Altec Lansing ADA 880 Toroidal Transformer Replacement

Toroid Transformer is used in power supply not with headphones out. Headphones out are directly connected with headphone amplifier IC. (Note that the difference in 4700 and 8000 is number of channels. Rest of the circuit diagram is same).

Behringer HA 4700 PowerPlay Pro-XL ' SynthXL - FREE Service Manual

Two 12volt windings.

Nothing on buying the Transformer

https://www.google.com/search?q=Sansui+SHT-10+Toroidal+transformer

The only parts shown are Capacitors

https://www.google.com/search?q=sansui+sht-10+parts+diagram

..

http://www.manualsdir.com/manuals/35288/altec-lansing-ada880.html

Hello shole135, Hi, you need a 110v to 220v step-up transformer with 200 watts power specification. you can visit your local hardware store and find one. Don't replace the toroidal transformer.

40-0-40v

The toroidal core transformer(s) is going bad. This will call for a unit replacement. Is it under warranty?

The output should be 24v ac. Sounds like you have a busted transformer. Did you check out the resistor in front of the transformer.

You sound like you know what your talking about so I will not bore you with suff like glass fuses and thermal couples.

Good luck, I have had a few items like this over the years. Sometimes it's just best to send them in to the manufacture. I would look for a replacement transformer. 120v ac to 24v ac around 5 amps. Test it out and see if it works... If not, send it in.

Firstly, the fuse is just a slow blow 1 Amp short style. You should be able to get an equivalent at any electronics parts supplier (a 1.25-1.5 Amp will do as long as it is the correct physical size).

Secondly, the cause of it blowing the mains fuse is probably a short in the primary winding of the Toroidal transformer. I have now replaced the transformer in mine twice over about 4 years.

If you cannot get the original Toroidal transformer (with the correct connectors) use a 50 or 80VA 12+12V Toroidal Transformer and connect the secondary windings in series. You should be able to get one for AU$30 to AU$40.

Hi radek

If it is a toroidal,they have a nasty habit of going shorted turns on the primary. Is it blowing fuses? Let me know

robotek
ex In'gill ;)