Tektronix TDS200 Series User manual

Service Manual
TDS 200-Series
Digital Real-Time Oscilloscope
071-0492-02
This document supports 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 all safety
summaries prior to performing service.
www.tektronix.com

Copyright ©Tektronix, Inc. All rights reserved.
Tektronix 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.
Tektronix, Inc., P.O. Box 500, Beaverton, OR 97077
TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.

WARRANTY
Tektronix warrants that the products that it manufactures and sells will be free from defects in materials and workmanship for
a period of three (3) years from the date of purchase from an authorized Tektronix distributor. If any such product proves
defective during this warranty period, Tektronix, 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. Batteries are excluded from this warranty.
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 Tektronix, shipping charges prepaid, and with a copy of
customer proof of purchase. Tektronix shall pay for the return of the product to Customer if the shipment is to a location
within the country in which the Tektronix 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. Tektronix shall not be obligated to furnish service under this warranty a) to repair damage resulting from attempts
by personnel other than Tektronix representatives to install, repair or service the product; b) to repair damage resulting from
improper use or connection to incompatible equipment; c) to repair any damage or malfunction caused by the use of
non-Tektronix supplies; or d) 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 THE LISTED PRODUCTS IN LIEU OF
ANY OTHER WARRANTIES, EXPRESS 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 CUSTOMER 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.

TDS 200 Series Digital Oscilloscope Service Manual i
Table of Contents
General Safety Summary v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Safety Summary vii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preface ix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Related Manuals ix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contacting Tektronix x. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product End-of-Life Handling x. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications
Specifications 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Information
Operating Information 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Features 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension Modules 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Functional Check 2–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Probe Compensation 2–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Self Calibration 2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Probe Safety 2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Probe Attenuation Setting 2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Factory Setup 2–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Theory of Operation
Theory of Operation 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Main Board 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Supply 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Display Module 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Panel 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension Modules 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Verification
Performance Verification 4–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test Record 4–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Verification Procedures 4–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustment Procedures
Adjustment Procedures 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Required Equipment 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustment Procedure 5–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents
ii TDS 200 Series Digital Oscilloscope Service Manual
Maintenance
Maintenance 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preparation 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preventing ESD 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Cleaning 6–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal and Installation Procedures 6–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 6–38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Repackaging Instructions 6–48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Options
Options 7–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Parts List
Electrical Parts List 8–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagrams
Diagrams 9–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replaceable Parts
Replaceable Parts 10–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Ordering Information 10–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using the Replaceable Parts List 10–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents
TDS 200 Series Digital Oscilloscope Service Manual iii
List of Figures
Figure 2–1: Routing the power cord and security cable 2–3. . . . . . . . . . .
Figure 2–2: Installing an extension module 2–4. . . . . . . . . . . . . . . . . . . . .
Figure 3–1: Module-level block diagram (two channel) 3–3. . . . . . . . . . .
Figure 3–2: Module-level block diagram (four channel) 3–4. . . . . . . . . . .
Figure 5–1: Service menu enable button 5–2. . . . . . . . . . . . . . . . . . . . . . . .
Figure 5–2: Adjustment setups 5–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–1: Removing the rear feet 6–8. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–2: Installing the rear feet 6–9. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–3: Installing a front-case label 6–10. . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–4: Installing a new rear-case label 6–11. . . . . . . . . . . . . . . . . . . . .
Figure 6–5: Removing the handle 6–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–6: Installing the handle 6–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–7: Removing and installing the rear cover 6–15. . . . . . . . . . . . . .
Figure 6–8: Removing and installing the front feet 6–16. . . . . . . . . . . . . . .
Figure 6–9: Removing and installing the EMI clips 6–17. . . . . . . . . . . . . . .
Figure 6–10: Removing the flip stand 6–18. . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–11: Installing the flip stand 6–19. . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–12: Line fuse location 6–20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–13: Removing the power supply module 6–21. . . . . . . . . . . . . . . .
Figure 6–14: Installing the power supply module 6–22. . . . . . . . . . . . . . . .
Figure 6–15: Removing and installing the internal assembly 6–24. . . . . . .
Figure 6–16: Installing the copper mesh grounding tube 6–25. . . . . . . . . .
Figure 6–17: Main board removal 6–26. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–18: Main board installation 6–27. . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–19: Removing the display module 6–28. . . . . . . . . . . . . . . . . . . . .
Figure 6–20: Installing the display module 6–30. . . . . . . . . . . . . . . . . . . . . .
Figure 6–21: Removing the front panel module 6–31. . . . . . . . . . . . . . . . . .
Figure 6–22: Installing the front panel module 6–32. . . . . . . . . . . . . . . . . .
Figure 6–23: Removing and installing the keypad 6–33. . . . . . . . . . . . . . . .
Figure 6–24: Removing the display shield 6–35. . . . . . . . . . . . . . . . . . . . . .
Figure 6–25: Installing the display shield 6–36. . . . . . . . . . . . . . . . . . . . . . .
Figure 6–26: Measuring the backlight voltage 6–41. . . . . . . . . . . . . . . . . . .
Figure 10–1: Exploded diagram 10–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents
iv TDS 200 Series Digital Oscilloscope Service Manual
List of Tables
Table 1–1: Specifications 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 1–2: General specifications 1–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 2–1: Factory setup settings 2–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 5–1: Required equipment 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 5–2: TDS 210 and TDS 220 Adjustment steps 5–5. . . . . . . . . . . . . .
Table 5–3: TDS 224 Adjustment steps 5–7. . . . . . . . . . . . . . . . . . . . . . . . .
Table 6–1: Internal inspection check list 6–3. . . . . . . . . . . . . . . . . . . . . . .
Table 6–2: List of procedures 6–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 6–3: List of error codes 6–46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 10–1: Parts list column descriptions 10–2. . . . . . . . . . . . . . . . . . . . . .
Table 10–2: Manufacturers cross index 10–3. . . . . . . . . . . . . . . . . . . . . . . .
Table 10–3: Replaceable parts list 10–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 10–4: Replaceable standard accessories 10–8. . . . . . . . . . . . . . . . . . .
Table 10–5: Replaceable optional accessories 10–8. . . . . . . . . . . . . . . . . . .

