LG LG-H422 User manual
Internal Use Only
Service Manual
LG-H422
Date: MM ,YYYY / ISSUE X.X
Date: Apr, 2015 / Issue 1.0
Copyright ⓒ2014 LG Electronics. Inc. All right
reserved. Only 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..................................................... 4
2.1 Band Specification....................................................... 4
2.2 HW Features…………….................................................. 5
2.3 RSSI Display……………………………………….................... 7
2.4 Current consumption...................................................7
2.5 Battery bar........................................................................8
2.6 SW Specification............................................................ 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…………………...………………………………………….50
3.11 Audio………...………...…………………………………….... 51
3.12 Sensor……………...…………………………………………... 56
3.13 Touch…………...………………………………………………. 58
3.14 Vibrator………....………………………………………….. 59
3.15 Camera…………...…………………………………….……… 60
3.16 LCD………………..…………...……………………………….. 62
4. BLOCK DIAGRAM…............................................ 64
5. CIRCUIT DIAGRAM............................................. 75
6. BGA PIN MAP...................................................... 95
7. PCB LAYOUT…................................................... 96
8. HIDDENMENU.................................................. 101
9. DOWNLOAD…................................................... 104
10. CALIBRATION.......................................................... 105
11. DISASSEMBLE GUIDE............................................. 106
12. EXPLODED VIEW..................................................... 108
13. REPLACEMENT PART LIST..................................... 109
2
Copyright ⓒ2014 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) 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
4
Copyright ⓒ2014 LG Electronics. Inc. All right
reserved. Only training and service purposes
LGE Internal Use Only
2. PERFORMANCE
2.2 HW Features
Item Feature Comment
Form Factor DOP type
Battery
1) Capacity
Standard : Li-Ion, 2100mAh
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 @ Power Off / 21
00mAh
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/
GSM/
GPRS
WCDMA : 23dBm/3.84MHz,+2/-2dBm
EGSM : 33 dBm
GSM850 : 33 dBm
DCS 1800 : 30.7 dBm
PCS 1900 : 30 dBm
Class3(WCDMA)
Class4 (EGSM)
Class4 (GSM850)
Class1 (DCS)
Class1 (PCS)
GPRS compatibility GPRS Class 12
EDGE compatibility EDGE Class 12 Downlink(Rx) Only
SIM card type Plug-In SIM
3V /1.8V
5
Copyright ⓒ2014 LG Electronics. Inc. All right
reserved. Only training and service purposes
LGE Internal Use Only
2. PERFORMANCE
Display Main LCD (4.7”, (1280H) X (720V))
Built-in Camera 8M AF / 1.0M VT
Status Indicator No
Keypad Function Key : 4
Back Key : 3
Function Key: Ho
me, Back, menu, S
IM-switch
Back 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 LPDDR3
Speech coding FR, EFR, HR, AMR
Data & Fax Built in Data & Fax support
Vibrator Built in Vibrator
Bluetooth V4.1
MIDI(for Buzzer Function) 128 Poly
Music Player MP3,AAC,(e)AAC+,WMA,RA,WAV
Video Player
Playback : 30fps 1080p (H.264/263, MPEG
4/2, WMV9, VC1, VP8, DivX, XVID)
Recording : 30fps 1080p (H.264/263, MPE
G4/8)
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
6
Copyright ⓒ2014 LG Electronics. Inc. All right
reserved. Only training and service purposes
LGE Internal Use Only
2. PERFORMANCE
Antenna BAR
Specification
Unit
WCDMA GSM
54 -89 ±2dBm -91 ±2dBm
dBm
43 -94 ±2dBm -96 ±2dBm
32 -100 ±2dBm -99 ±2dBm
21 -104 ±2dBm -103 ±2dBm
10 -110 ±2dBm -105 ±2dBm
Specification
GSM WCDMA
Stand by current
(Sleep & Idle Avg.) Under 7mA @ P.P 5 Under 7mA @ DRX 7
Talk current Under 280 mA
@GSM Level 5
Under 550mA
@ Max Power Avg.
Under 230 mA
@ Tx -10dBm Avg.
2.3 RSSI Display
2.4 Current Consumption
7
Copyright ⓒ2014 LG Electronics. Inc. All right
reserved. Only training and service purposes
LGE Internal Use Only
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%
8
Copyright ⓒ2014 LG Electronics. Inc. All right
reserved. Only training and service purposes
LGE Internal Use Only
2. PERFORMANCE
2.6 SW Specification
Item Feature Comment
RSSI 0 ~ 5 Levels
Battery Charging 0 ~ 20 Levels
Key Volume 0 ~ 7 Level
Audio Volume 0 ~ 15 Level
Time / Date Display Yes
Multi-Language Yes depending on build language
Quick Access Mode Phone / Messaging / Browser/ Applica
tions
Phone / Contact / Messaging /
Applications
PC Sync Yes
Speed Dial Yes Voice mail center -> 1 key
Profile Yes not same with feature phone se
tting
CLIP / CLIR Yes
Phone Book
Name / Number / Email / Groups / Po
stal addresses / Organizations / IM /
Note / Nickname / Website / Event /
There is no limitation on the nu
mber 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 nu
mber of items.
