Motorola Astro Digital Saber III Manuel de service

ASTRO Digital SABERPortable RadiosBasic Service Manual*68P81076C05*

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A. Introduction to This SectionThis section of the manual describes preventivemaintenance, handling precautions, and some basicrepair procedures and t

5. Use a static-safeguarded workstation, which canbe accomplished through the use of an anti-statickit (Motorola part number 01-80386A82). This kitinc

A. Recommended Test EquipmentThe list of equipment contained in Table 2 includesall of the standard test equipment required for servic-ing two-way por

B. Service Aids and Recommended ToolsRefer to the following tables, “Service Aids forBoard-Level Troubleshooting” and “RecommendedTest Tools for Board

SECTION IV. PERFORMANCE CHECKS7A. Introduction to This SectionThis section covers performance checks used toverify the radio meets published specific

f. Press the top programmable button again;“3/1” appears, which indicates that the top programmable button is in the closed condition.g. Rotate the mo

9Reference Mode: PWR MON TEST MODE, PTT to continuous Frequency error to be ≤ ±600HzFrequency 4th channel test frequency❖4 CSQ (during theMonitor: Fre

10Reference Mode: PWR MON TEST MODE, PTT to continuous Frequency error to be ≤ ±600Hz.Frequency 4th channel test frequency❖4 CSQ (during theMonitor: F

A. Introduction to This SectionThis section describes both receiver and transmit-ter radio alignment procedures.B. GeneralAn IBM personal computer (PC

FOREWORDThe information contained in this manual relates to all ASTRO Digital SABER radios, unless otherwisespecified.SAFETY INFORMATIONThe Federal Co

All service and tuning procedures are performedfrom the SERVICE menu, which is selected by press-ing F2 from the MAIN MENU. Figure 2 illustrates howth

Perform the following procedures in thesequence indicated.NOTESome of the following screens may vary dependingupon the radio under test and the versio

D. Transmit Power AlignmentNOTE• All power measurements are to be made at theantenna port.• The transmitter power setting keeps the radiat-ed power at

E. Transmit Deviation Balance (Compensation) AlignmentCompensation alignment balances the modulationsensitivity of the VCO and reference modulation (s

F. Transmit Deviation Limit AlignmentIMPORTANT NOTEPut the radio in the RF test mode and scroll to theASTRO test environment, indicated by “AST” onthe

G. Front-End Filter Alignment (VHF/UHF Only)NOTEThis procedure is only required for tuning the front-end filter varactors in the VHF and UHF models.Th

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A. Disassembly(Refer to the following diagrams and the explodedview diagram located in the back of this manual.)1. Turn off the radio by rotating the

5. Gently push the center bottom edge of the frontshield assembly and lift it away from the bottomof the chassis. If necessary, use a small slottedscr

8. Remove the center shield from the chassis byinserting a thin slotted screwdriver between eachof five center-shield release clips and the corre-spon

Basic Service Manual68P81076C05-OCONTENTS© 1993 by Motorola, Inc., Radio Products Group8000 W. Sunrise Blvd., Ft. Lauderdale, FL 33322Printed in U.S.A

• When the knob is properly inserted, the armsof the switch bracket will snap into position(approximately 0.2 inches apart), the knob willnot be loose

23SECTION VII. BASIC THEORY OF OPERATIONA. Introduction to This SectionThe following theory will help isolate the problemto a particular board. Using

24active mixer coupled by transformers. Injection is pro-vided by the VCO through an injection filter. See Table14 for local oscillator (LO) and first

A. Introduction to This SectionThis section of the manual contains troubleshoot-ing charts, error codes, a functional block diagram,interconnect diagr

D. Operational Error CodesDuring radio operation, the radio performs dynam-ic tests to determine if the radio is working properly.Problems detected du

27Symptom Possible Cause Correction or Test (Measurements Taken at Room Temperature)No RF Power 1. TX Power Level Check TX power level and frequency

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RELATED PUBLICATIONS AVAILABLE SEPARATELYASTRO Digital SABER User’s Guide ...

iiiTypical Model Number: H04 U CF 9 P W 7 A N S P 0 1Position: 123 4 5 6 7 8 9 1011 1213141516Position 1 - Type of UnitH=Hand-Held PortablePositions 2

SPECIFICATIONS FOR VHF RADIOSAll specifications are per Electronic Industries Association (EIA) 316B unless otherwise noted.RF Power: 136-174MHz 1Watt

SPECIFICATIONS FOR UHF RADIOSAll specifications are per Electronic Industries Association (EIA) 316B unless otherwise noted.RF Power:450-512MHz1Watt/4

SPECIFICATIONS FOR 800MHz RADIOSAll specifications are per Electronic Industries Association (EIA) 316B unless otherwise noted.RF Power: 3 WattsFrequ

A. GeneralThis manual includes all the information necessaryto maintain peak product performance and maximumworking-time using the board-replacement s