6-2 (b) BKPF-L753A
6-2 (b)
2
3
4
5
1
ABCDEFGH
ADA-55BOARD NO. 1-668-838-14
ADA-55
SUFFIX: -14 ADA-55
SUFFIX: -14
L-ch
L-ch
RV1:CMRR ADJ
RV1:CMRR ADJ
OUT-H
OUT-H
1 CMRR
1 CMRR
-8dB
-8dB
ON/OFF
ON/OFF
-4dB
-4dB
ON/OFF
ON/OFF
1 FINE
1 FINE
MONO
MONO
OUT-C
OUT-C
+4dB
+4dB
0dB
0dB
-10dB
-10dB
OUT-H
OUT-H
600
600
OUT-C
OUT-C
0dB
0dB
1 GAIN
1 GAIN
RV2:CMRR ADJ
RV2:CMRR ADJ
2 FINE
2 FINE
+4dB
+4dB
2 CMRR
2 CMRR
+8dB
+8dB
POWER
POWER
INPUT
INPUT
+8dB
+8dB
600
600
-4dB
-4dB
STEREO
STEREO
2 GAIN
2 GAIN
-8dB
-8dB
R-ch
R-ch
INPUT
INPUT
-10dB
-10dB
16V
16V
100uF
100uF
C88
C88
C16
C16
100uF
100uF
16V
16V
C18
C18
100uF
100uF
16V
16V
16V
16V
100uF
100uF
C89
C89
C17
C17
100uF
100uF
16V
16V
16V
16V
100uF
100uF
C87
C87
C19
C19
100uF
100uF
16V
16V
16V
16V
100uF
100uF
C86
C86
S2
S2
S1
S1
COP3
COP3
COP2
COP2
COP1
COP1
35V
35V
47uF
47uF
C74
C74
35V
35V
47uF
47uF
C75
C75
35V
35V
47uF
47uF
C76
C76
35V
35V
47uF
47uF
C77
C77
L1
L1
10uH
10uH
L2
L2
10uH
10uH
L3
L3
10uH
10uH
RV1
RV1
50
50
RV2
RV2
50
50
RV3
RV3
5k
5k
RV4
RV4
5k
5k
GND
GND
GND
GND
GND
GND
(5/48)
(5/48)
CN101
CN101
3k
3k
R141
R141
120
120
R85
R85
10
10
R145
R145
R20
R20
3.3k
3.3k
R26
R26
47
47
GND
GND
(10/48)
(10/48)
CN101
CN101
R4
R4
68
68
NM
NM
100k
100k
R149
R149
39pF
39pF
C85
C85
GND
GND
GND
GND
Q37
Q37
UN2221-TX
UN2221-TX
GND
GND
(19/48)
(19/48)
CN101
CN101
GND
GND
4.7
4.7
R118
R118
(15/48)
(15/48)
CN101
CN101
R2
R2
68
68
18k
18k
R89
R89
Q34
Q34
2SC3421-Y
2SC3421-Y
C25
C25
1uF
1uF
TP13
TP13
R83
R83
1.5k
1.5k
C44
C44
47uF
47uF
C41
C41
22pF
22pF
18k
18k
R93
R93
22
22
R73
R73
12V
12V
R55
R55
4.7k
4.7k
4.7
4.7
R112
R112
E2
E2
Q8
Q8
2SA812-T1-M5M6
2SA812-T1-M5M6
-12V
-12V
C24
C24
7pF
7pF
GND
GND
2.2k
2.2k
R24
R24
R56
R56
22
22
330
330
R143
R143
16V
16V
47uF
47uF
C63
C63
GND
GND
22
22
R75
R75
R48
R48
22
22
R74
R74
22
22
GND
GND
15k
15k
R12
R12
12V
12V
12V
12V
16V
16V
47uF
47uF
C69
C69
C11
C11
68pF
68pF
GND
GND
GND
GND
Q14
Q14
2SA812-T1-M5M6
2SA812-T1-M5M6
39pF
39pF
C80
C80
TP7
TP7
7pF
7pF
C59
C59
1uF
1uF
C61
C61
R42
R42
1.5k
1.5k
3k
3k
R76
R76
5.1k
5.1k
R46
R46
1k
1k
R104
R104
R17
R17
10k
10k
Q16
Q16
2SA812-T1-M5M6
2SA812-T1-M5M6
C33
C33
1uF
1uF
2.2
2.2
R96
R96
39pF
39pF
C83
C83
3k
3k
R60
R60
C71
C71
22pF
22pF
GND
GND
R27
R27
47
47
GND
