FLUKE 867b_863_service_manual 电路图.pdf

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 . 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 Operation. 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 Requirements . 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) . 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 Protection . 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 . 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 Hold . 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.Reasssembly . 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 Volts 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 Hold 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 . 4-23 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 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.