Ericsson LPE-200 manual Receiver Front End

Page 42

AE/LZB 119 1902 R1A

SCHEMATIC DIAGRAM

 

 

Receiver Front End

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

42

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Contents Maintenance Manual DEC Original issue AE/LZB 119 1902 R1ATable of Contents Error Codes Specific GeneralReceive TransmitDescription Options and Accessories MechanicalOperation ControlsKeypad SCAN/SYSTEM Functions SCNOPT Receiver Circuit AnalysisSoftware RX Front EndRx Back End Digital I/O Lines Phase Digitizer D701Audio Power Amplifier N600 DSP ModuleTransmitter Transmit Frequency GenerationTX/Converter/Modulator N150 SAW Transmit Band Pass Filter Power Amplifier N101Power Sensor Circuit N102-A Directional Coupler W100Synthesizer DC Power Distribution +5V-D Switching Regulator N902 Tx Switch+ Switch Analog Regulator N900Equipment Required ServiceLCD Negative Bias Generator ProgrammingProgramming Mode Basic TroubleshootingFlash Programming Symptom Possible Cause/Action Required General TroubleshootingTransmit Path Test Points and Levels Error Code Format Error Codes IntroductionError Code Overview Fatal ErrorsError Codes Specific Non-Fatal ErrorsSpecial Error Codes Hardware Fatal System ErrorsOperational Software Fatal System Errors Operational Software Non-Fatal System Errors Radio Programming Errors Radio Errors That Are Returned From The Bootloader SoftwareMessage Code Description AE/LZB 119 1902 R1A Disassembly Procedure To disassemble the LPE-200 radioPush Battery Contacts PA Module Replacement Filters Z400 And Z401 ReplacementReassembly Assembly Diagram and Parts List Radio, 900 MHzFront Assembly Scan Front Assembly Scan SXK 107Front Assembly System Radio Rear Assembly Rear Assembly SXK 107MHz Main Circuit Board Assembly ROA 117Front Side MHz Circuit BoardBack Side Block Diagram Transmitter Transmit Offset Synthesizer Receiver Front End Receiver Back End RF Regulators Digital I/O Lines to RF Section Analog I/O Lines to RF Section TX/RX Audio ROA 117 2297, Sheet 11, Rev. B Flex Connector DSP Connectors System Memory Regulators/Power Switch LCD Bias, LED Driver, UDC SWA+ OUT Debbie D601 Hillary D701 Ericsson Inc
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