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Old August 13th 07, 09:44 PM posted to rec.photo.equipment.medium-format
viewerofrecphoto
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Posts: 19
Default Microtek 120TF Scanner - no support

On Aug 13, 3:11 pm, "Neil Gould" wrote:
Recently, viewerofrecphoto posted:



On Aug 13, 12:04 am, Bob AZ wrote:
On Aug 10, 2:03?pm, viewerofrecphoto wrote:


Just an FYI to those of you with a Microtek 120TF
or Polaroid Sprintscan 120, or those considering
buying one.


Microtek does not sell replacement bulbs, and
does not repair them any longer.


Is the bulb visible enough to determine the bulb type? There are
many CFL bulbs, I think they call them, available. Are you able to
replace the bulb yourself?


Bob AZ


I opened it up and found a CCFL tube, about 2.7mm diameter by 92mm
long.
The closest I can find is


http://www.digikey.com/scripts/DkSea...l?name=289-100...

Its under $20, so what the heck we'll give it a shot.


Hmm. According to JKL, that bulb has an average rated lifespan of 40,000
hours.

http://www.jkllamps.com/files/BF%203-20B.pdf

This would make me suspect a power component as the cause of the bulb not
lighting. With a starting voltage of over 400V, it might be hard to test
the bulb outside of the unit... any components on the circuit board
looking a little "cooked"?

Neil


Its not an exact match - the original bulb is thinner and longer.
Microtek rated
the bulb for 6000 hours. The driver board looks pristine, so I figure
its easy enough
to solder in the new one and try it.