LG KG330 Service Manual page 91

4. TROUBLE SHOOTING
5. Checking PAM Circuit
GSM_TX
DCS_PCS_TX
L400
GSM_OUT
8
35dBm
10nH
C402 C403
GND23
32
0.5p 0.5p
GND22
31
GND21
30
GND20
29
GND19
28
GND18
27
GND17
26
L402
DCS_PCS_OUT
9
33dBm
3.9nH
C405 C406
NA 1.5p
VBAT
GSM_IN
7
VRAMP
6
GND
5
U400
VBATT
RF3166
4
TX_ENABLE
3
BAND_SELECT
2
DCS_PCS_IN
1
C407
C408
33u
0.01u
- 92 -
4dB Atten
R400 R401 R402
220 24 220
R405 220
C404
27p
R407 220
R408 220
3dB Atten
R409 R410 R411
300 18 300
C409 C410 C411
3p 18p 10p
RFOL
APC
PA_ON
PA_BAND
RFOH