Moto G 2nd Generation
TROUBLESHOOTING GUIDES
© 2009 Motorola Proprietary & Confidential
May 27, 2014
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TABLE OF CONTENTS
1. Snapshots of Antennas …………………………………………………………………… 3
2. Snapshots of Main Board ……………………………………………………………….... 5
3. Charging Troubleshooting ………………………………………………………………... 9
4. ALS/Proximity Sensor/LED/SD/SIM Troubleshooting ……………………..…………. 12
5. Touch/Display Troubleshooting …………………………………………………………. 19
6. Camera Troubleshooting ………………………………………………………………… 27
7. Vibrator and Sensors Troubleshooting ………………………………………………… 34
8. Audio Troubleshooting …………………………………………………………………… 39
9. Key Troubleshooting ……………………………………………………………………… 50
10. WCDMA/GSM Troubleshooting………………………………………………………… 53
11. WLAN / BT / FM Troubleshooting……………………………………………………… 120
12. DTV Troubleshooting……………………………………………………………………. 141
13. GPS Troubleshooting……………………………………………………………………. 153
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SNAPSHOTS OF ANTENNAS
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Antenna and Antenna Feed Locations
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SNAPSHOTS OF MAIN BOARD
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Snapshots of Main PCB – Top and Bottom
Top Side
(Battery side)
Bottom Side
(Display side)
Second Mic
Vibrator
USB connector
Front camera
SD card
connector
SIM1 connector
SIM2 connector
Rear camera
Audio jack
Battery connector
LCM and TP connector
Primary MIC
Flash light
Indicator LED
P+ALS sensor
Side Key
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Main Board – Top Placement
eMMC
LPDDR(PO
P)+
MSM8x26
PMIC
2nd MIC
Audio
Jack
Rear
C
a
m
CNT
Power
up
key
Volume
up
key
Volume
down
key
Flash
driver IC
LCM bias IC
Backlight
driver IC
RCV/
S
P
K
switch
Top SPK
AMP
Audio
codec
Gyro
sensor
19.2MHz
Rear
C
a
m
2.8V
power
Front cam
2.8V power
Rear Cam 1.8V power
LCM IO power
Blank Flash
Bottom
SPK
AMP
Hall sensor
USB
C
N
T
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Main Board – Bottom Placement
LCM
connecto
r
Bottom SPK
contact
Primary
ANT
Primary
MIC
TP 3.1V pwr
G+E
com
pass
sensor
Coupler
700-2700MH
z
Ant switch
SAW filter
1842.5/1960MHz
Duplexer B2
1850-1990MHz
Duplexer
WCDMA B1
Duplexer B26
Duplexer B8
B2/B5 PA
B1/B8 PA
WiFi/BT/
FM
WiFi Ant
SAW filter
2450MHz
QFE11
0
1
SIM/SD/
Flash light/
Vibrator CNT
Front cam CNT
P+ALS
senso
r/
Indicator CNT
TOP SPK
contact
WTR 2605
SAW GPS
1575.42MHz
DTV
SAW 836.5MHz
DTV module
27MHz
WFR2600
SAW 2140MHz
WFR SP4T
GPS LNA
BAT CNT
GPS ANT
GPS
SAW
1575.42
MHz
Diversity ANT
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CHARGING
TROUBLESHOOTING
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Charge path: USB connector CON1001 pin 1-> U1001 (pin 161, 172) ->
U1001 (pin 162) -> U1001 (pin 143,155) -> U1001 (pin 154,166) -> L1001 ->
U1001 (pin 152, 164) -> U1001 (pin 139, 151, 163) -> R1008 ->
CON1002 (pin 4)
TP10021TP1003
1
TP1001
1
VREF_BAT_THM
VBUS
TP1004
1
R1004
2.2K/+-1%
VBAT_THERM
R1002 0R/+-5%
R1003 0R/+-5%
VPH_PWR
C1005 47uF
BAT_THERM
CON1001
UB012-04413A01
1
1
2
2
3
3
4
4
5
5
