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Internal Use Only
Service Manual
LG-D410H
Date: April, 2014 /Issue 1.0
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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 Main Parts : GSM Solution .....................................................................5
2.4 HW Features ...............................................................................................6
2.5 SW Features ................................................................................................9
2.6 HW SPEC. ................................................................................................. 12
3. TROUBLE SHOOTING .......................................................... 21
3.1 RF Component ....................................................................................... 21
3.2 SIGNAL PATH ........................................................................................... 23
3.3 Checking XO Block ................................................................................ 26
3.4 Checking FEMID (GSM, W B1/B2/B8) Block ................................. 28
3.5 Checking WCDMA Block .................................................................... 31
3.6 Checking GSM Block ............................................................................ 58
3.7 GPS/WIFI/BT.............................................................................................65
3.8 GPS/WIFI/BT SIGNAL PATH ................................................................ 67
3.9 Checking GPS/WIFI/BT ........................................................................ 69
3.10 Audio Trouble ....................................................................................... 75
3.11 Main Camera Trouble Shooting .................................................... 85
3.12 Main LCD Trouble Shooting ........................................................... 88
3.13 Touch troubleshooting ..................................................................... 90
3.14 Compass sensor troubleshooting ................................................ 93
3.15 Proximity Sensor troubleshooting............................................... 95
3.16 Power ON Troubleshooting ............................................................ 97
3.17 Charging Troubleshooting ............................................................1003.18 USB Trouble shooting .....................................................................103
4. DOWNLOAD ....................................................................... 108
5. BLOCK DIAGRAM ............................................................... 125
6. CIRCUIT DIAGRAM ............................................................ 135
7. BGA PIN MAP ....................................................................151
8. PCB LAYOUT ....................................................................... 158
9. CALIBRATION .....................................................................162
10. HIDDEN MENU ................................................................. 181
11. DISASSEMBLE GUIDE ...................................................... 189
12. EXPLODED VIEW & REPLACEMENT PART LIST ............. 194
12.1 Exploded View ...................................................................................194
12.2 Replacement Parts ...........................................................................195
12.3 Accessory .............................................................................................226
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1. INTRODUCTION
1.1 Purpose
This manual provides the information necessary to repair, calibration, description and download the features of
this model.
1.2 Regulatory Information
A. Security
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.
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 these changes
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 Limitations
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.
1. INTRODUCTION
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1. INTRODUCTION
E. Notice of Radiated Emissions
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.
F. Pictures
The pictures in this manual are for illustrative purposes only; your actual hardware may look slightly different.
G. Interference and Attenuation
A phone may interfere with sensitive laboratory equipment, medical equipment, etc. Interference from
unsuppressed engines or electric motors may cause problems.
H. Electrostatic Sensitive Devices
ATTENTION
Boards, which contain Electrostatic Sensitive Device (ESD), are indicated by the sign.
Following information is ESD handling:
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.
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2. PERFORMANCE
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2. PERFORMANCE
2.1 Product Name
LG- D410H : WCDMA850/1900/2100+EGSM/GSM850/DCS1800/PCS1900(HSPA + / GPRS Class 12 / EDGE Class 12)
2.2 Supporting Standard
2.3 Main Parts : GSM Solution
Item Part Name Comment
Digital Baseband MSM8226 : Qualcomm
Analog Baseband MSM8226 : Qualcomm
RF Chip WTR2605 : Qualcomm
Item Feature Comment
Supporting Standard WCDMA(FDD1,2,8)/
EGSM/GSM850/DCS1800/PCS1900
Frequency Range WCDMA(FDD1) TX : 1920 1980 MHz
WCDMA(FDD1) RX : 2110 2170 MHz
WCDMA(FDD2) TX : 1852.4 1907.6 MHz
WCDMA(FDD2) RX : 1932.4 1987.6 MHz
WCDMA(FDD5) TX : 824 849 MHz
WCDMA(FDD5) RX : 869 894 MHz
EGSM TX : 880 915 MHz
EGSM RX : 925 960 MHz
GSM850 TX : 824 849 MHz
GSM850 RX : 869 894 MHz
DCS1800 TX : 1710 1785 MHz
DCS1800 RX : 1805 1880 MHz
PCS1900 TX : 1850 1910 MHz
PCS1900 RX : 1930 1990 MHz
Application Standard WAP 2.0
WCDMA(FDD1,2,5)/
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2. PERFORMANCE
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Item Part Name Comment
Form Factor DOP type
Battery 1) Capacity
Standard : Li-Ion, 2460mAh
2) Packing Type : Changeable
Size Standard : 133.55 x 66.02 x 9.65
Weight 124g With Battery
Volume 62cc Without Batter
PCB 10 Any Layers , 0.8t
Charging time 4.3hrs @ Power Off / 2540mAh
RX sensitivity WCDMA(FDD1) : -106.7 dBm
WCDMA(FDD2) : -106.7 dBm
WCDMA(FDD5) : -103.7 dBm
EGSM : -105 dBm
GSM850 : -105 dBmDCS 1800 : -105 dBm
PCS 1900 : -105 dBm
TX
output
power
WCDMA/
GSM/
GPRS
WCDMA : 24dBm/3.84MHz,+1/-3dBm
EGSM : 33 dBm
GSM850 : 33 dBm
DCS 1800 : 30 dBm
PCS 1900 : 30 dBm
Class3(WCDMA)
Class4 (EGSM)
Class4 (GSM850)
Class1 (PCS)
Class1 (DCS)
EDGE GSM850 : 27 dBm
GSM 900 : 27 dBm
DCS 1800 : 26 dBm
PCS 1900 : 26 dBm
E2 (GSM900)
E2 (PCS)
E2 (DCS)
GPRS compatibility GPRS Class 12
EDGE compatibility EDGE Class 12
SIM card type Plug-In SIM
3V /1.8V
Display Main LCD(qHD)
TFT Main LCD(4. 7,960 x 540)
Built-in Camera 5M AF / 1.3M VT
2.4 HW Features
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2. PERFORMANCE
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Status Indicator N/A
Keypad Function Key : 4
Side Key : 3
Function Key:
Home, Back,
menu,
SIM-switch
Side Key : Volume up,
down, power key
ANT Main : Internal Fixed Type
System connector 5 Pin micro USB
Ear Phone Jack 3.5Phi, 4 Pole, Stereo
PC synchronization Yes
Memory NAND Flash : 8GByte
SDRAM : 1GByte
Speech coding FR, EFR, HR, AMR
Data & Fax Built in Data & Fax support
Vibrator Built in Vibrator
BlueTooth V4.0
MIDI(for Buzzer
Function)
128 Poly
Music Player MP3,AAC,(e)AAC+,WMA,RA,WAV
Video Player Playback : 30fps 1080p (H.264/263, MPEG4/2,
WMV9, VC1, VP8, DivX, XVID)
Recording : 30fps 1080p (H.264/263, MPEG4/8)
30fps 720p (Wi-Fi display)
Camcorder MPEG4/8
Voice Recording Yes
Speaker Phone mode
Support
Yes
Travel Adapter Yes In-box item
CDROM No
Stereo Headset Yes
Data Cable Yes In-box item
T-Flash(External
Memory)
Yes
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2. PERFORMANCE
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Specification
GSM WCDMA
Stand by current
(Sleep & Idle Avg.)
Under 4.5mA @ P.P 5 Under 4.5mA @ DRX 7
Talk current
Under 400 mA
@GSM Level 5
Under 600mA
@ Max Power Avg.
Under 400 mA
@ Tx -10dBm Avg.
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2. PERFORMANCE
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Item Feature Comment
RSSI 0 ~ 5 Levels
Battery Charging 0 ~ 20 Levels
Key Volume 0 ~ 7 Level
Audio Volume 1 ~ 15 Level
Time / Date Display Yes
Multi-Language Yes Support total 41 languages[English/Spanish/French/Korean/Chi
nese(Simplified)/Chinese(Traditional
)/]
Quick Access Mode Phone / Messaging / Browser/
Applications
Phone / Contact / Messaging /
Applications
PC Sync Yes
Speed Dial Yes Voice mail center -> 1 key
Profile Yes not same with feature phone setting
CLIP / CLIR Yes
Phone Book Name / Number / Email / Groups /
Postal addresses / Organizations / IM
/ Note / Nickname / Website / Event /
There is no limitation on the number
of items.
It depends on available memory
amount.
Last Dial Number Yes
Last Received Number Yes
Last Missed Number Yes
Search by
Number/Name
Yes
Group Yes There is no limitation on the number
of items.
It depends on available memory
amount.
Fixed Dial Number Yes
Service Dial Number No
2.5 SW Features
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2. PERFORMANCE
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Own Number Yes My Profile (add/edit/delete are
supported)
Voice Memo Yes Support voice recorder
Call Reminder No
Network Selection Automatic
Mute Yes
Call Divert Yes
Call Barring Yes
Call Charge (AoC) No
Call Duration Yes
SMS (EMS) There is no limitation on the number
of items.
It depends on available memory
amount.
EMS does not support.
SMS Over GPRS Yes
EMS Melody / PictureSend / Receive / Save
No
MMS MPEG4
Send / Receive / Save
Yes
Long Message MAX 2000 characters The standard of Open vender
Cell Broadcast Yes
Download Over the Web
Game No
Calendar Yes
Memo Yes There is no limitation on the number
of items.
