LG US670 Service Manual

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Table Of Contents

1. Introduction ..................................................2

1.1 Purpose .........................................................................................2

1.2 Regulatory Information ..........................................................2

Product Requirement Spec. ...........................4

1. Product Name ………………………………………………….………...6

2. Supporting Standard ………………………………………….……...6

3. Functions of Major Semi-Conductor ………………………..6

4. HW Feature ………………………………………………………………..7

5. SW Feature …………………………………………………………………8

6. US670 Figure …………………………………………………………….10

2. Product Specification ……………………….11

2.1 LG-US670 Main Feature …………………………………………11

2.2 LG-US670 Main Component ………………………………….12

3. Technical Brief Description ………………15

3.1 Digital Basband(DBB/MSM7627) …………………………...15

3.2 Hardware Architecture …………………………………………...16

3.3 Memory Support Feature ………………….…………………...21

3.4 Power Block ………………………………………….………………...22

3.5 HW Sub System …………………………………….….…………….27

3.6 Audio and sound ……………………………………………………30

3.7 Display ……………………………………………………………………..35

3.8 Proximity Sensor …………………………………………………….36

3.9 Motion Sensor ………………………………………………………..36

3.10 Vibrator ……………………………………………………….………..37

3.11 CDMA RF Transmit/Receive Part ………………….……..38

5. Block Diagram …………………………………….149

6. Circuit Diagram …………………………………...158

7. PCB Layout ………………………..……………….167

8. BGA Pin Map …………………………….………..170

8.1 MSM7627 …………………..............................…………………………..170

8.2 PM7540 ………………………………………………………………………..171

8.3 MCP ……………………………………………………………………………...172

9. Calibration & RF Auto Test Program

(Tachyon) …………………………..………..173

10. Exploded view & Replacement part list .179

4. Trouble Shooting ……………………………..44

4.1 CDMA Rx Part Trouble …………………………………..……….44

4.2 CDMA Tx Part Trouble ……………………………………………70

4.3 Power Trouble ……………………………………………………….114

4.4 Audio Trouble ………………………………………………………..123

4.5 3M Camera Trouble ………………………………………………133

4.6 Main LCD Trouble ……………………………………..………….135

4.7 Key Trouble ……………..…………………………………………….137

4.8 Vibrator Trouble …………..…………………………..…………140

4.9 Proximity Sensor on/off Trouble …………………..……...142

4.10 Motion Sensor on/off Trouble ………………..…………..143

4.11 Compass Sensor on/off Trouble ………………………...145

4.12 Touch Sensor Trouble ………………………………………...148

APCPCWM_4828539:WP_0000001WP_0000001

US670

1. Introduction

1.1. Purpose

This manual provides the information necessary to repair, calibration, description and download the features of this model.

1.2. Regulatory Information

A. Security

Toll fraud, the unauthorized use of telecommunications system by an unauthorized part (for example, persons other than your company’s employees, agents, subcontractors, or person working on your company’s behalf) can result in substantial additional charges for your telecommunications services. System users are responsible for the security of own system. There are may be risks of toll fraud associated with your telecommunications system. System users are responsible for programming and configuring the equipment to prevent unauthorized use. The manufacturer does not warrant that this product is immune from the above case but will prevent unauthorized use of common carrier telecommunication service of facilities accessed through or connected to it. The manufacturer will not be responsible for any charges that result from such unauthorized use.

B. Incidence of Harm

If a telephone company determines that the equipment provided to customer is faulty and possibly causing harm or interruption in service to the telephone network, it should disconnect telephone service until repair can be done. A telephone company may temporarily disconnect service as long as repair is not done.

C. Changes in Service

A local telephone company may make changes in its communications facilities or procedure. If these changes could reasonably be expected to affect the use of the phones or compatibility with the net work, the telephone company is required to give advanced written notice to the user, allowing the user to take appropriate steps to maintain telephone service.

D. Maintenance Limitations

Maintenance limitations on the phones must be performed only by the manufacturer or its authorized agent. The user may not make any changes and/or repairs expect as specifically noted in this manual. Therefore, note that unauthorized alternations or repair may affect the regulatory status of the system and may void any remaining warranty.

E. Notice of Radiated Emissions

This model complies with rules regarding radiation and radio frequency emission as defined by local regulatory agencies. In accordance with these agencies, you may be required to provide information such as the following to the end user.

F. Pictures

The pictures in this manual are for illustrative purposes only; your actual hardware may look slightly different.

G. Interference and Attenuation

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US670

A phone may interfere with sensitive laboratory equipment, medical equipment, etc. Interference from unsuppressed engines or electric motors may cause problems.

H. Electrostatic Sensitive Devices

ATTENTION

Boards, which contain Electrostatic Sensitive Device (ESD), are indicated by the sign. Following information is ESD handling:

• Service personnel should ground themselves by using a wrist strap when exchange system boards.

