ARCHIVED FORUM -- March 2012 to February 2022READ ONLY FORUM
This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022
Hi Everyone,
Just wanted to ask if anyone knows what might be happening with my Beocenter 4000 the 70's version. I brought it cheap from the internet, it arrived and was working 100% fine for a few days but over the weekend I plugged it in and switched it on but when you now switch it on from a cold start you just get a buzzing/humming noise from the speakers. If you try to get fm,mw/lw or the fm presets to work they wont. If they do choose to work they sound terrible but if I select phono I get the same buzzing even thou nothing is plugged into that din plug. I have found if I switch it on and select tape and turn the volume down for about 5 mins the beocenter works as it should do and the sound is really nice and the buzzing noise has also gone after 5 - 10 mins of the unit being switched on. It sounds wonderful really bright and nice the heatsink it running nice and cool it only gets a bit warm after a few hours of light use on classical or spoken word. I have opened the unit up and it looks like its had a service recently as the 2 big capacitors looks quite modern and shiny new and the same goes for a lot of the transistors and resistors and it looks like their is also a lot of new shiny solder. I am just wondering if anyone may be able to help with why its making this buzzing sound because its annoying. I have the following plugged into the unit if it helps:
1 Pair of Beovox s45 (70's Version)
1 pair of Beovox s30
Beogram CD X 2
Fm & Mw Ariel's
Many Thanks,
Lewis
A lot of faults to these lovely units are caused by aging capacitors.In this case, I suggest you check the ones fitted to the regulator board.There are four or five, cheap components, replace them if in doubt.
Martin