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Missing Chip I have a Franklin Digital clock I found. It is missing I.C. U9 on the 1104B circuit bd. I was wondering what the Chip # is? The Model of the clock is MP256-100021. Thanks for the help.

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Look it up on the Internet. Most of these kinds of things are listed. You may get help someplace from an electronics repair man as well.

Posted on Sep 27, 2009

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Posted on Jan 02, 2017

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Some of the segments in the numbers on the face of the clock have disappeared. Why?


Possibly the segments have failed or the driver chip has partially failed.

The contact between an led or lcd display is not always hard wired to the circuit board where the driver chip is located. Often the contact is made by sandwiching a conductive flexible strip between the display and the circuit board.

The initial assembly is carried out in near operating theatre conditions and once assembled the system provides a cheap solution that has proved fairly reliable in most cases. In some cases a few years of heating and cooling and being bombarded with atmospheric dust and moisture and vibration will spoil the connection.

While it is usually fairly easy to take the connection apart for a very thorough cleaning, it is the thorough cleaning that is far more difficult than it sounds and the usual outcome is to restore the missing segments and lose some of the others.
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Good day!!!


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