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File name Manual_L25e_M55_V10.pdf

M55 Level 2.5e Repair Documentation V 1.00 Version V 1.00 Date May 2003 Department ICM MP CCQ GRM Notes to change New document V1.10 M55 Page 1 of 49 Company Confidential © Copyright Siemens AG ICM MP CCQ GRM 01/03 Table of Contents: 1 2 3 4 4.1 4.2 LIST OF AVAILABLE LEVEL 2,5E PARTS M55... 4 REQUIRED EQUIPMENT FOR LEVEL 2,5E ... 5 REQUIRED SOFTWARE FOR LEVEL 2,5E M55 ... 5 RADIO PART ... 6 Power Supply RF-Part ... 7 Frequency generation ... 8 Synthesizer: The discrete VCXO (26MHz)...8 Synthesizer: LO1 ...10 Synthesizer: LO2 ...12 Synthesizer: PLL ...13 4.2.1 4.2.2 4.2.3 4.2.4 4.3 4.4 Antenna switch (electrical/mechanical)... 14 Receiver... 17 Receiver: EGSM900/GSM1800/GSM1900 ­Filter to Demodulator ...17 IC Overview ...19 4.4.1 4.4.2 4.5 Transmitter... 20 Transmitter: Modulator and Up-conversion Loop...20 Transmitter: Power Amplifier ...21 4.5.1 4.5.2 5 LOGIC / CONTROL... 22 5.1 Overview of Hardware Structure ... 22 5.1.1 Logic Block Diagram ...22 5.1.2 Block Diagram M55 Control Part...22 5.1.3 EGOLD+ ...23 5.1.4 SRAM ...27 5.1.5 FL