LG Nexus 5 Service Manual

3. TROUBLE SHOOTING
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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...

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...

3. TROUBLE SHOOTING
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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...

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...

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...

3. TROUBLE SHOOTING
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LGE  Internal  Use  Only 
 
 
 
Main MIC
Rubber
Mash Filter
Main bottom side
TOP
WCD9320