Might have fried the output of Axo

#22

I guess somewhere (on site/on forum in form of conspicuous sticky topic) should be a recommendation how to avoid this since it can happen easily.

#23

I guess I'll have to see a friend about a hot air soldering gun then...
Before I do something possibly stupid,I guess its the QFNL IC in the image? It says IC4 but has the text "AIWI48JPDTY", which doesn't turn up any results when I octopart it..

IMG_20151208_162414.jpg1349x1292 274 KB

#24

IC4 is TPA6132A2. The dot marking pin 1 is on the top-right in your image.

#25

Hi Johannes,
I just got around to experimenting with my v1.1 Axoloti today. I love it! But it just broke. It seems to be behaving like others have described in this thread - low voltages and IC3 heating up.
Should I follow the procedure to bypass IC4?
Many thanks,
Harry

#26

I replaced IC 4 with a new one. Not too hard, but required a hot air station and a magnifying glass.

#27

Hey there I got 2 boards now with the same sympoms, IC3 hot and red light blinking. Both boards had these failures after I fucked up something with the dc input.

@Johannes you think my boards have the failures described in this thread?

Since I'm struggling a lot with ground noises in my setup I really don't want to bypass the ground loop break circuit.

I guess replacing IC4 is then the best option? Would this be the right replacement part? https://www.aliexpress.com/item/IC-TPA6132A2RTER-TPA6132A2-TPS6132A2RTET-WFQFN-16-Original-authentic-and-new-Free-Shipping-IC/32699546195.html?spm=2114.01010208.3.9.Hm1h98&ws_ab_test=searchweb0_0,searchweb201602_2_10152_10065_10151_10068_10193_10194_10136_10137_10060_10155_10062_437_10154_10056_10055_10054_10059_303_100031_10099_10103_10102_10101_10096_10052_10053_10107_10050_10142_10051_10084_10083_10080_10082_10081_10177_10110_519_10111_10112_10113_10114_10180_10182_10184_10078_10079_10073_10186_10123_10189_142,searchweb201603_2,ppcSwitch_2&btsid=0669cbdb-3288-409f-9914-06182a77f321&algo_expid=b547535a-6146-41b6-91a8-3631930b549d-1&algo_pvid=b547535a-6146-41b6-91a8-3631930b549d

I could ask somebody at my local fablab to do the exchange for me.

#28

Yes that looks like the one,with a hot soldering gun, a microscope and liquid flux its possible to do.

Audio output does not work
#29

Ok thx for the tip. Already talked to Johannes, he confirmed that it should be the right part.

#30

Hello all! I have a question:

What can I do to use a single output (either jack or mini-jack) of the axoloti to work with headphones as well as stereo receivers, portable speakers, etc?
Just like an iPod works with any of those using a single mini-jack output.

#31

terrible design. DC input kills ALL units. fuck me, just waisted 200 euros on TWO boards :frowning: