LG LMX430EMW Owner's Manual

MOBILE PHONE

SERVICE MANUAL

CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL

MODEL : LM-X430EMW

Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic means), publication, modification, copying or transmission of this Service Manual is STRICTLY PROHIBITED unless you have obtained the prior written consent of the LG Electronics entity from which you received this Service Manual. The material covered by this prohibition includes, without limitation, any text, graphics or logos in this Service Manual

Only training and service purposes

Date: September 2019 / Issue 1.0

Table Of Contents

1. INTRODUCTION.................................................2

1.1 Purpose

1.2 Regulatory Information

2. PERFORMANCE................................................... 3

2.1 Band Specification

2.2 HW Features

2.3 RSSI Display

2.4 Current consumption

2.5 Battery bar

2.6 SW Specification

3. TROUBLE SHOOTING..........................................11

3.1 Checking XO Block

3.2 Checking Transceiver DC Power Supply Circuit Block

3.3 Checking DC-DC Block

3.4 ASM Block

3.5 GSM, WCDMA, LTE PART

3.5.1 GSM, WCDMA, LTE PART - PRx

3.5.2 WCDMA, LTE PART – Tx

3.5.3 GSM PART – Tx

3.5.4 GSM,WCDMA, LTE PART - DRX

3.6 Power

3.7 Charger

3.8 Audio Block

3.8.1 Audio receiver

3.8.2 Audio speaker

3.8.3 Audio Main Mic

3.8.4 Audio sub Mic

3.8.5 Audio Ear mic jack

3.9 Checking LCD Block

3.10 Checking Touch Block

3.11 Checking Compass sensor Block

3.12 Checking Accel sensor Block

3.13 Checking Proximity sensor Block

3.14 Checking main camera Block

3.15 Checking front camera Block

3.16 Checking Motor Block

3.17 Checking BT/WIFI Block

3.18 Checking GPS Block

3.19 Checking NFC Block

4. BLOCK DIAGRAM…..................................................... 54

5. BGA PIN MAP............................................................ 66

6. PCB LAYOUT…........................................................... 67

7. MEMORY VARIATION.............................................. 74

8. HIDDEN MENU.......................................................... 75

9. DOWNLOAD…............................................................ 79

10. CALIBRATION............................................................ 80

11. DISASSEMBLE GUIDE............................................... 81

12. EXPLODED VIEW………………………………………... 86

13. REPLACEMENT PART LIST..…………………………. 87

Only training and service purposes

1. INTRODUCTION

2

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

This material is prohibited to share and release to unauthorized person, in accordance with the regulations, LG Electronics, Civil / criminal

responsibility in accordance with the relevant provisions violate.

B. Precautions for repair

• In case of Disassembly or Assembly to repair product, be careful of a product failure caused by RF signals and Static electricity.

• When using Magnetic tool for the Phone's SVC repair, you should check affect the Electric parts according to effect of Magnet.

• When fastening the screw, be careful not to damage the head of screw and even product.

C. Attention

Boards, which contain Electrostatic Sensitive Device (ESD), are indicated by the sign.

Following information is ESD handling:

• Service personal should ground themselves by using a wrist, strap when exchange system board.

• When repair 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 board or parts like EEPROM to the Factory, use the protective package as described.

Only training and service purposes

2.1 Band Specification

3

Support Band TX Freq (MHz) RX Freq (MHz)

WCDMA(FDD1) 1920 – 1980 2110 – 2170

WCDMA(FDD2) 1850 – 1910 1930 – 1990

WCDMA(FDD5) 824 – 849 869 – 894

WCDMA(FDD8) 880 – 915 925 – 960

EGSM 880 – 915 925 – 960

GSM850 824 – 849 869 – 894

DCS1800 1710 – 1785 1805 – 1880

PCS1900 1850 – 1910 1930 – 1990

LTE1 1920 – 1980 2110 – 2170

LTE3 1710 – 1785 1805 – 1880

LTE7 2500 – 2570 2620 – 2690

LTE8 880 – 915 925 – 960

LTE20 832 – 862 791 – 821

LTE38 2570 – 2620 2570 – 2620

2. PERFORMANCE

Only training and service purposes

2.2 HW Features

4

List Type / Spec.

