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VS2.5 Transmitter

Troubleshooting Manual

Document:NHB-VS2.5-TRB-4.0

Issue: 4.0 2012-12-01

Status: Standard

Nautel Limited

10089 Peggy’s Cove Road

Hackett’s Cove, NS Canada B3Z 3J4

Phone: +1.902.823.3900 or

Toll Free: +1.877.6NAUTEL (6628835) (Canada & USA only)

Fax: +1.902.823.3183

Nautel Inc.

201 Target Industrial Circle

Bangor, Maine USA 04401

Phone: +1.207.947.8200

Fax: +1.207.947.3693

Customer Service (24 hour support)

+1.877.628.8353 (Canada & USA only)

+1.902.823.5100 (International)

Email: [email protected]

Web: www.nautel.com

The comparisons and other information provided in this document

have been prepared in good faith based on publicly available

information. The reader is encouraged to consult the respective

manufacturer's most recent published data for verification.

© Copyright 2012+ NAUTEL. All rights reserved.

VS2.5 Troubleshooting Manual Table of contents

Page v

Contents

Release control record ix

About this manual xi

About safety xv

Safety precautions xvii

Responding to alarms 1-1

Corrective maintenance 1-1

Electrostatic protection 1-3

Identifying an alarm 1-4

Troubleshooting tips 1-25

Operating with defective PAs or cooling fans 1-26

Replacing a suspect PWB, power supply or fan 1-27

PA PWB replacement 1-29

Pre-amp/IPA PWB replacement 1-30

Power Supply Module Replacement 1-33

+48 V Power Supply Replacement 1-34

Cooling fan replacement - fans 3 (B3) through 7 (B7) 1-35

Cooling fan replacement - fans 1 (B1) and 2 (B2) 1-37

Exciter/Control PWB Replacement 1-39

PS Distribution PWB Replacement 1-42

Combiner Interface PWB Replacement 1-43

VS2.5 Troubleshooting Manual Table of contents

Page vi Issue 4.0 2012-12-01

Detailed Circuit Descriptions 2-1

Exciter/control PWB (NAPE87) 2-1

PS distribution PWB (NAPS43A) 2-2

Pre-amp/IPA PWB (NAPA28B) 2-3

Power amplifier PWB (NAPA31B) 2-4

Parts Lists 3-1

Parts information 3-1

Family tree 3-1

How to locate information about a specific part 3-1

Column content 3-2

OEM code to manufacturer’s cross-reference 3-3

Common abbreviations/acronyms 3-4

Wiring/connector lists 4-1

Wiring lists provided 4-1

Wiring lists not provided 4-1

Connector mating information 4-1

Wire colours 4-1

Printed wiring board patterns 4-1

Reading Electrical Schematics 5-1

Component values 5-1

Graphic symbols 5-1

Logic symbols 5-1

Reference designations 5-1

Unique symbols 5-2

Identifying schematic diagrams 5-2

Structure of schematics 5-2

Locating schematic diagram(s) for a functional block 5-3

Locating a part or assembly on a schematic 5-3

VS2.5 Troubleshooting Manual Table of contents

Issue 4.0 2012-12-01 Page vii

Mechanical Drawings 6-1

Identifying mechanical drawings 6-1

Content of mechanical drawings 6-1

Locating a part or assembly on a mechanical drawing 6-1

List of terms 7-1

VS2.5 Troubleshooting Manual Table of contents

Page viii Issue 4.0 2012-12-01

VS2.5 Troubleshooting Manual

Issue 4.0 2012-12-01 Page ix

Release control record

Issue Date Reason

4.0 2012-12-01 Release 4 of manual (NARF66C and NARF66C/01).

CE compliant.

VS2.5 Troubleshooting Manual

Page x Issue 4.0 2012-12-01