AT
AV
AS
AU
AX
AW
AZ
AY
BA
BB
BC
AP
AR
AO
AQ
5
4
3
2
1
Lch
GND
Rch
HP
D.GND
1
2
3
4
5
GND
SWch
SRch
Sch/SLch
Cch
Rch
GND
Lch
GND
MIC
5
10
9
8
7
6
4
3
2
1
11
12
13
14
15
HPMUTE
HPDET
DGND
+5.6V
-30V
ROUT
B-LI
16
B-RO
DGND
13
14
15
B-LO
LOUT
TN-R
RECR
10
11
12
TN-L
VR-R
RECL
VR-L
7
NBLI
9
NBLO
8
L I
N
R IN
6
VREF
5
LPVD
27
29
28
30
31
33
32
39
36
34
35
37
38
26
25
23
24
22
SCL
B-RI
17
SDA
M-LO
AGND
M-LI
20
19
18
T-
R
M-RI
21
M-RO
T-
L
SELECTOR
INPUT
LOUDNESS
MUTE
SUPPLY
LATCHES
SERIAL BUS
SOFT
MUTE
LOUDNESS
MUTE
10
9
8
6
5
3
2
4
7
1
11
12
13
15
16
18
19
17
14
20
20
14
17
19
18
16
15
13
12
11
1
7
4
2
3
5
6
8
9
10
MUTE
LOUDNESS
MUTE
SOFT
SERIAL BUS
LATCHES
SUPPLY
MUTE
LOUDNESS
INPUT
SELECTOR
1
2
3
8
C69 1u50
R111
R105 22K
R107
5.1K
22u50
C63
+
R109 22K
1K
R115
2.2K
R103
+
C61 1u50
R101 220K
47 1W
C62
1u50
+
R104
2.2K
C70
1u50
+
R102 220K
R116
1K
R1
10 22K
+
C64
22u50
5.1K
R108
5
6
4
7
R106 22K
1W
47
R112
C80 390P
C79 0.01
C99 47u16
+
1
2
3
8
4.3K
R3
R1 10K
22K
R221
+
3.3u50
C15
R13 47K
R5
1.8K
100u10
C7
+
R19 3.3K
R17 18K
1
2
3
8
0.082
C1
0.082
C3
R7 30K
R9
R11 330
22
R23
C1
1
22
R25
+
10u50
C13
IC1-4
Q1,2,5-8
15K
R2 10K
R4
4.3K
C16
3.3u50
+
R222
22K
R14 47K
100u10
C8
+
3.3K
R20
5
6
7
4
R18 18K
1.8K
R6
C2
0.082
C4
0.082
R8 30K
4
7
5
6
R12 330
15K
R10
C12
R24
22
R26
22
C14
10u50
+
C72 1000P
C71 0.01
1
2
3
8
+
2.2u50
C36
4.3K
R62
C34
22
R71
22
R72
+
C35 10u50
R61 15K
22K
R225
R67 47K
R63
1.8K
47K
1000P
R31 15K
R33
4.3K
C49
2.2u50
+
1.8K
R35
R43 47K
R227
22K
7
4
6
5
R53
22
R55
22
C29 10u50
+
C27
1000P
C73 0.01
C74 1000P
0.22
R85 39K
R86
1.8K
R83
R84 47K
R228
22K
R81 10K
R88
R87
C43
R82
3.3K
C41
2.2u50
+
8
5
6
7
1
2
3
4
8.2K
C45 0.27
C44
C46
22
R90
22
R91
+
22u50
C47
1000P
C75 0.01
C76
1000P
0.047
1000P
C78
C77 0.01
C30
10u50
+
4
2
3
1
7
6
5
8
+
2.2u50
C50
4.3K
R34
C28
22
R54
22
R56
R32 15K
22K
R226
R44 47K
R36
1.8K
R48 47K
1000P
C88 5600P
C87 5600P
C107 100P
C108 100P
C84 10u50
+
C86 1u50
+
C83 10u50
+
C85 1u50
+
R123 62K
R124 62K
C104 0.1
C96 0.018
C94 0.022
C93 0.022
C95 0.018
C91 0.1
C89 0.1
C90 0.1
C92 0.1
C98 2.2u50
+
C97 2.2u50
+
R133 1K
R134 1K
R127
2.7K
R125
5.6K
R126
5.6K
R128
2.7K
C111
+
C112 100P
C113 100P
R135 1K
R136 1K
+
4.7u50
R137 1K
C122 100P