1. Phone Type DOP Type

2. Size 156.3mm x 73.9mm x 8.6mm

3. Weight 169g ( with Battery )

4. Battery 3500mAh(Typ), 3400mAh(Min), 3.87V, (Li-ion)

5.Chipset MT6762 2.0GHz Octa core (Quad x Max 2.0G + Quad x Max 1.5G)

2. PERFORMANCE

6. Memory

7. LCD

8. Touch Type 6.088 inch GFF

9. Main Camera (13M)

32GB(eMMC) + 2GB(LPDDR3) External Memory(SD Card) : Up to 2TB

Size 6.088" HD+ (1560 x 720)

Display Type Active matrix TFT, Transmissive Type

Color 16.7M colors

Resolution HD+(1560(V) x 720(H)), 282ppi

Type CMOS image sensor

Resolution 4160(H) X 3120(V) pixels.

4:3(13.0MP – 4160x3120), 4:3(6.5MP – 2944x2208)

Image Scaling Down

Format Image : JPG, Video : MP4

16:9(9.7MP – 4160x2340), 16:9(4.9MP – 2944x1656) FullVision(8.0MP – 4160x1920), FullVision(4.0MP – 2944x1360) 1:1(9.7MP – 3120x3120), 1:1(3.4MP – 1840x1840)

Only training and service purposes

2.2 HW Features

5

9. Main Wide Camera(W5M) Type CMOS image sensor

Resolution 2560(H) X 1920(V) pixels

Image Scaling Down 4:3(5.0MP – 2560x1920), 4:3(2.5MP – 1824x1368)

16:9(3.7MP – 2560x1440), 16:9(1.9MP – 1824x1026)

FullVision(3.0MP – 2560x1182), Fullvision(1.5MP – 1824x842)

1:1(3.7MP – 1920x1920), 1:1(0.5MP – 720x720)

Format Image : JPG, Video : MP4

2. PERFORMANCE

10. Audio

11. Bluetooth Standard Bluetooth 5.0

12. WLAN Standard IEEE 802.11 b/g/n

Depend on environment 0 ~ 50m (depend on environment)

13. GPS type A-GPS, GLONASS

14. NFC Chipset PN553,NXP

Receiver 08 X 09 X 2.7T Receiver

Speaker 15 X 11 X 2.8T Speaker

Format MP3, AAC, MIDI, EAAC+, OGG, AMR

Effective Distance 10M

Distance 0 m ~ 10 m (depend on environment)

Only training and service purposes

2.3 RSSI Display

6

RSSI BAR GSM RSSI WCDMA RSSI LTE RSSI Comment

2. PERFORMANCE

BAR 5->4 BAR 4->3 BAR 3->2 BAR 2->1 BAR 1->0

- 90dBm± 4dB - 85dBm± 4dB -85dBm ± 4dB

- 95dBm± 4dB - 90dBm± 4dB -95dBm ± 4dB

- 98dBm± 4dB - 96dBm± 4dB -105dBm ± 4dB

- 102dBm± 4dB - 100dBm± 4dB -115dBm ± 4dB

- 104dBm± 4dB - 106dBm± 4dB -128dBm ± 4dB

1. Call Connected & CPIPH Level=-3.3

2. L TE:RSRP

2.4 Current consumption

Stand by

Bluetooth Off Bluetooth Connected

WCDMA Only 11 mA under(DRX=7) 13 mA under(DRX=7) 350mA under(Tx=10dBm) LCD off

GSM Only 11 mA under(PP=5) 13 mA under (PP=5) 360mA under(Lvl=5) LCD off

LTE 11 mA under(LTE 2.56S) 13 mA under(LTE 2.56s) 350mA(@TX 10 dBm)LCD off

Voice Call

(LTE Data connection)

Measurement Condition

VoLTE 11 mA under(LTE 2.56S) 13 mA under(LTE 2.56s) 400mA(@TX 10 dBm) LCD off

Only training and service purposes

2.5 Battery bar

7

Battery Bar icon Specification(%)

2. PERFORMANCE

Level 20 Level 19 Level 18 Level 17 Level 16 Level 15 Level 14 Level 13 Level 12 Level 11 Level 10 Level 9 Level 8 Level 7 Level 6 Level 5 Level 4 Level 3 Level 2 Level 1 3 ~ 7 Level 0 0 ~ 2 Low Battery Pop-up Critical Low battery pop-up Power off Under 1%

16% 15% : One Time popup (No call) There is no pop-up until 5% if you delete pop-up.

