Table Of Contents - Siemens A35 Repair Documentation

Table of Contents:

1
LIST OF LEVEL 2,5E PARTS A35/36 ...................................................................................................... 4
2
REQUIRED EQUIPMENT .......................................................................................................................... 5
3
REQUIRED SOFTWARE............................................................................................................................ 5
4
RADIO PART................................................................................................................................................ 6
4.1 POWER SUPPLY FOR RF PART............................................................................................................. 6
4.2 FREQUENCY GENERATION................................................................................................................... 7
4.2.1 DISCRETE 13MHZ VCXO ................................................................................................................ 7
4.2.2 VCO LO1 .............................................................................................................................................. 8
4.2.3 VCO LO2 .............................................................................................................................................. 9
4.2.4 PLL IC PART OF SMARTI ............................................................................................................ 10
4.3 ANTENNA SWITCH................................................................................................................................. 11
4.4 RECEIVER................................................................................................................................................. 12
4.4.1 RECEIVER GSM 900/1800................................................................................................................ 12
4.4.2 MIXER, IF-AMPLIFIER AND DEMODULATOR ....................................................................... 13
4.4.3 SMARTI IC ........................................................................................................................................ 14
4.5 TRANSMITTER ........................................................................................................................................ 15
4.5.1 MOULATOR AND UP-CONVERSION LOOP................................................................................ 15
4.5.2 POWER AMPLIFIER AND ANTENNA SWITCH.......................................................................... 16
5
POWER SUPPLY ........................................................................................................................................ 17
5.1 OVERVIEW AND VOLTAGES................................................................................................................ 17
5.2 POVER SUPPLY ASIC.............................................................................................................................. 18
6 BATTERY AND CHARGING.................................................................................................................... 24
6.1 BATTERY ................................................................................................................................................... 24
6.2 CHARGING CONCEPT ............................................................................................................................ 24
V1.0
A35-A36-A40
Page 2 of 38
Company Confidential
ICM MP CC ST
09/01