Descripcion y Funcionamiento de un Celular GSM SONY Diagramas Diagrama en Bloques del Sistema de RF VCC_RF
LDO
VCC_SYNTH
LDO
RF_EN Rx frontend filter DCS
Rx interstage filter 1st Rx mixer
LNA
RF
Ceramic Filter 1805..1880 MHz
IF
SAW Filter 1805..1880 MHz
IQ Demodulator
IF SAW Filter 440 MHz
IF Amplifier (PGC)
RXIN BB amplifier and low pass filter
90°
∑
0 °
LNA
GSM
RXIP
I
LO
RXQP RXQN
Q RF
IF
SAW Filter 925..960 MHz
SAW Filter 925..960 MHz
LO
RX: GSM 1365..1400 MHz DCS 1365..1440 MHz
AFC
VCTCXO
CLK13M
13 MHz
440 MHz RX
LO1 (RF) PLL: - RX GSM 1365..1400 MHz DCS 1365..1440 MHz - TX GSM 1370..1440 MHz DCS 1385..1460 MHz
1
LNA Bias control
2
Transceiver
880 MHz
Antenna
Antenna Switch
LO2 (IF) PLL RX 880 MHz TX 975 MHz 1
GSM 880..915 MHz
5 1
3/5 1 Directional coupler + LPF
Down Converter
DCS1800 1710..1785 MHz
Pin diode switch
LP Filter
IC 2
DET_EN DET_TX TXP_OFS_EN
Analog signals
AUX_DAC
LO2 (IF) PLL 1 MHz step
SERCK SERDA SERLE2
Sum loop I
ϕ ∑
Phase detector
Digital signals
1
GSM :5 DCS :3
LP Filter
TX_SW_EN
GSM_TX_EN
GSM_VCO_EN
APC_DOWN
DCS_TX_EN
DCS_VCO_EN
TXIP
90° 0 °
TXIN TXQP
GSM 195 MHz DCS 325 MHz
IC 1
M
N 1
SERLE1
Tx DCS VCO 1710..1785 MHz Loop Filter
PA
Loop Filter
Total VCO Range: 880 to 975 MHz
LP Filter
PA
Directional coupler
LO2 VCO
GSM
TX: GSM 685..720 MHz DCS 1385..1460 MHz
Tx GSM VCO 880..915 MHz
Pin diode switch
ϕ
2
DCS
1
PLL
TX
Detector and Level control
N
Loop Filter
TX: GSM 1370..1440 MHz DCS 1385..1460 MHz
975 MHz
APC loop
1
ϕ LO1 VCO
RF Connector with mechanical switch
LO1 (RF) PLL 200 kHz step
N N+1
Total VCO Range: 1365 to 1460 MHz
Q
TXQN
RF_IC_EN
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. (TDMA system “Time Division Multiple Access”).
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6.2 Block Diagram - Baseband
KEY-LED
BL-I/F
MCP-I/F
FLASH/SRAM
LCD-LED
KEY-I/F
LCD-I/F
KEY-MATRIX FLEX-BOARD
LCD
IC 1
I/O CONNECTOR DGND
2 3 4 5 6
CHG GEN I/O POWER OUT RX (IN) TX (OUT)
7 8 9
ACC ID RTS CTS
RTC
10 AUDIO OUT 11 AUDIO IN 12 AGND
SIM Interface
MODEM-I/F
Power / CHG Management SIM I/F
RTC / ID
HFK I/F
JOG
JOG-I/F
TIME PROCCESSING UNIT
LI-ION BATTERY
SIM Connector
SLIDE-SW (REC/LOCK or Manner)
JOG DIAL
1
Battery Connector
KEYBOARD
Multiactor RINGER
AUDIO AMP 32kHz CLKCTRL
HEADSET AUDIO & REMOTE
RF-I/F
IC 2 I/F
*Ringer *Vibrator *LoudSpeaker HEADPHONE-JACK
MIC
IC 1 I/F AUDIO AMP AUDIO I/F
IC 2
EAR RECEIVER
MIC
SIM LEVEL CTRL 3V/5V A/D CONV
RF I/F
A/D, D/A
SIM CARD
RF BLOCK
TCXO
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: 他 the digital baseband processes of the CMD-J5/J16 and combines a Digital Signal Processing (DSP) with its program and data memories, 他 a Micro-Controller core with emulation facilities and an internal RAM memory, 他 a clock squarer cell, 他 several compiled ports and equivalent CMOS gates. Full support for Full-Rate, Enhanced Full-Rate and Half-Rate speech coding is given.
