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SYNTHESIZED TWO-WAY FM RADIO
DESCRIPTION ........................................................................................................................... 2
INITIAL MEASUREMENTS ..................................................................................................... 2
TRANSMITTER ........................................................................................................... 2
RECEIVER.................................................................................................................... 2
MAINTENANCE ........................................................................................................................ 3
PREVENTIVE MAINTENANCE ................................................................................ 3
DISASSEMBLY PROCEDURE ................................................................................... 4
ALIGNMENT PROCEDURES ................................................................................................... 7
INTRODUCTION ......................................................................................................... 7
TRACKING DATA....................................................................................................... 9
TEST FREQUENCIES.................................................................................................. 9
SETTING TRACKING DATA .....................................................................................10
TRANSMITTER ALIGNMENT.................................................................................................11
PA TRANSISTOR REPLACEMENT...........................................................................11
RECEIVER ALIGNMENT .........................................................................................................12
TEST EQUIPMENT REQUIRED ................................................................................12
ADJUSTMENT PROCEDURES ..................................................................................12
SQUELCH ADJUSTMENT..........................................................................................13
TROUBLESHOOTING GUIDE .................................................................................................13
INTRODUCTION .........................................................................................................13
MICROPHONICS .........................................................................................................13
SERVICEABLE PARTS...............................................................................................14
DIAGNOSTIC PROCEDURES ..................................................................................................15
ADDITIONAL TOOLS REQUIRED............................................................................16
ERROR CODES............................................................................................................19
SERVICE SECTION
ORION™
136-174 MHz Dual Bandwidth
TABLE OF CONTENTS
LBI-39175A
Page
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Summary of Contents for Ericsson ORION LBI-39175A Service section
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Page 1: Table Of Contents
LBI-39175A SERVICE SECTION ORION™ 136-174 MHz Dual Bandwidth SYNTHESIZED TWO-WAY FM RADIO TABLE OF CONTENTS Page DESCRIPTION ........................... 2 INITIAL MEASUREMENTS ..................... 2 TRANSMITTER ......................2 RECEIVER........................2 MAINTENANCE ........................3 PREVENTIVE MAINTENANCE ................3 DISASSEMBLY PROCEDURE ................... 4 ALIGNMENT PROCEDURES ....................7 INTRODUCTION ...................... -
Page 2: Description
Modulation Deviation Authorized Service Center. Any serviceable parts are listed in the troubleshooting guide for the individual circuit boards. RECEIVER 12 dB SINAD Sensitivity from FM signal generator Copyright© December 1995, Ericsson Inc. -
Page 3: Maintenance
LBI-39175A MAINTENANCE PREVENTIVE MAINTENANCE NOTE To ensure high operating efficiency, and to prevent mechanical and electrical failures from interrupting system operations, routine checks should be made of all mechanical and electrical equipment at regular intervals. This preventive maintenance should include the checks as listed in Table 1, Maintenance Checks. Table 1 - Maintenance Checks MAINTENANCE CHECKS INTERVAL... -
Page 4: Disassembly Procedure
LBI-39175A DISASSEMBLY PROCEDURE NOTE The VCO/Synthesizer circuitry is exposed by removing the screws from the shield casting, also To Remove the Unit from the Mounting Bracket located on the bottom of the module. However, this is not recommended, except on extreme situations. - Page 5 LBI-39175A Disengage the four captive screws on the rear half NOTE (also known as the Remote Interface Adapter, or RIA) of the Control Head. Slide the two halves For re-assembly of the Control Units (Front and apart, using care to avoid damaging the black "O- Remote Mounting) Revision "A"...
- Page 6 LBI-39175A Figure 1A - Front Mount Control Unit "O-Ring" Lubrication Figure 1B - Remote Mount Control Unit "O-Ring" Lubrication...
