Tektronix TDS3000B Series User manual

Service Manual
TDS3000B Series
Digital Phosphor Oscilloscopes
071-0972-05
This document supports firmware version 3.00
and above for TDS3000B Series instruments only.
Warning
Revision B
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.

TDS3000B Series Service Manual i
Table of Contents
General Safety Summary vii...................................
Service Safety Summary xi....................................
Environmental Considerations xii...............................
Preface xiv...................................................
Specifications
Specifications 1--1...................................................
Operating Information
Connecting Power 2--2................................................
Installing an Application Module 2--7....................................
Installing a Communication Module 2--8.................................
Front-Panel Menus and Controls 2--9....................................
Front-Panel Connectors 2--18...........................................
Rear-Panel Connectors 2--19............................................
Communication Module Connectors 2--20.................................
Probe Compensation 2--21..............................................
Self Calibration 2--22..................................................
Transporting the Oscilloscope 2--23......................................
Theory of Operation
Power Supply 3--1...................................................
Battery Board 3--2...................................................
Main Board 3--2.....................................................
Display Module 3--3.................................................
Front-Panel Board 3--3................................................
Disk Drive 3--3......................................................
Performance Verification
Test Record 4--2.....................................................
Performance Verification Procedures 4--5.................................
Adjustment Procedures
Required Equipment 5--1..............................................
Overview of the Adjustment Process 5--2.................................
Signal Connections 5--3...............................................
Factory Adjustment Procedure 5--6......................................
Maintenance
Preparation 6--1.....................................................
Preventing ESD 6--1.................................................
Inspection and Cleaning 6--2...........................................

Table of Contents
ii TDS3000B Series Service Manual
Removal and Installation Procedures 6--5.................................
Troubleshooting 6--39.................................................
Troubleshooting Procedure 6--40.........................................
Unpacking and Repacking Instructions 6--43...............................
Options
Options 7--1........................................................
Electrical Parts List
Electrical Parts List 8--1..............................................
Diagrams
Diagrams 9--1.......................................................
Mechanical Parts List
Parts Ordering Information 10--1.........................................
Using the Replaceable Parts List 10--2....................................

Table of Contents
TDS3000B Series Service Manual iii
List of Figures
Figure 3--1: TDS3000B series block diagram 3--1...................
Figure 6--1: Pulling the hub pin 6--8..............................
Figure 6--2: Releasing the hub assembly 6--9.......................
Figure 6--3: Reinstalling a hub cover 6--11..........................
Figure 6--4: Communication module guide 6--12.....................
Figure 6--5: Main board disk drive flex cable connector J800 6--13.....
Figure 6--6: Removing the bezel from a new disk drive 6--14...........
Figure 6--7: Rear chassis cables to the main board 6--16..............
Figure 6--8: Installing the fan, line filter, and line power cable 6--18.....
Figure 6--9: Installing the AC line filter and shield 6--19..............
Figure 6--10: Installing the line filter and line power cable 6--20........
Figure 6--11: Removing the J500 connector clip 6--22.................
Figure 6--12: Disconnect main board cable connectors 6--23...........
Figure 6--13: Main Board 6--24...................................
Figure 6--14: Install the J500 connector clip 6--26....................
Figure 6--15: Front chassis 6--27..................................
Figure 6--16: Display module 6--28................................
Figure 6--17: Front-panel cable routing 6--29........................
Figure 6--18: Disconnect back light cables 6--30.....................
Figure 6--19: Remove inverter board 6--31..........................
Figure 6--20: Remove display from display chassis 6--32..............
Figure 6--21: Remove back light tube 6--33.........................
Figure 6--22: Installing display glass shield 6--34.....................
Figure 6--23: Remove front-panel knobs 6--35.......................
Figure 6--24: Remove front-panel board 6--36.......................
Figure 6--25: Remove front-panel keypads 6--37.....................
Figure 6--26: Checking front-panel lock nuts 6--38...................
Figure 6--27: Primary troubleshooting procedure 6--40...............
Figure 6--28: AC power supply troubleshooting procedure 6--41........
Figure 6--29: Module isolation troubleshooting procedure 6--42........

Table of Contents
iv TDS3000B Series Service Manual
Figure 10--1: Exploded view, front case half 10--4....................
Figure 10--2: Exploded view, LCD display 10--6.....................
Figure 10--3: Exploded view, main board and disk drive 10--8.........
Figure 10--4: Exploded view, circuit board assembly and fan 10--10......
Figure 10--5: Exploded view, rear case half 10--13.....................

Table of Contents
TDS3000B Series Service Manual v
List of Tables
Table 1--1: Specifications 1--1...................................
Table 6--1: Internal inspection check list 6--3......................
Table 6--2: Removal and installation procedures 6--6................
Table 7--1: TDS3000B Series options 7--1.........................

