LG KE600 - Cell Phone Service Manual page 111

5. Trouble shooting
5.15.11 Checking Transceiver Output Signals
1V5_RF
C622
0.1u
LBAND_PAM_IN
HBAND_PAM_IN
Figure 22. Transceiver Output Circuit
Checking Points
U601
U60
Figure 23. Transceiver
MODE Transceiver Output
GSMK Fixed
8PSK Ramp Burst Control
Table 3. Transceiver Output Operation
2V85_RF
2V85_RF
C623
0.1u
FE2
33
VBIAS
34
VDDTX1V5
35
TX1
36
TX2
37
VDDTX2V8
R617 10
38
VDDMIX2V8
39
GND3
40
GND4
41
C630 C631
0.1u 0.1u
LBAND PAM IN
HBAND PAM IN (DCS/PCS)
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U6
PMB