14 Organization of the Service Manual

Electronics Repair Manuals

Schematic Diagrams and Service Manuals

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This manual focuses on component-level repair of the Fluke 45 Dual Display Multimeter. To that end, manual chapters are often interdependent; effective troubleshooting may require not only reference to the troubleshooting procedures in Chapter 5, but also some understanding of the detailed Theory of Operation in Chapter 2 and some tracing of circuit operation in the Schematic Diagrams presented in Chapter 9.

Often, scanning the table of contents will yield an appropriate place to start using the manual. A comprehensive table of contents is presented at the front of the manual; local tables of contents are also presented at the beginning of each chapter for ease of reference. If you know the topic name, the index at the end of the manual is probably a good place to start.

The following chapter descriptions serve to introduce the manual:

Chapter 1. Introduction and Specifications

Introduces the Fluke 45 Dual Display Multimeter, describing its features, options, and accessories. This chapter also discusses use of the Service Manual and the various conventions used in describing the meter's circuitry. Finally, a complete set of specifications is presented.

Chapter 2. Theory of Operation

This chapter first categorizes meter circuitry into functional blocks, with a description of each block's role in overall operation. A detailed circuit description is then given for each block. These descriptions explore operation to the component level and fully support troubleshooting procedures defined in Chapter 5.

Chapter 3. General Maintenance

Provides maintenance information covering handling, cleaning, and fuse replacement. Access and reassembly procedures are also explained in this chapter.

Chapter 4. Performance Testing and Calibration

This chapter provides performance verification procedures that are tied to the specifications presented in Chapter 1. To maintain these specifications, a full calibration procedure is also presented.

Chapter 5. Diagnostic Testing and Troubleshooting

The troubleshooting procedures presented in this chapter rely closely on both the Theory of Operation presented in Chapter 2 and the Schematic Diagrams shown in Chapter 9. Chapter 3 provides access information.

Chapter 6. List of Replaceable Parts

Includes parts lists for all standard assemblies. Information on how and where to order parts is also provided.

Chapter 7. Option -01 Battery Pack

Each option is allocated a separate chapter: 7 for the Battery Pack Option -01 and 8 for the IEEE-488 Interface Option -05. Option -15 incorporates both Options -01 and -05. Chapter 7 includes the full range of Service Manual topics (specifications, theory of operation, maintenance, list of replaceable parts, etc.) for the Battery Pack option. Schematic diagrams for the options are found in Chapter 9.

Chapter 8. Option -05 IEEE-488 Interface

Includes the full range of Service Manual topics (specifications, theory of operation, maintenance, list of replaceable parts, etc.) for the IEEE-488 Interface option. Schematic diagrams for the options are found in Chapter 9.

Chapter 9. Schematic Diagrams

Includes schematic diagrams for all standard and optional assemblies. A list of mnemonic definitions is also included to aid in identifying signal name abbreviations.

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