R138 1K
C123 100P
W11
1K
4.7u35
+
W17 4.7u50
+
C55
0.01
R201
10K
100K
R202
R203
2.2K
R204
47K
C56 1u50
+
R119
100 2W
R120 100 2W
4700P
C67
C68
4700P
C155 220u16
+
W9
R93
C121
C124
33u16
+
+15V
4.7K
R205
10K
R208
R206
10K
2.4K
R201
R204
470
10K
R238
47u25
C147
+
R207
5.1K
2
3
1
5
6
4
7
R257
1 1W
0.01
C144
0.01
C143
C145
1000u50
+
47
R258
5.1K
R223
470 2W
100
R253
100
R261
1K
R224
1000P
C138
1W
C141
0.01
C142
0.01
1000u50
C151
+
R236
1
2
3
4
5
6
7
8
9
10
12
11
47u25
C150
+
+
47u25
C156
1
2
3
4
5
6
7
8
C165 0.01
C159 0.01
C157 0.01
2.7K
R212
10u50
C158
+
390P
C146
10u50
C139
+
470
R202
1000P
C137
4.7u35
C152
+
10K
R225
8
+15V
+25V
+25V
+25V
+25V
+15V
+15V
+25V
+15V
+B
+14V
+14V
-46V
F. OFF
GND
-15V
F2
+15V
F1
POWER
GND
GND
+25V
+18V
7
8
5
6
3
4
1
2
F2
T800MAL
250V
T800MAL
250V
CN11 CN12
CN13 CN14
F3
CN6
F1
CN5
C186
6800P
W100
1
2
WH6
WH7
C182
0.01
C181
0.01
C183
0.01
0.01
C184
0.01
C185
(T,E) : AC230V~ 50Hz
T2.5A L 250V
C105 10P
C106 10P
47P
C20
C18 100P
C19
C17 100P
47P
C31 100P
100P
C21 100P
100P
+
22u16
2.4K
2.4K
R49
+
C39
22u16
C32
C23
47K
R47
R94 330
C22 100P
100P
+
C40
22u16
C24
C37
R70
R69
C48
2.4K
R50
1
2
3
4
5
6
5
4
7
C8
1000P
100K
R1
100P
C3
C5
100P
1u50
C1
+
3
2
8
1
C7
0.01
R3
330
22K
R5
330
R4
100P
C6
100P
C4
100K
R2
+
1u50
C2
22K
R6
GND
Rch
GND
Lch
GND
R7
C9
100P
6
5
8
7
1u50
C11
+
39K
R10
R13
1000P
C13
C12
100P
R1
1
7.5K
100P
C10
22
R12
2
3
4
1
R9 22K
R8 22K
1
2
3
4
5
GND
GND
GND
+15V
-15V
4
MIXEDSW
5
GND
3
GND
2
1
SWOUT
GND
+15V
+15V
+15V
+15V
7.5K
R200
2.4K
R243
5.1K
R242
R241
1 1/4W
1 1/4W
1/4W
13
+14V
R240
470 2W
22
+15V
C114
4.7u50
+15V
+5.6V
+
+5.6V
+15V
+15V
+15V
+5.6V
-30V
+15V
+15V
-15V
+15V
1/4W
R181 1.5K
2.2K
R182
0.01
C51
C52 10u25
R185 2.2K
R184
4.3K
10K
R183
8.2K
8.2K
R89
510
15V
15V
15V
15V
15V
15V
30V
30V
46V
46V
B
15V
15V
32V
32V
15V
15V
15V
15V
15V
15V
1000P
1000P
B
+B
E1
E2
CN2
J1
PHONES
ELECTRIC
VOLUME
CONTROL
TONE
(L,R,SW)
IC5(1/2)
Q11
PHONES AMP
MUTE
Q12
IC5(2/2)
Q1
IC11(1/2)
100Hz HPF
AMP
-10dB ATT
FLch
Q2
IC1(2/2)
IC11(2/2)
FRch
IC2(1/2)
Q7
Q5
IC2(2/2)
Cch
SWch
Q8
IC3(1/2)
IC3(2/2)
100Hz LPF
IC4(1/2)
IC4(2/2)
Q6
SRch
D2
D1
D14
D15
Q19
E8
P1
E5
E7
E6
D13
HP MUTE
DRIVE
SLch
B
D26
Q6
Q7
D53
D51
D22
D21
Q4
15V AVR
ON/OFF
POWER
