ETEK Note Mix MA-400

Squealing. More volume, more squealing. Quite annoying.

Pretty obvious it needs filters. Can't seem to find service info on the thi ng though. I think I can do it without but I would really like to see how i t comes apart before tearing in to it. It has the flip top like a laptop an d you know how those can be. I don't want to screw it up, rip the main ribb on to the lid or anything like that.

Actually I am doing music equipment now, amps, mixers etc. and am not actua lly finding as many bad caps as in brownwares. More bad solder joints etc. Is there ac chance that's the problem here ? If I had history on it, if the problem used to be intermittent, great.

At first I figured this lil thing has to be class D, but a post on the net alludes to it using LM3866 which is not. Who knows right now ? At this poin t though, both channels are doing it so I am leaning toward the PS. As smal l as this thing is, I will probably have to search Digikey for good enough, snall enough caps for it.

Seriously though, right now I am concerned about getting in there without k illing the patient. Anyone have one of those things apart ?

Thanks.

** Main filter caps ? Not bloody likely.

** How odd. It's an utterly obscure make and a looks like a shit awful pile of Italian junk.

** No fooling. More bad solder joints etc. ** Yep, music equipment gets transported a lot and subjected to intense vibrations.

** Yes, I found that post.

LM3886s can deliver about 60 watts into 4 ohms so that dos not tally with the 200wpc rating.

Who knows right now ? At this point though, both channels are doing it so I am leaning toward the PS.

** Bad multipin connections and cracked solder are far more likely culprits.

As small as this thing is, I will probably have to search Digikey for good enough, snall enough caps for it.

** Drivel.

** Looks like the piles of shit were never retailed outside of Italy - most Google hits are in Italian or Greek.

Music gear, once sold, tends to travel all over the place and way beyond any support networks that exist. Owners never understand this and expect miracles from service techs, performed while they wait and imagine peanuts is sufficient reward.

.... Phil