Fostex FD-4 Service Manual page 56

MAIN, AUDIO IF (4/9)
V CO + 5
V CO + 5
PO W ER
V CO G N D
V CO G N D
10/16
D + 5
PO W ER
D + 5
D G N D
D G N D G N D
SCSI
/A TA _RST
/A TA _RST /A TA _RST
D D [ 0..17]
D D [ 0..17] D D [ 0..17]
D M A RQ
D M A RQ D M A RQ
/D IO W
/D IO W /D IO W
/D IO R
/D IO R /D IO R
IO RD Y _I
IO RD Y _I IO RD Y _I
/D M A CK
/D M A CK /D M A CK
/PD I A G
/PD I A G /PD I A G
IN TRQ
IN TRQ IN TRQ
/CS1FX
/CS1FX /CS1FX
/CS3FX
/CS3FX /CS3FX
A TA [ 0..4]
A TA [ 0..4] A TA [ 0..4]
/D M A _RD
/D M A _RD /D M A _RD
/D M A _W R
/D M A _W R /D M A _W R
/SCSI_CS
/SCSI_CS /SCSI_CS
D M A _SEL
D M A _SEL D M A _SEL
/SCSI_D RE Q
/SCSI_D RE Q /SCSI_D RE Q
SC_IN T7I
SC_IN T7I SC_IN T7I
SCSI_TM O U T SCSI_TM O U T
28M H Z
28M H z 28M H z
D + 5
D + 5 D + 5
G N D
D G N D D G N D
SCSI.SCH
D + 5
C22 C24
0.01 0.01
C21
C25
C23
0.01 0.01
D G N D
37
N C
38
V SS
39
A TA _RE S
D D 7 40
A TA _D 7
D D 8 41
A TA _D 8
D D 6 42
A TA _D 6
D D 9 43
A TA _D 9
44
V SS
D D 5 45
A TA _D 5
D D 10 46
A TA _D 10
D D 4 47
A TA _D 4
D D 11 48
A TA _D 11
D D 3 49
A TA _D 3
D D 12 50
A TA _D 12
D + 5 D D 2 51
A TA _D 2
D D 13 52
A TA _D 13
D D 1 53
A TA _D 1
54
V D D
55
V D D
R96 D D 14 56
A TA _D 14
R95
D D 0 57
1K
1K A TA _D 0
D D 15 58
A TA _D 15
59
D M A RQ
60
D IO W
61
D IO R
62
IO RD Y _I
63
D M A CK
64
V SS
65
V SS
66
IN TRQ
67
A TA _A 1
68
A TA _A 0
69
A TA _A 2
70
CS1FX
71
V SS
72
V D D
R9
C30
5.6K
470P
R8
10K
D G N D
SCSI_CS
D M A _SEL
C29 R12
A TA 3
N O N 100
A TA 4
CPU
A D _D 1
SC_IN T7I A D _D 1
SCSI_TM O U T
R97
D + 5
28M H Z
1M
10 11
U 6E
74H CU 04
C28 20M H z
W 2
X 4
100p
N O N N O N
C910
D G N D C911
D G N D N O N 0
D G N D
D A _D [1..2]
D A _D [1..2]
LRCK
A D D A
BCK
M SCK
C912
33p
144
V D D
143
V SS
142
W R
141
RD
140
N C
139
A TA _I N T
138
M LRCK
137
D A CK _I
136
V SS
135
A TA _D REQ
134
RST
133
SLA V E
132
TCRC
131
U 5
TST2
130
G A 2
TCK 2
129
V D D
128
D IG ITA L_O U T_2
127
D IG ITA L_IN _2
126
D IG ITA L_O U T_1
125
D IG ITA L_IN _1
124
TEST
123
EX T_M CLK 2
122
FCO N T2
121
PD 2
120
PLL_SEL
119
FCO N T1
118
PD 1
117
EX T_M CLK 1
116
V SS
115
V D D
114
V A RI _256FS
113
V A RI _FS
112
SLA V E_M SCK
111
SLA V E_M LRCK
110
N C
109
N C
R17
1M
8
R14 R18
1M
0
6 5 C35
22p
R1 100
D A _D 1 U 6C
74H CU 04
R2 100
D A _D 2
R15
D G N D
0
X 1
22.5792M H z
R6 100
C31 C32
22p 22p
R5 100
R13 330
D G N D
D [0..15]
D [0..15]
A [0..18] CPU
A [0..18]
/CS1
CPU
/CS_ID E
IO RD Y 1
D + 5
C34
0.01
1 2 3 4
U 6A U 6B
74H CU 04 74H CU 04
D G N D
/W R
CPU
/RD
/A TA _IN T1
/A IRQ 1
CPU
/D A CK 1
/D REQ 1
CPU
/RST
C27
470p
D G N D
V CO 1
PLL_SEL PLL_SEL
FCO N T1 FCO N T1
PD 1 PD 1
EX T_M CLK 1 EX T_M CLK 1
V CO + 5
V A RI _256 V A RI _256 V CO + 5 V CO + 5
V A RI _FS V A RI _FS V CO G N D V CO G N D
V CO G N D
V C O 1
V CO 1.SCH
D + 5
J4
C20 2 4
R7
0.01
100
1 5
3 6
D G N D G PI F32T
D A TA O U T( O PT)
D + 5
D + 5
U 6D C26
9
10/16
74H CU 04
J5
C33 1 4
R10
R16
0.01
3.3K
330 3 5
X 2
2 6
R11
16.384M H z
2.2K
G PI F32R
C36 D A TA IN (O PT)
22p
D G N D