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Internal Use Only
Service ManualLG-LS980
Date: August, 2013 / Issue 0.9
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- 2 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
Table Of Contents
1. INTRODUCTION ..................................................................... 3
1.1 Purpose ........................................................................................................3
1.2 Regulatory Information .........................................................................3
2. PERFORMANCE...................................................................... 5
2.1 Product Name ............................................................................................5
2.2 Supporting Standard ..............................................................................5
2.3 Functions of Major Semi-Conductors ..............................................6
2.4 HW Features ...............................................................................................7
2.5 SW Features ................................................................................................8
2.6 Battery Bar. ...............................................................................................11
2.7 LG980 Figures ......................................................................................... 12
3. TROUBLE SHOOTING .......................................................... 13
3.1 RF Component ....................................................................................... 13
3.2 Signal Path ............................................................................................... 17
3.3 Checking XO Block ................................................................................ 20
3.4 Checking U1000 ....................................................................................23
3.5 Checking WCDMA Block .................................................................... 25
3.6 Checking GSM Block ............................................................................ 44
3.7 SIGNAL PATH (CDMA<E) ................................................................ 54
3.8 GPS/WIFI/BT Module ............................................................................ 82
3.9 GPS/WIFI/BT SIGNAL PATH ................................................................ 84
3.10 Audio trouble ....................................................................................... 92
3.11 Camera ..................................................................................................108
3.12 Main LCD trouble ..............................................................................114
3.13 Touch trouble .....................................................................................118
3.14 Vibrator Troubleshooting ..............................................................122
3.15 Gyro Sensor troubleshooting ......................................................1253.16 Accelerometer Sensor troubleshooting ..................................127
3.17 Compass sensor troubleshooting ..............................................129
3.18 Proximity Sensor on/off trouble .................................................131
3.19 Light Sensor on/off trouble ..........................................................134
3.20 Power ON Troubleshooting ..........................................................137
3.21 Charging Troubleshooting ............................................................140
3.22 USB Trouble shooting .....................................................................142
3.23 HDMI Troubleshooting ...................................................................144
3.24 FM Radio Troubleshooting............................................................146
4. DOWNLOAD .......................................................................149
5. BLOCK DIAGRAM .............................................................. 166
6. CIRCUIT DIAGRAM ............................................................ 176
7. BGA PIN MAP .....................................................................196
8. PCB LAYOUT ....................................................................... 217
9. CALIBRATION .....................................................................228
10. NAM INPUT METHOD .....................................................247
11. DISASSEMBLE GUIDE ...................................................... 254
12. EXPLODED VIEW & REPLACEMENT PART LIST .............261
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LGE Internal Use Only
1. INTRODUCTION
1. INTRODUCTION
This manual provides the information necessary to repair, calibration, description and download the features
of this model.
1. 1 Purpose
Toll fraud, the unauthorized use of telecommunications system by an unauthorized part (for example,
persons other than your companys employees, agents, subcontractors, or person working on your
companys behalf) can result in substantial additional charges for your telecommunications services.
System users are responsible for the security of own system. There are may be risks of toll fraud associated
with your telecommunications system. System users are responsible for programming and configuring
the equipment to prevent unauthorized use. The manufacturer does not warrant that this product is
immune from the above case but will prevent unauthorized use of common carrier
telecommunication service of facilities accessed through or connected to it. The manufacturer will not
be responsible for any charges that result from such unauthorized use.
1. 2 Regulatory Information
A. Security
B. Incidence of Harm
If a telephone company determines that the equipment provided to customer is faulty and possibly
causing harm or interruption in service to the telephone network, it should disconnect telephone
service until repair can be done. A telephone company may temporarily disconnect service as long as repair
is not done.
C. Changes in Service
A local telephone company may make changes in its communications facilities or procedure. If thesechanges could reasonably be expected to affect the use of the phones or compatibility with the net work,
the telephone company is required to give advanced written notice to the user, allowing the user to take
appropriate steps to maintain telephone service.
D. Maintenance Limitation
Maintenance limitations on the phones must be performed only by the manufacturer or its authorized agent.
The user may not make any changes and/or repairs expect as specifically noted in this manual. Therefore,
note that unauthorized alternations or repair may affect the regulatory status of the system and may void any
remaining warranty.
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1. INTRODUCTION
E. Notice of Radiated Emission
This model complies with rules regarding radiation and radio frequency emission as defined by local
regulatory agencies. In accordance with these agencies, you may be required to provide information such as
the following to the end user.
ATTENTION
H. Electrostatic Sensitive Devices
Boards, which contain Electrostatic Sensitive Device (ESD), are indicated by the
sign. information is ESD handling: Following
Service personnel should ground themselves by using a wrist strap when exchange system boards.
When repairs are made to a system board, they should spread the floor with anti-static mat which is
also grounded.
Use a suitable, grounded soldering iron.
Keep sensitive parts in these protective packages until these are used.
When returning system boards or parts like EEPROM to the factory, use the protective package as
described.
A phone may interfere with sensitive laboratory equipment, medical equipment, etc. Interference from
unsuppressed engines or electric motors may cause problems.
G. Interference and Attenuation
F. Pictures
The pictures in this manual are for illustrative purposes only; your actual hardware may look slightly
different.
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2. PERFORMANCE
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LGE Internal Use Only
2. PERFORMANCE
2.1 Product Name
LS980 : US Cellular(BC10 Support)/US PCS(EVDO Rev_0 /Rev_A) /LTE B25,B26,B41 WCDMA B1,B2,B5/GSM Quadband
2.2 Supporting Standard
Item Feature Comment
Supporting Standard
US Cellular(BC10 Support )/ US PCS/GPS
LTE B25, B26, B41WCDMA B1,B2,B5
GSM Quad-Band
RoamingRoaming
Frequency Range
US Cellular TX : 816 ~ 848.19 MHz
US Cellular RX : 861~893.19 MHz
US PCS TX : 1850~1910 MHz
US PCS RX : 1930~1990 MHz
LTE B25 TX : 1850~1915 MHz
LTE B25 RX : 1930~1995 MHz
LTE B26 TX : 814~849 MHz
LTE B26 RX : 859~894 MHz
LTE B41 TX/RX : 2496~2690 MHz
WCDMA B1 TX : 1920~1980 MHz
WCDMA B1 RX : 2110~2170 MHz
WCDMA B2 TX : 1850~1910 MHz
WCDMA B2 RX : 1930~1990 MHz
WCDMA B5 TX : 824~849 MHz
WCDMA B5 RX : 869~894 MHz
GSM850 TX : 824~849 MHz
GSM850 RX : 869~894 MHz
GSM900 TX : 880~915 MHz
GSM900 RX : 921~960 MHz
GSM1800 TX : 1710~1785 MHz
GSM1800 RX : 1805~1880 MHz
GSM1900 TX : 1850~1910 MHz
GSM1900 RX : 1930~1990 MHz
GPS : 1575.42 MHz
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2. PERFORMANCE
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Classification Function
MSM8974 Digital Baseband Processor 4G
WTR1605L-1 4G MODEM
PM9841 PMIC
PM8841 PMIC
H9CKNNNBPTMRLR Mobile SDRAM(LPDDR3)
LBEH5DPYJC-620 BT/WLAN Tranceiver
2.3 Functions of Major Semi-Conductors
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2. PERFORMANCE
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LGE Internal Use Only
2.4 HW Features
Item Feature Comment
Form Factor DOP
Battery 1) Capacity
Standard : Li-Ion Polymer, 3000mAh
2) Packing Type : Soft Pack Embeded
Size Standard : 138.5 X 70.9 X 8.9
Weight 141g(Battery)
LCD Full HD IPS LCD
(5.2, 1920 X 1280 Pixels)
Built-in Camera 13M AF(OIS) + 2.4M VT
Keypad Full Touch Screen
Back Side Key : 3
Back Side Key :
Power On,
Volume up/down
ANT Main : Internal Fixed Type
System connector u-USB
Ear Phone Jack 3.5 Ear Jack
Memory 16Gb(SDRAM LPDDR3)
+ 32GB eMMC
Speech coding SILK,QCELP, EVRC, EVRC-B, EVRC-WB, G.711,
G.729A/AB, GSM-FR/EFR/HR, AMR
Vibrator Built in Vibrator
(Linear Motor Type)
Blue Tooth Bluetooth 4.0+EDR
MIDI(for Buzzer
Function)
SW Decoded 64Poly
Music Player MP3, AC3, eAC3, AAC, (e)AAC+, WMA, FLAC,
AMR, EVRC, QCELP, OGG, MIDI, PCM
Video Player MPEG4, H.264
Camcorder MPEG4 or H.263
Voice Recording Yes
Speaker Phone mode
Support
Yes
Travel Adapter Yes
CDROM No
Stereo Headset No
Data Cable Yes
T-Flash
(External Memory)No 32GB eMMC embeded
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2. PERFORMANCE
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2.5 SW Features
Item Feature Comment
RSSI 0 ~ 7 Levels
Battery Charging 0 ~ 7 Levels
Key Volume 0 ~ 7 Level
Audio Volume 0 ~ 15 Level
Time / Date Display Yes
Multi-Language YesEnglish,Spanish,Korean,
Chineses(CN,TW)
Quick Access ModePhone / Messaging / Browser /
ContactsIt is editable by users.
PC Sync No
Speed Dial Yes Voice mail center -> 1 key
Profile Yes
not same with feature phone
setting
CLIP / CLIR NO
Phone Book
Name / Number / Email / Website /
Postal addresses / Organizations /
Groups / Birthday Notes / Ringtone
There is no limitation on the
number of items. It depends on
available memory amount.
