Tektronix TPS2014, TPS2024, TPS2012 User Manual

Service Manual

TPS2000 Series
Digital Storage Oscilloscopes

071-1465-01

This document supports firmware version 10.00
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. 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:

H In North America, call 1-800-833-9200.
H Worldwide, visit www.tektronix.com to find contacts in your area.

Warranty 2

P2220 Probe

Tektronix 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, 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. Parts, modules and replacement products used by Tektronix for warranty work
may be new or reconditioned to like new performance. All replaced parts, modules and products become the
property of Tektronix.

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, with
shipping charges prepaid. 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 PRODUCT 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.

Warranty 16

TPS2000 Series Oscilloscopes

Tektronix warrants that the product will be free from defects in materials and workmanship for a period of three
(3) years from the date of original purchase from an authorized Tektronix distributor. If the 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. Parts, modules and replacement products used by Tektronix for warranty work may
be new or reconditioned to like new performance. All replaced parts, modules and products become the property
of Tektronix.

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 PRODUCT 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.

WARRANTY

TPSBAT Battery Pack

Tektronix warrants that the product listed above will be free from defects in materials and workmanship for a period of three (3) months
from the date of original purchase from an authorized Tektronix distributor. If any such product proves defect ive during this warranty
period, Tektronix, at its option, either will repair t he defective product without charge for parts and labor, or will provide a replacement in
exchange for the defective product. Parts, modules and replacement products used by Tektronix for warranty work may be new or
reconditioned to like new performance. All replaced parts, modules and product s become the property of Tektronix.

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 PRODUCT 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.

Table of Contents

Specifications

Operating Information

Theory of Operation

General Safety Summary vii...................................

Service Safety Summary ix....................................

Environmental Considerations xi...............................

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

Related Manuals xiii.................................................

Certifications and Compliances 1--11.....................................

General Features 2--1.................................................

Attach Reference Leads Correctly 2--2...................................

Functional Check 2--3................................................

Self Calibration 2--4..................................................

Default Setup 2--4...................................................

Acquisition Board 3--2................................................

Acquisition System 3--2...........................................

Processing and Display System 3--3..................................

Probe Compensation 3--3..........................................

Acquisition Board Power 3--3.......................................

Power Supply and Battery System 3--4...................................

Display Module 3--4..................................................

Front Panel 3--4.....................................................

Two-Channel Oscilloscopes 3--4.....................................

Four-Channel Oscilloscopes 3--5....................................

LEDs 3--5......................................................

Internal Peripherals 3--5...........................................

External Peripherals 3--5...........................................

Performance Verification

Equipment Required 4--1..............................................

Test Record 4--2.....................................................

Performance Verification Procedures 4--3.................................

TPS2000 Series Digital Storage Oscilloscopes Service Manual

i

Table of Contents

Adjustment Procedures

Maintenance

Self Test 4--3....................................................

Self Calibration 4--3..............................................

Check DC Gain Accuracy 4--3......................................

Check Bandwidth 4--5.............................................

Check Sample Rate and Delay Time Accuracy 4--6......................

Check Edge Trigger Sensitivity 4--7..................................

Check External Edge Trigger Sensitivity 4--8...........................

Required Equipment 5--1..............................................

Adjustment Procedure 5--2.............................................

Enable the Service Menu 5--2.......................................

Adjustment Procedure 5--4.........................................

Preparation 6--1.....................................................

Preventing ESD 6--1..................................................

Inspection and Cleaning 6--2...........................................

General Care 6--2................................................

Inspection and Cleaning Procedures 6--2..............................

Removal and Installation Procedures 6--5.................................

Preparation 6--5..................................................

List of Modules 6--5..............................................

Replacement Procedures 6--5.......................................

Tools Required 6--6...............................................

Rear Case 6--7...................................................

Fan 6--9........................................................

Backlight Inverter Board 6--9.......................................

IO Board 6--10...................................................

Front-Panel Knob 6--11.............................................

Front Case 6--11..................................................

Acquisition Board 6--14............................................

Front-Panel Board 6--16............................................

Display Module 6--17..............................................

Compact Flash Board 6--18..........................................

Keypad 6--18.....................................................

Troubleshooting 6--20.................................................

Adjustment After Repair 6--20.......................................

Required Tools and Equipment 6--20..................................

Troubleshooting Tree 6--20..........................................

PROBE COMP Output 6--25........................................

Using the Error Log 6--25...........................................

Repackaging Instructions 6--27..........................................

Packaging 6--27...................................................

Storage 6--27.....................................................

Diagrams

ii

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Replaceable Parts

Table of Contents

Parts Ordering Information 8--1.........................................

Module Servicing 8--1.............................................

Using the Replaceable Parts List 8--2.....................................

Abbreviations 8--2................................................

Mfr. Code to Manufacturer Cross Index 8--3...........................

Replaceable Accessories 8--7...........................................

TPS2000 Series Digital Storage Oscilloscopes Service Manual

iii

Table of Contents

List of Figures

Figure 3--1: TPS2000 Series module-level block diagram,

remove CH3 and CH4 for a 2-channel version 3--1..............

Figure 5--1: Adjustment setups 5--3...............................

Figure 6--1: Removing and installing the rear case 6--8..............

Figure 6--2: Modules accessed from the rear of the oscilloscope 6--10....

Figure 6--3: Removing the BNC cover, shell, and retaining nuts 6--11....

Figure 6--4: Removing the front case 6--13..........................

Figure 6--5: Using a screwdriver to remove the Acquisition board 6--15.

Figure 6--6: Removing the front-panel module 6--16..................

