Internal Use Only
Service Manual LG-H422
Date: Apr, ,YYYY 2015 // ISSUE Issue X.X 1.0 Date: MM
Table Of Contents Contents 1. INTRODU INTRODUCTIO CTION... N....... ........ ........ ........ ........ ........ ........ ........ ........ ........ ........ ...... .. 3 10. CALIBRATION.......................................................... 105 1.1 Purpose......................... Purpose................................................... .................................................... .......................... 3 1.2 Regulatory Information............................................... 3 11. DISASSEMBLE GUIDE............................................. 106 2. PERFORMANCE..................................................... PERFORMANCE..................................................... 4 12. EXPLODED VIEW..................................................... 108 2.1 Band Band Specificat Specification.............. ion.............................................. ......................................... ......... 4 2.2 HW Feature Features………… s……………..................... …................................................. .............................. 5 13. REPLACEMENT PART LIST..................................... 109 2.3 RSSI Display……………………………………….................... 7 2.4 Current Current consumption...................................................7 consumption...................................................7 2.5 Battery Battery bar................................................................ bar........................................................................8 ........8 2.6 SW Specifica Specification............. tion......................................... ............................................... ................... 9 3. TROUBLE SHOOTING..........................................11 3.1 WCDMA Rx Part…………………………….....................11 3.2 WCDMA Tx Part……………….…………………………...…18 3.3 GSM Rx Part.…………..……………………………………… 28 3.4 GSM Tx Part……………………………………………..…… 36 3.5 BT/WIFI Block……………………………………………….… 42 3.6 GPS Block………………………...………………….…….…... 43 3.7 FM RADIO….……………...…………………………………… 45 3.8 Power......……………...……………………………………….. 47 3.9 Charging……………...……………………………………… 48 3.10 USB…………………...………………… USB…………………...…………………………………………. ………………………. 50 3.11 Audio………...………...…………………………………….... 51 3.12 Sensor……………...…………………………………………... 56 3.13 Touch…………...………………………………………………. 58 3.14 Vibrator………....…………………… Vibrator………....……………………………………… …………………….. ….. 59 3.15 Camera…………...…………………………………….……… 60 3.16 LCD………………..…………...…………………………… LCD………………..…………...……………………………….. ….. 62 4. BLOCK DIAGRAM…............................................ 64 5. CIRCUIT DIAGRAM............................................. 75 6. BGA PIN MAP...................................................... 95 7. PCB LAYOUT…................................................... LAYOUT…................................................... 96 8. HIDDEN MENU.................................................. 101 9. DOWNLOAD…................................................... 104
Copyright ⓒ2 014 LG Electronics. Inc. All right reserved. Only training and service purposes
LGE Internal Use Only 2
Table Of Contents Contents 1. INTRODU INTRODUCTIO CTION... N....... ........ ........ ........ ........ ........ ........ ........ ........ ........ ........ ...... .. 3 10. CALIBRATION.......................................................... 105 1.1 Purpose......................... Purpose................................................... .................................................... .......................... 3 1.2 Regulatory Information............................................... 3 11. DISASSEMBLE GUIDE............................................. 106 2. PERFORMANCE..................................................... PERFORMANCE..................................................... 4 12. EXPLODED VIEW..................................................... 108 2.1 Band Band Specificat Specification.............. ion.............................................. ......................................... ......... 4 2.2 HW Feature Features………… s……………..................... …................................................. .............................. 5 13. REPLACEMENT PART LIST..................................... 109 2.3 RSSI Display……………………………………….................... 7 2.4 Current Current consumption...................................................7 consumption...................................................7 2.5 Battery Battery bar................................................................ bar........................................................................8 ........8 2.6 SW Specifica Specification............. tion......................................... ............................................... ................... 9 3. TROUBLE SHOOTING..........................................11 3.1 WCDMA Rx Part…………………………….....................11 3.2 WCDMA Tx Part……………….…………………………...…18 3.3 GSM Rx Part.…………..……………………………………… 28 3.4 GSM Tx Part……………………………………………..…… 36 3.5 BT/WIFI Block……………………………………………….… 42 3.6 GPS Block………………………...………………….…….…... 43 3.7 FM RADIO….……………...…………………………………… 45 3.8 Power......……………...……………………………………….. 47 3.9 Charging……………...……………………………………… 48 3.10 USB…………………...………………… USB…………………...…………………………………………. ………………………. 50 3.11 Audio………...………...…………………………………….... 51 3.12 Sensor……………...…………………………………………... 56 3.13 Touch…………...………………………………………………. 58 3.14 Vibrator………....…………………… Vibrator………....……………………………………… …………………….. ….. 59 3.15 Camera…………...…………………………………….……… 60 3.16 LCD………………..…………...…………………………… LCD………………..…………...……………………………….. ….. 62 4. BLOCK DIAGRAM…............................................ 64 5. CIRCUIT DIAGRAM............................................. 75 6. BGA PIN MAP...................................................... 95 7. PCB LAYOUT…................................................... LAYOUT…................................................... 96 8. HIDDEN MENU.................................................. 101 9. DOWNLOAD…................................................... 104
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LGE Internal Use Only 2
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 repair product, be careful careful of a product product failure failure caused by RF signals and Static electricity. 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: handling: •
Service personal should ground themselves 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.
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LGE Internal Use Only 3
2. PERFORMANCE 2.1 Band Specification Support Band
TX Freq (MHz)
RX Freq (MHz)
WCDMA(FDD1)
1920 – 1980
2110 – 2170
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
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LGE Internal Use Only 4
2. PERFORMANCE 2.2 HW Features Item
Feature
Form Factor
DOP type
Battery
1) Capacity Standard : Li-Ion, 2100mAh
Comment
2) Packing Type : Changeable Size
Standard : 133.25mm x 66.12mm x 9.95mm
mm
Weight
120.4g
With Battery
Volume
62cc
Without Battery
PCB
10 STG Layers , 0.8t
Charging time
4.2hrs
RX sensitivity
WCDMA(FDD1) : -106.7 dBm WCDMA(FDD5) : -104.7 dBm WCDMA(FDD8) : -103.7 dBm EGSM : -105 dBm GSM850 : -105 dBm DCS 1800 : -105 dBm PCS 1900 : -105 dBm
TX output power
WCDMA : 23dBm/3.84MHz,+2/-2dBm EGSM : 33 dBm GSM850 : 33 dBm DCS 1800 : 30.7 dBm PCS 1900 : 30 dBm
WCDMA/ GSM/ GPRS
@ Power Off / 21 00mAh
GPRS compatibility
GPRS Class 12
EDGE compatibility
EDGE Class 12 Downlink(Rx) Only
SIM card type
Plug-In SIM 3V /1.8V
Class3(WCDMA) Class4 (EGSM) Class4 (GSM850) Class1 (DCS) Class1 (PCS)
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LGE Internal Use Only 5
2. PERFORMANCE
Display
Main LCD (4.7”, (1280H) X (720V))
Built-in Camera Status Indicator
8M AF / 1.0M VT No
Keypad
ANT System connector Ear Phone Jack PC synchronization
Function Key: Ho me, Back, menu, S IM-switch
Function Key : 4 Back Key :3
Back Key : Volume up, down, power key
Speech coding Data & Fax Vibrator Bluetooth MIDI(for Buzzer Function)
Main : Internal Fixed Type 5 Pin 3.5Phi, 4 Pole, Stereo Yes NAND Flash : 8GByte SDRAM : 1GByte LPDDR3 FR, EFR, HR, AMR Built in Data & Fax support Built in Vibrator V4.1 128 Poly
Music Player
MP3,AAC,(e)AAC+,WMA,RA,WAV
Memory
micro USB
Playback : 30fps 1080p (H.264/263, MPEG 4/2, WMV9, VC1, VP8, DivX, XVID) Video Player
Camcorder Voice Recording Speaker Phone mode Support
Recording : 30fps 1080p (H.264/263, MPE G4/8) 30fps 720p (Wi-Fi display) MPEG4/8 Yes Yes
Travel Adapter
Yes
CDROM Stereo Headset
No Yes
Data Cable
Yes
T-Flash(External Memory)
Yes
In-box item
In-box item Copyright ⓒ2 014 LG Electronics. Inc. All right reserved. Only training and service purposes
LGE Internal Use Only 6
2. PERFORMANCE 2.3 RSSI Display Specification Antenna BAR
WCDMA
Unit
GSM
54
-89
±2dBm
-91
±2dBm
43
-94
±2dBm
-96
±2dBm
32
-100
±2dBm
-99
±2dBm
21
-104
±2dBm
-103
±2dBm
10
-110
±2dBm
-105
±2dBm
dBm
2.4 Current Consumption
Specification
Stand by current (Sleep & Idle Avg.)
