LG Nexus 5 Service Manual
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Page 41
3. TROUBLE SHOOTING - 41 -Copyright © 2013 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only BOT U1000 Separator TP2 TP1 3.4.2 U1000 (Low Band) Check the supply voltage and control level for FL1018/U1000 EAT61914101 U1000 RF1492A 21 20 7 8 6 9 5 10 4 3 11 2 12 1 19 18 17 16 15 14 13 TRX1NC2NC3NC4GND2TXHBTXLB ANT TRX2 NC1 TRX3 TRX6TRX5 SCLK TRX4 SDATA GND1 VIOVDD GND3GND4 10p C1023 R1015 0 +1V8_VREG_S3A_RF+2V95_VREG_L16 L1013 DNI C1016 33p R1016 0 100p...
Page 42
3. TROUBLE SHOOTING - 42 -Copyright © 2013 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only Check TP1 TP1 > 2.95V Check the Power ON No Yes Check TP2 TP2 > 1.8V TP3 Signal? Check the PM8941 Check the FL1018 Check the U1000 No No Yes Yes Check TP3 RF Path Open
Page 43
3. TROUBLE SHOOTING - 43 -Copyright © 2013 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only 3.5 Checking RF Block START Check XO (19.2MHz) Block Refer to 4.3 Check the FL1018/U1000 Refer to 3.4 Check Tx/ Rx Level Re-Download & Cal. Change the Board
Page 44
3. TROUBLE SHOOTING - 44 -Copyright © 2013 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only BOTTOP 3.5.1 Checking XO (19.2MHz) Block Refer to 3.3 3.5.2 Checking the FL1018/ U1000 Refer to 3.4 3.5.3 Checking RF TX Level 3.5.3.1 WCDMA, LTE B1 TP1 TP3 TP2
Page 45
3. TROUBLE SHOOTING - 45 -Copyright © 2013 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only C1114100pEAG63293301 20549-001E SW1003 4 3 2 1 ANTCOMMON G3G4 22p C1071 W_FL2-R-SMT-1_80 SW1002 EAG63412001 G1 G2ANTG3 ECA30240001 FL1014 LDJ18829M24AD011 IN 1 Termination_Port 4GND1 2GND2 5OUT 3 Coupling 6 L1048 100n R1011 49.9 DNI L107 3 L1074 DNI TRX_ANT2 CPL_CPL 13.04.25 changed L1001 12n C1102100p1 2 C1018 33p33p C1020C1017 33p L1014 DNIEAM62691501 FL1002...
Page 46
3. TROUBLE SHOOTING - 46 -Copyright © 2013 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only First, Check the conducted Max. Power using the RF Connector Check the FL1018 Check TP1 Over 21 dBm?RF TX Level is OK Yes No Check U2004 (WTR1605L) Check TP2 Over 21 dBm?Check FL1007 (B1 Duplexer) Yes No Check TP3 Over -3 dBm?Check U1001(PAM) Yes No
Page 47
3. TROUBLE SHOOTING - 47 -Copyright © 2013 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only BOTTOP 3.5.3.2 WCDMA B2 TP1 TP3 TP2
Page 48
3. TROUBLE SHOOTING - 48 -Copyright © 2013 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only C1114100pEAG63293301 20549-001E SW1003 4 3 2 1 ANTCOMMON G3G4 22p C1071 W_FL2-R-SMT-1_80 SW1002 EAG63412001 G1 G2ANTG3 ECA30240001 FL1014 LDJ18829M24AD011 IN 1 Termination_Port 4GND1 2GND2 5OUT 3 Coupling 6 L1048 100n R1011 49.9 DNI L107 3 L1074 DNI TRX_ANT2 CPL_CPL 13.04.25 changed TP1 L1001 12n C1102100p1 2 C1018 33p33p C1020C1017 33p L1014 DNIEAM62691501...
Page 49
3. TROUBLE SHOOTING - 49 -Copyright © 2013 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only Check the FL1018 Check TP1 Over 21 dBm?RF TX Level is OK Yes No Check U2004 (WTR1605L) Check TP2 Over 21 dBm?Check FL1008 (B2 Duplexer) Yes No Check TP3 Over -3 dBm?Check U1001(PAM) Yes No
Page 50
3. TROUBLE SHOOTING - 50 -Copyright © 2013 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only BOTTOP 3.5.3.3 WCDMA B4 TP1 TP3 TP2