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SYNTHESIZED TWO-WAY FM RADIO
DESCRIPTION ............................................................................................................................................................... 2
INITIAL MEASUREMENTS ......................................................................................................................................... 2
TRANSMITTER............................................................................................................................................... 2
RECEIVER ....................................................................................................................................................... 2
MAINTENANCE ............................................................................................................................................................ 3
PREVENTATIVE............................................................................................................................................. 3
DISASSEMBLY PROCEDURES..................................................................................................................... 3
ALIGNMENT PROCEDURES....................................................................................................................................... 7
INTRODUCTION............................................................................................................................................. 7
TRACKING DATA .......................................................................................................................................... 9
TEST FREQUENCIES ..................................................................................................................................... 9
SETTING TRACKING DATA......................................................................................................................... 9
TRANSMITTER ALIGNMENT..................................................................................................................................... 10
PA TRANSISTOR REPLACEMENT............................................................................................................................. 11
RECEIVER ALIGNMENT ............................................................................................................................................. 11
TEST EQUIPMENT REQUIRED .................................................................................................................... 11
ADJUSTMENT PROCEDURES...................................................................................................................... 11
SQUELCH ADJUSTMENT ............................................................................................................................. 12
TROUBLESHOOTING GUIDE ..................................................................................................................................... 12
INTRODUCTION............................................................................................................................................. 12
MICROPHONICS............................................................................................................................................. 12
SERVICEABLE PARTS................................................................................................................................... 13
DIAGNOSTIC PROCEDURES ...................................................................................................................................... 14
ADDITIONAL TOOL REQUIRED.................................................................................................................. 14
TRANSMITTER............................................................................................................................................... 15
RECEIVER ....................................................................................................................................................... 16
CONTROL UNIT ............................................................................................................................................. 17
GENERAL ........................................................................................................................................................ 18
ERROR CODES................................................................................................................................................ 18
SERVICE SECTION
ORION™
806 - 870 MHz
TABLE OF CONTENTS
LBI-39073A
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Summary of Contents for Ericsson ORION LBI-39073A
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Page 1: Table Of Contents
LBI-39073A SERVICE SECTION ORION™ 806 - 870 MHz SYNTHESIZED TWO-WAY FM RADIO TABLE OF CONTENTS Page DESCRIPTION ................................2 INITIAL MEASUREMENTS ............................2 TRANSMITTER............................... 2 RECEIVER ............................... 2 MAINTENANCE ................................3 PREVENTATIVE............................. 3 DISASSEMBLY PROCEDURES........................3 ALIGNMENT PROCEDURES............................7 INTRODUCTION............................. 7 TRACKING DATA ............................ -
Page 2: Description
RECEIVER few serviceable component parts contained on any of the circuit boards within the radio. Normally, defective boards • 12 dB SINAD sensitivity should be replaced and returned to an Authorized Ericsson Copyright© May 1994, Ericsson GE Mobile Communications Inc. -
Page 3: Maintenance
LBI-39073 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 Procedures
LBI-39073 DISASSEMBLY PROCEDURE Disconnect Flex Circuit PC2 from connector J701, by carefully disengaging the locking tab from each side To Remove Unit From Mounting Bracket of the connector with a jeweler's screwdriver or tweezers. Use extreme care not to damage plating Remove the microphone, power and accessory/remote runs or surface mounted components on the printed control cables, as required. - Page 5 LBI-39073 specifications for screw engagement during reassembly. These specifications are given in maintenance manual Put the silicon grease on the black O-Ring gasket, LBI-38909. covering the surface of the gasket evenly (see Figure 1A and 1 B). NOTE CAUTION Note Text Note Text Note Text Note Text Note Text Note Text No Fibers of the cloth must remain on the gasket after the silicone is applied.
- Page 6 LBI-39073 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
Routine transmitter test should be performed at EIA Standard Test Voltages (13.6 Vdc for loads of 6 to 16 The PC must be equipped with the Ericsson GE PC amperes; 13.4 Vdc for loads of 16 to 36 amperes). Programming Software, Version 4.0 or later. It is assumed... - Page 8 LBI-39073 Figure 2 - ORION Programming Configurations...
