Technics su v4 and strange sound

[Chris1991]

Hey guys. My old technics su v4 is making a strange sound the last 2 days. Its kind of hissing. It doesnt matter if it plays or not, if its open it makes that sound. It is weird because after a while it stops for some time and then its start all over again. I ve open it to check where the sound comes from and its from the power supply. Any ideas?

 

[nopiano]

It’s maybe not what you want to hear, but unless you know what you’re doing then it surely needs checking by a service engineer? It’s pretty old, so likely needs several components changing. Capacitors often fail first, but it could be anything.

The hissing, is that through the speakers, or a mechanical noise from the amplifier? Does it still play music?

 

[Chris1991]

Its kind of hissing/coil whine from the component i post. I think its the power supply. The noise can be heard only when in low volume. When i play loud it cant be heard. Its still there but not audioble.

 

[Gray]

unless you know what you’re doing then it surely needs checking by a service engineer?

That's your advice Chris 👍

 

[manicm]

May be time to give it up, or find someone who can repair. We had the later SU-V4X.

 

[twinkletoes]

Give maple audio a ring (if you're in the UK) and talk it through with a professional who fixes things every day for a living. Even it cost 2-300 quid there is precious little around at that sort of price new these days.

 

[Chris1991]

Thank you for the advices. I will ask a profesional but repair prices might be out of the since we are talking about such an old amp. Otherwise ill roll with it until it dies