GND
C66
C66
47uF
47uF
16V
16V
Q15
Q15
2SC1623-T1-L5L6
2SC1623-T1-L5L6
GND
GND
4.7
4.7
R111
R111
C13
C13
1uF
1uF
15k
15k
R7
R7
820
820
R147
R147
C14
C14
1uF
1uF
16V
16V
47uF
47uF
C4
C4
Q28
Q28
2SA812-T1-M5M6
2SA812-T1-M5M6
C45
C45
47uF
47uF
4.7
4.7
R120
R120
3k
3k
R50
R50
C22
C22
1uF
1uF
C52
C52
1uF
1uF
22
22
R62
R62
GND
GND
IC2
IC2
NJM5534M(TE2)
NJM5534M(TE2)
4.7
4.7
R113
R113
Q22
Q22
2SA812-T1-M5M6
2SA812-T1-M5M6
GND
GND
C48
C48
1uF
1uF
1uF
1uF
C95
C95
Q33
Q33
2SA1358-Y
2SA1358-Y
1k
1k
R9
R9
GND
GND
-12V
-12V
Q3
Q3
2SA812-T1-M5M6
2SA812-T1-M5M6
(44/48)
(44/48)
CN101
CN101
7pF
7pF
C55
C55
Q10
Q10
2SA812-T1-M5M6
2SA812-T1-M5M6
R70
R70
22
22
GND
GND
Q23
Q23
2SC1623-T1-L5L6
2SC1623-T1-L5L6
(35/48)
(35/48)
CN101
CN101
(30/48)
(30/48)
CN101
CN101
GND
GND
R8
R8
220
220
2.2
2.2
R97
R97
GND
GND
COR3
COR3
30k
30k
R43
R43
GND
GND
-12V
-12V
IC1
IC1
NJM5534M(TE2)
NJM5534M(TE2)
(27/48)
(27/48)
CN101
CN101
IC6
IC6
NJM5534M(TE2)
NJM5534M(TE2)
22
22
R127
R127
(3/48)
(3/48)
CN101
CN101
R64
R64
3k
3k
22
22
R128
R128
2.2k
2.2k
R21
R21
(23/48)
(23/48)
CN101
CN101
4.7
4.7
R116
R116
(18/48)
(18/48)
CN101
CN101
22
22
R71
R71
R23
R23
3.3k
3.3k
(4/48)
(4/48)
CN101
CN101
18k
18k
R94
R94
-12V
-12V
12V
12V
TP4
TP4
C34
C34
47uF
47uF
16V
16V
1uF
1uF
C53
C53
GND
GND
(38/48)
(38/48)
CN101
CN101
-12V
-12V
4.7
4.7
R122
R122
(32/48)
(32/48)
CN101
CN101
GND
GND
R58
R58
1.5k
1.5k
C60
C60
1uF
1uF
(7/48)
(7/48)
CN101
CN101
2A
2A
PS1
PS1
12V
12V
Q27
Q27
2SC1623-T1-L5L6
2SC1623-T1-L5L6
E1
E1
R35
R35
5.6k
5.6k
16V
16V
47uF
47uF
C67
C67
12V
12V
-12V
-12V
R18
R18
10k
10k
GND
GND
(9/48)
(9/48)
CN101
CN101
NM
NM
1uF
1uF
C98
C98
1uF
1uF
C23
C23
120
120
R87
R87
GND
GND
C62
C62
47uF
47uF
16V
16V
22
22
R129
R129
R16
R16
10k
10k
(12/48)
(12/48)
CN101
CN101
-12V
-12V
Q21
Q21
2SC1623-T1-L5L6
2SC1623-T1-L5L6
R68
R68
22
22
(42/48)
(42/48)
CN101
CN101
820
820
R146
R146
C31
C31
47uF
47uF
16V
16V
GND
GND
22
22
R124
R124
GND
GND
R30
R30
2.2k
2.2k
GND
GND
(14/48)
(14/48)
CN101
CN101
R15
R15
10k
10k
1uF
1uF
C91
C91
18k
18k
R95
R95
GND
GND
GND
GND
R19
R19
3.3k
3.3k
D1
D1
CL-155UR/G-DT
CL-155UR/G-DT
G
R
Q25
Q25
2SC1623-T1-L5L6
2SC1623-T1-L5L6
C36
C36
7pF
7pF
3k
3k
R77
R77
C43
C43
47uF
47uF
C10
C10
47uF
47uF
16V
16V
12V
12V
GND
GND
120
