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6-2 (a)
BKPF-L753A
6-2 (a)
2
3
4
5
1
ABCDEFGH
ADA-55
BOARD NO. 1-668-838-11, 12
R129
R128
R106
1k
1uF
C37
2SC1623-T1-L5L6
Q5
330
R3
12V
R125
22
3k
R67
33
GND
1uF
C26
NJM5534M(TE2)
IC3
-
2
OUT
6
+
3V+
7
BAL
1
CP1
8
CP2
5
V-
4
C3
1uF
39
+5V
TP2
GND
1.5k
R82
C40
47uF
16V
TP1
TP3
COR2
1
3
2
4
5
7
6
8
910
R13
10k
C47
7pF
16V
47uF
C7
R79
3k
CN101
16
OUT_L(-)1
5k
RV4
1
2
3
-12V
2SC3421-Y
Q36
21
OUT_L(-)4
C78
39pF
4.7k
R63
25
OUT_R(+)1
GND
C93
1uF
28
OUT_R(-)1
C65
47uF
16V
R109
4.7
47
R29
R144
3k
TP14
TP11
2SC3421-Y
Q32
2SC3421-Y
Q30
GND
34
CARD_ADRS0
GND
GND
GND
R114
4.7
12V
R123
4.7
GND
2SA812-T1-M5M6
Q26
-12V
R44
20k
GND
CN101
6
IN_L_(+)
R69
22
TP8
GND
TP10
1uF
C20
GND
GND
C54
10pF
GND
R51
3k
R25
1k
GND
COR1
1
3
2
4
5
7
6
8
910
C57
1uF
R148
100k
E3
R37
20k
2SC1623-T1-L5L6
Q9
1.5k
R81
R121
4.7
C50
10pF
R92
18k
R5
33k
2SC1623-T1-L5L6
Q4
100kx4
RB2
12
34
56
78
CN101
41
LOAD
R59
3k
68pF
C8
22pF
C70
2SA1358-Y
Q35
NJM5534M(TE2)
IC9
-
2
OUT
6
+
3V+
7
BAL
1
CP1
8
CP2
5
V-
4
C90
1uF
C79
39pF
GND
16V
47uF
C22
16V
100uF
C99
GND
2SC1623-T1-L5L6
Q2
-12V
12V
GND
(DD-36 BOARD)
DD1
+VOUT
5
+VIN
1
-VIN
2
COM
4
6
7
-VOUT
3
NJM5534M(TE2)
IC7
-
2
OUT
6
+
3V+
7
BAL
1
CP1
8
CP2
5
V-
4
-12V
R84
120
R130
-12V
C87
100uF
16V
22pF
C73
R47
5.1k
220
R10
GND
1uF
C15
TP12
GND
GND
16V
47uF
C64
GND
C1
1uF
1.5k
R80
R40
5.1k
GND
16V
47uF
C35
2SC1623-T1-L5L6
Q1
2SC1623-T1-L5L6
Q11
GND
R140 330
GND
GND
C97
1uF
1uF
C32
TP6
CN101
13
OUT_L(+)1
-12V
-12V
47uF
C42
C51
7pF
12V
GND
12V
GND
12V
R98
2.2
20
OUT_L(+)4
24
GND
R88
18k
11
GND
GND
10
R33
8
GND
22
R49
-12V
2SC1623-T1-L5L6
Q7
330
R1
R119
4.7
TP9
GND
R110
4.7
2SA1358-Y
Q31
R108
4.7
12V
CN101
2
GND
CN101
CN101
37
+5V
31
GND
C82
39pF
GND
16V
47uF
