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4.6.5 Checking RF Rx Block
L507
5.1nH
DCS Band Rx
L508
7.5nH
1805-1880 MHz
L511
L513
7.5nH
5.1nH
L516
10nH
GSM Band Rx
925-960 MHz
L520
10nH
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
C514
VREG_RFTX_2.85V
1000p
L517
9.1nH
C527
CP2_OUT
1000p
L519
UHF_LO_BUFF
9.1nH
4. TROUBLE SHOOTING
L500
3.3nH
L510
3.3nH
FB500
C515
33p
R501
(1%)
C521
4.3K
(change to 4.53k)
680p
C525
0.01u
C526
6.8n
ECHU1C682JX5
(1%)
R503
11.3K
R507 100
(1%)
(1%)
R508
0
- 109 -
PCS Band Rx
1930-1990 MHz
L501
3.6nH
C504
1000p
L505
3.6nH
C508
33p
C516
33p
CP_HOLD2
29
CP2
30
VDDA9
31
RX_VCO_IN
32
R_BIAS
33
GSM1800_INN
34
GSM1800_INP
RTR6250D
35
U500
VDDA10
36
GSM900_INP
37
GSM900_INN
38
VDDA11
39
LGE Internal Use Only
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