J
I
H
G
F
1
2
3
4
5
6
7
0V
0V
0V
0V
0V
0V
0.9V
0.26V
-33.8V
0.26V
-34.5V
-33.8V
0.8V
0.1V
-33.8V
-34.5V
0.2V
-33.8V
-1.26V
1.12V
-1.26V
-0.58
0.55V
34.5V
1.13V
34.5V
0V
-1.26V
-34.8V
-0.66V
0V
0V
2.3V
17.0V
1.19V
-0.54V
-1.23V
1.17V
34.5V
0V
0.55V
-0.62V
-34.8V
34.5V
0V
-4.2V
17.0V
18.1V
34.5V
0V
0.21V
0.75V
0V
0V
0V
0V
14.5V
15.3V
5.4V
15.2V
0V
5.4V
15.2V
3.38V
0V
0V
-1.23V
-34.8V
2.35V
3.8V
0.1V
0.63V
0V
15.3V
0.57V
0.57V
15.1V
3.8V
1.75V
5.1V
0V
-33.8V
-1.26V
Q37
Q36
D28
D32
D33
Q19
D9
D10
Q22
D31
D35
D11
D17
D16
Q1
Q2
Q7
Q3
Q5
Q8
Q35
Q6
Q4
D18
D29
D30
Q9
Q10
D8
D37
D39
D41
Q29
Q23
Q41
Q24
Q25
Q26
Q11
Q31
Q13
J1
BATT
GND
P-CON
D34
D25
D26
Q18
Q17
D15
D13
D14
Q38
Q39
E3
D19
D7
SP OUT
Q32
Q14
Q12
Q30
Rch
Lch
D36
Q40
Switching regulator
Muting
transistor
Differential amp.
-compensating
For temperature
Power amp
Power switching
P-con
detector
stage
Power
A-class
muting
P-con
detector
Power
switch
DC protection
Overvoltage
protection
driver
Muting
DC/DC converter
ADJ
IDLE
ADJ
IDLE
F1(25A)
4
7
8
6
5
3
2
1
13
10
9
11
12
14
15
16
REFERENCE REGULA
T
O
R
OSCILLA
T
O
R
1000P
R53
1.2K
R54 1.2K
C37
0.1
3.3K
R56
30K
R57
C42
0.1u50
+
6.8K
R73
16K
R68
680
TH1
27K
R64
2.2K
R65
R66
10K
+
R69
4.7K
+
680K
R62
R60 10K
R67
C40
10u50
C41
R63 2.7K
R61 27K
1u50
C39
8
4
7
2
9
3
HP/NORMAL/LP
C14
22u16
+
C13
+
22u16
R52
3.3K
3.3K
R25
3.3K
R24
C54
220u16
C48
+
R81 82K
C51 1800P
R80 82K
2200P
22u35
C50
+
1.5K
R22
1.5K
R23
C80
22u16
+
+
22u16
C79
2.2u50
C49
+
7.5K
R78
C61
100P
R82
820
820
R84
100
R90
4700P
C60
100P
C62
56
3.9K
R86
7.5K
R79
+
22u35
C53
820
R85
R91
100
C59
4700P
10P
C58
22u35
C56
+
3.3K
R94
R96
82K
R89
7.5K
R87
R161
47K
C57
6P
C55
22u35
+
R93
56
R92
R51
150K
R95 3.3K
R97 3.3K
3K
R101
3K
R100
VR2 470
VR3 470
1000P
C63
C64
1000P
R88
82K
R104
100
100P
C74
100P
C72
C73
100P
100P
C71
R106
100
100
R107
R105
100
R179
10K
R180
22K
R115
0.1 2W
R109
220 1/2W
R175 3K
R171
1K
220
1/2W
R108
0.1
2W
R114
0.1
R112
0.1
R113
TP1
C68
0.047
R128
10
R164 100K
R163 100K
C67
0.047
C81
4700P
R177 3K
C83
4700P
10
R127
L1
3300u
16
+
C45
100u
50
+
C85
330
R98
91
R99
1/2W
R70 2.7K
R71 3.6K
10
R77
+
470u35
C43
ERROR
AMP
R167 4.7K
C77 10u
+
R168
4.7K
390
R124
390
R123
R125
1.5K
R126
1.5K
3.3K
R55
T1
10 1/2W
R122
C46
2200u35
2200u35
C47
+
+
47u16
C75
+
R166 5.6K
C70
1000P
16
R103
1K
2W
R72 470 1W
R76
470 1W
820
R83
R102
1K
2W
2
1
3.3K
+
C100 0.1u50
IC4
Q1,2
Q3-8
Q9,10
Q11-14
Q17,18
Q19
Q29-32
Q35
Q36
Q37
Q38,39
Q40
VR3
3)
IC4
KAC-6201
S2
R173
1K
R172
1K
R174
1K
D38
D40
R178 3K
C84
4700P
R176 3K
C82
4700P
D42
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 acceptably insulated from the supply circuit) before the appliance
is returned to the customer.
• DC voltages are as measured with a high impedance voltmeter. Values
may vary slightly due to variations between individual instruments or/and
units.
