My JAMO SUB 410 E is switching OFF/ON after about an hour of operation

[salico]

If I am posting this in the wrong section so I am really sorry but I need little help here. .. So I am using my Jamo SW 410 E with no problem,great sub,great sound etc. I have it and used it for about 3 months( the sub itself is about 11years old I bought it used) and in the last week I noticed that after about 1 hour of normal operation ( volume on no more than 30% ) some switch inside is clicking and turning the sub off and on 2 or 3 times and then resumes the normal operation... after about 20 or 30 minutes will do the same. . . I included a video so you can see and hear.Does it have anything to do with the fact that I never unplug it or even turn it off after use - I mean the sub is been on 24/7 for the last 3 months ? Capacitors in the power supply section starting to deteriorate maybe?Any ideas ..? I took it apart so I can show you how it looks inside if that helps.Thanks in advance
Video: JAMO SUB SWITCHING OFF and ON BY ITSELF - YouTube

 

[chris661]

The clicking sound is almost certainly the relay.

I suspect there's a component (over-heat/current shutdown related) that's a bit borderline on tolerance, so even if the amplifier heats up slightly, it detects that as way too hot, and shuts the whole thing down.

Going to need more pictures of anything attached to the heatsink.

Of course, I may be well off the mark, but this is my best guess.

Chris

 

[salico]

Ok,makes sense . . . but it always starts after about an hour after operation.I agree it is a relay. I will have to re - open it again to make picture of the heatsink but as far as I remember ( not 100% sure though) the only thing attached to it were 2 transistors for the amp