Flourecent lamp for scanner

Looking for a 10" X 1/8" flourecent scan lamp for my Microtek Scanmaker 3600. This has solder ends. No joy with Google, Ebay, Mouser, Digikey, et all. Idiotic design; the lamp is on all the time, and burns out quickly. This one burned out several years ago; decided to try to fix it finally. I think it's cold cathode, but not sure. Any ideas? Thanks JR HOME PAGE:

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Reply to
JR North
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Have you confirmed that its power supply is ok, by extended wiring-in any old small flourescent tube, then a matter of finding a dumped scanner , any make, and hope its lamp physically fits and is near enough the right colour temperature

Reply to
N_Cook

It's a CCFL lamp.

Microtek sells replacement lamps. You won't like the prices. I found one article where someone didn't want to spend $37 plus shipping. The web site suggest you call support for replacement info and pricing.

See 3rd question.

Note the different phone numbers.

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Jeff Liebermann     jeffl@cruzio.com
150 Felker St #D    http://www.LearnByDestroying.com
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Reply to
Jeff Liebermann

The lamp is kept on all the time to keep the lamp 'warmed' up and producing illumination that appears to the CCD as 'uniform, flat' across the page.

The sensitivity of your eyes is logarithmic.A CCD' sensitivity is somewhat linear [actually square law, but that's a details]. Thus, if you can barely notice brightness variation, the CCD sees that as more than a 70% change! You can imagine the tricks one has to play in the electronics to make any non-uniform brightness produce uniform images while scanning.

In my experience the tube dies a slow death. If it went abruptly, could be the driver. Careful of the driver, it produces some high voltage to fire these arc lamps.

Reply to
Robert Macy

1) I see scanners all the time at garage sales. Any one with a scanning surface the same width should have a usable lamp inside. And maybe a replacement power supply, if you need one ... 2) Look on eBay for one the same size, advertised as a replacement for a laptop display.

The color balance may be wrong (because it likely doesn't use the same phosphor mix), but it should be possible to compensate for that -- maybe the scanner will do it automatically.

Well, that shouldn't happen. The technology is the same as for laptop display backlights, and they generally last a long time.

But you could always turn it off when you're not using it ...

Isaac

Reply to
isw

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