Audio Asylum Thread Printer
Get a view of an entire thread on one page
|For Sale Ads|
Thanks, John. What had me confused until you said this is that apparently I bought a hybrid Sansui tuner. Someone put the TU- 517 guts into a TU-717 chassis. I'd like to send you pics of inside and outside if you don't mind.
I don't think that somebody actually switched boards. Probably just two different revisions of the same board. If yo go over to the TIC and look at the pics of the 717 & 710 I think you can see that both pics show both 71 & 122 in the 700 series tuners. A little tough to see but I think they're both there.
On the FM tuner mod site, on the preamp board, #F-2678, they give a list of capacitor locations to replace. Which of these are most important for FM? I'm not too concerned about AM as I don't listen to it.
Circuit Board #F-2678 - When reading the schematic left to right, top to bottom:
C24: 100 µF 16V
C34: 33 µF 10V
C50: 10 µF 10V
C82: 10 µF 16V
C100: 47 µF 16V
C101: 47 µF 6.3V
C74: 47 µF 16V
C73: 47 µF 16V
C72: 100 µF 16V
C82 & 100 are AM B+ de-couplers. Al the rest are either FM sig path or FM B+.
One more question. In the FM tuner mod, it combines the TU-517/717, it mentions an audio board of #F-2730. For the life of me, I can't find this board in my 717. Where is it?
2730 is the detector board hidden inside the vertical metal box located between the transformer and the main board.
I took a picture of the bridge I made for the TU-X1 power supply. It is sitting in place waiting for soldering. Here is a pic:
Excellent! Thank you, John.
Post a Followup:
Post a Message!
This post is made possible by the generous support of people like you and our sponsors: