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© 2002-11 PRINTED IN JAPAN
B53-0006-00 (N) 3379
POWER AMPLIFIER
KAC-5201
SERVICE MANUAL
15
LINE INPUT SIDE
SPEAKER OUTPUT SIDE
Accessory
(W01-1607-05)
Screw set
(N99-1587-05)
Fuse
(F52-0012-05)
Heat sink
(F01-1724-01)
Dressing panel
(A21-4265-02)


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KAC-5201
2
ADJUSTMENT
No.
ITEM
INPUT
OUTPUT
RECEIVER
ALIGNMENT
ALIGN
FIG.
SETTINGS
SETTINGS
SETTINGS
POINTS
FOR
Connect a cassette receiver or CD receiver.
Connect a DC
VR3 (L ch)
1
IDLE
-
voltmeter between
VOLUME : 0
VR4 (R ch)
5.5mV
(a)
CURRENT
CN3 and J3
(X09-)
(SP. OUT, L+/R-)
VR3 (L)
VR4 (R)
R
L
CN3
J3
DC voltmeter
5.5mV
(a)
DC voltmeter
5.5mV
(a)
SP. OUT
LR


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4
3
A
B
C
D
E
F
G
H
I
J
1
2
3
4
5
6
7
PC BOARD (FOIL SIDE VIEW)
W65
W39
E
C23
R131
R69
C25
C17
W5
E
R55
W3
W4
B
C39
C37
B
R95
R91
E
B
R97
B
R56
E
C16
R58
C41
W12
W14
B
R85
E
E
R93
B
W29
W23
R87
B
R79
E
W36
C19
R77
C15
R57
C14
R99
W7
R54
R53
B
E
R52
R50
W15
W13
W17
8
R51
1
C35
R75
R89
W24
W30
R63
R64
E
B
R67
C29
B
E
C55
R20
R22
R21
W1
VR1
R13
R14
R17
R16
R12
R11
R18
R122
B
E
R130
R120
R19
R45
R39
R49
5
R60
4
W19
R15
W9
W8
R2
R1
1
R41
4
C7
R43
W27
W28
W25
R59
C20
W72
W31
W73
R62
R61
R104
R103
7
8
R46
C34
R42
C8
R44
R40
R3
R10
C12
C11
C1
R9
C2
C5
C10
C9
C4
C3
R6
R5
1
14
C6
C33
R4
W22
R150
R7
R8
C60
R132
C26
R70
R78
R102
C38
C40
E
B
E
B
E
VR4
VR3
R81
R
L
R83
R82
R88
R84
B
E
B
R86
R94
W50
E
B
C36
R92
W67
B
E
E
L
1
2
R
W40
W46
B
W42
C27
8
C30
R68
C28
1
W64
W59
R80
W57
R90
R76
B
W62
W66
W61
W54
W52
C44
R100
R96
C42
R98
E
W71
B
E
B
R115
W55
W48
R72
C32
C31
R65
5
C21
W41
4
R66
C24
C22
W45
R71
R74
W56
W60
W58
W63
R101
W69
C43
R73
C51
R113
E
B
E
R114
C52
R112
R111
R119
W6
R128
R116
R124
E
W2
R118
R117
1
16
W34
C57
C59
R121
B
1
R31
4
R32
R126
R127
W10
C56
R125
R129
R123
C58
R105
W35
C53
W11
W16
8
W18
9
W33
W26
W21
W32
W37
W38
L2
W68
W70
C54
W51
R109
R110
W44
W43
R108
SG
W47
TH1
W49
R107
D
G
W53
DS
L1
4
1
4
1
POWER IN
D17
D15
LPF
OFF
ON
S2
Q20
ST
S1
MONO
D23
Q9
Q13
Q17
Q15
D19
D21
Q11
D11
Q3
D13
Q5
Q2
Q1
D35
Q26
D33
IC2
CN1
D3
D1
IC1
D2
D4
SPEAKER OUTPUT
Q14
D16
Q12
Q7
Q8
Q16
Q10
CN3
Q6
D22
D20
IC3
D18
Q4
Q18
D24
D14
D12
Q25
D9
D5
D8
D10
D6
Q23
D7
D31
D34
D28
D32
Q24
CN2
D29
D25
IC4
D26
D30
D27
Q22
Q21
E3
J3
RCA INPUT
R
E2
E1
L
J1
X09 B/3
J2
SPEAKER
LEVEL INPUT
X09 C/3
X09-5640-10 A/3
(J74-1546-01)
X09-5640-10
IC
Q
Address
15D
25C
34C
46F
15C
25C
36C
42C
54C
63C
74B
84B
95B
10
3B
11
5B
12
3B
13
6B
14
2B
15
5B
16
3B
17
6B
18
2B
20
6B
21
3F
22
4F
23
2D
24
6E
25
2E
26
6E
Refer to the schematic diagram for the values of resistors and capacitors.