• When repairs are made to a system board, they should spread the floor with anti-static mat which is also grounded.

• Use a suitable, grounded soldering iron.

• Keep sensitive parts in these protective packages until these are used.

• When returning system boards or parts like EEPROM to the factory, use the protective package as described.

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US670 Product SPEC

US670

Product Requirement SPEC.

November, 4, 2010

(RevA.0)

LG Electronics Inc.

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US670 Product SPEC

− Contents −

1. Product Name ……………………………………………………………6

2. Supporting Standard …………………………………………………..6

3. Main Parts ………………………………………………………………….6

4. H/W Features ………………………………………………………………7

5. S/W Features …………………………………………………………….. 8

6. US670 Figures …………………………………………………………... 10

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US670 Product SPEC

1. Product Name

US670 : US Cellular/US PCS + GPS

(EVDO Rev_0 / EVDO Rev_A)

2. Supporting Standard

Item Feature Comment

Supporting Standard

US Cellular / US PCS/GPS

Frequency Range US Cellular TX : 824.82 ~ 848.19 MHz

US Cellular RX : 869.82~893.19 MHz US PCS TX : 1850~1910 MHz US PCS RX : 1930~1990 MHz GPS : 1575.42 MHz

3. Functions of Major Semi-Conductors

Classification Function MSM7627 Terminal operation control and digital signal processing Memory

(MT29C4G96MAZAPCJA-5IT)

NAND Flash Memory (4G) + SDRAM (4G) Storing of terminal operation program

RTR6500 Converts Rx and Tx RF signal to baseband signal

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US670 Product SPEC

4. HW Features

Item Feature Comment Form Factor DOP Battery

1) Capacity Standard : Li-Ion, 1500mAh

2) Packing Type : Soft Pack

Size Standard : 113.5 x 59 x 13.3(mm) Weight 133g

Volume TBD PCB 3-8 Staggered 10 Layers , 0.8t Stand by time CDMA DCN/PCS over 168 hrs @ SCI=2(pwr: -75dBm) Charging time Up to 300 min @ Power Off/ 1500mAh Talk time CDMA over 180mins @ Rx pwr -92dBm LCD 3.2” HVGA (480x320 pixel) 16M TFT

LCD

Built-in Camera 3.2Mega Auto Focus 3.2M AF Keypad Function Key : 4

Side Key : 5

ANT Main : Internal Fixed Type

MRD : Internal Fixed Type

System connector 5 Pin Ear Phone Jack

4pole, 3.5Φ Ear Jack

Memory NAND Flash : 4Gbit

SDRAM : 4Gbit Speech coding EVRC, QCELP, AMR Data & Fax Built in Data support Vibrator Built in Vibrator Blue Tooth V2.1 + EDR MIDI(for Buzzer

SW decoded

Function) Music Player MP3, AAC, AAC+, WMA, OGG Video Player H.263, H.264, MPEG-4, WMV Camcorder MPEG-4

Function Key: Back, Search, Home, Menu Side Key : PWR, CAM, Google VOICE, Volume up/down

Voice Recording Yes

Speaker Phone mode

Yes Support Trave l A dap te r Yes CDROM No Stereo Headset Yes Data Cable Yes T-Flash

Yes (External Memory)

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US670 Product SPEC

5. SW Features

Item Feature Comment RSSI Yes Battery Charging Yes Key Volume Yes Audio Volume Yes Time / Date Display Yes Multi-Language Yes English, Spanish, Korean,

Chinese Quick Access Mode Camera PC Sync No Speed Dial No Profile No CLIP / CLIR No Phone Book Given Name/Family Name/

Phone: Home/Mobile/Work/Work Fax/Home Fax/Pager/other/Custom Email: Home/Work/Other/Custom IM: AIM/Windows Live/Yahoo/Skype/QQ/Google Talk/ICQ/Jabber/Custom Postal address: Home/Work/Other/Custom Organization: Work/Other/Custom Notes Nickname Website

Last Dial Number Yes Last Dial Numbers, Last

Last Received

Yes Last Dial Numbers, Last

Number

Last Missed Number Yes Last Dial Numbers, Last

Search by Number

Name / Name Group Yes There is no limitation on the

There is no limitation on the number of items. It depends on Available memory amount.

Received Numbers and Last Missed Numbers can store.

Received Numbers and Last Missed Numbers can store .

Received Numbers and Last Missed Numbers can store.

number of items. It depends on available memory amount. Group features can not be added or edited by user.

