(Ma-336 Board Ic201); Servo/System Control Microprocessor Pin Functions - Sony SLV-GA30 Service Manual

5-6. SERVO/SYSTEM CONTROL MICROPROCESSOR PIN FUNCTIONS

(MA-336 BOARD IC201)

Pin No. Pin Name
1 REC PRF
2 AVSS
3 KEY1
4 KEY2
5 KEY3
6 KEY4
7 DEST2
8 V SWP ADJ
9 A SWP ADJ
10 DEST
11 S SENS
12 T SENS
13 VIDEO RF
14 AUDIO RF
15 AVCC
16 RESET
17 REC P
18 NTSC
19 KILL IN
20 SHARPCONT1
21 AU MUTE
22 VCC
23 AF SWP
24 RF SWP
25 CAP VS
26 DRUM VS
27 QVD
28 NC
29 SHARPCONT2
30 NC
31 CTL (+)
32 CTL (–)
33 VSS (SERVO)
34 CTLI-1
35 CTLI-2
36 CTLI-3
37 CTLAMP
38 DRUM FG
39 DRUM PG
40 CAP FG
41 VCC (SERVO)
42 VCC (OSD)
43 CVIN
44 VREF
45 CVOUT
46 CHAR. BIAS
47 AFC LPF
48 AFC OSC
49 VSS(OSD)
50 DOSC IN
I/O
I Erasing protection tab. cassette in detection.
Analog circuit ground
I (A/D) Analog voltage (KEY) input 1.
I (A/D) Analog voltage (KEY) input 2.
I (A/D) Analog voltage (KEY) input 3.
I (A/D) Analog voltage (KEY) input 4.
I (A/D) Destination discrimination input 2
I (A/D) Video switching position adjustment
I (A/D) Audio switching position adjustment
I (A/D) Destination discrimination input 1
I (A/D) Supply side end sensor input
I (A/D) Take-up side end sensor input
I (A/D) Video RF envelope input
I (A/D) HiFi audio envelope input
Analog circuit power supply
I Reset signal input
O HiFi pre-amp, linear audio REC bias. REC PAUSE: L.
O Video IC NTSC: H, PAL: L
I Video IC
O SHARPNESS control H: Active
O Video IC Mute on: H, Mute off: L
Power supply
O AF switching pulse output
O RF switching pulse output
O Capstan error output
O Drum error output
O Quasi VD pulse output
Not connected
O SHARPNESS control H: Active
Not connected
I/O CTL signal I/O
I/O CTL signal I/O
Servo circuit ground
CTL amp control output
CTL amp control input
CTL amp control output
CTL amp output
I Drum FG input
I Drum PG input
I Capstan FG input
Servo circuit power supply
OSD circuit power supply
I Video signal input for character generator
O Video signal output from character generator
External character brightness level input
AFC LPF pin input
AFC oscillator pin input
OSD circuit ground
I DOSC IN
5-3
Function