TDS 200 Series Digital Oscilloscope Service Manual v
General Safety Summary
Review the following safety precautions to avoid injury and prevent damage to
this product or any products connected to it.
Only qualified personnel should perform service procedures.
Use Proper Power Cord. To avoid fire hazard, use only the power cord specified
for this product.
Avoid Electric Overload. To avoid electric shock or fire hazard, do not apply a
voltage to a terminal that is outside the range specified for that terminal.
Avoid Overvoltage. To avoid electric shock or fire hazard, do not apply potential
to any terminal, including the common terminal, that varies from ground by more
than the maximum rating for that terminal.
Avoid Electric Shock. To avoid injury or loss of life, do not connect or disconnect
probes or test leads while they are connected to a voltage source.
Ground the Product. This product is grounded through the grounding conductor
of the power cord. To avoid electric shock, the grounding conductor must be
connected to earth ground. Before making connections to the input or output
terminals of the product, ensure that the product is properly grounded.
Connect the Probe Properly. The probe ground lead is at ground potential. Do not
connect the ground lead to an elevated voltage.
Do Not Operate Without Covers. To avoid electric shock or fire hazard, do not
operate this product with covers or panels removed.
Use Proper Fuse. To avoid fire hazard, use only the fuse type and rating specified
for this product.
Do Not Operate in Wet/DampConditions. To avoid electric shock, do not operate
this product in wet or damp conditions.
Do Not Operate in an Explosive Atmosphere. To avoid injury or fire hazard, do not
operate this product in an explosive atmosphere.
Use Proper Power Source. Do not operate this product from a power source that
applies more than the voltage specified.
Provide Proper Ventilation. To prevent product overheating, provide proper
ventilation.
Do Not Operate With SuspectedFailures. If you suspect there is damage to this
product, have it inspected by qualified service personnel.
Injury Precautions
Product Damage
Precautions

General Safety Summary
vi TDS 200 Series Digital Oscilloscope Service Manual
Terms in this Manual. These terms may appear in this manual:
WARNING. Warning statements identify conditions or practices that could result
in injury or loss of life.
CAUTION. Caution statements identify conditions or practices that could result in
damage to this product or other property.
Terms on the Product. These terms may appear on the product:
DANGER indicates an injury hazard immediately accessible as you read the
marking.
WARNING indicates an injury hazard not immediately accessible as you read the
marking.
CAUTION indicates a hazard to property including the product.
Symbols on the Product. The following symbols may appear on the product:
ProtectiveGround
(Earth)Terminal ATTENTION Refer to Manual Double Insulated
DANGER
High Voltage
Refer to the specifications section for a listing of certifications and compliances
that apply to this product.
Symbols and Terms
Certifications and
Compliances