6% 5% : One Time popup (No call) There is no pop-up until 3% if you delete pop-up.

98 ~ 100

93 ~ 97 88 ~ 92 83 ~ 87 78 ~ 82 73 ~ 77 68 ~ 72 63 ~ 67 58 ~ 62 53 ~ 57 48 ~ 52 43 ~ 47 38 ~ 42 33 ~ 37 28 ~ 32 23 ~ 27 16 ~ 22 13 ~ 15

8 ~ 12

Only training and service purposes

2. PERFORMANCE

8

2.6 SW Specification

Item Feature Comment

RSSI 0 ~ 5 Levels Battery Charging 0 ~ 100 Levels Key Volume 0 ~ 15 Level Audio Volume 0 ~ 15 Level Time / Date Display Yes Multi-Language Yes depending on build language

Quick Access Mode Phone / Messaging / Camera / Gallery / Chrome Phone / Messaging / Camera / Gallery / Chrome PC Sync No PC Bridge

Speed Dial Yes Voice mail center -> 1 key

Profile Yes not same with feature phone setting CLIP / CLIR Yes

Phone Book

Last Dial Number Yes Last Received Number Yes Last Missed Number Yes Search by Number/Name Yes

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.

Group Yes

Fixed Dial Number Yes

Service Dial Number Yes It depends on operator requirements.

Own Number Yes My Profile (add/edit/delete are supported)

There is no limitation on the number of items.

It depends on available memory amount.

Only training and service purposes

2. PERFORMANCE

9

2.6 SW Specification

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)

SMS Over GPRS No

EMS Melody / Picture Send / Receive / Save No

MMS MPEG4 Send / Receive / Save

There is no limitation on the number of items.

It depends on available memory amount.

Yes

EMS does not support.

 Send / Receive : Yes  Save : depends on content type

Support video content type list

1. video/mp4

2. video/h263

3. video/3gpp2

4. video/3gpp

Long Message MAX 2000 characters The standard of Open vender

Cell Broadcast Yes CB app supports Cell Broadcast message

Download Over the Web Game No Calendar Yes

Memo Yes

World Clock Yes

There is no limitation on the number of items.

It depends on available memory amount.

Only training and service purposes

2.6 SW Specification

10

Unit Convert No

Stop Watch Yes

Wall Paper Yes

WAP Browser No Support only web browser via Chrome. WAP stack and wml are not supported.

Download Melody/Wallpaper Yes Over web browser

SIM Lock Yes

SIM Toolkit Yes

MMS Yes Android Message EONS Yes CPHS Yes V4.2

ENS No

Camera Yes Front 13M, Rear 13M + W5M

JAVA No

Voice Dial No

IrDa No

Bluetooth Yes Ver. 5.0

FM radio No

GPRS Yes Class 12

EDGE Yes Class 12

Hold / Retrieve Yes

Conference Call Yes Max. 6

DTMF Yes

Memo pad No

TTY No

AMR Yes

SyncML No

IM No Hangout was IM, but it's not preloaded anymore.

Email Yes

2. PERFORMANCE

Only training and service purposes

3.TROUBLE SHOOTING

11

3.1 Checking XO Block The output frequency(26MHz) of VCTXO(X15000) is used as the reference one of MT6176

Checking Flow

START

Image

Check TP1

Is it 26MHz?

NO

Replace U4000 and then check TP1

Is it 26MHz?

NO

The Problem may be

Logic part Refer to Logic trouble shoot

YES

XO Circuit is OK.

Check next step

XO Circuit is OK.

Check next step

TP1

R4031

U4000

Circuit Diagram

TP1

R4031

Only training and service purposes

3.2 Transceiver DC Power Supply Circuit

12

Checking Transceiver DC Power Supply Circuit

Checking Flow

START

3.TROUBLE SHOOTING

Circuit Diagram

TP1(1.2V)

C4038

TP2(1.8V)

C4000

Check TP1

+1.2V_RF is OK?

YES

Check TP2

+1.8V_RF is OK?

