LG LM-X120HM User manual

MODEL : LM-X120HM
Internal Use Only
MOBILE PHONE
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL
Date: June 2019 / Issue 1.0

Copyright ⓒ 2019 LG Electronics. Inc. All right reserved.
Only training and service purposes
LGE Internal Use Only
Table Of Contents
1. INTRODUCTION................................................. 3
1.1 Purpose
1.2 Regulatory Information
2. PERFORMANCE................................................... 4
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..........................................17
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 RF PART
3.5.2 WCDMA PART
3.5.3 LTE PART
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
3.8.6 FM Radio
3.9 Checking LCD Block
3.10 Checking Touch Block
3.11 Checking Compass sensor Block(NO)
3.12 Checking accel & gyro Block
3.13 Checking proximity Block
3.14 Checking main camera Block
3.15 Checking front camera Block
3.16 Checking Motor Block
3.17 Checking BT/WIFI/GPS Block
4. BLOCK DIAGRAM…..................................................... 58
5. CIRCUIT DIAGRAM...................................................... 70
6. BGA PIN MAP............................................................ 71
7. PCB LAYOUT…........................................................... 72
8. MEMORY VARIATION.............................................. 76
9. HIDDEN MENU.......................................................... 77
10. DOWNLOAD…............................................................ 80
11. CALIBRATION............................................................ 81
12. DISASSEMBLE GUIDE............................................... 82
13. EXPLODED VIEW………………………………………... 89
14. REPLACEMENT PART LIST..…………………………. 90
2

Copyright ⓒ 2019 LG Electronics. Inc. All right reserved.
Only training and service purposes
LGE Internal Use Only
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
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.
3

Copyright ⓒ 2019 LG Electronics. Inc. All right reserved.
Only training and service purposes
LGE Internal Use Only
2. PERFORMANCE
2.1 Band Specification
Support Band TX Freq (MHz) RX Freq (MHz)
WCDMA(FDD1) 1922 – 1978 2112 – 2167
WCDMA(FDD2) 1852 – 1908 1932 – 1988
WCDMA(FDD4) 1712 – 1753 2112-2153
WCDMA(FDD5) 826 – 847 871 – 892
WCDMA(FDD8) 882 – 913 927 – 958
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
LTE2 1850 – 1910 1930 – 1990
LTE3 1710 – 1785 1805 – 1880
LTE4 1710 – 1755 2110 – 2155
LTE5 1920 – 1980 2110 – 2170
LTE7 2500 – 2570 2620 – 2690
LTE8 880 – 915 925 – 960
LTE17 704 – 716 734 – 746
LTE28 703 – 748 758 – 2620
LTE66 1710 – 1780 2110 – 2180
4

Copyright ⓒ 2019 LG Electronics. Inc. All right reserved.
Only training and service purposes
LGE Internal Use Only
2. PERFORMANCE
2.2 HW Features
List Type / Spec.
1. Phone Type DOP Type
2. Size 148.6mm x 71.9mm x 8.3mm
3. Weight 145 g ( with Battery )
4. Battery 3,000mAh(Typ) (Li-Ion), 2,890mAh(Min.)
5.Chipset MT6739WW (2.0GHz Ouad-core + 1.5GHz Quad-core)
6. Memory 16GB(EMMC) + 1GB(LPDDR3) External Memory(SD Card) : Up to 2TB
7. LCD Size 5.45 inch
Display Type TFT
Color 16.7M colors
Resolution 480(V) X 960(H)
8. Touch Type 5.45 inch Capacitive type
9. Main Camera (8M) Type CMOS image sensor
Resolution 3264(H) X 2448(V) pixels.
Image Scaling Down 4:3(8.0MP – 3264x2448)
Format Image : JPG, Video : MP4
5

