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replacing panel light with leds on beocenter 2100

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bzuidgeest
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bzuidgeest posted on Sun, May 27 2012 2:19 PM

The beocenter 2100 uses two light bulbs to illuminate the front panel. Part number is 8230048 skalalys dail light.

I can easily replace them with warm white leds which will last forever. The problem is that I don't know the exact amount of light they send out (lm or cd ) I have no working one so I can not use a light meter on them.

Does anyone have a clue as to the proper light strenght? It would save me buying the leds at different strenghts to test it out

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Step1
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Answered (Verified) Step1 replied on Sun, May 27 2012 6:39 PM
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Martin above supplies the correct lamps and I think most would recommend replacing like with like in this instance. Why not purchase a couple spare and place in a bag inside the unit that way in another 15 - 20 years they are there waiting?

There are only a couple of instances where I replace lamps with leds, and non of these involve dropping the voltage by more than a couple of volts. otherwise original spec bulbs win every time!

 

If you really want to persue leds, then you will have to experiment hands on, ideally with a bench supply, ammeter and lots of different led's to find the best results.

Olly

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Dillen
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Dillen replied on Sun, May 27 2012 2:41 PM

Is the problem that big ?
If you are tired of replacing burned lamps, you are buying wrong quality lamps.

LEDs will normally last a long time but not forever.
They are essentially just diodes and they will fail as such.
I've replaced several, also LEDs that were fitted instead of lamps.

Martin

bzuidgeest
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Hi Martin,

It's not about replacing lamps being a big problem. It's more like I would not know where to get the correct ones (most times, and some bulbs are expensive to). If I take the wrong bulbs I risk them producing to much heat which in turn might damage the plastics. Leds (non power) are not exactly cold, but they are much cooler

Leds I can get everywhere I use strips of four smd led's in vu meters which (with a throw of about 120 degrees per led) which gives an light effect just as good as a bulb. People that complain about leds being to white just don't realise you have warm white leds these days to. I had a pioneer amplifier that used blue light bulbs. Could not find them, blue leds again worked fine.

Almost every older device I encouter, that has bulbs, has a few that are out. Why not replace them with something a little more modern. Lower voltages, mechanical shock resistant and long life. Yes they can fail to, but I take care to operate them with manufacturer specified voltage and current and have not ever seen one fail under those conditions. Also I give them propper small power supply's, no single diode rectifing here!

All this does not answer the original question unfortunately. The service manual does not list the spec's for the lamps and I cannot find them with the original part number. If anybody has a source I could read spec's there, or order them and measure them.

 

solderon29
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I tried led's as replacements for lamps in the Beocentre 2200,which is the same unit without turntable of course.I was dissapointed with the result.Although the led's were very bright,they did'nt illuminate the tuning scale very well.With a lamp,the light is produced in all directions,but with led it's only one direction.The tuning scale assembly is cleverly designed to form a lens,making most use of the light.I used lamps again eventually.The original lamps were 18v,60mA,although the (a.c.) supply is actually 15v.I used some 15v,50mA lamps that work well.

Nick

Step1
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Answered (Verified) Step1 replied on Sun, May 27 2012 6:39 PM
Verified by bzuidgeest

Martin above supplies the correct lamps and I think most would recommend replacing like with like in this instance. Why not purchase a couple spare and place in a bag inside the unit that way in another 15 - 20 years they are there waiting?

There are only a couple of instances where I replace lamps with leds, and non of these involve dropping the voltage by more than a couple of volts. otherwise original spec bulbs win every time!

 

If you really want to persue leds, then you will have to experiment hands on, ideally with a bench supply, ammeter and lots of different led's to find the best results.

Olly

bzuidgeest
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Suggested by Hardwriter

I'll check with martin to see if we can work something out. Led directionality can be a problem with the way the scales are set up. As I said, in my experience getting a fitting lamp for a device (does not need be b&o) is sometimes troublesome. Packaging and postage sometime cost more than the lamp several times over. I agree that the original lamp should be the most good-looking in this case, but I might experiment with leds anyway. I still have original lamps in my revox recorders but those are easy to get.

Hardwriter
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Can't see its worth going to the trouble of fitting LEDs - the standard bulbs lasted me more than 15 years. 