Figure 6--7: Removing the display module 6--17.....................

Figure 6--8: Removing and installing the keypad 6--19................

Figure 6--9: Oscilloscope troubleshooting tree (1 of 4) 6--21............

Figure 6--10: Oscilloscope troubleshooting tree (2 of 4) 6--22...........

Figure 6--11: Oscilloscope troubleshooting tree (3 of 4) 6--23...........

Figure 6--12: Oscilloscope troubleshooting tree (4 of 4) 6--24...........

Figure 7--1: TPS2000 Series block diagram 7--1....................

Figure 8--1: Exploded view diagram 8--6..........................

Figure 8--2: Replaceable accessories 8--8..........................

iv

TPS2000 Series Digital Storage Oscilloscopes Service Manual

List of Tables

Table of Contents

Table 1--1: Oscilloscope general characteristics 1--1.................

Table 1--2: Oscilloscope display characteristics 1--7.................

Table 1--3: Oscilloscope physical characteristics 1--7................

Table 1--4: Power source characteristics 1--7.......................

Table 1--5: Oscilloscope environmental characteristics 1--8...........

Table 1--6: P2220 Probe specifications 1--9.........................

Table 1--7: P2220 Probe certifications and compliances 1--10..........

Table 1--8: P2220 Probe environmental characteristics 1--10...........

Table 2--1: Oscilloscope General features 2--1......................

Table 5--1: Required equipment 5--1.............................

Table 5--2: Adjustment steps 5--5................................

Table 6--1: Internal inspection check list 6--3......................

Table 6--2: Procedures for module replacement by removing the

rear case 6--6.............................................

Table 6--3: Procedures for module replacement by removing the

front case 6--6.............................................

Table 6--4: List of error codes 6--25...............................

Table 8--1: Parts list column descriptions 8--2......................

Table 8--2: Manufacturers cross index 8--3........................

Table 8--3: Replaceable parts list 8--4.............................

Table 8--4: Replaceable standard accessories 8--7...................

Table 8--5: Replaceable optional accessories 8--8...................

TPS2000 Series Digital Storage Oscilloscopes Service Manual

v

Table of Contents

vi

TPS2000 Series Digital Storage Oscilloscopes Service Manual

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.

Injury Precautions

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/Damp Conditions. 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.

Product Damage

Precautions

TPS2000 Series Digital Storage Oscilloscopes Service Manual

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 Suspected Failures. If you suspect there is damage to this
product, have it inspected by qualified service personnel.

vii

General Safety Summary

Symbols and Terms

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:

Probe Safety

DANGER

High Voltage

Earth Terminal

ATTENTION

Refer to Manual

Double

Insulated

A guard around the probe body provides a finger barrier for protection from
electric shock.

Finger guard

WARNING. To avoid electric shock when using the probe, keep fingers behind the
guard on the probe body, and do not touch metallic portions of the probe head
while it is connected to a voltage source.

Connect the probe output to the oscilloscope before connecting the probe to the
circuit under test. Disconnect the probe input and the probe reference lead from
the circuit under test before disconnecting the probe from the measurement
instrument.

viii

TPS2000 Series Digital Storage Oscilloscopes 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. 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, disconnect the main power by means
of the power cord or, if provided, the power switch.

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 aviod electrical shock, do not touch conductive parts.

TPS2000 Series Digital Storage Oscilloscopes Service Manual

ix

Service Safety Summary

x

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Environmental Considerations

This section provides information about the environmental impact of the
product.

Product End-of-Life

Handling

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).

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.

Restriction of Hazardous

Substances

TPS2000 Series Digital Storage Oscilloscopes Service Manual

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.

xi

Environmental Considerations

xii

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Preface

Related Manuals

The service manual for the TDS1000- and TDS2000-Series Digital Storage
Oscilloscopes provides instructions to verify the performance of, calibrate,
troubleshoot, and repair the oscilloscopes to the module level.

Unless noted otherwise, the term “oscilloscope” refers to all of the models in the
TDS1000 and TDS2000 series.

These manuals contain additional documentation for the oscilloscopes:

Extension module

User manual

Language

English 071-1064-XX 071-0409-XX 071-1075-XX

French 071-1065-XX* 071-0483-XX

German 071-1067-XX* 071-0485-XX

Italian 071-1066-XX* 071-0484-XX

Spanish 071-1068-XX* 071-0482-XX

Portuguese 071-1070-XX* 071-0486-XX

Japanese 071-1069-XX* 071-0488-XX

Korean 071-1073-XX* 071-0491-XX

Simplified Chinese 071-1071-XX* 071-0489-XX

Traditional Chinese 071-1072-XX* 071-0490-XX

Russian 071-1074-XX* 071-0487-XX

*These manuals contain a language overlay for the front-panel controls.

part number

instructions part
number

Programmer manual
part number

TPS2000 Series Digital Storage Oscilloscopes Service Manual

xiii

Preface

xiv

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Specifications

Specifications

g

q

These specifications apply to all TPS2000 Series oscilloscopes. To verify that an
oscilloscope meets specifications, it must first meet the following conditions:

H The oscilloscope must have been operating continuously for twenty minutes

within the specified operating temperature range. See page 1--8.

H You must perform the Do Self Cal operation, accessible through the Utility

menu, if the operating temperature changes by more than 5 °C.

H The oscilloscope must be within the factory calibration interval of one year.

H The V/div specifications apply with the probe calibration is set to 1X probe

mode.

Specifications begin in Table 1--1. All specifications are guaranteed unless noted
“typical.” Specifications that are marked with the n symbol are checked in the
Performance Verification section.

