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GSM PHONE
SERVICE MANUAL

MODEL : FT20
Rev. 1.00
Table Of Contents

1. Introduction ........................................................................................................ 1-1

2. Specification ....................................................................................................... 2-1
2.1 HW Features ................................................................................................................................................ 2-1
2.2 SW Features ................................................................................................................................................. 2-2

3. Disassembly Instruction

4. Data Kit & Test Method ................................................................................................................... 4-1
4.1 Data Kit ......................................................................................................................................................... 4-1
4.1.1 Download Equipment ....................................................................................................................... 4-1
4.1.2 Download Procedure ......................................................................................................................... 4-1

4.2 Test Method ................................................................................................................................................. 4-6
4.2.1 Power-On Trouble .............................................................................................................................. 4-6
4.2.2 MIC Trouble ........................................................................................................................................ 4-7
4.2.3 Receiver Trouble ................................................................................................................................. 4-8
4.2.4 Melody Trouble ................................................................................................................................... 4-9
4.2.5 LCD Trouble ...................................................................................................................................... 4-10
4.2.6 Charge Trouble .................................................................................................................................. 4-11
4.2.7 Vibrator Trouble ................................................................................................................................ 4-12
4.2.8 Backlight Trouble & 7-LED Trouble................................................................................................ 4-13
4.2.11 TX Power Trouble (E-GSM) ............................................................................................................. 4-14
4.2.12 TX Power Trouble (DCS) ................................................................................................................ 4-16
4.2.13 Rx Sensitivity Trouble (E-GSM) .................................................................................................... 4-18
4.2.14 Rx Sensitivity Trouble (DCS) ........................................................................................................ 4-21

I
Table of Contets

5. Electrical Parts List ........................................................................................................................... 5-1
5.1 RF Part List .................................................................................................................................................5-1
5.2 BASEBAND Part List .................................................................................................................................5-2

8. Block Diagram ...................................................................................................................................... 8-1
8.1 BB Block Diagram ....................................................................................................................................... 8-1
8.2 RF Block Diagram ....................................................................................................................................... 8-2

9. Schematic Diagram ........................................................................................................................... 9-1

II
1. Introduction

FT20 is a folder type mobile phone operated in the GSM Digital Cellular Mobile Radio System, which is the Pan-
European mobile cellular standard. FT20 has the operation band of GSM 900 and DCS 1800. GSM Phase II
features are fully supported and parts of the GSM Phase II+ features are also supported. About the SIM Toolkit,
FT20 supports up to Class 3 including Class 1, 2. For speech communication, FT20 supports Full Rate(FR),
Enhanced Full Rate(EFR) and Half Rate(HR). For easy text, eZi Text is implemented and WAP protocol is
adopted for internet connection.

1-1
Introduction

Memo

1-2
2. Specification

2.1 HW Features

Item Description Remark

Supporting standard GSM 900/DCS 1800 Dual Band
E-GSM
Phase 2 and Phase 2+
SIM Toolkit : Class 1, 2

Frequency range E-GSM TX : 880 - 915 MHz
E-GSM RX : 925 - 960 MHz
DCS 1800 TX : 1710 - 1785 MHz
DCS 1800 RX : 1805 - 1880 MHz

Battery 1. Capacity
Slim : Li-ion, 580 mAh Standard : Li-ion, 720 mAh

Display Full graphic type
Dual LCD
Main LCD
Pixels : 128 x 128
Ext. LCD
Pixels : 64 x 32

7 Color LED Indicator

Antenna Fixed type

PC synchronization Applied

Speech coding FR, EFR, HR

Data & Fax Built-in

Vibrator Built-in

Dual Speaker Applied (16 pole)

Portable Handsfree (Ear-Phone) Built-in

Travel charger Built-in

Options Ear-Mic

2-1
Specification

2.2 SW Features

Function Detail Item Comments

Normal features Last dialed number 20 entry

Last received number 20 entry

Last missed number 20 entry

Scratch pad memory 1

Call Call waiting Yes(network dependent)

Audio Earpiece volume 5 level

Mute on& Mute off Yes

Cell broadcast CB option On / Off

Read topics SIM / Phone

Languages Same as number of language

Supplementary services Call barring Voice call
Data call
Fax call
Cancel call
Password change

Short Message Write message Send/Store/Temporary Box

Output message Edit/Save/Extract Number/
Delete/Delete All

Input message Reply/Forward/Extract number/
Delete/Delete All

Status report Delete/Delete All

Call voicemail

Cell broadcast Read/CB Channel
Languages/Alert

2-2
Specification

Function Detail Item Comments

Message set

Message set Status report
Expiry period/SMS center
Voice center/Alert

Multi-band Support of multi-band & mode GSM 900
EGSM
DCS1800

Miscellaneous function Development & test facility

Field test facility

Display software version

Text input Language English
Simplified chinese
Traditional chinese

eZi text Predictive word input

Scheduler View day

Make Meet
Birthday
Memo
Anniversary, call

Delete

Find , Setup

World time Setting local time

Number of selectable cities 59 Cities

Calculator Operator Addition
Subtraction
Multiplication
Division

Unit converter Length conversion
Weight conversion
Volumes conversion
Surface conversion, User define

2-3
Specification

Function Detail Item Comments

Monthly Care

Bio Rhythm My Rhythm
Friend's Rhythm
Setup My Birthday

Friend's Birthday

Game 3EA Mahjong/jewelry/0-327

2-4
4.Data Kit & Test Method

4.1 Data Kit

4.1.1 Download Equipment

1. Data kit
2. Desktop or Notebook PC
3. Download monitor program
4. FT20 mobile phone

4.1.2 Download Procedure

DOWNLOAD ENVIRONMENT
To download software of FT20. the following working environments should be
prepared: