Re: OT but leds are leds ... Message #2 Posted by Thomas Falk on 7 Jan 2011, 6:08 p.m., in response to message #1 by Alberto Fenini
Sorry to bring bad news ... but you may not have a chance to swap segments from one display to the other.
It can not be seen from the pictures if the segments are single chips or all segements of a digit are on one chip. In any case the chips are glued to a pad by conductive glue and bonded with wires which connect to another pad.
I assume that the bonding wires are broken, because they are not protected by anything. If you can't find a fully working display, your only chance is to use the one with the most working segments. If you are very lucky, you may bend the wire in such a way that it gets contact to the display. But this required a steady hand, patience and good eyes and it will probably not work for a long time.
You may look for a company which does chip bonding. If you find one, they may even be able to repair both displays.
Have you checked the displays? With a 3V voltage source and an 3.3k Resistor you should be able to test which segements are working.
Electronic watches are an very impressive technology but even more difficult to repair than calculators.
Greetings,
Thomas
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