Table 1- 1: Oscilloscope general characteristics

Acquisition

Acquisition Modes Sample, Peak Detect, and Average

Acquisition Rate, typical Up to 180 waveforms per second, per channel (Sample acquisition mode, no measurements)

Single Sequence Acquisition Mode Acquisition Stops After

Sample, Peak Detect Single acquisition, all channels simultaneously.

Average N acquisitions, all channels simultaneously. N is selectable from

4, 16, 64, and 128.

Inputs

Input Coupling DC, AC, or GND

Input Impedance, DC
Coupled

P2220 Probe
Attenuation

Supported Voltage Probe
Attenuation Factors

Supported Current Probe
Scales

1MΩ ±2% in parallel with 20 pF ±3pF

1X, 10X

1X, 10X, 20X, 50X, 100X, 500X, 1000X

1 mV/A, 10 mV/A, 20 mV/A, 50 mV/A, 100mV/A, 200 mV/A, 1 V/A, 5 V/A

TPS2000 Series Digital Storage Oscilloscopes Service Manual

1- 1

Specifications

g

BNC

I

fth

val

x

ceeded,d

ama

cil

losc

a

y

g

Table 1- 1: Oscilloscope general characteristics (Cont.)

Inputs

Maximum Voltage Between Overvoltage Category
Signal and Reference at input

CAT I and CAT II 300 V

CAT III 150 V

Derate at 20 dB/decade above 100 kHz to 13 V peak AC at 3 MHz and above.

For nonsinusoidal waveforms, peak value must be less than 450 V. Excursion above 300 V
should be less than 100 ms duration.

RMS signal level, including any DC component removed through AC coupling, must be
limited to 300 V.

ese

uesare e

1

Maximum Voltage

rms

rms

ge to theos

ope m

result.

Maximum Voltage Between

600 V

CAT II or 300 V

rms

CAT III, using rated connectors or accessories.

rms

BNC Reference and Earth
Ground

Single Channel Common Greater than 1000:1 up to 50 MHz, derated to 400:1 at 200 MHz
Mode Rejection, typical

Sine wave with VOLTS/DIV setting at 5 mV. Signal applied between the channel (signal and
signal reference) and chassis. Ratio of the acquired signal amplitude to the amplitude of the
signal.

Channel-to-Channel Crosstalk TPS2012 and TPS2014 TPS2024

50 MHz: ≥100:1 100 MHz: ≥100:1

Measured on one channel, with test signal applied between signal and common of the other
channel, and with the same VOLTS/DIV and coupling settings on each channel.

1

Refer to the Overvoltage Category description on page 1- 13.

1- 2

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Table 1- 1: Oscilloscope general characteristics (Cont.)

n

AnalogBandwidthin

t

to10X,DCC

d

,yp

n

DCGainAccurac

y

n

DCMeasurement

Vertical

Digitizers 8-bit resolution (except when set to 2 mV/div), each channel sampled simultaneously.

VOLTS/DIV Range 2 mV/div to 5 V/div at input BNC

Position Range 2 mV/div to 200 mV/div, 2V

>200 mV/div to 5 V/div, 50 V

n Analog Bandwidth in

Sample and Average modes
at BNC or with P2220 probe
se

ouple

Analog Bandwidth in Peak
Detect mode (50 s/divto

2

5 s/div

), typical

Selectable Analog Bandwidth
Limit, typical

Lower Frequency Limit,
AC Coupled

Rise Time at BNC, typical TPS 2012 and TPS2014 TPS2024

Peak Detect Response

2

n DC Gain Accuracy

n DC Measurement

Accuracy, Average Acquisition
Mode

Volts Measurement Repeat­ability, Average Acquisition
Mode

1

When vertical scale is set to ≥ 5mV.

2

The oscilloscope reverts to Sample mode when the SEC/DIV (horizontal scale) is set from 2.5 s/div to 5 ns/div

on 100 MHz models, or from 2.5 s/div to 2.5 ns/div on a TPS2024 model. The Sample mode can still capture 12
ns glitches.

TPS2012 and TPS2014 TPS2024

100 MHz

1

200 MHz1(5 mV/div bandwidth is 200 MHz, typical), (at 40 °Cto
50 °C ambient, bandwidth is 200 MHz, typical).

20 MHz when vertical scale is set to less than 5 mV.

1

75 MHz

20 MHz when vertical scale is set to less than 5 mV

20 MHz

≤10 Hz at BNC

≤1 Hz when using a 10X passive probe

<3.5ns <2.1ns

Captures 50% or greater amplitude of pulses ≥12 ns wide typical (50 s/div to 5 s/div) in the
center 8 vertical divisions

±3% for Sample or Average acquisition mode, 5 V/div to 10 mV/div

±4% for Sample or Average acquisition mode, 5 mV/div and 2 mV/div

Measurement Type Accuracy

Average of ≥16 wave­forms with vertical posi-

±(3% × reading + 0.1 div + 1 mV) when 10 mV/div or greater is
selected

tion at zero

Average of ≥16 wave­forms with vertical posi­tion not at zero

±[3% × (reading + vertical position) + 1% of vertical position +

0.2 div]

Add 2 mV for settings from 2 mV/div to 200 mV/div
Add 50 mV for settings from >200 mV/div to 5 V/div

Delta volts between any

±(3% × reading + 0.05 div)
two averages of ≥16
waveforms acquired
under same setup and
ambient conditions

Specifications

TPS2000 Series Digital Storage Oscilloscopes Service Manual

1- 3

Specifications

p

g

/

g

g

n

TriggerSensitivity,

ggy,g

Table 1- 1: Oscilloscope general characteristics (Cont.)

