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Go Back   GSM-Forum > GSM & CDMA Phones / Tablets Software & Hardware Area > Chinese Models & Cloned Phones

Chinese Models & Cloned Phones All China Phone Platforms like (MTK, Spreadtrum.. etc.) Cloned Nokia Nokla & Motorola . etc. Phones are included

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Old 07-31-2011, 20:16   #1 (permalink)
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chaina keypad problem


i faced some keypad problem in chaina phones, just like all keypad not working/ some time automatic keypad working/ some time only one keypad automatic press all time/ some time working some time not working etc, how i repair this problems, some time after changing charging connector problem solve but 75% sets are not solve, plz help me

thanks in advance
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Old 08-01-2011, 16:50   #2 (permalink)
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plz help me any body
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Old 08-02-2011, 05:37   #3 (permalink)
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today face a new problem, gfive u505 after some time keypad not working, any solution
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Old 08-02-2011, 05:54   #4 (permalink)
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at first rehot cpu .

if problem is same then reball cpu.
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Old 08-02-2011, 06:11   #5 (permalink)
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@ tuntai

in china mobile keypad track direct connected to CPU. Keypad matrix it direct mount in main pcb or in a separate board connect by Flex.

now there is so many fault arise in key matrix,

basically what is need to check

1- voltage

2- track connectivity / same track key working or not

3- if flex type connection , change flex & good soldering

4- check any capacitor /resistor ground from defective key track

finally reball cpu / or replace


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Old 08-02-2011, 12:05   #6 (permalink)
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