Sansui B2101 - DC voltage gone crazy 10V++ and something missing on board.

Welp...this project is over for me. I just blew a Sanken output transistor.

I did not have a dead short or do anything real stupid...that I can see.

Even though I could not get a reading between the ground pin and the hot (out) pin, I moved on to the 3rd adjustment.

I was on the hot (out) and emitter (out) pins...adjusted kVR-3 to be within range. It was steady at 6.8mV. And then a flash.

View attachment 1027199

I'm wondering if my test point pins aren't configured different from what's shown in the service manual (?)

Oh no... im sorry your trans blew man...

Currently myself Im still stuck at 2-1.. after replacing some transistor from ebay im getting something like 27V.. and the other channel is somewhat 1.7V..

Im going to replace back the old transistor and give it a try again.

20171019_033645.jpg
I happen to have a socket that is able to fit in the TP on 4619.. so this what I use..

You an try ebay for replacement..
Screenshot_20171019-034829.png
 

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Yeah, I have the same socket and extension cables.

I'm debating what to do next. I could try to disconnect power to the right channel...that's the one I wrecked. And then try 2-2 again (?) on the left channel.

I'll probably just put it on the shelf for now.
 
20171019_034725.jpg
This is my B2101 in a mess now.

I'll try another forum and I'll post your issue as well see if they can come up with a solution.. Have you heard of diyaudio?
 
I've browsed diyaudio, never joined.

I have quite a few other amps to listen to.

...and a bunch of other projects to work on before winter.

The replacement Sanken is available on eBay here in the States. I wonder if I damaged anything else. The fuse blew, too.
 
I've browsed diyaudio, never joined.

I have quite a few other amps to listen to.

...and a bunch of other projects to work on before winter.

The replacement Sanken is available on eBay here in the States. I wonder if I damaged anything else. The fuse blew, too.

BigElCat, Like they mentioned I think you better get from element14.
 
Welp...this project is over for me. I just blew a Sanken output transistor.

I did not have a dead short or do anything real stupid...that I can see.

Even though I could not get a reading between the ground pin and the hot (out) pin, I moved on to the 3rd adjustment.

I was on the hot (out) and emitter (out) pins...adjusted kVR-3 to be within range. It was steady at 6.8mV. And then a flash.

View attachment 1027199

I'm wondering if my test point pins aren't configured different from what's shown in the service manual (?)

Element 14 would cost $20 an once for shipping.

I'm looking for a source in the States.

Is this the right Sanken ?

https://www.digikey.com/product-detail/en/sanken/2SC3519/2SC3519-ND/3929389

I ordered a nice service manual for the B-2101.
 
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