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Replacing DVD writers in DVD recorders

Discussion in 'Hobby Electronics' started by Franc Zabkar, Sep 23, 2008.

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  1. Franc Zabkar

    Franc Zabkar Guest

    I notice that some (many?) DVD recorders use DVD writers with fine
    pitch 40-pin flexible cables rather than the wider 40-pin IDE ribbon
    cables used in PCs. I haven't opened up any Panasonic DVDRs, but after
    studying various exploded diagrams, it appears that the IDE hard
    drives in these units have a small adapter PCB that converts the cable
    type from IDE to mini flex. Does this mean that the DVD writers in the
    same units are just PC-compatible IDE drives with a smaller but
    pin-compatible IDE connector? If so, is it possible to buy one of
    these IDE-to-mini-flex adapter boards at a reasonable price?

    - Franc Zabkar
  2. Mr.T

    Mr.T Guest

    *IF* (?) this is just the same as a 2.5" IDE HDD connector to 3.5" IDE HDD
    connector, then they are readily available at computer shops, Jaycar etc.

  3. Do you mean the ZIF type Flat Flex Ribbon like this?:

    1.8" hard drives like that used in the iPod use either (44 way) Flat
    Flex cables or a fine pitch round pin header.
    No doubt made their way into dvd burners designed for notebooks too,
    but I haven't opened any notebooks in a long time.
    eBay usually have plenty of these type of adapters, search for "hard
    drive adapter" or something similar.
    As usual, postage costs more than the product.

    Yes, DVD player/writers have been using PC based drives almost from
    day dot, to leverage the volume pricing.

  4. Franc Zabkar

    Franc Zabkar Guest

    The drives I'm thinking of have a separate power connector. The cable
    is 40-pin flat flex, not 44-pin.

    You appear to be thinking of this ...

    .... whereas I'm thinking of this:

    This is the same PCB, but the DVD writer is using the 40-pin ribbon
    version of the IDE interface instead of the 40-pin flat flex:

    Anyway I think I may have answered my own question.

    Here is the exploded diagram of a Panasonic DMR-EX77GN DVD recorder
    with HDD: VIEW.jpg

    These appear to be the relevant items:
    Item 30 FFC CABLE NPVWJ1982
    Item 10 PCB (ATAPI) NPVEP70194A
    Originally the DVD assemblies in DVD players were PC types. Nowadays
    they almost all have proprietary interfaces. The smarts are in the
    chipset, and the motor drivers are on the decoder PCB.

    Here is a typical reference circuit:

    Hard disc based DVD recorders are different in that the chipset must
    have an IDE interface to support the HD, hence the DVD writer is
    usually (?) an IDE type as well.

    - Franc Zabkar
  5. Franc Zabkar

    Franc Zabkar Guest

    Prime Electronics just quoted me AU$39.86 inc GST plus $11.00 freight
    for the PCB.


    - Franc Zabkar
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