YES

Check next step

U4000

Image

The Problem may be Logic part

NO

Refer to Logic trouble shoot

The Problem may be Logic part.

Refer to Logic trouble shoot

TP2(1.8V)

TP1(1.2V)

Only training and service purposes

3.3 DC-DC Block

13

Checking DC-DC Block

Checking Flow

START

Check TP1(VSYS)

0.5V ≤ TP1 ≤ 4.2V ?

YES

Check next step

NO

Physical Damage or soldering condition

Check U4103

3.TROUBLE SHOOTING

Circuit Diagram

TP1(VSYS)

C4120

Image

TP1(VSYS)

C4120

U4103

Only training and service purposes

3.4 ASM Block

14

Checking ASM Block

START

3.TROUBLE SHOOTING

Image

Checking Flow

TP2(1.8V)

C4242

Check

TP1, TP2 High Level?

(3.0V≤TP1 ≤4.6V)

(1.65V≤TP2 ≤2.0V)

YES

Check U4211

physical Damage or soldering

condition

OK?

Check Next step

NO

The Problem may be Logic part

Refer to Logic trouble shoot

NOT GOOD

Replace U4211

U4211

Circuit Diagram

TP1(3.5V)

C4238

TP1(3.5V)

C4238

TP2(1.8V)

C4242

Only training and service purposes

3.5 GSM, WCDMA, LTE PART

15

3.5.1 GSM, WCDMA, LTE PART(MB) - PRx

Checking Rx signal path (GSM 1800/1900 WCDMA B1/B2, LTE B1/B3)

Checking Flow

START

3. TROUBLE SHOOTING

Image

TP1/2/3 Signal exist?

Transceiver physical damage

or soldering condition

Check next step

Circuit Diagram

B1

B3/G1800

Check

YES

OK?

NOT GOOD

TP1(B1 PRx) C4275

NO

Check Component

above RF signal path and

ASM or Switch Block

Replace U4000

TP2(B2/G1900 PRx)

C4230

TP3(B3/G1800 PRx)

L4268

B2/G1900

U4000

(MT6177)

TP1(B1 PRx)

C4275

TP2(B2/G1900 PRx)

L4268

TP3(B3/G1800 PRx)

C4230

Only training and service purposes

3.5 GSM, WCDMA, LTE PART

16

3. TROUBLE SHOOTING

3.5.1 GSM, WCDMA, LTE PART(LB/HB) - PRx Checking Rx signal path (GSM850/900, WCDMA B5/B8, LTE B7/B8/B20/B38)

Checking Flow

START

Check

TP1/2/3/4/5 Signal exist?

YES

Check

Transceiver physical damage

or soldering condition

OK?

Check next step

NO

NOT GOOD

Check Component

above RF signal path and

ASM or Switch Block

Replace U4000

TP1(B5/G850 PRx)

L4231

TP4(B20 PRx)

C4243

Image

U4000

(MT6177)

TP3(B7 PRx)

C4285

B5/G850

TP1 (B5/G850 PRx)

L4231

Circuit Diagram

TP5(B38 PRx)

C4176

B8/G900

TP2(B8/G900 PRx)

C4266

Only training and service purposes

3.5 GSM, WCDMA, LTE PART

17

3.5.1 GSM, WCDMA, LTE PART(LB/HB) - PRx Checking Rx signal path (GSM850/900, WCDMA B5/B8, LTE B7/B8/B20/B38)

3. TROUBLE SHOOTING

B7

B38

TP3 (B7 PRx)

C4285

B20

TP5(B38 PRx) C4176

TP4(B20 PRx) C4243

Only training and service purposes

3.5 GSM, WCDMA, LTE PART

18

3.5.2 WCDMA, LTE PART - Tx Checking Tx signal path(WCDMA B1/B2/B5/B8, LTE B1/B3/B7/B8/B20/B38)

3. TROUBLE SHOOTING

Checking Flow

START

Check TP1

VPA_PMU OK?

YES

Check TP1

3.4V≤TP2≤4.4V?

YES

Check TP5~TP14

If LTE of All band

Over 22dBm?

NO

Check TP2~TP4

If WCDMA/LTE of All band

Over 0dBm?

