Tektronix TLS 216 Service Manual

Service Manual

TLS 216 Logic Scope

070-8831-02

This document applies for firmware version 1.00 and above.

Warning

The servicing instructions are for use by qualified personnel only. To avoid personal injury, do not perform any servicing unless you are qualified to do so. Refer to the Safety Summary prior to performing service.

Copyright  T ektronix, Inc. All rights reserved. Licensed software products are owned by Tektronix or its suppliers and are protected by United States copyright laws and international treaty provisions.

Use, duplication, or disclosure by the Government is subject to restrictions as set forth in subparagraph (c)(1)(ii) of the Rights in T echnical Data and Computer Software clause at DFARS 252.227-7013, or subparagraphs (c)(1) and (2) of the Commercial Computer Software – Restricted Rights clause at F AR 52.227-19, as applicable.

T ektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes that in all previously published material. Specifications and price change privileges reserved.

Printed in the U.S.A. T ektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070–1000 TEKTRONIX and TEK are registered trademarks of T ektronix, Inc. BusForm, GURU, and QUICKCLIP are trademarks of T ektronix, Inc.

TLS 216 WARRANTY

T ektronix warrants that this product will be free from defects in materials and workmanship for a period of three (3) years from the date of shipment. If any such product proves defective during this warranty period, T ektronix, at its option, either will repair the defective product without charge for parts and labor, or will provide a replacement in exchange for the defective product.

In order to obtain service under this warranty, Customer must notify Tektronix of the defect before the expiration of the warranty period and make suitable arrangements for the performance of service. Customer shall be responsible for packaging and shipping the defective product to the service center designated by T ektronix, with shipping charges prepaid. T ektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the T ektronix service center is located. Customer shall be responsible for paying all shipping charges, duties, taxes, and any other charges for products returned to any other locations.

This warranty shall not apply to any defect, failure or damage caused by improper use or improper or inadequate maintenance and care. T ektronix shall not be obligated to furnish service under this warranty a) to repair damage resulting from attempts by personnel other than T ektronix representatives to install, repair or service the product; b) to repair damage resulting from improper use or connection to incompatible equipment; or c) to service a product that has been modified or integrated with other products when the effect of such modification or integration increases the time or difficulty of servicing the product.

THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THIS PRODUCT IN LIEU OF ANY OTHER WARRANTIES, EXPRESSED OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. TEKTRONIX’ RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO THE CUST OMER FOR BREACH OF THIS WARRANTY. TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT , SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.

P6240 WARRANTY

T ektronix warrants that this product will be free from defects in materials and workmanship for a period of one (1) year from the date of shipment. If any such product proves defective during this warranty period, T ektronix, at its option, either will repair the defective product without charge for parts and labor, or will provide a replacement in exchange for the defective product.

Specification

List of Figures vi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

List of Tables ix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Service Safety Summary xi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Preface xiii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Manual Structure xiii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Conventions xiv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Modules xiv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Safety xiv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Symbols xiv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating Instructions xiv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Related Manuals xv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Introduction xvii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Before Servicing xvii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Strategy for Servicing xvii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

T ektronix Service xviii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Warranty Repair Service xviii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Repair or Calibration Service xviii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Self Service xix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating Information

Product Description 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Warranted Characteristics 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Typical Characteristics 1–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Nominal Traits 1–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installation 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Supplying Operating Power 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Power Cord Information 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating Voltage 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Memory Backup Power 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating Environment 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating T emperature 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Ventilation Requirements 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Applying and Interrupting Power 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Power On 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Power Off 2–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Repackaging Instructions 2–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

General Operating Instructions 2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Screen Layout 2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Basic Procedures 2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TLS 216 Service Manual

Table of Contents

How to Power On 2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

How to Use Help 2–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

How to Display Logic Scope Status 2–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

How to Reset the Logic Scope 2–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

How to Set Functions from the Front Panel 2–9. . . . . . . . . . . . . . . . . . . . . . . . .

How to Set Functions from Menus 2–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

How to Set Complex Functions 2–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating Instructions for Waveform Groups 2–15. . . . . . . . . . . . . . . . . . .

Vertical Readout 2–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

How to Adjust the Vertical Setup 2–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

T o Scale and Position Waveform Groups 2–17. . . . . . . . . . . . . . . . . . . . . . . . . . .

T o Set Up from the Vertical Controls Menu 2–17. . . . . . . . . . . . . . . . . . . . . . . . .

How to Select Groups and Channels 2–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

T o Select a Group 2–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

T o Select a Channel 2–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

T o Remove a Group from the Display 2–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

How to Create a Waveform Group 2–20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

T o Define a Group 2–21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

T o Delete a Group 2–21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

How to Choose the Group Display Mode 2–22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

T o Select a Group Mode 2–23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

T o Display Only the Selected Channel 2–23. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

T o Define Group Thresholds and Height 2–24. . . . . . . . . . . . . . . . . . . . . . . . . . .