Talk current
GSM
WCDMA
Under 7mA @ P.P 5
Under 7mA @ DRX 7
Under 280 mA @GSM Level 5
Under 550mA @ Max Power Avg. Under 230 mA @ Tx -10dBm Avg.
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LGE Internal Use Only 7
2. PERFORMANCE 2.5 Battery bar
Battery Bar
Specification
Battery Bar
Specification
Bar 20(Full)
98%이상
Bar 9 -> Bar 8
43% -> 42%
Bar 20 -> Bar 19
98% -> 97%
Bar 8 -> Bar 7
38% -> 37%
Bar 19 -> Bar 18
93% -> 92%
Bar 7 -> Bar 6
33% -> 32%
Bar 18 -> Bar 17
88% -> 87%
Bar 6 -> Bar 5
28% -> 27%
Bar 17 -> Bar 16
83% -> 82%
Bar 5 -> Bar 4
23% -> 22%
Bar 16 -> Bar 15
78% -> 77%
Bar 4 -> Bar 3
16% -> 15%
Bar 15 -> Bar 14
73% -> 72%
Bar 3 -> Bar 2
13% -> 12%
Bar 14 -> Bar 13
68% -> 67%
Bar 2 -> Bar 1
8% -> 7%
Bar 13 -> Bar 12
63% -> 62%
Bar 1 -> Bar 0
3% -> 2%
Bar 12 -> Bar 11
58% -> 57%
Power off
1%이하
Bar 11 -> Bar 10
53% -> 52%
Low battery pop-up
15% , 5%, 0%
Bar 10 -> Bar 9
48% -> 47%
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LGE Internal Use Only 8
2. PERFORMANCE 2.6 SW Specification Item RSSI Battery Charging Key Volume Audio Volume Time / Date Display Multi-Language
PC Sync Speed Dial
Feature 0 ~ 5 Levels 0 ~ 20 Levels 0 ~ 7 Level 0 ~ 15 Level Yes Yes Phone / Messaging / Browser/ Applica tions Yes Yes
Profile
Yes
CLIP / CLIR
Yes
Phone Book
Name / Number / Email / Groups / Po stal addresses / Organizations / IM / Note / Nickname / Website / Event /
Last Dial Number Last Received Number Last Missed Number Search by Number/Name
Yes Yes Yes Yes
Quick Access Mode
Comment
depending on build language Phone / Contact / Messaging / Applications Voice mail center -> 1 key not same with feature phone se tting There is no limitation on the nu mber of items. It depends on available memory amount.
There is no limitation on the nu mber of items. It depends on available memory amount.
Group
Yes
Fixed Dial Number
Yes
Own Number
Yes
Voice Memo Network Selection Mute Call Divert Call Barring Call Duration
Yes Automatic Yes Yes Yes Yes
SMS (EMS)
There is no limitation on the number of items. It depends on available memory amo unt.
SMS Over GPRS
Yes
My Profile (add/edit/delete are supported) Support voice recorder
EMS does not support.
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LGE Internal Use Only 9
2. PERFORMANCE
MMS MPEG4 Send / Receive / Save
Yes
Long Message Cell Broadcast Download Calendar
MAX 2000 characters Yes Over the Web Yes
Memo
Yes
World Clock Stop Watch Wall Paper Download Melody / Wallpaper SIM Toolkit MMS EONS CPHS
Yes Yes Yes
Yes Yes Yes Yes
Camera
Yes
Bluetooth FM radio GPRS EDGE Hold / Retrieve Conference Call DTMF AMR IM Email
Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes
Send / Receive : Yes Save : depends on content type Support video content t ype list 1. video/mp4 2. video/h263 3. video/3gpp2 video/3gpp
The standard of Open vender
There is no limitation on the nu mber of items. It depends on available memory amount.
Yes
Over web browser Google MMS Client V4.2 8M AF / Digital Zoom : x4 Ver. 4.1 Class 1 2 Class 12(Rx only) Max. 6
Google Hangout
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LGE Internal Use Only 10
3. TROUBLE SHOOTING 3.1 WCDMA Rx Part WCDMA B1/B5/B8 Rx Checking Flow
Image Main Top
LGE Internal Use Only
Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. Only training and service purposes
11
3. TROUBLE SHOOTING 3.1 WCDMA Rx Part Checking DC Power supply circuit Checking Flow
Circuit Diagram
TP5
TP2
Image Main Top
TP4
TP3
TP1
3. TROUBLE SHOOTING 3.1 WCDMA Rx Part Checking DC Power supply circuit Checking Flow
Circuit Diagram
TP5
TP2
Image
TP3
TP1
TP4
Main Top
LGE Internal Use Only
Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. Only training and service purposes
12
3. TROUBLE SHOOTING 3.1 WCDMA Rx Part Checking MT6166 XO circuit Checking Flow
Image Waveform
Circuit Diagram
3. TROUBLE SHOOTING 3.1 WCDMA Rx Part Checking MT6166 XO circuit Checking Flow
Image Waveform
Circuit Diagram
LGE Internal Use Only
Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. Only training and service purposes
13
3. TROUBLE SHOOTING 3.1 WCDMA Rx Part Checking RF signal path (FEM) Checking Flow
Image Main Top
3. TROUBLE SHOOTING 3.1 WCDMA Rx Part Checking RF signal path (FEM) Checking Flow
Image Main Top
LGE Internal Use Only
14
Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. Only training and service purposes
3. TROUBLE SHOOTING 3.1 WCDMA Rx Part Checking RF signal path (FEM) Circuit Diagram
Image
TP1 TP2(B5)
Waveform
TP2(B8) TP2(B1)
TP3 TP4
3. TROUBLE SHOOTING 3.1 WCDMA Rx Part Checking RF signal path (FEM) Circuit Diagram
Image
TP1 TP2(B5)
Waveform
TP2(B8) TP2(B1)
TP3 TP4
TP5 TP6
LGE Internal Use Only
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15
3. TROUBLE SHOOTING 3.1 WCDMA Rx Part Checking RF signal path (DPX) Checking Flow
Image Main Top
3. TROUBLE SHOOTING 3.1 WCDMA Rx Part Checking RF signal path (DPX) Checking Flow
Image Main Top
LGE Internal Use Only
16
Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. Only training and service purposes
3. TROUBLE SHOOTING 3.1 WCDMA Rx Part Checking RF signal path (DPX) Circuit Diagram
Image
TP1(B8)
Waveform
TP1(B5)
TP1(B1)
3. TROUBLE SHOOTING 3.1 WCDMA Rx Part Checking RF signal path (DPX) Circuit Diagram
Image
TP1(B8)
Waveform
TP1(B5)
TP1(B1)
LGE Internal Use Only
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17
3. TROUBLE SHOOTING 3.2 WCDMA Tx Part WCDMA B1/B5/B8 Tx Checking Flow
Image Main Top
3. TROUBLE SHOOTING 3.2 WCDMA Tx Part WCDMA B1/B5/B8 Tx Checking Flow
Image Main Top
LGE Internal Use Only
Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. Only training and service purposes
18
3. TROUBLE SHOOTING 3.2 WCDMA Tx Part Checking DC Power supply circuit Checking Flow
Circuit Diagram
TP5
TP2
Image Main Top
TP4
TP3
TP1
3. TROUBLE SHOOTING 3.2 WCDMA Tx Part Checking DC Power supply circuit Checking Flow
