- 162 -
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
D. GSM PAM Check
Figure 4-26. Test points of GSM850/EGSM/DCS/PCS Tx
GSM/EDGE
PAM
(+Ant. SW)
(Top)
(Bottom)
TP04
GSM850/EGSM/DCS/PCS
PAM Output
④
(C122)
TP04
GSM850/EGSM/DCS
/PCS PAM Output
④
(C122)
TP03
Vapc
③
(U102 pin 4)
TP03
Vapc
③
(U102 pin 4)
1.1
27p
C122
DNI
sm
d
_0603h
_25
_r_na
R106
34
PGND4
RSVD
10
RX1
16
15
RX2
RX3
14
13
RX4
4
VAPC
VBATT
5
WCDMA1
18
19
WCDMA2
WCDMA3
20
_TXEN
8
29
GND12
GND13
30
11
GND2
GND3
12
21
GND4
GND5
22
23
GND6
GND7
24
25
GND8
GND9
26
1
HB_RF_IN
LB_RF_IN
3
9
MODE
31
PGND1
32
PGND2
PGND3
33
SKY77521
U102
17
ANT
BS1
7
6
BS2
2
GND1
27
GND10
GND11
28
R180
51
TP03
Vapc
③
(U102 pin 4)
TP04
GSM850/EGSM/DCS
/PCS PAM Output
④
(C122)