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
Dear members,
I have encountered a problem with my Beocenter 1. After changing sources, there is a crackling noise from the speakers. This goes away after a couple of seconds and is worse when the TV is still cold. Any ideas what that could come from? Any remedies?
Thanks!
Greetings,
Kai
Hi again Kai,
where is the TV? Is it in a cold or humid room?
You could have a build up of dust/dead insects (I remember a post of the inside of a BV5 a while ago that was absolutely full of it!). This could have an impact. You could try either blowing it out or using a vacuum. Otherwise, it's likely to be a component on its way out meaning a visit to or from an engineer.
Dave.
Hey Dave,
humidity is very low. But I don't know about the previous user. Video Days are 155 - pretty low. The cracking noise is more like a couple of minor pops. It's from the speakers only and once the TV/Radio/DVD is running it goes away. Therefore I don't think that this has got something to do with dirt. Maybe something with capacitors having dried because of little use over a long time maybe? I think if it's not getting worse I'll leave it as it is.
This sounds like build up of dirt on the power supply board. Do you get a picture on the TV or is it just going to standby. If I remember correctly, BC1 is a CRT, these have a protection circuit that will kick in eventually. Check for dried caps, and dry joints. There's an excellent guide somewhere in this forum that covers the MX series, but also applicable to this model.
Hope this helps a little, I've fixed a few with this issue. Normally a minor fix, but left, can get worse.
The TV works absolutely perfectly. And there are only a couple of faint pops after switching sources (they don't get louder or more quiet when adjusting volume). Really minor "problem" actually. It might be worse when the TV is cold but I'm not sure. And the sounds do come from the speakers. Not somewhere from the interior. It sounds like something that has to do with the generation of the sound (sound circuit). Don't know how to express it properly. It goes completely away after a couple of seconds.
Hi Kai, this sounds like a very simple problem with the Amplifier board. It could be most likely failing caps, but check the power supply board anyway, as most problems do filter through as a crackle on the sound. Dry joints between the I/O and the speaker, but especially a failing crossover or cap seems most likely. Alternatively, check the Nicam board, as build up of dust can cause this problem. It's very common on beovisions of this age.
I've talked to my local repair shop today and they told me that this was pretty normal as long as it goes away after a couple of seconds/minutes. The cause is the high voltage of the Beocenter 1 which becomes audible through the speakers when the tube is starting. Some examples apparently had this more than others but pretty common nonetheless. They told me they've encountered this symptom a couple of times over the years, that there's not much to do about it and and that they wouldn't even know where to start looking for a fault. Thought this information might be interesting to some.
However, I reckon that the build-up of dirt mentioned by others in this thread might well have to do something with the problem. When listening to the radio no crackling noises are audible - not even after starting up from cold. However, as soon as the tube starts, the problem occurs for a couple of seconds. This all speaks for the above hypotheses that dirt probably has got something to do with it.
Greetings