Copyright ⓒ 2019 LG Electronics. Inc. All right reserved.
Only training and service purposes
LGE Internal Use Only
2. PERFORMANCE
2.2 HW Features
10. Audio Receiver 12 X 06 X 2.0T Receiver
Speaker 15 X 11 X 2.5T Speaker
Format MP3, AAC, MIDI, EAAC+, OGG, AMR
11. Bluetooth Standard Bluetooth 4.2
Effective Distance 10M
Distance 0 m ~ 10 m (depend on environment)
12. WLAN Standard IEEE 802.11 b/g/n
Throughput Max 112Mbps
Depend on environment 0 ~ 15m (depend on environment)
13. GPS type A-GPS, Glonass
6

Copyright ⓒ 2019 LG Electronics. Inc. All right reserved.
Only training and service purposes
LGE Internal Use Only
2. PERFORMANCE
2.3 RSSI Display
2.4 Current consumption
Stand by Voice Call
(LTE Data connection) Measurement Condition
Bluetooth Off Bluetooth Connected
WCDMA Only 12 mA under
(DRX=7)
15 mA under
(DRX=7)
500 mA under
(Tx=10dBm) LCD off
GSM Only 12 mA under
(PP=5)
15 mA under
(PP=5)
500 mA under
(Lvl=5) LCD off
LTE 12 mA under
(LTE 2.56S)
15 mA under
(LTE 2.56s)
500 mA under
(@TX 10 dBm)
LCD off
RSSI BAR GSM RSSI WCDMA RSSI LTE RSSI Comment
BAR 4->3 - 85dBm±5dB - 72dBm±3dB -92dBm ±6dB
1. Call Connected & CPIPH Level=-3.3
2. LTE:RSRP
BAR 3->2 - 95dBm±4dB - 80dBm±5dB -102dBm ±5dB
BAR 2->1 - 102dBm±2dB - 91dBm±5dB -113dBm ±5dB
BAR 1->0 - 106dBm±2dB - 101dBm±4dB -121dBm ±4dB
7

Copyright ⓒ 2019 LG Electronics. Inc. All right reserved.
Only training and service purposes
LGE Internal Use Only
2. PERFORMANCE
2.5 Battery bar
Battery Bar icon Specification(%)
Level 20 98 ~ 100
Level 19 93 ~ 97
Level 18 88 ~ 92
Level 17 83 ~ 87
Level 16 78 ~ 82
Level 15 73 ~ 77
Level 14 68 ~ 72
Level 13 63 ~ 67
Level 12 58 ~ 62
Level 11 53 ~ 57
Level 10 48 ~ 52
Level 9 43 ~ 47
Level 8 38 ~ 42
Level 7 33 ~ 37
Level 6 28 ~ 32
Level 5 23 ~ 27
Level 4 16 ~ 22
Level 3 13 ~ 15
Level 2 8 ~ 12
Level 1 3 ~ 7
Level 0 0 ~ 2
Low Battery Pop-up 16% 15% : One Time popup (No call)
There is no pop-up until 5% if you delete pop-up.
Critical Low battery pop-up 6% 5% : One Time popup (No call)
There is no pop-up until 3% if you delete pop-up.
Power off Under 1%
8

Copyright ⓒ 2019 LG Electronics. Inc. All right reserved.
Only training and service purposes
LGE Internal Use Only
2. PERFORMANCE
2.6 SW Specification
Function Detail Item O / X Specification Etc.
OS OS OAndroid P Go
Data Circuit X
Packet O
Connectivity Infrared (IrDA) X
Bluetooth OVer. 5.0
Wi-Fi O802.11 b/g/n
USB OVer. 2.0
USB Mass storage XMTP support
RS232 X
DLNA1.5 X
Voice Function Voice Recording Oapp downloading
Voice Command X
X
X
X
Answering machine X
Memory User Memory OTotal 16GB
OTotal User Memory 12GB (w/o MicroSD)
XMMS
OPictures (Still Image & Moving Image)
OMP3 (Music Contents)
XJava Contents
XWallpaper
XRingtone
Oexternal memory (microSD) up to 32TB
Camera
(Still Capture) Memory OMicroSD
Camera Module O8M AF
Auto Focus O
Digital Zoom O4x
Capture Resolution Orear capture :
3264x2448, 3328x1872,
3264x1632, 2560x1920,
2560x1440, 2560x1280,
2448x2448, 1840x1840
front capture :
2560x1920, 2560x1440,
2560x1280, 1920x1920,
Continuous Shot X
Quality X
Preview Image O
TV-Out X
Flash O
9

