Yokogawa DL7100_7200 Service Manual 电路图.pdf

Service Manual Yokogawa Electric Corporation SM 701410-01E SM 701410-01E 3rd Edition Model 7014 DL7100/DL7200 Digital Oscilloscope RadioFans.CN 收音机爱 好者资料库 SM 701410-01E1 IMPORTANT NOTICE TO THE USER This manual contains information for servicing YOKOGAWAs DL7100/DL7200 Series Digital Oscilloscopes. Check the serial number to confirm that this is the correct service manual for the instrument to be serviced. Do not use the wrong manual. Before any maintenance and servicing, read all safety precautions carefully. Only properly trained personnel may carry out maintenance and servicing described in this service manual. Do not disassemble the instrument or its parts, unless otherwise clearly permitted by this service manual. Do not replace any part or assembly, unless otherwise clearly permitted by this service manual. In principle, Yokogawa Electric Corporation (YOKOGAWA) does not supply parts other than those listed in the customer maintenance parts list in this service manual (mainly modules and assemblies). Therefore if an assembly fails, the user should replace the whole assembly and not components within the assembly (see “Note”). If the user attempts to repair the instrument by replacing individual components within the assembly, YOKOGAWA assumes no responsibility for any consequences such as defects in instrument accuracy, functionality, reliability, or user safety hazards. YOKOGAWA does not offer more detailed maintenance and service information than that contained in this service manual. All reasonable efforts have been made to assure the accuracy of the content of this service manual. However, there may still be errors such as clerical errors or omissions. YOKOGAWA assumes no responsibility of any kind concerning the accuracy or contents of this service manual, nor for the consequences of any errors. All rights reserved. No part of this service manual may be reproduced in any form or by any means without the express written prior permission of YOKOGAWA. The contents of this manual are subject to change without notice. Disk No. SM12 3rd Edition : March 2002 (YK) All Rights Reserved, Copyright 1999, Yokogawa Electric Corporation RadioFans.CN 收音机爱 好者资料库 SM 701410-01E2 NOTEYOKOGAWA instruments have been designed in a way that the replacement of elec- tronic parts can be done on an assembly (module) basis by the user. YOKOGAWA instruments have also been designed in a way that troubleshooting and replacement of any faulty assembly can be done easily and quickly. Therefore, YOKOGAWA strongly recommends replacing the entire assembly over replacing parts or components within the assembly. The reasons are as follows: The instruments use high-performance microprocessors, large scale CMOS gate arrays, and surface-mount components to provide state-of-the-art performance and functions. Repair of components can only be performed by specially trained and qualified mainte- nance personnel with special highly-accurate tools, including costly ones. When taking the service life and cost of the instruments into consideration, the replace- ment of assemblies offers the user the possibility to use YOKOGAWA instruments more effectively and economically with a minimum in downtime. Adobe and Acrobat are trademarks of Adobe system incorporated. INTRODUCTION This manual contains information for servicing YOKOGAWA DL7100/DL7200 Series Digital Oscilloscopes. NOTEThis manual is the third edition, March 2002. WARNING This service manual is to be used by properly trained personnel only. To avoid personal injury, do not perform any servicing unless you are qualified to do so. Refer to the safety precautions prior to performing any servicing. Even if servicing is carried out according to this service manual, or by qualified personnel, YOKOGAWA assumes no responsibility for any result occurring from that servicing. SAFETY PRECAUTIONS The following general safety precautions must be observed during