Circuit Diagram
TP5
TP2
Image
TP3
TP1
TP4
Main Top
LGE Internal Use Only
Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. Only training and service purposes
19
3. TROUBLE SHOOTING 3.2 WCDMA Tx Part Checking MT6166 XO circuit Checking Flow
Image Waveform
3. TROUBLE SHOOTING 3.2 WCDMA Tx Part Checking MT6166 XO circuit Checking Flow
Image Waveform
LGE Internal Use Only
20
Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. Only training and service purposes
3. TROUBLE SHOOTING 3.2 WCDMA Tx Part Checking MT6166 XO circuit Image
Circuit Diagram
3. TROUBLE SHOOTING 3.2 WCDMA Tx Part Checking MT6166 XO circuit Image
LGE Internal Use Only
Circuit Diagram
Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. Only training and service purposes
21
3. TROUBLE SHOOTING 3.2 WCDMA Tx Part Checking B1/B5/B8 TX PA Checking Flow
Image Main Top
3. TROUBLE SHOOTING 3.2 WCDMA Tx Part Checking B1/B5/B8 TX PA Checking Flow
Image Main Top
LGE Internal Use Only
Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. Only training and service purposes
22
3. TROUBLE SHOOTING 3.2 WCDMA Tx Part Checking B1/B5/B8 TX PA Circuit Diagram
Image
TP2(B8)_RFout TP3(VBAT)
Waveform TP1(B5/B8)_RFIN TP2(B5)_RFout
TP1(B1)_RFIN
TP2(B1)_RFout
3. TROUBLE SHOOTING 3.2 WCDMA Tx Part Checking B1/B5/B8 TX PA Circuit Diagram
Image
TP2(B8)_RFout TP3(VBAT)
Waveform TP1(B5/B8)_RFIN TP2(B5)_RFout
TP1(B1)_RFIN
TP2(B1)_RFout
LGE Internal Use Only
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23
3. TROUBLE SHOOTING 3.2 WCDMA Tx Part Checking RF signal path (DPX) Checking Flow
Image Main Top
3. TROUBLE SHOOTING 3.2 WCDMA Tx Part Checking RF signal path (DPX) Checking Flow
Image Main Top
LGE Internal Use Only
24
Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. Only training and service purposes
3. TROUBLE SHOOTING 3.2 WCDMA Tx Part Checking RF signal path (DPX) Circuit Diagram
Image
TP1(B8)
Waveform
TP1(B5)
TP1(B1)
3. TROUBLE SHOOTING 3.2 WCDMA Tx Part Checking RF signal path (DPX) Circuit Diagram
Image
TP1(B8)
Waveform
TP1(B5)
TP1(B1)
LGE Internal Use Only
Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. Only training and service purposes
25
3. TROUBLE SHOOTING 3.2 WCDMA Tx Part Checking RF signal path (FEM) Checking Flow
Image Main Top
3. TROUBLE SHOOTING 3.2 WCDMA Tx Part Checking RF signal path (FEM) Checking Flow
Image Main Top
LGE Internal Use Only
26
Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. Only training and service purposes
3. TROUBLE SHOOTING 3.2 WCDMA Tx Part Checking RF signal path (FEM) Circuit Diagram
Image
TP1 TP2(B5)
Waveform
TP2(B8) TP2(B1)
TP3 TP4
3. TROUBLE SHOOTING 3.2 WCDMA Tx Part Checking RF signal path (FEM) Circuit Diagram
Image
TP1 TP2(B5)
Waveform
TP2(B8) TP2(B1)
TP3 TP4
TP5 TP6
LGE Internal Use Only
Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. Only training and service purposes
27
3. TROUBLE SHOOTING 3.3 GSM Rx Part GSM850/900/DCS/PCS Rx Checking Flow
Image Main Top
3. TROUBLE SHOOTING 3.3 GSM Rx Part GSM850/900/DCS/PCS Rx Checking Flow
Image Main Top
LGE Internal Use Only
Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. Only training and service purposes
28
3. TROUBLE SHOOTING 3.3 GSM Rx Part Checking DC Power supply circuit Checking Flow
Circuit Diagram
TP5
TP2
Image Main Top
TP4
TP3
TP1
3. TROUBLE SHOOTING 3.3 GSM Rx Part Checking DC Power supply circuit Checking Flow
Circuit Diagram
TP5
TP2
Image
TP3
TP1
TP4
Main Top
LGE Internal Use Only
Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. Only training and service purposes
29
3. TROUBLE SHOOTING 3.3 GSM Rx Part Checking MT6166 XO circuit Checking Flow
Image Waveform
3. TROUBLE SHOOTING 3.3 GSM Rx Part Checking MT6166 XO circuit Checking Flow
Image Waveform
LGE Internal Use Only
30
Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. Only training and service purposes
3. TROUBLE SHOOTING 3.3 GSM Rx Part Checking MT6166 XO circuit Image
Circuit Diagram
3. TROUBLE SHOOTING 3.3 GSM Rx Part Checking MT6166 XO circuit Image
LGE Internal Use Only
Circuit Diagram
Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. Only training and service purposes
31
3. TROUBLE SHOOTING 3.3 GSM Rx Part Checking RF signal path (FEM) Checking Flow
Image Main Top
3. TROUBLE SHOOTING 3.3 GSM Rx Part Checking RF signal path (FEM) Checking Flow
Image Main Top
LGE Internal Use Only
Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. Only training and service purposes
32
3. TROUBLE SHOOTING 3.3 GSM Rx Part Checking RF signal path (FEM) Circuit Diagram
Image TP2(DCS/PCS)
TP1
Waveform TP2(GSM850/EGSM)
TP3 TP4
3. TROUBLE SHOOTING 3.3 GSM Rx Part Checking RF signal path (FEM) Circuit Diagram
Image TP2(DCS/PCS)
TP1
Waveform TP2(GSM850/EGSM)
TP3 TP4
TP5 TP6
LGE Internal Use Only
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33
3. TROUBLE SHOOTING 3.3 GSM Rx Part Checking RF Flow(SAW filter) Checking Flow
Image Main Top
3. TROUBLE SHOOTING 3.3 GSM Rx Part Checking RF Flow(SAW filter) Checking Flow
Image Main Top
LGE Internal Use Only
34
Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. Only training and service purposes
3. TROUBLE SHOOTING 3.3 GSM Rx Part Checking RF signal path (FEM) Circuit Diagram
Image
Waveform TP1(DCS/PCS)
TP1(GSM850/EGSM)
3. TROUBLE SHOOTING 3.3 GSM Rx Part Checking RF signal path (FEM) Circuit Diagram
Image
Waveform TP1(DCS/PCS)
TP1(GSM850/EGSM)
LGE Internal Use Only
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35
3. TROUBLE SHOOTING 3.4 GSM Tx Part GSM850/900/DCS/PCS Tx Checking Flow
Image Main Top
3. TROUBLE SHOOTING 3.4 GSM Tx Part GSM850/900/DCS/PCS Tx Checking Flow
Image Main Top
LGE Internal Use Only
Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. Only training and service purposes
36
3. TROUBLE SHOOTING 3.4 GSM Tx Part Checking DC Power supply circuit Checking Flow