667
7
889
9
C1001
DUMM Y_C_0603
VCOIN
VPRE_BYP
USB_DP
USB_DM
BMS_CSM
C1008 100nF
VDRV_P
C1006 10nF
OVP_CP_DRV
VCHG
USB_ID
VBATT
C1004
1uF
0603
R1001
R1006
47K/+-5%
0201_m03
L1001 1uH
VSW_CHG
C1012
4.7uF
C1009
10uF
C1007 100nF
C1010
4.7uF
C1013
4.7uF
C1016
DUMMY_C_0402
C1011
100nF
R1005
14.3K
VCHG
USB
ESD1003
ESD7951ST5G
1
1
2
2
ESD1004
ESD7951ST5G
1
1
2
2
ESD1001
TVM0G360M300R
12
USB_DP_CON
USB_DM_CON
ESD1002
AOZ8231ADI-12
1 2
USB_ID
C1002
DUMMY_C_0201
C1003
DUMMY_C_0201
CHARGING
U1001-2
PM-8226-0-172WLNSP-TR-07-1-VV
LED_CHG
168
USB_IN_1
161
USB_IN_2
172
USB_ID_I N
97
OVP_CP_DRV
171
OVP_OUT
162
VDRV_P
167
VBAT_SNS
156
VBAT_1
139
VBAT_2
151
VBAT_3
163
VCHG_1
143
VCHG_2
155
GND_CH G_HP_1
153
GND_CH G_HP_2
165
BATFET_CP_DRV
140
VREF_BAT_THM
169
VCOIN
76
VPRE_BYP
170
VSW_CHG_1
154
VSW_CHG_2
166
VPH_PWR_1
152
VPH_PWR_2
164
GND_OVP
110
GND_CH G
142
GND_CH G_PSUB
109
GND_DR V
65
GND1
92
GND2
64
GND3
74
GND4
75
GND5
86
GND6
87
GND7
98
GND8
99
BAT_THERM
ESD1005
ESD9B5.0ST5G
2
2
1
1
TP1006
1
VBATT
R1008
10m/+-1%
BMS_CSM
BMS_CSP
Place&as &close&to&PMIC&
as&poss ible.
BAT_ID
VREF_BAT_THM
R1009
100K/+-1%
0201_m03
C1015
47uF
0805_m095
C1014
47uF
0805_m095
TP1008
*TP50*
1
TP1007
*TP50*
1
BATTERY'C ONNE COT
CON1002
201-C0800-00414
1
1
2
2
3
3
4
4
5
5
6
6
TP1005
1
ESD1006
ESD9B5.0ST5G
2
2
1
1
Charging Troubleshooting
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In the event of charging issues, check charging voltages along the charging path:
● Check the battery is inserted the CON1002 or not
● Check battery ID voltage at TP1006 about 1V
● Check thermistor voltage at TP1005 about 0.63V
● Measure USB_PWR charger input voltage at TP1004. The voltage should
be between 4.75V~5.25V.
● Measure VCHG voltage at C1012. The voltage should be lower the
USB_PWR.
● Check battery voltage at CON1002 pin4. It should be 4.35V or lower. If
battery is 2.1 or 0, there maybe a short in the circuit somewhere. The battery
fault safe circuit is triggered.
Charging Troubleshooting
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ALS + PROXIMITY SENSOR/
INDICATOR LED/
MICRO-SD/
MICRO-SIM/
TROUBLESHOOTING
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ALS + Proximity sensor
• ALS + proximity sensor are built into U101
• MSM8226 U401 uses I2C bus to communicate to U101
I2C address: 0x48
PROXIMITY_IN T
LEDA
C101
4.7uF
C102
1uF
R102 0R/+-5%
R103 22R/+-5%
U101
STK3310
SDA
1
/INT
2
LDR
3
NC
4
LEDA
5
GND
6
SCL
7
VDD
8
SENSORS_I2C_SCL
ESD102
AZ5A25-01F. R7G
1 2
ESD104
AZ5A25-01F. R7G
1 2
VREG_L19_2P85
ESD101
AZ5A25-01F. R7G
1 2
VDD
ESD103
AZ5A25-01F. R7G
1 2
SENSORS_I2C_SDA
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sensor wrong reading
• Check I2C bus activities during ALS + proximity sensor access
(SENSORS_I2C_SDA, SENSORS_I2C_SCL)
• Check CON101 on ALS + Proximity sensor FPC and CON2101 on phone
board are corrected soldering
In the event of ALS + proximity sensor issue at phone level:
• Check for missing/missed alignment of rubber seal
• Missing/missed alignment of rubber seal can cause ALS + proximity
sensor wrong reading
ALS + Proximity sensor (cont.)
