LG Nexus 5 Service Manual
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3. TROUBLE SHOOTING - 131 -Copyright © 2013 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only Rx Path BOT 3.7.4 WIFI/BT Signal Path_Rx U13000 U13001 U13002FL13001 2.4G5G FL13000 ANT X13000 ANT Matching
3. TROUBLE SHOOTING - 132 -Copyright © 2013 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only Checking WIFI_BT START ANT 13001 Check The Connection Between Antenna and Clip Check antenna RF Line at R130013/C13046/C13000 Check RF Line 2.4G Component C13012/FL13001/C13011 L13010/C13009 Check RF Line 5G Component C13060/C13059 Check U13001 ChecK U13002 Replace Antenna in Battery Cover or Clip Check The Component Around Antenna Check The Component 2.4G RF Line Component Check the Component 5G RF Line Component Replace U13001 For 2.4Ghz Replace U13002 For 5Ghz No No No No No No Yes Yes Yes Yes Yes Yes Main Board Change
3. TROUBLE SHOOTING - 133 -Copyright © 2013 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only 3.8 Audio troubleshooting 3.8.1 Speaker troubleshooting It’s trouble shooting guide for no sound case. Speaker control signals are generate by MSM8974(U3000), WCD9320(U10000). START Check the Speaker Module And reconnect Speaker Module Yes Yes Yes Yes Yes Yes No No No No No No Speaker Sound is OK? Change the WCD9320(U10000) Is Speaker Sound OK? END END END END END END Change The main PCB Change the Speaker Module. Is Speaker Sound OK? Check the c-clip for Speaker Module Is Speaker Sound OK? Check Lower FPCB part(L16000,L16001) Is Speaker Sound OK? Check the Lower FPCB Is Speaker Sound OK?
3. TROUBLE SHOOTING - 134 -Copyright © 2013 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only LGE Internal Use Only Speaker Module D16006 DNI D16007 DNI ANT16000 MBV62562001FEED ANT16001 MBV62562001FEED20n L16001 L16000 20nSPK_P SPK_N 5/8 RevD => RevE Enhanced FSD, 2.8T, Module Rev10 (0717) => BOM Updated DNI SPEAKER L16000 L16001
3. TROUBLE SHOOTING - 135 -Copyright © 2013 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only TOP WCD9320 LGE Internal Use Only LGE Internal Use Only C-Clip ANT L16000 L16001
3. TROUBLE SHOOTING - 136 -Copyright © 2013 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only 3.8.2 Receiver troubleshooting Receiver control signals are generate by MSM8974(U3000), WCD9320(U10000) Voice Receiving path as below : MSM8974 -> WCD9320 -> EAROP / EARON -> Receiver START Check the Receiver Sound. (loop back mode) Yes Yes Yes Yes Yes No No No No No Is receiver sound OK? Change the WCD9320(U10000) Is receiver Sound OK? END END END END END Change The main PCB Change the receiver. Is receiver Sound OK? Check the Contact of receiver. Is receiver Sound OK? Check Main PCB inductor(L10001,L10002) Is receiver Sound OK?
3. TROUBLE SHOOTING - 137 -Copyright © 2013 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only LGE Internal Use Only Check receiver contact TOP WCD9320 L10001 L10002D10004 D10005
3. TROUBLE SHOOTING - 138 -Copyright © 2013 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only In case of No Receiver sound, not only Receiver fault but MIC fault. You must check the voice recording test first. After voice recording, if you could hear the recorded sound, It is nor MIC fault And receiver path or parts is something wrong. D10004 SEVY0008101 EVLC5S01033 L10001 20n L1000220n C10029 DNIC10030 DNI CN10000 EAB62910801KR-1307-WB1PP 2 1 L10000 DNI D10005 RCV_M RCV_P Change Vendor : revB -> revC (0531) RevC->Rev10 (0628) Change:rev10->rev11(0729) RECEIVER Change:rev10->rev11(0729) L10001 L10002 D10004D10005
3. TROUBLE SHOOTING - 139 -Copyright © 2013 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only 3.8.3 Main MIC troubleshooting A Main MIC is located on Lower FPCB. It operates in case of voice call (handset), voice recording, camcorder recording START Check the MIC signal by receiver Loop back test Yes Yes Yes Yes Yes Yes No No No No No No Is Speaker sound OK? Change the WCD9320(U10000) Is voice signal ok? END END END END END END Change The main PCB Check the MIC mesh filter, rubber. Is voice signal ok? Check the MIC hole to make clear the voice signal path Is voice signal ok? Change the Main MIC. Is voice signal ok? Check the Lower FPCB Is voice signal ok?
3. TROUBLE SHOOTING - 140 -Copyright © 2013 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only LGE Internal Use Only Main MIC Rubber Mash Filter Main bottom side TOP WCD9320