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US670 Product SPEC

Fixed Dial Number No Service Dial Number No Own Number No Voice Memo No Voice Recording is available but

there isn't relevant application in initial status of this phone.(User

can download it) Call Reminder No Network Selection Automatic /Manual

Mute Yes Call Divert No Call Barring No Call Charge (AoC) No Call Duration No SMS (EMS) There is no limitation on the

number of items. It depends on available

memory amount. SMS Over GPRS No EMS Melody / Picture Send / Receive / Save MMS MPEG4 Send / Receive / Save

No

Yes

Yes Long Message Yes

Cell Broadcast No Download WEB Download Game No

Calendar Yes Memo No World Clock No Unit Convert No Stop Watch No Wall Paper Yes WAP Browser No Support HTML Browser Download Melody /

Yes Android Market Wallpaper SIM Lock No SIM Toolkit No MMS Yes EONS No CPHS No Camera Yes 3.2M AF JAVA No Voice Dial Yes IrDa No Bluetooth Yes Ver. 2.1+EDR

FM radio No

EMS does not support.

(HSP,HFP,A2DP,AVRCP,OPP,FTP)

Hold / Retrieve Yes Conference Call Yes Max. 3

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US670 Product SPEC

DTMF Yes Memo pad No TTY Yes AMR Yes SyncML No IM Yes Google Talk Email Yes

6.

US670 Figures

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2. Product Specification

2.1. LG-US670 Main Features

■ DOP type

■ Main Chipset : MSM7627, Memory (4Gbits NAND Flash + 4Gbits DDR SDRAM)

■ Display : 3.2”, 480 x 320 pixels, 16M Colors, TFT

■ CMX 4.0 compliant(72 Poly)

■ OS : Android 2.2 Froyo

■ Camera : Built-in Camera (3.2M AF pixels, CMOS Image sensor)

■ PMIC : Power control, Charger controller, Battery Voice Safety Recording/Memo/Playback,

Voice Recognition System

■ E911(gpsOne), TTY/TDD

■ Web Browser : Browser

■ 3D Graphics GUI : Menu, Animations, Flash UI

■ Support Micro-SD Card : External Memory

■ Bluetooth 2.1 EDR

■ WLAN 802.11 b/g

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2. Product Specification

2.2 LG-US670 Main Component

Ear Jack

CAMERA

Conn

TOUCH

Conn

MOTOR

Conn

RF Circuit

PMIC

3-AXIS

SENSOR

TCXO

Speaker

Audio

WIFI/BT

Memory

LCD Conn

MSM7627

Sub PMIC

Compass

CHARGING

CIRCUIT

MIC

RF Circuit

T-Flash

Socket

Micro USB

Main board, BOTTOM

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Proximity

Sensor

2. Product Specification

Receiver

Keypad

LED

Main board, TOP

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2. Product Specification

MOTOR

Speaker

Camera

Battery

Contact

LCD FPCB

Main board, Bottom

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3. Technical Brief

3. Technical Brief Description

3.1 Digital Baseband(DBB/MSM7627)

3.1.1 General Description

A. Features(MSM7627)

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3. Technical Brief

3.2 Hardware Architecture

Figure. Simplified Block Diagram

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3. Technical Brief

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3. Technical Brief

맑은 고딕

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3. Technical Brief

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3. Technical Brief

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3. Technical Brief

3.2.1 Architecture and baseband processing features

3.3 Memory support features

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3. Technical Brief

3.4. Power Block

3.4.1. General

MSM7627 is covered by PM7540(Qualcomm PMIC), PM7540 cover the power of MSM7627, memory, RF block(RTR6500), and TCXO. Major power components are :

PM7540(U405) : Phone main PMIC AAT2862(U601) : LCD BLT Charge Pump NUS5530MN(Q401) : main power path switch( battery charging circuit ) MAX14528(U401) : OVP( Over voltage protection) IC

3.4.2 PM7540

The PM7540 device (Figure) integrates all wireless handset power management. The power management portion accepts power from all the most common sources – battery, external charger, adapter, coin cell back-up – and generates all the regulated voltages needed to power the appropriate handset electronics. It monitors and controls the power sources, detecting which sources are applied, verifying that they are within acceptable operational limits, and coordinates battery and coin cell recharging while maintaining the handset electronics supply voltages. Eight programmable output voltages are generated using low dropout voltage regulators, all derived from a common trimmed voltage reference.

A dedicated controller manages the TCXO warm-up and signal buffering, and key parameters (under-voltage lockout and crystal oscillator signal presence) are monitored to protect against detrimental conditions.

MSM7627 device controls and statuses the PM7540 IC using Single Serial Bus Interface (SSBI) supplemented by an Interrupt Manager for time-critical information. Another dedicated IC Interface circuit monitors multiple trigger events and controls the power-on sequence.