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Indicator LED
+
-
LED102
16-213/T3D-C P2Q2TY/ 3T
12
WLED_SINK
VPH_PW R
ESD105
AZ5A25-01F .R 7G
1 2
• Status white LEDs is driven by U1001 PM8226 MPP_4 (pin 157)
In the event of white status LED issue:
• Check voltage at LED Anode (pin 2) and Cathode (pin 1) of LED102
• LED Anode voltage = VPH_PWR and Cathode voltage = VPH_PWR –
In the event of white status LED issue:
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Micro-SD
• uSD connector is operated with its own power, detection and SDC bus
interface
In the event of uSD issue:
• Do a through visual check on uSD connector CON103 for any sign of
mechanical contact issues
• Insert uSD and detected SD_CARD_DET_N=low at TP1711
• Check the voltage VREG_L18_2P95 at TP1712 on board level
• Check uSD bus interface signal activities during uSD access (SDC_CLK,
SDC_CMD, uSD_DATA)
C110
1uF
VREG_L18_2P95
MICRO SD CARD CONNECTOR
CON103
5040771891
DATA2
1
CD/DAT3
2
CMD
3
VDD
4
CLK
5
VSS
6
DAT0
7
DAT1
8
14
14
13
13
9
9
10
10
11
11
12
12
DETECT SWITCH TERM
15
DETEC T LEVER TER M
16
C109
SD_CAR D_DET_N
ESD105
TEA10402V05A0
12
ESD106
TEA10402V05A0
12
ESD107
TEA10402V05A0
12
ESD108
TEA10402V05A0
12
ESD109
TEA10402V05A0
12
ESD110
TEA10402V05A0
12
SDC2_D ATA_0
SDC2_D ATA_1
SDC2_C LK
SDC2_C MD
SDC2_D ATA_3
SDC2_D ATA_2
ESD111
TVM0G100M 010R
12
ESD112
TVM0G100M 010R
12
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• Depending on the PCB board variant, there are up to 2 SIM connectors on
PCB board
• Each SIM connector is operated independently with its own power,
detection and SIM bus interface
SIM
ESD103
AOZ8235DI
CH1
1
VN
2
CH23CH3
4
CH4
5
CH5
6
Sim Det
Sim card
Not InsertInsert
0V(GND)1.8VVoltage
Level
UIM1_DETECT
UIM1_DATA
SIM1 CARD CONNECTOR
VREG_L22_UIM1_VPP
UIM1_DATA
VREG_L22_UIM1
UIM1_RST
UIM1_CLK
C101
100nF
VREG_L22_UIM1
C102
C107
UIM1_RST
UIM1_CLK
CON101
SF56S006V4A
Vcc
C1
RST
C2
CLK
C3
GND
C5
Vpp
C6
I/O
C7
HD1
HD1
HD3
HD3
HD4
HD4
DSW2
DSW2
HD2_D SW1
HD2_D SW1
UIM1_DETECT
CON102
SF56S006V4A
Vcc
C1
RST
C2
CLK
C3
GND
C5
Vpp
C6
I/O
C7
HD1
HD1
HD3
HD3
HD4
HD4
DSW2
DSW2
HD2_D SW1
HD2_D SW1
ESD104
AOZ8235DI
CH1
1
VN
2
CH23CH3
4
CH4
5
CH5
6
UIM2_DETECT
C103
100nF
VREG_L23_UIM2
UIM2_DATA
UIM2_RST
C108
C104
SIM2 CARD CONNECTOR
UIM2_CLK
VREG_L23_UIM2
UIM2_DATAUIM2_DETECT
UIM2_CLK
UIM2_RST
VREG_L23_UIM2
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In the event of SIM issue:
• Do a through visual check on SIM connector CON101/CON102 for any
sign of mechanical contact issues
• Check SIM power at TP1701/ TP1714 and SIM card detection signal
TP1705/ TP1718 (active HIGH when SIM card is inserted)
• Check SIM bus interface signal activities during SIM access
(UIMx_RST, UIMx_CLK, UIMx_DATA)
SIM (cont.)