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Page 9: Tracking Data
LBI-39073 Tracking Data is lost, specialized procedures are required TRACKING DATA to load new Tracking Data. Therefore, it is VERY IMPORTANT to establish a record of the Tracking Data The radio personality contains certain information of every radio as it is received from the factory. The bytes known as Tracking Data, which allow the radio frequencies at which Tracking Data is established are computer to calibrate transmitter power , modulation... -
Page 10: Transmitter Alignment
RF in Table 2 or Table 3. Measurements should be power and modulation deviation, based upon Tracking within the following limits: Data. The following adjustments can be made by Ericsson GE PC Programming Software: PARAMETER LIMIT TX Modulation Deviation 4.4 ±... -
Page 11: Pa Transistor Replacement
LBI-39073 There are no other adjustments to be made on the remaining length of transistor lead to the board. Take transmitter. However, there are components located on the care not to use excessive heat that causes the printed synthesizer and power amplifier, which appear to be wire board runs to separate from the board. -
Page 12: Squelch Adjustment
12 dB SINAD at audio output. circuit boards within the radio. Normally, defective boards should be replaced and returned to an Authorized Ericsson Adjust coils L502, L504, L505, and L507 to obtain GE Service Center. A list of serviceable parts is given in minimum 12 dB SINAD. -
Page 13: Serviceable Parts
LBI-39073 Radio Unit - System Control Logic CMC-682 When servicing the radio be sure that no solder build- up has occurred on the chassis or shield. F601 Fuse, 5 amp. B19/5ZFAP00008 IC604 AF Power Amplifier B19/5DAAA00350 J701 Connector, 18 pin B19/5JDAG00315 To assure a high degree of resistance to microphonics be sure to replace exactly, all hardware removed. -
Page 14: Diagnostic Procedures
LBI-39073 DIAGNOSTIC PROCEDURES This product can be easily measured for maintenance using a Communications Service Monitor, of which several models are available. A typical test configuration for the ORION product is shown in Figure 4. NOTE It is also possible to combine this test configuration with the PC programming configuration shown in Figure 2. This usually results in increased efficiency, since the service technician can alternate between programming and hardware testing, as the need arises. -
Page 15: Transmitter
LBI-39073 TRANSMITTER SYMPTOM DIAGNOSTIC PROCEDURE No RF power output a) Program a conventional system with frequencies given in Table 2 or 3. Use the "EDACS3" PC Programming utility. b) Check RF Power Tracking Data, using the "MRKMAINT" PC programming utility. Data should be the same as that shipped with the radio. -
Page 16: Receiver
LBI-39073 RECEIVER SYMPTOM DIAGNOSTIC PROCEDURE Low RF sensitivity a) Program a Conventional System with frequencies given in Tables 2 or 3. Use "EDACS3" PC programming utility. b) Unscrew the PA module from the TXRX module. Disconnect coaxial cable P2 from J401 on the Synthesizer board. -
Page 17: Control Unit
LBI-39073 CONTROL UNIT SYMPTOM DIAGNOSTIC PROCEDURE Radio dead at a) Check battery connections and the Red Lead A+ fuse on the Power Cable. power-on (display dark and no b) Turn unit "OFF", then simultaneously press and hold "EMERGENCY" and lighted indicators) "OPTION"... -
Page 18: General
LBI-39073 GENERAL SYMPTOM DIAGNOSTIC PROCEDURE Any Hardware malfunction Printed Wire Board substitution is a valid technique for service and repair 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 19 LBI-39073 message where xxx is the error code and the message is ERR = xxxx one of the messages listed below Figure 5 - Error Message/Code Display FATAL ERRORS NON-FATAL ERRORS ERROR MESSAGE DESCRIPTION ERROR MESSAGE DESCRIPTION HARDWARE ROM errors UNKNOWN SOFTWARE General software failure...
- Page 20 LBI-39073 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.
- Page 21 LBI-39073 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_ SOFTWARE Personality tracking data malloc error.
- Page 22 PC - Abort, message canceled Aborted by operator, message canceled. PC - Requested personality data does The personality table does not exist (Tracking or Encryption table). not exist Ericsson Inc. Private Radio Systems Mountain View Road Lynchburg, Virginia 24502 1-800-528-7711 (Outside USA, 804-528-7711)
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