LG D690 Service Manual page 54

3. TROUBLE SHOOTING
Start
Checking TCXO Block
Refer to 3.3
Check TP1
GSM/DCS/PCSTx is OK
If GSM 900, 850 over 31dBm?
Check the other part
If DCS Over 28dBm?
Check TP2.3
If GSM 900, 850(TP2) over 31dBm?
Check Tx Module
If DCS PCS(TP3) Over 28dBm?
Check MT6166
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