LG U8500 Service Manual page 90

START
Check TP1
If GSM over 31d Bm ?
If DCS/PCS over 28dBm ?
NO
Check TP2, TP3
If TP2 over 29dBm ?
If TP3 over 25dBm ?
NO
Check PAM Block (U209)
OK ?
Refer to chapter 3.6.4
NO
Check Soldering of
PAM (U209) Block.
If pr oblems stiil exist, replace the
PAM.
NO
Problems resolved ?
NO
Change t h e Board
4. TROUBLE SHOOTING
GSM/DCS/PCS
YES
Tx is Ok
Check other part
Check ANT. SW
YES
Module (U207)
Refer to chapter 3.4
Check TXVCO (U210)
YES
Refer t o chapter 3.6.1
GSM/DCS/PCS
YES
Tx is OK
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