Shorted TVS diode (P4SMAJ20A) in Acer AO531h

Discussion in 'General Electronics Chat' started by rldator, Jul 9, 2015.

  1. rldator

    Thread Starter New Member

    Jun 1, 2015
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    If I remove the VS diode will the laptop power-up and boot?
     
  2. DickCappels

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    Aug 21, 2008
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    Maybe, if the rest of the circuit is ok and no damaging transients are generated.
     
  3. rldator

    Thread Starter New Member

    Jun 1, 2015
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    Thanks for your reply.
     
  4. dl324

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    Mar 30, 2015
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    If the TVS is part of the charging circuit, it's might be okay to operate on battery power.
     
  5. rldator

    Thread Starter New Member

    Jun 1, 2015
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    Mr. dl324, Attach is the charging circuit "PD11" . How about if i will the power adapter as the power source coz my battery is defective and not accepting charge anymore.
     
  6. DickCappels

    Moderator

    Aug 21, 2008
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    I can see some Zener diodes as the closest thing to a TVS diode. Which one did/will/would you remove?

    Why are you thinking of removing it? (Is it shorted?)
     
  7. dl324

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    The TVS is intended to prevent overvoltage from the adapter connected to the laptop. If you're certain the adapter won't introduce any transients that could damage downstream circuitry; go for it...

    Breakdown voltage for the TVS in question is 22.2 to 24.6V.
     
  8. rldator

    Thread Starter New Member

    Jun 1, 2015
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    MR. DICKCAPPELS, I intend to remove the Zener diode mark "PD11 (P4SMAJ20A)". It is shorted I want to replace it but I cannot find a store here in the Phils that selli TVS diode. Any suggestion if there is a replacement similar to that.
     
    Last edited: Jul 11, 2015
  9. rldator

    Thread Starter New Member

    Jun 1, 2015
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    Mr. dl324, I will use HP adapter which is 18.5 V, 3.5 A, 65 W output as my source for this acer laptop.
     
  10. dl324

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    Mar 30, 2015
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    Some laptop supplies are unregulated or have a higher output voltage than specified. Make sure your adapter is actually 18.5V.
     
  11. rldator

    Thread Starter New Member

    Jun 1, 2015
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    I will make it certain that it is in 18.5 V and check it before I connect it to laptop. Thanks for your help! I will inform you to what happen next time.
     
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