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TOUCH AND DISPLAY
TROUBLESHOOTING
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Module Shape
Receiver/Top speaker
Bottom speaker
LCM+ TP FLEX
TP Driver IC
PIN1
PIN41
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Assembly
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Schematic on Touch Panel Connector
LCM/TP CONNECTOR
VREG_L15_3P1
V_TP_AVDD
VREG_LVS1_1P8
TP_INT_N
R1808
100K/+-5%
TP_I2C_SCL
ESD1818
AZ5A25-01F. R7G
1 2
ESD1820
AZ5A25-01F. R7G
1 2
ESD1815
AZ5A25-01F. R7G
1 2
C1814
100nF
C1818
DUMMY_C _0201
C1816
DUMMY_C _0201
TP_RST_N
ESD1819
AZ5A25-01F. R7G
1 2
C1817
DUMMY_C _0201
TP_I2C_SDA
ESD1821
AZ5A25-01F. R7G
1 2
C1821
DUMMY_C _0201
V_TP_DVDD
VREG_LVS1_1P8
C1815
100nF
ESD1816
AZ5A25-01F. R7G
1 2
R1810R1811
CON1801
17
19
19
21
21
23
23
25
25
27
27
29
29
18
20
20
22
22
24
24
26
26
28
28
30
30
313132
32
333334
34
353536
36
373738
38
393940
40
41
41
43
43
V_TP_3P1
R1815
U1804
RP102Z311D -TR-F
VDD
1
CE
2
GND
3
VOUT
4
V_TP_3P1
C1822
1uF
C1823
1uF
VPH_PWR TP_AVDD_EN
TP AVDD POWER
TP_INT_N=1.8V (High)
State change interrupt.
Low when touch event occurs
I2C lines (SCL, SDA) should be
pulled up to 1.8V
TP_RST_N from MSM GPIO_16
TP_AVDD_EN from MSM GPIO_73
Output 3.1V to TP AVDD
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• No touch:
1) Check touch connector and flexes on display flex and board level
connector CON1801
2) Check power supply voltages;
a. V_TP_3P1(C1823 ) = 3.1V
b. VREG_LVS1_1P8 (C1815) = 1.8V
3) Measure INT, RST,I2C signal are correct
Troubleshooting
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ESD1806
TVM0G360M300R
12
LED+
R1804
LED1-
LCD_TE
MIPI_DSI0_LAN E3_M_1
MIPI_DSI0_LAN E2_M_1
MIPI_DSI0_LAN E1_P_1
MIPI_DSI0_C LK_M_1
MIPI_DSI0_LAN E0_P_1
ESD1813
AZ5A25-01F.R 7G
1 2
PWM_LED
DISP_RESET_N
ESD1811
AZ5A25-01F.R 7G
1 2
LCM_ID0
LCM_VIO
ESD1805
AZ5A25-01F.R 7G
1 2
VREG_L8_1P8
C1806
100nF
C1807
1uF
R1814
LCD_IOVD D
-5P5V
ESD1804
AOZ8231ADI-12
1 2
ESD1822ESD1812
ESD1823
R1803
CON1801
GB3RF411-1101-7H
2
2
1
1
334
4
556
6
7
7
9
9
11
11
13
13
15
15
17
17
19
19
21
21
23
23
25
25
27
27
29
29
8
8
10
10
12
12
14
14
16
16
18
18
20
20
22
22
24
24
26
26
28
28
30
30
313132
32
333334
34
353536
36
373738
38
393940
40
41
41
42
42
43
43
MIPI_DSI0_LAN E3_P_1
MIPI_DSI0_LAN E0_M_1
MIPI_DSI0_LAN E1_M_1
MIPI_DSI0_C LK_P_1
MIPI_DSI0_LAN E2_P_1
+5P5V
ESD1803