It depends on available memory
amount.
World Clock Yes
Unit Convert No
Stop Watch Yes
Wall Paper Yes
WAP Browser No Support only web browser based on
webkit. WAP stack and wml are not
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2. PERFORMANCE
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supported.
Download Melody /
Wallpaper
Yes Over web browser
SIM Lock No
SIM Toolkit No
MMS Yes Google MMS Client
EONS Yes
CPHS Yes V4.2
ENS Yes
Camera Yes 8M AF /
Digital Zoom : x4
JAVA No
Voice Dial No US English only
IrDa YesBluetooth Yes Ver. 4.0 [HSP, HFP, A2DP, AVRCP, PBAP,
FTP(Server only), OPP, MAP, HID,
PAN]
FM radio Yes
GPRS Yes Class 12
EDGE Yes Class 12
Hold / Retrieve Yes
Conference Call Yes Max. 6DTMF Yes
Memo pad No
TTY No
AMR Yes
SyncML No
IM Yes Google Talk
Email Yes
Item Feature Comment
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2. PERFORMANCE
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Item Specification
Phase ErrorRms : 5
Peak : 20
Frequency ErrorGSM : 0.1 ppm
DCS/PCS : 0.1 ppm
EMC(Radiated Spurious Emission
Disturbance)GSM/DCS : < -28dBm
Transmitter Output power and
Burst Timing
GSM : 5dBm 33dBm 2dB
DCS/PCS : 0dBm 30dBm 2dB
Burst Timing
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2. PERFORMANCE
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Item Specification
Transmit Frequency Band1 : 1920 MHz ~ 1980 MHz
Band2 : 1852 MHz ~ 1907.6 MHz
Band5 : 824MHz ~ 849MHz
Maximum Output Power +24 dBm / 3.84 MHz, +1 / -3 dB
Frequency Error within 0.1 PPM
Open Loop Power Control Normal Conditions : within 9 dB,
Extreme Conditions : within 12 dB
Minimum Transmit Power < -50 dBm /3.84 MHz
Occupied Bandwidth < 5 MHz at 3.84 Mcps (99% of power)
Adjacent Channel Leakage
Power Ratio (ACLR)
> 33 dB @ 5 MHz,
> 43 dB @ 10 MHz
Spurious Emissions
|f-fc| > 12.5 MHz
< -36 dBm / 1 kHz RW @ 9 kHz f < 150 kHz
< -36 dBm / 10 kHz RW @ 150 KHz f < 30 MHz
< -36 dBm / 100 kHz RW @ 30 MHz f < 1 GHz
< -30 dBm / 1 MHz RW @ 1 GHz f < 12.75 GHz
< -60 dBm / 3.84 MHz RW @ 880 MHz f 915 MHz
< -60 dBm / 3.84 MHz RW @ 1920 MHz f 1980 MHz
< -67 dBm / 100 kHz RW @ 925 MHz f 935 MHz
< -79 dBm / 100 kHz RW @ 935 MHz < f 960 GHz
< -71 dBm / 100 kHz RW @ 1805 MHz f 1880 MHz
< -41 dBm / 300 kHz RW @ 1884.5 MHz < f < 1919.6 MHz
Transmit Intermodulation < -31 dBc @ 5 MHz & < -41 dBc @ 10 MHz
when Interference CW Signal Level = -40 dBc
Error Vector Magnitude < 17.5 %, when Pout -20 dBm
Peak Code Domain Error < -15 dB at Pout -20 dBm
2) WCDMA transmitter specification
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2. PERFORMANCE
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Item Specification
Receive Frequency Band1 : 2110 MHz ~ 2170 MHz
Band2 : 1932.4 MHz ~ 1987.6 MHz
Band5 : 869 MHz ~ 894MHz
Reference Sensitivity Level Band1 : BER < 0.001 when or = -106.7 dBm / 3.84 MHz
Band8 : BER < 0.001 when or = -103.7 dBm / 3.84 MHz
Maximum Input Level BER < 0.001 when or = -25 dBm / 3.84 MHz
Adjacent Channel Selectivity
(ACS)
ACS > 33 dB where BER < 0.001 when
or = -92.7 dBm / 3.84 MHz
& Ioac = 52 dBm / 3.84 MHz @ 5 MHz
Blocking Characteristic BER < 0.001 when or = -103.7 dBm / 3.84 MHz
& Iblocking = -56 dBm / 3.84 MHz @ Fuw(offset) = 10 MHz
or Iblocking = -44 dBm / 3.84 MHz @ Fuw(offset) = 15 MHz
Spurious Response BER < 0.001 when or = -103.7 dBm / 3.84 MHz
& Iblocking = -44 dBm
Intermodulation BER < 0.001 when or= -103.7 dBm / 3.84 MHz
& Iouw1 = -46 dBm @ Fuw1(offset) = 10 MHz
& Iouw2 = -46 dBm / 3.84 MHz @ Fuw2(offset) = 20 MHz
Spurious Emissions < -57 dBm / 100 kHz BW @ 9 kHz f < 1 GHz
< -47 dBm / 1 MHz BW @ 1 GHz f 12.75 GHz
Inner Loop Power Control
In Uplink
Adjust output(TPC command)
cmd 1dB 2dB 3dB
+1 +0.5/1.5 +1/3 +1.5/4
0 -0.5/+0.5 -0.5/+0.5 -0.5/+0.5
-1 -0.5/-1.5 -1/-3 -1.5/-4
group(10equal command group)
+1 +8/+12 +16/+24
3) WCDMA receiver specification
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2. PERFORMANCE
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4) HSDPA transmitter specification
Item Specification
Transmit Frequency
Band1 : 1920 MHz ~ 1980 MHz
Band2 : 1852 MHz ~ 1907.6 MHz
Band5 : 824MHz ~ 849MHz
Maximum Output Power
Sub-Test
1=1/15, 2=12/15 21~25dBm / 3.84 MHz
3=13/15 4=15/8 20~25dBm / 3.84 MHz
5=15/7 6=15/0 19~25dBm / 3.84 MHz
HS-DPCCH
Sub-
test in
table
C.10.1.4
Power
step
Power step
slot boundary
Power
step
size, P
[dB]
Transmitter power
step tolerance [dB]
5
1Start of
Ack/Nack6 +/- 2.3
2 Start of CQI 1 +/- 0.6
3 Middle of CQI 0 +/- 0.6
4 End of CQI 5 +/- 2.3
Spectrum Emission Mask
Sub-Test : 1=1/15, 2=12/15, 3=13/15, 4=15/8, 5=15/7, 6=15/0
Frequency offset
from carrierfMinimum requirement
Measurement
Bandwidth
2.5 ~ 3.5 MHz -35-15(f-2.5)dBc 30 kHz
3.5 ~ 7.5 MHz -35-1(f-3.5)dBc 1 MHz
7.5 ~ 8.5 MHz -35-10(f-7.5)dBc 1 MHz
8.5 ~ 12.5 MHz -49dBc 1 MHz
Adjacent Channel
Leakage
Power Ratio (ACLR)
Sub-Test : 1=1/15, 2=12/15, 3=13/15, 4=15/8, 5=15/7, 6=15/0
> 33 dB @ 5 MHz
> 43 dB @ 10 MHz
Error Vector Magnitude < 17.5 %, when Pout -20 dBm
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2. PERFORMANCE
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5) HSDPA receiver specification
Item Specification
Receive Frequency Band1 : 2110 MHz ~ 2170 MHz
Band2 : 1932.4 MHz ~ 1987.6 MHz
Band5 : 869 MHz ~ 894MHz
Maximum Input Level
(BLER or R), 16QAM Only
Sub-Test : 1=1/15, 2=12/15, 3=13/15, 4=15/8, 5=15/7, 6=15/0
BLER < 10% or R >= 700kbps
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2. PERFORMANCE
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Item Specification
Transmit Frequency 2400 MHz ~ 2483.5 MHz ( CH1~CH13 )
Tx Power Level 20dBm under
Frequency Tolerance within 25 PPM
Chip clock Frequency
Tolerancewithin 25 PPM
Spectrum Mask -30 @ fc-22MHz< f
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2. PERFORMANCE
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Item Specification
Transmit Frequency 2400 MHz ~ 2483.5 MHz ( CH1~CH13 )
Tx Power Level 20dBm
Frequency Tolerance within 25 PPM
Chip clock Frequency
Tolerancewithin 25 PPM
Spectrum Mask
-20 @ 11MHz offset (9Mhz ~ 11MHz)
-28 @ 20MHz offset (11MHz ~ 20Mhz)
-40 @ 30MHz offset (20MHz ~ 30Mhz)
Transmitter constellation error
(rms EVM) -5dB
Spurious Emissions
< -36 dBm @ 30MHz ~ 1GHz
< -30 dBm above @ 1GHz ~ 12.75GHz
< -47 dBm @ 1.8GHz ~ 1.9GHz
< -47 dBm @ 5.15GHz ~ 5.3GHz
Rx Min input Sensitivity
PER 10%
-82dBm@6Mbps, -81dBm@9Mbps, -79dBm@12Mbps
-77dBm@18Mbps, -74dBm@24Mbps, -70dBm@36Mbps
-66dBm@48Mbps, -65dBm@54Mbps
Rx Max input Sensitivity -20dBm(6,9,12,18,24,36,48,54Mbps) @ PER 10%
Rx Adjacent Channel
Rejection
PER 10%,
ACR 16dB@6Mbps, ACR 15dB@9Mbps,
ACR 13dB@12Mbps, ACR 11dB@18Mbps,
ACR 8dB@24Mbps, ACR 4dB@36Mbps
ACR 0dB@48Mbps, ACR -1dB@54Mbps
ACR shall be measured by setting the desired signal's
strength 3 dB above the rate-dependent
sensitivity specified in min input sensitivity
7) WLAN 802.11g transceiver specification
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2. PERFORMANCE
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8) WLAN 802.11n transceiver specification
Item Specification
Transmit Frequency 2400 MHz ~ 2483.5 MHz ( CH1~CH13 )
Tx Power Level 20dBm
Frequency Tolerance within 25 PPM
Chip clock Frequency
