Descripcion y Funcionamiento de un Celular GSM SONY

Diagramas
Diagrama en Bloques del Sistema de RF

VCC_RF LDO

RF_EN

Rx frontend Rx interstage filter

VCC_SYNTH LDO
filter LNA 1st Rx mixer
DCS IF
RF IF SAW RXIP
Filter IF Amplifier I
Ceramic Filter SAW Filter 440 MHz (PGC) RXIN
LO
1805..1880 1805..1880 90° BB amplifier RXQP
MHz MHz  0
and low pass
° RXQN
GSM LNA filter
Q
RF IF
RX: AFC
SAW Filter SAW Filter
GSM 1365..1400 VCTCXO
LO MHz
925..960 925..960 13 MHz CLK13M
MHz MHz 440
MHz
LO1 (RF) PLL:
RX - RX -
Antenna 1
LO1 (RF) PLL
GSM 1365..1400 N
2 MHz N+1 200 kHz
LNA Bias
Transceive DCS 1365..1440 Total VCO step1
control

880 MHz
MHz
r - TX -
Range: 1365
Antenn to 1460 MHz

N
GSM 1370..1440
a
1
LO1 Loop

VCO Filter

TX:
RF Connector GSM 1370..1440
MHz PLL
with
TX
LO2 (IF)
PLL RX


N
880 MHz
Detector
2 1
APC loop and Level
control
DCS
GSM LO2 Loop
1
VCO Filter
M
5 LO2 (IF) PLL
TX: 975 MHz 1 Total VCO 1 1 MHz step
GSM Tx GSM VCO GSM 685..720 MHz
Pin diode Range: 880 to
880..915 MHz 880..915 DCS 1385..1460 975 MHz
switch MHz 3/5
GSM :5
1 DCS :3
Directional PA LP Filter
coupler + SERCK
LPF Down LP Filter
Converte SERDA
DCS1800 Pin diode Tx DCS VCO SERLE1
1710..1785 MHz 1710..1785
SERLE2
switch MHz Loop Sum
Filter
loop I

Directiona PA LP Filter
 90° TXIP
l  0
Phase
° TXIN
detecto
r TXQP
GSM 195 MHz Q
TXQN
DCS 325 MHz

DET_EN
IC 1 Digital
signal
DET_TX TX_SW_EN GSM_TX_EN GSM_VCO_EN RF_IC_EN
s TXP_OFS_EN APC_DOWN DCS_TX_EN DCS_VCO_EN

IC 2 Analog
signals AUX_DAC TXP

6.1.1 General RF Indications

The radio part of the CMD-J5/J16 handles the air interface according to the GSM specifications.
It is the main contributor for the dualband functionality for E-GSM 900 and DCS 1800.
Receiver
The receiver consists of two separated RF paths for GSM and DCS 1800 each.
On the transmission line between the antenna switch of the RF part and the antenna there is the RF
connector including a mechanical switch to connect an external antenna for accessory use. The
integrated mechanical switch switches between the helix antenna and the external RF antenna
connection. As long as a plug is connected the antenna is deactivated and all RF signals go across
the connector.
The GMSK (Gaussian-filtered minimum shift keying) modulated 900 MHz / 1800 MHz signal received
by the antenna is filtered, gained and downconverted into the baseband via an intermediate
frequency of 440 MHz.
The 440 MHz filter is followed by a tuneable amplifier and IQ demodulator. Behind the demodulator
there are additional base band amplifiers and low pass filters.
The In Phase (I) and Quadrature (Q) signal outputs are balanced each.
A 13 MHz voltage-controlled-temperature-compensated crystal oscillator (VCTCXO) generates the
clock frequency for the PLL and baseband part.

Transmitter
In the transmit direction the digitally GMSK-modulated baseband signal is upconverted to the
transmit frequency in the 900 MHz / 1800 MHz band via an intermediate frequency of 195 MHz
(GSM) / 325 MHz (DCS 1800) by means of an IQ modulator and the subsequenting sum loop.
All RF and IQ signals are balanced signals in order to suppress crosstalk effects. According to GSM
recommendations transmitter and receiver are never active at the same time.

1
(TDMA system “Time Division Multiple Access”).

2
6.2 Block Diagram - Baseband

KEY-LED
MCP-I/F BL-I/F
FLASH/SRAM LCD-LED
KEY-I/F
LCD-I/F
KEY-MATRIX

FLEX-BOARD
LCD
SLIDE-SW
(REC/LOCK
KEYBOARD or Manner)
IC 1
I/O CONNECTOR
JOG DIAL
1 DGND
2 CHG JOG
3 GEN I/O
MODEM-I/F JOG-I/F
Multiacto
4 POWER OUT
r
5 RX (IN) TIME
RINGER *Ringer
6 TX (OUT) PROCCESSING
AUDIO *Vibrato
UNIT
AMP r
7 ACC ID
8 RTS *Loud-
RTC 32kHz HEADSET
9 CTS CLK- RF-I/F AUDIO &
CTRL HEADPHONE-JACK
10 AUDIO OUT REMOTE
11 AUDIO IN SIM
12 AGND Interfac
IC 2
e
I/F MIC

Battery IC 1
Connector I/F
Power / CHG
Management
AUDIO EAR
LI-ION AMP RECEIVER
BATTERY SIM I/F AUDIO
I/F
HFK I/F
RTC / ID IC 2 MIC

SIM SIM LEVEL

CTRL 3V/5V
Connector
A/D CONV RF I/F A/D,
SIM CARD D/A

RF TCXO
BLOCK

6.2.1 General Baseband Indications

The Baseband part consists of two chips, a digital chip IC 1 and an analog one IC 2.
The CMD-J5/J16 external memory size is 32 Mbits Flash ROM and 4 Mbit SRAM.
IC 1
The application of IC 1 is the management of the GSM baseband processes through the GSM layer 1,
2 and 3 protocols as described in the ETSI standard with a specific attention to the power
consumption in both GSM dedicated and idle modes.

