Dynaco ST-150 right channel not working.

[SDsailor7]

Those big caps will/would go bang. Explode if you wheHI

Those caps should be reversed according to the schematic. Notice the postive signal is not in the same place on the schematic.

Do you mean that the capacitor on the left should be on the right?

Another thing that happened while i was rechecking voltages was that the dim light that was on before on the dim bulb tester went completely out and i take it that is a good thing even though i read that if the light is dim that it is a normal thing.

 

[SDsailor7]

Those big caps will/would go bang. Explode if you where to reverse them or were installed incorectly.

So then they are installed correctly. when i saw in the schematic that one of them the positive was going to ground then i figured it was installed properly but i was still not a hundred percent sure this is the first time i am working with a component that has negative voltages and it had me baffled.

 

[SDsailor7]

Those caps should be reversed according to the schematic. Notice the postive signal is not in the same place on the schematic.

So you are saying that the capacitor on the left should have the wires on the positive side and the capacitor on the right the wires should be connected to ground?

 

[jkerr44906]

It looks correct to me. the scematic and the limeted pics i see look the same as your amp.

 

[SDsailor7]

So now i need to concentrate on the bias issue, I have been trying to set the bias and i al not getting any response when i try adjusting the trim pots P302. I have to keep troubleshooting that. Any ideas?

 

[SDsailor7]

It looks correct to me. the scematic and the limeted pics i see look the same as your amp.
View attachment 3829725
View attachment 3829726

In post #38 i posted a picture of the section of the schematic showing the two capacitors, if you can take a look at that one maybe that would help, the way i see it the capacitor on the right is the one with the positive going to ground but i could be wrong.