Lenovo A859 Servicehandleiding - Pagina 19

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Repair Manual of Lenovo S920 Mobile Phone

Calling

No voice heard from the other

side during the call

Use earphone and hands-free to verify

whether there is voice?

Replace the headphones and then

rechek whether it is normal

Check whether B1401,B1403 are well

welded. Re-weld and test

Replace U1201

Cold solder joint

of main chip or

main

chip

abnormal