LG KF350 Service Manual page 98

4.14.5. Checking PAM Control Signals
Checking Points
TP2(TXON PA)
TP1(PA LEVEL)
TP3(PA MODE)
MODE
MODE
GMSK
8PSK
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Only for training and service purposes
TP2(TXON PA)
R405
C416 C417 C412
47p 100p 100p
Figure 24. PAM Control Signals
Figure 25. Transceiver Output
MO DE
MODE PA_LEVEL
LOW Ramp Burst Control
HIGH Control Amp bias
Table 4. PAM Mode Operation
- 99 -
4. TROUBLE SHOOTING
TXON_PA
10K
PA_LEVEL
TP1(PA LEVEL)
PA_BAND
TP3(PA_MODE)
PA_MODE
HBAND_PAM_IN
C418
100p
PA_LEVEL
TXON_PA
HIGH
HIGH
TXON_PA
LGE Internal Use Only