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SX-DW303
SCHEMATIC DIAGRAMS
POWERED SUBWOOFER
SX-DW303
CD-ROM No.SML200210
US ------------- Singapore
Area Suffix
Contents
Block diagram
Standard schematic diagram
Printed circuit boards
COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.
2-1
2-3
2-4
No.21174SCH
Oct. 2002
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SX-DW303
In regard with component parts appearing on the silk-screen pr inted side (par ts side) of
the PWB diagrams, the parts that are printed over with black such as the resistor ( ),
diode ( ) and ICP ( ) or identified by the " " mark nearby are critical for safety.
(This regulation does not correspond to J and C version.)
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Block diagram
SX-DW303
SPEAKER
CN503
OUT
Y502
R
Q5006
POWER AMP
IC 506
IC 505
Q5007
CN861
CN102
MUTE
Q5706
LED
IC 571
REGULATOR
B+
INDICATOR
RED GREEN
Q5902
Q5903
CN502
Q5904
Q5905
CN504
IC 503
IC 502
IC 501
VR502
Carrier Freq.
IC 504
VR501
Off set
CN951
MAINS
PLUG
CN901
POWER
TRANS
T9501
B+
W9001~4
W9001~4
IC 951
POWER-SUPPLY
CIRCUIT
IN
CN505
VOLUME
CN151
PHASE SW
NORMAL-- REVERSE
ON -- CANCEL
AUTO POWER ON / STANDBY SW
W1001
L.P FILTER /
AMP
IC 102
PHASE / A.H.B
IC 103
IC 103 1/2
IC 101
CN501
CN101
FREQUENCY
VOLUME
IC 101
IN PUT L / H AMP
VARIABLE-- FIX
MUTE
CUT OFF FILTER SW
IC 104
LED CONT.
IC 104
AUTO POWER ON
IN PUT L / H AMP
& H.P FILTER
INPUT
(LOW-LEVEL)
MONO
L /
INPUT
(HIGH-LEVEL)
OUTPUT
(SPEAKER-OUT)
2-1
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SX-DW303
< MEMO >
2-2
Page 5
Standard schematic diagram
5
4
SX-DW303
3
2
1
Parts are safety assurance parts.
When replacing those parts make
PRE MAIN signal
ABC D FG
E
sure to use the specified.
2-3
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Printed circuit boards
SX-DW303
SX-DW303
Regulator board
Amplifier board
Terminal board
5
C1036
VR101
4
R1001
C1003
C1037
R5032
R5033
C5015
IC591
C1004
R1002
R1011
C1025
C5007
Q5004
C5916
D5905
R1007
R5027
D5002
R5038
C1010
C1039
R1009
C1026
R5031
R5036
C5014
C1038
R1071
R5024
D5001
R1070
C1028
R1006
C5009
R5026
C5002
R5025
R5039
R1003
R1004
C1032
C5008
D5004
C1001
C1002
J1001
K1001
R1010
R1008
3
J1002
R1069
2
1
IC592
TP501 VR501 VR502
D5906
C5914
C5913
R5035
C5010
R5029
R5030
R5037
C5915
Q5003
R5006
D5003
S1001
R1033
Q1005
R1017
R1049
C1033
R1062
C5011
C1019
C1027
R5023
R5028
R1016
C1035
R1032
R1020
C1009
IC504
C1014
R1021
R1012
R1066
W1001
R1034
C1006
C1030
IC502
CN504
CN101
R1022
C1031
C1034
C1015
R1013
Q5002
R1019
C1017
IC101
C1007
R1053
CN501
C5013
B5101
C1018
C1011
R1014
R1064
C1016
R1060
IC503
R1030
R1059
C5006
R1031
R1025
Q1003
R1061
R5021
R1005
C1008
R1015
R1054
C5012
C1012
C1005
D1001
R5016
R5019
C5005
R1067
IC104
Q1007
R5014
R5034
IC103
R5007
R1023
R5018
Q1006
R5013
Q5001
D1003
D1002
IC102
R5009
R5015
R5011
C1021 C1022
R1044
R5008
R5003
R5017
C1023
IC501
R5020
R5010
R1040
R1050
C1020
R1038
C1013
R1047
Q1004
R1056
R1052
R1039
R1041
R1036
Q1002
R1048
R1057
R1055
R1051
R5022
R5012
R5004
R1035
R1028
R1046
Q1001
C1024
C1029
C5004
R5005
C5003
R1065
R1037
C5001
R5002
R5001
CN103
R1068
D5704
D5707
R5723
TH501
R5715
R5714
CN502
R5713
R5719
D5709
D5706
C5909
C5910
R5721 R5722
Q5707
Q5708
Q5709
R5717
Q5713
R5720
C1501
VR151
D5904
C5703
Q5710
R5718
Q5711
C5705
R1501
D5903
Q5905
Q5903
R5045
C5016
R5745
R5749
CN151
Q5902
Q5904
R5910
D5005
D5718
C5704
R5905
L5901
R5909
R5906
C5017
D5006
R5901
R5902
D5705
C1502
Q5005
C5025
R5042
Q5723
D5708
C5908
R5912
R5040
D5902
Q5712
D5716
R5046
R5041
R5050
R5725
R5911
R5049
D5710
D5711
IC505
Q5901
D5712
D5909
D5910
L5902
R5724
L5904
C5020
C5905
D5901
R5727
Q5714
C5907
L5903
C5911 C5912
D5907 D5908
R5043
R5054
R5051
C5906
R5728
D5713
R5726
C5706
R5730 R5731
B8102
R5729
Switch board
Q5721
R5044
Q5715
R5747
R5702
R5701
Q5716
S1501
C5019
D5008
Q5719
Q5717
Q5718
C5711
R5048
D5007
C5902
R5732
R5741
D5703
C5018
R5742
C5707
CN505
RY502
Q5706
C5903 C5904
R5056
R5748
C5022
C5901
R5055
R5052
D5717
C5702
R5053
IC506
C5021
TH594
TH593
C5024
K5002
TH592
TH591
IC571
K5001
L5001
C5026
R5716
R5746
C5023
D5010
R5733
B8103
C5709
Q5720
R5057
D5009
D5013
R5059
CN102
R5744
Q5006 Q5007
R5734
C5708
B8105
R5058
R5743
R5735
D5714
D5011
B8104
C5710
D5715
Q5722
C5918
R5736
R5740
B8109
C5917
D5012
R5737
B8108
R5738
B8107
CN503
R5739
B8106
W9004
W9002
W9004
CN901
W9002
EP951
CN952
HS953 HS952
T9501
C9515
D9506
D9504
R9506
D9505
Z9001 Z9002
R9002
Volume board
C9510
C9509
C9507 C9508
D9509 D9510
R9508
C9502
HS954
Q9504
C9501
C9005
S9001
IC951
C9003
C9004
C9001
Power switch board
C9511 C9512
W9003
TH901
LF902
C9504
D9507
R9518
Q9508
R9519
K9501
W9001
R9505
C9513
Q9510
C9506
R9503
C9505
W9003
D9001
R9516
R9524
R9527
D9501
W9001
LF901
R9517
R9510
R9529
R9528
D9503
C9514
D9511
R9501
R9502
R9520
R9504
C9503
D9502
C9002
R9526
R9525
EP952
R9521
R9522
Q9509
R9523
CN951
PC951
R9001
D9512
ABC D FG
2-4
E
H
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< MEMO >
SX-DW303
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SX-DW303
VICTOR COMPANY OF JAPAN, LIMITED
AUDIO & COMMUNICATION BUSINESS DIVISION
PERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan
No.21174SCH
Printed in Japan
200210
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