Tascam 122 Mk II - Power won’t stay on

Discussion in 'TASCAM Analog Forum' started by ShiaBernstein, Apr 25, 2021.

  1. ShiaBernstein

    ShiaBernstein New Member

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    Gear:
    122 MkII
    One of my 122 mk II units will only stay on if the power switch is held in the pressed position. Any leads on where to look to start the repair would be appreciated
  2. SkywaveTDR

    SkywaveTDR Well-Known Member

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    Teac, Tascam, Sony
    Sounds like a defective switch. Maybe some Deoxit would help. I have yet to see that defect and I work on a lot of 122 decks- all versions.
  3. ShiaBernstein

    ShiaBernstein New Member

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    From the limits of what I can diagnose: it seems that the ‘latching’ internal part of the switch is not engaging.
    I see the following part number: SDL1P-TV3.
    I found this tech doc: https://www.handsontec.com/dataspecs/switches/sddl-tv3-sw.pdf
    Is there any serviceable part in that switch or should I attempt to replace it?
  4. SkywaveTDR

    SkywaveTDR Well-Known Member

    Joined:
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    From:
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    Gear:
    Teac, Tascam, Sony
    A lot of Power switches in them days were TV switches and the number usually was for the current they would allow. If the mounting is correct change it. Tascam should maybe have the part but I have never seen one fail so far. Maybe the latch part is with old grease on it so some Deoxit would clean it up. I have had to change some TV-5 or 7 switches in older open reel decks. Maybe one or two.