T o Remove a Group from the Display 2–24. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

T o Find More Information 2–24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Theory of Operation

Circuit Description 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Logic Conventions 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Module Overview 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Performance Verification

Introduction 4–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Option 1S 4–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating Information 4–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Conventions 4–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Brief Procedures 4–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Self Tests 4–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Functional T ests 4–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Performance Tests 4–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Preparation: Clear Probe Calibrations 4–24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Verify Internal Adjustment, Self Calibration, and Diagnostics 4–5. . . . . . . . . .

Verify Probe Function and Calibration 4–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Verify All Input Channels 4–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Verify the Time Base 4–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Verify the Main and Delayed Trigger Systems 4–11. . . . . . . . . . . . . . . . . . . . . . .

Verify the File System 4–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Prerequisites 4–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Equipment Required 4–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

T est Record 4–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TLS 216 Service Manual

Adjustment Procedures

Table of Contents

Signal Acquisition System Checks 4–25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Check Accuracy of Offset (Zero Setting) 4–25. . . . . . . . . . . . . . . . . . . . . . . . . . .

Check DC Gain and Voltage Measurement Accuracy 4–26. . . . . . . . . . . . . . . . .

Check Analog Bandwidth 4–31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Check Delay Between Channels 4–34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Time Base System Check 4–36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Check Accuracy for Long-T erm Sample Rate, Delay Time, and Delta Time

Measurements 4–36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Trigger System Checks 4–39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Check Accuracy for Logic Triggering 4–39. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Check Accuracy, T rigger Threshold 4–43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Sensitivity, Edge Trigger 4–45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output Signal Checks 4–51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Check Outputs — Probe Compensator 4–51. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Check Outputs — Main and Delayed Trigger 4–53. . . . . . . . . . . . . . . . . . . . . . .

Adjustment Procedures 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Requirements for Performance 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Personnel 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Warm-Up Period 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Access 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

System 5–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Optional Peripherals 5–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

T est Equipment 5–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Usage 5–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Performing the Adjustments 5–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Complete Adjustment 5–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Individual Adjustments 5–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Partial Adjustment 5–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Adjustment After Repair 5–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Adjustment Dependencies 5–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Equipment Required 5–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Adjustment Instructions 5–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Hardware Installation 5–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Software Installation 5–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Software-Based Adjustments 5–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Display Assembly Adjustment 5–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Rotation, Brightness, and Contrast Adjustment 5–9. . . . . . . . . . . . . . . . . . . . . .

Maintenance

TLS 216 Service Manual

Maintenance Information 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Procedures Not In This Section 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Preventing ESD 6–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Precautions 6–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Susceptibility to ESD 6–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Inspection and Cleaning 6–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

General Care 6–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Inspection and Cleaning Procedures 6–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

iii

Table of Contents

Inspection — Exterior 6–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cleaning Procedure — Exterior 6–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Inspection — Interior 6–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cleaning Procedure — Interior 6–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lubrication 6–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Removal and Installation Procedures 6–9. . . . . . . . . . . . . . . . . . . . . . . . . .

Preparation — Please Read 6–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

List of Modules 6–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

General Instructions 6–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Summary of Procedures 6–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Equipment Required 6–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Access Procedure 6–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Procedures for External Modules 6–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Front-Panel Knobs 6–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Line Fuse and Line Cord 6–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

EMI Gaskets 6–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Rear Cover and Cabinet 6–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Front Cover, T rim Ring, Menu Buttons, and Input Panel 6–21. . . . . . . . . . . . . . .

A12 Front-Panel Assembly and Probe Calibrator 6–23. . . . . . . . . . . . . . . . . . . .

Display-Frame Assembly 6–26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cabinet Modules 6–26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Procedures for Outer-Chassis Modules 6–29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input Cable Assembly 6–29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Probe Flex Circuit Replacement 6–31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Fan 6–33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A14 D1 Bus and Analog-Power and Digital-Power Cables 6–33. . . . . . . . . . . . .

A23 SerPar Assembly 6–35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A11 Processor/Display Board 6–37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

T op Cover and Board Brackets 6–39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Rear-Panel Cables 6–40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A10 Acquisition Board 6–41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Floppy Disk 6–42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Rear Chassis 6–45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Procedures for Inner-Chassis Modules 6–46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A16 Low Voltage Power Supply 6–47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A30 Display Assembly and Supply Fuse 6–48. . . . . . . . . . . . . . . . . . . . . . . . . . .

Front Subpanel 6–52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Main Chassis 6–54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Disassembly for Cleaning 6–54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Troubleshooting 6–57. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Diagnostics 6–57. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Firmware Updates 6–58. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Troubleshooting Procedures 6–59. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Options

Options and Accessories 7–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Options 7–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TLS 216 Service Manual

Electrical Parts List

Diagrams

Table of Contents

Options A1–A5: International Power Cords 7–1. . . . . . . . . . . . . . . . . . . . . . . . .