Last Dial Number Yes
There is no limitation on the
number of items. It depends on
available memory amount..
Last ReceivedNumber
YesThere is no limitation on the
number of items. It depends on
available memory amount...
Last Missed Number Yes
There is no limitation on the
number of items. It depends on
available memory amount...
Search by Number
/ NameName / Number
Email , Nick name, AIM and the
other fields listed on the contacts
are also searchable.
Group Yes
There is no limitation on the
number of items. It depends on
available memory amount.
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2. PERFORMANCE
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Fixed Dial Number No
Service Dial Number No
Own Number No
Voice Memo No Only Support Voice Command
Call Reminder No
Network Selection Automatic
Mute Yes
Call Divert No
Call Barring No
Call Charge (AoC) No
Call Duration No
SMS (EMS)
There is no limitation on the number
of items.It depends on availablememory amount.
EMS does not support.
SMS Over GPRS No
EMS Melody / Picture No
Send / Receive / Save Yes
MMS MPEG4
Send / Receive / SaveYes
Long Message MAX 761 characters SMS 5 concatenated
Cell Broadcast Yes
Download Yes
Game No
Calendar Yes
Memo Yes
World Clock Yes
Unit Convert No
Stop Watch Yes It is included on Alarm/Clock
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2. PERFORMANCE
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Wall Paper Yes
WAP Browser NoWAP stack and wml are not
supported.
Download Melody /
WallpaperYes Over web browser
SIM Lock No
SIM Toolkit No
MMS Yes
Camera Yes13M AF
VT : 2.1 MP
JAVA No Android do not support JAVA
Voice Dial Yes
IrDa No
Bluetooth Yes Ver. 4.0
FM radio No
GPRS Yes Class 10
EDGE Yes Class 10
Hold / Retrieve Yes
Conference Call Yes Max. 3
DTMF Yes
Memo pad Yes
TTY Yes
AMR Yes
SyncML No
IM Yes Hangout
Email Yes
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2. PERFORMANCE
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LGE Internal Use Only
Battery Bar Specification Battery Bar Specification
Bar 20(Full) 98% Bar 9 -> Bar 8 43% -> 42%
Bar 20 -> Bar 19 98% -> 97% Bar 8 -> Bar 7 38% -> 37%
Bar 19 -> Bar 18 93% -> 92% Bar 7 -> Bar 6 33% -> 32%
Bar 18 -> Bar 17 88% -> 87% Bar 6 -> Bar 5 28% -> 27%
Bar 17 -> Bar 16 83% -> 82% Bar 5 -> Bar 4 23% -> 22%
Bar 16 -> Bar 15 78% -> 77% Bar 4 -> Bar 3 18% -> 17%
Bar 15 -> Bar 14 73% -> 72% Bar 3 -> Bar 2 13% -> 12%
Bar 14 -> Bar 13 68% -> 67% Bar 2 -> Bar 1 8% -> 7%
Bar 13 -> Bar 12 63% -> 62% Bar 1 -> Bar 0 3% -> 2%
Bar 12 -> Bar 11 58% -> 57% Power off 2% -> 1%
Bar 11 -> Bar 10 53% -> 52% Low battery pop-up 15% , 5%, 1%
Bar 10 -> Bar 9 48% -> 47%
2.6 Battery Bar
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2. PERFORMANCE
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LGE Internal Use Only
2.7 LG980 Figures
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3. TROUBLE SHOOTING
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LGE Internal Use Only
3. TROUBLE SHOOTING
3.1 RF Component
TOP
U1001 B1,B2,
B5 GSM
Quard HCPA
U1002 B1,B2,
B5 GSM_
Quard FEMid
U1008
B41 Tx SAW
U1007 B41
PAM
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3. TROUBLE SHOOTING
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BOT
1
23
4
5
6
7
8
9 1011
12
13 14
15
16
17
18
2021
19
1. U2002 : RF Tranceiver
2. FL2002 : Drx Separator
3. FL2003 : BC1,B25 Drx SAW
4. U1004 : BC0,BC10 B26 PAM
5. U1009 : Quadplexer
6. FL1004 : BC0,BC10,B26 Tx SAW
7. U1000 : Separator
8. U1003 : BC1,B25 PAM
9. FL2010 : BC0,BC10B5,B26 G850 Prx Separator
10. FL100 : 1BC1,L25 B2 Prx Separator
11. U1006 : B41 Prx SAW
12. U1010 : B41 Tx/Rx Separator
13. SW1001 : RF Switch
14. SW1000 : RF Switch
15. SW1002 : RF Switch
16. SW1003 : RF Switch
17. FL1007 : B41 Balun
18. FL2005 : BC0, BC10 Drx SAW
19. FL2001 : B41 Drx SAW
20. U1005 : DC-DC Convertor
21. U2011 : DC-DC Convertor
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3. TROUBLE SHOOTING
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ANT2005 C9027
ANT2004
C2025
C2024
U9006
L20
L2024
C2008
L2026
U2001L2007
C90
C2016
U9004
R2001
L2027
SW2001
C9032
C2022
C2084
L2025C2023
C2026
SW2002
C2027
C2006
L2021
L20
C9031
L2022
FL2004
C2020
U2000
C2018
C2021
C10029
C2082
R2000
U2001
GSP LNA
U2000 B41
DRx SAW FL2004 B41,GPS Separator
ANT2004 C-Cilp
ANT2005 C-Clip
SW2002
RF Switch
1817
34
30 16
15
ANT200
ANT206
FL103
MIC200
ZD202
CN306
C132
C204
C209
CN302
FB204
FB203
ZD203
ZD205
FB207
ZD204
C202
C210
C201
D102 C
205
VA202
R213
D105
C215
C206
D103
VA204
C213
D104
ANT205
C203
CN100
CN305
VA203
FB200
FL102
ZD201
R214
SW202
C211
FB201 L202
SW203
C200
C207
R212SW202
BC0,BC1,BC10,
B1,B2,B5,B25,B26
SW203B41
FPCB
BOT-GPS
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3. TROUBLE SHOOTING
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LGE Internal Use Only
Reference Description
FL1001 BC1,B2,B25 PRx Separator
FL1004 BC0,BC10,B26 Tx SAW
FL1007 B41 PRx Balun
FL2001 B41 DRx Balun
FL2002 BC0,BC1,BC10,B25,B26 DRx Separator
FL2003 BC1,B25 DRx SAW
FL2004 B41,GPS Separator
FL2005 BC0,BC10,B26 DRx SAW
FL2007 BC1,B1,B2,B25 Tx Separator
FL2010 BC0,BC10,B5,B26,G850 PRx Separator
SW1000 RF Switch
SW1001 RF Switch
SW1002 RF Switch
SW1003 RF SwitchU1000 BC0,BC1,BC10,B1,B2,B5,GSM Quad Separator
U1001 B1,B2,B5,GSM Quad HCPA
U1002 B1,B2,B5,GSM Quad FEMid
U1003 BC1,B25 PAM
U1004 BC0,BC1,B26 PAM
U1005 DC-DC convertor
U1006 B41 PRx SAW
U1007 B41 PAM
U1008 B41 Tx SAW
U1009 BC0,BC1,BC10,B25,B26 Quadplexer
U1010 B41 TRx Separator
U1011 DC-DC Convertor
U2000 B41 DRx SAW
U2001 GPS LNA
U2002 RF Transceiver
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3. TROUBLE SHOOTING
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3.2 Signal Path
WCDMA B1, B5 and B2 TX Signal PATH
1. WCDMA B1 TX PATH
2. WCDMA B5 TX PATH
3. WCDMA B2 TX PATH
4. COMMON TX/RX PATH
WCDMA Tx flow
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3. TROUBLE SHOOTING
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WCDMA B1, B5 and B2 RX Signal PATH
1. WCDMA B1 RX PATH
2. WCDMA B5 RX PATH3. WCDMA B2 RX PATH
4. COMMON TX/RX PATH
WCDMA RX flow
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3. TROUBLE SHOOTING
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GSM850/GSM900/DCS1800/PCS1900 RX/TX Signal PATH
1. GSM850/GSM900 TX PATH
2. DCS1800/PCS1900 TX PATH
3. GSM900 RX PATH
4. GSM850 RX PATH5. DCS1800/PCS1900 RX PATH
6. COMMON RX/TX PATH
GSM Tx/Rx flow
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3. TROUBLE SHOOTING
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LGE Internal Use Only
3.3 Checking XO Block
The output frequency (19.2MHz) of XO (X6000) is used as the eference one of WTR1605L(U2002) and PM8941(U6001)
internal VCO.