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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: ¾ the complete set of baseband functions to perform the interface and processing of voice signals, ¾ interface for processing of baseband components as In Phase (I) and Quadrature (Q) signals which support single slot and multi slot mode, ¾ associated auxiliary RF control features, ¾ supply voltage regulation, ¾ battery charging control and ¾ 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.
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SECTION 7 SPARE PARTS AND ACCESSORIES LIST Note: • The parts with no reference in the exploded view are not supplied.
Ref. No. 1
Part No.
Description
Remark
2 3
A-3649-251-A CABINET, UPPER SUB-ASSY (HONG KONG/PHILIPPINE) A-3649-263-A CABINET, UPPER SUB-ASSY (MALAYSIA) A-3649-313-A CABINET, UPPER SUB-ASSY (TAIWAN) 1-542-441-21 MICROPHONE A-3649-063-A RECEIVER ASSY
4 5 6 7 8
3-045-009-01 A-3622-451-A 1-794-665-11 1-793-605-22 A-3622-453-A
RUBBER KEY LCD ASSY CONNECTOR HOUSING SIM CONNECTOR FLEX MOUNT
9 10 11 12 13
3-225-215-01 1-418-426-21 1-529-799-21 A-3649-053-B 1-754-151-41
PLATE, JACK ROTARY ENCODER MULTIACTOR CABINET, LOWER SUB-ASSY HELICAL ANTENNA
14 15 16 17 18
3-225-211-01 1-756-116-21 3-929-548-01 3-224-788-01 3-225-214-02
CAP, RF BATTERY PACK, 640 SCREW (1.7x6), +PTT SCREW (DIA1.4x4.5), PRECISION CAP, JACK
19 19
3-225-210-01 3-225-210-21
BADGE, PRINTING (CMD-J5) BADGE, PRINTING (CMD-J16)
1 1
(Hongkong/Malaysia/ Taiwan/Philippine) 9-873-704-24
Ref. No.
Part No.
Description
Remark
ACCESSORIES & PACKING MATERIALS ************************************************* 1-476-203-11 AC ADAPTOR EU 1-476-204-11 1-476-206-12 1-757-783-11 1-823-596-11
QN-3AC1 (MALAYSIA) AC ADAPTOR UK QN-3AC2 (HONG KONG) AC ADAPTER (CABLE) QN-3TC (TAIWAN/PHILIPPINE) AC POWER-SUPPLY CORD SET (TAIWAN) CORD SET, POWER (PHILIPPINE)
3-221-976-21 MANUAL, INSTRUCTION (CHINESE, TRADITIONAL) (HONG KONG) 3-221-976-81 MANUAL, INSTRUCTION (TAIWANESE) (TAIWAN) 3-221-976-91 MANUAL, INSTRUCTION (ENGLISH) (MALAYSIA) 3-227-528-21 GAMES LEAFLET (MALAYSIA/PHILIPPINE) 3-227-791-21 GAMES LEAFLET (HONG KONG, TAIWAN) 3-232-948-01 LIST, CHARACTOR CORRESPOND (TAIWAN) 3-236-212-11 MANUAL, INSTRUCTION (ENGLISH) (PHILIPPINE)
Sony Corporation Digital Telecommunications Network Company
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© 2001.3
Published by Quality Assurance Dept.