Copyright ⓒ 2019 LG Electronics. Inc. All right reserved.
Only training and service purposes
LGE Internal Use Only
2. PERFORMANCE
2.6 SW Specification
Camera (Movie Capture) Movie Resolution ORear
1920x1080, 1280x720
Front
1920x1080, 1280x720
Filter X
Quality X
MPEG Visual Bit Rate XDefault code H.264
And video Bit rate is 17Mbps
We can support MPEG-4, but the bit rate is depend on Application setting
Audio Encode OAAC, , AMR-NB
Audio Decode OAMR
Movie Recode ORecode, Stop, Pause, Resume
Movie Playback OPlay, Stop, Pause
Stream Format (Mux) Omp4, 3gp mp4 – normal
3gp – mms
Stream Format (Demux) Omp4, 3gp mp4 – normal
3gp – mms
Recoding Time OReal Time Recoding
TV-Out X
Audio
Multimedia Voice Codec OAMR/ 3gpp
AAC /AAC+/ EAAC+ O
MP3, WAV O
WMA O
Midi OType 0 and 1 (.mid, .xmf, .mxmf)
RTTTL/RTX (.rtttl, .rtx)
OTA (.ota)
iMelody (.imy)
Music ringtone OMP3, AAC, AAC+, eAAC+, AMR, OGG, FLAC, ALAC, PCM, WMA, OPUS
AMR-NB O
Music player skin OMusic Player
FM Radio O
Speakerphone O
10

Copyright ⓒ 2019 LG Electronics. Inc. All right reserved.
Only training and service purposes
LGE Internal Use Only
2. PERFORMANCE
2.6 SW Specification
Multimedia MPEG4/H.263 OMPEG4 - Decoding : 1080p/30fps/20Mbps
H.263 - Decoding : 704*576/30fps/15Mbps
H.264 ODecoding : 1080p/30fps/20Mbps
WMV X
Normal View OMoving Image Capture & Movie Contents contents size
Wide View OFull Screen mode
Custom DTV Zoom X
Other
Features
File Viewer XAndroid App can be downloaded in Play Store
Macromedia Flash Lite XNot Available
e-Book/e-Comic Book X*.doc, *.jpg, *.gif E-book reader program is not included in ROM. But user can download in internet..
Flight Mode O
Internet Browser WAP
(Windows Mobile 6.0 IE Mobile )
Xversion 2.0
XWML1.3
OXHTML1.1
OHTML4.01 Partially support - HTML 5
Java MIDP X
J2ME support X
Game & Contents X
CLDC X
Flash Flash Game X
Streaming Service H.263+AAC/AMR-NB OH.263 - Decoding : 704*576/30fps/15Mbps
MPEG4+AAC/AMR-NB OMPEG4 - Decoding : 1080p/30fps/20Mbps
WMV9 X
DRM OMA DRM OForward Lock
XSeparate Delivery
XCombined Delivery - Count-only
OTA OTA OOTA 1.0
Display RSSI O6 level (Include No service)
Battery Level Owith percentage Yes
RTC O
Multi Language Odepending on build language.
Quick Access Mode X
PLMN/Service Indicator O
Dimming Clock XBattery power
15s, 30s, 1min, 2min, 5min 10min, 15min
External power
15s, 30s, 1min, 2min, 10min, 15min
Screen timeout supports
11

