LG Prada KE850 Service Manual page 107

5. Trouble shooting
5.13.11 Checking Transceiver Output Signals
Checking Points
MODE
GMSK
8PSK
C424
4700p
VRF2V85
R415 10
C434 C435
2.2u 2.2u
R419
C443 0
NA
R425 0
C448 C449
NA NA
R427
0
C454 C455
NA NA
Figure 22. Transceiver Output Circuit
U401
Figure 23. Transceiver Output
Transceiver Output
Fixed
Ramp Burst Control
Table 3. Transceiver Output Operation
- 108 -
FE2
33
VBIAS
34
VDDTX1V5
35
TX1
U404
36
TX2
PMB6272
37
VDDTX2V8
38
VDDMIX2V8 RF Transceive
39
GND3
40
GND4
41