Sony TC-K670 - Page 6

TC-K570/K670/K677ES
SECTION 3
PIN DESCRIPTION
©1C701 M50941-483SP(MICRO COMPUTER)
The M50941-483SP function are-described below.
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1 | Vrer Internal A/D port reference voltage input.
2 KEY 7 Key input port. OV = OPEN/CLOSE, 1V = STOP, 2V = REW, 3V = FF, 4V = REC.
3 KEY 6 I key input port. OV = PLAY, IV = PAUSE, 2V = REC MUTE. .
4 KEY 5 I Key input port. OV = RESET, 1V = MEMORY, 2V = DISPLAY MODE, 3V = MONITOR.
5 METER-L | Signal input for level meter-L.
6 METER-R I Signal input for level meter-R.
7 TIMER I Timer REC/PLAY switch input. OV = TIMER REC, 1V = TIMER PLAY, 2V = OFF.
8 T. PULSE I Take-up reel base sensor input.
9 S. PULSE I Supply reel base sensor input.
10 AMS. SIG I AMS signal input. No song detected = Low. Song detected = High.
1] BIAS 0 Bias oscillation on and off control.
12 MO3V 0 Motor speed control. STOP/PLAY = Low, FF/REW = High.
18 M04, 5V 0 Motor speed control. STOP/PLAY = High, FF/REW = Low.
14 MO-FWD 0 Reel motor rotates.
15 MO-REV 0 Reel motor rotates in reverse.
16 MO-DOWN 0 Head base DOWN output of the mechanical block.
17 MO-UP 0 Head base UP output of the mechanical block.
18 HALF-SW I HALF switch input of the mechanical block.
19 REC-SW I REC switch input of the mechanical block.
20 DOOR-SW I DOOR switch input of the mechanical block.
21 CLOSE-SW I CLOSE switch input of the mechanical block.
22 OPEN-SW I OPEN switch input of the mechanical block.
23 POWER-OUT 0 “Low” for power off procedure after POWER switch is turned off.
24 POWER-IN I Power (AC) off detection.
25 | Remote control signal input.
26 oe GND
27 I System reset input.
28 I Clock input (4. 19MHz).
29 0 Clock output.
30 _ Not used.
31 zc Not used.
32 Ves = GND
33 Not used.
34° | PATS I
| | Rotary encoder input to detect the position of the head base of the mechanical block.
37 PATO I
38 ZV = Power supply for driving the fluorescent indicator tube.
39 FL~p 0
| | | Segment data output for the fluorescent indicator tube FL751.
54 FL-a 0
55 FL-G5 0
| | | Common data output for the fluorescent indicator tube FL751.
59 FL-G1 0
60 MONI TOR 0 Source monitor control. Low = TAPE, High = SOURCE.
61 REC-MUTE 0 REC MUTE control. Low = MUTE.
62 LINE-MUTE 0 LINE MUTE control. Low = MUTE.
63 AVec i Analog power supply(+5V).
64 Vec = Power supply(+5V).