Kenwood SW-303 Service Manual
GIFH KJ ML ONAC EBD
1
FLOP
FLIP-
AUTO RECOVERY
LATCH SW
3
2
VOL.DET.
OFFSET
DET.
4
5
MUTE
AC OFF
DET.
OVER LOAD VCC ON
6
7
RELAY
DRIVER
VCC
8
4
7
6
5
3
2
1
13
10
9
11
12
14
8
1M
R107
100P
C105
VEE
4
3
2
1
5
6
8
7
VCC
0.1
C129
5.6K
R109
100K
R108
8.2K
R110
R106
680
R104
100
0.1
C115
18K
R117C116
0.033
C111
0.056
C113
0.056
C110
0.056
C108
JUMP
R115
2.7K56K
R114
56K
R113
OPT
R112
R111 100
0.47u50
C112
+
24K
R121
4.7K
R118
100K(B)
VR102
60Hz
200Hz
ON OFF
4.7u50
C107
+
150K
R140
68
R124
2.2K
R131
0.1
C126
C125 220u16
+
R139 JUMP R125 2.2M
R126
220K
R127
1M
10K
R123
10K
R129
10K
R141
100K
R142
220u10
C127
+
0.022
C128
1K
R130
220P
C101
100P
C103
R102
1K
33
R120
6
5
4
3
2
1
6
5
4
3
2
1
100K(B)
VR101
R132
10K
R133
3.3K
R134
2.2K
10K
R135
R137
22K
2.2K
R136
6.8K
R138
0.02
C119
47u16
C118
+
33
R119
4.7u50
C102
+
4.7K
R712
2.2u50
C705
+
1K
R711
2.7K
R709
47K
R708
1u50
C704
+
10K
R710
33K
R707
22K
22K
R705
22u16
C703
+
240K
R70310u16
C702
56K
R704
33u16
C701
+
56K
R702
12K
R701
33
121
2
R713
0.022
C920
0.022
C919
0.022
C922
0.022
C921
8200u63
C903
+
0.1
C905C906
C904
0.1
+
8200u63
78
654321
R907
220
1000u35
C908
0.1
C910 C909
1000u35
C907
0.1
+
+
0.022
C924
0.022
C925
C923
0.022
0.022
C926
1
OUT
GND
32
IN
47u16
C915
+
0.02
C916
47u16
C912
+
47K
R906
68K
R905
F902
250V T 1A
F903
250V T 1A
2
1
250V T 3A
F901
0.01
C901
0.01
C902
AC120V
12
OFFON
Q701,702
R105 47K
C131 47u16
+
C130 47u16
+
R101 330K
4.7u50
C117
+
R116
4.7K
100P
C114
R143 330K
0.022
C121
C120 47u16
+
1M
R128
0.022
C913
22K
R901
4.7u50
C917
+
8.2K
R902
1/4W
21
43
+
250V T 1.6A
F901
0.01
C901
0.01
C902
21
ON OFF
1
2
1
2
3
250V T 1.6A
F904
AC110-120V/
10K
R526
R528
75K
SW101
GND
1
OUT IN
23
1W
FR505
47 1/4W
220 1W
220-240V~
60Hz
330
R5292PC525
R517
75K
+
C521
220u63
47 1/4W
FR503
C511
220P
12K
R511
56
R509
56
R513
22P
C513
1K
R515
+
C515
220u10
C505
100P
C507
100P
R505
1.8K
+
C537
10u50
10K
R539
10u50
C509
+
OPT
C535
10K
R561
82
R557
4.7K
R556
220u63
C517
+
4.7u50
C501
+
2.2K
R501
22K
R503
C503
0.01
FR507
47 1/4W
47 1/4W
FR559
330 1/4W
FR513
5K
VR501
15K
R519R541
7.5K
+
C523
1u50
2.2 1/4W
FR511
2.2 1/4W
FR509
0.22
R523
0.22
R521
5W 5W
0.1
C531
4.7
R525
1W
R706
T901
JK101
IC701
IC102
IC101
IC901
IC902
SW-32HT(K) REVISED
(K,P) TYPE
(Y) TYPE
RELAY
DRIVE
SW101
CROSSOVER
CROSSOVER
FILTER SW
D101
ZD101
RB101
CN502
Q103
Q102
Q101
LD101
D102
D103
D701
Q702
Q701
RL501
D702
CN501 RB501
BD901
P501
D906
D901
LINE
INPUT
Q901
CN902
CN903
SW901
POWER SW
SP-WOOFER
VOLUME
STANDBY
LED
LIMIT
IC101 : TL074
IC102 : NJM4558D
IC701 : UPC1237HA
D702,901-904,906 : IN4001
D905 : IN4002
Q101-103,503,505,513,525,702
: 2SC945
Q529,531 : 2SA970GR
Q521 : 2SA1943(R)
Q701 : 2SA733
D905
CN901
RL901
D902
D904
D903
TA79015S
TA7815S:IC901
IC902 :
Q901 2SC2001:
1N4148:
D101-103,505,507,701,704
:ZD101 RD8.2ES(B)
BD901 : KBU60D
CN903
POWER SW
SW901
CN904
CN902
SW902
SIGNAL LINE
D704
Q529 Q531 Q509
Q503 Q505
Q501A
Q501B
Q515
Q519
Q513
Q521
Q517
ZD507
ZD503
Q525
ZD501
D505
D507
Q511
Q519 2SC5200(R):
Q517 2SA940:
Q515 2SC2073:
Q511 2SC2911S:
Q509 2SA1209S:
Q501A,B 2SC2240GR:
ZD501 : RD23ES(B)
ZD503 : RD5.6ES(B)
ZD507 : RD10ES(B)
DRIVER
BIAS
POWER
(BOTTOM VIEW)
0V
-14.7V
0V
0V
0V
0V
0V
14.9V
0V
0V
5.1V
6.2V
6.2V
14.9V
0V
6.0V
6.5V
1.4V
0V
2.0V
0.3V
0.3V
0.7V
0V
15.0V
0.9V
1.1V
0.8V
2.3V
22.8V
15.0V
0V
-23.8V
-15.0V
0V
46.3V
0V
46.3
0V
0V
0V
46.3V
0V
0V
0V
3.5V
-46.3V
-0.6V
0V
0.0V
-0.7V
-1.3V
1
2
3
4
5
6
CAUTION: For continued safety, replace safety
critical components only with manufacturer's recommended parts (refer to parts list). indicates
safety critical components. For continued protection against risk of fire, replace only with same type
and rating fuse(s). 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.
The DC voltage is an actual reading measured
with a high impedance type voltmeter with no signal input. The measurement value may vary
depending on the measuring instruments used or
on the product.
7
SW-303/32HT/SW-35HT
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