Option B1: Service Manual 7–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Option 1B: Coaxial Adapter Set 7–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Option 1K: K420 Instrument Cart 7–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Warranty-Plus Service Options 7–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Option 1P: HC100 4 Pen Plotter 7–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Option 1R: Rackmounted Logic Scope 7–2. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Option 2P: Phaser 200e Color Printer 7–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Option 9C: Certificate of Calibration and T est Data Report 7–2. . . . . . . . . . . . .

Standard Accessories 7–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Optional Accessories 7–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Accessory Software 7–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Warranty Information 7–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electrical Parts List 8–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Diagrams 9–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Symbols 9–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Mechanical Parts List

Replaceable Parts List 10–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Parts Ordering Information 10–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Using the Replaceable Parts List 10–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TLS 216 Service Manual

Table of Contents

List of Figures

Figure 2–1: Map of Display Functions 2–8. . . . . . . . . . . . . . . . . . . . . . . . .

Figure 2–2: Vertical Readout Displaying Two Group Readouts 2–15. . . . .

Figure 2–3: The Vertical Readout and Vertical Controls Menu 2–17. . . . .

Figure 2–4: Groups — Valid and Invalid 2–20. . . . . . . . . . . . . . . . . . . . . . .

Figure 2–5: Display Modes 2–22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–1: Map of Display Functions 4–3. . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–2: Verifying Adjustments and Signal-Path

Compensation 4–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–3: Test Hookup for Functional Tests 4–8. . . . . . . . . . . . . . . . . . .

Figure 4–4: Square Wave Calibration and DC Baseline Signals 4–9. . . .

Figure 4–5: Measurement of DC Offset Accuracy at Zero Setting 4–26. . .

Figure 4–6: Test Hookup for DC Gain and Accuracy Tests 4–27. . . . . . . .

Figure 4–7: Measurement of DC Gain Accuracy 4–28. . . . . . . . . . . . . . . . .

Figure 4–8: Measurement of DC Accuracy 4–30. . . . . . . . . . . . . . . . . . . . . .

Figure 4–9: Test Hookup for Analog Bandwidth Test 4–32. . . . . . . . . . . . .

Figure 4–10: Measurement of Analog Bandwidth 4–33. . . . . . . . . . . . . . . .

Figure 4–11: Test Hookup for Channel Delay Test 4–34. . . . . . . . . . . . . . . .

Figure 4–12: Measurement of Channel Delay 4–35. . . . . . . . . . . . . . . . . . .

Figure 4–13: Test Hookup for Time Base System Check 4–37. . . . . . . . . . .

Figure 4–14: Measurement of Accuracy — Long-Term and

Delay Time 4–38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–15: Test Hookup for Logic Trigger Check 4–40. . . . . . . . . . . . . .

Figure 4–16: Test Hookup for Trigger Threshold Check 4–43. . . . . . . . . .

Figure 4–17: Measurement of Trigger-Level Accuracy 4–45. . . . . . . . . . . .

Figure 4–18: Test Hookup for Main Edge Trigger Sensitivity

Checks 4–46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–19: Measurement of Trigger Sensitivity 4–48. . . . . . . . . . . . . . . .

Figure 4–20: Test Hookup for AUX TRIGGER Input Sensitivity

Check 4–49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 4–21: Test Hookup for Probe Compensator Check 4–51. . . . . . . . .

Figure 4–22: Measurement of Probe Compensator Limits 4–52. . . . . . . . .

Figure 4–23: Test Hookup for Main Trigger Output Check 4–53. . . . . . . .

Figure 4–24: Measurement of Main Trigger Output Limits 4–54. . . . . . . .

Figure 5–1: Accessing the Protection Switch 5–8. . . . . . . . . . . . . . . . . . . .

Figure 5–2: Five and Ten Percent Luminance Patches 5–10. . . . . . . . . . . .

Figure 6–1: External Modules 6–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TLS 216 Service Manual

Table of Contents

Figure 6–2: Outer-Chassis Modules 6–13. . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–3: Inner-Chassis Modules 6–14. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–4: Knob Removal 6–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–5: Line Fuse and Line Cord Removal 6–18. . . . . . . . . . . . . . . . . .

Figure 6–6: Rear Cover and Cabinet Removal 6–21. . . . . . . . . . . . . . . . . .

Figure 6–7: Front Cover, Trim Ring, Menu Buttons, and Input Panel

Removal (Front Cover not Shown) 6–22. . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–8: A12 Front-Panel Assembly Removal 6–24. . . . . . . . . . . . . . . . .

Figure 6–9: Disassembly of Front-Panel Assembly 6–25. . . . . . . . . . . . . . .

Figure 6–10: Cabinet Modules Removal 6–28. . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–11: Input Cable Assembly Routing 6–30. . . . . . . . . . . . . . . . . . . .

Figure 6–12: Cable Tie Removal for New Installations 6–31. . . . . . . . . . . .