I posted this on the previous forum in response to a question about a 2200 system: A mate of mine who is an electronics instrumentation engineer took a look and told me the replacement part is a 14v 80mA bi-pin filament lamp. You can get them from RS Components in the UK for less that £1 for 10. The RS code is 577-516.

Someone will probably tell me that's not the right replacement but for their benefit, they've been working for more than 10 years and there's no sign of damage to the plastic and the display is perfectly illuminated. 

Hope that helps.

PS: apologies for rating your last post as an answer - clicked the wrong button!

 

Step1
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Step1 replied on Mon, May 28 2012 8:32 PM

That is but one example, but B&O use lots of different bulbs and it can be a nightmare finding them sometimes. You generally find Farnell do a couple, RS another couple and there are one or two bulb suppliers that carry stock but it is I think far easier to purchase from a single source with proven track record - especially if you don't have an account or purchase from these suppliers on a regular basis. That's another thing, unless you have trade accounts there are either minimum spends or overpriced P&P charges, and getting served at trade counters isn't always easy!

Olly

bzuidgeest
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For now I think I will just get the lamps from dillen, but thank you for the info. He already responded to my email.

I did not expect the lamps to last for more than a few years longer than normal room lights. they are still incandescent lights after all. I never had equipement that used them for more than a few years in a row, so I can not really tell, luckily not a one failed on me yet.

bzuidgeest
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For now I have ordered the lamps from dillen. Considering how they are used in the dail of the 2100 that seems to be the best option.

Taking us back to the discussion about led or lamp. I just refitted an Marantz (yes I know wrong forum, but technique applies) with led replacements I'll show the result so I at least illustrate what I was talking about in my previous post. Hope nobody is offended by marantz pictures. No led b&o yet.

First the old lamp

 I use strips of smd led as replacements 

 A strip with four leds soldered on. My hand shake using tweezers and these are tiny they are not completely in line but that does not matter as this is invisible. The leds look yellow from their case but the light is actually wam white. When viewed outside bad photographs on an amp they look warm white to.

Fitting two leads to fix it in place

 

the leds soldered in the original position. the board does not fit between but again this is not visible from outside. I made the board a size that generaly fits well.

turning it on. The foto does not do it justice. The led color looks to yellow on this. In reality the color is a little more white than this. I think these warm white leds are an exelent color for use in vintage equipment.

The power supply. simple lm317 adjustable. These pcb contained an mistake :( so I have to solder the black wire to the pot directly. Works fine none the less.

shot with all three lamps replaced. The lower left one actualy uses a round bulb with difusing paper. I wasn't shure if the led strip would work there, but it looks fine to me.

The endresult. Again the leds look to yellow on this picture, but I still think this looks good. The amp is standing between my test speakers on the attic floor. in full daylight. The leds are bright enough an not even running on max voltage. If I find them to bright I can always use less leds or dim them by reducing the voltage slightly.

That's it, hope this post is usefull to someone

Malc888
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Hi there Martin...

You might be fed up with this question already...Surprise   !

I've just signed up to Beoworld after reading your post (from 2012!) and saw that you might be able to supply the backlight bulbs for a Beocentre 2100 which I've had from new. I know it's not the most 'dynamic' model of the B&o Product range ..... (I hear tuttiing from your followers !..) but  in my view, the amp still sounds amazing with my old Marantz speakers , and I'm keen to retain the existing set-up.. The problem is I can no longer see the tuner dial.. : (

I hope you might be able to direct me to a supplier of these bulbs? I'm in the UK.

Many thanks for any tips, and also for your helpful posts! 

Rgds, Malc888

Dillen
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Dillen replied on Thu, May 28 2015 3:53 PM

Welcome to Beoworld !

Yes, I have them.
You have email.

Martin

Malc888
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Hi Dillen/Martin

 

Many thanks for sending the LEDs for my Beo Centre 2100 which are now installed (thanks to AVA B&O servcing), and fully working!

Took a year of hunting, but worth it !

Malc888

Dillen:

Welcome to Beoworld !

Yes, I have them.
You have email.

Martin

 

Dillen
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Dillen replied on Fri, Jul 31 2015 8:15 AM

Lamps...  Not LEDs. :-)

Martin

Edhinho
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hi Martin, just acquired a rather tired beocentre 2200 and need a set/pair of display lamps, can you supply? also the old ones don't seem to want to come out of the holder! any tips? thanks in advance mh
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