Service Manuals, User Guides, Schematic Diagrams or docs for : Sony Ericsson Mobile Phones Сотовый телефон Sony Ericsson T230 & T290 SONY ERICSSON T230, T290 1
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1 (34)
OPERATIONAL DESCRIPTION
CONFIDENTIAL
Prepared (also subject responsible if other) No.
SEM/CA/PT/ Bryan Thornton 1551-KRH 101 297
Approved Checked Date Rev Reference
SEM/CA/PT/ 16 Nov 2004 A
Description of Operation
Dual Band GSM Transceiver Unit
TABLE OF CONTENTS
1 Revision History .............................................................3
2 General...........................................................................3
3 Transceiver Overview.....................................................4
3.1 Mechanical construction .................................................5
3.2 RF parts..........................................................................5
3.2.1 GSM 900 ........................................................................5
3.2.2 DCS 1800.......................................................................5
3.2.3 Frequency generation ....................................................5
3.2.4 Receiver .........................................................................7
3.2.5 Transmitter .....................................................................7
3.3 Logic/audio part..............................................................7
3.3.1 Functions........................................................................7
4 Antenna ..........................................................................8
5 External connectors........................................................8
6 Battery ............................................................................9
7 Detailed Description of Radio Circuits ............................9
7.1 CROSS REFERENCES .................................................9
7.1.1 Names ............................................................................9
7.1.2 Abbreviations................................................................10
7.2 OVERVIEW ..................................................................11
7.2.1 The TX PATH ...............................................................11
7.2.2 The RX PATH...............................................................12
7.3 Frequency plan.............................................................13
7.4 THE RADIO BLOCKS: .................................................14
7.4.1 The antenna switch ......................................................14
7.4.2 The Receiver ................................................................15
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Limited Internal
DESCRIPTION
Prepared (also subject responsible if other)
No.
SEM/CA/PT Bryan Thornton 1551-KRH 101 297
Approved Checked Date Rev Reference
SEM/CA/PTC 16 Nov 2004 A
7.4.3 The transmitter: ............................................................17
7.4.4 Power amplifier & Power control block: ........................21
7.4.5 The Voltage Controlled X-tal Oscillator (VCXO):..........22
7.4.6 Power Management .....................................................22
7.5 PRINTED CIRCUIT BOARD ........................................22
8 Detailed Description of Baseband Circuits ...................23
8.1 Names ..........................................................................23
8.2 Abbreviations................................................................24
8.3 DATA FLOW ................................................................25
8.3.1 TX path.........................................................................26
8.3.2 RX path ........................................................................26
8.4 DESCRIPTION OF BASEBAND FUNCTIONS ............27
8.4.1 ON/OFF circuitry ..........................................................27
8.4.2 Polyphonic ring signals.................................................29
8.4.3 Audio ............................................................................29
8.4.4 Keyboard Scanning ......................................................30
8.4.5 Keyboard and Display Illumination ...............................30
8.4.6 LCD Voltage Regulation ...............................................30
8.4.7 Real Time Clock ...........................................................30
8.5 Memory configuration...................................................31
8.5.1 MARTHA memory ........................................................31
8.5.2 Programming................................................................32
9 Appendix A: Accessories.............................................33
3 (34)
Limited Internal
DESCRIPTION
Prepared (also subject responsible if other)
No.
SEM/CA/PT Bryan Thornton 1551-KRH 101 297
Approved Checked Date Rev Reference
SEM/CA/PTC 16 Nov 2004 A
1 Revision History
REV DATE PERSON CHANGES
PA1 1May03 R Williams Adapted from T306 1551
A 16 Nov 04 B Thornton Reviewed and updated
2 General
This document provides a general description for the T290i and T290c Sony
Ericsson mobile phone.
The T290i/T290c mobile phone is in the Sony Ericsson AAA-1001013-BV and
AAA-10001013-CN family, respectively. It is a class 41 handheld dual band
(EGSM 900 and DCS1800) cellular phone, designed to be compatible with all
mandatory GSM phase 2 recommendations. Handover is supported between
the EGSM 900 and DCS 1800 bands.
A connector at the bottom of the phone makes it possible to connect various
accessories like chargers and hands-free units. The supported accessories
are listed in appendix A.
The T290i/T290c supports the following systems and features:
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