Figure 6–13: A14 D1 Bus and Analog-Power and Digital-Power Cables

Removal 6–34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–14: Circuit Board Assembly Removal 6–35. . . . . . . . . . . . . . . . . .

Figure 6–15: Remove Circuit Board From Assembly 6–36. . . . . . . . . . . . .

Figure 6–16: A11 Processor/Display Removal 6–38. . . . . . . . . . . . . . . . . . .

Figure 6–17: Board Bracket Removal 6–39. . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–18: A10 Acquisition Board Removal 6–42. . . . . . . . . . . . . . . . . . .

Figure 6–19: Floppy Disk Removal 6–44. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–20: Rear Chassis Removal 6–46. . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–21: A16 Low Voltage Power Supply Removal 6–48. . . . . . . . . . .

Figure 6–22: Display Assembly Removal 6–50. . . . . . . . . . . . . . . . . . . . . . .

Figure 6–23: Display-Driver Board Removal 6–51. . . . . . . . . . . . . . . . . . . .

Figure 6–24: Front Subpanel Removal 6–53. . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–25: Accessing the Protection Switch 6–58. . . . . . . . . . . . . . . . . . .

Figure 6–26: Primary Troubleshooting Procedure 6–60. . . . . . . . . . . . . . .

Figure 6–27: Module Isolation Troubleshooting Procedure 6–62. . . . . . . .

Figure 6–28: Power Supply Voltage Measurement Locations 6–63. . . . . . .

Figure 6–29: A16 Low Voltage Power Supply Module Isolation

Troubleshooting Procedure 6–64. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–30: Display Troubleshooting Procedure 6–66. . . . . . . . . . . . . . . .

Figure 6–31: Horizontal and Vertical Sync Signals 6–67. . . . . . . . . . . . . . .

Figure 6–32: A Video Signal with White, Black, and Blanking Levels 6–67

Figure 6–33: Processor/Acquisition Troubleshooting Procedure 6–68. . . .

Figure 6–34: Processor/Front Panel Troubleshooting Procedure 6–69. . . .

Figure 6–35: Acquisition Troubleshooting Procedure 6–70. . . . . . . . . . . . .

Figure 6–36: Acquisition Troubleshooting Procedure (Cont.) 6–71. . . . . .

TLS 216 Service Manual

vii

Table of Contents

Figure 6–37: A11 DRAM Processor/Display Module

(View of Right Side) 6–72. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–38: A11 DRAM Processor/Display Module

(View of Upper Left Corner) 6–73. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 6–39: A11 DRAM Processor/Display Module

(View of Lower Left Corner) 6–74. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 9–1: TLS 216 Block Diagram 9–2. . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 9–2: TLS 216 Interconnect Diagram 9–4. . . . . . . . . . . . . . . . . . . . .

Figure 10–1: Cabinet and Front Panel 10–5. . . . . . . . . . . . . . . . . . . . . . . . .

Figure 10–2: Outer-Chassis Modules 10–7. . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 10–3: Inner-Chassis Modules 10–8. . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 10–4: Floppy Disk 10–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 10–5: Cabling 10–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figure 10–6: Accessories 10–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

viii

TLS 216 Service Manual

List of Tables

Table of Contents

Table 1–1: Warranted Characteristics: Input System 1–3. . . . . . . . . . . .

Table 1–2: Warranted Characteristics: Signal Acquisition System 1–3. .

Table 1–3: Warranted Characteristics: Time Base System 1–5. . . . . . . .

Table 1–4: Warranted Characteristics: Triggering System 1–5. . . . . . . .

Table 1–5: Warranted Characteristics: Output Ports and Power

Distribution System 1–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–6: Warranted Characteristics: Environmental 1–6. . . . . . . . . . .

Table 1–7: Typical Characteristics: Input System 1–9. . . . . . . . . . . . . . . .

Table 1–8: Typical Characteristics: Signal Acquisition System 1–9. . . . .

Table 1–9: Typical Characteristics: Triggering System 1–10. . . . . . . . . . .

Table 1–10: Typical Characteristics: Display and Data Handling

Systems 1–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 1–11: Typical Characteristics: Operating Environment 1–11. . . . .

Table 1–12: Nominal Traits: Input System 1–13. . . . . . . . . . . . . . . . . . . . .

Table 1–13: Nominal Traits: Signal Acquisition System 1–13. . . . . . . . . . .

Table 1–14: Nominal Traits: Time Base System 1–14. . . . . . . . . . . . . . . . .

Table 1–15: Nominal Traits: Triggering System 1–14. . . . . . . . . . . . . . . . .

Table 1–16: Nominal Traits: Display System 1–14. . . . . . . . . . . . . . . . . . . .

Table 1–17: Nominal Traits: GPIB Interface and Output Ports 1–14. . . .

Table 1–18: Nominal Traits: Fuse Rating 1–15. . . . . . . . . . . . . . . . . . . . . . .