It depends on available memory
amount.
Fixed Dial Number Yes
Own Number Yes My Profile (add/edit/delete are
supported)
Voice Memo Yes Support voice recorder
Network Selection Automatic
Mute Yes
Call Divert Yes
Call Barring Yes
Call Duration Yes
SMS (EMS)
There is no limitation on the number
of items.
It depends on available memory amo
unt.
EMS does not support.
SMS Over GPRS Yes
9
Copyright ⓒ2014 LG Electronics. Inc. All right
reserved. Only training and service purposes
LGE Internal Use Only
2. PERFORMANCE
MMS MPEG4
Send / Receive / Save 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
Long Message MAX 2000 characters The standard of Open vender
Cell Broadcast Yes
Download Over the Web
Calendar Yes
Memo Yes
There is no limitation on the nu
mber of items.
It depends on available memory
amount.
World Clock Yes
Stop Watch Yes
Wall Paper Yes
Download Melody /
Wallpaper Yes Over web browser
SIM Toolkit Yes
MMS Yes Google MMS Client
EONS Yes
CPHS Yes V4.2
Camera Yes 8M AF /
Digital Zoom : x4
Bluetooth Yes Ver. 4.1
FM radio Yes
GPRS Yes Class 12
EDGE Yes Class 12(Rx only)
Hold / Retrieve Yes
Conference Call Yes Max. 6
DTMF Yes
AMR Yes
IM Yes Google Hangout
Email Yes
10
Copyright ⓒ2014 LG Electronics. Inc. All right
reserved. Only training and service purposes
LGE Internal Use Only
3. TROUBLE SHOOTING
WCDMA B1/B5/B8 Rx
Checking Flow Image
Main
Top
3.1 WCDMA Rx Part
11
Copyright ⓒ2014 LG Electronics. Inc. All right
reserved. Only training and service purposes
LGE Internal Use Only
3. TROUBLE SHOOTING
Circuit Diagram
Image
Checking Flow
Main
Top
Checking DC Power supply circuit
3.1 WCDMA Rx Part
TP5
TP1
TP3
TP2
TP4
12
Copyright ⓒ2014 LG Electronics. Inc. All right
reserved. Only training and service purposes
LGE Internal Use Only
3. TROUBLE SHOOTING
Checking MT6166 XO circuit
3.1 WCDMA Rx Part
Circuit Diagram
ImageChecking Flow
Waveform
13
Copyright ⓒ2014 LG Electronics. Inc. All right
reserved. Only training and service purposes
LGE Internal Use Only
3. TROUBLE SHOOTING
Checking RF signal path (FEM)
Checking Flow Image
3.1 WCDMA Rx Part
Main
Top
14
Copyright ⓒ2014 LG Electronics. Inc. All right
reserved. Only training and service purposes
LGE Internal Use Only
3. TROUBLE SHOOTING
3.1 WCDMA Rx Part
Circuit Diagram Image
Waveform
Checking RF signal path (FEM)
TP1
TP3
TP5
TP4
TP2(B8)
TP6
TP2(B5)
TP2(B1)
15
Copyright ⓒ2014 LG Electronics. Inc. All right
reserved. Only training and service purposes
LGE Internal Use Only
3. TROUBLE SHOOTING
Checking RF signal path (DPX)
Checking Flow Image
3.1 WCDMA Rx Part
Main
Top
16
Copyright ⓒ2014 LG Electronics. Inc. All right
reserved. Only training and service purposes
LGE Internal Use Only
3. TROUBLE SHOOTING
3.1 WCDMA Rx Part
Circuit Diagram Image
Waveform
Checking RF signal path (DPX)
TP1(B8)
TP1(B5)
TP1(B1)
17
Copyright ⓒ2014 LG Electronics. Inc. All right
reserved. Only training and service purposes
LGE Internal Use Only
3. TROUBLE SHOOTING
WCDMA B1/B5/B8 Tx
Checking Flow Image
Main
Top
3.2 WCDMA Tx Part
18
Copyright ⓒ2014 LG Electronics. Inc. All right
reserved. Only training and service purposes
LGE Internal Use Only
3. TROUBLE SHOOTING
Circuit Diagram
Image
Checking Flow
Main
Top
Checking DC Power supply circuit
3.2 WCDMA Tx Part
TP5
TP1
TP3
TP2
TP4
19
Copyright ⓒ2014 LG Electronics. Inc. All right
reserved. Only training and service purposes
LGE Internal Use Only
3. TROUBLE SHOOTING
Checking MT6166 XO circuit
Checking Flow Image
Waveform
3.2 WCDMA Tx Part
20
Copyright ⓒ2014 LG Electronics. Inc. All right
reserved. Only training and service purposes
LGE Internal Use Only
3. TROUBLE SHOOTING
Image Circuit Diagram
Checking MT6166 XO circuit
3.2 WCDMA Tx Part
21
Other manuals for LG-H422
4
Table of contents
Other LG Cell Phone manuals