all phases of opera- tion, service, and repair of this instrument. Failure to comply with these precautions or with specific warnings given elsewhere in this manual violates safety standards of design, manufacture, and intended use of the instrument. Yokogawa Electric Corporation assumes no liability for the customers failure to comply with these requirements. RadioFans.CN 收音机爱 好者资料库 SM 701410-01E3 General definitions of safety symbols used on equipment and in manuals Explanation: To avoid injury, death of personnel or damage to the instrument, the operator must refer to an explanation in the instruction manual. This symbol represents a functional grounding terminal. Such terminals should not be used as a “protective grounding terminal”. WARNING A WARNING sign denotes a hazard. It calls attention to a procedure, practice, condition or the like, which, if not correctly performed or adhered to, could result in injury or death of personnel. CAUTIONA CAUTION sign denotes a hazard. It calls attention to a procedure, practice, condition or the like, which, if not correctly performed or adhered to, could result in damage to or destruction of part of the product. WARNING Power Supply Ensure the source voltage matches the voltage of the power supply before turning ON the power. Power Cord and Plug To prevent an electric shock or fire, be sure to use the power supply cord supplied by YOKOGAWA. The main power plug must be plugged in an outlet with a protective grounding terminal. Do not invalidate protection by using an extension cord without protective grounding. Protective Grounding The protective grounding terminal must be connected to ground to prevent an electric shock before turning ON the power. Necessity of Protective Grounding Never cut off the internal or external protective grounding wire or disconnect the wiring of the protective grounding terminal. Doing so poses a potential shock hazard. Defects in Protective Grounding or Fuses Do not operate the instrument if you suspect the protective grounding or a fuse might be defective. Fuse To prevent a fire, make sure to use fuses with the specified standard (current, voltage, type). Before replacing the fuses, turn OFF the power and disconnect the power source. Do not use a different fuse or short-circuit the fuse holder. SM 701410-01E4 Do Not Operate Near Flammable Materials Do not operate the instrument in the presence of flammable liquids or vapors. Operation of any electrical instrument in such an environment constitutes a safety hazard. Do Not Remove Any Covers Some areas inside the instrument carry high voltage. Do not remove any cover, especially if the power supply is connected. The cover should be removed by qualified personnel only. External Connection To ground safely, connect the protective grounding before connecting the instrument to a measurement or control unit. HOW TO USE THIS MANUAL This manual is meant to be used by qualified personnel only. Make sure to read the safety precautions at the beginning of this manual as well as the warnings and cautions contained in the chapters relevant to any servicing you may be carrying out. This manual contains the following chapters: 1GENERAL INFORMATION Provides an introduction, and describes safety considerations. 2PERFORMANCE TEST Describes the tests for checking the performance of the instrument. 3ADJUSTMENTS Describes the adjustments which can be performed by users. 4PRINCIPLES OF OPERATION Provides function block diagrams and describes the principles of operation. 5TROUBLESHOOTING Describes procedures for troubleshooting and how to proceed in case parts need to be replaced. 6SCHEMATIC DIAGRAM Provides a system configuration diagram. 7CUSTOMER MAINTENANCE PARTS LIST Contains exploded views and a list of replaceable parts. Specifications are not included in this manual; for specifications, refer to IM 701410- 01E. SM 701410-01E5 1 2 3 4 5 7 6 CONTENTS IMPORTANT NOTICE TO THE USER . 1 INTRODUCTION . 