Table 1–19: Nominal Traits: Mechanical 1–15. . . . . . . . . . . . . . . . . . . . . . .

Table 2–1: Power-Cord Conductor Identification 2–2. . . . . . . . . . . . . . . .

Table 2–2: Power Cord Identification 2–3. . . . . . . . . . . . . . . . . . . . . . . . .

Table 2–3: Effects of Corrupted Data 2–5. . . . . . . . . . . . . . . . . . . . . . . . . .

Table 4–1: Test Equipment 4–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 4–2: DC Accuracy 4–30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 4–3: Settings For Logic Trigger Accuracy Checks 4–40. . . . . . . . . .

Table 5–1: Calibration Tests 5–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 5–2: Adjustments Required for Module Replaced 5–4. . . . . . . . . .

Table 5–3: Adjustments and Dependencies 5–4. . . . . . . . . . . . . . . . . . . . .

Table 5–4: Test Equipment, Fixtures, and Supplies 5–4. . . . . . . . . . . . . .

Table 5–5: GPIB Board Configuration 5–6. . . . . . . . . . . . . . . . . . . . . . . . .

Table 6–1: Relative Susceptibility to Static-Discharge Damage 6–2. . . . .

Table 6–2: External Inspection Check List 6–6. . . . . . . . . . . . . . . . . . . . .

Table 6–3: Internal Inspection Check List 6–6. . . . . . . . . . . . . . . . . . . . . .

TLS 216 Service Manual

Table of Contents

Table 6–4: Tools Required for Module Removal 6–11. . . . . . . . . . . . . . . . .

Table 6–5: Normal Supply Voltages (Measured on J26 and J27 on the

A11 DRAM Processor/Display Module) 6–63. . . . . . . . . . . . . . . . . . . .

Table 6–6: No-Load Supply Voltages (Measured on J5 and J6 on the

A16 Low Voltage Power Supply Module) 6–63. . . . . . . . . . . . . . . . . . .

Table 7–1: International Power Cords 7–1. . . . . . . . . . . . . . . . . . . . . . . . .

Table 7–2: Standard Accessories 7–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 7–3: Optional Accessories 7–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 7–4: Accessory Software 7–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TLS 216 Service Manual

Service Safety Summary

Only qualified personnel should perform service procedures. Read this Service Safety Summary and the General Safety Summary before performing any service

procedures.

Do Not Service Alone

Disconnect Power

Use Caution When

Servicing the CRT

Use Care When Servicing

With Power On

Do not perform internal service or adjustments of this product unless another person capable of rendering first aid and resuscitation is present.

To avoid electric shock, disconnect the main power by means of the power cord or, if provided, the power switch.

To avoid electric shock or injury, use extreme caution when handling the CRT. Only qualified personnel familiar with CRT servicing procedures and precautions should remove or install the CRT.

CRTs retain hazardous voltages for long periods of time after power is turned off. Before attempting any servicing, discharge the CRT by shorting the anode to chassis ground. When discharging the CRT, connect the discharge path to ground and then the anode. Rough handling may cause the CRT to implode. Do not nick or scratch the glass or subject it to undue pressure when removing or installing it. When handling the CRT, wear safety goggles and heavy gloves for protection.

Dangerous voltages or currents may exist in this product. Disconnect power, remove battery (if applicable), and disconnect test leads before removing protective panels, soldering, or replacing components.

X-Radiation

TLS 216 Service Manual

To avoid electric shock, do not touch exposed connections.

To avoid x-radiation exposure, do not modify or otherwise alter the high-voltage circuitry or the CRT enclosure. X-ray emissions generated within this product have been sufficiently shielded.

Service Safety Summary

xii

TLS 216 Service Manual

Preface

Manual Structure

This is the Service Manual for the TLS 216 Logic Scope. Before using this manual to service the logic scope, please read all topics in this preface. Also, read the introduction that follows this preface, as it describes the strategy (module replacement) used to service this product.

This manual is divided into sections, such as Specifications and Theory of Operation. Further, it is divided into subsections, such as Product Description and Removal and Installation Procedures.

The following is a brief description of each manual section. H Specifications — contains a product description of the logic scope and

tables of the characteristics and descriptions that apply to it.

H Operating Information — includes installation and operating instructions

at the level needed to safely power on and service this logic scope. Instructions for shipment of the logic scope are also found in this section.

H Theory of Operation — contains circuit descriptions that support general

service and fault isolation.

H Performance Verification — contains a collection of procedures for

confirming that this logic scope functions properly and meets warranted limits.

H Adjustment Procedures — contains a collection of procedures for adjusting

this Logic Scope to meet warranted limits.

H Maintenance — contains information and procedures for doing preventive

and corrective maintenance of this logic scope. Instructions for cleaning, for module removal and installation, and for fault isolation to a module are found here.

H Options — contains information on servicing any of the factory-installed

options that may be present in your logic scope.

