LG KF350 Service Manual page 99

4. TROUBLE SHOOTING
Checking Flow
Figure 26. GSMK Control Signal
LGE Internal Use Only
Check Control Signals
(TP1, TP2, TP3)
Signals are
Normal ?
Yes
PAM Control Signal is
OK.
See next page to check
FEM & Mobile SW Circuit.
TP1(PA LEVEL)
TP2(TXON PA)
TP3(PA MODE)
TP1(PA LEVEL)
TP2(TXON PA)
TP3(PA MODE)
No
PMB8877(U102)
Figure 27. 8PSK Control Signal
TP3(PA MODE) : C418
TP1(PA_LEVEL) : R405
TP3(PA MODE) : C418
TP2(TXON_PA) : C417
TP1(PA_LEVEL) : R405
TP2(TXON_PA) : C417
Copyright © 2008 LG Electronics. Inc. All right reserved.
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Check
TP2(TXON PA)
TP1(PA LEVEL)
TP3(PA MODE)
Only for training and service purposes