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Thread: Tascam 788, Pushbuttons intermittent, Any way to "clean"

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    Tascam 788, Pushbuttons intermittent, Any way to "clean"

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    The title basically says it all.

    My faithful Tascam 788 has a couple of buttons that have become intermittent, specifically the TRACK button.

    Is there any way to clean or recondition this, or is it on its way out?

    Thanks in advance.

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    Bumping up after a few years.
    The buttons are getting worse.

    Any ideas on how to recondition these?

    If Tascam reissued the 788, or offered a Portastudio with MIDI, I'd be first in line to buy one.

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    Quote Originally Posted by ejm View Post
    Bumping up after a few years.
    The buttons are getting worse.

    Any ideas on how to recondition these?

    If Tascam reissued the 788, or offered a Portastudio with MIDI, I'd be first in line to buy one.

    deoxit does it

    one to clean
    another type to keep them going - called gold but that is just the name nothing to do with real gold

    Home - CAIG

    https://caig.com/deoxit-d-series/

    https://caig.com/deoxit-d-series/
    DeoxIT Gold G5S-6 Spray Contact Conditioner and Protectant - 5 oz.

    try also ace hardware walmart and amazon

    i thought i had links to radio shack selling it to but they disappeared
    use google to find vendors if you dont like those choices above

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    mr average: Thanks for the reply.
    A couple of questions.

    1) Have you actually done it, or something similar?

    2) Did you disassemble the device?
    I have not opend up my 788 yet, but have a feeling that the button section is "buried".
    To get to it may require a major tear apart, which I am reluctant to do, since I may not get it working again. ;>))

    I don't know if they are mechanical, or some kind of "membrane" type (for lack of a better term).

    I have turned the internet inside out, and there is nothing on this problem with Tascam products or anything related.

    Anybody got any ideas/tips?

    What I'm thinking of doing is:
    1) Do not disassemble the unit.
    2) Lightly spray some contact cleaner/lubricant safe for plastics around the top of the switch/button, hoping that it seeps down inside. Work the switch/button several times.
    3) Follow that up with some Caig Deoxit D100. I looked at the Caig website, and this seemed to be the type most applicable.
    4) Pray.

    Ant better ideas?

    Thanks in advance.

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    Quote Originally Posted by ejm View Post
    mr average: Thanks for the reply.
    A couple of questions.

    1) Have you actually done it, or something similar?

    2) Did you disassemble the device?
    I have not opend up my 788 yet, but have a feeling that the button section is "buried".
    To get to it may require a major tear apart, which I am reluctant to do, since I may not get it working again. ;>))

    I don't know if they are mechanical, or some kind of "membrane" type (for lack of a better term).

    I have turned the internet inside out, and there is nothing on this problem with Tascam products or anything related.

    Anybody got any ideas/tips?

    What I'm thinking of doing is:
    1) Do not disassemble the unit.
    2) Lightly spray some contact cleaner/lubricant safe for plastics around the top of the switch/button, hoping that it seeps down inside. Work the switch/button several times.
    3) Follow that up with some Caig Deoxit D100. I looked at the Caig website, and this seemed to be the type most applicable.
    4) Pray.

    Ant better ideas?

    Thanks in advance.

    yes
    and it worked great
    did not have the gold follow up back then but have not needed it before the gear wore out from real old age

    i did not have to take apart as i could reach the pots with the nozzle and spray into a hole in the side of the pot
    maybe on the other one i pulled the cover off to reach the pots

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    mr average: "i did not have to take apart as i could reach the pots......."

    The pots for the input trims are not the problem.
    It's the many "buttons" for track select, send, eq, track cue, record, etc.

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    Quote Originally Posted by ejm View Post
    mr average: "i did not have to take apart as i could reach the pots......."

    The pots for the input trims are not the problem.
    It's the many "buttons" for track select, send, eq, track cue, record, etc.
    then you may have to pull off the case
    that should not be a major problem to do

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    mr average: So did you clean the buttons, or did you clean the four input trim pots?

    "then you may have to pull off the case
    that should not be a major problem to do"

    I saw a video on YT of a guy replacing a switch for the FFW or STOP or REWIND or similar on a 2488.
    If the 788 is anything like that, IMO it IS a major thing to do.

    Also: ".....before the gear wore out from real old age"
    What gear?
    This is a digital recorder/portastudio.

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    Quote Originally Posted by ejm View Post
    mr average: So did you clean the buttons, or did you clean the four input trim pots?

    "then you may have to pull off the case
    that should not be a major problem to do"

    I saw a video on YT of a guy replacing a switch for the FFW or STOP or REWIND or similar on a 2488.
    If the 788 is anything like that, IMO it IS a major thing to do.

    Also: ".....before the gear wore out from real old age"
    What gear?
    This is a digital recorder/portastudio.
    on my devices only the pots were a problem
    so that is all i cleaned

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    Tactile switches are cheap and they do fail and get dirty. These are not a candidate for Deoxit as it does not fix everything. The correct way to address this is to take note of the size and lead types of the switch and then go looking on the Mouser site or the Digi-Key site for compatible switches. I have a couple of hundred in stock of different ones- there are in line lead switches and then 4 leg switches. When you replace them and I did that as far as back in the 80's at Teac the deck works much better. New fresh tactile switches are not that hard to replace. Take note of the problem ones and change away. This is the way a professional does it. I have a Teac V900X that would eject very intermittently. many times it would ignore you. This leads to higher pressure and damage to the keyboard.
    Once I put in a row of fresh tact switches the eject seemed to anticipate my command and the eject opened very easy like it was suppose to.
    Spraying a chemical in a small switch requires that you get to that switch and if you are that close then why not just change it out? The spray will not last long anyway a new switch will.
    Best regards,
    Skywave Tape Deck Repair, Chicago area

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