JVC KS AX4500P Service Manual
Circuit block diagram
KS-AX4500
R-OUT
FRONT
AMP
Q101~
LPF
U104
-A
OFF
Q111
HPF
5
U104
CROSS OVER
POWER
3
80Hz 12dB/OCT FIXED
L-OUT
-B
3
LPF
U106
-A
Q201~
Q211
OFF
HPF
5
U106
-B
Q100
Q200
MUTE
CONTROL
TRANS
Q80
T01
+/- 15V
VCC
PROTECT
VEE
Q112,Q212
Q113,Q213
Q312,Q412
MUTE
CONTROL
Q300
REAR
R-OUT
AMP
POWER
Q400
SW301A
LPF
OFF
U305
-A
3
Q301~
Q311
HPF
5
L-OUT
U305
-B
SW301B
LPF
OFF
U306
-A
3
Q401~
Q411
HPF
5
U306
-B
CROSS OVER
80Hz 12dB/OCT FIXED
U103
-A
3
BASS BOOST
50Hz 0~12dB VARIABLE
U102
-A
3
U101
-A
AMP
INPUT
5
R-IN
FRONT
VR102A
VR101A
L-IN
3
6
3
U105
-A
U102
-B
U101
-B
VR102B
VR101B
R
FRONT
HI-INPUT
U303
POWER
REGULATOR
Q40,Q41
Q45,Q46
Q55,Q56
-A
3
BASS BOOST
VR302A
3
U305
-A
VR302B
50Hz 0~12dB VARIABLE
U302
-A
AMP
INPUT
R-IN
REAR
3
5
U301
-A
VR301A
SV01
Q01
F01
INPUT
+12V
D.C.
U701
Q02
REM
Q05
R
REAR
HI-INPUT
~Q08
L
POWER
CONTROL
L
POWER
L-IN
6
3
U302
-B
U301
-B
VR301B
2-1
KS-AX4500
MEMO
2-2
Standard schematic diagrams
MAIN PCB [1/3] and SUB PCB circuit diagrams
7
Q01
A1023Y
R01
10/0.25W
L01
CL-310
UC400962
F01
20Ax2
KS-AX4500
P1
TM0006-00
C67
470/35V
C68
470/35V
R70
220/2W
C61
2.2/50V
C62
2.2/50V
R71
220/2W
L10
CL-1113
C80
22P
C09
104(M)
Q80
K117
C69
3300/35V
C70
3300/35V
D53
1N4744
D54
1N4744
C81
10/50V
CHASSIS
C73
473P
C74
473P
C03
105(M)
C63
220/16V
C64
220/16V
MUTE
+15V
C65
104P
C66
104P
-15V
VCC
R77
10K/0.5W
R78
10K/0.5W
VEE
CHASSIS
6
R90
10K
C93
104P
C91
104P
C92
104P
C15
104P
R15
130KF
R16
51KF
Q02
C3198GR
Q31
C3198GR
C01
10/16V
R35 1.2K
R36
51K
5
R37
R38
1.2K
10K
10111213141516
9
4
R17
4.7K
C17
47/16V
UC000242
C23
100/16V
R20
10K
Q06
A1266GR
R25
10
U01
TL494CN
234567
1
8
SV01
2K
3
R41
24KF
C40
102(M)"STYCON"
R18
4.7K
C16
334(M)
Q05
A1266GR
R19
10K
R39
68K
D05
1N4148
R26
1K
TH01
50KTH
C18
100/16V
C19
100/16V
R40
27K
2
Q08
A1268GR
R32
33K
Q07
C3198BL
C20
104P
R30
1K
R31
22K
C21
10/25V
1
R03
4.7K
C41
100/16V
R02
4.7K
SAM3270
R33
15K
C27
473P
C31
104(M)
LED01
R04
4.7K
D10
1N4148
Q40
A1266GR
R42
220/0.25W
R43
220/0.25W
Q41
A1266GR
D11
1N4148
C22
47/25V
R34
15K
R05
10K
Q32
C3198GR
R46
47
R45
47
G
R44
1K
R54
1K
G
R55
47
R56
47
PROTECTION
D
FQP50N06
S
D
S
G
Q55
FQP50N06
G
Parts are safety assurance parts.
When replacing those parts make
sure to use the specified one.
Q45
D
S
D
S
D02
1N4004
Q46
FQP50N06
Q56
FQP50N06
C11
2200/25V"RX"
C12
2200/25V"RX"
C13
104P
D01
1N5404
D31 FR154
D32 FR154
D34 FR154
D35 FR154
D70
1N4148
D71
1N4148
D51
YG225D2
UC000235
D52
YG225D2
UC000236
R80
220K
R81
10K
R82
2.2M
C24
103(M)
R47
10/2W
R57
10/2W
C25
103(M)
12T
6T
6T
12T
T01
37 PHI
R60
100/2W
C60
222(M)
Caution
If electricity is connected during disassembly, it must be a no load current. If it is load
current, be sure to attach a heat sink to the power-amp IC. This will be damaged if the
above precautions are not followed, as it does not have a sub heat sink attached to it.
BCDEFGH I JA
2-3
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