LG GB125 Service Manual

1

LG Electroni

cs

GB125

GB125

GB125GB125

Service Manual

Service Manual

Service ManualService Manual

2

Table Of Contents

1. INTRODUCTION…………………..3

1.1 Purpose…………………………………..3

1.2 Regulatory Information………………….3

2. PERFORMANCE…………………...5

2.1 H/W Features…………………………….5

2.2 S/W Features……………………………..6

3. TECHNICAL BRIEF………………11

3.1 Digital Main Processor( PMB7880)…….11

3.2 Power Amplifier Module

3.3 26 MHz Clock (DCXO)…………….…...21

3.4 RTC(32.768KHz Crystal)………...……..22

3.5 LCD Interface……………………..…….23

3.6 SIM Card Interface……………………...24

3.7 KEYPAD Interface……………………...25

3.8 Battery Charging Block Interface…….…26

3.9 RF Interface………………………....…..27

3.10 Audio Interface…………………….…..29

(SKY77318/SKY77317)

18

4.13 Speaker Trouble………………………..71

4.14 Headphone Trouble…………………….73

4.15 Charging Trouble………………………76

4.16 FM Radio Trouble……………………..78

5. DOWNLOAD………………………82

5.1 Download setup…………………………82

5.2 Download Process……………………….83

6. BLOCK DIAGRAM……………….96

7. CIRCUIT DIAGRMA……………..97

8. BGA IN PIN Check……………….102

9. PCB LAYOUT…………………….104

10.ENGINEERING MODE…………106

3.11 Key LED Interface……………….…….31

3.12 Vibrator Interface………………….…...32

3.13 Memory Interface……………………...33

3.14 Power Block Interface…………….……34

3.15 FM Radio Interface…………………….36

4. TROUBLE SHOOTING…………..38

4.1 RF Trouble………………………………38

4.2 TX Trouble………………………….…...44

4.3 Power On Trouble……………………….50

4.4 SIM Card Trouble……………………….53

4.5 Vibrator Trouble…………………………55

4.6 Keypad Trouble………………………….57

4.7 RTC Trouble……………………………..59

4.8 Key Backlight Trouble…………………..61

4.9 LCM Backlight Trouble…………………63

4.10 LCD Trouble…………………………...65

4.11 Microphone Trouble……………………67

11.CALIBRATION…………………..108

11.1 Test equipment setup…………..……...108

11.2 APT Technologies…………………….108

12. Stand alone test…………………..123

12.1 Test Program Setting………………….123

12.2 TX Test ……………………………....126

12.3 RX Test……………………………….127

13. EXPLODED VIEW&
REPLACEMENT PART LIST……..128

13.1 Exploded View………………………..128

13.2 Replacement Part……………………..130

4.12 Receiver Trouble……………………….69

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1. INTRODUCTION

1.1 Purpose

This manual provides information necessary to repair, 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 dose not warrant that

this product is immune from the above case but will prevent unauthorized use of common-carrier

telecommunications 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 this phone or compatibility with

the network, 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 this model 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.

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Therefore, note that authorized 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

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 Devices(ESD),are indicated by the sign .

Following information is ESD handing:

. 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 packages

as described.

5

2. PERFORMANCE

2.1 H/W Features

Solution EGOLD voice PMB7880 (ULC2) Infineon

Type Folder type

Antenna Type Internal (dual-Band)

Main Display 1.5” 128x128 CSTN/65k

Battery 950mAh Li-ion inner pack 950mAh: (55x34x50mm)

Audio player MIDI ring tone, 16poly MIDI ring tone

FM Receiver

Embedded FM antenna Yes

Loud Speaker Yes 18*13(4.05T) Recheck

Memory Size 32Mb+4Mb No user memory

LMT (Lost Mobile Tracker) Yes

Yes , US/Europe band support

(Optional) (87.5 88~108MHz) Recheck

Pogo pin contact FPC type

FM Antenna on Battery

cover.

