LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 108 -
4.6.4 Checking PAM Block
PAM Control Signal
TP1. GSM_PA_RAMP : Power Amp Gain Control. typically, 0.5V < Vapc <
2.6V,
TP2. GSM_PA_EN : Power Amp Enable
(Power ON : higher than 2.5V , Power OFF : lower than 0.7V)
TP3. +VPWR : PAM Supply Voltage Vcc higher than 3.28V
(1%)
C531
33p
VBATT
R523
270
2.2K
R506
R524
51
C544
100p
C536
68p
C530
33p
R521
220
L522
18nH
0
R513
15
R518
15
R516
220
R520
10
GND3
11
GND4
GND5
13
GND6
14
GND7
16
17
GND8
7
GSM_IN
9
GSM_OUT
TX_EN
3
4
VBATT
VCC
12
6
VRAMP
TQM7M5003
U501
2
BS
DCS_PCS_IN
1
DCS_PCS_OUT
15
GND1
5
GND2
8
R511
0
L524
1.5nH
270
R522
22u
C543
GSM_PA_EN
GSM_PA_BAND
GSM_PA_RAMP
TP1
TP3
TP2
Summary of Contents for KS10
Page 1: ...Date July 2007 Issue 1 0 Service Manual Model KS10 Service Manual KS10 Internal Use Only ...
Page 246: ...Note ...
Page 247: ...Note ...