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+15V
R131
26.7
R305
100
CH.A
TP8
A
3
2
187
6
45
U4
5534A
R127
2.00K
4
3
2
K27B
C120
0.1UF
+15V
3
2
8
4
1
U3A
LT1124
C118
0.1UF
R120
47.5
+AIN
2V FS
C112
2.2UF
4
3
2
K20B
DS3
TP53
IN2A
4
3
2
K26B
4
3
2
K5B
CHANNEL A INPUT
STAR input gnd
COM
HOT
C107 GOES ON
CONNECTOR BD
CH
A
A
C107
.015UF
1 3
2
FL5
1 3
2
FL4
CH
J2
CONNECTS
TO J10
1
1
2
3
4
J2
A2
XLR
BOARD
8
J30
CONNECTS
TO J14
A5
AUDIO
1
2
3
4
J30
COLD
CALA+
A
A
A
AA
H1
6
R321
1.00K
R46
50.0K
R28
25.0K
R41
12.0K
R42
500
10 1
K31A
4
3
2
K31B
7
8
9
K31C
TP51
TP52
8V FS
125V FS
32V FS
A
1
2
3
4
5
6
7
8
J1
A
STAR
input
gnd
1
2
3
4
5
6
7
8
J200
C113
190PF
C114
470PF
125 VRMS FS
= 177V pk
32V RMS =
= 11.3V pk
8V RMS
45.2V pk
4
3
2
K21B
4
3
2
K22B
4
3
2
K23B
CR17
CR18
A0
A1
-15V
1
8
9
16
2
7
10
15
3
6
11
14
13
12
4
5
U20
DG412
C301
33PF
CR28
CR19
6 dB
A
A
A
R94
2.00K
R95
1.00K
7
8
9
K27C
R100
2.162K
C121
0.1UF
R128
15.00K
R102
124
R99
1.00K
C110
33PF
C119
33PF
C324
10PF
-15V
A
R129
150
R130
15.00K
R96
1.00K
A5
3
R97
2.162K
R98
124
C122
33PF
C123
470PF
C323
10PF
ARANGE
G5
6
R337
1.00K
CHANNEL A
INPUT AMPLIFIER
12 dB
12 dB
+5VD
CHA_18DBGAIN
R101
2.00K
R104
1.00K
10 1
K27A
A2
A1
A2
A
+15V
-15V
+5V R
R
R
-15V
VR1
10V
1
8
9
16
2
7
10
15
3
6
11
14
13
12
4
5
U17
DG412
R123
1.00K
CR23
+15V
A
VR2
10V
R122
1.00K
CR22
A COMP
R307
249K
C335
7-45PF
C336
51PF
A
+5VD
R49
6.0K
R50
250
R51
3.01K
R52
115
R53
1.50K
MAX
30V RMS
GENSOURCEA
4
3
2
K29B
R306
200
R284
300
R296
18.2
4
3
2
K2B
BASE
6
COLL
5
EMIT
4
D1
1
D2
2
NC
3
U114
H11AAX
R297
20.5K
GEN.
BOARD
MAX
30V RMS
+5VD
10 1
K29A
R283
300
7
8
9
K29C
7
8
9
K2C
ISOTERMA
1 3
2
FL6
R54
61.9
R281
1.50K
ATTENUATOR BD.
A1A4 INPUT
R282
61.9
7
8
9
K26C
7
8
9
K5C
C124
2.2UF
7
8
9
K20C
DS4
TP56
R124
47.5
-AIN
CR20
A0
+15V
+5V
-15V
R
6
5
7
U3B
LT1124
C302
33PF
CR21
6 dB
A
R103
2.00K
R136
2.00K
C111
33PF
TP6
AA
TP7 TP9
7
8
9
K21C
7
8
9
K22C
7
8
9
K23C
A
1
2
3
4
5
6
7
8
J1
A
STAR
input
gnd
1
2
3
4
5
6
7
8
J201
C125
190PF
C126
470PF
2NORM/CAL
IN2B
+5VD
+5VD
R46
50.0K
R28
25.0K
R41
12.0K
R42
500
SOURCE:
INPUT/
10 1
K26A
10 1
K5A
TP54
TP55
CALA-
BCALA
A
+5VD
GENSOURCEA
H1
6
G2
6
CHA_TERM
(CLEARTRIP)
C2
6
600 TERM IN/OUT
A
(TERMA)
10 1
K2A
R300
2.74K
D
2
Q
5
CK
3
Q
6
P
R
4
C
L
1
U115A
74ALS74
C332
0.1UF
R298
10.0K
G4
6
R299
5.11K
CR32
Q3
CR40
+5VD
R49
6.0K
R50
250
R51
3.01K
R52
115
R53
1.50K
GENERATOR
UNITY GAIN
24 dB ATTEN
36 dB ATTEN
12 dB ATTEN
10 1
K20A
+5VD
+5VD
+5VD
+5VD
10 1
K21A
10 1
K22A
10 1
K23A
A[0..3]
A3
CHA_GAIN[0..3]
E4
6
R54
61.9
R281
1.50K
ATTENUATOR BD.
A1A5 INPUT
UNITY_GAIN
12DBATTEN
24DBATTEN
36DBATTEN
GENSOURCEA
ISOTERMA
+5VD
CH218DBGAIN
R282
61.9
C300
0.1UF
AGENSOURCE
CHA_150TERM
ATTEN[0..3]
ATTEN0
ATTEN1
ATTEN2
ATTEN3
A
A
A3
+5VD
IN2
2
IN3
3
IN4
4
IN5
5
IN6
6
IN7
7
D2
15
D3
14
D4
13
D5
12
D7
10
IN1
1
CLAMP
9
GND
8
D1
16
D6
11
U103
MC1413
CHA_ATTEN[0..3]
C3
6
E4
6
E4
E36
AM 700 CHA INPUT & A1A4 & A1A5 ATTENUATOR BOARDS
PART OF A1A1 ANALOG ACQUISITION BOARD
1
A1A1 Analog Acquisition Board
Locator Chart on previous page.
Use this chart to find components
on A1A1 board schematic 1.