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National SG-990A High Quality Service Manual



  • High quality reproduction of original factory service manual
  • 8.74 Megapixels per page (A4 pages)
  • 40 pages
  • In Color
  • The manual is written in: English
  • Provided as downloadable PDF file


High quality reproduction of original factory service manual. The manual describes SG-990A AM/FM multiplex stereo radio-phono with stereo cassette tape recorder. The manual includes circuit diagrams, parts catalog, specification and more. Refer to table of contents for more information.

Table of Contents

  • Specifications

  • Parts Identification

  • Disassembly Instructions

    • To Remove Chassis

    • To Remove Cassette Tape Deck

    • To Remove Record Changer

    • To Remove Speaker

    • To Remove Baffle Board

  • Schematic Diagram

  • Alignment Instructions

    • AM – IF & FM Alignment

    • Alignment Points

    • FM – RF Alignment & FM Stereo Alignment

    • FM Stereo Alignment

  • Parts Identification (Printed Circuit Board)

  • Circuit Board Wiring View

  • Alignment Instructions (Tape Recorder)

  • Mechanical Adjustment – Tape Recorder

  • Tape Transport Operations

  • Parts Identification – Tape Deck

  • Dial Cord Stringing Guide

  • Tape Recorder Circuits

  • Trouble Shooting Guide

    • Defective Recording Circuit

    • Defective Playback Circuit

    • Defective Mechanism

  • Exploded View of Cassette Deck

  • Servicing the Record Changer

  • Record Changer Replacement Parts List

  • Cassette Tape Recorder Replacement Parts List

  • Replacement Parts List


This section of product description has not yet been edited.

This product was added to our catalog on Thursday 11 March, 2010.

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