wrote:


Squealing. More volume, more squealing. Quite annoying.

Pretty obvious it needs filters.

** Main filter caps ?

Not bloody likely.


Can't seem to find service info on the thing though.


** How odd.

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


Actually I am doing music equipment now, amps, mixers etc. and am not actually finding as many bad caps as in brownwares.

** No fooling.

More bad solder joints etc.

** Yep, music equipment gets transported a lot and subjected to intense vibrations.

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.

** 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.


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

** Looks like the piles of **** 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