Horizontal

Sample Rate Range TPS2012 and TPS2014 TPS2024

5S/sto1GS/s 5S/sto2GS/s

Waveform Interpolation (sin x)/x

Record Length 2500 samples for each channel

SEC/DIV Range TPS2012 and TPS2014 TPS2024

5ns/divto50s/div,ina
1, 2.5, 5 sequence

n Sample Rate and Delay

Time Accuracy

Delta Time Measurement
Accuracy (Full Bandwidth)

Position Range 2.5 ns/div to 10 ns/div: (--4 div × s/div) to 20 ms

±50 ppm over any ≥1 ms time interval

Conditions Accuracy

Single-shot, sample
mode

>16 averages ±(1 sample interval + 50 ppm × reading + 0.4 ns)

Sample interval = s/div ÷ 250

25 ns/div to 100 s/div: (--4 div × s/div) to 50 ms

250 s/divto10s/div:(--4div× s/div) to 50 s

25 s/div to 50s/div: (--4 div × s/div) to 250 s

2.5 ns/div to 50 s/div, in a 1, 2.5, 5 sequence

±(1 sample interval + 50 ppm × reading + 0.6 ns)

Trigger

n Trigger Sensitivity,

Edge Trigger Type

Trigger Sensitivity, Edge Coupling Sensitivity
Trigger Type, typical

1

Available only on 4-channel oscilloscopes.

Coupling Sensitivity

DC

AC Same as DC-coupled limits from 50 Hz and above

NOISE REJ Reduces the DC-coupled trigger sensitivity by 2 times for greater

HF REJ Same as the DC-coupled limit from DC to 7 kHz, attenuates

LF REJ Same as the DC-coupled limits for frequencies above 300 kHz,

CH1, CH2, CH31, CH4

EXT 1 V from 50 Hz to full BW

EXT/5 5 V from 50 Hz to full BW

EXT/10 10 V from 50Hz to full BW

than 10 mv/div to 5 V/div

signals above 80 kHz

attenuates signals below 300 kHz

1

1 div from DC to 10 MHz,

1.5 div from 10 MHz to Full BW

1- 4

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Table 1- 1: Oscilloscope general characteristics (Cont.)

ggg

Trigger

Trigger Level Range Source Range

CH1, CH2, CH31, CH41±8 divisions from center of screen

EXT ±4V

EXT/5 ±20 V

EXT/10 ±35 V

Trigger Level Accuracy,
typical

SET LEVEL TO 50%, typical Operates with input signals equal to or greater than 50 Hz

Default Settings, Video
Trigger

Sensitivity, Video Trigger
Type, typical

Signal Formats and Field
Rates, Video Trigger Type

Holdoff Range 500 ns to 10 s

1

Available only on 4-channel oscilloscopes.

Accuracies are for signals having rise and fall times ≥20 ns

Source Accuracy

Internal ±0.2 div × volts/div within ±4 divisions from center screen

EXT ±(6% of setting + 250 mV) for signals less than ±2V

EXT/5 ±(6% of setting + 500 mV) for signals less than ±10 V

EXT/10 ±(6% of setting + 1 V) for signals less than ±20 V

Coupling is AC and Auto except for a single sequence acquisition

Composite video signal

Source Range

Internal Pk-pk amplitude of 2 divisions

EXT ±1V

EXT/5 ±5V

EXT/10 ±10 V

Supports NTSC, PAL, and SECAM broadcast systems for any field or any line

Specifications

TPS2000 Series Digital Storage Oscilloscopes Service Manual

1- 5

Specifications

Table 1- 1: Oscilloscope general characteristics (Cont.)

Pulse Width Trigger

Pulse Width Trigger modes Trigger when < (Less than), > (Greater than), = (Equal), or ≠ (Not Equal);

Positive pulse or Negative pulse.

Pulse Width Trigger Point Equal: The oscilloscope triggers when the trailing edge of the pulse crosses the trigger level.

Not Equal: If the pulse is narrower than the specified width, the trigger point is the trailing
edge. Otherwise, the oscilloscope triggers when a pulse continues longer than the time
specified as the Pulse Width.

Less than: The trigger point is the trailing edge.

Greater than (also called time-out trigger): The oscilloscope triggers when a pulse continues

longer than the time specified as the Pulse Width.

Pulse Width Range Selectablefrom33nsto10s

Pulse Width Resolution 16.5 ns or 1 part per thousand, whichever is larger

Equal Guard Band t > 330 ns: ±5% ≤ guard band < ±(5.1% + 16.5 ns)

t ≤ 330 ns: guard band = ±16.5 ns

Not Equal Guard Band t > 330 ns: ±5% ≤ guard band < ±(5.1% + 16.5 ns)

165 ns < t ≤ 330 ns: guard band = --16.5 ns/+33 ns

t ≤165 ns: guard band = ±16.5 ns

Trigger Frequency Counter

Readout Resolution 6 digits

Accuracy, typical ±51 ppm including all frequency reference errors and ±1 count errors

Frequency Range AC coupled, 10 Hz minimum to rated bandwidth.

Signal Source Pulse Width/ Edge Trigger: all available trigger sources.

Frequency Counter measures trigger source at all times, including when the oscilloscope
acquisition is halted due to changes in the run status, or acquisition of a single shot event
has completed.

Pulse Width Trigger: The oscilloscope counts pul ses of significant magnitude inside the
250 ms measurement window that qualify as triggerable events, such as narrow pulses in a
PWM pulse train if set to < mode and the width is set to a relat ively small time.

Edge Trigger: The oscilloscope counts all edges of sufficient magnitude and correct polarity.

