Technics SE-9600 Stereo Power Amp

PhantomBox · 27th April 2010, 07:31 PM

Hello fellow enthusiasts.

A friend of mine gave me one of these Technics SE-9600 amps, asking me to check it out.
It hasn't been fired up for some time, so I started with mixed feelings.
Here's what I found: After I turned it on, it worked OK for some minutes. Then the volume decreased and distortion increased.
I turned it off and waited a minute. After turning it on again, the same happened, but a lot quicker than the first time.
Maybe its just the dissipation paste that needs to be replaced, Maybe its something more serious.
Any suggestions?

Thanx in advance,
Phantombox

PhantomBox · 27th April 2010, 07:34 PM

Technics SE-9600
I forgot to mention: the huge heat sinks stayed cool all the time. (Maybe it not the dissipation paste after all)

jaycee · 27th April 2010, 09:02 PM

On an amp this old, electrolytic capacitors most likely need renewal. It could be a coupling cap going bad.

Technics, SE-9600 has the service manual. Looks like it has some kind of regulated power supply.

27th April 2010, 07:31 PM	#1
PhantomBox diyAudio Member Join Date: Jan 2008	Technics SE-9600 Stereo Power Amp Hello fellow enthusiasts. A friend of mine gave me one of these Technics SE-9600 amps, asking me to check it out. It hasn't been fired up for some time, so I started with mixed feelings. Here's what I found: After I turned it on, it worked OK for some minutes. Then the volume decreased and distortion increased. I turned it off and waited a minute. After turning it on again, the same happened, but a lot quicker than the first time. Maybe its just the dissipation paste that needs to be replaced, Maybe its something more serious. Any suggestions? Thanx in advance, Phantombox

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27th April 2010, 07:34 PM	#2
PhantomBox diyAudio Member Join Date: Jan 2008	Technics SE-9600 I forgot to mention: the huge heat sinks stayed cool all the time. (Maybe it not the dissipation paste after all)

27th April 2010, 09:02 PM	#3
jaycee diyAudio Member Join Date: Apr 2004 Location: Norwich, UK	On an amp this old, electrolytic capacitors most likely need renewal. It could be a coupling cap going bad. Technics, SE-9600 has the service manual. Looks like it has some kind of regulated power supply.

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