Table of Contents
vi TDS3000B Series Service Manual

TDS3000B Series Service Manual vii
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
viii TDS3000B 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:
WAR NING . 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
TDS3000B Series Service Manual ix
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.
UseaSafeWorkArea.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
xTDS3000B Series Service Manual
Observe the following guidelines when recycling an instrument or component:
Mercury Notification. This oscilloscope uses an LCD backlight lamp that contains
mercury. Disposal may be regulated due to environmental considerations. Please
contact your local authorities or the Electronics Industries Alliance
(www.eiae.org) for disposal or recycling information.
Battery Recycling. This product may contain a Nickel Cadmium (NiCd) or
lithium ion (Li-ion) rechargeable battery, which must be recycled or disposed of
properly. Please properly dispose or recycle the battery according to local
government regulations.
The TDS3BATB lithium ion rechargeable battery pack contains less than 8
grams of lithium, with individual cells containing less than 1.5 grams of lithium,
as measured by International Civil Aviation Organization (ICAO) standards.
Consult your air carrier for applicability and determination of any special lithium
ion battery transportation requirements.
Product End-of-Life
Handling
Transportation and
Lithium Ion Batteries

TDS3000B Series Service Manual xi
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.

xii TDS3000B Series Service Manual
Environmental Considerations
This section provides information about the environmental impact of the
product.
Observe the following guidelines when recycling an instrument or component:
Equipment Recycling. Production of this equipment required the extraction and
use of natural resources. The equipment may contain substances that could be
harmful to the environment or human health if improperly handled at the
product’s end of life. In order to avoid release of such substances into the
environment and to reduce the use of natural resources, we encourage you to
recycle this product in an appropriate system that will ensure that most of the
materials are reused or recycled appropriately.
The symbol shown to the left indicates that this product
complies with the European Union’s requirements
according to Directive 2002/96/EC on waste electrical and
electronic equipment (WEEE). For information about
recycling options, check the Support/Service section of the
Tektronix Web site (www.tektronix.com).
Battery Recycling. This product may contain a Nickel Cadmium (NiCd) or
lithium ion (Li--ion) rechargeable battery, which must be recycled or disposed of
properly. Please properly dispose of or recycle the battery according to local
government regulations.
Mercury Notification. This product uses an LCD backlight lamp that contains
mercury. Disposal may be regulated due to environmental considerations. Please
contact your local authorities or, within the United States, the Electronics
Industries Alliance (www.eiae.org) for disposal or recycling information.
The lithium ion rechargeable battery pack in this product contains less than
8 grams of equivalent lithium content, with individual cells containing less than
1.5 grams of equivalent lithium, as measured by International Civil Aviation
Organization (ICAO) standards. Consult your air carrier for applicability and
determination of any special lithium ion battery transportation requirements.
Product End-of-Life
Handling
Transporting Batteries

Environmental Considerations
TDS3000B Series Service Manual xiii
This product has been classified as Monitoring and Control equipment, and is
outside the scope of the 2002/95/EC RoHS Directive. This product is known to
contain lead, cadmium, mercury, and hexavalent chromium.
Restriction of Hazardous
Substances

xiv TDS3000B Series Service Manual
Preface
This Service manual provides information to troubleshoot, disassemble, and
repair the following TDS3000B Series Digital Phosphor Oscilloscopes instru-
ment to the module level:
HTDS3012B
HTDS3014B
HTDS3024B
HTDS3032B
HTDS3034B
HTDS3044B
HTDS3052B
HTDS3054B
HTDS3064B

Specifications

TDS3000B Series Service Manual 1-1
Specifications
This appendix contains specifications for the TDS3000B Series oscilloscopes.
All specifications are guaranteed unless noted as “typical.” Typical specifications
are provided for your convenience but are not guaranteed. Specifications that are
marked with the nsymbol are checked in Performance Verification.
All specifications apply to all TDS3000B models unless noted otherwise.
To meet specifications, two conditions must first be met:
HThe oscilloscope must have been operating continuously for twenty minutes
within the operating temperature range specified.
HYou must perform the Compensate Signal Path operation described on
page 2--22 prior to evaluating specifications. If the operating temperature
changes by more than 10 °C, you must perform the Compensate Signal Path
operation again.
Table 1- 1: Specifications
Acquisition
Acquisition modes Sample (Normal), Peak detect, Envelope, and Average
Single Sequence Acquisition mode Acquisition stops after
g
q
Sample, Peak Detect One acquisition, all channels
simultaneously
Average, Envelope N acquisitions, all channels
simultaneously, N is settable from
2to256(or∞for Envelope)

Specifications
1-2 TDS3000B Series Service Manual
Table 1- 1: Specifications (cont.)
Inputs
Input coupling DC, AC, or GND
Channel input remains terminated when using GND coupling.
Input impedance,
DC coupled
1MΩ±1% in parallel with 13 pF ±2 pF, TekProbe compatible
50 Ω±1%; VSWR ≤1.5:1 from DC to 500 MHz, typical
Maximum voltage at Overvoltage category Maximum voltage
g
input BNC (1 MΩ)CAT I Environment
(refer to page 1--11)
150 VRMS (400 Vpk)
CAT II Environment
(refer to page 1--11)
100 VRMS (400 Vpk)
For steady-state sinusoidal waveforms, derate at 20 dB/decade above
200kHzto13V
pk at 3 MHz and above.
Maximum voltage at
input BNC (50 Ω)
5V
RMS with peaks ≤±30 V
Maximum floating
voltage
0 V from chassis (BNC) ground to earth ground, or
30 VRMS (42 Vpk) only under these conditions: no signal voltages
>30 VRMS (>42 Vpk), all common leads connected to the same voltage,
no grounded peripherals attached
Channel-to-channel
crosstalk, typical
Measured on one channel, with test signal applied to another channel,
and with the same scale and coupling settings on each channel
,
y
p
Frequency range Crosstalk
≤100 MHz ≥100:1
≤200 MHz ≥50:1
≤300 MHz ≥50:1
≤400 MHz ≥30:1
≤500 MHz ≥30:1
≤600 MHz ≥30:1
Differential delay,
typical
100 ps between any two channels with the same scale and coupling
settings