My beautiful SX-1980

Saturday, December 31, 2011

Sansui 9090 recap and restore

I got a 9090 to recap and restore from a local to me audio enthusiast (Hi Greg!). It's a little dirty and needing cleaned, it also has a few scratches on the wood case, but in excellent shape overall. Caps I'll be using are: Panasonic FC for the preamp sections, Nichicon PW for the power amp and power supply, Nichicon ES for the bi-polar caps, Panasonic ECQ film caps for anything under 1uF and Panasonic THA for the three filter caps, one of them is on the power supply and the two main filter caps are mounted under the receiver. I also am replacing the lamps with LED's.

Here is some before photos:

Tuner power supply


Equalizer board


Tone amp board I forgot (again!) to get a before photo of. *smacks head*

Volume control board


Protector board


Driver amp board


Power supply board, the cap laying on its side is the original cap that went where the other one is now (almost started again without taking a before photo!)


And after recap!

Tuner power supply


Equalizer board


Tone amp board


Volume control board


Protector board


Driver board


Power supply board


New filter caps, the originals were 6800uF 71v, I upgraded them to 10000uF 80v, the bass and overall power of the receiver benefited from this upgrade, the depth, detail and punch of the sound is tenfold better then when I listened to it with the originals.


This thing has a rich, warm and very powerful sound to it but still has a lot of excellent detail in the mids and highs. And yes, you can have a small concert with it as shown in this video, this thing was only pushing about 3 watts and look:



And put back together!