FLUKE 867b_863_service_manual 电路图.pdf

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1、 867B,863 Graphical Multimeters Service Manual PN 689312 December 1997 1997 Fluke Corporation, All rights reserved. Printed in U.S.A. All product names are trademarks of their respective companies. RadioFans.CN 收音机爱 好者资料库 i Table of Contents ChapterTitlePage 1Introduction and Specifications. 1-1 1-1

2、 . Introduction . 1-3 1-2. Description . 1-3 1-3. Power Requirements . 1-3 1-4. Options, Accessories and Related Equipment . 1-4 1-5. Operating Instructions . 1-4 1-6.Obtaining Service . 1-4 1-7.Conventions Used in This Manual . 1-5 1-8.Chapter Contents . 1-5 1-9.Specifications . 1-6 2Theory of Oper

3、ation. 2-1 2-1.Introduction . 2-3 2-2. Start-Up Sequence . 2-3 2-3. Function Selection . 2-3 2-4.Power Supply . 2-4 2-5.Power Supply Input Voltages . 2-4 2-6.Power Supply Output Voltages and Currents . 2-6 2-7.Power Supply Signals . 2-7 2-8.Power ON/OFF Requirements . 2-8 2-9.NiCd Charging Requireme

4、nts . 2-8 2-10.Battery and Line Level Detection . 2-8 2-11.Power Supply Functional Blocks . 2-9 2-12.Input Power Selector (A) . 2-9 2-13.Boost Preregulator (B) . 2-10 2-14.Battery Charger (C) . 2-10 2-15.DC-DC Converter (D) . 2-12 2-16.Backlight Current Sink (E) . 2-12 2-17.Power Switch Circuitry (F

5、) . 2-12 2-18.LCD Contrast Control (G) . 2-12 2-19.Power-On Reset Circuit (H) . 2-12 2-20.Linear Post Regulators (I) . 2-13 2-21.Input Overload Protection . 2-13 RadioFans.CN 收音机爱 好者资料库 Contents (continued) ii 2-22.Volt/Ohms Input Protection . 2-13 2-23.External Trigger and Logic Activity Input Prot

6、ection . 2-14 2-24.Amps / mA / A Input Protection . 2-14 2-25.Input Signal Conditioning . 2-14 2-26.AC Volts . 2-14 2-27.DC Volts . 2-16 2-28.mV DC . 2-16 2-29.Ohms . 2-17 2-30.Diode Test . 2-17 2-31.Capacitance . 2-17 2-32.mA/A . 2-18 2-33.Amps . 2-18 2-34.Waveform Processing . 2-19 2-35.Overview .

7、 2-19 2-36.Detailed Description . 2-19 2-37.Waveform Triggering . 2-20 2-38.Overview . 2-20 2-39.Dual Trigger . 2-20 2-40.Single Trigger . 2-21 2-41.External Trigger . 2-21 2-42.Glitch Capture . 2-22 2-43.Single Shot . 2-22 2-44.Frequency Trigger . 2-22 2-45.Logic Activity Trigger . 2-22 2-46.Peak H

8、old . 2-22 2-47.Auto Diode . 2-22 2-48.Component Test . 2-23 2-49.Digital Circuitry . 2-24 2-50.RS-232 Serial Port . 2-24 3Maintenance. 3-1 3-1.Introduction . 3-3 3-2.Warranty Repairs and Shipping Information . 3-3 3-3.Static-Safe Handling . 3-3 3-4.Cleaning . 3-4 3-5.Disassembly . 3-4 3-6.Reasssemb

9、ly . 3-7 3-7.Replacing the 440 mA Fuse . 3-9 3-8.Replacing the 11A (High Energy) Fuse . 3-9 4Perfomance Testing and Calibration. 4-1 4-1.Introduction . 4-3 4-2.Required Test Equipment . 4-3 4-3.Alternative Test Equipment (Fluke 5500A) . 4-3 4-4.Performance Tests . 4-4 4-5.mV DC Test . 4-4 4-6.DC Vol

10、ts Test . 4-6 4-7.Diode Test . 4-7 4-8.AC Volts Test . 4-8 4-9.Ohms and Conductance Tests . 4-10 4-10.Capacitance Test . 4-11 4-11.Frequency Test . 4-12 4-12.Duty Cycle Test . 4-14 4-13.Logic Test (867B Only) . 4-15 RadioFans.CN 收音机爱 好者资料库 Contents (continued) iii 4-14.Amps Tests . 4-16 4-15.Peak Ho

11、ld Test . 4-19 4-16.Component Test (867B Only) . 4-19 4-17.Rel Test/Touch Hold Test . 4-20 4-18.Glitch Capture Test . 4-21 4-19.External Trigger Test . 4-21 4-20.Calibration . 4-22 4-21.Measuring the System Resistance . 4-22 4-22.Starting Calibration Mode on the GMM . 4-22 4-23.mV DC Calibration . 4

12、-23 4-24.DC Volts Calibration . 4-24 4-25.DC mAuA Calibration . 4-24 4-26.DC Amps Calibration . 4-24 4-27.Ohms/nS Calibration . 4-25 4-28.Modifying the Displayed Value . 4-25 4-29.Ohms Calibration . 4-26 4-30.AC Volts Calibration . 4-27 4-31.AC mA(A Calibration . 4-27 4-32.AC Amps Calibration . 4-27

13、 4-33.Internal Constants Calibration . 4-28 4-34.Setting LCD Voltage . 4-28 5List of Replaceable Parts. 5-1 5-1.Introduction . 5-3 5-2.How To Obtain Parts . 5-3 5-3.Manual Status Information . 5-3 5-4.Newer Instruments . 5-3 5-5.Service Centers . 5-4 5-6.Parts . 5-4 6Schematic Diagrams. 6-1 iv List of Tables TableTitlePage 1-1.Power Sources. 1-4 1-2.Accessories Included with Each GMM. 1-4 2-1.Power Supply Inputs. 2-4 2-3.Power Supply Signals.