LG Nexus 5 Service Manual

3. TROUBLE SHOOTING
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Main MIC
C16024DNIC1602633p
33p
C1602 5
1800
FB16000
1800
FB16001
D1601
0D16008D16009
MIC16000
GOERTEK
-42DB 150OHM OMNI 1.5 TO 3.6V 3.10 * 2.5 * 1.1T
4
3
2
1P
G1G2O
MAIN_MIC_GND
MAIN_MIC_BIAS
MAIN_MIC_P
Main MIC
RevH => Rev10 (0702)
MEMS, Top Type, Wide Band   

3. TROUBLE SHOOTING
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3.8.4 SUB MIC troubleshooting
A sub MIC is located on Main PCB.
It operates in case of voice call (Speaker phone).
START
Check the MIC signal by  
Speaker Loop back test 
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
Is Speaker sound OK?
Change the WCD9320(U10000)
Is receiver Sound OK?
END
END
END
END
END
Change The main PCB
Check the MIC mesh filter, rubber. 
Is voice...

3. TROUBLE SHOOTING
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LGE  Internal  Use  Only 
 
 
 
 
Sub MIC Rubber
Front Assembly
TOP
WCD9320
Sub mic(MIC10000)   

3. TROUBLE SHOOTING
- 144 -Copyright © 2013 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only
MIC10000
GOERTEK
-42DB 150OHM OMNI 1.5 TO 3.6V 3.10 * 2.5 * 1.1T
4
3
2
1P
G1
G2
O
D10001
UCLAMP0541Z EAH61693001
D10002D1000
3
C10024 33p
FB10004 1800
C1002333p
1800
FB10005
SUB_MIC1_GND
SUB_MIC1_BIAS
SUB_MIC1_P
RevC->Rev10 (0628)
Sub_MIC1
'13.03.18
Sub mic(MIC10000)   

3. TROUBLE SHOOTING
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3.8.5 Ear-MIC troubleshooting
Ear MIC control signals are generate by MSM8974(U3000), WCD9320(U10000), FSA8008UMX(U7001).
Case A. Unable detection of headset insert.
START
Didn’t display headset icon and did play sound via 
Speaker although headset insert
Yes
Yes
Yes
No
No
No
Check the left signal and  
detection line short when headset 
inserted?
Change the...

3. TROUBLE SHOOTING
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LGE  Internal  Use  Only 
 
 
 
Check detection is okay
TOP
WCD9320   

3. TROUBLE SHOOTING
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BOT
EAR_Detect(Test Point)
HPH_L(Test Point)
C10001 100p
R10038 8.2
0
R1003
4
R10037 8.2
C10000100pC1000 2 10nD10007
EAH61995401
RClamp0521Z.TN TD10008ZD10003D10006
J10000
EAG63511001 HG05-AB3590
S/W_Detect
SPK_L
SPK_R
MIC GNDFB10001
1800
FB100021800
DNI
R10031
FB10000 1800
R10005
10KR10004 10K
EJ_MICHPH_REF
HPH_LHPH_R
EARJACK_DETECT
revA->revB(04.22)...

3. TROUBLE SHOOTING
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Case B. No Sound from Ear-mic
START
Check the Mic signal by Voice recording.
Yes
Yes
Yes
No
No
No
Check parts about Mic Bias(1.8V)
works well ?
Change the WCD9320(U10000)
Is receiver Sound OK?
END
END
END
Change The main PCB
Check the touch FPCB
Mic is OK?   

3. TROUBLE SHOOTING
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TOP
Mic Bisa(Test Point)
C10001 100p
R10038 8.2
0
R1003
4
R10037 8.2
C10000100pC1000 2 10nD10007
EAH61995401
RClamp0521Z.TN TD10008ZD10003D10006
J10000
EAG63511001 HG05-AB3590
S/W_Detect
SPK_L
SPK_R
MIC GNDFB10001
1800
FB100021800
DNI
R10031
FB10000 1800
R10005
10KR10004 10K
EJ_MICHPH_REF
HPH_LHPH_R
EARJACK_DETECT
revA->revB(04.22)
Delete:revB->revC(0603)...

3. TROUBLE SHOOTING
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3.9 Camera
3.9.1 8M OIS Camera Trouble Shooting
8M OIS camera control signals are generated by MSM8974
Disconnect and reconnect camera 
connector (CN9000)
Yes
Yes
No
No
No
No
START
TP1 : 1.2V
TP2, TP3 : 1.8V
TP4 : 2.7V
TP5, TP6 : 2.8V
Camera is OK?
Camera is OK?
TP7 : 19.2MHz
END
Change the Main Board
Change the Camera module
END
Yes
Yes