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Samsung GT-C3322 Metro Duos Key Input not Working Solution

 Samsung GT-C3322 Metro Duos Key Input not Working Solution Shematic,Diagram , Circuit 

 Samsung GT-C3322 Metro Duos Key Input not Working Solution Step by Step

Step 1

SIM Switch key
working?
Check the TACT300 (crack, open, etc) &
change the TACT300

Step 2

Function Key &
3×4 Key working?
Check Dome sheet (crack, open, etc) &
Change Dome sheet & UCP20

Step 3

Key LED working?
Check U302, LED300~305 (crack, open, etc)
& Resolder U302, LED300~305, R323~R328

Step 4

Check the S/W setting
(key auto lock, etc)
Unofficial Support Site By welcome Zone Haldwani 

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Samsung GT-C3322 Metro Duos Key Input not working Solution 
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Updated: 09/12/2015 — 11:03 PM

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