H Electrical Parts List — contains a statement referring you to Replaceable

Parts, where both electrical and mechanical modules are listed. See below.

H Diagrams — contains a block diagram and an interconnection diagram

useful for isolating failed modules.

TLS 216 Service Manual

xiii

Preface

Conventions

H Mechanical Parts List — includes a table of all replaceable modules, their

descriptions, and their Tektronix part numbers.

This manual uses certain conventions which you should become familiar with before doing service.

Modules

Safety

Symbols

This manual refers to any replaceable component, assembly, or part of this logic scope generically as a module. In general, a module is an assembly, like a circuit board, rather than a component, like a resistor or an integrated circuit. Sometimes a single component is a module; for example, each chassis part of the logic scope is a module.

Symbols and terms related to safety appear in the Safety Summary found at the beginning of this manual.

Besides the symbols related to safety, this manual uses the following symbols:

STOP. The STOP label appears with information that must be read in order to correctly do service and to avoid incorrectly using or applying service procedures.

The clock icon labels procedure steps which require a pause to wait for the logic scope to complete some operation before you can continue.

Various icons such as the example icon at the left are used in procedures to help identify certain readouts and menu functions on screen.

Operating Instructions

xiv

Throughout this manual, you will find various procedures which contain steps of instructions for you to perform. To keep those instructions clear and consistent, this manual uses the following conventions:

H Names of front-panel controls and menu labels appear in boldface print. H Names also appear in the same case (initial capitals, all uppercase, etc.) in

the manual as is used on the logic scope front panel and menus. Front panel

names are all upper case letters, for example, GROUP MENU and

GROUP 1. H Instruction steps are numbered. The number is omitted if there is only one

step.

TLS 216 Service Manual

Preface

H When steps require that you make a sequence of selections using front-panel

controls and menu buttons, an arrow ( ➞ front panel button and a menu, or between menus. Also, whether a name is a main menu or side menu item is clearly indicated: Press HORIZONTAL

MENU Trigger Position (main) ➞ Set to 20% (side).

Using the convention just described results in instructions that are graphically intuitive and simplifies procedures. For example, the instruction just given replaces these five steps:

1. Press the front-panel button HORIZONTAL MENU.

2. Press the main menu button Record Length.

3. Press the side menu button 500 points in 10 divs.

4. Press the main menu button Trigger Position

5. Press the side menu button Set to 20%

➞ Record Length (main) ➞ 500 points in 10 divs (side) ➞

) marks each transition between a

Related Manuals

Sometimes you may have to make a selection from a popup menu: Press

TRIGGER MENU

repeatedly press the main menu button Type until Edge is highlighted in the pop-up menu.

The following documents are related to the use or service of the logic scope. The TLS 216 User Manual contains a tutorial to quickly show you how to

operate the logic scope and an in depth discussion of how to more completely use its features. Applications are also discussed.

The TLS 216 Programmer Manual (Tektronix part number 070-8835-00) describes using a computer to control the logic scope through the GPIB interface.

The TLS 216 Reference (Tektronix part number 070-8833-00) gives you a quick overview of how to operate your logic scope.

➞ Type (main) ➞ Edge (pop-up). In this example, you

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Preface

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TLS 216 Service Manual

Introduction

Before Servicing

This introduction describes what you should do before attempting servicing of the TLS 216 Logic Scope, outlines the strategy for servicing that this manual supports, and lists service that you can obtain from Tektronix.

This manual is for servicing the TLS 216 Logic Scope. To prevent injury to yourself or damage to the logic scope, do the following before you attempt service:

H Be sure you are a qualified service person; H Read the Safety Summary and Preface found at the beginning of this manual; H Read Strategy for Servicing, below, and Installation in Section 2.

When using this manual for servicing, be sure to heed all warnings, cautions, and notes.

When performing any procedure, be sure to read any introduction it may provide. These introductions provide information needed to do the service safely, correctly, and efficiently.

Strategy for Servicing

TLS 216 Service Manual

NOTE. Throughout this manual, any field-replaceable component, assembly, or part of this logic scope is referred to generically as a module.

This manual contains all the information needed for periodic maintenance of the logic scope. (Examples of such information are procedures for checking performance and for readjustment.) Further, it contains all information for corrective maintenance down to the module level. This means that the procedures, diagrams, and other troubleshooting aids help isolate failures to a specific module, rather than to components of that module. Once a failure is isolated, replace the module with a fresh unit obtained from the factory.

All modules are listed in Section 10, Mechanical Parts List. To isolate a failure to a module, use the fault isolation procedures found in Section 6, Maintenance

Information. To remove and replace any failed module, follow the instructions in Removal and Installation Procedures, also found in Section 6.

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Introduction

Tektronix Service

Tektronix provides service to cover repair under warranty as well as other services that may provide a cost-effective answer to your service needs.

Whether providing warranty repair service or any of the other services listed below, Tektronix service technicians, trained on Tektronix products, are best equipped to service your logic scope. Tektronix technicians are appraised of the latest information on improvements to the product as well as the latest new options to the product.

