JVC KSAX-7700 Schematic
KS-AX7700
SCHEMATIC DIAGRAMS
POWER AMPLIFIER
KS-AX7700
CD-ROM No.SML200303
Contents
Block diagrams
Standard schematic diagrams
Printed circuit boards
2-1
2-2
2-8~9
COPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LTD.
Area Suffix
J Northern America
No.49809SCH
2003/03
KS-AX7700
Safety precaution
!
Burrs formed during molding may be left over on some parts of the chassis. Therefore,
pay attention to such burrs in the case of preforming repair of this system.
Block diagram
KS-AX7700
R-OUT
AMP
POWER
SW101A
LPF
1
U105
2
1
U104
2
HPF
-A
-A
Q142-Q146
6
OFF
VR102C
VR102A
L-OUT
Q148,Q149
Q152
Q161-Q166
SW101B
LPF
7
U105
6
7
U104
6
50-250Hz 12dB/OCT VARIABLE
1
3
U103
-A
7
5
U103
7
HPF
-B
-B
-B
Q242-Q246
Q248,Q249
OFF
VR102D
VR102B
Q252
Q261-Q266
Q150
Q250
PROTECT
MUTE
CONTROL
+/-15V
Q780
T1
U703
TRANS
& REGULATOR
Q730,Q731
POWER
Q745-Q747
REGULATOR
POWER
CONTROL
Q272
Q171-Q176
VCC
VEE
U704
Q755-Q757
VR701
U701
-708
Q705
2 2
1
U106
-A
3
VR103A
1
BOOST 0-12dB CROSSOVER
U102
-A
3
VARIABLE/INV.CIRCUIT(Gain1)/Amplifier
INPUT
AMP
VR101B
7
U101
-A
31
R-IN
1 1
1
U206
-A
3
VR103B
7
U102
-B
6
VR101A
6
U101
-B
57
L-IN
HI-INPUT
L
R
DE
board
CCFL
LOAD
INVERTER
CCFL+12V
Q790
F01,F02
INPUT
POWER
F
D.C.
+12V
Q701
Q702
REM
G
2-1
KS-AX7700
4
3
5
2
K
L
F
H
Standard schematic diagrams
Amp section
BOOST 0-12dB(45Hz) VARIABLE
CROSSOVER(50-250Hz 12dB/OCT VARIABLE)
5
2
3
6
5
U104-B
NJM2068LD
1
4
U104-A
NJM2068LD
7
4
SUB-2
VR102DR216
50KC15K
C112
C111C110
2.2/50V
473(M)473(M)
R118
VR102CR116
50KC15K
R218
15K
15K
2
3
U105-A
NJM2068LD
6
5
NJM2068LD
C211C210
473(M)473(M)
U105-B
2.2/50V
4
R130
22K
4
C213
C345
470/16V
1
C113
2.2/50V
C212
2.2/50V
7
FLAT
R230 R2
22K 22
R131
22K
C11
2.2/
M
2
R113
10K
1
R213
10K
3
R115
10K
C109
47P
R114
10K
2
1
3
4
U103-A
NJM2068LD
45
R215
10K
C209
47P
R214
10K
6
7
5
4
U103-B
NJM2068LD
VR102A
50KC
VR102B
50KC
R217
R117
10K
988
10K
C121
104P
R-IN
RCA01A
SY-SW0406-82
4
CHDW1140-N
+
R
-
C162
102P
C262
102P
-
L
3
+
L-IN
RCA01B
SY-SW0406-82
R260
22KF
2
C163
102P
R101
22K
R160
22KF
C263
102P
R201
22K
C101
4.7/50V
C102
4.7/50V
C161
4.7/50V
C160
4.7/50V
C260
4.7/50V
4.7/50V
C201
C202
4.7/50V
R102
22KF
R103
22KF
C104R105
22P56KF
R188
150KF
R166
150KF
R266
150KF
R288C261
150KF4.7/50V
R202
22KF
R203
22KF
R205 C204
56KF 22P
C105
100P
C205
100P
C122
104P
3
2
U101-A
NJM2068LD
8
R106
56KF
C106
22P
U101-B
NJM2068LD
8
5
6
R206
C206
22P
56KF
R108
1
7
C107
470P
R208
1K
7
6
C207
470P
C123
104P
VR101B
20KB
1K
C125
4.7/50V
R109
1K
9
VR101A
20KB
R209
1K
R211
SUB-1
3
R134
20KB
VR103A
C115
224(M)
C116
183(M)
1K
R140
680K
C216
183(M)
R240
680K
R135
1K
R235
1K
224(M)
U106-A
NJM2068LD
3
2
R136
1K
R139
5.6K
5
6
U106-B
NJM2068LD
U206-A
NJM2068LD
R236
1K
C215
U206-B
NJM2068LD
3
2
R239
5.6K
5
6
8
C117
8
8
R237
20K
8
C217
R137
20K
1
47P
R138
330K
7
1
47P
R238
330K
7
2
1
U102-A
8
NJM2068LD
3
1
2
1K
R112
30KF
C108
33P
R111R110
11KF15K
45
C124
104P
C208
24P
R212
56KF
R210C225
15KF4.7/50V
12K
6
5
U102-B
NJM2068LD
R234
7
4
VR103B
20KB
1
2-2
A
BOOST 0-12dB(45Hz) VARIABLE
CROSSOVER(50-250Hz 12dB/OCT VARIABLE)
BC
D
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