Asia, Middle East, Africa:

LMT Support

China: M-DOG

CIS: Based on CIS CA

requirement

LA: Based on operator

request

EU: Based on operator

request

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2.2 S/W Features

Feature Detail Item Description

OS OSE Operating System Y

Audio

y Bands

Speech Code FR,EFR,HR,AMR-NB Y

AMR code GSM Full Rate

3GPP Adaptive Multi Rate (AMR-NB)

FM Radio Y

MP3 Ring Tone MP3 decode N

Integrated hands free

speaker

Key Tone Volume 6 Level (Include Mute) Y

Ring Tone Volume 6 Level (Include Mute) Y

Ring Tone 10 Midi Y

Call Alert type Ring, Vibrate, Ring & Vibrate, Ring after vibrate, Silent Y

Earpiece Volume 6 Level (Include Mute) Y

Mute Y

GSM dual band MS

900-1800

PCS dual band MS

Speaker phone mode Y

Y Frequenc

Configuration is during software compile time. Y

Y

Service

Connecti

vity

Voice

Function

Display

850-1900

Circuit N Date

Packet N

Infrared (IrDA) N

Bluetooth N

USB N

USB Mass storage N

RS232(UART) Only for Phone tool & download Y

Voice Recording N

Voice Command N

Answering machine N

RSSI 6 level (0~5Level) Y

Battery level 4 level (0~3Level) Y

RTC Date & Time Display Y

PLMN/Service

Indicator

Y

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Call

History

Call

Manage

Quick Access Mode

In Idle

Dimming mode Y

Dual Clock N

Home shortcut Display Shortcut icon in Idle Y

Last Dial Number Max : 20 records Y

Last Received

Number

Last Missed Number Max : 20 records Y

Scratch Pad Memory N

Call Duration Last Call time, Total Call Time Y

Last Call Charge

Units

Total Charge Units N

Call Waiting Y

Call Swap Y

Profile/ SMS + Voice Mail Y

Max : 20 records Y

N Call Cost

ment

Network

Call Retrieve Y

Auto Answer Y

Auto Redial Y

Calling Line Y

Full Call Divert Y

Speed Dialing Y

Last Number Redial Y

Multi Party Call Y

ECT Explicit Call Transfer (4 + Send) N

Automatic Network

Selection

Manual Network Y

Preferred Network Y

Network Service

Status

DTMF Signaling Y DTMF

Y

Y

Cell

Broadcas

t

DTMF Enable &

Disable

Read Cell Broadcast Y

On/Off setting Receive On/Off Y

Alert setting Y

Y

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Language setting Y

Topics Setting Y

Contacts(

Phone

Book)

Supplementary

Services

Entry Phone 300 + SIM Y

Field Name, Mobile, Home, Office Y

Copy ME <-> SIM Y

Move ME <-> SIM , Y

FDN Y

SDN Y

Email Entry N

Picture ID N

Video Caller ID N

vCard N

Business Card Y

Delete Delete, Delete All(SIM or Phone), Multi Delete Y

CFU Call Forwarding Unconditional Y

CFB Call Forwarding on Mobile Subscriber Busy Y

CFNRy Call Forwarding on No Reply Y

SIM

Short

Message

CFNRc Call Forwarding on Mobile Subscriber Not Reachable Y

BAOC Barring of All Outgoing Calls Y

BOIC Barring of Outgoing International Calls Y

BOICexHC Barring of Outgoing International Calls except those

directed to the Home PLMN Country

BAIC Barring of All Incoming Calls Y

BICRoam Barring of Incoming Calls when Roaming Outside

the/Home PLMN Country

Conference Call Upto 5 calls + 1 Waiting Call. Y

Plug in Type 3V & 1.8 V Y

SIM Lock Service Provider / Network Lock / Hard Lock Y

SIM Toolkit Support Class 1 to 3 Y

Read Message Y

Write and Edit

Message

Send and Receive

Y

Y

Y

Y

Message

Reply to Message Y

Forward Message Y

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Extract Number from

Message

Message Status Y

Message Unread Y

Settable Message

Center Number,

Reply Path and

Validity

Visible and Audible

Message Receive

Voice Mail Y

Settable Voice Mail

Center Number

Message Protocol Normal, Fax, National Paging, X400,

Message Overflow

Y

Y

Y

Y

Y

ERMES, Voice

Y

Miscellaneous

Function

Input

Indicator

Message Center

Number

Nokia Smart Message

Development & Test

Facility

Field Test Facility Y

Display Software

Version

IMEI Y

Restore Factory

Setting

Battery Charging

Mode

Language Selectable Auto Language Y Text

Predictive word input T9 Y

Y

Not supported.