Copyright ⓒ 2019 LG Electronics. Inc. All right reserved.
Only training and service purposes
LGE Internal Use Only
2. PERFORMANCE
2.6 SW Specification
Normal Features Last Dialed Number O
Last Received Number O
Last Missed Number O
Scratch Pad Memory X
Call Management
Managemen Call Waiting O
Call Swap O
Call Retrieve O
Auto Answer O
Automatic Redial X
Calling Line Identification O
Full Call divert O
Speed Dialing O
Last Number Redial X
Multiparty Call (Conference Call) O
Explicit Call Transfer O
Network Automatic Network Selection O
Manual Network Selection O
Network Service Status O
DTMF DTMF Signaling O
DTMF Enable & Disable X
Audio Key Tone Volume O16 Level (Include Mute)
Ring Tone Volume O16 Level (Include Mute)
Ring Tone Pattern Oogg
Ring Type Silent OVibrator & Ring (Indicator)
Earpiece Volume O16 Level (Include Mute)
Mute O
Cell Broadcast Read Cell Broadcast O
Cell Broadcast Categories X
Cell Broadcast Message Language OSupports filtering with language IDs (German,Italian,French,
Spanish, Dutch,Swedish,Danish,Portuguese,Finnish,Norweggian,
Greek,Turkish,Hungarian,Polish,Czech)
12

Copyright ⓒ 2019 LG Electronics. Inc. All right reserved.
Only training and service purposes
LGE Internal Use Only
2. PERFORMANCE
2.6 SW Specification
Phone Book Entry OName, Phone, Email, Groups, Postal address, Ringtone, Notification Sound,
Phonetic name, Organization, IM, Notes,Nickname, Website, Event
Field OPhone(Mobile,Work,Home,Main, Work Fax,Home Fax,Pager, Other, Custom)
Email(Home,Work,Other,Custom)
Groups(Coworkers,Family,Friends)
Postal address(Home,Work,Other,Custom)
Organization(Company,Title)
IM(AIM,Windows Live,Yahoo,Skype,QQ,Hangouts,ICQ,Jabber,Custom)
Event(Birthday,Anniversary,Other, Custom)
Numeric Store and Recall O
Alphabetic Store O
Alphabetic Recall X
Scroll by alphabetic or numeric order O
Last Number Dialed O
Last Number Missed O
Last Number Received O
Copy & Move XMove not support
Fixed Dial Number O
Barred Dial Number X
Service Dial Number XIt depends on SIM card
Email Entry O
Picture ID ORelating Photo caller ID
My Name card OBluetooth transmission (OPP
Call Cost Last Call Timer X
Last Call Charge Units X
Total Call Timer X
Total Charge Units X
Visible, Audible Call Time/Cost Indication X
Supp. Services Call Forwarding OAll Incoming Calls,
ONo Reply
13

Copyright ⓒ 2019 LG Electronics. Inc. All right reserved.
Only training and service purposes
LGE Internal Use Only
2. PERFORMANCE
2.6 SW Specification
SIM Plug In Type O
SIM Lock O
SIM Toolkit O
Prepaid SIM Operation O
Short Messaging Read Message OEMS Not Support
Write and Edit Message O
Send and Receive Message O
Reply to Message O
Forward Message O
Extract Number from Message O
Message Status O
Message Unread Indicator O
Settable Message Center Number, O
Reply Path and Validity X
Visible and Audible Message Receive Alertin
gO
Voice Mail O
Settable Voice Mail Center Number X
Message Protocol X
Message Overflow Indicator O
Message Center Number O
Help Menu X
Multimedia Messaging Picture Attachable OMax bytes is it, According to inserted usim
Moving Picture Attachable OVideo MMS Max bytes is it, According to inserted usim
Voice Attachable OAMR
Help Menu X
14

Copyright ⓒ 2019 LG Electronics. Inc. All right reserved.
Only training and service purposes
LGE Internal Use Only
2. PERFORMANCE
2.6 SW Specification
Instant Messaging Service IM XAndroid App can be downloaded in Play Store
PC Compatable X
Menu Option X
E-Mail Protocol OIMAP4
OSMTP
OPOP3
XHelp Menu
Voice Instant Messaging Service PTT XFull Duplex
XHalf Duplex
Menu Option XGrouping
XStatus List
XHelp
XOthers
Sound Contents Wallpaper X
Screen Saver X
Ringtones O
Karaoke X
Stutter Sound O
Flip tone X
Button tone Ocan be enable or disable button press sound.
Others X
Calendar New Event O
Edit Event O
Agenda O
Reminder O
Google sync O
Miscellaneous Function Development & Test Facility O
Field Test Facility X
Display Software Version O
IMEI O*#06#
Text Input Language O
Predictive word input OT9 predictive supported.
Scheduler Schedule O
To Do List O
Memo O
D-day counter X
Send via Bluetooth O
World Time Setting Local Time O
Display Two Number of Cities Time X
15

