Lenovo A516 Manuel d'entretien - Page 26

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Repair Manual of Lenovo A516 Mobile Phone

4.1 Software Download Failure

⚫

Faults: Software can't be normally downloaded.

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Reason: Baseband chip is oppositely pasted or is in cold solder joint; CRYSTAL is

oppositely pasted (no clock signal) or is in cold solder joint.

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Shooting:

Software can't be normally downloaded or the

phone can't Power-onbe turned on.

Whether baseband chip MT6572

（U1101） is oppositely pasted

Check whether U1101 is

in cold solder joint

Check

（U2104）is oppositely pasted?

Separately check whether U2104 is in cold solder joint?

Re-weld the elements in cold solder joint

⚫

Re-download software when it is normal after replacing elements,.

whether

TCXO

Re-weld U1101

Re-weld U2104