Kenwood KAC-8401 Schematics
A B C D E
u
2
0
C
R244
R243
0
C
0
C
15K
100
+
+
+
KAC-8401
1
2
LINE
3
IN A
LINE
OUT
LINE
IN B
4
SPEAKER
INPUT
5
6
(X09-5610-10) (A/2)
R101
J1
L
R
L
R
L
R
1K
R202
J2
109
78
65
43
21
D101
C105
R329
C103
1K
10u16
+
10K
C101
R103
1200P
10K
C102
R104
1200P
R330
C104
10u16
1K
+
1K
1K
R102
D100
C106
D102
0.1
C53
R197
300
C55
470P
R297
C56
470P
300
15P
15P
15.8V
10K
R105
10K
R106
10
IC1(3/4)
C126
C226
5
6
R107
10K
R86
220
R108 10K
9
ISO
1000P
1000P
4
11
R196
R296
IC1
(2/4)
R111
C100
1000P
R100
1K
-15.8V
2.2K
2.2K
7
10K
C171
4700P
R112
10K
8
R109
10K
C250
22u16
+
R110
10K
82K
R113
C109 10u16
10
R115 82K
R116 82K
+++
C111 10u16
C112 10u16
4
8
R195C150
2.2K22u16
R295
2.2K
R194 2.2K
R294
2.2K
10K
R123
R124 10K
+
2
C113 15P
C114 15P
R114
C110
10u16
S1
13
12
82K
+
IC1(1/4)
3
2
R125
10K
C131
15P
ST/ MONO
C132 15P
R126 10K
IC1(4/4)
C115
1 10u16
+
C116
10u16
14
+
R127
R128
22K
22K
C33 0.01
C34 0.01
R129
R131
10K710K
0V
6
0V
5
IC7(2/4)
VR1
50K
0V
0V
R130
10K
3
2
R132
10K
IC7(1/4)
R133
1
10K
R137
2.2K
R138
2.2K
R134
R139
R135
10K
10K
3K
R140
C117
0.33
R136
10K
3K
C119
0.047
C118
0.33
0V
0V
0V
C120
IC2(3/4)
0V
0V
0.047
-15.8V
9
10
IC2(4/4)
12
13
R141
HPF
R142
16K
0V
2
3
IC2(1/4)
IC2(2/4)
5
6
16K
4
11
15.8V
LPF
C121
10u16
8
+
22K
R145
C123
10u16
14
+
22K
R143
C35 0.01
22K
R144
C36 0.01
C122
10u16
1
+
C124
10u16
7
+
R146
22K
S3
HPF/
OFF/
LPF
R199
R198
LPF
AB/A
C201
C202
R201
1200P
1200P
1K
C203
10u16
+
C204
10u16
+
C54
0.1
R203
R204
D202
D201
10K10K
R331
1K
R332
1K
D200
R121
R122
R222
R221
2.2K
2.2K
2.2K
2.2K
C205
R117 51K
R119 51K
R120 51K
R118 51K
R218 51K
R220 51K
R219 51K
R217 51K
15P
10K
R205
10K
R206
15P
C206
IC3
(2/4)
ISO
5
6
R207
10K
10
8
4
2
C210 10u16
C212 10u16
C211 10u16
C209 10u16
15.8V
4
7
R87
220
C200 1000P
R200 1K
9
10
IC3(3/4)
+
+
+
+
82K
R213
R209
10K
R215
R211
10K
C271
4700P
R212
10K
R208
10K
11
8
82K
-15.8V
R216
R210
10K
82K
R214
82K
R223 10K
10K
R224
C214 15P
C213 15P
13
12
IC3(1/4)
3
2
R225 10K
C231 15P
ST/MONO
S2
C232 15P
R226
10K
IC3(4/4)
C215
10u16
1
+
C216
10u16
14
+
R227
R228
22K
22K
C38
C37
0.01
0.01
S6
15.8V
C41 0.01
C43 0.01
R302
4.3K
R301
R303 4.3K 4.3K
R304 4.3K
0V
0V
0V
0V
R307
R308
15.8V
24K
24K
-15.8V
15.8V
IC4(1/4)
4
3
1
2
R305
4.3K
C301
100P
IC6(2/2)
6
5
8
C303
R309R310
0.22
BASS BOOST
C304
0.22
IC6
(1/2)
3
2
4
C302
100P
R306
4.3K
13
12
4
R229
10K
0V
7
C39
0.01
C305
300
2.2u50
C306
2.2u50
300
0V
1
C40
0.01
R230
14
IC5(4/4)
10K
9
IC4(4/4)
R241
R24216K
IC5(1/4)
IC5(2/4)
-15.8V
11
16K
11
1
8
1
14
C
10
1
+
7
1
R231
R233
R239
10K10K
10K
6
7
5
0V
IC4(2/4)
R235
IC4
(3/4)
3K
0V
C219
0.047
0V
10
LPF
0V
12
C217
0.33
0V
13
HPF
R313
1.1K
3.6K
R311R312
100K
R317
R314
3.6K
100K
R318
1.1K
B B.