120
R86
R86
2.2
2.2
R99
R99
33k
33k
R6
R6
22
22
R53
R53
GND
GND
NM
NM
IC11
IC11
PCF8574AT
PCF8574AT
GND
GND
1k
1k
R103
R103
C21
C21
1uF
1uF
Q18
Q18
2SA812-T1-M5M6
2SA812-T1-M5M6
TP5
TP5
R34
R34
5.6k
5.6k
30k
30k
R36
R36
1uF
1uF
C92
C92
GND
GND
GND
GND
1uF
1uF
C38
C38
GND
GND
GND
GND
4.7
4.7
R115
R115
Q17
Q17
2SC1623-T1-L5L6
2SC1623-T1-L5L6
13k
13k
R11
R11
GND
GND
1k
1k
R107
R107
1k
1k
R102
R102
Q29
Q29
2SA1358-Y
2SA1358-Y
R28
R28
47
47
IC8
IC8
NJM5534M(TE2)
NJM5534M(TE2)
C30
C30
47uF
47uF
16V
16V
IC5
IC5
NJM5534M(TE2)
NJM5534M(TE2)
R31
R31
2.2k
2.2k
Q6
Q6
2SA812-T1-M5M6
2SA812-T1-M5M6
Q20
Q20
2SA812-T1-M5M6
2SA812-T1-M5M6
GND
GND
1uF
1uF
C49
C49
12k
12k
R45
R45
GND
GND
18k
18k
R90
R90
IC4
IC4
NJM5534M(TE2)
NJM5534M(TE2)
1uF
1uF
C96
C96
R57
R57
22
22
Q19
Q19
2SC1623-T1-L5L6
2SC1623-T1-L5L6
R72
R72
22
22
1k
1k
R100
R100
3k
3k
R78
R78
10pF
10pF
C58
C58
-12V
-12V
Q13
Q13
2SC1623-T1-L5L6
2SC1623-T1-L5L6
R65
R65
3k
3k
12k
12k
R38
R38
4.7
4.7
R117
R117
12V
12V
10pF
10pF
C46
C46
Q12
Q12
2SA812-T1-M5M6
2SA812-T1-M5M6
C39
C39
47uF
47uF
16V
16V
GND
GND
C5
C5
47uF
47uF
16V
16V
-12V
-12V
(43/48)
(43/48)
CN101
CN101
C68
C68
47uF
47uF
16V
16V
GND
GND
6.3V
6.3V
47uF
47uF
C2
C2
GND
GND
16V
16V
47uF
47uF
C28
C28
R66
R66
3k
3k
(36/48)
(36/48)
CN101
CN101
(29/48)
(29/48)
CN101
CN101
GND
GND
C12
C12
1uF
1uF
GND
GND
C72
C72
22pF
22pF
12V
12V
10k
10k
R14
R14
GND
GND
22
22
R131
R131
Q24
Q24
2SA812-T1-M5M6
2SA812-T1-M5M6
(26/48)
(26/48)
CN101
CN101
1k
1k
R105
R105
R41
R41
3.3k
3.3k
R54
R54
3.3k
3.3k
IC10
IC10
NJM5534M(TE2)
NJM5534M(TE2)
-12V
-12V
GND
GND
39pF
39pF
C81
C81
(22/48)
(22/48)
CN101
CN101
39pF
39pF
C84
C84
1k
1k
R101
R101
R22
R22
3.3k
3.3k
C29
C29
22pF
22pF
1uF
1uF
C94
C94
(1/48)
(1/48)
CN101
CN101
10
10
R142
R142
(17/48)
(17/48)
CN101
CN101
GND
GND
C56
C56
1uF
1uF
GND
GND
22
22
R126
R126
12V
12V
R52
R52
22
22
R32
R32
10
10
C9
C9
47uF
47uF
16V
16V
GND
GND
12V
12V
18k
18k
R91
R91
R61
R61
22
22
5.1k
5.1k
R39
R39
C6
C6
47uF
47uF
16V
16V
GND
GND
39pF
39pF
C82
C82
(31/48)
(31/48)
CN101
CN101
22
22
R139
R139
(37/48)
(37/48)
CN101
CN101
(2/48)
(2/48)
CN101
CN101
12V
12V
4.7
4.7
R108
R108
Q31
Q31
2SA1358-Y
2SA1358-Y
4.7
4.7
R110
R110
GND
GND
TP9
TP9
4.7
4.7
R119
R119
R1
R1
330
330
Q7
Q7
