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Ericsson LBI-39175A manual

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Table of contents for the manual

  • Page 1

    LBI-39175A ericssonz SERVICE SECTION ORION™ 136-174 MHz Dual Bandwidth SYNTHESIZED TWO-WAY FM RADIO TABLE OF CONTENTS Page DESCRIPTION ........................................................................................................................... 2 INITIAL MEASUREMENTS ..................................................................[...]

  • Page 2

    L BI-39175A 2 DESCRIPTION This section co ntains the inform ation required to service th e ORION VHF Du al Bandwidth tw o-w ay FM radio. Inclu ded are disassembly procedures, align men t procedures, and trou bleshooting inform ation (see Table of Contents). This radio is adjusted b y setting personality paramet ers stored i n th e radio's comp[...]

  • Page 3

    LBI-39175 A 3 MAINTENANCE PREVENTIVE MAINTENANCE To ensure h igh operating eff iciency , and to preven t mech anical and electrical f ailures from interru pting sy stem operations, routin e checks sh ould be m ade of all m echanical an d electrical equipm ent at regular interv als. T his preventive m ainten ance should in clude the checks as listed[...]

  • Page 4

    L BI-39175A 4 DISASSEMBLY PROCEDURE To Remove the Unit from the Mounting Bracket 1. Remove Microphone, Power, and Accessory/Remote Control Cables, as required. 2. Remove the lock screws at the side of the radio unit, using a No. 20 TORX  driver. 3. Pull the radio, and remove the mounting bracket. To Gain Access to the Circuitry for Servicing RF [...]

  • Page 5

    LBI-39175 A 5 3. Disengage the four captive screw s on the rear half (also know n as th e Rem ote Interface Adapter, or RIA) of the Control Head. Slide the tw o halves apart, usin g care to avoid dam agi ng the black "O- Ring" moisture gasket attached to the RIA. 4. Discon nect Flex Circu it PC2 f rom Conn ector J2, by carefully disen gag[...]

  • Page 6

    L BI-39175A 6 Figure 1A - Front Mount Control Unit "O-Ring" Lubrication Figure 1B - Remote Mount Control Unit "O-Ring" Lubrication[...]

  • Page 7

    LBI-39175 A 7 ALIGNMENT PROCEDURES INTRODUCTION All operations of this radio are controlled by an embedded digi tal com puter, w h ich i s program m ed w ith a personality unique to the customer. In order to align and test the radio, i t m ust be prog ram m ed w ith a s pecific t est personality, w hich w ill allow conventional o peration o n certa[...]

  • Page 8

    L BI-39175A 8 Figure 2 - ORION Programming Configurations (USA) Figure 3 - ORION Programming Configurations (EURO)[...]

  • Page 9

    LBI-39175 A 9 TRACKING DATA The radio p ersonality contains certain information bytes know n as Tracking Data, which allow the radio computer to calibrate transmitter power, modulation deviation, and squelch threshold . Normally , no adjustments need be m ade to the radio to maintain specified lim its for the abov e parameters, sin ce the radio com[...]

  • Page 10

    L BI-39175A 10 SETTING TRACKING DATA Normally , Tracking Data is set at the factor y , and need no t be re-loaded. Ho wever, the f ollowing repair situatio ns require re-loading some or all of the Tracking Data: SITUATION NEW TRACKING DATA Replace PA module RF Power, Squelch (Check: Re-load if necessary.) Replace TXRX module RF Power, Modulation De[...]

  • Page 11

    LBI-39175 A 11 TRANSMITTER ALIGNMENT The Transmitter consists of sy nthesizer, exciter, and pow er am plifier. These have been calibrated at the factory so the radio com puter autom atically adjusts RF pow er and m odulat ion devi ation, bas ed upon Tracking Data. The follow ing adjustm ents can be m ade by EGE PC Programming Software: 1. Mo dulati[...]

  • Page 12

    L BI-39175A 12 w ire board runs to separate f rom the board. Check for shorts and solder bridges before applying power. Failure to solder the transistor leads as directed may resul t in th e gen eration of RF loops that could dam age th e transistor or m ay cause low pow er outpu t. CAUTION RECEIVER ALIGNMENT Alignment of the Front End and Local In[...]

  • Page 13

    LBI-39175 A 13 SQUELCH ADJUSTMENT Squelch th reshol d has been set at th e factory to 8 dB SINAD. A djust me nt of the threshol d requires chang ing the Tracking Data. To change th e Squelch Tracking Data, follow the iterative procedure set forth in the "T RACKING DATA" section, except let the de sired squelch threshold level replace the [...]