Tolerancewithin 25 PPM
Spectrum Mask
-20 @ 11MHz offset (9Mhz ~ 11MHz)
-28 @ 20MHz offset (11MHz ~ 20Mhz)
-45 @ 30MHz offset (20MHz ~ 30Mhz)
Transmitter constellation error
(rms EVM) -5dB
Spurious Emissions
< -36 dBm @ 30MHz ~ 1GHz
< -30 dBm above @ 1GHz ~ 12.75GHz
< -47 dBm @ 1.8GHz ~ 1.9GHz
< -47 dBm @ 5.15GHz ~ 5.3GHz
Rx Min input Sensitivity
PER 10%
[email protected], -79dBm@13Mbps, [email protected]
-74dBm@26Mbps, -70dBm@39Mbps, -66dBm@52Mbps
[email protected], -64dBm@65Mbps
Rx Max input Sensitivity -20dBm(6,9,12,18,24,36,48,54Mbps) @ PER 10%
Rx Adjacent Channel
Rejection
PER 10%,
ACR [email protected], ACR 13dB@13Mbps,
ACR [email protected], ACR 8dB@26Mbps,
ACR 4dB@39Mbps, ACR 0dB@52Mbps
ACR [email protected], ACR -2dB@65Mbps
ACR shall be measured by setting the desired signal's
strength 3 dB above the rate-dependent
sensitivity specified in min input sensitivity
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2. PERFORMANCE
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Item Specification
Receive Frequency 1574.42 MHz ~ 1576.42 MHz
Minimum Sensitivity1 satellite -142dBm, 7 satellites -147dBm at coarse time
aiding
9) GPS receiver specification
10) Signal Bar
Antenna BARSpecification(dBm)
CommentWCDMA(RSSI) GSM
54 -862 -912
1. Call
Connected
& CPIPH
Level=-3.3
43 -932 -962
32 -992 -992
21 -1032 -1032
10 -1092 -1052
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3. TROUBLE SHOOTING
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3. TROUBLE SHOOTING
3.1 RF Component
U1100FL1602
FL1601U1602
FL1600
FL1100
FL1603
FL1101
U1500
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3. TROUBLE SHOOTING
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RF component
Reference Description Reference Description
U1100 FEM + GSM PAM U1101 WFR2600
U1500 WTR2605 U1600 WCDMA B1 PAM
U1602 WCDMA B2/B5 Dual PAM U1603 WCDMA B1 LNA
U1604 WCDMA B2 LNA FL1100 DCS/PCS Dual Saw Filter
FL1101 GSM900 Rx SAW Filter FL1600 WCDMA B1 Duplexer
FL1601 WCDMA B5 Duplexer FL1602 WCDMA B2 Duplexer
FL1603 WCDMA B1 TX SAW SW101 MOBILE S/W
SW101
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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 B2 TX PATH
3. WCDMA B5 TX PATH
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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 B2 RX PATH
3. WCDMA B5 RX PATH
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3. TROUBLE SHOOTING
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GSM850/GSM900/DCS1800/PCS1900 RX/TX Signal PATH
1. GSM850 RX PATH
2. GSM900 RX PATH
3. GSM1900 RX PATH
4. GSM1800 RX PATH
5.GSM COMMON TX PATH
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3. TROUBLE SHOOTING
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3.3 Checking XO Block
The output frequency (19.2MHz) of XO (X4100) is used as the reference one of WTR2605and PM8226 internal VCO.
TP1
TP2
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3. TROUBLE SHOOTING
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Schematic of the Crystal Part (19.2MHz)
Check TP1
(VREG_XO)
19.2 MHz Signal
1.9V VREG_XO1.7V
Check soldering and
components
Check PM8226
No
No
Yes
Yes
Check TP2
(19.2 MHz)
XO OK
C4195
33p
0R4105
100K
R4106 T
OL=0.0
1
U4100
PM8226
117
129
61
169
88
42
31
39
13
44
17
62
6
5
63
120
123
112
77
101
100
119
108
102
85CBL_PWR_N
KPD_PWR_N
OPT_2
OPT_1
PS_HOLD
RESIN_IN
PON_RESET_N
SPMI_CLK
SPMI_DATA
XO_THERM
GND_XOADC
XTAL_19M_IN
XTAL_19M_OUT
GND_XO_BUFF
GND_XO
BB_CLK1_EN
RF_CLK1
RF_CLK2
BB_CLK1
BB_CLK2
SLEEP_CLK1
VREF_BAT_THM
VREF_LPDDR
REF_BYPGND_REF
0R4108
VREF_LPDDR2
VREF_BAT_THERM
DNI
C4102
C4101
DNI
C4100
1n
0.1u
C4106
R4107 0
R4104 10K
DNI
C4196
TP4103
R4112 0
R4110 0
TP4100
VREG_L12_1V8
0R4114
X4100
1RAA19200AAA
19.2MHz
21
34SENSOR XTAL2
X TA L1 G ND 1
WTR0_XO_IN
NFC_CLK_OUT
XO_G_TCXO
BB_CLK
SLEEP_CLK
BB_CLK_EN
MSM_PS_HOLD
JTAG_PS_HOLD
PM_KYPD_PWR_N
PMIC_SPMI_DATA
PMIC_SPMI_CLK
MSM_RESIN_N
Rev1,0) ESD
RevB
QCT Ref.J (11/5)
Please refer to 80-NC833-14 for more information.BB_CLK has special layout and component requirements.
(05/30)QCT Ref.checklist
(07/01)
TP1
TP2
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3. TROUBLE SHOOTING
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LGE Internal Use Only
3.4 Checking FEMID (GSM, W B1/B2/B5) Block
TP2
TP1
TP3 TP4TP5
TP9
TP8TP7
TP6
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3. TROUBLE SHOOTING
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LGE Internal Use Only
Schematic of the Antenna Switch Block
Check TP1~7 (High Level)
1.4V < Voltage < 3.0V Check the TP8,9No
Yes
Check the ANT Logic in each mode
8.2n
L1129
C1110
4.7u
C 11 45 3 .9 p
C1113
10u
DNI
L1105
L1138 2n
100p
C1112
L1106
DNI
22p
C1109
+VPA_BATT0
+VPA_BATT0
DNI
C1118
C1116
DNI
DNI
C1115
C1117
DNI
DNI
C1121
2nL1139
DNI
C1120
C1119
DNI
C1114
0.1u
8.2n
L1128
U1100
EAT62073401
SKY77573-31
43
42
41
40
39
37
38
35
36
34
26
27
28
29
3031
32
33
23
22
9
12
7
20
21
19
15
2
18
8
10
11
14
16
17
13
1
25
6
5
43
24TRX1
GND3
VCC1
VCC2
GND4
GND17
GND1
GND11
GND14
GND13
GND12
GND9
GND8
GND6
RX1
GND2
ANT
SPDT
_IN
SPDT
_OUT
RX2
GND5
GND10
GND7
GND15
GND16
NC1
VBATT
GND20
TRX4
GND19
TRX3
GND18
TRX2
NC2
RF
_IN
SPDT
SW0
SW1
HB
_EN
LB
_EN
MODE0
MODE1
PGND
PA0_R_0
PA0_R_1
WTR_TX1_OUTSPDT_SEL
ANT0_SW_SEL_0ANT0_SW_SEL_1 ANT0_SW_SEL_2
ANT0_SW_SEL_3
TX_MODULE_TRX_2
TX_MODULE_TRX_1
TX_MODULE_TRX_4
for W7 CI (06/07)
RX_G1800
RX_G1900
TP2
TP1
TP3 TP4
TP5
TP9
TP8
TP7
TP6
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3. TROUBLE SHOOTING
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LGE Internal Use Only
TXM LOGIC(SPDT OFF)
BandSPDT_
SEL
ANT0_
SW_SEL0
ANT0_SW_
SEL1
ANT0_
SW_SEL2
ANT0_
SW_SEL3PA0_R0 PA0_R1
LB_HPM G850/900 TX L L H L L L L
LB_MPM G850/900 TX L L H L L L H
LB_LPM G850/900 TX L L H L L H L
LB_ULPM G850/900 TX L L H L L H H
HB_HPM G1800/1900 TX L H L L L L L
HB_MPM G1800/1900 TX L H L L L L H
HB_LPM G1800/1900 TX L H L L L H L
HB_ULPM G1800/1900 TX L H L L L H H
TRX1 W B1/B4 TRX H L L L L -
TRX2 W B2 TRX H L L H L -
TRX3 G900/850 RX H L H L L -
TRX4WB5/B8
TRX,G850/900 RXH L H H L -
RX1 G1900 RX H H H H L -
RX2 G1800 RX H H H H H -
TP1 TP2 TP3 TP4 TP5 TP6 TP7
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3. TROUBLE SHOOTING
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LGE Internal Use Only
Check FEMID Block Refer to 3.4
Check XO Block Refer to 3.3
Check RF TRX Level
START
Re-download & Cal
3.5 Checking WCDMA Block
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3. TROUBLE SHOOTING
- 33 - Copyright 2014 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
SW1100
G1
ANTG2
R1108
10K
R1109
750KTOL=0.01
R1110
3.3
M
C1163
100p100p
C1164
VREG_L6_1V8
100pC1160
L1136
DNI
DNI
L1137
L1148
27n
SW101
43
2
1ANT COMMON
G3 G4
FL1101
881.5MHz
IN1
OUT4
G1
2
G2
3
G3
5
L1108
DNI
100pC1107
L1107
DNI
C1108 100p100pC1106
15n
L1140
L1102
1.2n
L1101
100n
C1101
18p
R1107
4.7K
100pC1165
WTR_PRX_LB_2_IN
RADIATION_PWR_ANT
G850 EAM62732801
EAM62732901G900
SWAP the RX Filter
TP1
TP2
TP3
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3. TROUBLE SHOOTING
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LGE Internal Use Only
Chenck ANT_Logic Refer to 3.4
Check TP1
Over 21 dBm?