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3. Technical Brief

Figure. PM7540 Functional Block Diagram

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3. Technical Brief

3.4.3. Charging control

A programmable charging block in PM7540 is used for battery charging. It is possible to set limits for the charging current. The external supply typically connects directly to pin (VCHG). The

voltage on this pin (VCHG) is monitored by detection circuitry to ascertain whether a valid external supply is applied or not. For additional accuracy or to capture variations over time, this voltage is routed internally to the housekeeping ADC via the analog multiplexer. PM7540 circuits monitor voltages at VCHARGER and ICHARGE pins to determine which supply should be used and when to switch between the two supplies. These pins are connected to the Source (or emitter) and Drain (or collector) contacts of the pass transistor respectively.

1) Pass active transistor is “on” continuously closed-loop controlled to regulate the total current

2) Battery transistor is turned on, connecting battery to VDD node

3) Charging current (blue) flows from the external supply

4) Total current is set by the current regulation loop as described earlier

5) Battery voltage is routed to MSM : MSM HKADC measures VBAT

6) Constant current charging is finished when

the battery reaches its target voltage

NUS5503MN

U8210 Charging Control block

PM7540 only include charging controller.

So it is necessary external charging path TR.

This is NUS5530MN.

This part also include battery side power path.

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NU5530MN

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3. Technical Brief

Constant Current Charging

The PM7540 IC supports constant current charging of the main battery by controlling the charger pass transistor and the battery transistor. The constant current charging continues until the battery reaches its target voltage, 4.2V.

Constant Voltage Charging

Constant voltage charging begins when the battery voltage reaches a target voltage, 4.2V. The end of constant voltage charging is commonly detected 10% of the full charging current.

• Charging Method : CC & CV (Constant Current & Constant Voltage)

• Maximum Charging Voltage : 4.2V

• Maximum Charging Current : 700mA

• Nominal Battery Capacity : 1500mAh

• Charging time : Max 5 Hours

• Full charge indication current (icon stop current) : 200mA

• Cut-off voltage : 3.40V

@ Battery icon display

100 ~ 90%

70% ~ 89%

50% ~ 69%

25

20% ~ 49%

15% ~ 19%

5% ~ 14%

0% ~ 4%

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3. Technical Brief

Trickle Charging

Trickle Charging of the main battery, enabled through SBI control and powered from VDD, is provided by the PM7540 IC, The trickle charger is on-chip programmable current source that supplies current from V nickel-based batteries, with its performance specified below (3.2V). The charging current is set to 80mA.

to pin (VBAT). Trickle charging can be used for lithium-ion and

DD

UnitMaxTypMinParameter

PM7540 Input Power Management

mA1008060Trickle Current

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3. Technical Brief

3.5 H/W Sub system

3.5.1. HS-USB

The universal serial bus (USB) is an interconnection standard widely supported by the electronic industry. The USB2.0 spec defines data rates as low-speed (1.5 Mbps), full-speed (12Mbps) and hi-speed (480 Mbps). When two devices are connected via a USB interface, one of the devices must act as a host, and the other device must act as a peripheral. The host is responsible for initiating and controlling traffic on the bus. The USB specification requires personal computers (PCs) to act as hosts, and other devices such as printers, keyboards, mice, etc. to act as peripherals. The OTG supplement creates a new class of devices called OTG devices. OTG devices can act as either hosts or peripherals, depending upon how they are connected and/or used.

The MSM7627A device contains a new USB high-speed function that is based on a embedded UTMI+ core with a UTMI+ low pin interface (ULPI) compatible port. The MSM device’s ULPI interface connects to an external ULPI PHY chip to complete the design. The ULPI core embedded in the MSM along with the PM7540 IC and a USB high-speed PHY IC provide support for the high-speed interface.

Figure. USB block( MSM7627, MAX14528 )

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3. Technical Brief

3.5.2. KEY

3.5.2.1 Power key

The power key is controlled by PM7540.

PM7540

3.5.2.2 key

The HOT Keys (Home, Menu, Search, Back) and the SIDE Keys (Volume, Camera, Google

Voice) are controlled by MS7627.

Volume Key

MSM7627

CAM Key

Figure. HOT KEY & SIDE KEY

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HOT Key

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3. Technical Brief

3.5.3.Touch Windows Interface

Touch screen is a capacitive sensor with an attached flexible PCB. Touch pannel has 1-I2C line, 1-interrupt line, 1-power line.

MSM7627

M

P

7 5 4 0

< Main connector to Touch Window FPCB >

< Touch Sensor Module FPCB >

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3. Technical Brief

3.6. Audio and sound

3.6.1. Overview of Audio path

MSM7627

EAR10_P EAR10_N

LINE_P LINE_N

HPH_R HPH_L

I2C_SCL

I2C_SDA

EAR_MIC+

MIC+

MIC_BIAS

Receiver

12X07

Audio Sub

System

WM9093

Earjack_R Earjack_L

Speaker

18X10

Earjack

3.5ø

Figure. Block diagram of Audio path

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LG US670 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual