Yamaha RX-777, Руководство по обслуживанию

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RX-777
RX-777
Pin No. Port I/O Function
1 P75 O /R2MU ZONE 2 OUT MUTING [H: ON]
2 P74 O /MUTE MAIN IN MUTING [H: ON]
3 P73 I VER VERIFICATION VOLTAGE
4 P72 I REC REC OUT SELECTOR
5 P71 I KYAD1 KEY AD IN 1
6 P70 I KYAD2 KEY AD IN 2
7 P61 O POMUTE PRE OUT MUTING [H: ON]
8 P60 – – OPEN
9 P47 I REM REMOTE CONTROL IN
10 /RESET I /RESET RESET
11 P91 I ENL INPUT SELECTOR B IN
12 P90 I ENR INPUT SELECTOR A IN
13 Vss I Vss GND
14 Xin I Xin 4 MHz
15 Xout O Xout 4 MHz
16 Vcc I Vcc +5 V
17 P46 I PDon PURE DIRECT IN [L: ON]
18 P45 I CDon CD DIRECT IN [L: ON]
19 P44 I Bin SP B IN [L: ON]
20 P43 I Ain SP A IN [L: ON]
21 P42 I PWSW POWER SW IN
22 P41 – – OPEN
23 P40 I PD POWER DOWN DETECT
24 P87 O RY PS POWER RELAY OUT [H: ON]
25 P86 O RY B SP RELAY B OUT [H: ON]
26 P85 O RY A SP RELAY A OUT [H: ON]
27 P84 O RY HP HP RELAY OUT [H: ON]
28 Vee I Vee -25 V
29 P83 O DIG 13 FL DIGIT 13 [H: ON]
30 P82 O DIG 12 FL DIGIT 12 [H: ON]
31 P81 O DIG 11 FL DIGIT 11 [H: ON]
32 P80 O DIG 10 FL DIGIT 10 [H: ON]
33 P37 O DIG 9 FL DIGIT 9 [H: ON]
34 P36 O DIG 8 FL DIGIT 8 [H: ON]
35 P35 O DIG 7 FL DIGIT 7 [H: ON]
64
P2
0
/Buz
02
/FLD
0
63
P2
1
/FLD
1
62
P2
2
/FLD
2
61
P2
3
/FLD
3
60
P2
4
/FLD
4
59
P2
5
/FLD
5
58
P2
6
/FLD
6
57
P2
7
/FLD
7
56
P0
0
/FLD
8
55
P0
1
/FLD
9
54
P0
2
/FLD
10
53
P0
3
/FLD
11
52
P0
4
/FLD
12
51
P0
5
/FLD
13
50
P0
6
/FLD
14
49
P0
7
/FLD
15
48
P1
0
/FLD
16
47
P1
1
/FLD
17
46
P1
2
/FLD
18
45
P1
3
/FLD
19
44
P1
4
/FLD
20
43
P1
5
/FLD
21
42
P1
6
/FLD
22
41
P1
7
/FLD
23
40 P3
0
/FLD
24
39 P3
1
/FLD
25
38 P3
2
/FLD
26
37 P3
3
/FLD
27
36 P3
4
/FLD
28
35 P3
5
/FLD
29
34 P3
6
/FLD
30
33 P3
7
/FLD
31
32 P8
0
/FLD
32
31 P8
1
/FLD
33
30 P8
2
/FLD
34
29 P8
3
/FLD
35
28 V
EE
27 P8
4
/FLD
36
26 P8
5
/RTP
0
/FLD
37
25 P8
6
/RTP
1
/FLD
38
P5
7
/S
RDV2
/S
CLK22
P5
6
/S
CLK21
P5
5
/TxD
P5
4
/RxD
P5
3
/S
CLK12
P5
2
/S
CLK11
P5
1
/S
OUT1
P5
0
/S
IN1
AV
SS
V
REF
P6
5
/S
STB1
/AN
11
P6
4
/INT
4
/S
BUSY1
/AN
10
P6
3
/AN
0
P6
2
/S
RDY1
/AN
8
P7
7
/AN
7
P7
6
/AN
6
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
P7
5
/AN
5
P7
4
/AN
4
P7
3
/AN
3
P7
2
/AN
2
P7
1
/AN
1
P7
0
/AN
0
P6
1
/CNTR
0
/CNTR
2
P6
0
/CNTR
1
P4
7
/INT
2
RESET
P9
1
/X
COUT
P9
0
/X
CIN
V
SS
X
IN
X
OUT V
CC
P4
6
/T
SOUT
P4
5
/T
1OUT
P4
4
/PWM
1
P4
3
/B
UZ01
P4
2
/INT
3
P4
1
/INT
1
P4
0
/INT
0
P8
7
/PWM
0
/FLD
39
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
9
■
IC DATA
IC301 : M38B57M6-172FP
8 bit
µ
-COM (Main CPU)