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

TDS3000C Series Service Manual ix
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. Do not perform internal service or adjustments of this
product unless another person capable of rendering first aid and resuscitation is
present.
Disconnect Power. To avoid electric shock, switch off the instrument power, then
disconnect the power cord from the mains power.
Use Care When Servicing With Power On. 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.
To avoid electric shock, do not touch exposed connections.

Service Safety Summary
xTDS3000C Series Service Manual

TDS3000C Series Service Manual xi
Preface
This Service manual provides information to troubleshoot, disassemble, and
repair the following TDS3000C Series Digital Phosphor Oscilloscopes instru-
ment to the module level:
HTDS3012C
HTDS3014C
HTDS3032C
HTDS3034C
HTDS3052C
HTDS3054C

Preface
xii TDS3000C Series Service Manual

TDS3000C Series Service Manual 1-1
Operating Information
This chapter provides an overview of the following topics:
HConnecting power and using the battery pack
HInstalling an application module
HInstalling a communication module
HFront-panel menus and controls
HFront- and rear-panel connectors
HProbe compensation
HSelf calibration
HTransporting the oscilloscope
For details about operating information, see the TDS3000C Series Digital
Phosphor Oscilloscope User Manual.
For information about unpacking and inspecting the instrument, see Unpacking
and Repacking Instructions on page 4--39 of this manual.

Operating Information
1-2 TDS3000C Series Service Manual
Connecting Power
To connect a power cord, do these steps:
1. Open the strain relief clip and slip it onto the power cord.
2. Snap the strain relief into its hole in the rear panel of the oscilloscope.
3. Connect the power cord to the power input connector.
You can operate the oscilloscope from a grounded mains supply with line voltage
between 90 VAC and 250 VAC and frequency between 47 Hz and 440 Hz. The
oscilloscope is grounded through the power cord. The line fuse is internal and is
not user replaceable.
You can operate the oscilloscope continuously for up to three hours from the
TDS3BATC rechargeable battery pack. A triangle icon in the display ( ) shows
when the battery is in use, a power-plug icon ( ) shows when line power is
connected, and a gauge icon ( ) shows the relative charge level in the battery.
The oscilloscope turns off automatically when the battery runs low.
Refer to the General Safety Summary for information about proper rechargeable
battery disposal.
Using Battery Power

Operating Information
TDS3000C Series Service Manual 1-3
WARNING. To avoid electric shock, always connect the rear-panel ground
terminal to earth ground when operating the instrument from battery power.
For safe operation, the oscilloscope chassis must remain at earth ground potential
even when operating from battery power. Without a connection between the
chassis and earth ground, you can receive a shock from exposed metal on the
chassis if you connect an input to a hazardous voltage (>30 VRMS, >42 Vpk). To
protect against this condition, attach the Tektronix-supplied grounding wire from
the terminal on the rear panel to earth ground. If you use a different grounding
wire, it must be larger than 18 gauge (1 mm2).
When you start to use the battery pack, an on-screen message reminds you to
connect the grounding wire between the ground terminal on the rear panel and
earth ground.
Operating Safely with
Battery Power

Operating Information
1-4 TDS3000C Series Service Manual
To install the optional battery pack, do these steps:
1. Open the battery compartment door on the rear panel and remove the
accessory tray.
Battery door
2. Slide the battery into the compartment and press it in from both sides until
you hear the latches click.
3. Press on both sides of the battery compartment door to snap it closed.
Installing and Removing
the Battery

Operating Information
TDS3000C Series Service Manual 1-5
To remove the battery, do these steps:
1. Open the battery compartment door.
2. Lift the battery handles and pull the battery out of the oscilloscope.

Operating Information
1-6 TDS3000C Series Service Manual
The battery charges automatically when the oscilloscope is connected to line
power. You can also charge the battery with the optional external charger
(TDS3CHG).
Configuration Typical charging time
Battery charging in oscilloscope with oscillo-
scope turned on or off
32 hours
Battery charging with TDS3CHG external
charger
6 hours
NOTE. Charge the battery before using it for the first time or after prolonged
storage.
Charging the Battery