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Page 7: Alignment Procedures
LBI-39175A ALIGNMENT PROCEDURES CAUTION Before bench testing the radio, be sure of the output voltage characteristics of your bench power supply. INTRODUCTION To protect the transmitter power output transistors from possible instant destruction, the following input All operations of this radio are controlled by an voltages must not be exceeded embedded digital computer, which is programmed with a personality unique to the customer. - Page 8 LBI-39175A Figure 2 - ORION Programming Configurations (USA) Figure 3 - ORION Programming Configurations (EURO)
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Page 9: Tracking Data
LBI-39175A Furthermore, if the Tracking Data is lost, specialized procedures are required to load new Tracking Data. TRACKING DATA therefore, it is VERY IMPORTANT to establish a record of the Tracking Data of every radio as it is received from the factory. -
Page 10: Setting Tracking Data
LBI-39175A SETTING TRACKING DATA Normally, Tracking Data is set at the factory, and need not be re-loaded. However, the following repair situations 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 Deviation, Squelch, Feature Encryption, and Data Offset... -
Page 11: Transmitter Alignment
LBI-39175A TRANSMITTER ALIGNMENT NOTICE The components listed above have been set at the factory The Transmitter consists of synthesizer, exciter, and are NOT adjustable. and power amplifier. These have been calibrated at the ANY RE-ADJUSTMENT OF THESE COMPONENTS WILL factory so the radio computer automatically adjusts RF VOID THE WARRANTY OF THIS PRODUCT. -
Page 12: Receiver Alignment
LBI-39175A wire board runs to separate from the board. Check NOTE for shorts and solder bridges before applying power. Before aligning the receiver or making any adjustments to the radio, be sure that the outputs CAUTION of the 9 Volt Regulators IC230, IC503, and IC481 are 9.0 0.2 VDC. -
Page 13: Squelch Adjustment
LBI-39175A ISOLATION Not required if instrument input is balanced with respect TRANSFORMER to ground. DISTORTION 4-OHM ANALYZER LOAD AC VOLTMETER 1 : 1 Figure 4 - Audio Isolation Transformer SQUELCH ADJUSTMENT MICROPHONICS Squelch threshold has been set at the factory to 8 dB Synthesized radios tend to be sensitive to shock and SINAD. -
Page 14: Serviceable Parts
LBI-39175A Radio Unit - Power Amplifier 110 Watts SERVICEABLE PARTS CAH-515H Control Unit - Switch Circuit CDF-368B/M Capacitor, 270 pF (136-153 MHz) B19/5CAAA05042 Capacitor, 220 pF (150-174 MHz) B19/5CAAA03175 Capacitor, 270 pF (136-153 MHz) B19/5CAAA05042 Capacitor, 200 pF (150-174 MHz) B19/5CAAA05122 No serviceable parts. -
Page 15: Diagnostic Procedures
LBI-39175A possible to combine this test configuration with the PC DIAGNOSTIC PROCEDURES Programming configuration shown in Figures 2 and 3. This usually results in increased efficiency, since the service technician can alternate between programming and This product can be easily measured for maintenance hardware testing, as the need arises. -
Page 16: Additional Tools Required
LBI-39175A ADDITIONAL TOOLS REQUIRED RF Power Attenuator (30 dB, 150 watt, for transmitters with RF power beyond the capabilities of a Service Monitor) Digital Voltmeter Oscilloscope (optional) TRANSMITTER SYMPTOM DIAGNOSTIC PROCEDURE No RF power output. Program a Conventional System with frequencies given in Tables 2 and 3. Use "EDACS3"... - Page 17 LBI-39175A RECEIVER SYMPTOM DIAGNOSTIC PROCEDURE Low RF sensitivity. Program a Conventional System with frequencies given in Tables 2 and 3. Use "EDACS3" PC Programming utility. Unscrew the PA module from the TXRX module. Disconnect the coaxial cable P2 from J401 on the Synthesizer PWB. Do not disconnect any other cable.
- Page 18 LBI-39175A CONTROL UNIT SYMPTOM DIAGNOSTIC PROCEDURE Radio dead at power-on Check the battery connections and the Red lead A+ fuse on the power (display dark and no cable. lighted indicators) Turn the unit "OFF," then simultaneously press and hold the "EMERGENCY"...
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Page 19: Error Codes
LBI-39175A GENERAL SYMPTOM DIAGNOSTIC PROCEDURE Any hardware malfunction PWB substitution is a valid technique for service and repair of the ORION product, since there are only a few circuit boards in the product: RF Power Amplifier Logic/IF/Audio Synthesizer/Exciter/RX Front End Control Unit Panel Control Control Unit Switching Control Unit RIA (Remote Only) - Page 20 LBI-39175A message where xxx is the error code and the message is ERR = xxxx 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...
- Page 21 LBI-39175A 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 Fatal system error trap number.
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Page 22: Operational Software Fatal System Errors
LBI-39175A Operational Software Fatal System Errors ERROR NAME MESSAGE CODE DESCRIPTION RADC_PITD_ERROR TRACKING Personality tracking data error. Re-program the tracking data. RADC_PIHW_ERROR PERSDATA Personality hardware data error. Re-program the personality. RADC_FREQ_ERROR FREQDATA Personality frequency data error. Re-program the personality. RADC_PITD_MALLOC_ERROR SOFTWARE Personality tracking data malloc error. -
Page 23: Radio Programming Errors
LBI-39175A Radio Programming Errors Programming errors are divided into three categories: Protocol Errors - These are errors produced by the low level communication routines. Radio Errors - These are errors that are returned from the radio ROM or operating software. PC Errors - These are errors that are produced by the PC Programming software. - 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.
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