AOZ8231ADI-12
1 2
LCM_ID1
ESD1809
LED2-
ESD1810
Schematic on LCM Connector
Reset signal from MSM GPIO25
+-5.5V power to LCM
MIPI interface
Backlight power
Backlight power
Digital I/O power to LCM
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U1802
RP103K181D-TRB
VOUT
1
GND
2
CE
3
VDD
4
GND
5
LCD_I OVDD
C1809
1uF
VPH_PWR
C1808
1uF
R1807
DUMMY_R _0201
LCD_I OVDD_EN
LCM IO POWER
C1811 C1813
DUMMY_C_0402
C1819
DUMMY_C_0402
C1820
DUMMY_C_0402
R1813
10K/+-5%
Back Light IC(Boost)
C1812
1uF
ANODE CATHODE
D1801
CRS13
1 2
L1802 22uH
R1812 100K/+-1%
C1810
4.7uF
U1803
LM3630ATMX
SDA
A1
SCL
A2
SW
A3
HWEN
B1
INTN
B2
GND
B3
PWM
C1
SEL
C2
IN
C3
OVP
D1
ILED2
D2
ILED1
D3
BL_INT_N
BL_I2C_SDA
BL_I2C_SCL
BL_EN
LED1-
VPH_PWR
LED2-
VREG_L6_1P8
LED+
BL_SW
‧ SEL-->VIN
I2C address: 0x38
‧ SEL-->GND
I2C address: 0x36
VREG_L6_1P8
PWM_LED
L1801 4.7uH
C1802
4.7uF
U1801
TPS65132A0YFFR
ENN
A1
OUTN
A2
CFLY 2
A3
ENP
B1
SCL
B2
PGND1
B3
PGND2
E1
VIN
C1
SDA
C2
CFLY 1
C3
SW
D1
AGND
D2
REG1
D3
REG2
E2
OUTP
E3
C1804
4.7uF
C1803
4.7uF
C1805
2.2uF
R1801
DUMMY_R _0201
C1801
4.7uF
R1802
DUMMY_R _0201
BL_I2C_SC L
LCD BIAS_N_EN
LCD BIAS_P_EN
BL_I2C_SD A
+5P5V
-5P5V
VPH_PWR
LCM_SW
Schematic on LCM Power
(+/-5.5V, LED+,LED-,LED2-,LCD_IOVDD)
Troubleshooting Tips:
a. LCD_IOVDD_EN GPIO_10 (R1807)
b. LCD BIAS_P_EN GPIO_12 (R1802)
c. LCD BIAS_N_EN GPIO_13 (R1801)
d. BL_EN GPIO_5 (R1813)
above signal are from MSM when the LCM on,
enable signal should be pull up to 1.8V
e. I2C lines (SCL, SDA) should be pulled up to 1.8V
a
b
c
d
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• No display:
1. Check Backlight Power Supply voltages:
a. LED+ (C1812)
b. LED1- (C1819)
c. LED2- (C1820)
2. Check LCM Power Supply voltages:
a. +5.5V (C1802)
b. -5.5V (C1804)
c. LCD_IOVDD (C1809)
• Check to make sure there is data activity on all MIPI differential pair
lines while display is on (TP1801,TP1802,TP1803,TP1804).
• Check reset line CON1801 pin 22. It should be set high (1.8V) after
power on.
Troubleshooting
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CAMERA TROUBLESHOOTING
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Rear Camera
! The image sensor is a diagonal 5.7 mm (Type 1/3.2) CMOS active pixel type
image sensor with a square pixel array and 8.08M effective pixels.
! The sensor consists of a minimum of 3280 active horizontal pixels and 2464
active vertical pixels.