Check TP2
Over 21 dBm?
Check TP3
Over 3dBm?
RF Tx Level is OK
Yes
No
Check WTR2605
Check FL1600
Yes
No
Check PAM
Yes
No
10u
C1617
TOL=0.0
1
R1600
51
+VPA0
100pC1676
1.5n
C1618
+VPA_BATT0
DNI
C1607
C1613
10u
SKY77761
EAN62687101
U1600
PGND11
VCC11
VCC210
RFIN2
RFOUT9
VMODE_13
CPL_IN8
VMODE_04
GND7
VEN5
CPL_OUT6
DNI
C1610
C1609
DNI
DNI
C1608
L1616 1n
10n
C1614
DNI
C1666
C1675
DNI
100pC1671100pC1672
PA0_R_0
PA0_R_1
CPL_IN_OUT
LNA_PRX_MB1_INPA0_ON_1
Place matching components near WTR
B1, B4
DRBFMTP2
TP3
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3. TROUBLE SHOOTING
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LGE Internal Use Only
PAM control signal
PA0_ON_1 (C1608): PAM Enable
PA0_R0 (C1609) : PAM Gain Control
PA0_R1 (C1610) : PAM Gain Control
TP2
TP1
TP3
10u
C1617
TOL=0.0
1
R1600
51
+VPA0
100pC1676
1.5n
C1618
+VPA_BATT0
C1613
10u
SKY77761
EAN62687101
U1600
PGND11
VCC11
VCC210
RFIN2
RFOUT9
VMODE_13
CPL_IN8
VMODE_04
GND7
VEN5
CPL_OUT6
DNI
C1610
C1609
DNI
DNI
C1608
10n
C1614
DNI
C1666
PA0_R_0
PA0_R_1
CPL_IN_OUT
PA0_ON_1
DRBFM
TP2
TP1TP3
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3. TROUBLE SHOOTING
- 36 - Copyright 2014 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
PA LOGIC B1/B4
POWER MODE PA0_ON_1 PA0_R0 PA0_R1
SHUT DOWN L L L
STAND-BY L - -
HP MODE H L L
MP MODE H H L
LP MODE H H H
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3. TROUBLE SHOOTING
- 37 - Copyright 2014 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
WCDMA B2
TP1
SW1100
G1
ANTG2
R1108
10K
R1109
750KTOL=0.01
R1110
3.3
M
C1163
100p100p
C1164
VREG_L6_1V8
100pC1160
L1136
DNI
DNI
L1137
L1148
27n
SW101
43
2
1ANT COMMON
G3 G4
FL1101
881.5MHz
IN1
OUT4
G1
2
G2
3
G3
5
L1108
DNI
100pC1107
L1107
DNI
C1108 100p100pC1106
15n
L1140
L1102
1.2n
L1101
100n
C1101
18p
R1107
4.7K
100pC1165
WTR_PRX_LB_2_IN
RADIATION_PWR_ANT
G850 EAM62732801
EAM62732901G900
SWAP the RX Filter
TP1
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3. TROUBLE SHOOTING
- 38 - Copyright 2014 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
EAM62671701FL1602
75
84
92
3
16ANT RX
TX
GND1 GND6
GND2 GND5
GND3 GND4
C1645
1.2p
DNI
L1610
C1653
DNI
C1652 100p
L1617
DNI
1p
C1654
DNI
L1608
27pC1650
L1618
1n
FL1601 EAM62890101
75
84
92
3
16ANT RX
TX
GND1 GND6
GND2 GND5
GND3 GND4
L 16 27 1 5n
L 16 26 4 .7 n
6.8n
L1620
L 16 19 2 .7 n
C1646
1p
L1607
DNI
TX_MODULE_TRX_2
TX_MODULE_TRX_4 WTR_PRX_LB_1_IN
LNA_PRX_MB2_IN
EAM62671701
DPXW-BAND
B8
B5
TRX B5(G850 RX)_B8(G900 RX)
Shunt cap must be
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3. TROUBLE SHOOTING
- 39 - Copyright 2014 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
TP2
TP3
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3. TROUBLE SHOOTING
- 40 - Copyright 2014 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
Check Ant Logic Refer to 3.4
Check TP1
Over 21 dBm?
Check TP2
Over 21 dBm?
Check TP3
Over 3dBm?
RF Tx Level is OK
Yes
No
Check WTR2605
Check FL1601
Yes
No
Check PAM
Yes
No
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3. TROUBLE SHOOTING
- 41 - Copyright 2014 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
PAM control signal
PA0_ON_0 (C1647) : PAM Enable & Band Select
PA0_ON_2 (C1648) : Gain Control
PA0_R_0 (C1648) : Gain Control
TP2
TP1
TP3
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3. TROUBLE SHOOTING
- 42 - Copyright 2014 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
PA LOGIC B2/B5
POWER MODE PA_ON_0 PA_ON_2 PA0_R0
SHUT DOWN L L L
STAND-BY L L -
B1/B2 HPM H L L
B1/B2 LPM H L H
B5/B8 HPM L H L
B5/B8 LPM L H H
C1635
10u
U1602
EAN62885901
SKY77742-21
17
15
13
16
14
10 5
6
4
12
7
3
8
11
1
9
2RFIN
GND3
VBATT
GND4
CPLOUT
VENHB
GND2
VCC
VENLB
GND1
VMODERFOUTLB
RFOUTHB
GND6
GND5
CPLIN
PGND
DNI
C1643
C1649
DNI
+VPA_BATT0
C1642 100p
1n
C1632
C1637
1n
DNI
C1648
C1636
10n
C1641 100p
DNI
C1647
10n
C1633
+VPA0
C1634
10u
PA0_R_0
WTR_PDET_IN
WTR_TX3_OUT
PA0_ON_0
PA0_ON_2
CPL_
IN_
OUT
TP2
TP1
TP3
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3. TROUBLE SHOOTING
- 43 - Copyright 2014 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
WCDMA B5
TP1
SW1100
G1
ANTG2
R1108
10K
R1109
750KTOL=0.01
R1110
3.3
M
C1163
100p100p
C1164
VREG_L6_1V8
100pC1160
L1136
DNI
DNI
L1137
L1148
27n
SW101
43
2
1ANT COMMON
G3 G4
FL1101
881.5MHz
IN1
OUT4
G1
2
G2
3
G3
5
L1108
DNI
100pC1107
L1107
DNI
C1108 100p100pC1106
15n
L1140
L1102
1.2n
L1101
100n
C1101
18p
R1107
4.7K
100pC1165
WTR_PRX_LB_2_IN
RADIATION_PWR_ANT
G850 EAM62732801
EAM62732901G900
SWAP the RX Filter
TP1
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3. TROUBLE SHOOTING
- 44 - Copyright 2014 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
EAM62671701FL1602
75
84
92
3
16ANT RX
TX
GND1 GND6
GND2 GND5
GND3 GND4
C1645
1.2p
DNI
L1610
C1653
DNI
C1652 100p
L1617
DNI
1p
C1654
DNI
L1608
27pC1650
L1618
1n
FL1601 EAM62890101
75
84
92
3
16ANT RX
TX
GND1 GND6
GND2 GND5
GND3 GND4
L 16 27 1 5n
L 16 26 4 .7 n
6.8n
L1620
L 16 19 2 .7 n
C1646
1p
L1607
DNI
TX_MODULE_TRX_2
TX_MODULE_TRX_4 WTR_PRX_LB_1_IN
LNA_PRX_MB2_IN
EAM62671701
DPXW-BAND
B8
B5
TRX B5(G850 RX)_B8(G900 RX)
Shunt cap must be
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3. TROUBLE SHOOTING
- 45 - Copyright 2014 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
TP2
TP3
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3. TROUBLE SHOOTING
- 46 - Copyright 2014 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
Check Ant Logic Refer to 3.4
Check TP1
Over 21 dBm?
