JVC SX-DW303 Service Manual
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JVC SX-DW303 Service Manual

JVC SX-DW303 Service Manual

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SERVICE MANUAL
POWERED SUBWOOFER
SX-DW303
Contents
Safety precautions
Disassembly method
Description of major ICs
COPYRIGHT
2002 VICTOR COMPANY OF JAPAN, LTD.
SX-DW303
Area Suffix
E --- Continental Europe
1- 2
1- 3
1- 6~7
No.21177
Oct. 2002

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Summary of Contents for JVC SX-DW303

  • Page 1 SX-DW303 SERVICE MANUAL POWERED SUBWOOFER SX-DW303 Area Suffix E --- Continental Europe Contents Safety precautions 1- 2 Disassembly method 1- 3 Description of major ICs 1- 6~7 No.21177 COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD. Oct. 2002...
  • Page 2 SX-DW303 1. This design of this product contains special hardware and many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services should be performed by qualified personnel only.

  • Page 3: Disassembly Method

    SX-DW303 Disassembly method Removing the amplifier assembly (See Fig. 1, 2) Remove the eleven screws A attaching the amplifier assembly. Remove the amplifier assembly to the front from the cabinet. Remove the connection of the wire connector at the back side of the amplifier assembly.

  • Page 4: Removing The Power Cord

    SX-DW303 Removing the power cord (See Fig.4, 5) Prior to performing the following procedures, remove the rear panel. Remove the two screw marked C attaching the bracket a. Pull out the bracket a toward you. Remove the connection of the wire connector...

  • Page 5: Removing The Bottom Plate

    SX-DW303 Removing the Bottom plate (See Fig.7, 8) Remove the three sheets of the cushion sheet marked G. Remove the six screws marked H attaching the bottom plate. Remove the two screws marked I attaching the bottom plate. Bottom Pull out the bottom plate toward you.

  • Page 6: Description Of Major Ics

    SX-DW303 Description of major ICs BA15218F (IC101, 102, 103, 104, 501) : Dual op. amp. 1. Pin layout / Block diagram OUT1 1 8 Vcc -IN1 2 7 OUT2 +IN1 3 6 -IN2 VEE 4 5 +IN2 BU4584BF (IC505) : CMOS 1.
  • Page 7 SX-DW303 TC74HC00AF (IC503) : CMOS 1. Pin layout / Block diagram TC74HC14AF (IC504, IC571) : CMOS 1. Pin layout / Block diagram NJM311M (IC502) : Comparator 1. Pin layout (TOP VIEW) +INPUT OUTPUT -INPUT BAL/STROBE...

  • Page 8: Parts List

    SX-DW303 PARTS LIST [ SX-DW303 ] * All printed circuit boards and its assemblies are not available as service parts. Area suffix E ----------- Continental Europe - Contents - 3- 2 Exploded view of general assembly and parts list (Block No.M1) 3- 5 Electrical parts list (Block No.01)
  • Page 9 SX-DW303...
  • Page 10 SX-DW303 Parts list (General assembly) Block No. M1MM Item Parts number Parts name Q'ty Description Area LV21341-001A SHIELD LV10709-002A COVER LV30225-044A SPACER LV30225-079A SPACER LV30225-0E4A SPACER LV30225-025A SPACER LV30225-0G8A SPACER QYSBSG3016E T.SCREW 2 PW-SHIELD QYSBSF3008Z SCREW 4 PW-COVER LV43179-002A BKT(SW)
  • Page 11 SX-DW303 Parts list (General assembly) Block No. M1MM Item Parts number Parts name Q'ty Description Area LV43202-001A FOOT LV33824-001A FOOT LV33824-002A FOOT DW3-ML02-01 SCREW DW3-TZ00-01 STAND WASHER PD3-DP00-01 DD3-DP00-01 WASHER DW3-ML02-01 SCREW DW3-JD00-01 FOOT SPACER LV33918-002A CABINET...
  • Page 12 SX-DW303 Electrical parts list (Main board) Block No. 01 Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area BK501 LV33818-001A BKT(FET) FOR FET C5014 NCS31HJ-681X C.CAPACITOR CN101 QGB2016K1-08 CONNECTOR TO PO AMP C5015 NCS31HJ-470X C.CAPACITOR...
  • Page 13 SX-DW303 Electrical parts list (Main board) Block No. 01 Item Remarks Item Remarks Parts number Parts name Area Parts number Parts name Area D5003 1SS133-T2 SI DIODE IC591 NJM78L05A-T D5004 1SS133-T2 SI DIODE IC592 NJM79L05A-T D5005 1SS133-T2 SI DIODE IC951...
  • Page 14 SX-DW303 Electrical parts list (Main board) Block No. 01 Item Remarks Item Remarks Parts number Parts name Area Parts number Parts name Area R1009 NRSA63J-154X MG RESISTOR R5013 NRSA63J-472X MG RESISTOR R1010 NRSA63J-154X MG RESISTOR R5014 NRSA63J-472X MG RESISTOR R1011...
  • Page 15 SX-DW303 Electrical parts list (Main board) Block No. 01 Item Remarks Item Remarks Parts number Parts name Area Parts number Parts name Area R5731 NRSA63J-103X MG RESISTOR W2001 QUB753-04A2A2 UL WIRE R5732 NRSA63J-103X MG RESISTOR W2002 QUB752-11A2A2 UL WIRE R5733...

  • Page 16: Packing Materials And Accessories Parts List

    SX-DW303 Packing materials and accessories parts list Block No. Block No. A1,A2,A3 Parts list (Packing) Block No. M3MM Item Description Parts number Parts name Q'ty Area QPA02503503P POLY BAG 1 FOR INST LV31492-026A CARTON LV33917-001A CARTON SHEET QPA02503503P POLY BAG...

  • Page 17: Schematic Diagrams

    SX-DW303 SCHEMATIC DIAGRAMS POWERED SUBWOOFER SX-DW303 CD-ROM No.SML200210 Area Suffix E --- Continental Europe Contents Block diagram Standard schematic diagram Printed circuit boards No.21177SCH COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD. Oct. 2002...
  • Page 18 SX-DW303 In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the parts that are printed over with black such as the resistor ( diode ( ) and ICP ( ) or identified by the "...

  • Page 19: Block Diagram

    SX-DW303 Block diagram...
  • Page 20 SX-DW303 < M E M O >...

  • Page 21: Standard Schematic Diagram

    SX-DW303 Standard schematic diagram Parts are safety assurance parts. When replacing those parts make sure to use the specified. PRE MAIN signal...

  • Page 22: Printed Circuit Boards

    SX-DW303 SX-DW303 Printed circuit boards Regulator board Amplifier board Terminal board CN505 Q5902 D5716 D5013 R5905 R5911 EP951 CN101 C5907 C9512 C9511 C5909 C5711 D1003 C9509 L5901 C5024 R5746 L5903 W1001 D1002 R9518 R9522 C9508 C9507 Q9508 Q9509 R1016 Q5905...
  • Page 23 SX-DW303 < M E M O >...
  • Page 24 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.21177SCH Printed in Japan 200210...

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