Video Trigger: The Frequency Counter does not operate.

1- 6

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Table 1- 1: Oscilloscope general characteristics (Cont.)

g,p

p

Measurements

Cursors Types Amplitude difference between cursors (ΔV, ΔA, ΔVA)

Time difference between cursors (Δt)
Reciprocal of ΔtinHertz(1/Δt)

Automatic Measurements Frequency, Period, Mean, Pk-Pk, Cycle RMS, Min, Max, Rise Time, Fall Time, Pos Width,

Neg Width

Probe Compensator Output

Output Voltage, typical 5V±10% into ≥1MΩ load

Frequency, typical 1 kHz

Adjustment Interval

The recommended factory calibration interval is one year.

Table 1- 2: Oscilloscope display characteristics

Specifications

Type 145 mm (5.7 in) diagonal liquid crystal

Resolution 320 x 240 vertical pixels

Brightness Adjustable

Contrast Adjustable, temperature compensated

Backlight Intensity1,typical 60 to 100 cd/m

1

Available through the display menu.

2

Table 1- 3: Oscilloscope physical characteristics

Size Height 160.8 mm (6.33 in)

Width 336.3 mm (13.24 in)

Depth 129.5 mm (5.10 in)

Weight, approximate Instrument only 2.7kg(6.0lbs)

1 battery installed 3.2kg(7.0lbs)

2 batteries installed 3.7kg(8.0lbs)

Table 1- 4: Power source characteristics

Source Voltage of the AC Adapter 90 to 264 VAC

Power Consumption Instrument only: 30 watts max.

AC input to AC adapter: 36 watts.

from 45 Hz through 66 Hz

rms

TPS2000 Series Digital Storage Oscilloscopes Service Manual

1- 7

Specifications

p

y

Table 1- 5: Oscilloscope environmental characteristics

Temperature Operating

2

Nonoperating

0 °Cto50°C(32°F to 122 °F) -- 4 0 °Cto+71°C(--40°F to 159.8 °F)

Humidity Operating

3

Nonoperating

60% RH: 30 °Cto50°C(86°F to 122 °F) 60% RH: 55 °Cto71°C (131 °F to 160 °F)

≤90% RH

Cooling Method Forced air, temperature controlled.

Altitude, Operating and

3,000 m (10,000 ft)

Nonoperating

Random Vibration Operating Nonoperating

0.31 g
each axis.

Mechanical Shock,
operating

1

2

1

With one battery pack installed.

Charge the battery packs within an ambient temperature range of 0 °Cto45°C(32°Fto113°F). Charging battery packs

50 g, 11 ms, half sine

from 5 Hz to 500 Hz, 10 minutes on

RMS

2.46 g
each axis.

outside of this range can damage cells or cause them to leak.

3

The battery packs are rated to operate between - 10 °C and +50 °C(-14°F and +122 °F) with less than 80% relative
humidity. Operating outside of this range can cause damage. Battery discharge capacity drops significantly at tempera­tures below 0 °C(32°F) and above 45 °C(113°F).

4

Wet bulb.

2

3

4

:0°Cto30°C(32°Fto86°F)

from 5 Hz to 500 Hz, 10 minutes on

RMS

1- 8

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Specifications

Table 1- 6: P2220 Probe specifications

Electrical characteristics 10X position 1X position

Bandwidth DC to 200 MHz DC to 6 MHz

Attenuation Ratio 10:1 ±2% 1:1 ±2%

Compensation Range 15 pF to 25 pF Compensation is fixed; correct for all oscillo-

scopes with 1 MΩ input.

Input Resistance 10 MΩ ±3% at DC 1MΩ ±3% at DC

Input Capacitance 13.0 pF to 17.0 pF 80 pF to 110 pF

Rise Time, typical <2.2ns < 50.0 ns

Maximum Input Voltage
Between Tip (Signal) and
Reference Lead

Maximum Input Voltage
Between Tip (Signal) and
Earth Ground

Maximum Voltage Between
Reference Lead and Earth
Ground

1

As defined in IEC61010-1: 2001. See certifications and compliances on page 1- 11.

2 The float voltage must be subtracted from the tip-to-earth ground voltage. For example, if the reference lead is floated to

30 V

, the tip voltage to the reference lead is limited to 270 V

rms

1

10X position 300 V

150 V

CATIIor300VDCCATII

rms

CAT III or 150 V DC CAT III

rms

420 V peak, <50% DF, <1 s PW
670 V peak, <20% DF, <1 s PW

1X position 150 V

100 V

CATIIor150VDCCATII

rms

CAT III or 100 V DC CAT III

rms

210 V peak, <50% DF, <1 s PW
330 V peak, <20% DF, <1 s PW

300 V

; derate at 20 dB/decade above 900 kHz to 13 V peak AC at 3 MHz and above. For

rms

nonsinusoidal waveforms, peak value must be less than 450 V.

Excursion above 300 V should be less than 100 ms duration. RMS signal level, including any DC
component removed through AC coupling, must be limited to 300 V. If these values are exceeded,
damage to the instrument may result. Refer to the Overvoltage Category on the next page.

1

10X position 300 V

150 V

CATIIor300VDCCATII

rms

CAT III or 150 V DC CAT III

rms

420 V peak, <50% DF, <1 s PW
670 V peak, <20% DF, <1 s PW

1X position 150 V

100 V

CATIIor150VDCCATII

rms

CAT III or 100 V DC CAT III

rms

210 V peak, <50% DF, <1 s PW
330 V peak, <20% DF, <1 s PW

2

30 V

rms

.

rms

TPS2000 Series Digital Storage Oscilloscopes Service Manual

1- 9

Specifications

ggy

p

y

Table 1- 7: P2220 Probe certifications and compliances

EC Declaration of Conformity Compliance was demonstrated to the following specification as listed in the Official Journal of the

European Communities.

