Lenovo S930 서비스 매뉴얼 - 페이지 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?

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?

Replace main chip MT6627(U2301).

Can't find BT.

Re-solder.

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