Warranty Repair Service

Repair or Calibration

Service

Tektronix warrants this product for three years from date of purchase, excluding probes for which the warranty is one year. (The warranties appear following the title page and copyright page near the front of this manual.) Tektronix technicians provide warranty service at most Tektronix service locations worldwide. Your Tektronix product catalog lists all service locations worldwide.

The following services may be purchased to tailor repair and/or calibration of your TLS 216 Logic Scope to fit your requirements.

Option 9C. When you order your TLS 216 Logic Scope with Option 9C, it is shipped with a Certificate of Calibration and Test Data Report. This certificate provides traceability to the National Institute of Standards and Technology (NIST). It certifies procedures used to calibrate the logic scope comply with U. S. Military Standard 45662A.

At-Depot Service. Tektronix offers several standard-priced adjustment (calibration) and repair services:

H A single repair and/or adjustment. H Calibrations using equipment and procedures that meet the traceability

standards specific to the local area.

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H Annual maintenance agreements that provide for either calibration and repair

or calibration only of the logic scope. Of these services, the annual maintenance agreement offers a particularly

cost-effective approach to service for many owners of the TLS 216 Logic Scope. Such agreements can be purchased to span several years.

On-Site Service. The annual maintenance agreement can be purchased with on-site service, with repair and calibration done at your facility. This service reduces the time your logic scope is out of service when calibration or repair is required.

TLS 216 Service Manual

Introduction

Self Service

Tektronix supports repair to the module level by providing Module Exchange and Module Repair and Return.

Module Exchange. This service reduces down time for repair by allowing you to exchange most modules for remanufactured ones. Tektronix ships you an updated and tested exchange module from the Beaverton, Oregon service center, typically within 24 hours. Each module comes with a 90-day service warranty.

Module Repair and Return. This service returns to you within 10 days the same module that you shipped to Tektronix. The module shipped is repaired, tested, and returned to you from the Beaverton, Oregon service center. It is not updated to match current modules of the same type. Again, each module comes with a 90-day service warranty.

For More Information. Contact your local Tektronix service center or sales engineer for more information on any of the repair or adjustment services just described.

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Introduction

TLS 216 Service Manual

Performance Verification

Product Description

The Tektronix TLS 216 Logic Scope is a superb tool for analyzing and debugging digital circuits. Its performance addresses the needs of digital designers and troubleshooters of such circuits with the following features:

H sixteen channels, equipped with sixteen 2.5 pF FET probes, for acquiring

waveforms from digital circuits

H three display modes — displays analog waveforms, digital BusForms, and

dual-threshold timing diagrams

H four threshold level presets based on four logic families, TTL, CMOS,

+ECL, and –ECL, for deriving digital levels for BusForm diagram displays

H five trigger types — Edge, Pulse, Pattern, State, and Sequence H 500 MHz maximum bandwidth, a 2 Gigasamples/second maximum

digitizing rate, eight-bit digitizers, and up to a 2,000-sample record length per channel

H full GPIB software programmability and hardcopy output using GPIB,

RS-232, or Centronics ports

H complete measurement and documentation capability H intuitive operation using graphic icons and the more familiar and traditional

horizontal and vertical knobs

H on-line help at the touch of a button

and timing

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Product Description

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TLS 216 Service Manual

W arranted Characteristics

This subsection lists the various warranted characteristics that describe the

TLS 216, including both electrical and environmental characteristics.

Warranted characteristics are quantifiable performance limits that are warranted.

NOTE. In these tables, those warranted characteristics that are checked (either directly or indirectly) in the Performance Verification, found in Section 1, appear in boldface type under the column Name.

Performance Conditions

The electrical characteristics found in these tables of warranted characteristics apply when the +20_ C and +30_ C, has had a warm-up period of at least 20 minutes, and is operating at an ambient temperature between +4_ C and +50_ C (unless otherwise noted), and has passed both the signal path compensation and probe calibration routines.

TLS 216 has been adjusted at an ambient temperature between

T able 1–1: Warranted Characteristics: Input System

Name Description Input Resistance with Coaxial Adapter 50  ±1%

Input Resistance with P6240 Probe 1 M ±15% at DC Input Dynamic Range with Coaxial Adapter ±5 V (DC + Peak AC). Input Dynamic Range with P6240 Probe +15 V to –12 V (DC + Peak AC). Maximum Input Voltage with Coaxial Adapter ±5 V (DC + Peak AC). Maximum Input Voltage with P6240 Probe ±25 V (DC + Peak AC). Maximum Input Voltage (Instrument Front Panel) ±5 V (DC + Peak AC).

T able 1–2: W arranted Characteristics: Signal Acquisition System

Name Description DC Gain Accuracy with P6240 Probe ±1.5% for time base settings of 50 mV/Div to 2 V/Div. DC Gain Accuracy with Coaxial Adapter ±4.0% for time base settings of 50 mV/Div to 2 V/Div.

