Checking Umts Block - LG L704I Service Manual

4.4. Checking UMTS Block

4.4.1. Checking TX POWER of UMTS2100MHz
TP2
TP1
TP4
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
TP3
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4. TROUBLE SHOOTING
C1400 56p
56nH
L14
FL34
LMSP54MA-543
14
VC1
15
VC2
16
VC3
13
VDD
1
GND1
2
GND2
4
GND3
5
GND4
8
GND5
10
GND6
12
GND7
17
GND8
18
GND9
TP1: C1471
TP4: L2002
L44
C1471
NA
0.75p
AWT6277R
11
GND5
10
VCC2
9
GND4
417
8
PWR_DET RFOUT
7
5 GND3 VMODE
6
GND2
100ohm 0603
39p
WCDMA_2100
TP2: L64
TP3: C1400
19
GSM900_RX1
20
GSM900_RX2
21
GSM1800_RX1
22
GSM1800_RX2
23
GSM1900_RX1
24
GSM1900_RX2
3
GSM1800_1900TX
6
GSM900TX
7
UMTS2
9
UMTS1
25
PIN_DIREC1
26
PIN_DIREC2
SFAY0008901
C1701 C1703 C1702
4.7u
0.01u 120p
U578
1
VCC1
2
RFIN
3
GND1
4
5 NA
VREF
L45
C2001 39p C1377
L64
2.2nH
0.5p
L15
C2002
5.6nH
LGE Internal Use Only