JVC RC-W305 Service Manual
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JVC RC-W305 Service Manual

JVC RC-W305 Service Manual

Radio cassette recorder
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SERVICE MANUAL
RADIO CASSETTE RECORDER
No service part is available for this model.
Based on One to One exchange policy.
Safety Precaution ........................................................................... 2
Preventing Static Electricity ........................................................... 3
Disassembly Method ...................................................................... 4
Adjustment Method......................................................................... 5
Description Of Major IC ................................................................ 8
Voltage Charts .............................................................................. 12
Wiring Connection Diagram ........................................................ 13
Schematic Diagram ...................................................................... 14
Printed Circuit Board ................................................................... 15
COPYRIGHT © 2005 JVC ASIA PTE LTD
RC-W305
SERVICE POLICY
Contents
No: 28223
SEP. 2005

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Summary of Contents for JVC RC-W305

  • Page 1: Table Of Contents

    Disassembly Method ..............4 Adjustment Method................. 5 Description Of Major IC ..............8 Voltage Charts ................12 Wiring Connection Diagram ............13 Schematic Diagram ..............14 Printed Circuit Board ..............15 COPYRIGHT © 2005 JVC ASIA PTE LTD No: 28223 SEP. 2005...

  • Page 2: Safety Precaution

    RC-W305 Safety Precautions XL-SV320SL/SV305GD XL-SV308BU 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 ti the original design unless authorised in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits.

  • Page 3: Preventing Static Electricity

    RC-W305 Preventing static electricity Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pcikup). Take care to prevent this when performing repairs. 1.1. Grounding to prevent damage by static electricity Static electricity in the work area can destroy the optical pickup in devicessuch.

  • Page 4: Disassembly Method

    RC-W305 Disassembly Method XL-SV320SL/SV305GD XL-SV308BU Remove the back cabinet 1, Open the battery cover and remove 2 screws inside it. (Screw A) Screw A 2, Remove 5 screws on back side. (Screw B) Screw B Then the unit would be disassembled.

  • Page 5: Adjustment Method

    RC-W305 Adjustment Method Instrument required Precautions for alignment 1 Direct connect to the IF sweeper output 1 Low frequency oscillator side and 1 UF and 22 Kohm connect to the This oscillator should have a capacity to output sweeper input side . Same as FIG1 .
  • Page 6 RC-W305 XL-SV320SL/SV305GD TUNER ADJUSTMENTS XL-SV308BU Use a plastic screw driver for adjustments. Adjust the intermediate frequency of AM and FM to the frequency of ceramic filter. Set of unit Supply voltage : DC 9.0V Speaker impedance :8 ohms Standard output...
  • Page 7 RC-W305 e. FM Adjustment Band switch : FM FM Dummy antenna : 75 ohms unbalance Adjusting Connection position of VTVM Step SG Frequency Adjustment Circuit Input Output tuning dial Oscilloscope Connect sweep Connect sweep generator to generator to IC101 10.7 MHz...

  • Page 8: Description Of Major Ic

    RC-W305 Description of Major IC XL-SV320SL/SV305GD XL-SV308BU LA1824 Block Diagram...
  • Page 9 RC-W305 BA3308 Block Diagram...
  • Page 10 RC-W305 XL-SV320SL/SV305GD XL-SV308BU BA3416BL Block Diagram...
  • Page 11 RC-W305...

  • Page 12: Voltage Charts

    RC-W305 Voltage Charts XL-SV320SL/SV305GD XL-SV308BU IC101 LA-1824 TUNER FM IC No. Item DC9V 0.04 1.31 3.04 4.37 4.37 0.00 4.37 0.10 2.84 1.30 1.30 0.17 4.37 3.65 3.66 1.22 1.22 1.26 Item DC9V 4.34 4.34 0.00 0.29 IC101 LA-1824 TUNER AM IC No.

  • Page 13: Wiring Connection Diagram

    RC-W305 Wiring Connections Diagram...

  • Page 14: Schematic Diagram

    RC-W305 Schematic Diagram XL-SV320SL/SV305GD XL-SV308BU...

  • Page 15: Printed Circuit Board

    RC-W305 Printed Circuit Board...
  • Page 16 RC-W305 XL-SV320SL/SV305GD XL-SV308BU...
  • Page 17 RC-W305...
  • Page 18 JVC Asia Pte Ltd 101 Thomson Road, #28-04 United Squares, Singapore 307591 (No: 28223) Printed in Singapore 200505(L)

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