Lenovo S930 Servicehandleiding - Pagina 30
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LENOVO S930 Cellphone Service Manual
4.5 WiFi test
Problem: Can't find WiFi
Reason: WiFi/BT/GPS/FM four-in-one chip (U2301) and its surrounding circuits have soldering
problems.
Troubleshooting:
Do U2301, U2302 have dry joint problems?
4.6 Use of Bluetooth
Problem: Can't find Bluetooth.
Reason: WiFi/BT/GPS/FM four-in-one chip and its surrounding circuits have soldering problems.
Troubleshooting:
Does MT6627(U2301) have a dry
joint problem?
Does U2302 have a dry joint problem?
Replace main chip MT6627(U2301).
Can't find WiFi.
Does MT6627(U2301) have a dry
joint problem?
N
N
Replace main chip MT6627(U2301).
Can't find BT.
N
N
Y
Re-solder.
Y
Re-solder.
Y
Re-solder.
Y
Re-solder.
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