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Kenwood Manuals
Amplifier
KAC-PS621
Service manual
Kenwood KAC-PS621 Service Manual page 13
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F
CURRENT SIGNAL AMP
0.2V
IC9
IC9
R441
(2/2)
D309
(1/2)
1K
5
R333
7
4.7K
6
1
R332
R440 10K
1K
-15.0V
ATT DRV
Q263
D260
R269
2
330
Q143
43
56
R176
330
Q141
MUTE DRV
Q142
2
6
COMPARATOR
IC5
D308
62
R342
R344
4.7K
47K
Q342
Q344
R318
R337
R345
D342
D344
15K
10K
47K
D313
D314
Q341
D307
R319
R336
D341
100K
100K
D306
TP26
TP24
DATAH
1
5
9
2
6
10
13
3
7
11
RST
TP34
4
8
12
J3
H/U- AMP
G
15.0V
C309
0.01
8
3
R331
L5
47
2
4
C310
0.01
R189
D133
R182
1K
R187
10K
10K
R190 10K
Q144
R186
Q145
47K
R183
10K
R185 47K
R192 15K
R329
R354
4.7K
Q356
10
Q358
R355
10
Q357
R353
1.5K
Q355
C353
0.01
10K
11
14
Q310
10K
10K
Q307
R312
R316
R339
D304
1.5K
1.5K
10K
R317
R310
1.5K
6.8K
R314
R315
Q305
11K
6.8K
Q343
Q304
Q301
Q303
R338
C305
10K
R347
C343
100K
0.01
C313
0.01
TP35
H/U
COMMUNICATION
DATAC
H
15.0V
Q351
10K
10K
Q352
10K
10K
-15.0V
76
20
C142
0.01
R195
Q147
R196
10K
100K
R193
R194
Q146
22K
8.2K
R191
5.6K
C141
100u6.3
+
14.4V
Q354
FAN +B CONT.
10K
10K
Q353
10K
58
D312
R350
10K
10K
C349
Q97
10u35
VOLTAGE
LIMITER
10K
+
C350 10u35
+
Q349
10K
Q347
10K
10K
10K
Q313
10K
R349
10K
1.8K
D305
IC3
Q346
5
14V
TY
Q306
0V
6
RY
5V
7
Q302
SY
0V
8
VCC
14.2V
0.1
R304 4.3K
D302
R303 4.3K
TP23
D317
TP33
DATA
4
3
COMMUNICATION
2
1
J4
AMP- AMP
I
KAC-PS621/X621
+15V AVR
Q61
R67
820
Q81
Q63
C62
0.01
47.5V
W257
D68
Q62
D69
-47.5V
-15V AVR
5.0V
R479 10K
R480 10K
R450 1K
5
6
D315
R451 1K
8
R452 1K
9
Q348
R453 1K
10
11
12
18
13
14
4
0V
GND
3
TX
2
RX
1
SX
16
R443 2.7K
D301
R454 100
19
R455 100
20
R444 2.7K
5
11
9
8
10
7
6
REMOTE
X09-5770-10 A/2 (2/3)
J
L4
1
15
2
14
3
13
4
12
5
11
6
10
7
9
8
L6
1
15
2
14
3
13
4
12
5
11
6
10
7
9
8
5V SW
OUT DC DET.
Q149
0V
Q148
FTR
TRANS
1
TEMP4
2
TEMP5
0V
3
TEMP6
4
AVSS
5
LCE
6
LXREQS
5.0V
7
AVREF1
8
LDATAL
9
LDATAA
10
LCLK
11
LXDATAM
12
LXDATAS
13
LXCLK
14
LXBU
15
NC15
16
16
SDAAMP
17
NC17
18
18
SCLAMP
AUDIO
19
SCL
20
AUDIO
SDA
39
13
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