Circuit Diagram
TP5
TP2
Image Main Top
TP4
TP3
TP1
3. TROUBLE SHOOTING 3.4 GSM Tx Part Checking DC Power supply circuit Checking Flow
Circuit Diagram
TP5
TP2
Image
TP3
TP1
TP4
Main Top
LGE Internal Use Only
Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. Only training and service purposes
37
3. TROUBLE SHOOTING 3.4 GSM Tx Part Checking MT6166 XO circuit Checking Flow
Image Waveform
3. TROUBLE SHOOTING 3.4 GSM Tx Part Checking MT6166 XO circuit Checking Flow
Image Waveform
LGE Internal Use Only
38
Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. Only training and service purposes
3. TROUBLE SHOOTING 3.4 GSM Tx Part Checking MT6166 XO circuit Image
Circuit Diagram
3. TROUBLE SHOOTING 3.4 GSM Tx Part Checking MT6166 XO circuit Image
LGE Internal Use Only
Circuit Diagram
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39
3. TROUBLE SHOOTING 3.4 GSM Tx Part Checking RF signal path (FEM) Checking Flow
Image Main Top
3. TROUBLE SHOOTING 3.4 GSM Tx Part Checking RF signal path (FEM) Checking Flow
Image Main Top
LGE Internal Use Only
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40
3. TROUBLE SHOOTING 3.4 GSM Tx Part Checking RF signal path (FEM) Circuit Diagram
Image
TP1
Waveform
TP2 (DCS/PCS)
TP3
3. TROUBLE SHOOTING 3.4 GSM Tx Part Checking RF signal path (FEM) Circuit Diagram
Image
TP1
Waveform
TP2 (DCS/PCS)
TP3
TP2 (GSM850/EGSM)
LGE Internal Use Only
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41
3. TROUBLE SHOOTING 3.5 BT/WIFI Block Check BT/WIFI path Checking Flow
Image
TP1
TP3
TP2 U5100
Main Top
Main BTM Circuit Diagram TP3
TP2
TP1
3. TROUBLE SHOOTING 3.5 BT/WIFI Block Check BT/WIFI path Checking Flow
Image
TP1
TP3
TP2 U5100
Main Top
Main BTM Circuit Diagram TP3
LGE Internal Use Only
TP2
TP1
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42
3. TROUBLE SHOOTING 3.6 GPS Block Check GPS path Checking Flow Main Top
TP1
TP4
U5100
TP2 TP3
Main Top TP5
3. TROUBLE SHOOTING 3.6 GPS Block Check GPS path Checking Flow Main Top
TP1
TP4
U5100
TP2 TP3
Main Top TP5
Main BTM
LGE Internal Use Only
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43
3. TROUBLE SHOOTING 3.6 GPS Block Check GPS path Circuit Diagram
TP4 TP3
TP2 TP5
TP1
3. TROUBLE SHOOTING 3.6 GPS Block Check GPS path Circuit Diagram
TP4 TP3
TP2
TP1
TP5
LGE Internal Use Only
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44
3. TROUBLE SHOOTING 3.7 FM RADIO Check FM radio path Checking Flow
Image
TP1
TP2 TP3 Main Top
TP4
Main Top
3. TROUBLE SHOOTING 3.7 FM RADIO Check FM radio path Checking Flow
Image
TP1
TP2 TP3 Main Top Main Top
TP4
U5100
LGE Internal Use Only
45
Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. Only training and service purposes
3. TROUBLE SHOOTING 3.7 FM RADIO Check FM radio path Circuit Diagram
TP3 TP1
TP3
3. TROUBLE SHOOTING 3.7 FM RADIO Check FM radio path Circuit Diagram
TP3 TP1
TP3
TP4
LGE Internal Use Only
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46
3. TROUBLE SHOOTING 3.8 Power The main power source of H422 is provided by 1 chip which is MT6323 Image
Checking Flow Main BOT
IO DC/DC CAPACITOR(C4144) Core DC/DC INDUCTOR(L4130)
PWR KEY(R9107)
BATTERY CONNECTOR(CN9100)
START
Battery voltage
Circuit Diagram
NO Change or charging the Battery
higher than 3.6V?
YES NO Press PWR Key R 9107 high to low?
Check POWER_KEY S/W
YES NO L4130 (Check MT6323)
Check MT6323 Core Voltage level?
YES PWR KEY(R9107)
NO
BATTERY CONNECTOR(CN9100)
C4144(Check MT6323)
Check MT6323 IO Voltage level?
YES NO
IO DC/DC Capacitor(C4109)
3. TROUBLE SHOOTING 3.8 Power The main power source of H422 is provided by 1 chip which is MT6323 Image
Checking Flow Main BOT
IO DC/DC CAPACITOR(C4144) Core DC/DC INDUCTOR(L4130)
PWR KEY(R9107)
BATTERY CONNECTOR(CN9100)
START
Battery voltage
Circuit Diagram
NO Change or charging the Battery
higher than 3.6V?
YES NO Press PWR Key R 9107 high to low?
Check POWER_KEY S/W
YES NO L4130 (Check MT6323)
Check MT6323 Core Voltage level?
YES
BATTERY CONNECTOR(CN9100)
PWR KEY(R9107)
NO C4144(Check MT6323)
Check MT6323 IO Voltage level?
YES IO DC/DC Capacitor(C4109)
NO Check MT6323 RTC CLOCK
C4109(Check MT6323)
YES Check Battery connector (CN9100)
NO
Change MT6323 And Return to Start
YES
Core DC/DC INDUCTOR(L4130)
END
LGE Internal Use Only
47
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3. TROUBLE SHOOTING 3.9 Charging H422 uses Charger IC(liner Charger) for charging control. The Charger IC circuit includes the charging pass transistor detects the VDD and VBAT voltages, and its control driver. The Charger IC maximum charging current is set around 710mA.
Checking Flow
Image
Charging Procedure - Supply the VCHG use a TA or u-USB cable - The Charger IC control the charging current - Charging current flows into the main battery
Main BOT
Troubleshooting Check Point - Connection of the TA or u-USB cable - Main battery Start
Check the Connection of uUSB and battery
NO
Connection OK?
Change I/O connector
Yes
NO
Is the uUSB Cable v oltage 4.9V (or 5.0V)
Change TA (or uUSB Cable)
Yes
Is it charging properly After turning on?
Yes
END
Circuit Diagram
3. TROUBLE SHOOTING 3.9 Charging H422 uses Charger IC(liner Charger) for charging control. The Charger IC circuit includes the charging pass transistor detects the VDD and VBAT voltages, and its control driver. The Charger IC maximum charging current is set around 710mA.
Checking Flow
Image
Charging Procedure - Supply the VCHG use a TA or u-USB cable - The Charger IC control the charging current - Charging current flows into the main battery
Main BOT
Troubleshooting Check Point - Connection of the TA or u-USB cable - Main battery Start
Check the Connection of uUSB and battery
NO
Connection OK?
Circuit Diagram
Change I/O connector
Yes
NO
Is the uUSB Cable v oltage 4.9V (or 5.0V)
Change TA (or uUSB Cable)
Yes
Is it charging properly After turning on?