BOT
TOP
X6000
TP1
U2002
TP2
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3. TROUBLE SHOOTING
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Schematic of the Crystal Part (19.2MHz
X1E0002910001
19.2MHz
X6000
XTAL1 GND/Therm
XTAL2Thermistor
C6026
0.1u 1n
C6027
R6041
DNI
DNI
R6042
GND_XOADC
XTAL_19M_IN
XTAL_19M_OUT
XTAL_32K_IN
XTAL_32K_OUT
VREF_XO
XO_THERM
13'1/21
TP1
R2008 4.75K
100pC2076
DNI
C2077
1
2
93
60
79
120
105
121
88
114
96DNC4
DNC5
GP_DATA2GP_DATA1
GP_DATA0
XO_IN
VTUNE_PRX
RBIAS
DNC3
WTR0_GPDATA0
WTR0_GPDATA1
XO_OUT_A0
TP2
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3. TROUBLE SHOOTING
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Check TP1
YES
YES
XO OK
NO
NO
19.2MHz Signal
OKCheck the X6000
X6000Check the U600119.2MHz Signal
Check TP2
Flow chart for the troubleshooting
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3. TROUBLE SHOOTING
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3.4 Checking U1000
Check the supply voltage and control level for U1000
BOT
U1000
TP2TP1
TP3
L1002
DNI100n
L1001
SW1001 MS-156C
43
2
1ANT COMMON
G3 G4
+3V0
_VREG
_L16
C1095
1 00 p 1 00 p
C1096
10n
C1097
C1109
1.5n
U1000RF1602
7 8 9
10
11
12
2
13
1
5
46 3
GND2
GND4
GND3
RF1
GND1
GND7
ANT
GND6
RF2
GND5
VBATT
EN
CTRL
C1001 1n
GRFC20
_SW
GRFC21
_SW
TP1TP2
TP3
BC0,BC1,BC10
B25,B26
GSM
QuadB1,B2,B5
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3. TROUBLE SHOOTING
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-True Table
VBATT EN CTRL
RF1 High High Low
RF2 High High High
Check TP1
YES
YES
YES
CDMAPath OPEN
NO
NO
NO
TP1>2.7V
TP2 Check the Power ON
Check the U1000
Global Path OPEN
TP3 >High
TP3 >High
Check TP3
Check TP2
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3. TROUBLE SHOOTING
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3.5 Checking WCDMA Block
START
Check XO (19.2MHz) Block
Refer to 3.3
BoardCheck the U1000
Refer to 3.4
Check T/RX Level
Re-Download & Cal
Change the Board
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3. TROUBLE SHOOTING
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3.5.1 Checking XO (19.2MHz) Block
Refer to 3.3
3.5.2 Checking the U1000
Refer to 3.4
3.5.3 Checking RF TX Level
WCDMA B1
BOT
TOP
U1000
TP1
TP3
TP2
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3. TROUBLE SHOOTING
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LGE Internal Use Only
1.5n
C1011
L1002
DNI100n
L1001
SW1001 MS-156C
43
2
1ANT COMMON
G3 G4
DNI
C1014
+3V0
_VRE
G_L
16
C1095
1 00 p 1 00 p
C1096
10n
C1097
C1109
1.5n
L1007
1.5n
L1061
DNI
U1000RF1602
7 8 9
10
11
12
2
13
1
5
46 3
GND2
GND4
GND3
RF1
GND1
GND7
ANT
GND6
RF2
GND5
VBATT
EN
CTRL
C1001 1n
GRFC20_S
W
GRFC21_S
W
TX_ANT_BC0_BC1_BC10_B25_B26
RF2 (Global)
RF1 (CDMA)
H
LH
CTRLENPath
H
TP1
L1008
0.5p 2.2u
C1005
1.5n
L1065
DNI
L1011L1010DNI
L1009
0.5p
C1002
2.2n
+1V8_VREG_S3A
3.3nC1010
C1003
1n
L1005
1.2p
10u
C1004
L1004
DNI
33pC1009C1008
33p
1.8n
C1016
L1015DNI
C1021
33p
C1020
33p
L1017
DNI
33pC102533pC1024
L1003
DNI
L1000
DNI
DNIL1006
C1013
1n
C1113
33p
C1114
33p
VPA
+VPWR_RF
VPA_GSM
C1012
1n
C1000
10u
L1064
DNI
DNIL1066 L1067
DNI
U1001
ACPM-7700-TR1
43
42
41
40
39
37
38
35
36
34
26
27
28
29
30
31
32
33
23
22
9
12
7
20
21
19
15
2
18
8
10
11
14
16
17
13
1
25
6
5
4
3
24RFOUT_GSM_HB
NC1
RFIN_B5_B8
NC2
VIO
GND12
RFIN_B1_B2
RFIN_GSM_HB
GND6
GND5
RFIN_GSM_LB
VBATT
GND2
SCLK
GND7
RFIN_B3_B4
GND4
GND8
GND10
GND9
GND1
GND3
SDATA
RFOUT_GSM_LB
GND11
RFOUT_B3/B4
RFOUT_B2
RFOUT_B5
NC3
RFOUT_B8
VCC1
VCC2
VCC_GSM
NC4
GND13
RFOUT_B1
GND14
CPL_
OUT
GND15
GND16
GND17
GND18
PGND
C1015
3.3n
RFFE1_DATA
RFFE1_CLK
TX_OUT_GSMHB
TX_OUT_GSMLB
TX_OUT_B1_B2
TX_ANT_GSMHB
TX_ANT_GSMLB
TX_ANT_B1
TX_ANT_B2
CPL_GLOBAL
TX_OUT_B5
TX_ANT_B5
B1
B2
G850/G900
G1800/G1900
B5
TP2
TP3
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3. TROUBLE SHOOTING
- 28 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
Check TP1 Over 21dBm?
Check TP2 Over 21dBm?
Check TP3 Over -3dBm?
Yes
Yes
Yes
No
No
No
RF TX Level is OK
Check the U1002(FEMid)
Check U1001(PAM)
Check the U1000
Check the U2002
(WTR1605L)
First, Check the conducted Max. Power using the RF Connector
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3. TROUBLE SHOOTING
- 29 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
WCDMA B2
BOT
U1000
TP1
TOP
TP3
TP2
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3. TROUBLE SHOOTING
- 30 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
1.5n
C1011
L1002
DNI100n
L1001
SW1001 MS-156C
43
2
1ANT COMMON
G3 G4
DNI
C1014
+3V0
_VRE
G_L
16
C1095
1 00 p 1 00 p
C1096
10n
C1097
C1109
1.5n
L1007
1.5n
L1061
DNI
U1000RF1602
7 8 9
10
11
12
2
13
1
5
46 3
GND2
GND4
GND3
RF1
GND1
GND7
ANT
GND6
RF2
GND5
VBATT
EN
CTRL
C1001 1n
GRFC20_S
W
GRFC21_S
W
TX_ANT_BC0_BC1_BC10_B25_B26
RF2 (Global)
RF1 (CDMA)
H
LH
CTRLENPath
H
TP1
L1008
0.5p 2.2u
C1005
1.5n
L1065
DNI
L1011L1010DNI
L1009
0.5p
C1002
2.2n
+1V8_VREG_S3A
3.3nC1010
C1003
1n
L1005
1.2p
10u
C1004
L1004
DNI
33pC1009C1008
33p
1.8n
C1016
L1015DNI
C1021
33p
C1020
33p
L1017
DNI
33pC102533pC1024
L1003
DNI
L1000
DNI
DNIL1006
C1013
1n
C1113
33p
C1114
33p
VPA
+VPWR_RF
VPA_GSM
C1012
1n
C1000
10u
L1064
DNI
DNIL1066 L1067
DNI
U1001
ACPM-7700-TR1
43
42
41
40
39
37
38
35
36
34
26
27
28
29
30
31
32
33
23
22
9
12
7
20
21
19
15
2
18
8
10
11
14
16
17
13
1
25
6
5
4
3
24RFOUT_GSM_HB
NC1
RFIN_B5_B8
NC2
VIO
GND12
RFIN_B1_B2
RFIN_GSM_HB
GND6
GND5
RFIN_GSM_LB
VBATT
GND2
SCLK
GND7
RFIN_B3_B4
GND4
GND8
GND10
GND9
GND1
GND3
SDATA
RFOUT_GSM_LB
GND11
RFOUT_B3/B4
RFOUT_B2
RFOUT_B5
NC3
RFOUT_B8
VCC1
VCC2
VCC_GSM
NC4
GND13
RFOUT_B1
GND14
CPL_
OUT
GND15
GND16
GND17
GND18
PGND
C1015
3.3n
RFFE1_DATA
RFFE1_CLK
TX_OUT_GSMHB
TX_OUT_GSMLB
TX_OUT_B1_B2
TX_ANT_GSMHB
TX_ANT_GSMLB
TX_ANT_B1
TX_ANT_B2
CPL_GLOBAL
TX_OUT_B5
TX_ANT_B5
B1
B2
G850/G900
G1800/G1900
B5
TP2
TP3
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3. TROUBLE SHOOTING
- 31 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
Check TP1 Over 21dBm?
Check TP2 Over 21dBm?
Check TP3 Over -3dBm?
