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Old September 18th 07, 01:09 PM posted to rec.photo.equipment.medium-format
Neil Gould
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Posts: 262
Default Microtek 120TF Scanner - no support

Recently, viewerofrecphoto posted:

On Aug 14, 7:17 am, Noons wrote:
On Aug 14, 6:44 am, viewerofrecphoto wrote:

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.


Please let us know of the results.



I'm sorry to say, the new bulb did not make a difference. It does
light, sometimes, but after using it for a couple of scans, it goes
out and won't relight. Same behavior as the old bulb.

From what I can tell, the driver board has 3 inputs, Ground, CTL and

+12, so its not as easy as replacing it with an off the shelf inverter
board.

Sorry to hear that the easy solution wasn't the fix.

If I follow what you've described, that it works soon after you turn the
unit on, but soon stops working, it sounds as if there is a bad capacitor
in the lamp's trigger voltage circuit.

Thanks for the follow-up.

Regards,

Neil