[Can be supported based on operator request]

Y

Y

Y

Y

N

Schedule

r

World Setting Local Time Y

Calendar MAX: 20 records (18 chars) Y

To Do N

Memo MAX: 10 records (80 chars) Y

10

Time

Unit

converter

Stop

Watch

Calculato

r

Game Will use Ruby’s Game, 1 game Y

Security

Display Two

Cities Time

Daylight saving Y

NITZ Y

Length, Weight, Volume, Surface,

Y

+ - * / Y

Phone Book Sync Only For service Center Y PC Sync

Message Sync N

Emergency Call Y

Handset Lock Y

Security Code When Delete All Y

Dual Clock N

Velocity, Temperature, User-defined

Y

SIM Lock Y

Keypad Lock Y

Real

Time

Clock

Accessor

y

Stereo earmic with

12/24 Hour Y

Calendar Y

Time Zone Y

Daylight saving Y

Alarm Manager Y

Dimming Clock N

Power-off Alarm Y

On Alarm Event Y

Mobile Tracking

software

M-DOG For China Y

microSD Adapter N

For India, Asia Y Others

Earmic type Sterio with hook key.

Y

hook switch

Only FM play supports Stereo.

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3. TECHNICAL BRIEF

3.1 Digital Main Processor

Figure.3-1 PMB7880 FUNCTIONAL BLOCK DIAGRAM

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3.1.2 Features

Baseband

• High performance fixed-point TEAKlite DSP

• C166S high performance microcontroller

• There are several Interfaces:

– I2S interface for DAI connections (for Tape Approval)

– High Speed SSC Interface for connection of external peripherals

– SIM Interface

– Keypad Interface (6x4 or 5x5 keys)

– EBU for external RAM/FLASH connection

– Asynchronous serial interface (incl. IrDA support capability)

– JTAG Interface

– Black & white and color displays are supported

– PWM source to drive vibrator

– Keypad and display backlight supported.

Receiver

• Constant gain, direct conversion receiver with fully integrated blocking filter

• Two integrated LNAs

• No need of interstage and IF filter

• Highly linear RF quadrature demodulator

• Programmable DC output level

• Very low power budget.

Transmitter

• Digital Sigma-Delta modulator for GMSK modulation, typical -163.5 dBc/Hz @ 20 MHz

• Single ended outputs to PA, Pout = +3.5 dBm

• Very low power budget.

RF-Synthesizer

• ΣΔSynthesizer for multi-slot operation

• Fast lock-in times (< 150 μs)

• Integrated loop filter

• RF Oscillator

• Fully integrated RF VCO.

Crystal Oscillator

• Fully digital controlled crystal oscillator core with a highly linear tuning characteristic.

Mixed Signal and Power Management Unit

• DC/DC boost for voltages up to 15 V for driving White or Blue LEDs

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• 8-Ohm loud speaker driver (250/350 mW)

• 16-Ohm earpiece driver

• 32-Ohm headset driver

• 4 measurement interfaces (PA temperature, battery voltage, battery temperature, and

ambient temperature)

• Differential microphone input

• System start up circuitry

• Charger circuitry for NiCd, NiMh and LiIon cells

• Integrated regulators for direct connection to battery.

