Sansui 9090db Wonky Source Selection

[loungeact21]

I have a gorgeous 9090db that sounds absolutely amazing most of the time. The issue is that it regularly drops the left channel, or it comes though crackly and muted. This is typically remedied by switching back and forth between channels. My tech cleaned and tested it for weeks, finally deciding that it needed a new selector switch w/circuit board. Anyone know where to locate this? I've searched quite a bit and come up empty handed. Any advice is very appreciated!

 

[Robisme]

Well, I would clean the switch again. Keep your eye on E-bay for someone parting out a 9090DB.

Could be the speaker relay too.

Rob

 

[rcs16]

Figure out which exact wafer, contact causing the issue and zone in on that. try to get a pink eraser onto the wafer to clean off the tarnish. It ain't easy, just take your time, might have to dis-assemble a fair bit to get good access. You can test the contact resistances with your ohmmeter.