NO

YES

The Problem may be Other part

NO

Check PMIC Logic part

The Problem may be Other part

Check PMIC Logic part

Check component

above RF signal path

and ASM block

Replace U6701

TP11(B8 Tx)

L4121

TP10(B20 Tx)

L4101

TP12(B5 Tx)

L4100

TP6(B3 Tx)

C4126

TP2(LB_input Tx)

C4146

TP7(B2 Tx)

C4128

TP5(B1 Tx)

C4122

Image

TP3

(MB_input TX)

C4116

U4103

(MMPA)

TP1(VBAT)

C4119

TP4(HB_input TX)

C4174

TP8(B38 Tx)

C4105

TP9(B7 Tx)

C4101

Transceiver physical damage

Check

or soldering condition

OK?

Check next step

NOT GOOD

Replace U6701

U4000

(MT6177)

Only training and service purposes

3.5 GSM, WCDMA, LTE PART

19

3.5.2 WCDMA, LTE PART - Tx

3. TROUBLE SHOOTING

Circuit Diagram

MMPA Input

LB_input Tx

MB_input Tx

TP2(LB_input Tx)

C4146

TP3(MB_input Tx)

C4116

TP1(VBAT)

C4119

HB_input Tx

TP4(HB_input TX)

C4174

Only training and service purposes

3.5 WCDMA, LTE PART

20

3.5.2 WCDMA, LTE PART - Tx

3. TROUBLE SHOOTING

MMPA Output

Circuit Diagram

TP6(B3 Tx)

C4126

TP7(B2 Tx)

C4128

TP5(B1 Tx)

C4122

B2 Tx

B1 Tx

B3 Tx

B38 Tx

TP8(B38 Tx)

C4105

Only training and service purposes

3.5 GSM, WCDMA, LTE PART

21

3.5.2 WCDMA, LTE PART - Tx

3. TROUBLE SHOOTING

MMPA Output

Circuit Diagram

TP10(B20 Tx)

L4101

TP11(B8 Tx)

L4121

TP9(B7 Tx)

B20 Tx

B8 Tx

C4101

B7 Tx

TP12(B5 Tx)

L4100

B5 Tx

Only training and service purposes

3.5 GSM, WCDMA, LTE PART

22

3.5.3 GSM PART - Tx Checking Tx signal path(GSM850/900/1800/1900)

Checking Flow

START

3. TROUBLE SHOOTING

Image

Check TP1/2

VBAT/VIO OK?

YES

Check TP5~TP6 If GSM of All band Over 33/29.5dBm?

NO

Check TP3~TP4

If GSM of All band

Over 0dBm?

NO

Check

Transceiver physical damage

or soldering condition

OK?

Check next step

NO

YES

NOT GOOD

The Problem may be Other part

Check PMIC Logic part

Check component

above RF signal path

and ASM block

Replace U4211

TP4(LB_input Tx)

C4211

U4000

(MT6177)

U4211

ASM+GSM PA

TP3

(MB_input Tx)

C4239

TP6(GSM MBTx)

C4223

TP5(GSM LB Tx)

L4236

TP2(1.8V)

C4242

TP1(1.2V)

C4238

Only training and service purposes

3.5 GSM, WCDMA, LTE PART

23

3. TROUBLE SHOOTING

3.5.3 GSM PART - Tx

Circuit Diagram

TP1(1.2V)

C4238

TP3(MB_input Tx)

C4239

TP2(1.8V)

C4242

MB_input Tx

TP4(LB_input Tx)

C4211

GSM Input

LB_input Tx

Only training and service purposes

3.5 WCDMA, LTE PART

24

3.5.3 GSM PART - Tx

GSM Output

3. TROUBLE SHOOTING

Circuit Diagram

GSM850/900 Tx

TP5(GSM LB Tx)

L4236

GSM1800/1900 Tx

TP6(GSM MBTx)

C4223

Only training and service purposes

3.5 GSM, WCDMA, LTE PART

25

3.5.4.1 GSM,WCDMA, LTE PART - DRX Checking DRX RF signal path (GSM850/900/1800/1900 WCDMA B1/B2/B5/B8 LTE B1/B3/B8/B20)

Checking Flow

3. TROUBLE SHOOTING

Image

TP1(VDD) C4311

TP2(VIO) C4313

START

Check TP1, TP2 High Level?

