LG LAS950M - Page 34

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ELECTRICAL TROUBLESHOOTING GUIDE
NO WLS_3.3V (Wireless module)
NO WIFI_3.5VA (Wi-Fi module)
Is 3.7 VA to pin1
of IC303 normal?
Is 3.7 VA to pin3
of IC307 normal?
Check IC305 & 3.7 VA power line.
Check IC305 & 3.7 VA power line.
YES
YES
YES
YES
YES
YES
NO
NO
Is there H (3.3 V) voltage
to pin3 of IC303?
Is there H (3.3 V) voltage
to pin2 of IC307?
Is there DC voltage
to pin5 of IC303?
Is there DC voltage
to pin6 of IC307?
Check R318.
Check R327.
Replace IC303.
Replace IC307.
NO
NO
NO
NO
WLS_3.3V power line is normal.
WIFI_3.5VA power line is normal.
YES
YES