3 SAFETY PRECAUTIONS.3 HOW TO USE THIS MANUAL .4 Chapter 1 GENERAL INFORMATION 1.1 Introduction. 1 - 1 1.2 Safety Considerations . 1 - 1 Chapter 2 PERFORMANCE TEST 2.1 Introduction. 2 - 1 2.2 Test Environment. 2 - 1 2.3 Equipment Required for Performance Test . 2 - 1 2.4 Self_Diagnosis . 2 - 2 2.5 Vertical Axis DC Voltage Accuracy Test. 2 - 2 2.6 Frequency Response Test. 2 - 4 2.7 Time-Base Accuracy Test . 2 - 5 2.8 Trigger Sensitivity Test . 2 - 7 2.9 Trigger Accuracy Test . 2 - 8 2.10 Logic Input Function Test . 2 - 10 Chapter 3 ADJUSTMENTS 3.1 Introduction. 3 - 1 3.2 Test Environment. 3 - 1 3.3 Equipment Required. 3 - 2 3.4 DC Gain Adjustment on the AD board. 3 - 2 3.5Flatness Adjustment on the Analog Board . 3 - 6 Chapter 4 PRINCIPLES OF OPERATION 4.1 Introduction. 4 - 1 4.2 Function of Each Assembly . 4 - 1 4.3 Function of Each ASIC . 4 - 5 Chapter 5 TROUBLESHOOTING 5.1 Introduction. 5 - 1 5.2 Flowchart. 5 - 1 5.3 Power Supply Secondary Voltage . 5 - 5 5.4 Self Test. 5 - 6 5.4.1Key Board Test . 5 - 7 5.4.2 Memory Test . 5 - 7 5.4.3 FDD Test . 5 - 8 5.4.4 SCSI Test . 5 - 8 5.4.5 Printer Test. 5 - 9 5.4.6 Accuracy Test. 5 - 10 5.4.7 PC Card Test (Option). 5 - 10 Chapter 6 SCHEMATIC DIAGRAM Chapter 7 CUSTOMER MAINTENANCE PARTS LIST 7.1 Customer Maintenance Parts List . 7 - 1 7.2 Standard Accessories. 7 - 4 1 GENERAL INFORMATION 1 - 1 SM 701410-01E 1.1 Introduction Chapter 1 GENERAL INFORMATION This chapter provides the general information. 1.1 Introduction 1.2 Safety Considerations 1.1 Introduction This manual describes servicing information on any YOKOGAWA DL7100/DL7200 Series Digital Oscilloscopes. This chapter contains information required for using this manual and information that must be read before starting servicing of DL7100/DL7200 series instruments. 1.2 Safety Considerations You must thoroughly read the safety precautions at the beginning of this manual. Also fully read the warnings and cautions contained in each chapter. SM 701410-01E2 - 1 PERFORMANCE TEST 2 2.1 Introduction Chapter 2 PERFORMANCE TEST Contents of This Chapter 2.1 Introduction 2.2 Test Environment 2.3 Equipment Required 2.4 Self-Diagnosis 2.5 Vertical Axis DC Voltage Accuracy Test 2.6 Frequency Response Test 2.7 Time-Base Accuracy Test 2.8 Trigger Sensitivity Test 2.9 Trigger Accuracy Test 2.10 Logic Input Function Test 2.1 Introduction The aim of the test is to check the basic performance of the instrument. The order of the test procedures is just for convenience and does not have any significant meaning. Please use recommended equipment or their equivalents. 2.2 Test Environment 1) Operate the instrument under the following conditions. Ambient temperature:23 2 C Humidity:55 10% RH Voltage of power supply:Specified voltage 1% Frequency of power supply:Specified frequency 1% 2) Warm up time More than 30 minutes after turning ON the instrument. Confirm that self-calibration is correctly executed after the 30 minute warm up. (Be sure to Pay attention to the warm up time of all equipment that will be used in the test.) 2.3 Equipment Required for Performance Test EquipmentQtyMandatory SpecificationsRecommended Calibrator1Accuracy 0.05%WAVETEK 9500 Output voltage 40 V to 40 V Output resolution 1 mV Output frequency range 0.1 MHz to 500 MHz Programmable head1WAVETEK 9520 SM 701410-01E2 - 2 2.4 Self_Diagnosis Equipment Required None Procedure Follow the procedure described in section 14.3, “Self-Diagnosis Test (Self-Test)” of the instruction manual (IM 701410-01E) . 2.5 Vertical Axis DC Voltage Accuracy Test Specifications 2 mV/div to 50 mV/div:(1.5% of 8 div.+0.2 mV) 100 mV/div to 500 mV/div: (1.5% of 8 div.+2 mV) 1 V/div to 10 V/div:(1.5% of 8 div.+20 mV) Permissible Range RangeTolerance 2 mV/div0.44 mV 5 mV/div0.8 mV 10 mV/div1.4 mV 20 mV/div2.6 mV 50 mV/div6.2 mV 100 mV/div14 mV 200 mV/div26 mV 500 mV/div62 mV 1 V/div140 mV 2 V/div260 mV 5 V/div620 mV 10 V/div1.22 V Equipment Required EquipmentQtyMandatory SpecificationsRecommended Calibrator1Accuracy