Software Download Failure - Lenovo A516 Service Manual

Repair Manual of Lenovo A516 Mobile Phone

4.1 Software Download Failure

⚫ Faults: Software can't be normally downloaded.
⚫
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.
⚫
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,.
N
Y
N
whether TCXO
N
26
Y
Re-weld U1101
Re-weld U1101
Y
Re-weld U2104