Yes
END
NO YES
Change the Charger IC ( U4700 )
END
NO
Change the Main PCB
YES
END
LGE Internal Use Only
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3. TROUBLE SHOOTING 3.10 USB USB Checking Flow
Image
Main BOT
Start
Check the Connection of uUSB
CN10001
NO
Connection OK?
Change I/O connector( CN10001)
Circuit Diagram
Yes
Is the signal ok for USB+ & - ? YES
No
Change AP( U2100 )
3. TROUBLE SHOOTING 3.10 USB USB Checking Flow
Image
Main BOT
Start
Check the Connection of uUSB
CN10001
NO
Connection OK?
Change I/O connector( CN10001)
Circuit Diagram
Yes
Is the signal ok for USB+ & - ?
No
Change AP( U2100 )
YES
Change the Main PCB
YES
END
LGE Internal Use Only
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3. TROUBLE SHOOTING 3.11.1 Speaker It’s trouble shooting guide for no sound case. Speaker control signals are generate by MT6323(U4100) If low level volume or breaking the sound, change speaker module Checking Flow
Image Main BOT
Start
Check the Speaker And reconnect Speaker module
Yes
Hear the sound to the Speaker?
L6700, L6701, C6700, C6701
No
Change Speaker Module?
Yes END
No
Check Main PCB. (L6700, L6701, C6700, C6701 ) Speaker Sound OK?
No
Yes END
ANT10003, ANT10004 Circuit Diagram
3. TROUBLE SHOOTING 3.11.1 Speaker It’s trouble shooting guide for no sound case. Speaker control signals are generate by MT6323(U4100) If low level volume or breaking the sound, change speaker module Checking Flow
Image Main BOT
Start
Check the Speaker And reconnect Speaker module
Hear the sound to the Speaker?
Yes
L6700, L6701, C6700, C6701
No
Change Speaker Module?
Yes END
ANT10003, ANT10004 Circuit Diagram
No
Check Main PCB. (L6700, L6701, C6700, C6701 ) Speaker Sound OK?
Yes END
No
Change Main Board
End
LGE Internal Use Only
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3. TROUBLE SHOOTING 3.11.2 Receiver It’s trouble shooting guide for no sound case. Receiver control signals are generate by MT6323(U4100) If low level volume or breaking the voice, chang e RCV module Checking Flow
Image
Start
Check the Receiver . And reconnect RCV module Receiver
Yes
Hear the Voice through the RCV?
R6929, R6930
No
Change RCV Module?
Yes END
Circuit Diagram No
Check Main PCB. (R6929, R6930 ) via Loopback mode Voice OK?
No
Yes END
Main TOP
3. TROUBLE SHOOTING 3.11.2 Receiver It’s trouble shooting guide for no sound case. Receiver control signals are generate by MT6323(U4100) If low level volume or breaking the voice, chang e RCV module Checking Flow
Image
Start
Check the Receiver . And reconnect RCV module Receiver
Yes
Hear the Voice through the RCV?
R6929, R6930
Main TOP
No Yes
Change RCV Module?
END
Circuit Diagram No
Yes
Check Main PCB. (R6929, R6930 ) via Loopback mode Voice OK?
END
No
Change Main Board
End
LGE Internal Use Only
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3. TROUBLE SHOOTING 3.11.3 Main Mic It’s operating voice call(except speakerphone), voice recording, camcorder recording Checking Flow
Image
Start
Main BOT
Check the Mic signal by test mode or Voice recording.
FB6920 Check Mic hole & rubber to make the voice signal?
C6920
Yes
C4103 C4104
No Check parts about Bias and signal Mic works well?
Yes
No Reconnect or change Mic V oice signal OK?
Circuit Diagram Yes Check FB6920, VMIC voltage level (C6920)
No Change MT6323(U4100). Mic works well?
Yes Check C4103, C4104
3. TROUBLE SHOOTING 3.11.3 Main Mic It’s operating voice call(except speakerphone), voice recording, camcorder recording Checking Flow
Image
Start
Main BOT
Check the Mic signal by test mode or Voice recording.
FB6920 Check Mic hole & rubber to make the voice signal?
C6920
Yes
C4103 C4104
No Check parts about Bias and signal Mic works well?
Yes
No
Circuit Diagram
Reconnect or change Mic V oice signal OK?
Yes Check FB6920, VMIC voltage level (C6920)
No Change MT6323(U4100). Mic works well?
Yes Check C4103, C4104
No Change Main Board
End
LGE Internal Use Only
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3. TROUBLE SHOOTING 3.11.4 Sub Mic It’s operating Speakerphone call Checking Flow
Image
Start
FB6921
Check the Mic signal by test mode(SPK Phone)
Check Mic hole & rubber to make the voice signal?
C6922 Yes
Main BOT
C4111 C4112
No Check parts about Mic Bias Mic works well?
Yes
No Reconnect or change Mic Voice signal OK?
Circuit Diagram Yes
No Change MT6323(U4100). Mic works well?
Check FB6921, VMIC voltage level (C6922)
Yes Check C4111,
3. TROUBLE SHOOTING 3.11.4 Sub Mic It’s operating Speakerphone call Checking Flow
Image
Start
FB6921
Check the Mic signal by test mode(SPK Phone)
C6922
Check Mic hole & rubber to make the voice signal?
Yes
Main BOT
C4111 C4112
No Check parts about Mic Bias Mic works well?
Yes
No
Circuit Diagram
Reconnect or change Mic Voice signal OK?
Yes
No Change MT6323(U4100). Mic works well?
Check FB6921, VMIC voltage level (C6922)
Yes Check C4111, C4112
No Change Main Board
End
LGE Internal Use Only
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3. TROUBLE SHOOTING 3.11.5 Ear-Mic -Case A Ear MIC control signals are generate by MT6323(U4100) Case A. Disable detected headset insert. Checking Flow
Image
Main BOT
Start Didn’t display headset icon and play sound via speaker although headset insert Change Ear Jack Connector. Sound play via headset?
No
Yes
Ear Jack Connector
No Check the left signal and detection line short when headset inserted?
Circuit Diagram
Yes, but still not works Change MT6323(U4100). Mic works well?
No
Yes
3. TROUBLE SHOOTING 3.11.5 Ear-Mic -Case A Ear MIC control signals are generate by MT6323(U4100) Case A. Disable detected headset insert. Checking Flow
Image
Main BOT
Start Didn’t display headset icon and play sound via speaker although headset insert Change Ear Jack Connector. Sound play via headset?
Ear Jack Connector
Yes
No
No
Check the left signal and detection line short when headset inserted?
Circuit Diagram
Yes, but still not works Change MT6323(U4100). Mic works well?
Yes
No
Change Main Board
End
LGE Internal Use Only
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54
3. TROUBLE SHOOTING 3.11.6 Ear-Mic– Case B Case B. No Sound from Headset. Check the input power VBAT (FB6200) In case of you can’t heard anything, check C6204, C6205, FB6601, FB6602. Checking Flow
Image
Start
Main BOT
Didn’t play sound via headset although headset insert
C6204, C6205
FB6200
FB6601 FB6602
U4100 Change Ear Jack Connector. Sound play via headset?
Yes
No Check TPA6136A2YRR(U6200) and peripheral circuits Wo rks well?
Yes
Circuit Diagram No Yes Check MT6323(U4100). Works well?