(2.7V≤TP1 ≤2.8V) (1.7V≤TP2 ≤1.9V)

YES

Check SW4300/DIP4300

physical Damage or soldering condition

OK?

TP3/4/5/6/7/8 Signal exist?

Transceiver physical damage

Check

YES

Check

or soldering condition

NOT GOOD

NO

NOT GOOD

The Problem may be Logic part

Refer to Logic trouble shoot

Replace SW4300/DIP4300

NO

Check Component

above RF signal path and

ASM or Switch Block

Replace U4000

TP6(WB1/LTE B1 DRx)

C4342

TP7(G1800/LTE B3 DRx) L4306

TP1(VDD)

C4311

Circuit Diagram

SW4300

TP8(G1900/ WB2 DRx) L4309

DIP4300

TP3 (G850/

WB5 DRx)

C4354

TP4(G900/WB8

/LTE B8 DRx)

C4370

TP5 (B20 DRx)

C4320

TP2(VIO) C4313

OK?

Check Next step

Only training and service purposes

3.5 GSM, WCDMA, LTE PART

26

3.5.4.1 GSM,WCDMA, LTE PART - DRX Checking DRX RF signal path (GSM850/900/1800/1900 WCDMA B1/B2/B5/B8 LTE B1/B3/B8/B20)

3. TROUBLE SHOOTING

TP3(G850/WB5 DRx)

C4354

TP4(G900/WB8/LTE B8 DRx)

C4370

B20 DRX

B1 DRX

TP6(WB1/LTE B1 DRx)

C4342

TP7(G1800/LTE B3 DRx)

L4306

TP8(G1900/WB2 DRx)

L4309

TP5(B20 DRx)

C4320

Only training and service purposes

3.5 GSM, WCDMA, LTE PART

27

3.5.4.2 GSM,WCDMA, LTE PART - DRX Checking DRX RF signal path (LTE B7/B38)

Checking Flow

START

3. TROUBLE SHOOTING

Image

Check J4500/J4303

Connected properly?

YES

Check TP1, TP2 High Level?

(2.7V≤TP1 ≤2.8V) (1.7V≤TP2 ≤1.9V)

YES

Check W4301

physical Damage or soldering condition

OK?

Check

TP3/4 Signal exist?

YES

Check

Transceiver physical damage

or soldering condition

NO

NOT GOOD

NO

NOT GOOD

Re-connet coaxial cable properly

The Problem may be Logic part

Refer to Logic trouble shoot

Replace SW4301

Check Component

above RF signal path and

ASM or Switch Block

Replace U4000

TP2(VIO)

C4308

J4500 J4303

(Coaxial Cable Connector)

TP4(B7 DRx)

R4332

SW4301

TP3(B38 DRx)

R4330

TP1(VDD)

C4310

OK?

Check Next step

Only training and service purposes

3.5 GSM, WCDMA, LTE PART

28

3.5.4.2 GSM,WCDMA, LTE PART - DRX

Checking DRX RF signal path (LTE B7/B38)

TP1(VDD)

R4310

TP2(VIO)

C4308

3. TROUBLE SHOOTING

Circuit Diagram

TP3(B38 DRx)

R4330

TP4(B7 DRx)

R4332

Only training and service purposes

3.6 Power

29

Checking Power signal (Battery connector, Power Key, PMIC Regulator)

Checking Flow

START

BATTERY

CONNECTOR(J2100)

Battery voltage

higher than 3.6V?

YES

Press PWR Key

TP1(TP3204) high to low?

YES

Check

MT6357 Core Voltage level?

NO

Change or charging the Battery

NO

Check POWER_KEY S/W

NO

L1600, L1601, L1602

(Check MT6357)

3. TROUBLE SHOOTING

TP1 (TP3204)

YES

Check

MT6357 IO Voltage level?

YES

Check Main Clock level ?

YES

Check

Battery connector(J2100)

YES

END

NO

L1604(TP2)

(Check MT6357)

X1800(TP3)

(Check MT6357)

Change MT6357

And Return to Start

TP2(L1604)

TP3

(X1800)

Core DC/DC

Inductor(L1600,L1601, L1602)

Only training and service purposes

LG LMX430EMW Owner's Manual [es]