Fluke 77 User Manual
Page 2
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Table of Contents
Chapter
Title
Page
1
Introduction and Specifications ................................. 1-1
1-1.
Introduction ................................................................. 1-3
1-2.
Organization of the Service Manual ........................... 1-3
1-3.
Conventions ................................................................ 1-4
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.
Detailed Description ................................................... 2-3
2-4.
Voltage Signal Conditioning .................................. 2-3
2-5.
Current Conditioning .............................................. 2-4
2-6.
Ohms ....................................................................... 2-4
2-7.
Additional Circuitry ................................................ 2-4
2-8.
AC Converter ..................................................... 2-5
2-9.
Active Filter ....................................................... 2-5
2-10.
Rotary Switch ..................................................... 2-5
2-11.
A/D Conversion .................................................. 2-5
3
Maintenance ................................................................ 3-1
3-1.
Introduction ................................................................. 3-3
3-2.
PCA Access and General Maintenance ...................... 3-3
3-3.
Display Access ............................................................ 3-4
3-4.
Cleaning ...................................................................... 3-4
3-5.
Performance Test ........................................................ 3-7
3-6.
Initial Procedure ..................................................... 3-7
3-7.
DC Voltage Test ..................................................... 3-7
3-8.
AC Voltage Test ......................................................... 3-8
3-9.
Resistance Test ....................................................... 3-8