C6
R39 5.1k
22
R61
R91
18k
12V
GND
16V
47uF
C9
10
R32
22
R52
12V
R126
22
GND
1uF
C56
GND
17
OUT_L(-)2
R142 10
CN101
1
IN_R(-)
C94
1uF
22pF
C29
3.3k
R22
5k
RV3
1
2
3
R101
1k
C84
39pF
22
OUT_R(-)4
C81
39pF
GND
-12V
NJM5534M(TE2)
IC10
-
2
OUT
6
+
3V+
7
BAL
1
CP1
8
CP2
5
V-
4
3.3k
R54
3.3k
R41
R105
1k
26
OUT_R(+)2
10uH
L2
2SA812-T1-M5M6
Q24
50
RV1
1
2
3
GND
R14
10k
12V
22pF
C72
GND
1uF
C12
GND
29
OUT_R(-)2
36
CARD_ADRS2
3k
R66
C28
47uF
16V
C77
47uF
35V
GND
C2
47uF
6.3V
GND
16V
47uF
C60
CN101
43
SDA
-12V
16V
47uF
C5
GND
16V
47uF
C39
2SA812-T1-M5M6
Q12
C46
10pF
12V
R117
4.7
R38
12k
3k
R65
2SC1623-T1-L5L6
Q13
-12V
C58
10pF
R78
3k
R100
1k
22
R72
2SC1623-T1-L5L6
Q19
22
R57
C96
1uF
NJM5534M(TE2)
IC4
-
2
OUT
6
+
3V+
7
BAL
1
CP1
8
CP2
5
V-
4
R90
18k
GND
R45
12k
C49
1uF
GND
2SA812-T1-M5M6
Q20
2SA812-T1-M5M6
Q6
S1
1
2
3
2.2k
R31
NJM5534M(TE2)
IC5
-
2
OUT
6
+
3V+
7
BAL
1
CP1
8
CP2
5
V-
4
16V
47uF
C30
NJM5534M(TE2)
IC8
-
2
OUT
6
+
3V+
7
BAL
1
CP1
8
CP2
5
V-
4
47
R28
2SA1358-Y
Q29
R102
1k
R107
1k
GND
R11
13k
2SC1623-T1-L5L6
Q17
R115
4.7
GND
GND
C38
1uF
GND
GND
C92
1uF
R36
30k
5.6k
R34
TP5
2SA812-T1-M5M6
Q18
1uF
C21
R103
1k
GND
PCF8574AT
IC11
SDA
15
P0
4
VDD
16
VSS
8
SCL
14
A2
3
A1
2
A0
1
INT
13
P1
5
P2
6
P3
7
P4
9
P5
10
P6
11
P7
12
GND
C89
100uF
16V
R53
22
R6
33k
R99
2.2
R86
120
GND
12V
16V
47uF
C10
47uF
C43
R77
3k
7pF
C36
2SC1623-T1-L5L6
Q25
C74
47uF
35V
R
G
CL-155UR/G-D
D1
1
2
3
4
3.3k
R19
GND
GND
16V
100uF
C100
R95
18k
C91
1uF
10k
R15
14
OUT_L(+)2
GND
2.2k
R30
GND
R124
*:R124-127:1W TYPE
*:R128-131:1W TYPE
22
GND
16V
47uF
C31
R146 820
CN101
42
DIAG
22
R68
2SC1623-T1-L5L6
Q21
-12V
12
GND
10k
R16
16V
47uF
C62
GND
R87
120
C23
1uF
C98
1uF
9
GND
GND
10k
R18
-12V
12V
C67
47uF
16V
5.6k
R35
E1
2SC1623-T1-L5L6
Q27
12V
2A
!
