Motorola Pr400 Basic 6881096c24 A Manual

MOTOROLA and The Stylized M logo are trademarks of Motorola, Inc.
All other product or service names are the property of their respective owners.
© 2004 Motorola, Inc. All rights reserved. Printed in U.S.A.*6881096C24*6881096C24-A
PR400
™
Commercial SeriesPortable Radio 
Basic Service Manual 

PR400 Portable Radio
Basic Service Manual
VHF 136-162 MHz
VHF 146-174 MHz
UHF 403-440 MHz
UHF 438-470 MHz
UHF 465-495 MHz
Motorola, Inc.
1301 E. Algonquin Road
Schaumburg, IL 60196
6881096C24-A 

ii
Foreword
This manual is intended for use by service technicians familiar with similar types of equipment. It contains 
service information required for the equipment described and is current as of the printing date. Changes which 
occur after the printing date may be incorporated by a complete Manual revision or alternatively as additions.
Product Safety and RF Exposure Compliance
AT T E N T I O N !
This radio is restricted to occupational use only to satisfy FCC RF energy exposure requirements....

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6881096C24-AJuly, 2004
Table of Contents
Foreword............................................................................................................................................ ii
Product Safety and RF Exposure Compliance .................................................................................. ii
Computer Software Copyrights.......................................................................................................... ii
Document Copyrights...

ivTable of Contents
July, 20046881096C24-A
5.3 Radio Tuning Setup ....................................................................................................................... 5-2
5.3.1 Initial Test Equipment Control Settings ............................................................................. 5-3
5.4 Transmitter Alignment Options ...................................................................................................... 5-3
5.4.1 Reference Oscillator Warp...

Table of Contentsv
6881096C24-A July, 2004
Chapter 7 Limited Keypad Model Disassembly and
Re-assembly .......... .................................... .......................... 7-1
7.1 Introduction ................................................................................................................ .................... 7-1
7.2 Preventive Maintenance ...................................................................................................... .......... 7-1
7.2.1 Inspection...

viTable of Contents
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Chapter 9 Troubleshooting Tables ..................................................... 9-1
9.1 Power-Up Error Codes................................................................................................................... 9-1
9.2 Operational Error Codes ................................................................................................................ 9-1
9.3 Troubleshooting Table for Receiver...

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6881096C24-AJuly, 2004
List of Figures
Figure 2-1. Major Assemblies Block Diagram..................................................................................... 2-1
Figure 2-2. Transceiver Block Diagram .............................................................................................. 2-2
Figure 3-1. Programming/Test Cable ................................................................................................. 3-4
Figure 3-2. Wiring of the Connectors...

viiiTable of Contents
July, 20046881096C24-A
Figure 7-11. Dust Cap Re-assembly..................................................................................................... 7-9
Figure 7-12. Microphone Re-assembly ............................................................................................... 7-10
Figure 7-13. Speaker Re-assembly .................................................................................................... 7-10
Figure 7-14. Keypad Re-assembly...