Kenwood KAC-6401, Service Manual

Page: 5 / 10

O N M L K
1
2
3
4
5
6
7
0.5V 0.1V 3.8V 2.5V 0V 3.8V
14.3V
5.0V
14.3V
14.3V
0V
5.0V 5.0V
IC5
KAC-6401
D30
D42
Q47
Q46
D34
D37
D35
D36
Q49
Q48
D40
D33
Q52
J1
SP OUT
D41
D44
D39
Q51
Q57
D38
Q50
D43
Q56
P. CON.
DETECTION
POWER
SWITCH
MUTE
ON/OFF
MUTE
DRIVER
SWITCHING
STAGE
POWER
OVER-CURRENT
PROTECTION
OVER-VOLTAGE
PROTECTION
SWITCHING
DRIVER
SWITCHING
REGULATOR
IC1,2 : NJM2060M
IC3,4 : NJM4565MD
IC5 : UPC494GS
Q1-4,13-17,58-61 : 2SC945(A)(Q,P)
Q5-12,49,56,57 : 2SA733(A)(Q,P)
Q18-21 : 2SC4137(V,W)
Q22,25,26,29,46,48,52,53
: 2SC2412K
Q23,24,27,28,62,63 : 2SA1037K
Q30,33,34,37,54
: 2SC1627A
Q31,32,35,36,47,55 : 2SA817A
Q38,41,42,45
: 2SC4511
∗
B
Q39,40,43,44 : 2SA1725
∗
B
Q50,51 : FKV550T
∗
B
D1-8,10,12,15-28,30,
33,35,36,38-40,43,44,
49-60
: 1SS133
D9,11,42 : RD16JS(B)
D13,14 : RD8. 2JS(B)
D29 : RD7. 5JS(B)
D31 : FMU22S
∗
A
D32 : FMU22R
∗
A
D34 : B30-1460-05
D37 : RD10JS(B)
D41 : 1N5406-M
D45-48 : RD5. 1JS(B)
GND LINE
SIGNAL LINE
B LINE
B LINE
E1
D59
Q62 Q63
3.3K
R241
3.3K R201
3.3K
R240
10u16
C115
+
3
.3K
3
.3K
33K
R202
1.8K
R203
1.2K R209 1.2K R210
47u10
C100
+
100
R207 4.7K
R211
2.2K
R206
1K
R205
47K
R208
16 15 14 13 12 11 10 9
1
2 3 4 5 6 7 8
OSCILLATOR
REGULATOR
REFERENCE
AMP
ERROR
27K
R214
2.7K
R216
10K TH1
2K
R217
27K
R215
1000P
C108
1u50 C101
+
680K R213
6.8K
R234
16K
R235
1000P
C110
10K
R223
100u25
C112
+
680
R238
6.8K
R239
10u16
+
C111
100u10
C109
+
22K
R218
10K
R221
L+(A)
F1(25A)
L+(B)
L-(B)
L-(A)
R+(B)
R+(A)
R-(B)
R-(A)
BATT
GND
P-CON
10
R227
0.047
C103
10
R228
0.047
C102
0.047
C105
10
R230
0.047
C104
10
R229
10u16
C114
+
C113
3300u16
+
L2
W403
1.5K
R237
4.7K
R220
10
R232
150
R225
W402
4.7K
R219
R231
10
R224
150
1.5K
R236
L1
10
R204
2200P
C99
1/2W
Q50,51
Q56,57
+B
+B
+B
+B
+B
+B
+B
B
+B
(F52-0014-05)
+B
+B +B
+B
+B
+B
B
+B
+B
+B
+B
+B +B
+B
100u6.3
C124
+
R254
5.6K
47K
R253
47K
R252
47K
R250
R251
47K
+B
+B
+B
2SA733(A)
2SA817A
2SC1627A
2SC945(A)
B
C
E
2SC2412K
2SC4137
B
E C
2SA1725]B
2SC4511]B
2SA1037K
NJM4565MD
UPC494GS
NJM2060M
CAUTION : For continued safety, replace
safety critical components only with
manufacturer's recommended parts (re-
fer to parts list).
Indicates safety critical components.
To reduce the risk of electric shock, leak-
age-current or resistance measurements
shall be carried out (exposed parts are
acceptably insulated from the supply cir-
cuit) 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.