FLUKE 5725A Instruction 电路图.pdf

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1、 5725A Amplifier Instruction Manual PN 823435 January 1989 Rev. 6, 6/96 1993, 1996 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 RadioFans.CN 收音机爱 好者资料库 i Table of Contents ChapterTitlePage 1Introduct

2、ion and Specifications. 1-1 1-1.Introduction. 1-3 1-2.Where to Go From Here. 1-4 1-3.How to Use the Manuals. 1-5 1-4.5725A Instruction Manual. 1-5 1-5.5700A Operator Manual. 1-5 1-6.5700A Operator Reference Guide . 1-5 1-7.5700A Remote Programming Reference Guide. 1-5 1-8.5700A Service Manual. 1-6 1

3、-9.Specifications. 1-6 2Installation. 2-1 2-1.Introduction. 2-3 2-2.Unpacking and Inspection. 2-3 2-3.Service Information. 2-5 2-4.Placement and Rack Mounting. 2-5 2-5.Cooling Considerations. 2-5 2-6.Connecting to the 5700A Calibrator . 2-6 2-7.Selecting Line Voltage. 2-7 2-8.Accessing the Fuse. 2-8

4、 2-9.Connecting to Line Power. 2-9 3Operating Notes. 3-1 3-1.Introduction. 3-3 3-2.Front Panel Features. 3-4 3-3.Rear Panel Features. 3-6 3-4.Turning on the 5725A Amplifier. 3-8 3-5.Warm Up. 3-8 3-6.5725A Operating Functions and Modes. 3-9 3-7.Standby. 3-9 3-8Voltage Standby. 3-10 3-9.Current Standb

5、y. 3-11 3-10.Voltage Operate. 3-12 3-11.Current Operate. 3-13 3-12.Conditions That Activate the 5725A. 3-14 RadioFans.CN 收音机爱 好者资料库 5725A Instruction Manual ii 4Theory of Operation. 4-1 4-1.Introduction. 4-3 4-2.Overall Functional Description. 4-3 4-3.1100V AC Range Functional Description. 4-5 4-4.1

6、1A Range Functional Description. 4-6 4-5.Operation in the 11A DC Range. 4-7 4-6.Operation in the 11A AC Range. 4-7 4-7.Voltage and Current Standby Modes. 4-7 4-8.Voltage Standby. 4-7 4-9.Current Standby. 4-7 4-10.How the 5700A and 5725A Communicate. 4-8 4-11.Description of the Out-Guard Lines (5725A

7、 Side) . 4-8 4-12.Description of the In-Guard Lines. 4-9 4-13.Functional Summaries by Assembly. 4-10 4-14.Detailed Circuit Description . 4-11 4-15.Interconnect Assembly (A1). 4-11 4-16.Power Supply Assembly (A4). 4-12 4-17.High Voltage Supply Section. 4-13 4-18.Switching Section. 4-14 4-19.Current-L

8、imit Section. 4-15 4-20.System Supply Section. 4-15 4-21.Fan Supply Section. 4-16 4-22.Digital Assembly (A5). 4-16 4-23.Microcomputer . 4-16 4-24.External RAM. 4-16 4-25.External ROM. 4-16 4-26.EEROM . 4-18 4-27.Data Latch. 4-18 4-28.Strobe Lines. 4-18 4-29.Led Driver. 4-18 4-30.Optoisolator Link. 4

9、-18 4-31.Break-Detect Circuitry. 4-19 4-32.Power Up and Reset Circuitry. 4-19 4-33.Watchdog Timer. 4-19 4-34.Current Amplifier Assembly (A2). 4-19 4-35.Error Amplifier Section. 4-21 4-36.Output Stage Section. 4-22 4-37.Monitor Section. 4-22 4-38.Control and Switching Section. 4-23 4-39.Power Supply

