Kenwood kac-6201 Service Manual page 7

F
QQ
3 7 63 1515 0
3)
34.5V
+
2.35V
R66
10K
0.63V
C40
1000P
D28
1.75V
R67
16K
15.3V
Q19 0.21V
0V
Q19
P-con
detector
D36
18.1V
Q22
TE
L 13942296513
S2
3
-4.2V
C79 R23
9 4 22u16 1.5K
+
0V
R25
HP/NORMAL/LP
3.3K
D17
Q1,2
2
8
Muting
transistor
7
0V
R24
3.3K
D16
R22 C80
1.5K 22u16
+
+
www
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.
G
IC4
5.1V
IC4
Switching regulator
1 ERROR 16
AMP
3.8V 2 15
Q37
Power
14
switch
0.1V 3
13
15.3V
4
Q37
12
5
11
R53
3.8V 6 15.1V
1.2K
10
14.5V
0V 7
0.57V
9 0.57V
8
R57
D33 D32
30K
0V
Q36
Q36
P-con detector
0V
R76
470 1W
C43
470u35
+
R98
D8
330
Muting
driver 1/2W
R95 3.3K
R97 3.3K
D18
17.0V
+
0.9V
0.26V
C49
2.2u50
+
Q5
Q3
-33.8V -33.8V
0V
Q1
+
0V
-1.26V
-33.8V
0V
Q2
Q8
0V
-33.8V
C50 R86 C58
22u35 3.9K 10P
+
-33.8V
Q6
0.1V
R88
82K
R78
0.8V 0.2V
Q4
7.5K
Q3-8
Differential amp.
x ao
y
i
H
8
Q17,18
0V
Power switching
D26
15.2V
DC/DC converter
Q18
R124
T1
390
5.4V
0V
D25
Q17
R123
15.2V
390
5.4V
0.75V
D7
0V
Q40
D34
Q40 Overvoltage
protection
+
0V
R72 470 1W
Q9,10
Q41
For temperature
-compensating
R99
1.12V
91
R105
100
-0.58
Q23
Q Q
3 6 7 1 3
Q9
-1.26V
VR3
0.26V
IDLE
ADJ
Q25
-34.5V
D41
R93
56
Q7
R107
100
17.0V
Q35
0V
2.3V
Q35
A-class
-1.26V
muting
R106
100
-34.5V
D42
Q26
-1.23V
IDLE
ADJ
Q24
-0.54V
+
Q10
R96 R104
100
3.3K
1.19V
u163
.
I
2 9 9 4 2 8
Q38,39
3.38V
DC protection
Q39
D13
Q38
+
0V
+
D14
R55
3.3K
Q11-14
Power amp
C71
C85
100P
100u
50
34.5V
34.5V
+
R179
1.13V
Q11
10K
R180
0.55V
Q29
22K
R171
0V
1K
1 5 0 5 8 2 9 9 4
Q29-32
Power
stage
R173
1K
0V
Q31
C68
-0.66V
0.047
TP1
Q13
2
1
-1.26V
-34.8V
C73
100P
C72
100P
-34.8V
Q14
-34.8V
-1.23V
Q32
-0.62V
R174
0V
1K
R172
1K 0V
0.55V
Q30
Q12
34.5V
34.5V
1.17V
C74
100P
m
co
J
9 9
1
0V
E3
2
C45
3300u
16
+
3
D15
BATT
GND
2 8 9 9
P-CON
4
Lch
C67 R127
0.047 10
SP OUT
Rch
R128
10
J1
5
6
KAC-6201
7