Yes
Yes
Yes
No
No
No
RF TX Level is OK
Check the U1002(FEMid)
Check U1001(PAM)
Check the U1000
Check the U2002
(WTR1605L)
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3. TROUBLE SHOOTING
- 32 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
WCDMA B5
BOT
U1000
TP1
TOP
TP3
TP2
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3. TROUBLE SHOOTING
- 33 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
1.5n
C1011
L1002
DNI100n
L1001
SW1001 MS-156C
43
2
1ANT COMMON
G3 G4
DNI
C1014
+3V0
_VRE
G_L
16
C1095
1 00 p 1 00 p
C1096
10n
C1097
C1109
1.5n
L1007
1.5n
L1061
DNI
U1000RF1602
7 8 9
10
11
12
2
13
1
5
46 3
GND2
GND4
GND3
RF1
GND1
GND7
ANT
GND6
RF2
GND5
VBATT
EN
CTRL
C1001 1n
GRFC20_S
W
GRFC21_S
W
TX_ANT_BC0_BC1_BC10_B25_B26
RF2 (Global)
RF1 (CDMA)
H
LH
CTRLENPath
H
TP1
L1008
0.5p 2.2u
C1005
1.5n
L1065
DNI
L1011L1010DNI
L1009
0.5p
C1002
2.2n
+1V8_VREG_S3A
3.3nC1010
C1003
1n
L1005
1.2p
10u
C1004
L1004
DNI
33pC1009C1008
33p
1.8n
C1016
L1015DNI
C1021
33p
C1020
33p
L1017
DNI
33pC102533pC1024
L1003
DNI
L1000
DNI
DNIL1006
C1013
1n
C1113
33p
C1114
33p
VPA
+VPWR_RF
VPA_GSM
C1012
1n
C1000
10u
L1064
DNI
DNIL1066 L1067
DNI
U1001
ACPM-7700-TR1
43
42
41
40
39
37
38
35
36
34
26
27
28
29
30
31
32
33
23
22
9
12
7
20
21
19
15
2
18
8
10
11
14
16
17
13
1
25
6
5
4
3
24RFOUT_GSM_HB
NC1
RFIN_B5_B8
NC2
VIO
GND12
RFIN_B1_B2
RFIN_GSM_HB
GND6
GND5
RFIN_GSM_LB
VBATT
GND2
SCLK
GND7
RFIN_B3_B4
GND4
GND8
GND10
GND9
GND1
GND3
SDATA
RFOUT_GSM_LB
GND11
RFOUT_B3/B4
RFOUT_B2
RFOUT_B5
NC3
RFOUT_B8
VCC1
VCC2
VCC_GSM
NC4
GND13
RFOUT_B1
GND14
CPL_
OUT
GND15
GND16
GND17
GND18
PGND
C1015
3.3n
RFFE1_DATA
RFFE1_CLK
TX_OUT_GSMHB
TX_OUT_GSMLB
TX_OUT_B1_B2
TX_ANT_GSMHB
TX_ANT_GSMLB
TX_ANT_B1
TX_ANT_B2
CPL_GLOBAL
TX_OUT_B5
TX_ANT_B5
B1
B2
G850/G900
G1800/G1900
B5
TP2
TP3
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34/261
3. TROUBLE SHOOTING
- 34 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
Check TP1 Over 21dBm?
Check TP2 Over 21dBm?
Check TP3 Over -3dBm?
Yes
Yes
Yes
No
No
No
RF TX Level is OK
Check the U1002(FEMid)
Check U1001(PAM)
Check the U1000
Check the U2002
(WTR1605L)
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3. TROUBLE SHOOTING
- 35 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
3.5.4 Checking RF Rx Level
WCDMA B1
BOT
TP1
TP2
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3. TROUBLE SHOOTING
- 36 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
1.5n
C1011
+3V0_VREG_L16+1V8_VREG_S3A
100p
C1007
100p
C1006
C10221n
2.2nC1031
C10352.2n
DNI
L1018
L1002
DNI
C10332.2n
L1016
5.1n
2.2nC1036
DNI
L1022
100n
L1001
L1021
10n
C1030
33p
33p
C1027
DNIL1019
LMSW6SGM-F12
U1002
46
45
44
43
42
41
17
40
13
12
18
26
19
31
21
20
38
39
3
28
1
27
2
11
4
22
5
23
24
34
25
32
33
29
35
30
36
16
8
15
10
14
9
37
7
6RX_BAND2_1
RX_BAND2_2
VIO
GSM_HB_RX_1
GND8
GSM_HB_RX_2
RX
_BAND5
_1
GND4
RX
_BAND5
_2
VDD
TRX3
GND14
GSM_LB_TX
GND13
GND12
TRX1
ANT
TX_BAND2
GND11
GND3
TX_BAND1
RX_BAND1_2
GND5
GND2
TX_BAND8
GND1
GSM_HB_TXRX_BAND1_1
SCLK
SDATA
GND10
TRX2
TRX4
RX
_BAND8
_2
TX_BAND5
RX
_BAND8
_1
GND6
GND7
GND15
GND9
GND16
GND17
GND18
GND19
GND20
GND21
C102612n
SW1001 MS-156C
43
2
1ANT COMMON
G3 G4
DNI
C1014
+3V0
_VREG
_L16
C10231n
C1095
1 0 0p 1 0 0p
C1096
10n
C1097
C1109
1.5n
L1007
1.5n
L1061
DNI
C102812n
U1000RF1602
7 8 9
10
11
12
2
13
1
5
46 3
GND2
GND4
GND3
RF1
GND1
GND7
ANT
GND6
RF2
GND5
VBATT
EN
CTRL
C1001 1n
GRFC20_
SW
GRFC21_
SW
RFFE2_CLK
RFFE2_DATA
PRX_B1_INP
PRX_B1_INM
PRX_G900_INM
PRX_G900_INP
TX_ANT_GSMHBTX_ANT_GSMLB
TX_ANT_B1
TX_ANT_B2
PRX_B2_INM
PRX_B2_INP
PRX_G1800_G1900_INM
PRX_G1800_G1900_INP
TX_ANT_B5
PRX_B5_G850_INP
PRX_B5_G850_INM
TX_ANT_BC0_BC1_BC10_B25_B26
RF2 (Global)
RF1 (CDMA)
H
LH
CTRLENPath
H
TP1
TP2
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3. TROUBLE SHOOTING
- 37 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
Check TP1 Signal Exist?
Check TP2 Signal Exist?
Yes
Yes
No
No
RF TX Level is OK
Check the U1002(FEMid)
Check the U1000
Check the U2002
(WTR1605L)
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3. TROUBLE SHOOTING
- 38 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
WCDMA B2
BOT
TOP
U2002
FL1001
TP1
TP3
TP2
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3. TROUBLE SHOOTING
- 39 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
1.5n
C1011
+3V0_VREG_L16+1V8_VREG_S3A
100p
C1007
100p
C1006
C10221n
2.2nC1031
C10352.2n
DNI
L1018
L1002
DNI
C10332.2n
L1016
5.1n
2.2nC1036
DNI
L1022
100n
L1001
L1021
10n
C1030
33p
33pC1027
DNIL1019
LMSW6SGM-F12
U1002
46
45
44
43
42
41
17
40
13
12
18
26
19
31
21
20
38
39
3
28
1
27
2
11
4
22
5
23
24
34
25
32
33
29
35
30
36
16
8
15
10
14
9
37
7
6RX_BAND2_1
RX_BAND2_2
VIO
GSM_HB_RX_1
GND8
GSM_HB_RX_2
RX
_BAND5
_1
GND4
RX
_BAND5
_2
VDD
TRX3
GND14
GSM_LB_TX
GND13
GND12
TRX1
ANT
TX_BAND2
GND11
GND3
TX_BAND1
RX_BAND1_2
GND5
GND2
TX_BAND8
GND1
GSM_HB_TX
RX_BAND1_1
SCLK
SDATA
GND10
TRX2
TRX4
RX
_BAND8
_2
TX_BAND5
RX
_BAND8
_1
GND6
GND7
GND15
GND9
GND16
GND17
GND18
GND19
GND20
GND21
C102612n
SW1001 MS-156C
43
2
1ANT COMMON
G3 G4
DNI
C1014
+3V0
_VREG
_L16
C10231n
C1095
1 0 0p 1 0 0p
C1096
10n
C1097
C1109
1.5n
L1007
1.5n
L1061
DNI
C102812n
U1000RF1602
7 8 9
10
11
12
2
13
1
5
46 3
GND2
GND4
GND3
RF1
GND1
GND7
ANT
GND6
RF2
GND5
VBATT
EN
CTRL
C1001 1n
GRFC20_
SW
GRFC21_
SW
RFFE2_CLK
RFFE2_DATA
PRX_B1_INP
PRX_B1_INM
PRX_G900_INM
PRX_G900_INP
TX_ANT_GSMHB
TX_ANT_GSMLB
TX_ANT_B1
TX_ANT_B2
PRX_B2_INM
PRX_B2_INP
PRX_G1800_G1900_INM
PRX_G1800_G1900_INP
TX_ANT_B5
PRX_B5_G850_INP
PRX_B5_G850_INM
TX_ANT_BC0_BC1_BC10_B25_B26
RF2 (Global)
RF1 (CDMA)
H
LH
CTRLENPath
H
TP1
TP2
FL1001
XMSSJE3G0PA-003TMP
3
9
7
5 6
1
4
10
8
2GND1
PORT1-
PORT3-
PORT2-
PORT3+
CTLPORT2+
PORT1+
VDD
GND2
+3V0_VREG_L16
100p
C1037 C1038
100p
33pC1034
33pC1029
L1020
5.6n
PRX_SW_SEL0
PRX_B25_BC1_INM
PRX_B25_BC1_INP
PRX_B2_INM
PRX_B2_INP
PRX_BC1_B2_B25_INP
PRX_BC1_B2_B25_INM
TP3
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3. TROUBLE SHOOTING
- 40 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
Check TP1 Signal Exist?
Check TP2 Signal Exist?
Check TP3 Signal Exist?
