sansui hot to the touch

Tweakers' Asylum

Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

I recently found my volume control maxed out on my Sansui integrated amp (au 317).
The heat sinks felt like they were very warm, after many years of no noticeable heat.
I took a look at the DC offset, and the bias, things looked ok (Dc<1.5MV AND THE bias,11.0MV) not perfect, I adjusted both numbers closer to nominal.
I then hooked up my signal generator to the aux inputs, my oscilloscope to the L^R speaker outputs, and checked the wave form from 400hz to 20khz the form and p-p voltages stayed consistent.
I am thinking things are ok..Thoughts on any thing else I should check?
What a great hobby this is...

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Topic - sansui hot to the touch - walkstoslow 07:54:47 01/13/25 (8)

It was probably oscillating at a very high frequency - Chip647 08:31:29 01/14/25 (7)

RE: It was probably oscillating at a very high frequency - walkstoslow 11:08:10 01/14/25 (6)

RE: It was probably oscillating at a very high frequency - Chip647 09:01:08 01/16/25 (5)

thanks for your expertise...one more question..... - walkstoslow 11:50:37 01/16/25 (4)

RE: thanks for your expertise...one more question..... - Tre' 19:12:41 01/16/25 (3)

duh...4.1mv...nt - walkstoslow 20:01:31 01/16/25 (2)

4.1mv, + or - is just fine. nt - Tre' 14:48:42 01/18/25 (0)

They can float around a little around the null - Chip647 12:21:06 01/17/25 (0)

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