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A
B
C
D
E
F
G
H
I
J
1
2
3
4
5
6
7
D1
D2
D4
D3
IC1(1/4)
ISOLATION AMP.
INPUT
SENSITIVITY
IC1(2/4)
S1
ST/L
MONO
IC2(1/2)
IC1(4/4)
IC1(3/4)
S2
Q20
LPF
OFF/ON
L.P.F.
IC2(2/2)
D11
D5
D13
D21
D19
Q3
Q7
Q9
Q13
Q15
Q11
Q5
Q1
IC3
(1/2)
ADJ.
IDLE
D9
D7
D15
D17
D16
D18
Q6
Q12
Q16
D20
D22
D6
D10
D8
Q4
Q8
Q10
Q14
D14
D12
Q2
IC3
(2/2)
ADJ.
IDLE
Lch 1
Rch 2
CN1
CN2
E2
J2
L
L
R
R
D25
D26
CN3
IDLE
ADJ.
Q17
D23
D24
Q18
D28
D27
Q22
Q21
DC/DC
CONVERTER
D29
D35
D33
Q24
Q26
D34
D32
D31
D30
Q23
Q25
J3
J3
F1(15A)
(F52-0012-05)
SP. OUT
IC1
: UPC4574C
IC2
: NJM4565D
IC3
: M5219P
IC4
: UPC494C
IRFIZ44N
Q1,2,5,6,17,18,20,23,24
2SC945(A)(Q,P)
Q3,4,25,26
: 2SA733(A)(Q,P)
Q7,8
: 2SC945(A)(Q)
Q9,10
: 2SC1627A
Q11,12
: 2SA817A
Q13,14
: 2SC5099LB
5(P)
Q15,16
: 2SA1907LB
5(P)
Q21,22
:
D1-4,11-24,27,28,31-33
: 1SS133
D5,6
: RD22JS(B)
D7-10
: RD8.2JS(B)
D25
: FMU22S
A
D26
: FMU22R
A
D29
: B30-1460-05
D30
: 1N5406-M
D34
: RD7.5JS(B)
D35
: RD10JS(B)
OSCILLATOR
J1
WH1
E1
WH2
GND LINE
SIGNAL LINE
3
2
1
C1
1500P
R1
820
R3
9.1K
R7
10K
10u16
C3
+
C5
22P
R5 3.9K
R9
2.2K
5
6
4
7
150
R15
R39
2.2K
5K(A)
VR1
1K
1000P
2.2K
R11
150
R17
56
R13
C60
R150
R14 56
R18
150
R12
2.2K
R4
9.1K
C2
1500P
13
12
14
R6 3.9K
R8
10K
C6
22P
10u16
C4
+
820
R2
150
R16
2.2K
R10
2.2K
R40
2.2K
R41
11
9
10
8
2.2K
R42
C7
22P
R43
36K
C8
22P
R44
36K
R45 36K
R46 36K
C9 2.2u50
+
2.2K
R31
R19 22K
+
C11 2.2u50
R21 22K
C12 2.2u50
+
R22 22K
R32 2.2K
C10 2.2u50
+
R20 22K
7
6
5
1K
R56
27K
R55
27K
R54
27K
R53
1.8K
R51
R52 4.7K
C14
C15
0.12
C16
0.022
R49 4.7K
R50 4.7K
8
47K
R58
22u16
C17
+
R57
15K
1
2
4
3
10K
R60
22u16
C20
+
R59
10K
47u25
C31
+
22K
R75
C21
330P
3.3K
R64
4.7K
R61
5
6
8
7
R65
47K
4.7K
R69
R67 47K
10u16
C23
+
C29 8P
C27 12P
47P
C25
100
R87
100P
C39
0.22
R93
750
R81
100u10
C35
+
1K
VR3
1K
R83
0.22
2W
R91
10K
R95
120
R77
100
R85
100P
C37
220
1/2W
R89
22u16
C33
+
470 2W
R73
R103
100K
R79 120
R71 620
100P
C40
120
R80
100
R88
2
3
4
1
C24
10u16 +
4.7K
R70
R66
47K
C22
330P
C28 12P
R68 47K
C30 8P
C26 47P
R63
3.3K
47u25
+
C32
C34
22u16
+
R104
47K
R72 620
R74
470 2W
22K
R76
R78 120
1K
VR4
1K
R84
220
1/2W
R90
R94 0.22
R96
10K
100P
C38
0.22
2W
R92
100
R86
100u10
C36
+
750
R82
4.7K
R62
2W
2W
1
2
3
4
4
3
2
1
4
3
1
2
4
3
2
1
4
3
1
2
2200u35
C52
+
2200u35
C51
+
C53
2700P
R105
10
1
2
7.5K
R99
270
R97
4.7u50
C41
+
R100 7.5K
4.7u50
+
C42
270
R98
56
R108
150
R110
56
R107
150
R109
L2
C55
47u35
+
100
R121
27K
R126
4.7K
R119
2.4K
R118
10K
R120
680K
R124
1u50