Check TP2
Over 21 dBm?
Check TP3
Over 3dBm?
RF Tx Level is OK
Yes
No
Check WTR2605
Check FL1602
Yes
No
Check PAM
Yes
No
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3. TROUBLE SHOOTING
- 47 - Copyright 2014 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
PAM control signal
PA0_ON_0 (C1647): PAM Enable& Band Select
PA0_ON_2(C1648):Gain Control
PA0_R_0 (C1648) : Gain Control
TP2
TP1
TP3
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3. TROUBLE SHOOTING
- 48 - Copyright 2014 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
PA LOGIC B2/B5
POWER MODE PA_ON_0 PA_ON_2 PA0_R0
SHUT DOWN L L L
STAND-BY L L -
B1/B2 HPM H L L
B1/B2 LPM H L H
B5/B8 HPM L H L
B5/B8 LPM L H H
C1635
10u
U1602
EAN62885901
SKY77742-21
17
15
13
16
14
10 5
6
4
12
7
3
8
11
1
9
2RFIN
GND3
VBA
TT
GND4
CPLOUT
VENHB
GND2
VCC
VENLB
GND1
VMODERFOUTLB
RFOUTHB
GND6
GND5
CPL
IN
PGND
DNI
C1643
C1649
DNI
+VPA_BATT0
C1642 100p
1n
C1632
C1637
1n
DNI
C1648
C1636
10n
C1641 100p
DNI
C1647
10n
C1633
C1634
10u
PA0_R_0
WTR_PDET_IN
WTR_TX3_OUT
PA0_ON_0
PA0_ON_2
CPL_
IN_
OUT
TP2
TP1
TP3
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3. TROUBLE SHOOTING
- 49 - Copyright 2014 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
Test Point (WCDMA B1 RF Rx Level)
TP1
SW1100
G1
ANTG2
R110
8
10K
R1109
750KTOL=0.01
R1110
3.3
M
C1163
100p100p
C1164
VREG_L6_1V8
100pC1160
L1136
DNI
DNI
L1137
L1148
27n
SW101
43
2
1ANT COMMON
G3 G4
FL1101
881.5MHz
IN1
OUT4
G1
2
G2
3
G3
5
L1108
DNI
100pC1107
L1107
DNI
C1108 100p100pC1106
15n
L1140
L1102
1.2n
L1101
100n
C1101
18p
R1107
4.7K
100pC1165
WTR_PRX_LB_2_IN
RADIATION_PWR_ANT
G850 EAM62732801
EAM62732901G900
SWAP the RX Filter
TP1
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3. TROUBLE SHOOTING
- 50 - Copyright 2014 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
TP2
2.2nL1621
L1615
2.7n
+VPA0
DNI
L1600
DN
I
C1607
C1613
10u
EAM62711201FL1600
ANT6
RX1
TX3
GND12
GND69
GND24
GND58
GND35
GND47
L1616 1n
10n
C161C1675
DN
I
TX_MODULE_TRX_1 LNA_PRX_MB1_IN
DPX PAMW-BAND
Place matching components near WTR
B1, B4
DRBFM
TP2
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3. TROUBLE SHOOTING
- 51 - Copyright 2014 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
START
Check TP1 Signal exist ?
Check TP2 Signal exist ?
Check RF Switch (M/S)
Yes
No
Check WTR2605
Check FL1600
Yes
No
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3. TROUBLE SHOOTING
- 52 - Copyright 2014 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
WCDMA B2
Test Point (WCDMA B2 RF Rx Level)
TP1
SW1100
G1
ANTG2
R1108
10K
R1109
750KTOL=0.01
R1110
3.3
M
C1163
100p100p
C1164
VREG_L6_1V8
100pC1160
L1136
DNI
DNI
L1137
L1148
27n
SW101
43
2
1ANT COMMON
G3 G4
FL1101
881.5MHz
IN1
OUT4
G1
2
G2
3
G3
5
L1108
DNI
100pC1107
L1107
DNI
C1108 100p100pC1106
15n
L1140
L1102
1.2n
L1101
100n
C1101
18p
R1107
4.7K
100pC1165
WTR_PRX_LB_2_IN
RADIATION_PWR_ANT
G850 EAM62732801
EAM62732901G900
SWAP the RX Filter
TP1
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3. TROUBLE SHOOTING
- 53 - Copyright 2014 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
TP2
EAM62671701FL1602
75
84
92
3
16ANT RX
TX
GND1 GND6
GND2 GND5
GND3 GND4
C1645
1.2p
DNI
L1610
C1653
DNI
C1652 100p
L1617
DNI
1p
C1654
DNI
L1608
27pC1650
L1618
1n
FL1601 EAM62890101
75
84
92
3
16ANT RX
TX
GND1 GND6
GND2 GND5
GND3 GND4
L 16 27 1 5n
L 16 26 4 .7 n
6.8n
L1620
L 161 9 2 .7n
C
1646
1p
L1607
DNI
TX_MODULE_TRX_2
TX_MODULE_TRX_4 WTR_PRX_LB_1_IN
LNA_PRX_MB2_IN
EAM62671701
DPXW-BAND
B8
B5
TRX B5(G850 RX)_B8(G900 RX)
Shunt cap must be
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3. TROUBLE SHOOTING
- 54 - Copyright 2014 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
START
Check TP1 Signal exist ?
Check TP2 Signal exist ?
Check RF Switch (M/S)
Yes
No
Check WTR2605
Check FL1601
Yes
No
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- 55 - Copyright 2014 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
WCDMA B5
Test Point (WCDMA B5 RF Rx Level)
SW1100
G1
ANTG2
R1108
10K
R1109
750KTOL=0.01
R1110
3.3
M
C1163
100p100p
C1164
VREG_L6_1V8
100pC1160
L1136
DNI
DNI
L1137
L1148
27n
SW101
43
2
1ANT COMMON
G3 G4
FL1101
881.5MHz
IN1
OUT4
G1
2
G2
3
G3
5
L1108
DNI
100pC1107
L1107
DNI
C1108 100p100pC1106
15n
L1140
L1102
1.2n
L1101
100n
C1101
18p
R1107
4.7K
100pC1165
WTR_PRX_LB_2_IN
RADIATION_PWR_ANT
G850 EAM62732801
EAM62732901G900
SWAP the RX Filter
TP1
TP1
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LGE Internal Use Only
TP2
EAM62671701FL1602
75
84
92
3
16ANT RX
TX
GND1 GND6
GND2 GND5
GND3 GND4
C1645
1.2p
DNI
L1610
C1653
DNI
C1652 100p
L1617
DNI
1p
C1654
DNI
L1608
27pC1650
L1618
1n
FL1601 EAM62890101
75
84
92
3
16ANT RX
TX
GND1 GND6
GND2 GND5
GND3 GND4
L 16 27 1 5n
L 16 26 4 .7 n
6.8n
L1620
L 16 19 2 .7 n
C1646
1p
L1607
DNI
TX_MODULE_TRX_2
TX_MODULE_TRX_4 WTR_PRX_LB_1_IN
LNA_PRX_MB2_IN
EAM62671701
DPXW-BAND
B8
B5
TRX B5(G850 RX)_B8(G900 RX)
Shunt cap must be
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3. TROUBLE SHOOTING
- 57 - Copyright 2014 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
START
Check TP1 Signal exist ?
Check TP2 Signal exist ?