15

3.1.3 GSM System Description

The E-GOLDvoice is suited for mobile stations operating in the GSM850/900/1800/1900

bands. In the receiver path the antenna input signal is converted to the baseband, filtered, and

then amplified to target level by the RF transceiver chip set. Two A-to-D converters generate

two 6.5 Mbit/s data streams. The decimation and narrowband channel filtering is done by a

digital baseband filter in each path. The DSP performs:

1. The GMSK equalization of the received baseband signal (SAIC support available)

2. Viterbi channel decoding supported by an hardware accelerator.

The recovered digital speech data is fed into the speech decoder. The E-GOLDvoice

supports fullrate, halfrate, enhanced fullrate and adaptive multirate speech CODEC

algorithms.

The generated voice signal passes through a digital voiceband filter. The resulting 4 Mbit/s

data stream is D-to-A converted by a multi-bit-oversampling converter, postfiltered, and then

amplified by a programmable gain stage.

The output buffer can drive a handset ear-piece or an external audio amplifier, an additional

output driver for external loud speaker is implemented.

In the transmit direction the differential microphone signal is fed into a programmable gain

amplifier. The prefiltered and A-to-D converted voice signal forms a 2 Mbit/s data stream. The

oversampled voice signal passes a digital decimation filter.

The E-GOLDvoice performs speech and channel encoding (including voice activity

detection (VAD) and discontinuous transmission (DTX)) and digital GMSK modulation. In the

RF transceiver part, the baseband signal modulates the RF carrier at the desired frequency in

the 850 MHz, 900 MHz, 1.8 GHz, and 1.9 GHz bands using an I/Q modulator. The

E-GOLDvoice supports dual band applications. Finally, an RF power module amplifies the RF

transmit signal at the required power level. Using software, the E-GOLDvoice controls the

gain of the power amplifier by predefined ramping curves (16 words, 11 bits).

For baseband operation, the E-GOLDvoice supports:

• Making or receiving a voice call

• Sending or receiving an SMS.

3.1.4 PMU Details

The E-GOLDvoice includes battery charger support (various sensor connections for

temperature, battery technology, voltage, etc.) and a ringer buffer. E-GOLDvoice avoids the

need for an external power management component because its internal power management

unit contains:

• Voltage regulators for the On-chip and Off-chip functional blocks

• Charger circuitry for NiCd, NiMh and LiIon cells.

3.1.5 Bus Concept

The E-GOLDvoice has two cores (a microcontroller and a DSP), each with its own bus.

16

There is an interconnection between the TEAKlite bus and the C166S X-Bus.

3.1.6 C166S Buses

The C166S is connected to three buses:

1. Local Memory (LM) bus

2. X-Bus

3. PD-Bus.

3.1.7 TEAKLite Bus

The TEAKlite is connected to the TEAKlite bus.

3.1.8 Bus Interconnections

The interconnection between the X-Bus and the TEAKlite Bus uses:

• Multicore Synchronization

• Shared Memory.

3.1.9 Clock Concept

The E-GOLDvoice has a flexible clock control.

3.1.10 Interrupt Concept

The C166 MCU carries out the E-GOLDvoice interrupt system.

3.1.11 Debug Concept

The E-GOLDvoice includes a multi-core debug. The C166 and TEAKlite cores can be

debugged in parallel with:

• A single JTAG port (that is, on a single host)

• Mutual breakpoint control.

3.1.12 C166 Debug Concept

The debugging of the C166 uses the OCDS and the Cerberus.

3.1.13 TEAKLite Debug Concept

TEAKlite debugging uses the OCEM and the SEIB.

3.1.14 Power Management

The E-GOLDvoice provides the power management unit (PMU) for the complete mobile

phone application. The integrated PMU is directly connected to the battery and provides a set

of linear voltage regulators (LDO’s). These LDO’s generate all required supply voltages and

currents needed in a low feature mobile phone.

A charger control circuit charges NiCd, NiMH and LiIon batteries. The charger control

supports hardware controlled pre-charging and software controlled charging. It offers a wide

charger voltage range, making halfwave/ full-wave charging with cheap transformers possible.

White/blue backlight generation is supported with a special driver for very a low external parts

count.

