Sony RMT-V244, Service Manual

Page: 57 / 138

5-4
5-6. SERVO/SYSTEM CONTROL MICROPROCESSOR PIN FUNCTION (MA-325 BOARD IC161)
Pin No. Pin Name I/O Function
1 RF SWP O RF switching pulse output
2 AF REC P O “L” output when hi-fi audio REC pause
3 N.C – Not used
4 QVD O Quasi VD pulse output
5 N.C – Not used
6 N.C – Not used
7 REC CTL O REC CTL signal output
8 CTL RESET I CTL reset (for check)
9 CAM O CAM motor control
10 N.C – Not used
11 N.C – Not used
12 N.C – Not used
13 NT JUDGE – Not used
14 MESECAM DET – Not used
15 CIN (REC PRF) I Erasing protection tab. Cassette in detection.
16 N.C – Not used
17 N.C – Not used
18 N.C – Not used
19 MODE 4 I Mechanism section CAM encoder input (data4)
20 MODE 3 I Mechanism section CAM encoder input (data3)
21 MODE 2 I Mechanism section CAM encoder input (data2)
22 MODE 1 I Mechanism section CAM encoder input (data1)
23 N.C – Not used
24 N.C – Not used
25 N.C – Not used
26 TV/VTR O RF-output control
27 N.C – Not used
28 SDA 0 I/O Video Audio (Normal & Hifi) block communication signal (IIC DATA)
29 N.C – Not used
30 SCL 0 O Video Audio (Normal & Hifi) block communication signal (IIC CLOCK)
31 A MUTE O “A” Audio mute signal output
32 T/S LED O Top/End LED ON/OFF control
33 N.C – Not used
34 N.C – Not used
35 CAP STOP O Capstain motor stop control
36 FULL ERASE O Full erase head control
37 N.C – Not used
38 N.C – Not used
39 MP I Fixed to L
40 ASURA RESET I System reset input
41 V ss – Ground
42 XTAL – System clock 16MHz
43 EXTAL – System clock 16MHz
44 ASURA CS I S/S microcomputer chip signal
45 S IN I Serial communication signal (Data input)
46 S OUT O Serial communication signal (Data output)
47 S CLK O Serial communication signal (Serial clock)
48 N.C – Not used
49 N.C – Not used
50 N.C – Not used
Pin No. Pin Name I/O Function
51 N.C – Not used
52 AVSS – UNSW Ground
53 AVREF – A/D port reference input UNSW 5V
54 AVDD – UNSW 5V
55 NT PB SW I Not used (Pull up 5V)
56 AV ADJ I HiFi/RF switching adjustment mode
57 N.C – Not used
58 N.C – Not used
59 AF ENV I HiFi audio playback signal envelope
60 RF ENV I Video playback signal envelope
61 T SENS I Take up end sensor input
62 S SENS I Supply end sensor input
63 SREEL FG I S side reel FG input
64 TREEL FG I T side reei FG input
65 N.C – Not used
66 V SYNC I Composite sync input
67 PB CTL I Playback CTL input
68 DRM PG I Drum PG input
69 DRM FG I Drum FG input
70 CAP FG I Capstan FG input
71 N.C – Not used
72 CAP RVS O Capstan reverse control H when Reverse
73 CAP DA O Capstan error D/A output
74 DRM DA O Drum error D/A output
75 N.C – Not used
76 N.C – Not used
77 REC CONT I Record count input
78 N.C – Not used
79 N.C – Not used
80 SO1 O Signal for serial communication (data output)
81 SCK1 O Signal for serial communication (clock)
82 N.C – Not used
83 N.C – Not used
84 CAP TRQ PWM O Capstan TRQ PWM output
85 N.C – Not used
86 N.C – Not used
87 N.C – Not used
88 VSS – Ground
89 VDD – 5V
90 N.C – Not used
91 N.C – Not used
92 CTLHYS HIGHT O CTL amp. Step control (Hi)
93 IN SEL1 O LINE-INPUT selection control signal-1
94 N.C – Not used
95 N.C – Not used
96 AF REC O “H” output when Hifi audio REC
97 N.C – Not used
98 N.C – Not used
99 STEP PLS O Step pulse “H” when Capstan step driving
100 AF SWP O AF switching pulse output