10、Section. 4-23 4-40.High Voltage Amplifier (A3). 4-24 4-41.Input Amplifier. 4-24 4-42.Integrator. 4-26 4-43.Window Comparator . 4-26 4-44.Input Clamp. 4-26 4-45.Transconductance and Cascode Stage. 4-27 4-46.Midstage . 4-27 4-47.Midstage -400V Filter . 4-27 4-48.High Voltage Heat Sink Assemblies . 4-2

11、7 4-49.Autobias Current Source . 4-28 4-50.Autobias Sense Circuit . 4-28 4-51.High Voltage Amplifier Feedback. 4-29 4-52.Signal Transformers . 4-29 4-53.Temperature Monitoring. 4-29 Contents (continued) iii 4-54.High Voltage Sense Assembly (A6). 4-30 4-55.Sense Amplifier Section. 4-32 4-56.Analog Mo

12、nitor Section . 4-34 4-57.Serial Interface/Guard Crossing Section. 4-35 4-58.Analog Input Switching Section. 4-35 4-59.Control Section. 4-36 4-60.AC Line Voltage Selection Section. 4-37 5Calibration and Verification . 5-1 5-1.Introduction. 5-3 5-2.Where to Find Further Information. 5-3 6Maintenance.

13、 6-1 6-1.Introduction. 6-3 6-2.Replacing the Fuse. 6-3 6-3.Cleaning the Air Filter. 6-4 6-4.General Cleaning. 6-5 6-5.Cleaning PCAs. 6-5 6-6.Access Procedures. 6-6 6-7.Initial Access Procedure . 6-7 6-8.Accessing the Power Supply Assembly (A4). 6-9 6-9.Accessing the Digital Assembly (A5). 6-9 6-10.A

14、ccessing the Current Amplifier Assembly (A2). 6-11 6-11.Accessing the High Voltage Amplifier (A3). 6-12 6-12.Accessing the High Voltage Sense Assembly (A6). 6-13 6-13.Accessing the High Voltage Output Transistors. 6-14 6-14.Accessing the Interconnect Assembly (A1). 6-14 6-15.Enabling Front or Rear B

15、inding Posts. 6-15 7Troubleshooting. 7-1 7-1.Introduction. 7-3 7-2.5725A Fault Codes. 7-3 7-3.Self Diagnostics. 7-3 7-4.Manual Tests for Fault Isolation. 7-6 7-5.Problems 1 or 2: Fault at Power-Up or When Entering Voltage Standby. 7-7 7-6.Problem 3: Fault When Entering Voltage Operate. 7-8 7-7.Probl

16、em 4: Fault When Entering Current Standby. 7-8 7-8.Problem 5: Fault When Entering Current Operate . 7-8 7-9.Reduced-Voltage Troubleshooting Mode. 7-8 7-10.Testing the Power Supply By Itself. 7-9 8List of Replaceable Parts . 8-1 8-1.Introduction. 8-3 8-2.How to Obtain Parts. 8-3 8-3Manual Status Info

17、rmation. 8-3 8-4.Newer Instruments. 8-3 8-5.Service Centers. 8-4 9Schematic Diagrams. 9-1 Index 5725A Instruction Manual iv v List of Tables TableTitlePage 2-1.Standard Equipment. 2-3 2-2.Line Power Cord Types Available from Fluke. 2-4 3-1.Front Panel Features. 3-5 3-2.Rear Panel Features. 3-7 4-1.I

18、nternal Fuse Data. 4-13 4-2.Signal Transformer Usage. 4-29 4-3.High-Quality Reference Name Destination. 4-33 4-4.Signals Monitored by the Analog Monitor Section. 4-34 7-1.5725A Fault Codes. 7-4 7-2.Analog Monitor Faults. 7-7 8-1.Final Assembly. 8-4 8-2.A1 Interconnect PCA. 8-14 8-3.A2 Current Amplifier PCA. 8-16 8-4.A3 High Voltage Amplifier PCA .