LG GT350 - Page 100

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4. TROUBLE SHOOTING
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Figure 26. GSMK Control Signal
Figure 27. 8PSK Control Signal
Check Control Signals
(TP1, TP2, TP3)
TP3(PA MODE) : R608
TP1(PA_LEVEL) : R606
TP2(TXON_PA) : R605
TP1(PA_LEVEL)
TP2(TXON_PA)
TP3(PA MODE)
TP1(PA_LEVEL)
TP2(TXON_PA)
TP3(PA MODE)
TP1(PA_LEVEL)
TP2(TXON_PA)
TP3(PA MODE)
Signals are
Normal ?
Check
PMB8877(U100)
Yes
No
PAM Control Signal is OK.
See next page to check
FEM & Mobile SW Circuit.
Checking Flow