Ericsson LBI-39175A manual Alignment Procedures, Introduction

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LBI-39175A

ALIGNMENT PROCEDURES

INTRODUCTION

All operations of this radio are controlled by an embedded digital computer, which is programmed with a personality unique to the customer. In order to align and test the radio, it must be programmed with a specific test personality, which will allow conventional operation on certain test frequencies. Furthermore, certain commands, known as Test Mode Commands, cause the radio to perform specific test functions. These will be noted as required in the following alignment and troubleshooting instructions.

In order to program an ORION personality, the radio and control unit must first be connected to a Personal Computer via a PC Programming Cable and hardware Programming Interface TQ3370 in one of the configurations shown in Figures 2 and 3. Accessories may be connected to the appropriate Accessory Cable 19B802554P1-P4 as needed.

The PC must be equipped with the PC Programming Software Version 4.0 or later. It is assumed in this manual that the Service Technician is familiar with the operation of the PC Programming Software Programs. Consult the PC Programming Software manuals for further details regarding this software.

CAUTION

Before bench testing the radio, be sure of the output voltage characteristics of your bench power supply.

To protect the transmitter power output transistors from possible instant destruction, the following input voltages must not be exceeded

Transmitter unkeyed:

16.5 Volts

Transmitter keyed

16.3 Volts

(50 ohms resistive load)

 

Transmitter keyed

14.0 Volts

(no load or non-resistive load):

 

These voltages are specified at the normal vehicle battery terminals of the radio and take the voltage drop of standard cables into account. The voltage limits shown for a non-optimum load is for "worst case" conditions. For antenna mismatches likely to be encountered in practice, the actual limit will approach the 16.3 Volt figure.

Routine transmitter tests should be performed at EIA Standard Test Voltages (13.6 VDC for loads of 6 to 16 amperes; 13.4 VDC for loads of 16 to 36 amperes). Input voltages must not exceed the limits shown, even for transient peaks of short duration.

Many commonly used bench power supplies cannot meet these requirements for load regulation and transient voltage suppression. Bench supplies which employ "brute force" regulation and filtering (such as Lapp Model 73) may be usable when operated in parallel with a 12 Volt automotive storage battery.

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Contents LBI-39175A Table of ContentsTransmitter DescriptionReceiver Maintenance Checks Interval MaintenancePreventive Maintenance Maintenance ChecksControl Unit Front Mounted Disassembly ProcedureTo Remove the Unit from the Mounting Bracket Transceiver Txrx ModuleTo Re-Assemble Unit after Servicing Front Mount Control Unit O-Ring Lubrication Introduction Alignment ProceduresLBI-39175A Test Frequencies Tracking DataSinad Setting Tracking DataSituation NEW Tracking Data Parameter LimitTransmitter Alignment PA Transistor ReplacementTo Replace the PA RF Transistors Receiver Alignment Adjustment ProceduresTest Equipment Required Squelch Adjustment Troubleshooting GuideMicrophonics Serviceable Parts Typical Orion Test Configuration Diagnostic ProceduresTransmitter Additional Tools RequiredPA PWB PWB ReceiverEGE Control UnitAll System Groups Orion System Errors Error CodesGeneral NON-FATAL Errors Fatal ErrorsError Message Description Operational Software Non-Fatal System Errors ROM Fatal Systems ErrorsDacsnolock No Lock Operational Software Fatal System ErrorsMessage Code Radio Programming ErrorsEricsson Inc
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