Fried the audio chip on H140, swap one out from another board?

[Haku]

I think I had "one of those days" just about to go out and noticed the battery was running low on my H140 so I plugged in a charger which was getting it's power from the same source as the speakers the H140 was plugged into.

Somewhere along the line, a voltage spike must've gone through the audio port when I plugged the power into the H140 because now there's always a noticable hiss on the headphone socket (but not the line-out) when it's powered on even when there's no music being played. Apart from the hiss on the headphone output, everything else works perfectly fine. Probably something to do with the chrome end-cap being connected to ground.

I have a couple of fried H120/H140 mainboards that won't power up, I'm guessing that I could take the audio chip off one of those and put it on my hissy H140 mainboard? I've been doing surface mount soldering almost on a daily basis recently so swapping over the chip wouldn't be that difficult.
But which chip is the culprit, on the RockBox site IriverHardwareCompon ents I would hazard a guess it's the "UDA1380TT - Philips Stereo audio coder-decoder" that's half-fried, is anyone able to confirm this?


Thankfully I still have my original (never taken apart) H140 which I'm now using, this hissy audio H140 was made up from about 3 broken iRivers bought off eBay and has served me very well for a very long time so it wouldn't be a huge loss if I killed the mainboard when trying to fix it.

[Dunno]

ask in rockbox irc, one of the principal developers will be able to precisely confirm it.

[Haku]

I've just swapped over the UDA1380TT chip from a fried board and it works! no more hiss.

The chip itself was difficult to prize off, had to lever it off with a knife whilst heating up the solder on the legs, the fried chip cracked when levering it off but the working one didn't crack so managed to put it onto the working board and all's back to normal.

*celebrates with an alcoholic drink*

[Dunno]

Originally Posted by Haku

I've just swapped over the UDA1380TT chip from a fried board and it works! no more hiss.

The chip itself was difficult to prize off, had to lever it off with a knife whilst heating up the solder on the legs, the fried chip cracked when levering it off but the working one didn't crack so managed to put it onto the working board and all's back to normal.

*celebrates with an alcoholic drink*

well done, you must have a steady hand for that fine soldering.