Main TOP
3. TROUBLE SHOOTING 3.11.6 Ear-Mic– Case B Case B. No Sound from Headset. Check the input power VBAT (FB6200) In case of you can’t heard anything, check C6204, C6205, FB6601, FB6602. Checking Flow
Image
Start
Main BOT
Didn’t play sound via headset although headset insert
Main TOP
C6204, C6205
FB6200
FB6601 FB6602
U4100 Change Ear Jack Connector. Sound play via headset?
Yes
No Check TPA6136A2YRR(U6200) and peripheral circuits Wo rks well?
Yes
Circuit Diagram No Yes Check MT6323(U4100). Works well?
No Change Main Board
End
LGE Internal Use Only
55
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3. TROUBLE SHOOTING 3.12.1 Accelerometer & Compass Sensor on/off The Accl. & compass sensors are calibrated by using SW algorithm. Checking Flow
Image
Start
Main BOT
Check the sensor function
Function is OK?
Yes
END
No Calibration OK? -
Yes
END
No
Change the Sensor IC
Function is OK? No
Yes
END
Accelerometer & Compass sensor
3. TROUBLE SHOOTING 3.12.1 Accelerometer & Compass Sensor on/off The Accl. & compass sensors are calibrated by using SW algorithm. Checking Flow
Image
Start
Main BOT
Check the sensor function
Function is OK?
Yes
END
No Calibration OK? -
Yes
END
No
Accelerometer & Compass sensor
Change the Sensor IC
Function is OK?
Yes
END
No Change the main board
Function is OK?
Yes
END
LGE Internal Use Only
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3. TROUBLE SHOOTING 3.12.2 Proximity Sensor on/off Proximity Sensor is worked as below Control the screen’s on/off operation ope ration automatically Checking Flow
Image Main TOP
Start
Send Key click & Phone number click & Call connected Object moved at the Proximity sensor Yes LCD off?
END
No
Circuit Diagram
Check + +2V8_MTK_VIO (C8400)
Sensor Power: C8400 Yes Output work well? No
END
3. TROUBLE SHOOTING 3.12.2 Proximity Sensor on/off Proximity Sensor is worked as below Control the screen’s on/off operation ope ration automatically Checking Flow
Image Main TOP
Start
Send Key click & Phone number click & Call connected Object moved at the Proximity sensor Yes LCD off?
END
No
Circuit Diagram
Check + +2V8_MTK_VIO (C8400)
Sensor Power: C8400 Yes Output work well?
END
No Change the main board
Yes Function is OK?
END
LGE Internal Use Only
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3. TROUBLE SHOOTING 3.13 Touch Touch Sensor Checking Flow
Image +3V0_TOUCH_VD D : TP2
Main BOT
(ZD16011)
Start
Reconnect Touch Module connector (CN16001) +1V8_MTK_VIO (TP1) : TP1
(C16002)
Change MT6323 (U4100)
Touch Woks OK ?
TP3(ZD 16005)
Yes
No No
Check Power +1V8_MTK_VIO (TP1) / +3V0_LCD_VCC(TP2)
Circuit Diagram
Power is OK? Yes
+3V0_TOUCH_VDD :
Check I 2C Line & Signal Line ( TP3, TP4) Touch Works OK?
TP2 (ZD16011)
Yes TP3(ZD1600 5) TP4(ZD1600 6)
No
Change LCM Touch Works OK?
Yes
3. TROUBLE SHOOTING 3.13 Touch Touch Sensor Checking Flow
Image +3V0_TOUCH_VD D : TP2
Main BOT
(ZD16011)
Start
Reconnect Touch Module connector (CN16001) +1V8_MTK_VIO (TP1) : TP1
(C16002)
Change MT6323 (U4100)
Touch Woks OK ?
TP3(ZD 16005)
Yes
No No
Check Power +1V8_MTK_VIO (TP1) / +3V0_LCD_VCC(TP2)
Circuit Diagram
Power is OK? Yes
+3V0_TOUCH_VDD :
Check I 2C Line & Signal Line ( TP3, TP4) Touch Works OK?
TP2 (ZD16011)
Yes TP3(ZD1600 5) TP4(ZD1600 6)
No
Change LCM Touch Works OK?
Yes +1V8_MTK_VIO (TP1) :
TP1 (C16002)
No Change Main Board
End
LGE Internal Use Only
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3. TROUBLE SHOOTING 3.14 Vibrator Motor Type is small cylinder. Checking Flow
Start
Reconnect Connector and check Vibrator. Change MT6323 No
Yes Check Power 3.00V Motor Power is OK? Yes Change IC Vibrator Works well?
Yes
3. TROUBLE SHOOTING 3.14 Vibrator Motor Type is small cylinder. Checking Flow
Start
Reconnect Connector and check Vibrator. Change MT6323
Yes Check Power 3.00V Motor Power is OK?
No
Yes Change IC Vibrator Works well?
Yes
Change Main Board No End
LGE Internal Use Only
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3. TROUBLE SHOOTING 3.15.1 8M Main Camera 8M camera control signals are generated b y MT6582 (U2100 : Main Chipset). And powered by voltage regulator (U4100) Checking Flow
Image Main BOT
MCLK : TP4 (VA7303)
Start MIPI DATA : TP6 CN7300 PIN #7,#8,#10,#11 #17, #18, #20,#21
Check the camera Conn. And reconnect the camera
#1
#30 DVDD : TP2 (C7301)
#15
#16
Yes Camera is OK ? No No
END
AVDD : TP3
MIPI CLK : TP5(CN7300) PIN #13,#14
(C7303)
IOVDD : TP1
Check VIO(TP1), DVDD(TP2), AVDD(TP3)
(C7302)
Yes
Circuit Diagram Change the Main board
No
Check the camera signals MCLK(TP4),MIPI_CLK(TP5), MIPI_DATA(TP6) MCLK : TP4 (VA7303)
Yes Change the Camera
MIPI DATA : TP6 CN7300 Pin #7,#8,#10,#11, #17, #18, #20,#21
DVDD : TP2 (C7301)
IOVDD : TP1 (C7302)
3. TROUBLE SHOOTING 3.15.1 8M Main Camera 8M camera control signals are generated b y MT6582 (U2100 : Main Chipset). And powered by voltage regulator (U4100) Checking Flow
Image Main BOT
MCLK : TP4 (VA7303)
Start MIPI DATA : TP6 CN7300 PIN #7,#8,#10,#11 #17, #18, #20,#21
Check the camera Conn. And reconnect the camera
#1
#30 DVDD : TP2 (C7301)
#15
#16
Yes Camera is OK ?
END
No No
AVDD : TP3
MIPI CLK : TP5(CN7300) PIN #13,#14
(C7303)
IOVDD : TP1
Check VIO(TP1), DVDD(TP2), AVDD(TP3)
(C7302)
Yes
Circuit Diagram No
Change the Main board
Check the camera signals MCLK(TP4),MIPI_CLK(TP5), MIPI_DATA(TP6) MCLK : TP4 (VA7303)
DVDD : TP2 (C7301)
Yes
IOVDD : TP1 (C7302)
MIPI DATA : TP6 CN7300 Pin #7,#8,#10,#11, #17, #18, #20,#21
Change the Camera
Camera is OK ?
Yes
MIPI CLK : TP5(CN730 0) PIN #13,#14
END
AV DD : TP 3 (C7 303)
LGE Internal Use Only
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3. TROUBLE SHOOTING 3.15.2 VT Camera VGA camera control signals are generated b y MT6582 (U2100 : Main Chipset). And powered by voltage regulator (U4100) Checking Flow
Image
Start
AVDD
Main BOT
(C7402)
DVDD
Check the camera Conn. And reconnect the camera
#20
#11
(C7401)
#1
#10
IOVDD (C7400)
MCLK (ZD7400)
Yes Camera is OK ?