  • Page 14

    L BI-39175A 14 SERVICEABLE PARTS Control Unit - Switch Circuit CDF-368B/M No serviceable parts. Control Unit - Panel Control CMC-638 No serviceable parts. Remote Control Unit - RIA NQZ-4882 J2 Connector, 18 Pin B19/5JBAX00020 Radio Unit - System Control CMC-682 F601 Fuse, 5 Amp B19/5ZFAP00008 IC604 AF Power Amplifier B19/5DAAA00350 J701 Connector, [...]

  • Page 15

    LBI-39175 A 15 DIAGNOSTIC PROCEDURES This product can be easily measu red for m aintenance using a Communications Service M onitor, o f w hich several m odels are available. A ty pical test conf iguration for th e OR ION product is s how n in Figu re 5. It is als o possible to combine this test configuration with the PC Pro gramming configuration s[...]

  • Page 16

    L BI-39175A 16 ADDITIONAL TOOLS REQUIRED • RF Pow er Attenu ator (30 dB, 150 w att, for trans mitters w ith RF pow er bey ond the capabilities of a Service Monitor) • Digital Voltmeter • Oscilloscope (optional) TRANSMITTER SYMPTOM DIAGNOSTIC PROCEDURE No RF power output. a. Program a Conventional Sy stem w ith frequencies given in Tables 2 an[...]

  • Page 17

    LBI-39175 A 17 RECEIVER SYMPTOM DIAGNOSTIC PROCEDURE Low RF sensitivity. a. Pro gram a Conventional System w ith frequencies given in T ables 2 and 3. Use "EDACS3" PC Programming utility. b. Unscrew the PA m odule from th e TXRX module. Disconnect the coaxial cable P2 from J401 on the Sy nthesizer PWB. Do n ot dis connect any other cable.[...]

  • Page 18

    L BI-39175A 18 CONTROL UNIT SYMPTOM DIAGNOSTIC PROCEDURE Radio dead at power-on (display dark and no lighted indicators) a. Check the battery con nections an d the Red lead A + fuse on the pow er cable. b. T urn the unit "OFF," then simultaneously press and hold the "EMERGENCY" and "OPTION" buttons, w hile turning th e[...]

  • Page 19

    LBI-39175 A 19 GENERAL SYMPTOM DIAGNOSTIC PROCEDURE Any hardware malfunction PWB substitution is a valid technique for service and re pair of the ORION product, since there are only a few circuit boards in the product: 1. RF Power Amplifier 2. Logic/IF/Audio 3. Synthesizer/Exciter/RX Front End 4. Control Unit Panel Control 5. Control Unit Switching[...]

  • Page 20

    L BI-39175A 20 message ERR = xxxx where xxx is the error code and the message is one of the messages listed below Figure 6 - Error Message/Code Display FATAL ERRORS NON-FATAL ERRORS ERROR MESSAGE DESCRIPTION ERROR MESSAGE DESCRIPTION HARDWARE ROM errors UNKNOWN SOFTWARE General software failure FEAT ERR Feature encryption error TRACKING Tracking da[...]

  • Page 21

    LBI-39175 A 21 ROM Fatal Systems Errors ROM fatal errors may be corrected by cycling the radio power (turn it off then on). When the power cycle does not correct the problem the radio must be serviced. ERROR NAME MESSAGE CODE DESCRIPTION FATAL_SYS_TRAP HARDWARE 0 Fatal system error trap number. FATAL_NMI_ERROR HARDWARE 1 NMI occurred outside of sle[...]

  • Page 22

    L BI-39175A 22 Operational Software Fatal System Errors ERROR NAME MESSAGE CODE DESCRIPTION RADC_PITD_ERROR TRACKING 200 Personality tracking data error. Re-program the tracking data. RADC_PIHW_ERROR PERSDATA 201 Personality hardware data error. Re-program the personality. RADC_FREQ_ERROR FREQDATA 2 02 Personality frequency data error. Re-program t[...]

  • Page 23

    LBI-39175 A 23 Radio Programming Errors Programming errors are divided into three categories: 1. Protocol Errors - These are errors produced by the low level communication routines. 2. Radio Errors - These are errors that are returned from the radio ROM or operating software. 3. PC Errors - These are errors that are produced by the PC Programming s[...]

  • Page 24

    Ericsson Inc. Private Radio Systems Mountain View Road Lynchburg, Virginia 24502 1-800-592-7711 (Outside USA, 804-592-7711) Printed in U.S.A.[...]