Low Voltage Directive 73/23/EEC as amended by 93/68/EEC

EN 61010-1 2001 Safety requirements for electrical equipment for measurement, control, and

laboratory use.

EN 61010-2-031 2003 Particular requirements for hand-held probe assemblies for electrical

measurement and test.

Overvoltage Category Category Examples of Products in this Category

CAT III Distribution-level mains, fixed installation

CAT II

CAT I Signal levels in special equipment or parts of equipment, telecommunica-

Pollution Degree Pollution Degree 21. Do not operate in an environment where conductive pollutants may be present.

Safety UL61010-1, 2004 & UL61010B-2-031, 2003

CSA C22.2 No. 1010.1-92 & CAN/CSA C22.2 No. 1010.2.031-94

IEC61010-031: 2001

EN61010-031: 2001

1

As defined in IEC 61010-1:2001. See certifications and compliances on page 1- 11.

Local-level mains, appliances, portable equipment

tions, electronics

Table 1- 8: P2220 Probe environmental characteristics

Temperature Operating Nonoperating

0 °Cto50°C(32°F to 122 °F) -- 4 0 °Cto71°C(--40°F to +159.8 °F)

Humidity ≤60% relative humidity: 41 °Cto50°C (105 °F to 122 °F)

≤90% relative humidity: 40 °C (104 °F) or below

Cooling Method Convection

Altitude Operating Nonoperating

10,000 ft (3,000 m) 40,000 ft (15,000 m)

1- 10

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Certifications and Compliances

Specifications

EC Declaration of

Conformity - EMC

Australia / New Zealand

Declaration of Conformity

-EMC

Meets intent of Directive 89/336/EEC for Electromagnetic Compatibility.
Compliance was demonstrated to the following specifications as listed in the
Official Journal of the European Communities:

EN 61326. EMC requirements for Class A electrical equipment for measurement,
control, and laboratory use. Annex D.

H IEC 61000--4--2. Electrostatic discharge immunity

H IEC 61000--4--3. RF electromagnetic field immunity

H IEC 61000--4--4. Electrical fast transient / burst immunity

H IEC 61000--4--5. Power line surge immunity

H IEC 61000--4--6. Conducted RF Immunity

H IEC 61000--4--11. Voltage dips and interruptions immunity

EN 61000- 3- 2. AC power line harmonic emissions

EN 61000- 3- 3. Voltage changes, fluctuations, and flicker

Complies with EMC provision of Radiocommunications Act per these stan­dard(s):

H AS/NZS 2064.1/2. Industrial, Scientific, and Medical Equipment: 1992

2

EMC Compliance

FCC Compliance

Russian Federation

Peoples Republic of China

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Meets the intent of Directive 89/336/EEC for Electromagnetic Compatibility
when it is used with the product(s) stated in the specifications table. Refer to the
EMC specification published for the stated products. May not meet the intent of
the directive if used with other products.

Emissions comply with FCC 47 CFR, Part 15, Subpart B for Class A equipment.

This product was certified by the GOST ministry of Russia to be in compliance
with all applicable EMC and Safety Regulations.

This product has received the Chinese Metrology Certification. (CMC).

2

Emissions which exceed the levels required by this standard may occur when this
equipment is connected to a test object.

1- 11

Specifications

EC Declaration of

Conformity - Low Voltage

U.S. Nationally

Recognized Testing

Laboratory Listing

Canadian Certification

Additional Compliance

Compliance was demonstrated to the following specification as listed in the
Official Journal of the European Communities:

Low Voltage Directive 73/23/EEC, amended by 93/68/EEC.

H EN 61010-1:2001. Safety requirements for electrical equipment for

measurement control and laboratory use.

H EN 61010-2-031:2002. Particular requirements for handheld probe assem-

blies for electrical measurement and test equipment.

H UL 61010B--1:2004. Standard for electrical measuring and test equipment.

H UL 61010B--2--031:2003. Particular requirements for handheld probe

assemblies for electrical measurement and test equipment.

H CAN/CSA C22.2 No. 1010.1:1997. Particular requirements for electrical

equipment for measurement, control, and laboratory use. Part 1.

H CAN/CSA C22.2 No. 61010--2--031:1994. Particular requirements for

handheld probe assemblies for electrical measurement and test equipment.

H IEC 61010--1:2001. Safety requirements for electrical equipment for

measurement, control, and laboratory use.

Equipment Type

Pollution Degree

Descriptions

H IEC 61010--031:2002. Particular requirements for handheld probe assemblies

for electrical measurement and test equipment.

Test and measuring equipment.

A measure of the contaminates that could occur in the environment around and
within a product. Typically the internal environment inside a product is
considered to be the same as the external. Products should be used only in the
environment for which they are rated.

H Pollution Degree 1. No pollution or only dry, nonconductive pollution

occurs. Products in this category are generally encapsulated, hermetically
sealed, or located in clean rooms.

H Pollution Degree 2. Normally only dry, nonconductive pollution occurs.

Occasionally a temporary conductivity that is caused by condensation must
be expected. This location is a typical office/home environment. Temporary
condensation occurs only when the product is out of service.

H Pollution Degree 3. Conductive pollution, or dry, nonconductive pollution

that becomes conductive due to condensation. These are sheltered locations

1- 12

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Specifications

where neither temperature nor humidity is controlled. The area is protected
from direct sunshine, rain, or direct wind.

