LG GD910 - Page 98

- 99 -
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
5. Trouble shooting
GD910 service manual
Checking Points
UMTS3
VC1
3
VC2
4
VC3
5 6
VC4
7
VDD
GND2
8
GND3
23
GND4
24
GND5
GSM1800_1900TX
9
GSM1800_RX1
16
17
GSM1800_RX2
GSM1900_RX1
18
19
GSM1900_RX2
11
GSM850_900TX
GSM850_RX1
12
13
GSM850_RX2
14
GSM900_RX1
15
GSM900_RX2
UMTS1
20
UMTS2
21
22
LMSP43QL-771
FL400
ANT
2
GND1
1
10
C440
0.1u
SW400
MM8130-2600
G1G2
G3 G4
INOUT
1800FB401
1800FB402
C439
1000 pF
2V85_VRF
100p
C405
L426
NA
C517
DNI
L414
2.7nH
82nH
L428
1.5nH
L413
4
5
GND3 GND4
7
GND5
8
GND6
9
1
RX
TX
3
FL402
SAYFP1G95AA0B00
ANT
6
GND1
2
GND2
BC2 : SAFEB1G96FL0F00
BC1 : SAFEB2G14FA0F00
4.3nHL419
DNI
C473
C474
100p
C475
10n
12pF
C504
3
7
PGND
RFIN
1
RFOUT
6
RREF
5
VCC
4
BGA711L7
U406
EN
2
GS
C469 10p
2V85_VRF
27K
R411
47pF
C471
4.3nHL420
1.5nH
L415
G1
2
5
G2
IN
1
O1
3
O2
4
SAFEB2G14FA0F00
FL403
L425
2nH
DNI
C498
TP2
TP1
TP3
TP4
TP5