Sansui AU-222 restoration

[bermudabob]

Sansui Au -222 Switch Wiring Diagram

Hi,
read this post and try to get an answer for fix my Sansui Au-222 amplifier.

I purchased a Sansui Au-222 parting out unit for restauration.
Meanwhile I got the lost three of the 5 toggle switches to complete the unit. Switch 4 and 6 (marked with rectangles in the attached sketch) are the parts in the unit.

SM Toggle Switch Parts:
S2 Tape Monitor,
S3 Stereo/Mono,
S4(a,b) Loudness,
S5 (a,b) Low Filter,
S6 (a,b) High filter.


I´m not as skilled as it might be nessesary to understand the tricky wiring of the toggle switches so i need help with a kind of wiring diagram or detailed Fotos from a reference maschine to go on.

Therefore I attache a drawing to illustrate the current situation. The drawing should be usefull to add lines for a wiring diagram for to the F-1083 Board. The tape monitor terminal must be done seperatly. The placement of the caps and resistors of Switch 2,3,4 shown on the drawing, is my result i suggest it will be right to the schema. If not please give me addvice.

I´m a newby with problems to translate the connections of the schematic diagram to the physical connetion on each pole of the toggle switches. Especialy the pole connections of the shielded wires. So have mercy and give me and the amp a chance.

Many Thanks for your feedback

Best regards

ps:
I´m looking hardly for the original knobs for the Sansui Au-222.
Nothing to fond in the bay. Perhaps someone in the communitiy have some.Thanks!

 

[battella]

restoring

Hi. A friend gave me his AU-222. It's working but the sound is flickering. I'll start my restoration and just found this forum and your post.


Regards from Brasil!

This is a great way to start the week, just found an amazing Sansui AU-222 in my grand parents' barn 😀, it looks perfect on the outside though a little dusty. The inside is surprisingly clean and looks very original. The pilot lamp is blown but the rest seems ok. I fired it up with my bulb tester and got all the right voltages across the board but it sounds a little tired so I'm planning a full restoration.

Beside replacing all the electrolytic caps what should I be looking for ?
I've been making my list of capacitors but the nichicon KG 1500µF filter cap is really small and doesn't really make the inside look as good as it should, would it be ok to fit a 4700µF instead and also change the rectifier diodes (if yes what specs should I be looking for as the original are 10D1, 1.5amps) ? Also there are two very small caps on the head amp board : 1.5µF, 15v BP, I can't seem to find them, any advice on what I should look for (50v 2.2µF was the closest I could find in the nichicon ES series)

This is how I found the little treasure : View attachment 519232 View attachment 519233