW I
23 S IN 0 I
24 S OUT 0 O
25 S CLK I
26 ASURA CS I
27 SRVO O
28 CAP TRQ PWM O
29 C + DET
30 CAP RVS O
31 A MUTE O
32 T/E LED O
33 CAP STOP O
34 FULL ERS O
35 N.C
36 SDA 0 I/O
37 N.C
38 SCL 0 I/O
39 MP —
40 ASURA RESET I
41 V SS —
42 XTAL O
43 EXTAL I
44 N.C —
45 DRM PG I
46 DRM FG I
47 CAP FG I
48 DNR RST —
49 FRONT SEL —
50 I CONT —
Function
RF switching pulse output.
"H" when HiFi audio REC.
Not used.
Quasi VD pulse output.
"H" during auto preset.
Flying erase ON/OFF.
BG/L control signal
Not used.
Cam motor control.
Not used.
Tuner audio mute. H: Mute
Not used.
Not used.
Not used.
Erasing protection tab, cassette in
detection signal input.
Not used.
Cam encoder signal input.
Cam encoder signal input.
Cam encoder signal input.
Cam encoder signal input.
Video envelope mode detect signal
(SP or EP)
Serial communication signal.
Serial communication signal.
Serial communication signal.
Servo/system control microcomputer
chip select signal.
Not used.
PWM output for capstan torque
control.
Not used.
Capstan reverse control "L" when
reverse.
"H" when audio mute.
Tape top /end sensors driver.
Capstan stop signal output.
Full erase control.
Not used.
Serial communication data.
Not used.
Serial communication clock.
Ground.
System reset signal.
Ground.
System clock (16 MHz).
System clock (16 MHz).
Not used.
Drum PG input.
Drum FG input.
Capstan FG input.
NICOL control signal out.
Cable box control signal out.
Forced mono.
Pin No. Pin Name
51 SW2
52 AVSS
53 AVref
54 AVDD
55 NTPB SW
56 AV ADJ
57 FOLLW TV
58 N.C
59 AF ENV
60 RF ENV
61 T SENS
62 S SENS
63 N.C
64 AMP VSS
65 CTL HEAD (–)
66 CTL HEAD (+)
67 HEADL (+)
68 HEADL (–)
69 CTL F AMP (+)
70 CTL F AMP (–)
71 CTL GND
72 CTL S AMPI
73 CTL F AMPO
74 AMP VDD
75 CTL OUT
76 S REEL FG
77 T REEL FG
78 CAP DA
79 DRM DA
80 N.C
81 N.C
82 VSYNC
83 N.C
84
24 V_CONT
85
18 V_CONT
86 N.C
87 N.C
88 VSS
89 VDD
90 5V
91 N.C
92 FAST SEARCH
93 HA SWP
94 POWER SAVE CONT 1
95 POWER SAVE C+
96 MOD CONT
97 SP/LP
98 TV/VTR
99
STEP PLS
100 AF SWP
5-3
I/O Function
O Not used.
— Ground.
I D5V
I D5V
I Ground.
I Adjustment mode.
— Ground.
— Ground.
I HiFi audio playback signal envelope.
I Video playback signal envelope.
I Take-up end sensor.
I Supply end sensor.
I Not used.
— Ground.
I/O CTL signal I/O.
I/O CTL signal I/O.
O CTL signal.
O CTL signal.
I CTL first AMP input.
I CTL first AMP input.
O Ground.
I CTL second AMP input.
O CTL first AMP output.
I 5 V.
O Control signal output for check pin.
I Supply reel FG input.
I Take-up reel FG input.
O Capstan error D/A output.
O Drum error D/A output.
UNSW 5 V.
— Ground.
I Composite sync signal input.
Not used.
24 V control, when the high speed
O
mode.
18 V control, when the high speed
O
mode.
Not used.
Not used.
— Ground.
I D5V
I D5V
O Not used.
Switching signal for capacitor on
O
CTL(X).
O Head AMP SWP.
O Not used.
O Not used.
O Tuner modulation out control signal.
Tape speed mode control signal "L"
O
when SP mode.
O Not used.
Step pulse "H" when capstan step
O
driving.
O AF switching pulse output.