Power consumption during operation phases is minimized due to flexible clock switching

In the Standby Mode most parts of the device are switched off, only a small part is running at

32kHz and the controller RAM is switched to a power saving mode. The TEAKLite ROM can

17

be switched off during Standby via SW.

3.1.15 On-Chip Security Concept

Secure boot is based on a public/private key approach. Flash images that are not signed with

the private key during phone manufacture cannot be loaded. Verification of the Flash code is

done with the public key. The public key as well as hash and verify algorithms are stored in

the ROM, which ensures a hardware secured boot procedure.

The following security features are supported:

• Prevention of illegal Flash programming

• Flash programming makes use of the E-GOLDvoice ID for personalization checks with IMEI

and SIM-lock protection

The security features use the following mechanism:

• Boot ROM flow:

– Controls the boot transition to external flash

– Controls the flash update

• Flash tied to the individual chip via an ID using e-fuses, that is, each E-GOLDvoice chip has

its own fused ID.

Further details on the E-GOLDvoice security concept are not publicly documented.

3.1.16 Asynchronous Operation Mode Concept

The E-GOLDvoice can operate in either:

• The traditional synchronous mode with the 26 MHz system clock synchronized on the base

station

• A special asynchronous mode (XO concept).

In the asynchronous mode the 26 MHz clock input is not synchronized with the base station;

the residual

frequency offset is compensated in the digital signal processing domain. This processing

includes frequency

and timing compensation of the baseband and voiceband signals.

18

3.2 Power Amplifier Module(SKY77518/ SKY77517)

Figure.3-2-1 SKY77518 FUNCTIONAL BLOCK DIAGRAM

The SKY77518 is a transmit and receive front-end module (FEM) with Integrated Power Amplifier

Control (iPAC™) for dual-band cellular handsets comprising GSM900 and DCS1800 operation.

Designed in a low profile, compact form factor, the SKY77518 offers a complete Transmit VCO-to-

Antenna and Antenna-to-Receive SAW filter solution. The FEM also supports Class 12 General Packet

Radio Service (GPRS) multi-slot operation.

The module consists of a GSM900 PA block and a DCS1800 PA block, impedance-matching circuitry for

50 Ω input and output impedances, TX harmonics filtering, high linearity and low insertion loss PHEMT

RF switches, diplexer and a Power Amplifier Control (PAC) block with internal current sense resistor. A

custom BiCMOS integrated circuit provides the internal PAC function and decoder circuitry to control the

RF switches. The two Heterojunction Bipolar Transistor (HBT) PA blocks are fabricated onto a single

Gallium Arsenide (GaAs) die. One PA block supports the GSM900 band and the other PA block supports

the DCS1800 band. Both PA blocks share common power supply pads to distribute current. The output of

each PA block and the outputs to the two receive pads are connected to the antenna pad through PHEMT RF

switches and a diplexer. The GaAs die, PHEMT die, Silicon (Si) die and passive components are mounted

on a multi-layer laminate substrate. The assembly is encapsulated with plastic overmold. Band selection and

control of transmit and receive modes are performed using two external control pads. Refer to the functional

block diagram in Figure.3-2-1

below. The band select pad (BS) selects between GSM and DCS modes of

19

operation. The transmit enable (TX_EN) pad controls receive or transmit mode of the respective RF switch

(TX = logic 1). Proper timing between transmit enable (TX_EN) and Analog Power Control (VRAMP)

allows for high isolation between the antenna and TXVCO while the VCO is being tuned prior to the

transmit burst.

The SKY77518 is compatible with logic levels from 1.2 V to VCC for BS and TX_EN pads,

depending on the level applied to the VLOGIC pad. This feature provides additional flexibility for the

designer in the selection of FEM interface control logic.

Figure.3-2-2 SKY77517 FUNCTIONAL BLOCK DIAGRAM

The SKY77517–21 is a transmit and receive front-end module (FEM) with Integrated Power Amplifier

Control (iPAC.) for dual-band cellular handsets comprising GSM850 and PCS1900 operation. Designed in a

low profile, compact form factor, the SKY77517–21 offers a complete Transmit VCO-to-Antenna and

Antenna-to-Receive SAW filter solution. The FEM also supports Class 12 General Packet Radio Service

(GPRS) multi-slot operation.

