LG-D410H

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Internal Use Only

Service Manual

LG-D410H

Date: April, 2014 /Issue 1.0

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- 2 - Copyright 2014 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 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



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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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



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



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




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.


amount.

Fixed Dial Number Yes

Service Dial Number No

2.5 SW Features

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2. PERFORMANCE



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.


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.


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



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


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2. PERFORMANCE



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



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



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



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



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



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



Item Specification


Tx Power Level 20dBm




Spectrum Mask

-20 @ 11MHz offset (9Mhz ~ 11MHz)

-28 @ 20MHz offset (11MHz ~ 20Mhz)


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


-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



8) WLAN 802.11n transceiver specification

Item Specification


Tx Power Level 20dBm




Spectrum Mask

-20 @ 11MHz offset (9Mhz ~ 11MHz)



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]


[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



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



3. TROUBLE SHOOTING

3.1 RF Component

U1100FL1602

FL1601U1602

FL1600

FL1100

FL1603

FL1101

U1500

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3. TROUBLE SHOOTING



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



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



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



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



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



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



3.4 Checking FEMID (GSM, W B1/B2/B5) Block

TP2

TP1

TP3 TP4TP5

TP9

TP8TP7

TP6

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3. TROUBLE SHOOTING



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



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



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



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



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



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



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



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



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



TP2

TP3

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3. TROUBLE SHOOTING



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



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



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



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

7/25/2019 LG-D410H

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3. TROUBLE SHOOTING



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


LNA_PRX_MB2_IN

EAM62671701

DPXW-BAND

B8

B5


Shunt cap must be

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3. TROUBLE SHOOTING



TP2

TP3

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3. TROUBLE SHOOTING



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

7/25/2019 LG-D410H

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3. TROUBLE SHOOTING



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



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



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

7/25/2019 LG-D410H

50/226

3. TROUBLE SHOOTING



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


B1, B4

DRBFM

TP2

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3. TROUBLE SHOOTING



START

Check TP1 Signal exist ?


Check RF Switch (M/S)

Yes

No

Check WTR2605

Check FL1600

Yes

No

7/25/2019 LG-D410H

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3. TROUBLE SHOOTING



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

7/25/2019 LG-D410H

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3. TROUBLE SHOOTING



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


LNA_PRX_MB2_IN

EAM62671701

DPXW-BAND

B8

B5


Shunt cap must be

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3. TROUBLE SHOOTING



START




Yes

No

Check WTR2605

Check FL1601

Yes

No

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3. TROUBLE SHOOTING



WCDMA B5


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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3. TROUBLE SHOOTING



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


LNA_PRX_MB2_IN

EAM62671701

DPXW-BAND

B8

B5


Shunt cap must be

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3. TROUBLE SHOOTING



START




Yes

No

Check WTR2605

Check FL1602

Yes

No

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3. TROUBLE SHOOTING



3.6 Checking GSM Block

Check FEMID Block Refer to 3.4


Check RF TRX Level

START

Re-download & Cal

7/25/2019 LG-D410H

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3. TROUBLE SHOOTING



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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TP2

TP1

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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


Yes

Yes

Check WTR2605

Start

No

No

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3.6.4 Checking RF Rx Block

TP4

TP2

TP3

TP1

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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


RX_G1800

RX_G1900

G1800, G1900

TP3

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Schematic of GSM(850/900)/DCS/PCS Rx Block

Set the Phone Rx is ON


Check TP2,3,4 Signal exist ?


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


EAM62671701

DPXW-BAND

B8

B5


Shunt cap must be

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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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3.7.2 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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3.8 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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3.8.2 WIFI,BT Signal Path

WIFI,BTSignal

To opposite side

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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



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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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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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



TP1

TP3

CN5100

TP4

TP2

U5100

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3. TROUBLE SHOOTING



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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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 .


Change the WCD9302(U1600).



No

No

No

No

Yes

Yes

Yes

Yes

START

Change the Main PCB

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3. TROUBLE SHOOTING



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?


Is receiversound ok?

Is receiver sound ok?

No

No

No

Yes

Yes

Yes

START

Change the Main PCB

Receiver

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3. TROUBLE SHOOTING



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?


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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3. TROUBLE SHOOTING



100

MIC100

Main MIC

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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?


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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3. TROUBLE SHOOTING



MIC6920

Sub MIC

U6100

WCD9302

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3. TROUBLE SHOOTING



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?


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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3. TROUBLE SHOOTING



Detect

Pin Test Point

Ear-jack

socket

U6420

FSA5157

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3. TROUBLE SHOOTING



- Disable to using headset MIC or headset receiver when voice call

END

END

Check the MIC signal by Loopback Test.

And reconnect main PCB


is vioce signal OK?

Change the Ear-jack Socket.

No

No

Yes

Yes

START

Change the Main PCB

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3. TROUBLE SHOOTING



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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3. TROUBLE SHOOTING



TP2TP1

TP5TP4TP3

TP6

TP7

TP8

CN7300

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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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3. TROUBLE SHOOTING



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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3. TROUBLE SHOOTING



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. TROUBLE SHOOTING



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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3. TROUBLE SHOOTING



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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3. TROUBLE SHOOTING



TP4

TP3

TP2

TP1

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3. TROUBLE SHOOTING



3.14 Compass sensor troubleshooting

END

END

Change the Compass Sensor

IC(U8100)


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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3. TROUBLE SHOOTING



Compass Sensor IC(U8100)

7/25/2019 LG-D410H

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3. TROUBLE SHOOTING



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


LCD off?

Function is OK?

No

Yes

Yes

START

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3. TROUBLE SHOOTING



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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3. TROUBLE SHOOTING



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

Date post:	27-Feb-2018
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LG-D410H

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