LG L601i Service Manual page 86

START
Check TP1
If GSM over 31dBm ?
If DCS/PCS over 28dBm ?
NO
Check TP2, TP3
If TP2 over 29dBm ?
If TP3 over 25dBm ?
NO
Check PAM Block (U102)
OK ?
Refer to chapter 3.6.4
NO
Check Soldering of
PAM (U102) Block.
If problems stiil exist, replace the
PAM.
NO
Problems resolved?
NO
Change the Board
4. TROUBLE SHOOTING
GSM/DCS/PCS
YES
Tx is Ok
Check other part
Check ANT.SW
Check ANT. SW
YES
Module (U100)
Module(FL508)
Refer to chapter 3.4
Refer to chapter 3.4
Check TXVCO(U103)
Check TXVCO (X100)
YES
Refer to chapter 3.6.1
Refer to chapter 3.6.1
GSM/DCS/PCS
YES
Tx is OK
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(FL508