Checking Rf Rx Block - LG U8500 Service Manual

4.6.5 Checking RF Rx Block

L1027
925-960 MHz
L1028
DCS.RX
PCS.RX
GSM.RX
Test Point (RF Rx Level)
VREG_RFRX_0_2.85V
L1029 5.1nH
L1016
7.5nH
1805-1880 MHz
C1087
1000p
L1017
7.5nH
L1030 5.1nH
10nH
L1014
9.1nH
C1086
1000p
L1015
9.1nH
10nH
Schematic of GSM/DCS/PCS Rx Block
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4. TROUBLE SHOOTING
L1032 3.3nH
L1018
3.6nH
1930-1990 MHz
C1088
1000p
L1019
3.6nH
L1033 3.3nH
VREG_RFTX_2.85V
C1089
0.1u
C1092
R1038
0.1u
29
0
30
31
R1039 32
11K (1%) 33
34
35
36
37
38
R1037
39
40
82
41
C1083 C1085 C1084 (PPS)
42
120p 1000p 22n
C1079
82p
R1036
C1093
33p
CP_HOLD2
CP2
VDDA9
RX_VCO_IN
R_BIAS
GSM1800_INN
GSM1800_INP
VDDA10
GSM900_INP
GSM900_INN
VDDA11
TX_MOD_CP
VDDA12
TX_VCO_FB