LG HB620 Service Manual page 121

4. TROUBLE SHOOTING
If GSM over 31 dBm?
If DCS/PCS over 28dBm?
If TP2 over 29dBm?
If TP3 over 25dBm?
Check PAM Block OK ?
Refer to chapter 3.6.3
Check Soldering of PAM (U101)
If problem still exist,
LGE Internal Use Only
START
Check TP 1
No
Check TP 2, TP3
No
No
replace the PAM
Problem resolved ?
No
Change the Board
- 122 -
Yes
GSM/DCS/PCS Tx is OK
Check other part
Check Front - End
Yes
Module
Refer to chapter 3.4
Yes
Check the RTR 6275
Yes
GSM/DCS/PCS Tx is OK
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