PS1
7
GND
1uF
C68
1.5k
R58
GND
32
GND
R122
4.7
-12V
38
+5V
GND
C53
1uF
16V
47uF
C34
TP4
12V
C88
100uF
16V
-12V
R94
18k
CN101
4
IN_R(+)
3.3k
R23
R71
22
18
OUT_L(-)3
R116
4.7
23
OUT_R(+)4
R21
2.2k
22
22
22
22
3k
R64
CN101
3
IN_L_(-)
R127
22
NJM5534M(TE2)
IC6
-
2
OUT
6
+
3V+
7
BAL
1
CP1
8
CP2
5
V-
4
27
OUT_R(+)3
NJM5534M(TE2)
IC1
-
2
OUT
6
+
3V+
7
BAL
1
CP1
8
CP2
5
V-
4
-12V
GND
R43
30k
COR3
1
2
3
GND
R97
2.2
220
R8
GND
30
OUT_R(-)3
35
CARD_ADRS1
2SC1623-T1-L5L6
Q23
GND
22
R70
2SA812-T1-M5M6
Q10
C55
7pF
44
SCL
2SA812-T1-M5M6
Q3
10uH
L3
-12V
GND
R9
1k
2SA1358-Y
Q33
C95
1uF
1uF
C48
GND
2SA812-T1-M5M6
Q22
C76
47uF
35V
R113
4.7
NJM5534M(TE2)
IC2
-
2
OUT
6
+
-
+
-
+
-
+
-
+
-
+
-
+
3
V+
7
BAL
1
CP1
8
CP2
5
V-
4
GND
R62
22
1uF
C52
1uF
C27
R50
3k
R120
4.7
47uF
C45
C86
100uF
16V
2SA812-T1-M5M6
Q28
C4
47uF
16V
1uF
C14
R147
820
R7
15k
1uF
C13
R111
4.7
GND
2SC1623-T1-L5L6
Q15
16V
100uF
C16
16V
47uF
C66
GND
47
R27
GND
22pF
C71
10uH
L1
R60
3k
C83
39pF
R96
2.2
1uF
C33
2SA812-T1-M5M6
Q16
10k
R17
R104
1k
R46 5.1k
R76 3k
1.5k
R42
C61
1uF
C59
7pF
TP7
C80
39pF
2SA812-T1-M5M6
Q14
GND
68pF
C11
C69
47uF
16V
12V
12V
R12
15k
GND
22
R74
22
R48
R75
22
GND
C63
47uF
16V
R143
330
22
R56
R24 2.2k
7pF
C24
-12V
2SA812-T1-M5M6
Q8
E2
R112
4.7
4.7k
R55
12V
R73
22
R93
18k
22pF
C41
47uF
C44
C75
47uF
35V
1.5k
R83
TP13
1uF
C25
2SC3421-Y
Q34
R89
18k
68
R2
15
OUT_L(+)3
R118
4.7
GND
19
GND
GND
UN2221-TX
Q37
GND
GND
C85
39pF
R149
100k
68
R4
10
GND
GND
47
R26
3.3k
R20
R145
10
R85
120
R141 3k
5
GND
GND
S2
1
2
3
16V
100uF
C101
-10dB
INPUT
R-ch
-8dB
2 GAIN
STEREO
-4dB
600Ω
+8dB
INPUT
POWER
+8dB
2 CMRR
+4dB
2 FINE
1
RV3:GAIN ADJ.
1
RV2:CMRR ADJ.
1 GAIN
0dB
OUT-C
600Ω
ON
OFF
OUT-H
-10dB
0dB
+4dB
OUT-C
MONO
1 FINE
ON/OFF
-4dB
ON/OFF
-8dB
1 CMRR
OUT-H
1
RV1:CMRR ADJ.
S/N 10001-10290 ONLY
1
RV4:GAIN ADJ.
L-ch
R131
R133
R132
CN101
R134
*:R132-135:1W TYPE
22
22
22
22
R135
R137
R136
CN101
R138
*:R136-139:1W TYPE
22
22
22
22
R139
33
R201
20
RV1
1
2
3
GND GND
-
+
-
+
-
+
-
+
ON
OFF
50
RV2
1
2
3
33
R202
20
RV2
1
2
3
GND GND
GND GND
S/N 10001-10290 ONLY
S/N 10001-11870
ADA-55
SUFFIX: -11, 12
ADA-55
SUFFIX: -11, 12