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junglechris 30th October 2012 02:39 PM

Replacing blown TA2020
Hi guys! I'm new to this thing so my apologies if i post in tthe wrong bit.

My situation is this. Stupidly pluged in my laptop power supply to my muse m20 ta2020 the other day. 19V blew up the chip.
I can buy a replacement but my question is will anything else be damaged on the circuit or is the chip failing the sign of component faliure.
Looking at the board everthing else looks fine.

Arty 30th October 2012 02:50 PM

electrolit capacitors.

Mooly 30th October 2012 02:51 PM

Probably just the chip :)

If there are other semiconductors on the PCB (IC's) that have also had there maximum ratings exceeded then it's possible these to could be faulty.

I'm not familiar with the amp so would ask how long the 19 volts was applied for. I'm thinking of any 16 volt rated electroylitics although in practice these would survive 19 volts for at least a few 10's of seconds with no damage and perhaps many minutes or even longer.

Yes a very good chance its "just the chip"

junglechris 30th October 2012 02:55 PM

They have a 25v rating plus the tops havent bulged?

junglechris 30th October 2012 03:29 PM

1 Attachment(s)
Forgive me i thought i had already sent this. The duration was short and there is no visable signs of damage to any other components.
The capacitors are rated at 25v and theres no sign of bulging
I have a high school education in electronics so i know a bit but high school was over 15 years ago lol.

I've attached a picture if that helps.Attachment 309193

Mooly 30th October 2012 06:33 PM

Just change the chip :)

Its two choices, it will either work or it won't... if it doesn't we look further into it.

junglechris 3rd November 2012 04:00 PM

Ok so I've replaced the Ta2020 chip. How can I safely test it without blowing anything up (potentially)?
My concern is solder contacts. Ive done a fairly neat job of removing and replacing but lets say theres a broken connection somewhere will the chip just not work?
Or will sparks fly?

Mooly 3rd November 2012 06:36 PM

You need to have confidence in your work :)

Continuity you can check with a meter as you can for shorts between adjacent pins.

If your happy power it up.

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