Check RF Switch (M/S)
Yes
No
Check WTR2605
Check FL1602
Yes
No
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3. TROUBLE SHOOTING
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LGE Internal Use Only
3.6 Checking GSM Block
Check FEMID Block Refer to 3.4
Check XO Block Refer to 3.3
Check RF TRX Level
START
Re-download & Cal
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3. TROUBLE SHOOTING
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LGE Internal Use Only
3.6.1 Checking TCXO Block
Refer to 3.3
3.6.2 Checking Tx module Block
Refer to 3.4
3.6.3 Checking RF TX level
Schematic of GSM(850/900)/DCS/PCS Tx Block
8.2n
L1129
C1110
4.7u
C 11 45 3 .9 p
C1113
10u
DNI
L1105
L1138 2n
100p
C1112
L1106
DNI
22p
C1109
+VPA_BATT0
+VPA_BATT0
DNI
C1118
C1116
DNI
DNI
C1115
C1117
DNI
DNI
C1121
2nL1139
DNI
C1120
C1119
DNI
C1114
0.1u
8.2n
L1128
U1100
EAT62073401
SKY77573-31
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
24TRX1
GND3
VCC1
VCC2
GND4
GND17
GND1
GND11
GND14
GND13
GND12
GND9
GND8
GND6
RX1
GND2
ANT
SPDT
_IN
SPDT
_OUT
RX2
GND5
GND10
GND7
GND15
GND16
NC1
VBATT
GND20
TRX4
GND19
TRX3
GND18
TRX2
NC2
RF
_IN
SPDT
SW0
SW1
HB
_EN
LB
_EN
MODE0
MODE1
PGND
PA0_R_0
PA0_R_1
WTR_TX1_OUT
SPDT_SEL
ANT0_SW_SEL_0
ANT0_SW_SEL_1 ANT0_SW_SEL_2ANT0_SW_SEL_3
TX_MODULE_TRX_2
TX_MODULE_TRX_1
TX_MODULE_TRX_4
for W7 CI (06/07)
RX_G1800
RX_G1900
TP2
SW1100
G1
ANTG2
R1108
10K
R1109
750KTOL=0.01
R1110
3.3
M
C1163
100p100p
C1164
VREG_L6_1V8
100pC1160
L1136
DNI
DNI
L1137
L1148
27n
SW101
43
2
1ANT COMMON
G3 G4
FL1101
881.5MHz
IN1
OUT4
G1
2
G2
3
G3
5
L1108
DNI
100pC1107
L1107
DNI
C1108 100p100pC1106
15n
L1140
L1102
1.2n
L1101
100n
C1101
18p
R1107
4.7K
100pC1165
WTR_PRX_LB_2_IN
RADIATION_PWR_ANT
G850 EAM62732801
EAM62732901G900
SWAP the RX Filter
TP1
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LGE Internal Use Only
TP2
TP1
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3. TROUBLE SHOOTING
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LGE Internal Use Only
Check TP1
If GSM over 31 dBm ?
If DCS/PCS over 28 dBm ?
Check TP2, 3
If GSM(TP2) under 6 dBm ?
If DCS/PCS(TP3) under 6 dBm ?
GSM/DCS/PCSTx is OK
Check the other part
Check Tx Module
Check XO Block Refer to 3.3
Yes
Yes
Check WTR2605
Start
No
No
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LGE Internal Use Only
3.6.4 Checking RF Rx Block
TP4
TP2
TP3
TP1
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LGE Internal Use Only
SW1100
G1
ANTG2
R1108
10K
R1109
750KTOL=0.01
R1110
3.3
M
C1163
100p100p
C1164
VREG_L6_1V8
100pC1160
L1136
DNI
DNI
L1137
L1148
27n
SW101
43
2
1ANT COMMON
G3 G4
FL1101
881.5MHz
IN1
OUT4
G1
2
G2
3
G3
5
L1108
DNI
100pC1107
L1107
DNI
C1108 100p100pC1106
15n
L1140
L1102
1.2n
L1101
100n
C1101
18p
R1107
4.7K
100pC1165
WTR_PRX_LB_2_IN
RADIATION_PWR_ANT
G850 EAM62732801
EAM62732901G900
SWAP the RX Filter
TP1
TP2
C1152
DNID
NI
L1105
L1138 2n
L1106
DNI
C1150 100pC1149 100p2nL1139
FL1100
4
3
2
1
5
10
6
7
8
9GSM1900_OUT
GND6
GND5
GSM1800_OUT
GND7
GND4
GSM1800/1900_IN
GND1
GND2
GND3
WTR_PRX_MB_3_IN
Place matching components near WTR
RX_G1800
RX_G1900
G1800, G1900
TP3
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3. TROUBLE SHOOTING
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LGE Internal Use Only
Schematic of GSM(850/900)/DCS/PCS Rx Block
Set the Phone Rx is ON
Check TP1 Signal exist ?
Check TP2,3,4 Signal exist ?
Check RF Switch (M/S)
Yes
No
Check WTR2605
Check Tx Module
Yes
No
EAM62671701FL1602
75
84
92
3
16ANT RX
TX
GND1 GND6
GND2 GND5
GND3 GND4
DNI
L1610
C1653
DNI
C1652 100p
1p
C1654
DNI
L1608
27pC1650L 16 27 1 5n
L 16 26 4 .7 n
6.8n
L1620
TX_MODULE_TRX_4 WTR_PRX_LB_1_IN
EAM62671701
DPXW-BAND
B8
B5
TRX B5(G850 RX)_B8(G900 RX)
Shunt cap must be
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3. TROUBLE SHOOTING
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LGE Internal Use Only
3.7 GPS/WIFI/BT
3.7.1 GPS Module
The WTR2605 is integrated GPS solution.
Reference Description
CN1103 ANTENNA CONTACT
FL1105 Saw Filter
U1 GPS LNA
U1500 WTR2605
14
10
1120
12
24
13
C1144
C5217
CN9
C8101
FL7103
T 2
C4198
C4178
L1126U1
C5213
FB1140
R520R5200
C1154
C1161
LD983L1125
R4116
VA7103
C7103
R2201
FL1105
VA7101
C4180
L1124
C5207
FL7101
C7105
R4142
C4147
L1131
TP8101
C4179
L1118
C8100
C4181
C1153
C8401
U8100
ZD8401
C4145
TP8100
Q4100
BAT4130
R7305
CN7400
L1134
R9301
Q4101
T 41
CN7100
R8401
C6811
R5205
ZD9830
C4131C4132
C7100
R7401
R7101
FL1107
C5201
U4131
C4159
L1120
FL
7400
C1143
C7101
C4182
L1127
R9601
FL1108
R7303
R2207
C9311
ZD8400
VA7403
CN1102
C5212
C7402
C7400
R4105
L1135
R2202
C4165
C7102
C4156
X5200C4166
VA7404
T 2
CN1103
L1133
L1147
C4194
L1121
R5203
C4124
D6810
L1144
L1132
L1146
C1159
R2208
VA7102
FL7102
R7
R9300
R4115
C1142
C4197
C4189
C7403
VA7100
R1105
C4123
C8400
C4183
U4132
L1130
C1141
U4133
C7401
R7306
R8400
C7104
ANTENNA CONTACT
Saw Filter
GPS LNA
U1500
WTR2605
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3. TROUBLE SHOOTING
- 66 - Copyright 2014 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
3.7.2 WIFI,BT Module
WCN3620 is the combination module that integrates WLAN(WIFI) and BT (built-in clock and BPS filter,diplexer etc. )
Reference Description
CN5100C-Clip
Connected to antenna
FL5100 Saw Filter
U5100 WCN3620
CN5100
Connected to antenna
U5100
WCN3620
FL5100
Saw Filter
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3. TROUBLE SHOOTING
- 67 - Copyright 2014 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
3.8 GPS/WIFI/BT SIGNAL PATH
3.8.1 GPS Signal Path
7
814
20
21
40
10
1120
12
24
13
F
E
D
C
B
A1
7
12
1324
C5200
C2340
C4195
VA9503
C5230
C1144
C5217
C2388
U6420
ANT5202
C2302
R6424
CN9300
R9501
C8101
FL7103
R1401
TP 5203
C2306
C4198
C6611
C2377
C4178
C6623
R9503
R9600
C2375
R4108
L
L1126
C7302
U1
FL7302
C5213
C4187
FB1140
C1121
C2386
R5202
C9600
R6617
C2366
R5200
C5220
C7304
C9504
C9107
C1119
C1154
C1161
LD9830L1125
C9100
R4116
ZD6612
VA7103
C7103
R2201
FL1105
C2
381
C2356
C5122
VA7101
R4904
C4180
L1124
D5102
C2309
C5207
FL7101
ZD6611
C4196
C7105
VA9502
R4142
C2301
C2365C
9506
R6613
C4147
C2367
R5206
C1165
C4148
R7300
R4210 C2339
C9105
ZD6610
D5100
C5211
L1131
J95
00
ZD
VA9501
TP 8101
C4179
L
L1118
C8100
R9104C2370
R4911
R4112
C2392
R4132
C4104
C9501
R4107
VA7303
VA9100
C2343
C1101
C4157
C4141
C2374
C6622
R4104
R2104
C2372
C4181
C2380
R8950
R9502
C1153
C5219
R1400
C8401
C7301
C2345
U8100
CN7200
C5222
ZD8401
C1120
C9505
TP5202
C9300
C4145
TP 8100
Q4100
C2342
BAT4130
R7305
S9500
C2308
L6810
R5230
D6811
CN7400
L1134
C5232
R9301
D9100
C5206
C1117
Q4101
TP 4100
C2387
R2102
C5218
VA9513
J6
610
C5231
CN7100
R8401
C6811
C9106C5216
R9504
U4134
R5205
C5202
ZD9830
FB6100
U5200
C4131C4132
C4900
C7100
C2382
R7401
D9504
R7101
L5201
FL1107
L4900
C2378
C9502
C4188
ZD6613
CN
C5201
C2371
C2305
C4193
C4136
U4131
R4114
R9602
C9301
C4159
C2341
C5120
C4184
R9603
R9604
C5123
R9111
L1120
C2389
FL74
00
C1143
D9500
C7101
R9605
C4182
L1127
C2344
C4192
C5214
R9601
C2373
C8950
FL1108
R4209
R7303
R2207
C6420
C2358
CN9100
VA9506
D9505
C2354
C9311
ZD8400
VA7403
FL9100
CN1102
C5212
C7402
Q5200
R1107
C7400
L6811
C4140
R9606
D7302
C2368
R4105
C5210
L1135
L1148
R4903
D9503
R2202
C4165
R9109
C52
C2338
C2304
C7102
C4185
L
C4156
C4153
X5200C4166
R7301
D7301
FL7301
VA7404
C1118
C9500
TP 5200
L1101
CN1103
C2337
C1115
L1133
L1147
C9108
C4103
L1102
C2303
C2346
C4194
L1121
R5203
FB6610
C4124
D9502
U4900
C
C6812
D6810
L1144
L1132
R7203
VA9500
L1146
C2100
C5223
R3308
C2353
C1159
R2208
R7201
R2319
L5200
C5204
VA7102
FL7102
C9503
R9500
FB6611
CN7300
R7304
R9300
R4115
ANT2500
R9505
C1142
C7300
C4197
C4189
C4122
R5204
VA9504
C7403
C7303
C4162
C2376
C7305
TP5201
VA7100
J9601
R3301
R1105
C4123
C8400
R6612
R4133
FL7300
VA9505
C4105
R9107
R9106
R9108
L
C4183
C2369
C2394
L
U4132
D5101
C5205
C2391
C2352
C5215
TP5204
L1130
C4138
R4902
C1141
R4110
C2379
R3302
C5100
C2307
C6810
C2300
R3304
U4133
L2300
C 2
3 5 5
C7401
R7306
C4901
C2390
C5209
R8400
J9600
R6425
C7104
FB6612
ZD9100
D9501
GPS Signal
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3. TROUBLE SHOOTING
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LGE Internal Use Only
3.8.2 WIFI,BT Signal Path
WIFI,BTSignal
To opposite side
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3. TROUBLE SHOOTING
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LGE Internal Use Only
3.9 Checking GPS/WIFI/BT
3.9.1 Checking GPS
START
Check ANT1103
Check TP1
R11002 is 1.8vL11014 is 2.7v
Check TP2
Signal exist?
