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Tascam DR-07 SD card audio recorder

Discussion in 'Electronic Repair' started by N_Cook, Feb 21, 2013.

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  1. N_Cook

    N_Cook Guest

    A bag of bits to deal with , someone thought epoxying a SM switch back onto
    the pcb was enough and then could not reassemble the Chinese block puzzle. I
    managed to work out how to get the meshes back into the mic housings and the
    2-mic cross- yoke assembly back into the main body, despite never seeing the
    original disassembly sequence. As the usual incompetent "designer" , no
    point in replacing as "designed". This sw is only soldered at the usual SM 3
    miniscule pads to the pcb with no extra moulding around it to resist any
    excessive finger pressure.
    So come flat battery and nothing at switch on , the usual owner thought
    process is press the button harder.
    Oddly there is quite a bit of space to play with and a larger switch can go
    in there , mechanically decoupled from the pcb via 3 wires of course, but
    I'm wondering what sort of fixing. 2 screws through the body to properly
    anchor some mount behind a bigger more conventional stemmed click switch ?
     
  2. N_Cook

    N_Cook Guest

    I forgot the important point, these switches are soldered side-on to the
    board not large face to the board , so a turning moment of half-width times
    finger pressure to break the solder
     
  3. N_Cook

    N_Cook Guest

    Orange silicon dimple cut from inside a scrapped R/C zapper , with the
    conductive pad cut away, seated in the casing hole and larger thru-pcb click
    switch mounted inside it, fixed to the case , not the pcb. Wired to the pcb
    pads, Looks better than the original , and beneficially now more recessed
    and hopefully will last longer than the original
     
  4. N_Cook

    N_Cook Guest

    A bit disconcerting on first powering up, not seeing how these operate
    normally.
    Needs 3 second hold down on the momentary sw or just a brief line on the LCD
    and brief flash of the backlight and peak LED.
    There will be thousands of these abandoned by owners , for anyone who finds
    one and is prepared to get inside and do a fairly simple repair,
     
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