Onkyo TA 6711 Service Manual

Page 7

MICROPROCESSOR TERMINAL DESCRIPTION

PORT NO. TERMINAL 1/0 DESCRIPTION
1 TAPE IN SW I TAPE IN DETECTION SWITCH INPUT TERMINAL. ACTIVE "L"
2 REC INH SW I RECORDING PREVENTION INPUT TERMINAL. ACTIVE "H
3 HIGH SW I HIGH POSITION DETECTION SWITCH. ACTIVE "H
4 METAL SW 1 METAL POSITION DETECTION SWITCH. ACTIVE "H"
5 ASSIST SW1 I HEAD POSITON DEI'ECITON SWITCH INPUT TERMINAL.
6 ASSIST SW2 I HEAD POSITON DETECTION SWITCH INPUT TERMINAL.
7 FT 1 TEST TERMINAL. ACTIVE "L"
8 CLOCK O CLOCK SERIAL PORT OUTPUT TERMINAL.
9 SLAVE DATE I DATA INPUT TERMINAL FROM COUNTER MICROPROCESSOR To MAIN MICROPROCESSOR.
10 MASTER DATE 0 DATA OUTPUT TERMINAL FROM MAIN MICROPROCESSOR TO COUNTER MICROPROCESSOR.
1 1 SLAVE RESET 0 COUNTER MICROPROCESSOR RESET SIGNAL OUTPUT TERMINAL ACTIVE "L"
12 TEST TEST TERMINAL. CONNECTED TO GND.
13 RESET MICROPROCESSOR RESET SIGNAL INPUT TERMINAL.
14 4MHz RESONATOR FOR SYSTEM CLOCK OSCILLATE TERMINAL.
I 5 RESONATOR FOR SYSTEM CLOCK OSCILLATE TERMINAL.
16 GND POWER TERMINAL.
17 EXTERNAL CLOCK TERMINAL. CONNECTED TO GND.
18 EXTERNAL CLOCK TERMINAL. NC
19 GND POWER TERMINAL FOR A/D CONVERTER. CONNECTED TO GND.
20 Rah LEVEL I Rch LEVEL INPUT TERMINAL FOR SEARCH AND AUTO ACCU BIAS.
21 LCH LEVEL I Lch LEVEL INPUT TERMINAL FOR SEARCH.
22~26 BIAS(Lch) 0~4 0 Lab BIAS CONTROL SIGNAL OUTPUT TERMINAL
27 ~ 31 BIAS(Rch) 0~4 0 Rch BIAS CONTROL SIGNAL OUTPUT TERMINAL.
32 +5V POWER TERMINAL FOR A/D CONVERTER. CONNECTED TO +5 V.
33 +5V POWER TERMINAL.
34 LINE MUTE O OUTPUT TERMINAL FOR LINE MUTE CONTROL. ACTOVE "H"
35 REC MUTE O OUTPUT TERMINAL FOR REC MUTE CONTROL. ACTOVE "H"
36 BIAS CONT O OUTPUT TERMINAL FOR BIAS CONTROL. ACTOVE "H"
37 TAPE/SOURCE O TAP/SOURCE CAHNGE OVER OUTPUT TERMINAL. I;TAPEIH=SOURCE
38 P-OFF I POWER CUT DETECTION INPUT TERMINAL.
39 AUTO ACCU ON/OFF O
40 CAL 400/ 10K 0 OSC FREQUENCY CHANGE OVER OUTPUT TERMINAL FOR AUTO ACCU. H=4oonA;10kHz
41 OSC ON/OFF 0 osc OSCILLATE CONTROL OUTPUT TERMINAL FOR AUTO ACCU. ACTIVE "H"
42 MPX ON/OFF O MPX FILTER CONTROL OUTPUT TERMINAL. ACTIVE "H"
43 DOLBY ON/OFF 0 DOLEY IC CONTROL OUTPUT TERMINAL H=OFF/L=ON
44 DOLBY BIG 0 DOLEY IC CONTROL OUTPUT TERMINAL. Ila/L43
45 R.EN SW I ROTARY ENCODER SWITCH.
46 R.EN UP I ROTARY ENCODER PULSE UP.
47 R.EN DOWN I ROTARY ENCODER PULSE DOWN.
48 ~52 LEVEL(RcII) 0~4 O REC LEVEL CONTROL OUTPUT TERMINAL.
53 R.SENSOR I ROTATION PULSE INPUT TERMINAL.
54 ASSIST DOWN 0 ASSIST MOTOR CONTROL OUTPUT TERMINAL. ACTIVE H"
55 ASSIST UP 0 ASSIST MOTOR CONTROL OUTPUT TERMINAL. ACTIVE H"
56 O-PLAY 0 REEL MOTOR TORQUE CHANGE OVER OUTPUT TERMINAL. Low TORQUE "H
57 REW O REEL MOTOR CONTROL OUTPUT TERMINAL. ACITVE "H
58 FF 0 REEL MOTOR CONTROL OUTPUT TERMINAL. ACTIVE "H"
59 CAPSTAN O CAPSTAN MOTOR CONTROL OUTPUT TERMINAL. ACITVE "H
60 NORMAL o PLAY REC EQUALIZER CONTROL OUTPUT TERMINAL. ACTIVE 'H"
61 HIGH 0 PLAY REC EQUALIZER CONTROL OUTPUT TERMINAL. ACITVE "H"
62 METAL 0 PLAY REC EQUALIZER CONTROL OUTPUT TERMINAL. ACITVE "H"
63 RI OUT 0 RI CODE OUTPUT TERMINAL. ACTIVE "H
64 RI IN I RI CODE INPUT TERMINAL