This is the basic circuit diagram of the mobile handsets and phones. This diagram helps to find out the root cause of the problems. This diagram also shows the relation between the IC's. which part is connected with which IC. For the general people also this helps to find out what is happen to your mobile set, they can find out.
For eg :- if the keypad is not working then you can find that your mobile's CPU is not working properly.
if speaker is not working then Audio IC has been damaged. like this way we can easily find the problem and can go for the solution
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A simple circuit diagram which helps to find out the solution for repairing.
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