Copyright ⓒ 2019 LG Electronics. Inc. All right reserved.
Only training and service purposes
LGE Internal Use Only
2. PERFORMANCE
2.6 SW Specification
Unit converter X
Stop watch O
Calculator Calculation O
PC Sync Phone Book Sync XPC Bridge supports backup and restore (not sync)
Message Sync xPC Bridge supports backup and restore (not sync)
Multimedia Contents Sync xPC Bridge supports backup and restore (not sync)
Scheduler Sync XPC Bridge supports backup and restore (not sync)
Sync ML DS X
DM X
Game X
Menu Quick Access Mode (Profile) O
External Interface Electrical Man Machine Interface X
Development and Test Facility X
Handset Restore Factory Setting O
Read Software Version O
Battery Charging Mode OUSB/ TA Charging USB/ TA Charging
Security Emergency Call O
Handset Lock O
Security Code O
SIM Lock O
Key guard X
Real Time Clock 12/24 hour O
Calendar O
Time Zone O
Alarm Manager O
Dimming Clock XBattery power
15s, 30s, 1min, 2min, 10min, 15min
External power
15s, 30s, 1min, 2min, 10min, 15min
Screen timeout supports
Power-off Alarm X
On Alarm Event ODisplay
16

Copyright ⓒ 2019 LG Electronics. Inc.
All right reserved. Only training and service purposes
LGE Internal Use Only
3. TROUBLE SHOOTING
The out put frequency(26MHz) of XO(X0801) is used as the reference one of MT6739 internal DCO
3.1 Checking XO Block
Checking Flow
Image
Circuit Diagram
TP1 (X0801)
START
XO Circuit is OK.
Check next step
Is it 26 MHz?
Check other XO signal path
Change X0801
and Retest TP1
NO
NO
YES
3.1 Checking XO Block
TP1 (X0801)
17

Copyright ⓒ 2019 LG Electronics. Inc. All right
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LGE Internal Use Only
3. TROUBLE SHOOTING
The MT6177M operating voltages used two voltage sources 1.8V and 1.2V
3.2 Checking Transceiver DC Power Supply Circuit Block
TP2(1.2V)
START
Check next step
The Problem may be
Logic part Refer to
Logic trouble shoot
Check TP1
+1.8V_RF is OK?
YES
NO
Check TP2
+1.2V_RF is OK?
NO
YES The Problem may be
Logic part Refer to
Logic trouble shoot
Checking Flow Image
Circuit Diagram
TP1(1.8V)
TP1(1.8V)
TP2(1.2V)
18

Copyright ⓒ 2019 LG Electronics. Inc. All right
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LGE Internal Use Only
Check TP1
VBAT is OK?
START
YES
The Problem may be Logic part
Refer to Logic trouble shoot
NO
Check TP2
0.5V ≤ TP2 ≤ 4.4V ?
Check U0704 Physical Damage
or soldering condition
NO
YES
TP1
3. TROUBLE SHOOTING
The PMIC(MT6357, U0704) output voltages is used as the reference one of RF Device
3.3 Checking DC-DC Block
Checking Flow Image
TP2
Circuit Diagram
TP1
TP2
19

Copyright ⓒ 2019 LG Electronics. Inc. All right reserved.
Only training and service purposes
LGE Internal Use Only
3. TROUBLE SHOOTING
Checking ASM Block
3.4 ASM Block
Image
Checking Flow
Check TP1, TP2 High Level?
(3.0V≤TP1 ≤4.6V)
(1.7V≤TP2 ≤1.9V)
START
YES
Check Next step
The Problem may be Logic part
Refer to Logic trouble shoot
NO
Check
U1513 physical Damage
or soldering condition
OK?
NOT
GOOD
Replace U1513
Circuit Diagram
TP2(1.8V)
TP1(3.5V)
TP2(1.8V)
TP1(3.5V)
U1513
(ASM+GSM PA)
20