Remove the foreign substance
inANT1103
ANT 1103 : Ant. Contact
U1 : GPS LNA
FL1105 :SAW Filter
U1500 :WTR2605
U4100 : PM8226
X4100 : Crystal
Yes
No
Check WTR2605
Check U4100
Check X4100
Yes
Yes
No
No
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3. TROUBLE SHOOTING
- 70 - Copyright 2014 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
Schematic of GPS LNA Block
TP1
DNI
L1126
VREG_L14_2V75
DNI
L1125
22n
L1135
22n
L1118
C1142
0.1
u
6.3VC1141
100
p
100
p
C1143
L1127
10
n
SFMG2BAD001
U1
4
5
3 6
2
7 1
8
GND4
VDD
VCTRL
RFIN
GND3
GND1
RFOUT
GND2
L1146 8.2n
DNI
L1130
FB1140 ?
C1161 100p
L1147 2.2n
GNSS_ELNA_EN
WTR_GNSS_RF_IN_1
TP1
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3. TROUBLE SHOOTING
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LGE Internal Use Only
TP2
U4100
X4100
100pC1508
C1513
DNI
51 TOL=0.01
R1504
WTR_XO_IN
WTR0_XO_IN
TP2
Schematic of WTR2605
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3. TROUBLE SHOOTING
- 72 - Copyright 2014 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
Test point Net name Description
TP1 VREG_L6_1V8 Power for WCN Digital I/O circuits
TP2 VREG_L10_1V8 Power for XO circuitinput voltage.
TP3 VREG_L24_1V3Power for WCN analog, digital,and RF core circuits.
Power for WLAN driver amplifier circuits
TP4 VREG_L16_3V3 Power for WLAN 2.4GHz PA circuits
3.9.2 Checking WIFI,BT
START
Check ANT5100
Check TP1,2,3,4
TP1 C5100 is 1.8v
TP2 C5101 is 1.8v
TP3 C5224 is 1.3v
TP4 R5105 is 3.3v
Remove the foreign substance
inANT1103
ANT5100 : Ant. Contact
U5100 : WCN3620
U4100 : PM8226
Yes
No
Check U5100
Check U4100
Yes
No
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3. TROUBLE SHOOTING
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LGE Internal Use Only
TP1
TP3
CN5100
TP4
TP2
U5100
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3. TROUBLE SHOOTING
- 74 - Copyright 2014 LG Electronics. Inc. All right reserved.Only for training and service purposes
LGE Internal Use Only
Schematic of WCN3620
C5115
10u
U5100
WCN-3620-0-61WLNSP
4
36
3
11
9
43
58
37
60
23
7
16
13
51
52
57
56
29
24
22VDD_IO_1P8
VDD_XO_1P8
VDD_DIG_1P2
VDD_FM_RXFE_1P3
VDD_FM_RXBB_1P3
VDD_FM_PLL_1P3
VDD_FM_VCO_1P3
VDD_BT_BB_1P3
VDD_BT_PLL_1P3
VDD_BT_VCO_1P3
VDD_BT_FM_DIG_1P3
VDD_WL_BB_1P3
VDD_WL_2GPA_1P3
VDD_WL_PLL_1P3
VDD_WL_UPC_1P3
VDD_WL_2GLNA_1P3
VDD_WL_2GPA_3P3
VDD_BT_RF_1P3
VDD_WL_LO_1P3
VDD_BT_DA_3P310u
C5112
FB5100240
100p
C5113
470n
6.3VC5101
6.3V
470n
C5100
C5114
100p
4.7u
C5102
0R5105
10n
C5
107
10V
6.3V C5105
22n
10V 10n
C5108
10n
10V
C5109
C5111
10V 10n
VREG_L24_1V3
VREG_L16_3V3
VREG_L10_1V8
VREG_L6_1V8
R5104
0
C5116
100p
C5224
DNI
TP4
TP3
TP2TP1
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LGE Internal Use Only
3.10 Audio Trouble
3.10.1 Speaker troubleshooting
Speaker control signals are generated byMSM8226(U2100) and Power is supplied by WCD9302(U6100).
END
END
END
END
Check the Speaker.
And Reconnect Rear cover
Change the Speaker.
Is Speaker sound ok?
Change the Low FPCB .
Is Speaker sound ok?
Change the WCD9302(U1600).
Is Speaker sound ok?
Is Speaker sound ok?
No
No
No
No
Yes
Yes
Yes
Yes
START
Change the Main PCB
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LGE Internal Use Only
3.10.2 Receiver troubleshooting
Receiver control signals are generated by MSM8226(U2100) and Power is supplied byWCD9302(U6100).
END
END
END
Check the Receiver sound.(Loop back test)
Change the Receiver.Is receiversound ok?
Change the WCD9302(U1600).
Is receiversound ok?
Is receiver sound ok?
No
No
No
Yes
Yes
Yes
START
Change the Main PCB
Receiver
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LGE Internal Use Only
3.10.3 Main MIC troubleshooting
Main MIC signal is generate by MEMS MIC on Lower FPCB.
END
END
END
Check the MIC signal by Loopback testor camcorder recprding.
Change the Low FPCB.Is vioce signal OK?
Change the WCD9302(U1600).
is vioce signal OK?
Change the MIC hole and clean up.
is vioce signal OK?
No
No
No
Yes
Yes
Yes
START
Change the Main PCB
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LGE Internal Use Only
100
MIC100
Main MIC
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LGE Internal Use Only
3.10.4 SUB MIC troubleshooting
Sub MICsignal is generate by MEMS MIC on Main PCB
END
END
END
Check the MIC signal byLoopback test
Change the MIC.Is vioce signal OK?
Change the WCD9302(U1600).
is vioce signal OK?
Change the MIC hole and clean up.
is vioce signal OK?
No
No
No
Yes
Yes
Yes
START
Change the Main PCB
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LGE Internal Use Only
MIC6920
Sub MIC
U6100
WCD9302
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LGE Internal Use Only
3.10.5 Ear-MIC troubleshooting
Ear MIC control signal is generate by WCD9302(U6100).
- Disable to recognize headset insert
END
Change the FSA5157(U6420)
END
END
Check the MIC signal by Loopback Test.And reconnect Main PCB.
Check the Detect pin.
Does detect pin drop to 0V?
Does the headset detection?
Change the WCD9302(U1600).
is vioce signal OK?
Change the EarJack
Socket. Does detection of headset?
No
No
No
No
Yes
Yes
Yes
Yes
START
Change the Main PCB
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LGE Internal Use Only
Detect
Pin Test Point
Ear-jack
socket
U6420
FSA5157
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LGE Internal Use Only
- Disable to using headset MIC or headset receiver when voice call
END
END
Check the MIC signal by Loopback Test.
And reconnect main PCB
Change the WCD9302(U1600).
is vioce signal OK?
Change the Ear-jack Socket.
No
No
Yes
Yes
START
Change the Main PCB
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LGE Internal Use Only
3.11 Main Camera Trouble Shooting
Main Camera control signals are generated by MSM8226.
Camera is OK?
Check the camera connector and
Reconnect.
Yes
Yes
Yes
Yes
Yes
END
END
Start
Check the MSM8226/
PM8226 outputs RESET(TP1)
MCLK(TP2) DVDD(TP3)
Check the LDO outputs
IOVDD(TP4),AVDD(TP5)
Check the EMI Filter signals
CLK(TP6),DATA(TP7,8)
No
No
No
No
No
Camera is OK?