It is a chip that implements:

 the digital baseband processes of the CMD-J5/J16 and combines a Digital Signal Processing (DSP)
with its program and data memories,
 a Micro-Controller core with emulation facilities and an internal RAM memory,
 a clock squarer cell,
 several compiled ports and equivalent CMOS gates.

Full support for Full-Rate, Enhanced Full-Rate and Half-Rate speech coding is given.

3
IC 2
IC 2 is the platform of the A/D-D/A converter for the interfacing and processing of baseband I/Q signals
and voice signals.

It includes:
 the complete set of baseband functions to perform the interface and processing of voice signals,
 interface for processing of baseband components as In Phase (I) and Quadrature (Q) signals
which support single slot and multi slot mode,
 associated auxiliary RF control features,
 supply voltage regulation,
 battery charging control and
 switch ON/OFF system analysis.

Further, IC 2 includes also on chip voltage reference, under voltage detection and power -on reset
circuits.
IC 2 interfaces with the digital baseband device through a set of digital interfaces dedicated to the
main functions of IC 1:
1. A baseband serial port (BSP) and a voiceband serial port (VSP) to communicate with the DSP.
2. A micro- controller serial port (USP) to communicate with the micro contoller core of IC 1.
3. A time serial port (TSP) to communicate with the processing unit for real time control.

6.3 Block Diagram - Audio

IC 1

IC 2

6.3.1 General Audio Indications

Multiactor (Loudspeaker /Ringer Vibrator)
This device is a combined electrodynamic vibration exciter with an additional membrane to improve
frequency response and enhance ringer level.
The system is tuned to the vibration frequency around 130 Hz.

Headset Connector (Headphone Jack)

The headset is connected directly to the circuit to the built in microphone and earpiece. The
connector is a 4-pole jack with 2 switches.

4
 SECTION 7
SPARE PARTS AND ACCESSORIES LIST
Note:
 The parts with no reference in the exploded view are not supplied.

Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
1 A-3649-251-A CABINET, UPPER SUB-ASSY ACCESSORIES & PACKING MATERIALS
(HONG KONG/PHILIPPINE) *************************************************
1 A-3649-263-A CABINET, UPPER SUB-ASSY
(MALAYSIA) 1-476-203- AC ADAPTOR EU QN-3AC1
1 A-3649-313-A CABINET, UPPER SUB-ASSY (MALAYSIA)
11
(TAIWAN)
1-476-204- AC ADAPTOR UK QN-3AC2
2 1-542-441-21 MICROPHONE
11 (HONG KONG)
3 A-3649-063-A RECEIVER ASSY
1-476-206-12 AC ADAPTER (CABLE) QN-3TC
(TAIWAN/PHILIPPINE)
4 3-045-009-01 RUBBER KEY
1-757-783- AC POWER-SUPPLY CORD SET
5 A-3622-451-A LCD ASSY
6 1-794-665-11 CONNECTOR HOUSING 11 (TAIWAN)
7 1-793-605-22 SIM CONNECTOR CORD SET, POWER (PHILIPPINE)
1-823-596-
8 A-3622-453-A FLEX MOUNT
11
9 3-225-215-01 PLATE, JACK 3-221-976- MANUAL, INSTRUCTION
10 1-418-426-21 ROTARY ENCODER 21
11 1-529-799-21 MULTIACTOR (CHINESE, TRADITIONAL) (HONG KONG)
12 A-3649-053-B CABINET, LOWER SUB-ASSY 3-221-976- MANUAL, INSTRUCTION
13 1-754-151-41 HELICAL ANTENNA 81 (TAIWANESE) (TAIWAN)
MANUAL, INSTRUCTION
14 3-225-211-01 CAP, RF 3-221-976-
15 1-756-116-21 BATTERY PACK, 640 91
16 3-929-548-01 SCREW (1.7x6), +PTT (ENGLISH) (MALAYSIA)
17 3-224-788-01 SCREW (DIA1.4x4.5), 3-227-528- GAMES LEAFLET
PRECISION 21
18 3-225-214-02 CAP, JACK (MALAYSIA/PHILIPPINE)
3-227-791- GAMES LEAFLET
19 3-225-210-01 BADGE, PRINTING (CMD-J5) 21 (HONG KONG, TAIWAN)
19 3-225-210-21 BADGE, PRINTING (CMD-J16)
3-232-948- LIST, CHARACTOR CORRESPOND
01 (TAIWAN)
3-236-212-11 MANUAL, INSTRUCTION (ENGLISH)
(PHILIPPINE)

5
(Hongkong/
Malaysia/ Sony Corporation © 2001.3
Taiwan/Philippine) Digital Telecommunications Network Company Published by Quality Assurance
9-873-704-24 Dept.