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 2690 on off solution

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PostSubject: 2690 on off solution   Sat Jul 30, 2011 11:36 am

Nokia 2690 keypad Line Tracks and filter IC jumper ways solution with power ON/OFF key
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Ensure that the keypad membrane is perfectly clean before trying to trace each corresponding keypad keys that is not responding. Majority of each group of connection has three keys are connected together, therefore if only one or two keys are not working, the problem may lies on open line tracks. If more than three or all of keys are not working the problem may lies on a damaged EMI-ESD filter chip.
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