Yes
Yes
Yes
No
No
No
RF TX Level is OK
Check the U1002(FEMid)
Check the FL1001
Check the U1000
Check the U2002
(WTR1605L)
7/22/2019 LG-G2-LS980_Servive manual
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3. TROUBLE SHOOTING
- 41 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
WCDMA B5
BOT
TP1
TP2
TP3FL2010
U2002
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3. TROUBLE SHOOTING
- 42 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
1.5n
C1011
+3V0_VREG_L16+1V8_VREG_S3A
100p
C1007
100p
C1006
C10221n
2.2nC1031
C10352.2n
DNI
L1018
L1002
DNI
C10332.2n
L1016
5.1n
2.2nC1036
DNI
L1022
100n
L1001
L1021
10n
C1030
33p
33pC1027
DNIL1019
LMSW6SGM-F12
U1002
46
45
44
43
42
41
17
40
13
12
18
26
19
31
21
20
38
39
3
28
1
27
2
11
4
22
5
23
24
34
25
32
33
29
35
30
36
16
8
15
10
14
9
37
7
6RX_BAND2_1
RX_BAND2_2
VIO
GSM_HB_RX_1
GND8
GSM_HB_RX_2
RX
_BAND5
_1
GND4
RX
_BAND5
_2
VDD
TRX3
GND14
GSM_LB_TX
GND13
GND12
TRX1
ANT
TX_BAND2
GND11
GND3
TX_BAND1
RX_BAND1_2
GND5
GND2
TX_BAND8
GND1
GSM_HB_TX
RX_BAND1_1
SCLK
SDATA
GND10
TRX2
TRX4
RX
_BAND8
_2
TX_BAND5
RX
_BAND8
_1
GND6
GND7
GND15
GND9
GND16
GND17
GND18
GND19
GND20
GND21
C102612n
SW1001 MS-156C
43
2
1ANT COMMON
G3 G4
DNI
C1014
+3V0
_VREG
_L16
C10231n
C1095
1 0 0p 1 0 0p
C1096
10n
C1097
C1109
1.5n
L1007
1.5n
L1061
DNI
C102812n
U1000RF1602
7 8 9
10
11
12
2
13
1
5
46 3
GND2
GND4
GND3
RF1
GND1
GND7
ANT
GND6
RF2
GND5
VBATT
EN
CTRL
C1001 1n
GRFC20_
SW
GRFC21_
SW
RFFE2_CLK
RFFE2_DATA
PRX_B1_INP
PRX_B1_INM
PRX_G900_INM
PRX_G900_INP
TX_ANT_GSMHB
TX_ANT_GSMLB
TX_ANT_B1
TX_ANT_B2
PRX_B2_INM
PRX_B2_INP
PRX_G1800_G1900_INM
PRX_G1800_G1900_INP
TX_ANT_B5
PRX_B5_G850_INP
PRX_B5_G850_INM
TX_ANT_BC0_BC1_BC10_B25_B26
RF2 (Global)
RF1 (CDMA)
H
LH
CTRLENPath
H
TP1
TP2
+3V0_VREG_L16
L2036
DNI
C207233p
33pC2073
100pC2075C2074
100p
FL2010 XM0831SZ
3
9
7
5 6
1
4
10
8
2GND1
PORT1-
PORT3-
PORT2-
PORT3+
CTLPORT2+
PORT1+
VDD
GND2
14
5
13
4
12
3
11
2
69
78
54
61
43
48
3036
17
23 PRX_MB3_INM
PRX_MB2_INP
PRX_MB2_INM
PRX_MB1_INP
PRX_MB1_INM
PRX_LB3_INP
PRX_LB3_INM
PRX_LB2_INP
PRX_LB2_INM
PRX_LB1_INP
PRX_LB1_INM
DRX_HB_INP
DRX_HB_INM
DRX_MB_INP
DRX_MB_INM
DRX_LB2_INP
DRX_LB2_INM
DRX_LB1_INP
DRX_LB1_INM
PRX_B1_INM
PRX_G900_INM
PRX_G900_INP
PRX_G1800_G1900_INM
PRX_G1800_G1900_INP
PRX_BC1_B2_B25_INP
PRX_BC1_B2_B25_INM
PRX_B5_G850_INP
PRX_B5_G850_INM
DRX_HB_B41_INM
DRX_HB_B41_INP
PRX_SW_SEL1
PRX_B26_BC0_BC10_INP
PRX_B26_BC0_BC10_INM
DRX_MB_B25_BC1_INP
DRX_MB_B25_BC1_INM
DRX_LB_BC0_BC10_B26_INP
DRX_LB_BC0_BC10_B26_INM
H
Path
PRX_B26_BC0_BC10
PRX_B5_G850
CTLVDD
H H
L
TP3
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3. TROUBLE SHOOTING
- 43 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
Check TP1 Signal Exist?
Check TP2 Signal Exist?
Check TP3 Signal Exist?
Yes
Yes
Yes
No
No
No
RF TX Level is OK
Check the U1002(FEMid)
Check the FL2010
Check the U1000
Check the U2002
(WTR1605L)
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3. TROUBLE SHOOTING
- 44 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
3.6 Checking GSM Block
START
Check XO (19.2MHz) Block
Refer to 3.3
BoardCheck the U1000
Refer to 3.4
Check T/RX Level
Re-Download & Cal
Change the Board
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3. TROUBLE SHOOTING
- 45 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
3.6.1 Checking TCXO Block
Refer to 3.3
3.6.2 Checking U1000
Refer to 3.4
3.6.3 Checking RF GSM850 & GSM900 TX level
BOT
TOP
U1000
TP1
TP2
TP3
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3. TROUBLE SHOOTING
- 46 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
Check TP1 Over 31dBm?
Check TP2 Over 31dBm?
Check TP3 Over 6dBm?
Yes
Yes
Yes
No
No
No
RF TX Level is OK
Check the U1002(FEMid)
Check U1001(PAM)
Check the U1000
Check the U2002
(WTR1605L)
L1008
0.5p 2.2u
C1005
1.5n
L1065
DNI
L1011L1010DNI
L1009
0.5p
C1002
2.2n
+1V8_VREG_S3A
3.3nC1010
C1003
1n
L1005
1.2p
10u
C1004
L1004
DNI
33pC1009C1008
33p
1.8n
C1016
L1015DNI
C1021
33p
C1020
33p
L1017
DNI
33pC102533pC1024
L1003
DNI
L1000
DNI
DNIL1006
C1013
1n
C1113
33p
C1114
33p
VPA
+VPWR_RF
VPA_GSM
C1012
1n
C1000
10u
L1064
DNI
DNIL1066 L1067
DNI
U1001ACPM-7700-TR1
43
42
41
40
39
37
38
35
36
34
26
27
28
29
30
31
32
33
23
22
9
12
7
20
21
19
15
2
18
8
10
11
14
16
17
13
1
25
6
5
4
3
24RFOUT_GSM_HB
NC1
RFIN_B5_B8
NC2
VIO
GND12
RFIN_B1_B2
RFIN_GSM_HB
GND6
GND5
RFIN_GSM_LB
VBATT
GND2
SCLK
GND7
RFIN_B3_B4
GND4
GND8
GND10
GND9
GND1
GND3
SDATA
RFOUT_GSM_LB
GND11
RFOUT_B3/B4
RFOUT_B2
RFOUT_B5
NC3
RFOUT_B8VCC1
VCC2
VCC_GSM
NC4
GND13
RFOUT_B1
GND14
CPL_
OUT
GND15
GND16
GND17
GND18
PGND
C1015
3.3n
RFFE1_DATA
RFFE1_CLK
TX_OUT_GSMHB
TX_OUT_GSMLB
TX_OUT_B1_B2
TX_ANT_GSMHB
TX_ANT_GSMLB
TX_ANT_B1
TX_ANT_B2
CPL_GLOBAL
TX_OUT_B5
TX_ANT_B5
B1
B2
G850/G900
G1800/G1900
B5
TP2
TP3
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3. TROUBLE SHOOTING
- 47 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
3.6.4 Checking RF DCS & PCS TX level
BOT
TOP
U1000
TP1
TP2TP3
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3. TROUBLE SHOOTING
- 48 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
Check TP1 Over 28dBm?
Check TP2 Over 28dBm?
Check TP3 Over 6dBm?
Yes
Yes
Yes
No
No
No
RF TX Level is OK
Check the U1002(FEMid)
Check U1001(PAM)
Check the U1000
Check the U2002
(WTR1605L)
L1008
0.5p 2.2u
C1005
1.5n
L1065
DNI
L1011L1010DNI
L1009
0.5p
C1002
2.2n
+1V8_VREG_S3A
3.3nC1010
C1003
1n
L1005
1.2p
10u
C1004
L1004
DNI
33pC1009C1008
33p
1.8n
C1016
L1015DNI
C1021
33p
C1020
33p
L1017
DNI
33pC102533pC1024
L1003
DNI
L1000
DNI
DNIL1006
C1013
1n
C1113
33p
C1114
33p
VPA
+VPWR_RF
VPA_GSM
C1012
1n
C1000
10u
L1064
DNI
DNIL1066 L1067
DNI
U1001ACPM-7700-TR1
43
42
41
40
39
37
38
35
36
34
26
27
28
29
30
31
32
33
23
22
9
12
7
20
21
19
15
2
18
8
10
11
14
16
17
13
1
25
6
5
4
3
24RFOUT_GSM_HB
NC1
RFIN_B5_B8
NC2
VIO
GND12
RFIN_B1_B2
RFIN_GSM_HB
GND6
GND5
RFIN_GSM_LB
VBATT
GND2
SCLK
GND7
RFIN_B3_B4
GND4
GND8
GND10
GND9
GND1
GND3
SDATA
RFOUT_GSM_LB
GND11
RFOUT_B3/B4
RFOUT_B2
RFOUT_B5
NC3
RFOUT_B8VCC1
VCC2
VCC_GSM
NC4
GND13
RFOUT_B1
GND14
CPL_
OUT
GND15
GND16
GND17
GND18
PGND
C1015
3.3n
RFFE1_DATA
RFFE1_CLK
TX_OUT_GSMHB
TX_OUT_GSMLB
TX_OUT_B1_B2
TX_ANT_GSMHB
TX_ANT_GSMLB
TX_ANT_B1
TX_ANT_B2
CPL_GLOBAL
TX_OUT_B5
TX_ANT_B5
B1
B2
G850/G900
G1800/G1900
B5
TP2
TP3
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3. TROUBLE SHOOTING
- 49 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
3.6.5 Checking RF DCS, PCS & GSM900 Rx Block
BOT
TP1
TP2
GSM900 DCS &PCS
U2002
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3. TROUBLE SHOOTING
- 50 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
Check TP1 Signal Exist?