C56
+
2.7K
R117
128
27K
1.5K
R132
1.5K
R131
1.5K
R123
R122
33K
R116
4
7
8
6
5
3
2
1
13
10
9
11
12
14
15
16
OSCILLA
T
O
R
REFERENCE REGULA
T
O
R
ERROR
AMP
R129
1000P
1u50
C58
+
6.8K
R130
TH1
R127
4.7K
C59
10u16
+
R125
680
C54
2200u16
+
3.3K
R111
3.3K
R112
3.3K
R113
3.3K
R115
30K
R114
L1
1
2
3
4
1
2
3P CON
GND
Rch+
BATT
Rch-
Lch+
Lch-
10 1/2W
R102
0.047
C44
C43
0.047
R101
10 1/2W
22u16
C19
+
0.082
10K
16K
C57
IC4
AUDIO UNIT (X09-5640-10) (A/3)
KAC-5201
(X09-) (B/3)
RCA INPUT
(X09-) (C/3)
SPEAKER LEVEL INPUT
0V
0V
0.2V
17.1V
0V
17.1V
17.2V
0V
0V
0V
0.1V
-6.2V
0V
-1.2V
-30.2V
-29.6V
-0.6V
0.6V
0V
0V
0.8V
0V
0V
-6.2V
0V
0V
0V
-23.4V
30.2V
-30.2V
-29.6V
-1.2V
-1.2V
-30.8V
-0.6V
0V
0.6V
1.2V
3.6V
0V
30.8V
AC 31.2V
AC 31.2V
AC 31.2V
AC 31.2V
AC 31.2V
AC 31.2V
0V
14.4V
14.4V
0V
5.0V
5.0V
-6.2V
10.0V
0V
3.8V
1.7V
0.7V
3.7V
0.1V
2.5V
5.1V
5.1V
5.1V
0V
0.7V
-17.1V
0V
0.1V
3.6V
0V
1.2V
30.8V
0.1V
(14.4V)
(14.4V)
14.4V
14.4V
29.6V
0V
23.4V
-30.8V
9.9V
10.0V
0V
0V
0V
0V
0V
29.6V
30.2V
1.2V
30.8V
30.8V
1.2V
-1.2V
1.2V
0.8V
0.1V
0V
0V
0V
0V
0V
0V
0V
-0.2V
0V
0V
0V
-17.1V
0V
14.2V
14.2V
14.2V
5.0V
5.0V
14.4V
14.2V
13.6V
0V
-0.8V
0V
-30.8V
B LINE
B LINE
CAUTION : For continued safety, replace
safety critical components only with
manufacturer's recommended parts (refer
to parts list).
Indicates safety critical components. To
reduce the risk of electric shock, leakage-
current or resistance measurements shall
be carried out (exposed parts are accept-
ably insulated from the supply circuit) be-
fore the appliance is returned to the cus-
tomer.
· DC voltages are as measured with a high
impedance voltmeter. Values may vary
slightly due to variations between indi-
vidual instruments or/and units.
2SA733(A)
2SA817A
2SC1627A
2SC945(A)
B
C
E
NJM4565D
UPC4574C
UPC494C
M5219P


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KAC-5201
7
EXPLODED VIEW (UNIT)
A
B
1
2
3
J 2
VR1
S 1
J 1
LINE IN
OPERATION
FILTER
INPUT
SENSITIVITY
J 3
Ex2
Ex2
F
F
Kx7
Jx4
F
F
F
F
F
F
Bx4
Bx4
G
F
Dx2
Dx2
D
D
D
A
C
H
(X09-)
(A/3)
(X09)
(C/3)
(X09)
(B/3)
F1
3
12
5
4
2
18
18
23
21
701
716
727
727
727
(X09-)
(X09-)
S 2
(X09-)
(X09-)
WH1
(X09-)
(X09-)
(X09-)
A
B
C
D
E
F
G
H
J
K
L
4x8
2.6x10
FLAT WASHER
3x10(BLK)
3x6(BLK)
3x8
3x12
M4x8
4x12(TROX)
: N09-4026-05
: N09-4382-05
: N15-1040-46
: N80-3010-45
: N89-3006-45
: N89-3008-46
: N87-3012-46
: N09-4157-05
: N07-0002-08
: N09-4215-08
: N09-6032-05
WH2
(X09-)
G
L
L
Parts with exploded numbers larger than 700 are not supplied.