Lamp PowerSupplies Blowing

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ghostgunna Contact options for registered users 's Avatar (by Gravatar) posted on
July 9, 2006, 2:10 am
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Hi guys.

I purchased 2 similar lamps from Ikea a couple years ago.  I used them
for about a year then put them in storage for about a year.

The other day I took 1 out & the globe wasn't working.  I got a new
globe & it was working.  After about 5 minutes the globe dimmed over a
second or 2.  I switched power supplies & the lamp was working again
but 5 minutes later the same thing happened again.

When I removed the globe I noticed a tiny instruction inside the lamp:
"Max 12V 20W".  The globe I was using is 12V 50W!  I've tried the
correct globe in the lamp now but it won't even switch on.

Have I ruined both the power supplies?  They are marked as 12V 1580mA.

Thanx 4 looking.


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Alan Rutlidge Contact options for registered users 's Avatar (by Gravatar) posted on
July 9, 2006, 3:17 am
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Re: Lamp PowerSupplies Blowing



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Yep, unless they are self protecting types (e.g.switchmode with some
in-built overload protection) I'm afraid your 240V - 12V transformer has
probably gone into meltdown. :-(   A 12 V 50W dichroic lamp will draw more
than 4A when hot, Gawd only knows how much more at switch on when the
filament is cold.
Ikea stuff is cheap enough.  Throw it out and buy another one.  This time
read the label before changing the bulb. :-)

Cheers,
Alan



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ghostgunna Contact options for registered users 's Avatar (by Gravatar) posted on
July 10, 2006, 7:27 am
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Re: Lamp PowerSupplies Blowing


Thanx 4 your help Alan.

Do you think the lamps are still in good working order?  Should I look
to keep them & replace just the power supplies or buy whole new lamps?

Thanx again.

Alan Rutlidge wrote:
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Alan Rutlidge Contact options for registered users 's Avatar (by Gravatar) posted on
July 10, 2006, 8:56 am
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It depends on the cost of replacing the lamps' power supplies  vs replacing
the whole thing.

Q.  Do Ikea still stock this particular lamp?
Within recent times they seemed to have gone away from extra low voltage
types.
These are the only obvious ELV types I could find.
http://cebas.ikea.com.au/prod_template4.asp?product_id21%765&se_id37%&page_id63%429300251009&Cat=9&Scat39 %
http://cebas.ikea.com.au/prod_template4.asp?product_id23%183&se_id37%&page_id63%429300251009&Cat=9&Scat39 %





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ghostgunna Contact options for registered users 's Avatar (by Gravatar) posted on
July 11, 2006, 1:29 pm
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Re: Lamp PowerSupplies Blowing


Thanx Alan.

I was worried that the lamp itself had been fried but it sounds like U
think they will still work.

Those aren't the lamps I have.  It's probably not cost effective to
just purchase powersupplies anyway.  But I'll keep it in mind.

Thanx again.

Alan Rutlidge wrote:
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http://cebas.ikea.com.au/prod_template4.asp?product_id21%765&se_id37%&page_id63%429300251009&Cat=9&Scat39 %
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http://cebas.ikea.com.au/prod_template4.asp?product_id23%183&se_id37%&page_id63%429300251009&Cat=9&Scat39 %
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Lohn J. Deister Contact options for registered users 's Avatar (by Gravatar) posted on
July 11, 2006, 10:50 pm
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Re: Lamp PowerSupplies Blowing



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I think you can get them on their own at Ikea for about $10

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http://cebas.ikea.com.au/prod_template4.asp?product_id21%765&se_id37%&page_id63%429300251009&Cat=9&Scat39 %
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http://cebas.ikea.com.au/prod_template4.asp?product_id23%183&se_id37%&page_id63%429300251009&Cat=9&Scat39 %
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ghostgunna Contact options for registered users 's Avatar (by Gravatar) posted on
July 24, 2006, 6:41 am
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Re: Lamp PowerSupplies Blowing


Thanx Lohn.

Lohn J. Deister wrote:
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http://cebas.ikea.com.au/prod_template4.asp?product_id21%765&se_id37%&page_id63%429300251009&Cat=9&Scat39 %
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http://cebas.ikea.com.au/prod_template4.asp?product_id23%183&se_id37%&page_id63%429300251009&Cat=9&Scat39 %
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