2SC1623-T1-L5L6
2SC1623-T1-L5L6
-12V
-12V
R49
R49
22
22
(8/48)
(8/48)
CN101
CN101
R33
R33
10
10
22
22
R136
R136
GND
GND
(11/48)
(11/48)
CN101
CN101
18k
18k
R88
R88
22
22
R132
R132
(24/48)
(24/48)
CN101
CN101
(20/48)
(20/48)
CN101
CN101
2.2
2.2
R98
R98
12V
12V
GND
GND
12V
12V
GND
GND
12V
12V
7pF
7pF
C51
C51
C42
C42
47uF
47uF
-12V
-12V
-12V
-12V
(13/48)
(13/48)
CN101
CN101
TP6
TP6
C32
C32
1uF
1uF
1uF
1uF
C97
C97
GND
GND
GND
GND
330
330
R140
R140
GND
GND
Q11
Q11
2SC1623-T1-L5L6
2SC1623-T1-L5L6
Q1
Q1
2SC1623-T1-L5L6
2SC1623-T1-L5L6
C35
C35
47uF
47uF
16V
16V
GND
GND
5.1k
5.1k
R40
R40
R80
R80
1.5k
1.5k
22
22
R138
R138
1uF
1uF
C1
C1
GND
GND
C64
C64
47uF
47uF
16V
16V
GND
GND
GND
GND
TP12
TP12
C15
C15
1uF
1uF
GND
GND
R10
R10
220
220
5.1k
5.1k
R47
R47
C73
C73
22pF
22pF
-12V
-12V
22
22
R130
R130
120
120
R84
R84
-12V
-12V
IC7
IC7
NJM5534M(TE2)
NJM5534M(TE2)
NM
NM
DD36
DD36
GND
GND
12V
12V
-12V
-12V
Q2
Q2
2SC1623-T1-L5L6
2SC1623-T1-L5L6
GND
GND
22
22
R133
R133
C27
C27
47uF
47uF
16V
16V
GND
GND
39pF
39pF
C79
C79
1uF
1uF
C90
C90
IC9
IC9
NJM5534M(TE2)
NJM5534M(TE2)
Q35
Q35
2SA1358-Y
2SA1358-Y
C70
C70
22pF
22pF
C8
C8
68pF
68pF
3k
3k
R59
R59
(41/48)
(41/48)
CN101
CN101
NM
NM
RB2
RB2
100k
100k
Q4
Q4
2SC1623-T1-L5L6
2SC1623-T1-L5L6
33k
33k
R5
R5
18k
18k
R92
R92
10pF
10pF
C50
C50
4.7
4.7
R121
R121
R81
R81
1.5k
1.5k
Q9
Q9
2SC1623-T1-L5L6
2SC1623-T1-L5L6
20k
20k
R37
R37
E3
E3
100k
100k
R148
R148
1uF
1uF
C57
C57
COR1
COR1
GND
GND
1k
1k
R25
R25
3k
3k
R51
R51
GND
GND
10pF
10pF
C54
C54
GND
GND
GND
GND
C20
C20
1uF
1uF
TP10
TP10
GND
GND
TP8
TP8
22
22
R69
R69
(6/48)
(6/48)
CN101
CN101
GND
GND
20k
20k
R44
R44
-12V
-12V
22
22
R135
R135
Q26
Q26
2SA812-T1-M5M6
2SA812-T1-M5M6
GND
GND
4.7
4.7
R123
R123
12V
12V
4.7
4.7
R114
R114
GND
GND
GND
GND
GND
GND
(34/48)
(34/48)
CN101
CN101
GND
GND
22
22
R134
R134
Q30
Q30
2SC3421-Y
2SC3421-Y
Q32
Q32
2SC3421-Y
2SC3421-Y
TP11
TP11
TP14
TP14
3k
3k
R144
R144
R29
R29
47
47
4.7
4.7
R109
R109
16V
16V
47uF
47uF
C65
C65
(28/48)
(28/48)
CN101
CN101
1uF
1uF
C93
C93
22
22
R137
R137
GND
GND
(25/48)
(25/48)
CN101
CN101
R63
R63
4.7k
4.7k
39pF
39pF
C78
C78
(21/48)
(21/48)
CN101
CN101
Q36
Q36
2SC3421-Y
2SC3421-Y
-12V
-12V
(16/48)
(16/48)
CN101
CN101
3k
3k
R79
R79
C7
C7
47uF
47uF
16V
16V
