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HP Manuals
Measuring Instruments
3720A
Service manual
HP 3720A Service Manual
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Table of Contents
Accessories Furnished with 3720A
General Servicing Instructions
Operating Instructions
Section I Introduction
Front Panel Controls and Indicators
Rear Panel Controls and Connectors
Section II General Maintenance
Identification
Assembly Connection Identification
Integrated Circuit Identification
Removing Top and Bottom Covers
Front Panel Access
Removing Side Covers
Introduction
Maintenance
Locations of DC Power Supply Fuses
Replacement of Display Sensitivity Lamps
Cleaning the Air Filter
Cathode Ray Tube Removai/Repiacement
Line Transformer Removal/Replacement
Chassis Mounted Transistors Plate Removal/Replacement
High Voltage Tripler Assembly Removal/Replacement
Repair Procedures
Etched Circuits
Integrated Circuit Removal/Replacement
3-9
3 8 List of Abbreviations
Replaceable Parts
3-1
3 Code List of Manufacturers
Section IV System Troubleshooting
Introduction
Using Troubleshooting Section
Test Equipment
Logic Probe
System Troubleshooting Controls Set-Up
FLOW a . Control Faults
Display Sensitivity Faults
4-16
4 FLOW C . Data Transfer Faults
FLOW D Other Transferred Signals Faults
FLOW D(A)
Timescale Transfer Faults
Gain Correction Factors Transfer Faults
4-6
4-5
4-4
4-25
4-23
4-21 FLOW D . Other Transferred Signals Faults
FLOW D(C) . Signal Recovery Transfer Faults
Gain Correction Factors Check
Signal Recovery Transfer Check
Introduction
Drawing Symbols
5-3
Assembly Packages
Locating Assembly Packages
Theory of Operation
Functional Diagram
Figure
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Table of Contents
Troubleshooting
SECTION IV SYSTEM TROUBLESHOOTING
71
SYSTEM TROUBLESHOOTING CONTROLS SET-UP
73
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