Ericsson LPE-200

SCHEMATIC DIAGRAM

Receiver Front End

(1911-ROA 117 2297, Sheet 5, Rev. B)

AE/LZB 119 1902 R1A

Contents

Main AE/LZB 119 1902 R1A TABLE OF CONTENTS SPECIFICATIONS* GENERAL SPECIFICATIONS RECEIVE TRANSMIT DESCRIPTION MECHANICAL OPTIONS AND ACCESSORIES OPERATION CONTROLS AE/LZB 119 1902 R1A KEYPAD SCAN/SYSTEM FUNCTIONS Key Function M Key Function A/D SCN OPT 1-9, *, 0, # CIRCUIT ANALYSIS SOFTWARE RECEIVER RX Front End AE/LZB 119 1902 R1A Rx Back End Page TRANSMITTER Transmit Frequency Generation TX/Converter/Modulator (N150) SAW Transmit Band Pass Filter 1 MMIC Buffer Amplifier SAW Transmit Band Pass Filter 2 Power Amplifier (N101) Directional Coupler (W100) Power Control Buffer (N102-B) Transmit Low-Pass Filter/Antenna Switch Transmit Modulation SYNTHESIZER Dual Synthesizers (N203) Bilateral Switch (N201) Main Synthesizer (N203) Auxiliary Synthesizer (N203) Reference Oscillator (U201) DC POWER DISTRIBUTION Synthesizer Regulator (N290) Tx Switch (V192) B+ Switch (V191) Analog Regulator (N900) +5V-D Switching Regulator (N902) LCD NEGATIVE BIAS GENERATOR SERVICE NOTE EQUIPMENT REQUIRED Equipment Description Part Number PROGRAMMING Personality Programming AE/LZB 119 1902 R1A Flash Programming Programming Mode BASIC TROUBLESHOOTING Symptom Possible Cause/Action Required Page Page Non-Fatal Errors Special Error Codes ERROR CODES - SPECIFIC Hardware Fatal System Errors Operational Software Fatal System Errors Operational Software Non-Fatal System Errors Radio Programming Errors Page DISASSEMBLY PROCEDURE F NOTE PA Module Replacement Filters Z400 And Z401 Replacement REASSEMBLY Radio, 900 MHz LPE-200 Radio 900 MHz Front Assembly SCAN Front Assembly (Scan) SXK 107 3807* Front Assembly SYSTEM Front Assembly (System) SXK 107 3808* Radio Rear Assembly Rear Assembly SXK 107 3815 900 MHz Main Circuit Board Assembly 900 MHz Main Board Assembly ROA 117 2297