END
MIPI CLK PIN #2,#3
No No
MIPI DATA CN7400 PIN #9,#10
Check VIO(TP1), DVDD(TP2), AVDD(TP3)
Circuit Diagram Yes MIPI CLK PIN #2,#3 Change the Main board
No
Check the camera signals MCLK(TP4),MIPI_CLK(TP5), MIPI_DATA(TP6)
Yes Change the Camera
AVDD(C7402)
3. TROUBLE SHOOTING 3.15.2 VT Camera VGA camera control signals are generated b y MT6582 (U2100 : Main Chipset). And powered by voltage regulator (U4100) Checking Flow
Image
Start
AVDD
Main BOT
(C7402)
DVDD
Check the camera Conn. And reconnect the camera
#20
#11
(C7401)
#1
#10
IOVDD (C7400)
MCLK (ZD7400)
Yes Camera is OK ?
END
MIPI CLK PIN #2,#3
No No
MIPI DATA CN7400 PIN #9,#10
Check VIO(TP1), DVDD(TP2), AVDD(TP3)
Circuit Diagram Yes MIPI CLK PIN #2,#3 Change the Main board
No
AVDD(C7402)
Check the camera signals MCLK(TP4),MIPI_CLK(TP5), MIPI_DATA(TP6)
Yes Change the Camera
DVDD
Camera is OK ?
Yes END
LGE Internal Use Only
(C7401)
MIPI DATA CN7400 PIN #9,#10
MCLK (ZD7400)
61
IOVDD (C7400)
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3. TROUBLE SHOOTING 3.16 Main LCD The LCD control signals are generated by MT6582. It needs three external powers like VIO, VCI. And its interface is MIPI having three data lanes and one clock lane. Circuit Diagram
LCD_LED_A: TP5 U4400(C4407) VCI: TP2 (ZD1600, ZD1601) MIPI_DAT A: TP3 (FL16001,F L16002) MIPI_CLK: TP4 (FL16000)
VIO: TP1 (C16002)
3. TROUBLE SHOOTING 3.16 Main LCD The LCD control signals are generated by MT6582. It needs three external powers like VIO, VCI. And its interface is MIPI having three data lanes and one clock lane. Circuit Diagram
LCD_LED_A: TP5 U4400(C4407) VCI: TP2 (ZD1600, ZD1601) MIPI_DAT A: TP3 (FL16001,F L16002) MIPI_CLK: TP4 (FL16000)
VIO: TP1 (C16002)
LGE Internal Use Only
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Copyright ⓒ2 014 LG Electronics. Inc. All right reserved. Only training and service purposes
3. TROUBLE SHOOTING 3.16 Main LCD The LCD control signals are generated by MT6582. It needs three external powers like VIO, VCI. And its interface is MIPI having three data lanes and one clock lane. Checking Flow
Image
Start
Press PWR key turn the power ON
Is the circuit Powered ?
No
Follow the Power ON Troubleshooting
VCI: TP2 (ZD1600, ZD1601)
Yes Disconnect and re-connect LCD Connector(CN16001) Yes LCD display is OK ?
No
Check LCD Power
Yes Change the LCD Module
+1V8_MTK_VIO(TP1), +5V5_DVDDDH(TP2), -5V4_DVDDDL(TP2),
LCD_MIPI_DATA (TP3), LCD_MIPI_CLK (TP4) LM3632(U4400) output LEDA(TP5)
No
MIPI_DAT A: TP3 (FL16001, FL16002)
Main BOT
VIO: TP1 (C16002) MIPI_CLK: TP4 (FL16000)
LCD_LED_A: TP5 U4400(C4407)
3. TROUBLE SHOOTING 3.16 Main LCD The LCD control signals are generated by MT6582. It needs three external powers like VIO, VCI. And its interface is MIPI having three data lanes and one clock lane. Checking Flow
Image
Start
Press PWR key turn the power ON
Is the circuit Powered ?
No
Follow the Power ON Troubleshooting
VCI: TP2 (ZD1600, ZD1601)
Yes Disconnect and re-connect LCD Connector(CN16001) Yes
VIO: TP1 (C16002)
LCD display is OK ?
MIPI_CLK: TP4 (FL16000)
No
Check LCD Power
Yes Change the LCD Module
MIPI_DAT A: TP3 (FL16001, FL16002)
Main BOT
LCD_LED_A: TP5 U4400(C4407)
+1V8_MTK_VIO(TP1), +5V5_DVDDDH(TP2), -5V4_DVDDDL(TP2),
LCD_MIPI_DATA (TP3), LCD_MIPI_CLK (TP4) LM3632(U4400) output LEDA(TP5)
No Change the Main Board
The LCD works
END
LGE Internal Use Only
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4. BLOCK DIAGRAM
2. RF Block Diagram _ MT6582 + MT6166 + MT6627 Platform Filter, Balun Main Antenna GSM Quad UMTS B1/2/5/8
TRX5 TRX6
TX_HB_IN TX_LB_IN
GSM HB_RX GSM LB RX
2 2
LFB21914MDZ3D384 Murata
GSM HB TX
HB_RX LB_RX
2GHB_TX 2GLB_TX
GSM LB TX
B5 DPX TRX2 TRX3 TRX1
3GTX_I 3GTX_Q
2 2
UL_I UL_Q
B5 TRX B8 TRX
RX_I RX_Q
Separator B5/8
B1 TRX(B2 TRX)
B8 DPX
PAM
3GLB_TX 3GH2_TX 3GH1_TX
BSI_CLK BSI_EN BSI_DATA
2 2
3
DL_I DL_Q BSI_CLK BSI_EN BSI_DATA
SKY77758
BSG12PL6
B1DPX
MT6166
Coupling
SKY7 7589
MT6582
2 2 2
3GB5_RX 3GB8_RX 3GB1_RX
B2 DPX
26MHz OZ26000004
PDET_IN
DET
4. BLOCK DIAGRAM
2. RF Block Diagram _ MT6582 + MT6166 + MT6627 Platform Filter, Balun Main Antenna GSM Quad UMTS B1/2/5/8
TRX5 TRX6
TX_HB_IN TX_LB_IN
GSM HB_RX GSM LB RX
HB_RX LB_RX
2 2
LFB21914MDZ3D384 Murata
GSM HB TX
2GHB_TX 2GLB_TX
GSM LB TX
B5 DPX TRX2 TRX3 TRX1
3GTX_I 3GTX_Q
2 2
UL_I UL_Q
B5 TRX B8 TRX
RX_I RX_Q
Separator B5/8