! This module has an Auto Focus (AF) module with integrated driver (VCM).
! Data interface: (1 pair-clk, 4 pair-data) mobile industry processor interface
(MIPI). I2C is used for control.
! Analog Supply regulator (2.8V) located on Main PCB.
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Rear Camera (cont.)
ESD1911
TVM0G100M 010R
12
ESD1912
TVM0G100M 010R
12
CAM_MCLK0
ESD1913
TVM0G100M 010R
12
C1920
4.7uF
VREG_L5_1P2VREG_L19_2P85
VREG_LVS1_1P8
VREG_L28_2P8
R1903
R1904
V_RCAM_AVDD_2P8
RCAM_DOVD D_1P8
R1901
R1905
C1901
4.7uF
RCAM_MCLK
C1903
4.7uF
C1902
4.7uF
MIPI_CSI 0_LANE0_M_1
MIPI_CSI 0_LANE0_P_1
MIPI_CSI 0_LANE1_P_1
MIPI_CSI 0_LANE1_M_1
MIPI_CSI 0_LANE2_M_1
MIPI_CSI 0_LANE2_P_1
MIPI_CSI 0_CLK_M_1
MIPI_CSI 0_CLK_P_1
MIPI_CSI 0_LANE3_P_1
MIPI_CSI 0_LANE3_M_1
RCAM_RST_N
CAM_I2C_SC L
CAM_I2C_SD A
ESD1901
TVM0G100M 010R
12
ESD1903
TVM0G100M 010R
12
ESD1904
TVM0G100M 010R
12
CON1901
DF30F C-24DS-0. 4V(81)
221
1
334
4
556
6
7
7
9
9
11
11
13
13
15
15
17
17
19
19
21
21
23
23
8
8
10
10
12
12
14
14
16
16
18
18
20
20
22
22
24
24
C1918
100pF
RCAM_AVDD
L1901 600R
ESD1906
TVM0G100M010R
12
ESD1902
TVM0G100M 010R
12
RCAM_DOVD D
R1906
8M REAR CAMERA
When rear camera assemble correctly and app turn on, there is no function
Troubleshooting Tips1:
a. Check Main reference clk = 24Mhz
b. Check MIPI data/clk exist on all lines
After imager APP is launched.
c. Check VREG_L5_1P2 is high (1.2V), C1920
d. Check V_RCAM_AVDD_2P8= 2.8V, L1901
e. Check RCAM_DOVDD_1P8 = 1.8V, C1903
f. Check VREG_L28_2P8 = 2.8V, C1901
g. Check I2C clk/sda activity is present.
h. Check reset is high (1.8V), CON1901 pin19
REAR CAM DOVDD POWER
RCAM_DOVDD _1P8
VPH_PWR
U1901
RP114K181D-TRB
VOUT
1
GND
2
CE
3
VDD
4
GND1
5
C1904
1uF
C1905
1uF
RCAM_DOVDD _EN
V_RCAM_AVDD_2P8
VPH_PWR
RCAM_AVDD_EN
C1921
1uF
C1922
1uF
REAR CAM AVDD POWER
U1905
RP114K281D-TRB
VOUT
1
GND
2
CE
3
VDD
4
GND1
5
Troubleshooting Tips2:
a. RCAM_AVDD_EN (GPIO_27)
b. RCAM_DOVDD_EN (GPIO_33)
above signal are from MSM when the LCM on,
enable signal should be pull up to 1.8V
May 27, 2014
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Motorola Mobility Confidential Restricted:
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Front Camera
" The sensor is a diagonal 2.59 mm (Type 1/6.95) back-illuminated type CMOS
image sensor with a square pixel array and approx. 2.4 M effective pixels.
" The sensor consists of a minimum of 1976 active horizontal pixels and 1200
active vertical pixels.
" The Module is capable of auto exposure, white balance, color correction, and
color conversion.
" This device provides a finished image at up to 30 fps (frames per second)
image data at 1976x1200 full resolution on a mobile device to enable image
capture and video clip capture.
" Analog Supply regulator (2.8V) located on PCB.
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