Hey , does have anyone schematics or service book for Sansui 9090 receiver ? I have a broken 9090 and I can fix It only with an service book ! This monster light up but no sound and no tunner .Someone else tried to repair it before me!

Hi
You can find almost everything at http://www.obsinc.us/Dep_VOVS_Literatures.htm

Both Service Manuals, Technical Bulletins and Full Color Brochures.

Welcome to AK :)

another idea is to try ebay

9090 service manuals at ebay (http://search.ebay.com/search/search.dll?cgiurl=http%3A%2F%2Fcgi.ebay.com%2Fws%2 F&krd=1&from=R8&MfcISAPICommand=GetResult&ht=1&SortProperty=MetaEndSort&query=9090+service+manual)

Another source for service manuals is ag tannenbaum.

www.agtannenbaum.com

Chris

Have you checked all the fuses on the power supply board? I am sure that you have. F01 and F02 are the likely suspects they supply the power for the preamp section and the voltage for the tuner power supply. Check to see if you have any voltage on the two big white resistors on the tuner (left side) (should be about 36 volts). If not the problem is in the power supply I will email you the power supply section of the 9090 this weekend once I return home from my trip. PM me on Sunday as a reminder.

I am assuming that yours is a 9090 and not a 9090DB.

Good Luck,