LG Nexus 5 Service Manual

3. TROUBLE SHOOTING
- 181 -Copyright © 2013 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only
U5001
U7000
BOT   

3. TROUBLE SHOOTING
- 182 -Copyright © 2013 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only
3.20 Wireless Charging Troubleshooting
When the WLC does not work, the problem comes from WLC antenna, SUB Board or WLC chip itself.
Wireless charging system is not controlled by the main core.
TP1 : Input power from secondary coil : AC 19V(at 100kHz~200kHz)
TP2 : Output power from WLC chip : within 4.8V ~ 5V
TP3 : Antenna itself has about 5.9uH self-inductance...

3. TROUBLE SHOOTING
- 183 -Copyright © 2013 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only
 
LGE  Internal  Use  Only 
 
4.23 Wireless Charging  Troubleshooting  
When the WLC does not work, the problem comes from WLC antenna, SUB Board or WLC chip itself.   
Wireless charging system is not  controlled by the main core.  
TP1 : Input power from secondary coil : AC 19V(at 100kHz~200kHz)  
TP2 : Output power from WLC chip : within 4.8V ~ 5V  
TP3 :...

3. TROUBLE SHOOTING
- 184 -Copyright © 2013 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only
Change Battery Cover Or C-Clip
START
Yes
No
No
No
Yes
Yes
Yes
Charging OK?
Charging OK?
Charging OK?
Is Signal OK?
Change the SUB Board
Charging OK?
Check the Antenna & C-Clip
END
END
END
END   

3. TROUBLE SHOOTING
- 185 -Copyright © 2013 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only
3.21 USB Trouble shooting
The sequence of D821 USB is,
USB connected to D821 -> VBUS_USB_IN(FL16003) goes to 5V -> USB_DATA is triggered -> USB work
USB Trouble shooting is shown below.
Battery voltage higher than 3.2V?
START
Pin 30~35 of CN16000 are about 5V? 
[VBUS_USB_IN_PM]
Pin 11~12 of CN16000 are open?
[USB_HS1_DP/DM SLIM1]]
Pin 11, 12 of CN16000 are USB...

3. TROUBLE SHOOTING
- 186 -Copyright © 2013 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only
CN16000
33 32
34
31
35
30
36
29
37
28
38
27
39
26
40
25
41
24
42
23
43
22
44
21
45
20
46
19
47
18
48
17
49
16
50
15
51
14
52
13
53
12
54
11
55
10
56
9
57
8
58
7
59
6
60
5
61
4
62
3
63
2
64
1
G1
G2
G3
G4
+3V1_VREG_L22
+5V5_DDVDH-5V5_DDVDL
VBUS_USB_IN_PM
+1V8_VREG_LVS3
+2V95_VREG_L16
LCD_PWM
ANT_TUNER_0ANT_TUNER_1
MAIN_MIC_GND
WLED_A
MAIN_MIC_BIAS
SPK_PSPK_N...

3. TROUBLE SHOOTING
- 187 -Copyright © 2013 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only
MIC16000
FB16000
FB16001FL16003
D16010
D16009 D16008
D16001
D16000
C16026
C16025 C16024
C16018
CN1600
2
CN16000  

3. TROUBLE SHOOTING
- 188 -Copyright © 2013 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only
3.22 HDMI Troubleshooting
Check out the setting menu on the phone and then set the proper resolution for the outer display as shown below.
Battery voltage higher than 3.2V?
START
 Pin 30~35 of CN16000 are about 
5V? [VBUS_USB_IN_PM]
TP1(C12012) is 3.3V?
TP2(C12007) is 1.8V?
TP3(C12009) is 1.8V?
TP4(C12001) is 1.0V?
HDMI Data Pin of U12001 is HDMI 
siginal
Charge...

3. TROUBLE SHOOTING
- 189 -Copyright © 2013 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only
U12002
EAN62735301
RP114K101D-TRB
5
3 2
4
1VOUTVDDGNDCEPGND
+1V0_SLIMPORT_CVDD
+1V8_VREG_S3A
20K
R12013
C12016
1u
SLIMPORT_IOVCC_EN
(Slimport)+1V0_SLIMPORT_IOVCC
U12002
FL12000
EAM62451101
ICMEF112P350MFR5
6
3 1
4 2
P2P4P1P3
P6
P5
100K
R12008R1200
5
4.7KR12006 4.7KR120074.7K
D12000
R12004
12K
C120070.1uC12006
1u
0.1u C12012
0.1u
C12009C12008
1uC12001...

3. TROUBLE SHOOTING
- 190 -Copyright © 2013 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only
TOP
R1200120K+1V8_VREG_S3A
1u
C12010
RP114K331D-TRB
U12000
EAN627687015
3 2
4
1VOUTVDD
GNDCE
PGND
VREG_BOOST_BYPASS
SLIMPORT_AVDD33_EN
AVDD33
0.3mm
U12000
U3000
U12002U12000
U12001
TP3(C12009)
TP2(C12007)
TP4(C12001)
TP1(C12012)