Here's the solution for not working QWERTY and NUMERIC keypad keys of Nokia 6760 slide. This simple guide will show us the connection line paths that we've tracked down for easy troubleshooting procedures.
The navigation or upper keys were connected to a separate key matrix or flex cable, since this phone is an slider designed.
In Nokia 6760s there are filter IC's used or mounted on the PCB board for EMI and ESD filtering. The picture below tells us how the inner solder ball bumps of the said filter IC being connected. This may help for those who are looking for jumper solution of the said keypad filter IC. These solution also includes each of the inner and outer core layers of the keypads PCB layout matrix.
Here's some simple tips on how to fix and troubleshoot the keypad problem on Nokia 6760 slide:
Navigation Keys such as send, power key, home, menu, left, right, soft left, soft right, up and down not working repair procedures:
1. Check/clean the upper key matrix and keypad membrane.
2. Check/ replace the flex ribbon wire.
3. Check, rework or replace the filter IC at the right side. (Note: this filter IC is also used for display filtering)
Nokia 6760 slide QWERTY and Numeric keys not working repair procedures:
1. Check/clean the keypad PCB matrix.
2. Clean/replace the keypad membrane..
3. Trace a certain key connection if there is only one or two keys don't work., mend to reconnect it if found open circuit or cut-off lines.
4. Rework or replace the keypad filter IC,. Start at the left side filter IC first, then the other one on the left.
Best regards... Enjoy!
The navigation or upper keys were connected to a separate key matrix or flex cable, since this phone is an slider designed.
In Nokia 6760s there are filter IC's used or mounted on the PCB board for EMI and ESD filtering. The picture below tells us how the inner solder ball bumps of the said filter IC being connected. This may help for those who are looking for jumper solution of the said keypad filter IC. These solution also includes each of the inner and outer core layers of the keypads PCB layout matrix.
Here's some simple tips on how to fix and troubleshoot the keypad problem on Nokia 6760 slide:
Navigation Keys such as send, power key, home, menu, left, right, soft left, soft right, up and down not working repair procedures:
1. Check/clean the upper key matrix and keypad membrane.
2. Check/ replace the flex ribbon wire.
3. Check, rework or replace the filter IC at the right side. (Note: this filter IC is also used for display filtering)
Nokia 6760 slide QWERTY and Numeric keys not working repair procedures:
1. Check/clean the keypad PCB matrix.
2. Clean/replace the keypad membrane..
3. Trace a certain key connection if there is only one or two keys don't work., mend to reconnect it if found open circuit or cut-off lines.
4. Rework or replace the keypad filter IC,. Start at the left side filter IC first, then the other one on the left.
Click on image to view larger file
Nokia 6760 slide Keypad Solution with filter IC Jumper Ways
Credits: GsmAngel
Best regards... Enjoy!
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