H Pollution Degree 4. Pollution that generates persistent conductivity through

conductive dust, rain, or snow. Typical outdoor locations.

Pollution Degree

Measurement Category

Descriptions

Overvoltage Category

Pollution Degree 2 (as defined in IEC 61010-1). Note: Rated for indoor use only.

Terminals on this product may have different measurement category designa­tions. The categories are:

H Measurement Category IV . For measurements performed at the source of

low-voltage installation.

H Measurement Category III. For measurements performed in the building

installation.

H Measurement Category II. For measurements performed on circuits directly

connected to the low-voltage installation.

H Measurement Category I. For measurements performed on circuits not

directly connected to MAINS.

Overvoltage Category II (as defined in IEC 61010-1)

TPS2000 Series Digital Storage Oscilloscopes Service Manual

1- 13

Specifications

1- 14

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Operating Information

Operating Information

TPS2000 Series oscilloscopes are two- or four-channel instruments in small,
lightweight, bench-top chassis.

In addition to a list of general features, this section covers:

H How to perform a brief functional check

H How to use the self-calibration routine

H How to restore factory default settings

For more detailed operating information, refer to your user manual.

General Features

The next table and list describe the general features.

Table 2--1: Oscilloscope General features

Model Channels Bandwidth Sample rate

TPS2012 2 100 MHz 1.0 GS/s

TPS2014 4 100 MHz 1.0 GS/s

TPS2024 4 200 MHz 2.0 GS/s

H Battery powered or line powered

H Two rechargeable battery packs (second battery pack optional)

H Independently isolated channels with no shared common ground

H Floating measurements

H TPS2PWR1 Power Analysis Application software (optional)

H Support for compatible voltage probes and current probes

H Context-sensitive help system

H Color LCD display

H Selectable 20 MHz bandwidth limit

H 2500 point record length for each channel

H Autoset

TPS2000 Series Digital Storage Oscilloscopes Service Manual

2--1

Operating Information

H Autoranging for quick set up and hands-free operation

H Probe Check Wizard

H Cursors with readouts

H Trigger frequency readout

H Eleven automatic measurements

H Waveform averaging and peak detection

H Dual time base

H Math functions: +, --, and × operations

H Math Fast Fourier Transform (FFT)

H Pulse Width trigger capability

H Video trigger capability with line-selectable triggering

H External trigger

H Setup and waveform storage

H Removable mass storage

H Variable persistence display

H RS-232 and Centronics ports

H OpenChoice PC Communications software

H User interface in ten user-selectable languages

Attach Reference Leads Correctly

WARNING. To avoid an electric shock, do not use probes that require a ground
connection, such as the Tektronix P5200 High Voltage Differential Probe, with
the TPS2000 series oscilloscopes. The P5200 High Voltage Differential Probe
requires an oscilloscope with grounded inputs and the TPS2000 series oscillo­scopes have floating inputs (isolated inputs).

2--2

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Functional Check

Operating Information

NOTE. You must attach the probe reference lead for each channel directly to your
circuit. These attachments are required because the oscilloscope channels are
electrically isolated; they do not share a common connection. Use the shortest
possible reference lead with each probe to maintain good signal fidelity.

The probe reference lead presents a higher capacitive load to the circuit under
test than the probe tip. When taking a floating measurement between two nodes
of a circuit, attach the probe reference lead to the lowest impedance or least
dynamic of the two nodes.

Perform this quick functional check to verify that your oscilloscope is operating
correctly.

1. Power on the oscilloscope.

Warning

ON/OFF

button

PROBE COMP

Read the floating measurements warning; then push OK.PushtheDEFAULT
SETUP button. The default Voltage Probe Attenuation option is 10X.

DEFAULT SETUP

button

2. Set the switch to 10X on the P2200 probe and connect the probe to channel 1 on

the oscilloscope . To do this, align the slot in the probe connector with the key
on the CH1 BNC, push to connect, and twist to the right to lock the probe in
place.

Connect the probe tip and reference lead to the PROBE COMP terminals.

CH 1

3. Push the AUTOSET button. Within a few seconds, you should see a square

wave in the display (approximately 5 V at 1 kHz peak-to-peak).

Push the CH 1 MENU button twice to remove channel 1, push the CH 2 MENU
button to display channel 2, repeat steps 2 and 3 above. For 4-channel models,
repeat for CH 3 and CH 4.

TPS2000 Series Digital Storage Oscilloscopes Service Manual

2--3

Operating Information

Self Calibration

Default Setup

The self-calibration routine lets you quickly optimize the oscilloscope signal path
for maximum measurement accuracy. You can run the routine at any time but you
should always run the routine if the ambient temperature changes by 5 _Cor
more.

To compensate the signal path, disconnect any probes or cables from the channel
input connectors. Then, press the UTILITY button and select the Do Self Cal
option. Follow the on-screen instructions to proceed.

Check the TPS2000 User Manual for the state of the oscilloscope after you press
DEFAULT SETUP.

2--4

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Theory of Operation

Theory of Operation

This section describes the electrical operation of the TPS2000 Series oscilloscope
to the module level. It describes the basic operation of each functional circuit
block shown in Figure 3--1.