The module consists of a GSM850 PA block and a PCS1900 PA block, impedance-matching

circuitry for 50 Ω input and output impedances, TX harmonics filtering, high linearity and low insertion

loss PHEMT RF switches, diplexer and a Power Amplifier Control (PAC) block with internal current sense

resistor. A custom BiCMOS integrated circuit provides the internal PAC function and decoder circuitry to

control the RF switches. The two Heterojunction Bipolar Transistor (HBT) PA blocks are fabricated onto a

single Gallium Arsenide (GaAs) die. One PA block supports the GSM850 band and the other PA block

20

supports the PCS1900 band. Both PA blocks share common power supply pads to distribute current. The

output of each PA block

and the outputs to the two receive pads are connected to the antenna pad through PHEMT RF switches and a

diplexer. The GaAs die, PHEMT die, Silicon (Si) die and passive components are mounted on a multi-layer

laminate substrate. The assembly is encapsulated with plastic overmold.

Band selection and control of transmit and receive modes are performed using two external control pads.

Refer to the functional block diagram in Figure.3-2-2 below. The band select pad (BS) selects between GSM

and PCS modes of operation. The transmit enable (TX_EN) pad controls receive or transmit mode of the

respective RF switch (TX = logic 1). Proper timing between transmit enable (TX_EN) and Analog Power

Control (VRAMP) allows for high isolation between the antenna and TX-VCO while the VCO is being

tuned prior to the transmit burst.

The SKY77517 is compatible with logic levels from 1.2 V to VCC for BS and TX_EN pads, depending on

the level applied to the VLOGIC pad. This feature provides additional flexibility for the designer in the

selection of FEM interface control logic.

21

3.3 26MHz Clock (DCXO)

Figure.3

Figure.3----3

Figure.3Figure.3

The XO_TUNE register holds the digital correction value for the crystal oscillator frequency. The

XOMODE bits of XO_INIT1 register contain setup informations for the crystal oscillator (for example,

current programming, etc.).See Figu

The registers XO_INIT2 and XO_INIT3 contain the coefficients information for the linearization unit of

crystal oscillator (LUXO) This linearization unit computes the required digital control word out of the

programmed AFC bits in order to have a linear pulling curve ppm vs. AFC word. The resulting digital

control word DIG is filtered by a digital lowpass filter, which can be scaled or deactivated using the bits

DIGFILT0 and DIGFILT1 of the XO_INIT3 register.

The frequency correction splits into 2 parts:

1. The XOCAL bits in the XO_INIT1 register are used for the coarse frequency adjustment and are set once

for a mobile lifetime (during production test)

2. The XO_TUNE register contains the information for frequency correction when the mobile is used

(correction of temperature drift, crystal aging)

3 Crystal Oscillato

Crystal Oscillator Functional Overview

3 3

Crystal OscillatoCrystal Oscillato

Figure

re .3

FiguFigu

.3----3333 Crystal Oscillator Functional Overview

re re

.3.3

r Functional Overview

r Functional Overviewr Functional Overview

Crystal Oscillator Functional Overview.

Crystal Oscillator Functional Overview Crystal Oscillator Functional Overview

22

3.4 RTC (32.768KHz Crystal)

Figure.3-4 E-GoldVoice RTC Interface

23

3.5 LCD Interface

Figure.3-5-1 LCD Interface

Figure.3-5-2 Charging PUMP Interface

24

3.6 SIM Card Interface

Figure.3-6 SIM CARD Interface

25

3.7 KEYPAD Interface

Figure.3-7 KEY MAXTRIX Interface

26

3.8 Battery Charging Block Interface

Figure.3-8 Charging IC Interface

27

3.9 RF Interface

Figure.3-9 RF Module/SAW Filter Interface

28

29

3.10 Audio Interface

Figure.3-10-1 Audio Interface

30