Check TP2 Signal Exist?
Yes
Yes
No
No
RF TX Level is OK
Check the U1002(FEMid)
Check the U1000
Check the U2002
(WTR1605L)
1.5n
C1011
+3V0_VREG_L16+1V8_VREG_S3A
100p
C1007
100p
C1006
C10221n
2.2nC1031
C10352.2n
DNI
L1018
L1002
DNI
C10332.2n
L1016
5.1n
2.2nC1036
DNI
L1022
100n
L1001
L1021
10n
C1030
33p
33pC1027
DNIL1019
LMSW6SGM-F12
U1002
46
45
44
43
42
41
17
40
13
12
18
26
19
31
21
20
38
39
3
28
1
27
2
11
4
22
5
23
24
34
25
32
33
29
35
30
36
16
8
15
10
14
9
37
7
6RX_BAND2_1
RX_BAND2_2
VIO
GSM_HB_RX_1
GND8
GSM_HB_RX_2
RX
_BAND5
_1
GND4
RX
_BAND5
_2
VDD
TRX3
GND14
GSM_LB_TX
GND13
GND12
TRX1
ANT
TX_BAND2
GND11
GND3
TX_BAND1
RX_BAND1_2
GND5
GND2
TX_BAND8
GND1
GSM_HB_TX
RX_BAND1_1
SCLK
SDATA
GND10
TRX2
TRX4
RX
_BAND8
_2
TX_BAND5
RX
_BAND8
_1
GND6
GND7
GND15
GND9
GND16
GND17
GND18
GND19
GND20
GND21
C102612n
SW1001 MS-156C
43
2
1ANT COMMON
G3 G4
DNI
C1014
+3V0
_VREG
_L16
C10231n
C1095
1 0 0p 1 0 0p
C1096
10n
C1097
C1109
1.5n
L1007
1.5n
L1061
DNI
C102812n
U1000RF1602
7 8 9
10
11
12
2
13
1
5
46 3
GND2
GND4
GND3
RF1
GND1
GND7
ANT
GND6
RF2
GND5
VBATT
EN
CTRL
C1001 1n
GRFC20_
SW
GRFC21_
SW
RFFE2_CLK
RFFE2_DATA
PRX_B1_INP
PRX_B1_INM
PRX_G900_INM
PRX_G900_INP
TX_ANT_GSMHB
TX_ANT_GSMLB
TX_ANT_B1
TX_ANT_B2
PRX_B2_INM
PRX_B2_INP
PRX_G1800_G1900_INM
PRX_G1800_G1900_INP
TX_ANT_B5
PRX_B5_G850_INP
PRX_B5_G850_INM
TX_ANT_BC0_BC1_BC10_B25_B26
RF2 (Global)
RF1 (CDMA)
H
LH
CTRLENPath
H
TP1
TP2
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3. TROUBLE SHOOTING
- 51 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
3.6.6 Checking RF GSM850 Rx Block
BOT
TP1
TP3
TP2FL2010
U2002
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3. TROUBLE SHOOTING
- 52 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
1.5n
C1011
+3V0_VREG_L16+1V8_VREG_S3A
100p
C1007
100p
C1006
C10221n
2.2nC1031
C10352.2n
DNI
L1018
L1002
DNI
C10332.2n
L1016
5.1n
2.2nC1036
DNI
L1022
100n
L1001
L1021
10n
C1030
33p
33pC1027
DNIL1019
LMSW6SGM-F12
U1002
46
45
44
43
42
41
17
40
13
12
18
26
19
31
21
20
38
39
3
28
1
27
2
11
4
22
5
23
24
34
25
32
33
29
35
30
36
16
8
15
10
14
9
37
7
6RX_BAND2_1
RX_BAND2_2
VIO
GSM_HB_RX_1
GND8
GSM_HB_RX_2
RX
_BAND5
_1
GND4
RX
_BAND5
_2
VDD
TRX3
GND14
GSM_LB_TX
GND13
GND12
TRX1
ANT
TX_BAND2
GND11
GND3
TX_BAND1
RX_BAND1_2
GND5
GND2
TX_BAND8
GND1
GSM_HB_TX
RX_BAND1_1
SCLK
SDATA
GND10
TRX2
TRX4
RX
_BAND8
_2
TX_BAND5
RX
_BAND8
_1
GND6
GND7
GND15
GND9
GND16
GND17
GND18
GND19
GND20
GND21
C102612n
SW1001 MS-156C
43
2
1ANT COMMON
G3 G4
DNI
C1014
+3V0
_VREG
_L16
C10231n
C1095
1 0 0p 1 0 0p
C1096
10n
C1097
C1109
1.5n
L1007
1.5n
L1061
DNI
C102812n
U1000RF1602
7 8 9
10
11
12
2
13
1
5
46 3
GND2
GND4
GND3
RF1
GND1
GND7
ANT
GND6
RF2
GND5
VBATT
EN
CTRL
C1001 1n
GRFC20_
SW
GRFC21_
SW
RFFE2_CLK
RFFE2_DATA
PRX_B1_INP
PRX_B1_INM
PRX_G900_INM
PRX_G900_INP
TX_ANT_GSMHB
TX_ANT_GSMLB
TX_ANT_B1
TX_ANT_B2
PRX_B2_INM
PRX_B2_INP
PRX_G1800_G1900_INM
PRX_G1800_G1900_INP
TX_ANT_B5
PRX_B5_G850_INP
PRX_B5_G850_INM
TX_ANT_BC0_BC1_BC10_B25_B26
RF2 (Global)
RF1 (CDMA)
H
LH
CTRLENPath
H
TP1
TP2
+3V0_VREG_L16
L2036
DNI
C207233p
33pC2073
100pC2075C2074
100p
FL2010 XM0831SZ
3
9
7
5 6
1
4
10
8
2GND1
PORT1-
PORT3-
PORT2-
PORT3+
CTLPORT2+
PORT1+
VDD
GND2
14
5
13
4
12
3
11
2
69
78
54
61
43
48
30
36
17
23 PRX_MB3_INM
PRX_MB2_INP
PRX_MB2_INM
PRX_MB1_INP
PRX_MB1_INM
PRX_LB3_INP
PRX_LB3_INMPRX_LB2_INP
PRX_LB2_INM
PRX_LB1_INP
PRX_LB1_INM
DRX_HB_INP
DRX_HB_INM
DRX_MB_INP
DRX_MB_INM
DRX_LB2_INP
DRX_LB2_INM
DRX_LB1_INP
DRX_LB1_INM
PRX_B1_INM
PRX_G900_INM
PRX_G900_INP
PRX_G1800_G1900_INM
PRX_G1800_G1900_INP
PRX_BC1_B2_B25_INP
PRX_BC1_B2_B25_INM
PRX_B5_G850_INP
PRX_B5_G850_INM
DRX_HB_B41_INM
DRX_HB_B41_INP
PRX_SW_SEL1
PRX_B26_BC0_BC10_INP
PRX_B26_BC0_BC10_INM
DRX_MB_B25_BC1_INP
DRX_MB_B25_BC1_INM
DRX_LB_BC0_BC10_B26_INP
DRX_LB_BC0_BC10_B26_INM
H
Path
PRX_B26_BC0_BC10
PRX_B5_G850
CTLVDD
H H
L
TP3
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3. TROUBLE SHOOTING
- 53 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
Check TP1 Signal Exist?
Check TP2 Signal Exist?
Check TP3 Signal Exist?