D50
D23
D24
Q8
Q18
D28
D27
D31
D34
-15V AVR
IC11
(2/2)
(1/2)
IC11
CN18
E2
E1
WH1
J6
J6
CN1
Q6,7
Q8,18
Q4
IC11
: UN4212 or DTC124ESA
: 2SB1370(E,F) or 2SB1375
: 2SD1894 2
: NJM4558D
D27
D21-24,31,34
(X11- )
D50,51
D49
D28
D26,53
: RD8.2ES(B2) or HZS8.2N(B2)
: RD5.1JS(B2) or HZS5.1S(B2)
: RD2.7ES(B2) or HZS2.7N(B2)
: 1SS131 or HSS104A
: S5688B or 1SR139-400
IC1
(1/2)
WH1
E9
IC1
(2/2)
BUFFER
ADD
(1/2)
IC1
IC2
(1/2)
IC2
(2/2)
CN3
CN1
CN2
L+R
1
2
3
IC1,2 : NJM4565D-D
D52
D49
: MTZJ10(B) or UZ-10BSB
D52
: RD6.2ES(B2) or HZS6.2N(B2)
Q15
D16
-10dB ATT DRIVER
(E TYPE)
(T TYPE)
GND LINE
SIGNAL LINE
B LINE
B LINE
(X08- ) (B/2)
IC7
(X11- ) (C/5)
(X11- ) (D/5)
(E/5)
(X11- ) (B/5)
C-V301/V351 (3/4)
(X13-7562-70)
SUB UNIT
CONTROL UNIT
(X11- )
4.3V
4.9V
4.7V
4.3V
5.0V
5.0V
4.3V
4.7V
4.9V
4.3V
5.1V
5.0V
4.4V
5.1V
4.7V
4.9V
5.2V
-10.4V
4.8V
14.8V
-11.0V
0V
0V
-11.0V
-14.4V
15.3V
15.3V
0.6V
-15.4V
-15.4V
15.3V
0.6V
0.6V
0.6V
-15.4V
15.3V
0.6V
16.5V
-15.4V
0.6V
15.3V
-15.4V
25.8V
-15.9V
15.4V
14.6V
0V
-18.3V
16.9V
15.4V
5.2V
0V
-27.7V
0V
5.2V
4.6V
5.1V
10.4V
-15.9V
15.0V
-15.0V
15.0V
-15.0V
MUTE ON: 2.0V
MUTE OFF: -9.3V
LESS THAN -10dB
(ATT ON) : 1.1V
MORE THAN -9dB
(ATT OFF) : -2.0V
3.2V
3.9V
3.9V
C-V301/V351
Y05-3952-70
CAUTION: For continued safety, replace safety critical components only with manufacturer's rec-
ommended parts (refer to parts list).
indicates safety critical components. For continued protec-
tion against risk of fire, replace only with same type and rating fuse(s). To reduce the risk of elec-
tric shock, leakage-current or resistance measurements shall be carried out (exposed parts are
acceptably insulated from the supply circuit) before the appliance is returned to the customer.
The DC voltage is an actual reading measured with a high impedance type volt-
meter with no signal input. The measurement value may vary depending on the
measuring instruments used or on the product.
2SC2003
2SC2878
2SC3246
DTC124ESA
2SA1048
2SC2458
UN5119
2SA1576A
2SA1586
2SC4116
2SB1370
2SD2061
UN4212
2SA1309A
2SC3311A
2SB1375
2SC4081
2SD1757K
NJM4558D
NJM4565D-D
NJM2279D
TC9215AP
TA8409S
TDA7309
SAA6579
NJM4580D-D
TDA7466
2SK302
LA1836
LC72131
LA2786
NJU7311AL
NJU7312AL
LV1016
