Tektronix TDS3000C Series User manual

Service Manual
TDS3000C Series
Digital Phosphor Oscilloscopes
071-2507-00
This document supports firmware version 4.00
and above for TDS3000C Series instruments only.
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.

Copyright ©Tektronix. All rights reserved. Licensed software products are owned by Tektronix or its subsidiaries or
suppliers, and are protected by national copyright laws and international treaty provisions.
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 and TEK are registered trademarks of Tektronix, Inc.
Contacting Tektronix
Tektronix, Inc.
14200 SW Karl Braun Drive
P.O. Box 500
Beaverton, OR 97077
USA
For product information, sales, service, and technical support:
HIn North America, call 1-800-833-9200.
HWorldwide, visit www.tektronix.com to find contacts in your area.

TDS3000C Series Service Manual i
Table of Contents
General Safety Summary v...................................
Service Safety Summary ix....................................
Preface xi...................................................
Operating Information
Operating Information 1--1............................................
Connecting Power 1--2................................................
Installing an Application Module 1--7....................................
Installing a Communication Module 1--8.................................
Front-Panel Menus and Controls 1--9....................................
Front-Panel Connectors 1--18...........................................
Rear-Panel Connectors 1--19............................................
Communication Module Connectors 1--20.................................
Probe Compensation 1--21..............................................
Self Calibration 1--22..................................................
Transporting the Oscilloscope 1--23......................................
Theory of Operation
Power Supply 2--1...................................................
Battery Board 2--2...................................................
Main Board 2--2.....................................................
Display Module 2--3.................................................
Front-Panel Board 2--3................................................
USB Port 2--3.......................................................
Adjustment Procedures
Required Equipment 3--1..............................................
Overview of the Adjustment Process 3--2.................................
Signal Connections 3--3...............................................
Factory Adjustment Procedure 3--6......................................
Maintenance
Preparation 4--1.....................................................
Preventing ESD 4--1.................................................
Inspection and Cleaning 4--2...........................................
Removal and Installation Procedures 4--5.................................
Troubleshooting 4--35.................................................
Troubleshooting Procedure 4--36.........................................
Unpacking and Repacking Instructions 4--39...............................
Options
Options 5--1........................................................

Table of Contents
ii TDS3000C Series Service Manual
Replaceable Parts List
Replaceable Parts List 6--1............................................
Parts Ordering Information 6--1.........................................
Using the Replaceable Parts List 6--3....................................

Table of Contents
TDS3000C Series Service Manual iii
List of Figures
Figure 2--1: TDS3000C series block diagram 2--1...................
Figure 4--1: Pulling the hub pin 4--9..............................
Figure 4--2: Releasing the hub assembly 4--10.......................
Figure 4--3: Reinstalling a hub cover 4--12..........................
Figure 4--4: Communication module guide 4--13.....................
Figure 4--5: Rear chassis cables to the main board 4--15..............
Figure 4--6: Installing the fan, line filter, and line power cable 4--17.....
Figure 4--7: Installing the AC line filter and shield 4--18..............
Figure 4--8: Installing the line filter and line power cable 4--19.........
Figure 4--9: Main Board 4--22....................................
Figure 4--10: Install the J500 connector clip 4--24....................
Figure 4--11: Taping trigger cable (four-channel models only) and
display cable 4--25...........................................
Figure 4--12: Front chassis 4--26..................................
Figure 4--13: Display module 4--27................................
Figure 4--14: Front-panel cable routing 4--28........................
Figure 4--15: Front-panel USB port removal 4--29...................
Figure 4--16: Remove inverter board 4--30..........................
Figure 4--17: Remove display from display chassis 4--31..............
Figure 4--18: Remove back light tube 4--32.........................
Figure 4--19: Installing display glass shield 4--33.....................
Figure 4--20: Primary troubleshooting procedure 4--36...............
Figure 4--21: AC power supply troubleshooting procedure 4--37........
Figure 4--22: Module isolation troubleshooting procedure 4--38........
Figure 6--1: Exploded view, front case half 6--4.....................
Figure 6--2: Exploded view, LCD display 6--6......................
Figure 6--3: Exploded view, main board 6--8.......................
Figure 6--4: Exploded view, circuit board assembly and fan 6--10.......
Figure 6--5: Exploded view, rear case half 6--12......................

Table of Contents
iv TDS3000C Series Service Manual
List of Tables
Table 4--1: Internal inspection check list 4--3......................
Table 4--2: Removal and installation procedures 4--6................
Table 5--1: TDS3000C Series options 5--1.........................

TDS3000C Series 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. To avoid potential hazards, use this
product only as specified.
Use Proper Power Cord. Use only the power cord specified for this product and
certified for the country of use.
Connect and Disconnect Properly. Connect the probe output to the measurement
instrument before connecting the probe to the circuit under test. Disconnect the
probe input and the probe ground from the circuit under test before disconnecting
the probe from the measurement instrument.
Ground the Product. When operating with AC power, 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.
When operating with battery power, this product must still be grounded. To
prevent electric shock, always connect a grounding wire between the ground
terminal on the rear panel and earth ground.
Observe All Terminal Ratings. To avoid fire or shock hazard, observe all ratings
and markings on the product. Consult the product manual for further ratings
information before making connections to the product.
Connect the ground lead of the probe to earth ground only.
To Avoid Fire or Personal
Injury

General Safety Summary
vi TDS3000C Series Service Manual
Replace Batteries Properly. Replace batteries only with the proper type and rating
specified.
Recharge Batteries Properly. Recharge batteries for the recommended charge
cycle only.
Do Not Operate Without Covers. Do not operate this product with covers or panels
removed.
Avoid Exposed Circuitry. Do not touch exposed connections and components
when power is present.
Do Not Operate With Suspected Failures. If you suspect there is damage to this
product, have it inspected by qualified service personnel.
Do Not Operate in Wet/Damp Conditions.
Do Not Operate in an Explosive Atmosphere.
Keep Product Surfaces Clean and Dry.
Provide Proper Ventilation. Refer to the manual’s installation instructions for
details on installing the product so it has proper ventilation.
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.
Safety Terms and Symbols

General Safety Summary
TDS3000C Series Service Manual vii
Symbols on the Product. These symbols may appear on the product:
Protective Ground
(Earth) Terminal
CAUTION
Refer to Manual
WARNING
High Voltage
Battery
Information
Ethernet Port Chassis Ground
Preventing Electrostatic Damage
CAUTION. Electrostatic discharge (ESD) can damage components in the
oscilloscope and its accessories. To prevent ESD, observe these precautions
when directed to do so.
Use a Ground Strap. Wear a grounded antistatic wrist strap to discharge the static
voltage from your body while installing or removing sensitive components.
Use a Safe Work Area. Do not use any devices capable of generating or holding a
static charge in the work area where you install or remove sensitive components.
Avoid handling sensitive components in areas that have a floor or benchtop
surface capable of generating a static charge.
Handle Components Carefully. Do not slide sensitive components over any
surface. Do not touch exposed connector pins. Handle sensitive components as
little as possible.
Transport and Store Carefully. Transport and store sensitive components in a
static-protected bag or container.

General Safety Summary
viii TDS3000C Series Service Manual