Kenwood KAC-8404 Service Manual page 8

A
KAC-8404
1
(X09-8740-10)
2
J1
B
R L
A
R L
3
R- -RED
SP
4 J2
LEVEL IN
CAUTION : For contin-
ued safety, re place safe-
ty critical com po nents
only with manufacturer's
rec om mend ed parts (re-
fer to parts list).
5
Indicates safety critical
com po nents. To reduce
the risk of electric shock,
leakage-cur rent or re-
sis tance mea sure ments
shall be carried out (ex-
posed parts are ac cept-
ably in su lat ed from the
supply cir cuit) be fore the
ap pli ance is returned to
the customer.
6
• DC voltages are as
measured with a high
impedance volt me-
ter. Val ues may vary
slight ly due to vari a-
tions between in di-
vid u al in stru ments or/
and units.
7
8
X09-8740-10 (1/2)
B
IC1-4 : BA4560RF
IC5 : TL494IDR
Q1,2 : DTA114EUA
Q3,4 : 2SC4097
Q5,6 : 2SA1577
Q7-10 : STP60NF06FP
Q11 : 2SD2012-F
Q12 : 2SB1375-F
Q301,302,401,402
: 2SC3419(Y)-F
Q303,304,403,404
: 2SC1845-A(F,E)
Q305,306,405,406
: 2SA992-A(F,E)
R201 C203
1K 10u50
+
TP110
TP101
TP102
R202 C204
1K 10u50
TP201
+
TP202
TP120
TP111
TP100
R127
TP210
100K
AL+
R129
100K
AL-
TP113
R130
TP114
100K
AR-
R128
100K
AR+
TP112
TP212
R228
100K
BR+
R230
100K
BR-
TP214
R229
TP213
100K
BL-
R227
100K
BL+
TP211
R101 C103
1K 10u50
+
R102 C104
1K 10u50
+
C
D1
D2-4,301,302,401,402,
703,705-707,713
Q307,308,407,408
: 2SC1627A-F D5,101,201,711,712
Q309,310,409,410
: 2SA817A-F D6
Q311,312,411,412 D7
: 2SC4468NF
D8,9
Q313,314,413,414 D102,202,303,304,403,
: 2SA1695NF 404
Q701 : 2SB1241 D103,203
Q702-704,706,708 D701
: 2SC4081 D702
Q705,707 : 2SA1576A(R,S) D704
D708,709
D710
+15V
IC3
TP203
(1/2)
TP207
R205
3 8
R211
1
2
4.7K
10K
R209 12K
R213
10K
R214
R210 10K
12K
R212
6
R206
10K
7
4.7K
5
4
IC3
TP204
TP208
(2/2)
15V
ISO
C123
10u50
21
+
C125
10u50
23
+
C126
10u50
24
+
C124
D711
10u50
22
+
R722
D713
2.2K
TP721
D712
Q707
C224
10u50
R723
12
TP722
+
100K
C226
10u50
14
+
C225
10u50
13
+
C223
10u50
11
+
+15V
IC1
TP103
(2/2)
TP107
R105
5 8
R111
7
6
4.7K
10K
R109 12K R113
10K
R100
1K
C100
1000P
R110 R114
12K
10K
R112
2
R106
10K
1
4.7K
3
TP108
4
IC1
TP104
(1/2)
ISO
15V
D E
: RM4ZLF-J4NF
: 1SS355
+15.0V
: LM1MA142WK-G
: FCH10A20
: FRH10A20
: UDZS16B
: LM1MA142WA-G
: UMZ6.8N
: UDZS6.8B
: UDZS15B
: UDZS10B
-15.0V
: B30-1770-05
: B30-1743-05
IC4
(1/2)
C217
3 8
47u25
1
2
+
R217 10K
C211 100P
C212 100P
R218 10K
C218
6
47u25
7
7
5
+
4
IC4
(2/2)
R725
4.7K
AUTO
Q708
P-CON DRV
D701
IC2
(2/2)
C117
5 8
47u25
7
6 5
+
R117 10K
C111 100P
C112 100P
R118 10K
C118
2
47u25
1
3 4
+
IC2
4
(1/2)
8 7 6 5 4 3 2 1
CN1 CN33
X08-A/2-
A
1/2
CN11
+15V
15V
TP303
32
31
TP301
Q301
34
TP305
33
TP306
36
35
Q302
TP302
38
37
TP304
47
48
Q401
45
46
43
44
Q402
41
42
1 2 3 4 5 6
X08-B/2-
B
CN3