Change the camera
Change the Main board
Change the LDO IC
Change the EMI Filter
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LGE Internal Use Only
TP2TP1
TP5TP4TP3
TP6
TP7
TP8
CN7300
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LGE Internal Use Only
R7300 0
C7305
DNI
1u
C7300
CAM_VCM_2V8
CAM_AVDD_2V8
MAIN_CAM_DVDD
1u
C7301
1u
C7302
1u
C7303
CN7300
1312
1411
1510
169
178
187
196
205
214
223
232
241
C7304
DNI
CAM_IOVDD_1V8
D7301
D7302
CAM0_I2C_SCL
CAM0_I2C_SDA
MAIN_CAM0_MCLK
RevB) for GPS tuning
0603,5.5V,35V,15pF
(06/03)for W & X commonize
TP3
TP5 TP2
FL7302
5
6
31
42P2 P4
P1 P3
P6
P5
VA7303
R7301 4.7K
CN7300
1312
1411
1510
169
178
187
196
205
214
223
232
241
CAM_IOVDD_1V8
CAM_VCM_2V8
FL7300
5
6
31
42P2 P4
P1 P3
P6
P5
FL7301
5
6
31
42P2 P4
P1 P3
P6
P
5
MAIN_CAM0_MIPI_CLK_P
MAIN_CAM0_MIPI_CLK_N
MAIN_CAM0_MIPI_DATA1_N
MAIN_CAM0_MIPI_DATA0_N
MAIN_CAM0_MIPI_DATA0_P
MAIN_CAM0_MIPI_DATA1_P
MAIN_CAM0_RESET_N
0620
(DNI for 5M)
(VCM_PWDN)
1005,5.6V,15.5V,100pF
(MAIN_CAM0_WP_N)
TP4
TP1
TP6
TP7
TP8
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LGE Internal Use Only
3.12 Main LCD Trouble Shooting
Main LCD control signals are generated by MSM8226.
Those signals path are :MSM8226 -> LCD Module
LCD display OK?
Is the Main PCB powered?
Press POWER key to turn the power on
Check the LCD connector nd reconnect
Yes
Yes
Yes
Yes
Yes
Yes
END
END
END
Start
Check the MSM8226/
PM8226 outputs RESET(TP1)
IOVDD(TP2) AVDD(TP3)
Check the DSV IC outputs
DDVDH(TP4),DDVDL(TP5)
Check the EMI Filter signals
CLK(TP6),DATA(TP7,8)
No
No
No
No
No
No
LCD display OK?
Change the LCD
Change the Main board
Change the DSV IC
Change the EMI Filter
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TP2
TP1
TP5TP4
TP3
TP6
TP7
TP8
CN7100
R7101 0
V
A7102
V
A7103
FL7102
5
6
31
42P2 P4
P1 P3
P6
P5
C7102
1u
6.3
V
C71
01
6.3
V
0.1u
C7104
DNI
C7105
DNI
VREG_L8_1V8
VREG_L15_2V8
FL7101
5
6
31
42P2 P4
P1 P3
P6
P5
FL7103
5
6
31
42P2 P4
P1 P3
P6
P5
DDVDH_+5.5V
DDVDL_-5.5V
EAG63232601
CN7100
13 12
14 11
15 10
16 9
17 8
18 7
19 6
20 5
21 4
22 3
23 2
24 1
G1G2
G3G4
6.3
V
1u
C71
00
V
A7100
V
A7101
0.1u
6.3
V
C7103
LCD_MIPI_CLK_P
LCD_MIPI_DATA0_P
LCD_MIPI_DATA0_N
LCD_MIPI_DATA1_N
LCD_MIPI_DATA1_P
LCD_MIPI_CLK_N
PMIC_LED_C
PMIC_LED_A
LCD_MAKER_ID
LCD_VSYNC
LCD_RESET_NCABC_WLED
RevB) for GPS tuning
1005,5.6V,15.5V,100pF
TP2
TP1
TP3
TP5
TP4TP6
TP7
TP8
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3.13 Touch troubleshooting
Touch control signals are generated by MSM8226. Those signals path are :
MSM8226 ->Touch Module
No
No
No
Reconnect the touch connector
&Bto B connector (CN7200)
Check VREG_L28_2V95(TP1)
&Touch_RESET(TP2)
&I2C_SDA(TP3)_SCL(TP4) output
Change the main board
Change the Touch module
END
END
END
Output work well?
Function is OK?
Touch is OK?
Yes
Yes
Yes
START
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LGE Internal Use Only
VREG_L6_1V8 R2205 3.3K
3.3KR2206 TOUCH_I2C_SCL
TOUCH_I2C_SDA
TP4
TP3
VREG_L28_2V95
VREG_L6_1V8
10K
R7202
10K
R7200
VREG_L6_1V8
1u
C7202
1u
C7201
U7200
EAN62953601
ATMXT336S-MAUR
28
27
26
25
24
23
2221
20
19
18
17
16
14
13
10
7
6
4
3
1
43
44
45
46
47
48
49
50
51
52
53
54
55
56X22
X21
X20
X19
X18
X17
X16
X15
X14
X13
X12
EXTCAP
XVDD
AVDD2
X23
VDD1
RESET
SDA
SCL
VDD2
ADDSEL
CHG
X0
X1
X2
X3
X4
X5
X6
X7
X8
X9
X10
X11
AVDD1
22nC7200
1u
C7203
TOUCH_I2C_SCL
TOUCH_I2C_SDA
TX18
TX17
TX16
TX2
TX13
TX14
TX15
TX8
TX6
TX4
TX12
TX10
TX21
TX1
TX0
TX19
TX20
TX3
TX5
TX7
TX9
TX11
TOUCH_ATTN
TOUCH_RESET_N
C7201 /C7203should be
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LGE Internal Use Only
TP4
TP3
TP2
TP1
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LGE Internal Use Only
3.14 Compass sensor troubleshooting
END
END
Change the Compass Sensor
IC(U8100)
Change the main board
Compass Sensor Function is OK?
Compass Sensor function is OK?
Yes
Yes
No
START
BMC150EAN62637201
U81002
5
14
1
13
10
11
6
3 9
8
12
4
7
GND2DRDY
CSB
VDD
GND3INT2
GND1
SCK
VDDIO
PS
SDOSDI
INT3
INT1
6.3V
0.1u
C8101C8100
0.1u
6.3V
TP8100TP8101
VREG_L19_2V85VREG_LVS1_1V8
SENSOR0_I2C_SCL
SENSOR0_I2C_SDA
BMC150_INT_1
COMPASS_INT
geomagnetic : b'0001_011x
accelerometer : b'0001_001x
Compass Sensor IC(U8100)
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LGE Internal Use Only
Compass Sensor IC(U8100)
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LGE Internal Use Only
3.15 Proximity Sensor troubleshooting
Proximity Sensor is worked as below:
Send Key click -> Phone number click -> Call connected -> Object moved at the sensor-> Control the screens on/off
operation automatically
END
END
Send Key click & Phone number click
& Call connected
Object moved at the Proximity sensor
Change the main board
LCD off?
Function is OK?
No
Yes
Yes
START
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LGE Internal Use Only
U8400 APDS-9130-200
9
3
54
6
72
81SDA VDD
INT SCL
GND
LEDK LEDA
LDR
NC1u
6.3V
C8400
22
R8401
ZD8400
DNI
ZD8401
DNI
VREG_L19_2V85VREG_LVS1_1V8
0.0
5
4.7
K
R8400
1u6.3V
C8401
SENSOR0_I2C_SCL
SENSOR0_I2C_SDA
PROXIMITY_INT
RevB) DGMS RevB) DGMS
APDS-9130 : b'0111001x
Proximity sensor
Proximity sensor
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LGE Internal Use Only
3.16 Power ON Troubleshooting
The main power source of LGD410H is provided by 1 chip which isPM8226. Since MSM8226 only powers up
normally when MSM8226 is properly powered therefore, PM8226is the actual one to take look at.
Power ON sequence of LGD410H is,PWR key press -> BAT_FET_N goes low-> GPIO8 High -> VREG_S3 High -> VREG_L6
High -> VREG_L12 High -> XBB_CLK -> PON_RESET_N goes high -> PS_HOLD High.
C41
95
33p
0R4105
100K
R4106 T
OL=0.0
1
U4100
PM8226
117
129
61
169
88
42
31
39
13
44
17
62
6
5
63
120
123
112
77
101
100
119
108
102
85CBL_PWR_N
KPD_PWR_N
OPT_2
OPT_1
PS_HOLD
RESIN_IN
PON_RESET_N
SPMI_CLK
SPMI_DATA
XO_THERM
GND_XOADC
XTAL_19M_IN
XTAL_19M_OUT
GND_XO_BUFF
GND_XO
BB_CLK1_EN
RF_CLK1
RF_CLK2
BB_CLK1
BB_CLK2
SLEEP_CLK1
VREF_BAT_THM
VREF_LPDDR
REF_BYP
GND_REF
0R4108
VREF_LPDDR2
VREF_BAT_THERM
DNI
C410
2
C410
1
DNI
C4100
1n
0.1u
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