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Warranted Characteristics

T able 1–2: W arranted Characteristics: Signal Acquisition System (Cont.)

Name Description DC Voltage Measurement Accuracy, Averaged, with

Coaxial Adapter

DC Voltage Measurement Accuracy, Averaged, with P6240 Probe

DC Voltage Measurement Accuracy, Not Averaged, with Coaxial Adapter

DC Voltage Measurement Accuracy, Not Averaged, with P6240 Probe

Offset Accuracy V/Div Setting Offset Accuracy

For an average of 16 waveforms:

±(4.0% × | reading – Offset | + Offset Accuracy + (0.06 Div x V/Div))

Delta Volts between any two averages of 16 waveforms acquired under the same setup and ambient conditions:

±(4.0% × | reading | + (0.1 Divs x V/Div) + 0.3 mV)

For an average of 16 waveforms:

±(1.5% × | reading – Offset | + Offset Accuracy + (0.06 Div x V/Div))

Delta Volts between any two averages of 16 waveforms acquired under the same setup and ambient conditions:

±(1.5% × | reading | + (0.1 Divs x V/Div) + 0.3 mV)

Any sample:

±(4.0% × | reading – Offset | + Offset Accuracy + (0.13 Divs x V/Div) + 0.6 mV)

Delta Volts between any two samples acquired under the same setup and ambient conditions:

±(4.0% × | reading | + (0.26 Divs x V/Div) + 1.2 mV)

Any sample:

±(1.5% × | reading – Offset | + Offset Accuracy + (0.13 Divs x V/Div) + 0.6 mV)

Delta Volts between any two samples acquired under the same setup and ambient conditions:

±(1.5% × | reading | + (0.26 Divs x V/Div) + 1.2 mV)

50 mV/Div to 499 mV/Div 2% of of fset ± .3 Divs x V/Div

500 mV/Div to 2 V/Div 2% of offset ± .2 Divs x V/Div

Analog Bandwidth with P6240 Probe or Coaxial Adapter Limits given for an ambient temperature range of 0_ C to +30_ C.

Derate upper bandwidth frequencies by 5.0 MHz for each _ C above +30_ C.

V/Div Setting 200 mV/Div to 2 V/Div DC to 500 MHz 100 mV/Div to 199 mV/Div DC to 450 MHz 50 mV/Div to 99.9 mV/Div DC to 350 MHz

Delay Between Channels with Coaxial Adapter 200 ps for any two channels with equal V/Div settings.

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Bandwidth

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Warranted Characteristics

T able 1–2: W arranted Characteristics: Signal Acquisition System (Cont.)

Name Description Delay Between Channels with P6240 Probe v500 ps for any two channels with equal V/Div settings.

Cross T alk (Channel Isolation) w100:1 at 100 MHz and w30:1 at the rated bandwidth for the

sensitivity rating of the channel, for any two channels having equal V/Div settings.

T able 1–3: Warranted Characteristics: Time Base System

Name Description Sample Rate and Delay Time Accuracy "100 ppm over any interval w1 ms. Seconds/Div Time Base Accuracy "100 ppm over any interval w1 ms. Delta Time Measurement Accuracy Conditions T ime Measurement Accuracy

Single shot sample mode, ±(1 WI1 + 100 ppm × | Reading | + 20 MHz Bandwidth selected 1.1 ns)

Repetitive, w8 averages, ±(1 WI bandwidth selected 180 ps)

The Waveform Interval (WI) is the time between the samples in the waveform record.

+ 100 ppm × | Reading | +

T able 1–4: Warranted Characteristics: Triggering System

Name Description Edge Trigger Accuracy Any channel: 0.50 Divs from DC to 50 MHz, increasing to 3.0 Divs

at 500 MHz.

Pulse-, Sequence-, or Pattern-Type Trigger Time Accuracy (Single Channel)

Pulse-, Sequence-, or Pattern-Type Trigger T ime Accuracy (Multiple Channels)

Pulse-, Sequence-, or Pattern-Type Trigger Minimum T ime Interval 500 ps. Edge-Type T rigger Minimum Pulse Width 800 ps. Pulse-Type Trigger Rearm Time 2.5 ns. Pulse-Type T rigger Minimum Pulse Width 2.0 ns. Pattern-Type T rigger Minimum Pattern Width 4.0 ns.

Width or Limit Setting Trigger Time Accuracy

2.4 ns to 35 ns ±(5% of setting + 0.5 ns) 35 ns to 1 ms ±(10% of setting + 0.5 ns)

1.02 ms to 1 s ±(.01% of setting +50 ns) Width or Limit Setting Trigger Time Accuracy

2.4 ns to 35 ns ±(5% of setting + 2.5 ns) 35 ns to 1 ms ±(10% of setting + 2.5 ns)

1.02 ms to 1 s ±(.01% of setting +50 ns)

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