Motorola Astro Digital Mobile Radio Xtl5000 Detailled 6881096c74 B Manual

Deta ile d S erv ic e  M anual
A STR O® 
VH F
UHF R an ge  1  a n d 2
7 00– 800  M Hz
M obile  R adio 

Title PageASTRO® Digital XTL™5000
VHF/UHF Range 1/UHF Range 2/700
–800 MHz
Mobile Radio
Detailed Service Manual
Motorola, Inc.
8000 West Sunrise Boulevard
Fort Lauderdale, Florida 33322
6881096C74-B 

Foreword
The information contained in this manual relates to all ASTRO® Digital XTL™ 5000 VHF/UHF Range 1/UHF Range 2/700–
800 MHz mobile radios equipped with W3, W4, W5, W7, or W9  control heads, unless otherwise specified. This manual 
provides sufficient information to enable qualified service  technicians to troubleshoot and repair XTL 5000 radios to the 
component level.
For details on radio operation or basic troubleshooting, refer  to the applicable manuals available separately. A list of relate...

iii
Document History
The following major changes have been implemented in this manual since the previous edition:
EditionDescriptionDate
6881096C74-BAdded VHF High Power and UHF R1 High Power 
models.May, 2005 

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Table of Contentsv
6881096C74-BMay 25, 2005
Table of Contents
Foreword......................................................................................................... ii
Document History ......................................................................................... iii
List of Figures .............................................................................................. xv
List of Tables...

viTable of Contents
May 25, 2005 6881096C74-B
Chapter 1 Introduction .......................................................................... 1-1
1.1 Notations Used in This Manual .................. ....................................................................................1-1
1.2 General..................................................................................................................... ......................1-1
Chapter 2 Product...

Table of Contentsvii
6881096C74-BMay 25, 2005
3.2.3 700–800 MHz Band.........................................................................................................3-10
3.3 Radio Power Distribution ..............................................................................................................3-12
3.4 Receiver Front-End ......................................................................................................................3-13
3.4.1 VHF (136–174 MHz) Band...

viiiTable of Contents
May 25, 20056881096C74-B
3.6.4.1 35-Watt Transmitter................................................................................................3-41
3.7 Frequency Generation Unit (FGU) ...............................................................................................3-45
3.7.1 VHF (136-174 MHz) Band ...............................................................................................3-45
3.7.1.1 Reference Oscillator...