3. TROUBLE SHOOTING
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Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
3. TROUBLE SHOOTING
3.1 Checking XO Block
The output frequency(19.2MHz) of XO(X5000) is used as the reference one of WTR2605/WFR2600 and PM8038
internal VCO
U1002
TP1
DNI
L1043
U1002
62
56
4
23
13
51
32
36
43
55
11
2
3
10
12
18
24
49
1
9
5
6
57
58
60
53
22
61
8
7
TX1_OUT
SSBI_RX
RX_BB_IP
PDET_RFFB_IN
GP_DATA0
XO_IN
GP_DATA1
GP_DATA2
TX3_OUT
RX_LB1_IN
RX_MB2_IN
TX2_OUT
RX_BB_QP
DAC_REF
TX_BB_QP
TX_BB_IM
RX_LB2_IN
RX_MB3_IN
TX_BB_IP
GNSS_RF_IN
RX_BB_IM
RX_BB_QM
DNC
GND8
GNSS_BB_IM
RF_ON
TX_BB_QM
RX_MB1_IN
SSBI_TX_GNSS
GNSS_BB_IP
C1007
100p
100p
C1006
100
R1005
DNI
R1003
R1002
DNI
0
R1001
68
R1006
R1007
68
4.7n
L1042
C1093
DNI
WTR0_XO_A0
WTR0_SSBI_TX_GNSS
WTR0_SSBI_RX
WTR0_GPDATA1
WTR0_GPDATA0
WTR0_PRXBB_I_P
WTR0_PRXBB_Q_P
WTR0_TXBB_I_P
WTR0_TXBB_Q_P
WTR0_GPSBB_I_P
WTR0_DAC_IREF
WTR0_RF_ON
WTR0_PRXBB_I_N
WTR0_PRXBB_Q_N
WTR0_TXBB_I_N
WTR0_TXBB_Q_N
WTR0_GPSBB_I_N
GSM_TX
PRX_G1800_G1900_MB3
WTR_GPS_IN
WTR_XO_IN
WTR_XO_IN
WFR_XO_IN
PRX_W850_LB2
PRX_W2100_MB1
PRX_W900_LB1
PRX_W1900_MB2
RF_TX_B1_B8
RF_TX_B2_B5
PDET_IN_WTR2605
TP1 (C1006)
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