B1 TRX(B2 TRX)
B8 DPX
3GLB_TX 3GH2_TX 3GH1_TX
PAM
BSI_CLK BSI_EN BSI_DATA
2 2
3
DL_I DL_Q BSI_CLK BSI_EN BSI_DATA
SKY77758
BSG12PL6
B1DPX
MT6166
Coupling
SKY7 7589
MT6582
2
3GB5_RX 3GB8_RX 3GB1_RX
2 2
B2 DPX
26MHz OZ26000004
PDET_IN
DET
3G_PA_LB_EN 3G_PA_B2_EN PA_MODE_SEL0 PA_MODE_SEL1 GSM_PA_EN
TX_EN VRAMP BS2 BS1 MODE
GSM_PA_RAMP ANT_SW_SEL_0 ANT_SW_SEL_1
GPIO61 GPIO60 GPIO72 GPIO73 GPIO53 APC GPIO50 GPIO51 GPIO52
ANT_SW_SEL_2
LGE Internal Use Only
Copyright ⓒ2 014 LG Electronics. Inc. All right reserved. Only training and service purposes
65
4. BLOCK DIAGRAM
3. Connectivity Block Diagram SIM/CARD Socket
Ant. NFC
26M_NFC_CLK
NFC_SWP NFC_TX1
Common_I2C_SDA/SCL 2line
BCM20795F
NFC_MODE NFC_IRQ
NFC_TX2
Ant. GPS
26M_WLAN_CLK
Filter + LNA SFMG2XAB 002
26M_WLAN_CLK
GPS_ANT
Ant. BT/WiFi
SPI 3 line
MT6627 WB_ANT
FM_Data_CLK line WiFi_BT_RX_IQ 4 line WiFi_BT_TX_IQ 4 line
Ant. FM Radio
GPS_RX_IQ 4 line FM_ANT
WiFi_BT_Control 6 line
MT6582
4. BLOCK DIAGRAM
3. Connectivity Block Diagram SIM/CARD Socket
Ant. NFC
26M_NFC_CLK
NFC_SWP NFC_TX1
Common_I2C_SDA/SCL 2line
BCM20795F
NFC_MODE NFC_IRQ
NFC_TX2
Ant. GPS
26M_WLAN_CLK
Filter + LNA SFMG2XAB 002
26M_WLAN_CLK
GPS_ANT
Ant. BT/WiFi
SPI 3 line
MT6627
FM_Data_CLK line
WB_ANT
MT6582
WiFi_BT_RX_IQ 4 line WiFi_BT_TX_IQ 4 line
Ant. FM Radio
GPS_RX_IQ 4 line WiFi_BT_Control 6 line
FM_ANT
MT6166
LGE Internal Use Only
Copyright ⓒ2 014 LG Electronics. Inc. All right reserved. Only training and service purposes
66
4. BLOCK DIAGRAM
4. Connectivity (BT/WiFi / FM)
WB_CTRL_5 WB_CTRL_4 WB_CTRL_3 WB_CTRL_2 WB_CTRL_1 WB_CTRL_0
CONN_SPI_CLK CONN_SPI_DATA CONN_SPI_EN CONN_RSTB
WiFi_BT ANT
WB_CTRL5 WB_CTRL4 WB_CTRL3 WB_CTRL2 WB_CTRL1 WB_CTRL0
WB_GPS_RFIN
FM ANT
SCLK SDATA SEN HRST_B
FM_LANT_N FM_LANT_P
FM_DATA FM_CLK
F2W_DATA F2W_CLK
MT6627
AVDD18_WBT
+1V8_MTK_VCN
MT6323
4. BLOCK DIAGRAM
4. Connectivity (BT/WiFi / FM)
WB_CTRL_5
WiFi_BT ANT
WB_CTRL5
WB_CTRL_4
WB_CTRL4
WB_CTRL_3
WB_CTRL3
WB_CTRL_2
WB_CTRL2
WB_CTRL_1
WB_CTRL1
WB_CTRL_0
WB_CTRL0
CONN_SPI_CLK CONN_SPI_DATA CONN_SPI_EN CONN_RSTB
WB_GPS_RFIN
FM ANT
SCLK SDATA SEN HRST_B
FM_LANT_N FM_LANT_P
FM_DATA
F2W_DATA
FM_CLK
F2W_CLK
MT6627
AVDD18_WBT
MT6323
+1V8_MTK_VCN +1V8_MTK_VCN
VCN18
AVDD18_GPS
MT6582
AVDD28_FM
WLAN_CLK 26MHz
MT6166
XO_IN
AVDD33_WBT
LGE Internal Use Only
+2V8_MTK_VCN
VCN28
+3V3_MTK_VCN
VCN33
Copyright ⓒ2 014 LG Electronics. Inc. All right reserved. Only training and service purposes
67
4. BLOCK DIAGRAM
5. Connectivity(GPS)
MT6323 GPS 1574.40 ~ 1576.44MHz
+1V8_MTK_VCN VCN18
8 2 _ N C V
+2V8_MTK_VCN AVDD18_GPS
GPS Filter+LNA Module (SFMG2XAB002/Wisol)
GPS_LNA_EN
7 4 _ O I P G
MT6627 GPS_ANT
GPS_RFIN N P N Q Q I P I _ _ _ _ X X X X R R R R _ _ _ _ S S S S P P P P G G G G
4. BLOCK DIAGRAM
5. Connectivity(GPS)
MT6323 GPS 1574.40 ~ 1576.44MHz
+1V8_MTK_VCN VCN18
8 2 _ N C V
+2V8_MTK_VCN AVDD18_GPS
MT6627
GPS Filter+LNA Module
GPS_ANT
GPS_RFIN N P N Q Q I P I _ _ _ _ X X X X R R R R _ _ _ _ S S S S P P P P G G G G
(SFMG2XAB002/Wisol)
GPS_LNA_EN
7 4 _ O I P G
GPS_RX_Q_N GPS_RX_Q_P GPS_RX_I_N GPS_RX_I_P
GPS_RXQN GPS_RXQP GPS_RXIN GPS_RXIP
MT6582 LGE Internal Use Only
Copyright ⓒ2 014 LG Electronics. Inc. All right reserved. Only training and service purposes
68
4. BLOCK DIAGRAM
6. Output Power Management +1V8_MTK_VIO
eMMC
+3V3_MTK_eMMC +1V2_MTK_LPDDR3
PMIC MT6323
B5 DPX
VM (700mA)
+2V8_MTK_VTCXO
B1 DPX
(40mA)_VTCXO
VTCXO28/V28 +1V825_MTK_VRF
AP Ear jack
+1V8_MTK_VIO
AVDD28_DAC AVDD33_USB
+2V8_MTK_VTCXO +3V3_MTK_VUSB +1V15_MTK_PROC
(600mA)_VPA VTCXO (40mA) VUSB (20mA) VPROC1/ VPROC2/ VPROC3
+2V8_MTK_VA
SPK_RCV _S/W
Proximity
PAM
VBAT
B2 DPX
AVDD_VIO18/XMODE
SKY77589
+2V8_MTK_VCN
1V8_MTK_VCN VCN18 +
Tx module
LNA
AVDD28_FM
IC WIFI
AVDD18_WBT /AVDD18_GPS
VBAT
VA (150mA)
+1V8_MTK_VIO
Touch
Accel Compass
MT6166 Transceiver
+3V4_MTK_VPA
(30mA)_VCN28
+5V0_SPK_BOOS T +1V8_MTK_VIO
Hall IC
VRXHF
+1V8_MTK_VIO
VCCK_VPROC
Audio_sub_ System
(200mA)_VRF18
+1V8_MTK_VIO
MT6582
B8 DPX
seperator
VEMC_3v3 (400mA)
+3V0_TOUCH_VDD
VGP1 (100mA) (150mA)_VCAMA
+1V8_MTK_VIO
+2V8_MAIN_CAM_AVDD
Ext LDO for LCD
VBAT
+1V8_MTK_VIO +2V8_MTK_VIO
VIO28 (200mA)
+1V2_EXT_LDO_CAM_DVDD +1v8_MAIN_CAM_iIOVDD
+1V8_MTK_VIO
(100mA)_VCAM_IO
(100mA)VCAM_AF
+1V8_LCD_IO (150mA)_VCAMD
+1V8_MTK_VIO
Micro_SD_
+3V0_MTK_USIM1 VSIM1 (50mA) +3V0_USIM_NFC
VBAT
+5V5_DDVDH -5V4_DDVDL
+2V8_MAIN_CAM_AF
4.7” LCD
LCD_LED_A
SUB PMIC