Yes
Yes
Yes
No
No
No
RF TX Level is OK
Check the U1002(FEMid)
Check the FL2010
Check the U1000
Check the U2002
(WTR1605L)
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3. TROUBLE SHOOTING
- 54 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
3.7 SIGNAL PATH (CDMA<E)
1
L
J
1
7
1
1
1
1
11
1
1
1
1
15 1
C9027
C2024
C9035
L2014
U9006
L2013
L2024
R3022
C2008
R3023
U2001L2007
C9033
C2016
ANT2002
FL9003
U90
04FL9001
R2001
L2027
FB10006
C9036
SW2001
FL9
L
C9032
VA10011
C2022
C2084
L2025C2023
C2012
VA10009
C9030
C2026
C9001
SW2002
C9005
L
C2006 ZD9005
L
L
ANT2003
L
C9006
R2009
L2021
L2012
C9031
L2022
FL2004
L2050
C9002
C9003
U9005
C9026
C2020
CN9001
U2000
C2018
C2021
C2010
C10029
C2082
R2000
1
B23,BC1 RTX
B26,B10,BC0 RTX
B41 RTX
B25, BC1 DRX
B26, BC0,BC10 DRX
B41 DRX
BOT
BOT
TOP
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3. TROUBLE SHOOTING
- 55 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
START
Re download S/W & Cal
1. Check DC Power Supply circuit
2. Check XO
3. Check RF Signal path
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3. TROUBLE SHOOTING
- 56 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
3.7.1 Checking RF TX Level(CDMA BC0,BC10<E B26)
BOT
TP1
TP3
TP4
TP2
U1004
PAM
L1002
DNI100n
L1001
SW1001 MS-156C
43
2
1ANT COMMON
G3 G4
+3V0
_VREG
_L16
C1095
1 00 p 1 00 p
C1096
10n
C1097
C1109
1.5n
L1061
DNI
U1000RF1602
7 8 9
10
11
12
2
13
1
5
46 3
GND2
GND4
GND3
RF1
GND1
GND7
ANT
GND6
RF2
GND5
VBATT
EN
CTRL
C1001 1n
GRFC20
_SW
GRFC21
_SW
TP1
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3. TROUBLE SHOOTING
- 57 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
L1037
DNI
10nC1060
C1057
DNI
VPA
U1004
ACPM-5805-TR2
6
7 4
8 3
5
9 210 1
11PGND
VCC1VCC2
RFINRFOUT
VEN
NCISO
VMODEGND
CPL
L10366.8n
2.2uC1059
CPL_B25
CPL_B26
TX_BC0_B10_B26
TP2
C105233p
C1065
100p100p
C1064
+VPWR_RF
100pC1054
C1063
2.2u
FL1004
LFL18829MTCRD627
43
52
61IN G3
G1 NC
O UT G 2
U1004
ACPM-5805-TR2
6
7 4
8 3
5
9 2
10 1
11PGND
VCC1VCC2
RFINRFOUT
VEN
NCISO
VMODEGND
CPL
C1055
DNI
C1058
DNI
C1062
330p
PA_ON1_B26
PA1_R0_B26
TP4TP3
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3. TROUBLE SHOOTING
- 59 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
3.7.2 Checking RF TX Level(CDMA BC1 & LTE B25)
BOT
L1002
DNI100n
L1001
SW1001 MS-156C
43
2
1ANT COMMON
G3 G4
+3V0
_VREG
_L16
C1095
1 00 p 1 00 p
C1096
10n
C1097
C1109
1.5n
L1061
DNI
U1000RF1602
7 8 9
10
11
12
2
13
1
5
46 3
GND2
GND4
GND3
RF1
GND1
GND7
ANT
GND6
RF2
GND5
VBATT
EN
CTRL
C1001 1n
GRFC20
_SW
GRFC21
_SW
TP1
TP1 TP3
TP4TP2
U1003
PAM
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3. TROUBLE SHOOTING
- 60 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
C1043
2.2u
VPA U1003
SKY77762
6 5
7 4
8 3
9 2
10 1
11PGND
VCC1VCC2
RFINRFOUT
VMODE_1CPL_IN
VMODE_0GND
VENCPL_OUT
L1030
1p 10n
C1044L1042
1p
L1028
3.9n
CPL_B25
CPL_GLOBALTP2
C1042
DNIC1046
330p 2.2u
C1047
100p
L1029
+VPWR_RF
C1049
100p
U1003
SKY77762
6 5
7 4
8 3
9 2
10 1
11PGND
VCC1VCC2
RFINRFOUT
VMODE_1CPL_IN
VMODE_0GND
VENCPL_OUT
C1048
100p
C1040
3.3n TX_OUT_B25_BC1
PA_ON0_B25PA0_R1_B25
TP4
TP3
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3. TROUBLE SHOOTING
- 61 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
PAM control signal
PA_ON1_U1003 (C1049) : PAM Enable (VEN)
PA0_R1 (C1048) : PAM Gain Control (VMODE)
PA_ON1_U1004 (VEN) must be HIGH (over 2.6V)
Check TP2(L1036) at U1003
Check Over 21 dBm?
Check TP4(C1064) at U1003
Check PA_R1 : 2.6V
Check TP3(C1054) at U1003 (PA_ON)
Check OVER -3dBm?
START Set the phone Tx is ON PDM is 90
Change the board
Yes
Yes
Yes
No
No
No
PAM circuits OK See next page
Check MS8974 OK
Check WTR1605L OK
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3. TROUBLE SHOOTING
- 62 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
3.7.3 Checking RF TX Level(LTE B41)
BOT
TOP
B41
SW1003
RF Switch
U1010
RF/TX SPDT
TP1
TP4
TP2
TP3
U1007
PAM
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3. TROUBLE SHOOTING
- 63 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
100p
C1073
100p
C1084
DNI
L1045L1060
100n
SW1003 MS-156C
43
2
1ANT COMMON
G3 G4
C1079
100p
DNI
L1046
U1010RF1602
7 8 9
10
11
12
2
13
1
5
46 3
GND2
GND4
GND3
RF1
GND1
GND7
ANT
GND6
RF2
GND5
VBATT
EN
CTRL
10n
C1112
+3V0
_VREG
_L16
SW
_B41
SW
_B41
_EN
TP1
L20335.6n
L2034
3.3n
C2035
100p 100p
C2036
DNI
C2038
C2085
3.3n DNI
L2051
TX_OUT_B41
TP3
C1092
2.2u 100p
C1093
L1050
1p
100p
C1094
VPA_GSM
+VPWR_RF
C1089
10n
C1091
330p
C1090
330p2.2u
C1088
U1007
ACPM-9041-TR1
6
7 4
8 3
5
9 2
10 1
11PGND
VCC1VCC2
RFINRFOUT
VEN
NCISO
VMODEGND
CPL
C1086
DNI
L10481.8n
TX_OUT_B41
PA1_R1_B41PA_ON2_B41
CPL_B26
CPL_PDET
TP2 TP4
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3. TROUBLE SHOOTING
- 64 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
PAM control signal
PA_ON2 (C1092) : PAM Enable
PA_R1 (C1093) : PAM Gain Control
PA_ON2 (C1092) must be HIGH (over 2.6V)
Check TP2(L1048) at U1007
Check Over 21 dBm?
Check TP4(C1093) at U1007
Check PA_R1 : 2.6V
Check TP3(L2033) at U1007 (PA_ON)
Check OVER -3dBm?
START Set the phone Tx is ON PDM is 90
Change the board
Yes
Yes
Yes
No
No
No
PAM circuits OK See next page
Check MS8974 OK
Check WTR1605L OK
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3. TROUBLE SHOOTING
- 65 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
3.7.4 Checking RF PRX Level(CDMA BC0,BC10 & LTE B26)
BOT
L1002
DNI100n
L1001
SW1001 MS-156C
43
2
1ANT COMMON
G3 G4
+3V0
_VREG
_L16
C1095
1 00 p 1 00 p
C1096
10n
C1097
C1109
1.5n
L1061
DNI
U1000RF1602
7 8 9
10
11
12
2
13
1
5
46 3
GND2
GND4
GND3
RF1
GND1
GND7
ANT
GND6
RF2
GND5
VBATT
EN
CTRL
C1001 1n
GRFC20
_SW
GRFC21
_SW
TP1
TP1
TP3TP4
TP2
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3. TROUBLE SHOOTING
- 66 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
+3V0_VREG_L16
L2036
DNI
C207233p
33pC2073
100pC2075C2074
100p
FL2010 XM0831SZ
3
9
7
5 6
1
4
10
8
2GND1
PORT1-
PORT3-
PORT2-
PORT3+
CTLPORT2+
PORT1+
VDD
GND2
PRX_B5_G850_INP
PRX_B5_G850_INM
PRX_SW_SEL1
PRX_B26_BC0_BC10_INP
PRX_B26_BC0_BC10_INM
H
Path
PRX_B26_BC0_BC10
PRX_B5_G850
CTLVDD
H H
L
TP2
TP3
C1100
1.2p 3p
C1102
1.2pC1099
100pC1104L1054
12n
L1051
5.6n
L1052
5.6n
L1055
12n
15n
L1056
L1030
1p
100pC1103
L1042
1p
C11013p
U1009ACFM-7526-TR1
17
9
8
10
7
11
6
12
5
13
4
14
3
15
2
16
1BAND_26_RX
GND11
GND1
BAND_
25_
RX
GND2
GND10
GND3
GND9
BAND_25_TX
GND8
GND4
ANT
BAND_
26_
TX
GND7
GND5
GND6
GND12
L1028
3.9n
PRX_B25_BC1_INM
PRX_B25_BC1_INP
TX_BC0_B10_B26
TP4
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3. TROUBLE SHOOTING
- 67 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
Check if there is any major difference between
TP1 Signal Exist?
Check if there is any major difference between
TP4 Signal Exist?
Check TP2 at FL2010
Check PRX SW_SEL : 1.6V
Check if there is any major difference between
TP3 Signal Exist?
START
Replace Main board
Yes
Yes
Yes
Yes
No
No
No
No
U1000 RF SPDT
U1005 Quadlxer
FL2010 SP4T
WTR1605L
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3. TROUBLE SHOOTING
- 68 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
3.7.5 Checking RF DRX Level(CDMA BC0,BC10& LTE B26)
BOT
TP3
TP2
TP1
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3. TROUBLE SHOOTING
- 69 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
C2010
100p
100p
C2014
100p
C2003
FL2002XM2400SB-DL1201
1112 10
9
54 6
3 7
2 8
1VCTL1
PORT2ANT
GND3VCTL3
GND2
PORT
3
GND1
GND4
GND5
PORT1
VCTL2
100p
C2083
L2050
DNI
MS-156CSW2001
ANT1
COMMON2
G3
3
G4
4
100n
L2014
DRX_SW_SEL
DRX_SW_SEL_800
DRX_SW_SEL_2100
TP2
TP1
12nL2029
FL2005
SAFFB876MFL0F0A
U_BP1
BP14
G1
2
BP23
G2
5
33pC2030
12n
L2031
C2029
33p
C2028100p
100p
C2031L203212n
22nL2030
DRX_LB_BC0_BC10_B26_INP
DRX_LB_BC0_BC10_B26_INM
TP3
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3. TROUBLE SHOOTING
- 70 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
Check if there is any major difference between
TP1 Signal Exist?
