Table Of Contents - Fluke 76 Service

Chapter
1 Introduction and Specifications ............................................................ 1-1
1-1. Introduction ............................................................................................. 1-3
1-2. Organization of the Service Manual ....................................................... 1-3
1-3. Conventions ............................................................................................ 1-3
1-4. Specifications .......................................................................................... 1-4
2 Theory of Operation ............................................................................... 2-1
2-1. Introduction ............................................................................................. 2-3
2-2. Functional Block Description ................................................................. 2-3
2-3. Circuit Descriptions ................................................................................ 2-3
2-4.
2-5.
2-6.
2-7.
2-8.
2-9.
2-10.
2-11.
2-12.
2-13.
2-14.
2-15.
2-16.
2-17.
2-18.
2-19.
2-20.
2-21.
2-22.
3 Maintenance ............................................................................................ 3-1
3-1. Introduction ............................................................................................. 3-3
3-2. Recommended Equipment ...................................................................... 3-3
3-3. Operator maintenance ............................................................................. 3-4
Title
Input Overload Protection .................................................................. 2-4
Rotary Knob Switch ........................................................................... 2-4
Input Signal Conditioning Circuits ..................................................... 2-4
Volts Functions .............................................................................. 2-4
Ohms Functions ............................................................................. 2-5
Current Functions ........................................................................... 2-6
Continuity, Low Ohms and Diode Test Functions ......................... 2-6
Analog Section of Integrated Multimeter IC (U4) ............................. 2-7
Capacitance Measurements ............................................................ 2-7
Frequency Measurements ............................................................... 2-7
Microcomputer Control ...................................................................... 2-8
Peripherals to U4 ................................................................................ 2-9
AC Buffer ....................................................................................... 2-10
AC Converter ................................................................................. 2-10
Active Filter ................................................................................... 2-10
A/D Converter ................................................................................ 2-10
Beeper ............................................................................................ 2-10
Power Supply ................................................................................. 2-10
Display ................................................................................................ 2-11
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