ON/OFF
IC5(3/4)
0V
10
0V
9
R232
10K
8
S5
2.2K
R238
3K
R236
R234
10K 10K
R237
2.2K
C218
0.33
HPF
LPF
R240
R315
R316
C220
4.3K
4.3K
0.047
0V
0V
0V
0V
-15.8V
VR2
2
3
5
6
7
X09-5610-10 (1/3)
6
JIHGF
3
C7
30K
/
/
KA C-8401
R17133R321
2.7K
+
C163
10u35
82 82
R168 R167
Q108
C164
+
10u35
R172
2.7K 33
R271
2.7K
+
C263
10u35
82
R267
82
R268
Q208
+
C264
10u35
R272
2.7K
R169 2.7K
Q109
1.5K
R175
220
VR5
430
R173
C161
Q107
82P
R179
R180
100
C162
82P
430
R174
220
VR6
Q110
R322
R176
1.5K
R170
2.7K
R269 2.7K
R323 C267
33
Q209
1.5K
R275
220
VR7
430
R273
C261
82P
R279
R280
100
C262
82P
430
R274
220
VR8
Q210
R324
1.5K
R276
R270
2.7K
C165
100
C166
C265
100
D34
C266
1000P
Q29
D26
Q28
1000P
1000P
Q33
Q35
Q34
1000P
R177
100
D23
Q27
C169
Q30
100
R277
100
C269
Q36
R27833
100
47P
C170
D33
47P
C270
47P
47P
D35
C17
C19
D25
C20
C18
C23
C21
C24
C22
C167
47P
C168R178
47P
47P
C268
47P
Q111
470P
470P
470P470P
D24
Q211
470P
470P
470P
470P
D38
R181
R182
R281
R282
R282
220
220220
220
220
220
R183
4.7
R55
R57
R185
4.7
Q113
Q114
R186
R58
R56
R184
4.74.7
Q112
R283
4.7
R65
R67
R285
4.7
Q213
Q214
R286
4.7
R68
R66
R284
4.74.7
Q212
+
C4 1u50
1K
1K
Q115
R51
1.5K
R189 R187
R53
1.5K
Q117
0.1
2W
0.1
2W
R22
R23 30K
Q118
4.7
R54
1.5K
0.10.1
1K
2W2W
1K
R188 R190
R52
1.5K
Q116
Q215
R61
1.5K
0.1
1K
2W
R287
0.1
1K
2W
R289
R63
1.5K
Q217
Q218
R64
1.5K
0.1
1K
2W
R290
0.1
1K
2W
R288
R62
1.5K
Q216
C173
4700P
R149
470
R150
R199
R198
100
15K
470
VR3 10K
+
C128
10u16
C32
0.01
15.8V
4
0V
12
0V
14
13
IC7(4/4)
R148
15K
C130 47P
INVERTER
C307
10u16
+
-15.8V
C221
11
IC4(4/4)
R241
16K
8
C223
10u16
14
+
R243
10u16
+
R245
22K
C42
0.01
R319
S4
22K
R299
4700P
100
C273
VR4
R249
470
R250
470
-5.0V
14.7V
MUTE
MUTE
C31
MUTE
Q6
47u25
D29
D21
+
R151 C151
Q25
3.3K3.3K
R60 R59
Q26
R152 C152
R156
8.2K
22K
R26
+
C30
33u25
-15.8V
R255 8.2K
R251
3K
Q31
R69
3.3K
10u163K
10u163K
C15
C16
C251
10u16
+
C153 680P
C154 680P
+
+
22u25
+
22u25
+
C253 680P
R153 43K
R154 43K
15.8V
16V AVR
C13
22u25
C14
22u25
Q18
-16V AVR
Q201
R253 43K
R155
8.2K
Q101
R157
R158
+
+
R257
Q103
R161
C155
820 820
R162 C156
Q102
Q17
Q203
R261
C255
820
100
R159
R160
5600P
100 5600P
100
5600P
R259
D19
R44
3.9K
R42
1/2W
820
D22
820
C176
100P
1/2W
33
820
Q104
R41
33
R43
3.9K
D18
D27
D31
100P
C175
C26
-30.5V
R40
10
1/2W
100P
C275
+
220u50
R163
C157
C158
R164
R263
C257
47u25 1K
47u25
1K
1K
47u25
C159
R165
+
+
C259
R265
++
10P
43K
Q105
R166
C160
10P
43K
14.8V
Q106
43K
10P
Q205 Q207
HPF/OFF/LPF
D28
820
24216K
IC5(1/4)
IC5(2/4)
11
1
7
C224
10u16
+
C308
10u16
+
R244
C222
10u16
+
22K
22K 22K
R246
C44
0.01 0.01
C50
R320
22K
R298
15K
0V
R248
15K
C230
47P
0V
IC7(3/4)
10
9
11
-15.8V
R70
3.3K
MUTE
+
C228
10u16
8
Q32
R252
3K
C252
10u16
+
R256 8.2K
C254 680P
R258
R254 43K
820
Q202
R262 C256
R260
5600P
100
C276
100P
Q204
C258
R264
47u25
1K
Q206
+
R266
43K
C260
10P
X09-5610-10 (2/3)
7
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