7pF
7pF
C47
C47
10k
10k
R13
R13
COR2
COR2
TP3
TP3
TP1
TP1
16V
16V
47uF
47uF
C40
C40
R82
R82
1.5k
1.5k
GND
GND
TP2
TP2
(39/48)
(39/48)
CN101
CN101
1uF
1uF
C3
C3
IC3
IC3
NJM5534M(TE2)
NJM5534M(TE2)
C26
C26
1uF
1uF
(33/48)
(33/48)
CN101
CN101
R67
R67
3k
3k
22
22
R125
R125
12V
12V
R3
R3
330
330
Q5
Q5
2SC1623-T1-L5L6
2SC1623-T1-L5L6
C37
C37
1uF
1uF
1k
1k
R106
R106
3
2
1
3
2
1
3
2
1
3
2
1
GND
GND
5
GND
GND
10
10
GND
GND
19
19
OUT_L(+)3
OUT_L(+)3
15
15
4
V-
V-
5
CP2
CP2
8
CP1
CP1
1
BAL
BAL
7
V+
V+
3
+
6
OUT
OUT
2
-
SCL
SCL
44
44
CARD_ADRS1
CARD_ADRS1
35
35
OUT_R(-)3
OUT_R(-)3
30
30
3
2
1
4
V-
V-
5
CP2
CP2
8
CP1
CP1
1
BAL
BAL
7
V+
V+
3
+
6
OUT
OUT
2
-
OUT_R(+)3
OUT_R(+)3
27
27
4
V-
V-
5
CP2
CP2
8
CP1
CP1
1
BAL
BAL
7
V+
V+
3
+
6
OUT
OUT
2
-
IN_L_(-)
IN_L_(-)
3
OUT_R(+)4
OUT_R(+)4
23
23
OUT_L(-)3
OUT_L(-)3
18
18
IN_R(+)
IN_R(+)
4
+5V
+5V
38
38
GND
GND
32
32
GND
GND
7
GND
GND
9
GND
GND
12
12
DIAG
DIAG
42
42
OUT_L(+)2
OUT_L(+)2
14
14
43
21
12
12
P7
P7
11
11
P6
P6
10
10
P5
P5
9
P4
P4
7
P3
P3
6
P2
P2
5
P1
P1
13
13
INT
INT
1
A0
A0
2
A1
A1
3
A2
A2
14
14
SCL
SCL
8
VSS
VSS
16
16
VDD
VDD
4
P0
P0
15
15
SDA
SDA
4
V-
V-
5
CP2
CP2
8
CP1
CP1
1
BAL
BAL
7
V+
V+
3
+
6
OUT
OUT
2
-
4
V-
V-
5
CP2
CP2
8
CP1
CP1
1
BAL
BAL
7
V+
V+
3
+
6
OUT
OUT
2
-
4
V-
V-
5
CP2
CP2
8
CP1
CP1
1
BAL
BAL
7
V+
V+
3
+
6
OUT
OUT
2
-
SDA
SDA
43
43
CARD_ADRS2
CARD_ADRS2
36
36
OUT_R(-)2
OUT_R(-)2
29
29
OUT_R(+)2
OUT_R(+)2
26
26
4
V-
V-
5
CP2
CP2
8
CP1
CP1
1
BAL
BAL
7
V+
V+
3
+
6
OUT
OUT
2
-
OUT_R(-)4
OUT_R(-)4
22
22
IN_R(-)
IN_R(-)
1
OUT_L(-)2
OUT_L(-)2
17
17
GND
GND
31
31
+5V
+5V
37
37
GND
GND
2
GND
GND
8
GND
GND
11
11
GND
GND
24
24
OUT_L(+)4
OUT_L(+)4
20
20
OUT_L(+)1
OUT_L(+)1
13
13
4
V-
V-
5
CP2
CP2
8
CP1
CP1
1
BAL
BAL
7
V+
V+
3
+
6
OUT
OUT
2
-
3
-VOUT
-VOUT
7
6
4
COM
COM
2
-VIN
-VIN
1+VIN
+VIN
5
+VOUT
+VOUT
4
V-
V-
5
CP2
CP2
8
CP1
CP1
1
BAL
BAL
7
V+
V+
3
+
6
OUT
OUT
2
-
LOAD
LOAD
41
41
8 7
6 5
4 3
2 1
10
10
9
8
6
7
5
4
2
3
1
IN_L_(+)
IN_L_(+)
6
CARD_ADRS0
CARD_ADRS0
34
34
OUT_R(-)1
OUT_R(-)1
28
28
OUT_R(+)1
OUT_R(+)1
25
25
OUT_L(-)4
OUT_L(-)4
21
21
OUT_L(-)1
OUT_L(-)1
16
16
10
10
9
8
6
7
5
4
2
3
1
+5V
+5V
39
39
4
V-
V-
5
CP2
CP2
8
CP1
CP1
1
BAL
BAL
7
V+
V+
3
+
6
OUT
OUT
2
-
GND
GND
33
33
!
11
RV3:GAIN ADJ.1 1
RV4:GAIN ADJ.