Check TP2 at FL2002
Check DRX SW_800 : 1.6V
Check if there is any major difference between
TP3 Signal Exist?
START
Replace Main board
Yes
Yes
Yes
No
No
No
U1000 FL2002
Check FL2005
WTR1605L
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3. TROUBLE SHOOTING
- 71 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
3.7.6 Checking RF PRX Level(CDMA BC1 & LTE B25)
BOT
L1002
DNI100n
L1001
SW1001 MS-156C
43
2
1ANT COMMON
G3 G4
+3V0
_VREG
_L16
C1095
1 00 p 1 00 p
C1096
10n
C1097
C1109
1.5n
L1061DNI
U1000RF1602
7 8 9
10
11
12
2
13
1
5
46 3
GND2
GND4
GND3
RF1
GND1
GND7
ANT
GND6
RF2
GND5
VBATT
EN
CTRL
C1001 1n
GRFC20
_SW
GRFC21
_SW
TP1
TP1
TP3
TP4
TP2
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3. TROUBLE SHOOTING
- 72 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
FL1001
XMSSJE3G0PA-003TMP
3
9
7
5 6
1
4
10
8
2GND1
PORT1-
PORT3-
PORT2-
PORT3+
CTLPORT2+
PORT1+
VDD
GND2
+3V0_VREG_L16
100p
C1037 C1038
100p
33pC1034
33pC1029
L1020
5.6n
PRX_SW_SEL0
PRX_B25_BC1_INM
PRX_B25_BC1_INP
PRX_B2_INM
PRX_B2_INP
PRX_BC1_B2_B25_INP
PRX_BC1_B2_B25_INM
TP3
TP2
C1115
0.3p
C1100
1.2p 3p
C1102
1.2pC1099
100pC1104
L1054
12n
L1051
5.6n
L1052
5.6n
L1055
12n
C10432.2u
VPA U1003
SKY77762
6
7
8
9
10
11PGND
VCC2
RFOUT
CPL_IN
GND
CPL_OUT
15n
L1056
L1030
1p
2.2n
L1025
100pC1103
10n
C1044L1042
1p
C11013p
U1009ACFM-7526-TR1
17
9
8
10
7
11
6
12
5
13
4
14
3
15
2
16
1BAND_26_RX
GND11
GND1
BAND_
25_
RX
GND2
GND10
GND3
GND9
BAND_25_TX
GND8
GND4
ANT
BAND_
26_
TX
GND7
GND5
GND6
GND12
L1028
3.9n
CPL_B25
CPL_GLOBAL
PRX_B25_BC1_INM
PRX_B25_BC1_INP
TX_ANT_BC0_BC1_BC10_B25_B26
PRX_B26_BC0_BC10_INP
PRX_B26_BC0_BC10_INM
TX_BC0_B10_B26
TP4
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3. TROUBLE SHOOTING
- 73 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
Check if there is any major difference between
TP1 Signal Exist?
Check if there is any major difference between
TP4 Signal Exist?
Check TP2 at FL1001
Check PRX SW_SEL : 1.6V
Check if there is any major difference between
TP3 Signal Exist?
START
Replace Main board
Yes
Yes
Yes
Yes
No
No
No
No
U1000 RF SPDT
U1005 Quadlxer
FL1001 SPDT
WTR1605L
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3. TROUBLE SHOOTING
- 74 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
3.7.7 Checking RF DRX Level(CDMA BC1 & LTE B25)
BOT
TP3
TP4TP2
TP1
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3. TROUBLE SHOOTING
- 75 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
C2010
100p
100p
C2014
100p
C2003
FL2002XM2400SB-DL1201
1112 10
9
54 6
3 7
2 8
1VCTL1
PORT2ANT
GND3VCTL3
GND2
PORT
3
GND1
GND4
GND5
PORT1
VCTL2
100p
C2083
L2050
DNI
MS-156CSW2001
ANT1
COMMON2
G3
3
G4
4
100n
L2014
DRX_SW_SEL
DRX_SW_SEL_800
DRX_SW_SEL_2100
TP1
TP2TP3
SAWFD1G96BH0F0A
FL20031
9
4
6
2 7
3 8
5 10GND6GND3
GND5GND2
GND4GND1
Balance_Port_1
Unbalance_Port_Hch
Balance_Port_2
Unbalance_Port_Lch
L2045
DNIDNI
L2044
L2046DNI
L2047DNI
C2002
3.9n
L2042
100p
3.3n
L2043
100p
L2041
33p
C2078
C2079
33p
L2037
6.8n
47p
C2013
DRX_MB_B25_BC1_INP
DRX_MB_B25_BC1_INM
TP4
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3. TROUBLE SHOOTING
- 76 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
Check if there is any major difference between
TP1 Signal Exist?
Check TP2,TP3 at FL2002
Check DRX SW, DRX SW_2100 : 1.6V
Check if there is any major difference between
TP3 Signal Exist?
START
Replace Main board
Yes
Yes
Yes
No
No
No
U1000 FL2002
Check FL2003
Check WTR1605L FL2003
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3. TROUBLE SHOOTING
- 77 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
3.7.8 Checking RF PRX Level(LTE 41)
BOT
TP1
TP3
TP2
100p
C1073
100p
C1084
DNI
L1045L1060
100n
SW1003 MS-156C
43
2
1ANT COMMON
G3 G4
C1079
100p
DNI
L1046
C1110
33p
U1010RF1602
7 8 9
10
11
12
2
13
1
5
46 3
G
ND2
G
ND4
G
ND3
RF1
G
ND1
G
ND7
ANTG
ND6
RF2
G
ND5
VBATT
EN
CTRL
10n
C1112
+3V0
_VREG
_L16
SW
_B41
SW
_B41
_EN
TP1
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3. TROUBLE SHOOTING
- 78 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
Check TP1(C1073) Signal Exist?
Check TP2 (C1072) Signal Exist?
Check TP3(L1041) Signal Exist?
Yes
Yes
Yes
No
No
No
Check U1010 SPDT SW
Check U1006 SAW FILTE
Check WTR1605L
START
Replace Main board
U1006ACPF-70412 1
3
GND
TX/RXANT
FL1007
HHM1918A2
3
12
4GND
UNBAL BALAN1
BALAN2
12pC1075
L1040
100p
DNI
C1074
100p
C1072
C106812p
L1041
1.8n
L1044
100p
PRX_B41_INP
PRX_B41_INM
TP3
TP2
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3. TROUBLE SHOOTING
- 79 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
3.7.9 Checking RF DRX Level(LTE 41)
BOT
TP3
5 C9027
4
C2025
C
2024
C9035
L2014
L2013
L2024
C2008
U2001L2007
C9033
C2016
U
R
2001
L2027
SW2001
C9032
0011
C2022
C
2084
L2025C2023
C2012
C2026
C9001
C2027
C2006 ZD9005
L2021
L2012L2022
FL2004
L2050
C2020
U2000
C2018
C2021
C2010
C10029
C2082
R2000
TP1
TP2
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3. TROUBLE SHOOTING
- 80 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
2.2n
C2026MS-156CSW2002
43
2
1ANT COMMON
G3 G4
15n
L2027C2082
100n
FL2004 B9839
108
9
4
75
1
632
G1
G2
G4
ANT
G3
G7
GPS/GLONASS_OUT
Non-GPS/GLONASS_OUT
G5
G6
3n
C2006
U2000ACPF-7041
GND
3
TX/RX1
ANT2
HHM1918A2
FL2001
3
12
4GND
UNBAL BALAN1
BALAN2
DNI
C2008
L2005
DNI
L2002
1.2n
L20101.2n
C200912p
C2084
100p
DNI
L2007
L2004
2.7n
C200112p
DRX_HB_B41_INM
DRX_HB_B41_INPTP3
TP2
TP1
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3. TROUBLE SHOOTING
- 81 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
Check TP1(C2026) Signal Exist?
Check TP2 (C2084) Signal Exist?
Check TP3(L2004) Signal Exist?
Yes
Yes
Yes
No
No
No
Check FL2004 SPDT
Check FL2001 Balan FILTE
Check WTR1605L
START
Replace Main board
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3. TROUBLE SHOOTING
- 82 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
3.8 GPS/WIFI/BT Module
3.8.1 GPS Module
The WTR1605L is integrated GPS solution.
Reference Description
U2000 SAW FILTER
U2001 PAM
SW2002 RF SWITCH
FL2004 SEPARATOR
ANT12004/5 ANTENNA CONTACT
ANT2005 C9027
ANT2004
C
2025
C2024
U9006
L
L2024
C2008
L2026
U2001L2007
C
C2016
U9004
R2001
L202
7
C
9032
C2022
C2084
L2025C2023
C2026
SW2002
C2027
C2006
L2021
L
C9031
L2022
FL2004
C2020
U2000
C2018
C2021
C10029
C2082
R2000
BOT
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3. TROUBLE SHOOTING
- 83 - Copyright 2013 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
3.8.2 WIFI,BT Module
BCM4335(Module) is the combination module that integrates WLAN(WIFI), BT and FM.
Reference Description
ANT14000 Antenna Contact(GND)
ANT14001 Antenna Contact(Feeding)
FL14002 2.4GHz BPF
U15012 WiFi/BT chip
TOP BOT
U15012
FL14002
ANT1401
ANT1400
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