Ericsson LBI-39175A manual Description, Transmitter, Receiver

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LBI-39175A

DESCRIPTION

INITIAL MEASUREMENTS

This section contains the information required to service the ORION VHF Dual Bandwidth two-way FM radio. Included are disassembly procedures, alignment procedures, and troubleshooting information (see Table of Contents).

This radio is adjusted by setting personality parameters stored in the radio's computer memory. Therefore, all radio alignment procedures require the use of a Personal Computer (IBM PC or equivalent), along with a Programming Interface TQ3370, and an ORION PC Programming Cable TQ3377. PC Programming Software Version 4.00 or later is also required.

This radio is designed to be serviced by replacement of modules and/or circuit boards. As such, there are very few serviceable component parts contained on any of the circuit boards within the radio. Normally, defective boards should be replaced, and returned to an Authorized Service Center. Any serviceable parts are listed in the troubleshooting guide for the individual circuit boards.

Copyright© December 1995, Ericsson Inc.

After the radio has been installed as described in the Installation Manual, the following measurements should be made by a certified electronics technician, and recorded for future reference:

TRANSMITTER

RF Power into 50 ohm resistive load

Forward Power into antenna

Reflected Power from antenna

Carrier Frequency

Modulation Deviation

RECEIVER

12 dB SINAD Sensitivity from FM signal generator

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Contents Table of Contents LBI-39175AReceiver DescriptionTransmitter Maintenance Checks MaintenancePreventive Maintenance Maintenance Checks IntervalTransceiver Txrx Module Disassembly ProcedureTo Remove the Unit from the Mounting Bracket Control Unit Front MountedTo Re-Assemble Unit after Servicing Front Mount Control Unit O-Ring Lubrication Alignment Procedures IntroductionLBI-39175A Tracking Data Test FrequenciesParameter Limit Setting Tracking DataSituation NEW Tracking Data SinadTo Replace the PA RF Transistors PA Transistor ReplacementTransmitter Alignment Test Equipment Required Adjustment ProceduresReceiver Alignment Microphonics Troubleshooting GuideSquelch Adjustment Serviceable Parts Diagnostic Procedures Typical Orion Test ConfigurationPA PWB Additional Tools RequiredTransmitter Receiver PWBControl Unit EGEGeneral Error CodesAll System Groups Orion System Errors Error Message Description Fatal ErrorsNON-FATAL Errors ROM Fatal Systems Errors Operational Software Non-Fatal System ErrorsOperational Software Fatal System Errors Dacsnolock No LockRadio Programming Errors Message CodeEricsson Inc