teclast f7 sizzling

teclast f7 sizzling

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Viewing 15 posts - 1 through 15 (of 18 total)
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  • #141468
    Enver Can
    Participant
    • Posts: 4

    hi, while the Teclast f7 is full of charge and the charger is attached, the sound comes from the laptop. is this normal?

    (Sound from the left of the touchpad)

    #141520
    Chris G
    Keymaster
    • Posts: 2673

    Yes, I mentioned this in my review as a con, the speakers emit a hissing noise when it’s plugged in at 100% and charging. It’s some type of interference.

    Chris | Admin
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    #141537
    andimu
    Participant
    • Posts: 3

    I don´t think the noise comes from the speakes. To me the R22 inductors (3 on the board in total) seem to be the problem.

    I´m not completely sure but when you google for coil whine, you will find some references to the R22 inductors.

    #141543
    Chris G
    Keymaster
    • Posts: 2673

    Okay the speakers are up to the top there also to me it sounds like them, but you are right it could be coil whine. To me it’s very minor, so a minor annoyance. Don’t think we can fix it.

    Chris | Admin
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    #141554
    sportnok
    Participant
    • Posts: 149

    Its not the speakers, as has been said its on the main board, I think its 2r2, basically a magnet wrapped with wire that will vibrate given certain circumstances, one suggestion was to put some varnish on the coil to stop movement causing the noise, no idea if you can even get to the coil, but Chris might have an urge to pull things apart :-)..

    #141567
    Chris G
    Keymaster
    • Posts: 2673

    A new mod to do, when i had mine open I can’t say I saw this at all.

    Chris | Admin
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    #141581
    sportnok
    Participant
    • Posts: 149

    A new mod to do, when i had mine open I can’t say I saw this at all.

    I guess it would just be some anonymous part you otherwise wouldn’t notice, some have 2r2 wrtten on them, chances are you won’t be able to do anything without damaging something else as they look pretty small, but you never know.

    #141601
    andimu
    Participant
    • Posts: 3

    I think the noise comes from one of these parts:

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    #141610
    Chris G
    Keymaster
    • Posts: 2673

    Okay, so if I do open it up I will check them see if adding some varnish to them will do the trick!

    Chris | Admin
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    #141626
    Enver Can
    Participant
    • Posts: 4

    Thanks for the replies,

    If it does not problem the notebook in the future, it will not be a problem for me.

    #141683
    sportnok
    Participant
    • Posts: 149

    I think the varnish needs to be applied to the coil, but you may well find you won’t be able to get to them as its all concealed, think its a bit of a longshot..

    #141858
    Chupa
    Participant
    • Posts: 880

    how about a 1 mm thick spongy silicone pad between the copper and the coils?

    easy install, easy remove, should muffle them also transfers heat to the copper

    Need Help?
    1981 soldered my first Sinclair computer 1K, tapedeck * 1984 build and sold IBM clones 8Mhz, 512K, 20MB HDD * 2018 messing with ultrabooks

    #141869
    Chris G
    Keymaster
    • Posts: 2673

    Could do it, but got no reason to open my F7, well only to try fix that noise. But to be honest, doesn’t bother me enough to go digging around in there to fix it!

    Chris | Admin
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    Currently testing: LG G8X & Redmi K30

    #141997
    Chupa
    Participant
    • Posts: 880

    well an easier way is, go to you local china store and pick up a sizzling pan fridge magnet and put it next to the notebook. problem solved with a smile.

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    Need Help?
    1981 soldered my first Sinclair computer 1K, tapedeck * 1984 build and sold IBM clones 8Mhz, 512K, 20MB HDD * 2018 messing with ultrabooks

    #150734
    Michi
    Participant
    • Posts: 2

    hello, whats now the best solution for the whining parts?

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