CH1

CH2

CH3

CH4

EXT

Trig

J300

J500

J1000

J1200

J1700

Acquisition Board

Isolation

Circuit

Isolation

Circuit

Isolation

Circuit

Isolation

Circuit

Isolation

Circuit

J100

J201

J202

J2100

J1

LCD

Display

Front

Panel

J302

Compact

Flash Board

J1

J3

Compact

FLASH Card

Application

Key

Probe Comp

Output

DC Input

RS-232

J3

J630

J620

Parallel

Port

J610

IO Board

J2

Battery

2

J650

J600

J640

J1

Battery

1

Fan

LCD

Backlight

ON/OFF

Switch

Figure 3--1: TPS2000 Series module-level block diagram, remove CH3 and CH4 for a 2-channel version

TPS2000 Series Digital Storage Oscilloscopes Service Manual

3--1

Theory of Operation

Acquisition Board

The Acquisition board of the TPS2000 Series four-channel oscilloscope is
essentially a dual, two-channel oscilloscope tied together through a common
microprocessor, and some special interconnects. This allows the combining of
the display and trigger systems. For this reason, the focus of the Acquisition
board discussion will be on the two-channel system, with differences noted as
necessary.

At a minimum, the Acquisition board contains the following components:

H Attenuators

H ASIC amplifier

H Isolation circuit

H Digitizer--trigger system ASIC

H Signal-processing/display/system services ASIC

Acquisition System

H RAM

H FLASH ROM

H Microprocessor

H Internal peripheral interface

H Power supplies

For a four-channel oscilloscope, the attenuators and ASICs are duplicated. Most
of the other aspects of the circuitry remain unchanged.

Signals from the CH 1, CH 2, and other input connectors pass through attenua­tors and an AC-coupling switch to the amplifier ASIC. The EXT TRIG input
uses an abbreviated version of this path, without some of the attenuator settings
and the AC coupling switch.

The amplifier ASIC contains buffers and variable gain amplifiers, as well as
filters that provide 20 MHz bandwidth limiting. The task of the amplifier ASIC is
to convert from a 1 MΩ single-ended environment in the input to a much lower
impedance differential (and thus less noise-sensitive) environment for the
isolation and acquisition process. The amplifier ASIC assures that the input
signal is amplified to approximately the correct level to allow the fullest possible
use of the isolation circuit and digitizer.

3--2

The isolation circuit uses a modulation clock to transfer the input signal across
the isolation boundary via an isolation transformer. The input signal is demodu-

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Theory of Operation

lated and sent to the acquisition ASIC. Control of the amplifier ASIC across the
isolation boundary is provided by an optocoupler. Power is provided to each
amplifier ASIC and associated circuits by an isolated switching power supply,
dedicated to each channel

Each acquisition ASIC contains samplers and peak detectors, an amplifier, an
A/D converter, and the trigger logic. The digitized waveform samples are
transferred to the processing and display ASIC. In four-channel systems, the two
acquisition ASICs are interconnected so that a trigger on one ASIC can produce a
trigger on the other.

The processor system adds the microprocessor and FLASH ROM to the
processing and display system. The processor system interprets the front-panel
control changes detected by the display ASIC, provides control parameters based
upon user setting requests, computes waveform measurements, and manages the
internal and external peripherals. Saved setups, waveforms, and calibration
constants are stored in nonvolatile memory (NVRAM). The processor system
shares DRAM with the display system.

Processing and Display

System

Probe Compensation

Acquisition Board Power

The processing and display system consists of the display ASIC, DRAM, and
system oscillator. Digitized acquisition samples are received by the display ASIC
and stored in DRAM. Once data are received by the display ASIC, various
corrections are applied, display rasterization is performed, and the waveform is
placed into a display buffer. At the same time, the waveform is being read from
the display buffers and written to the LCD. Additional circuitry in the display
ASIC supports scanning of the front panel, provides DRAM refresh, processes
the clock, and performs various memory mapping tasks required by all elementa­ry microprocessor-based systems. In a four-channel system, the two display
ASICs are interconnected so that one ASIC may provide display information for
the second.

The processing and display system handles some of the computational tasks.
Other tasks are performed by the processor system. Since all array processing is
performed in the processing and display system, no computations can be
performed that involve data from two different channel sets. Thus, subtracting
channel 3 data from channel 2 is prohibited.

The PROBE COMP and ground terminals are provided for probe adjustment.

The IO board supplies the Acquisition board with 5.0, 3.0, 3.3, and 15 VDC.
These sources are used directly or as sources for other converters on the
Acquisition board. The Acquisition board supplies 35 volts used for LCD bias
and for series-strings of LEDs on the front panel for button illumination. The
LCD bias varies the contrast, and is temperature compensated by a thermistor
mounted on the front panel.

TPS2000 Series Digital Storage Oscilloscopes Service Manual

3--3

Theory of Operation

Power Supply and Battery System

The IO board accepts the power input for the oscilloscope from either a 15 VDC
external supply or from one of two internal Lithium-Ion battery packs. The
battery packs are SMBus compliant and user replaceable.

A microcontroller manages the routing of power from the DC input and the 2
battery packs. It also manages the charging of batteries and communication to the
Acquisition board.

The instrument cooling fan is powered by the IO board. The fan can be switched
on and off, having its voltage varied by signals from the Acquisition board.

Power for the LCD backlight inverter board is supplied by the IO board. A
dimming voltage, derived from a PWM pulse train and RC low-pass filter,
controls the brightness of the backlight.

RS-232 and Parallel port signals are passed from the Acquisition board through
the IO board to their rear-mounted connectors.

Display Module

Front Panel

Two-Channel

Oscilloscopes

The Liquid Crystal Display pattern consists of 320 columns with 3 subcolumns
and 240 rows, and has associated drivers and a backlight. The backlight is based
upon a 5 mA top-light fluorescent tube.

All switches, position encoders, and LEDs are mounted on the Front Panel board
of the two-channel oscilloscope. Additionally, an IC on this board provides
buffering and multiplexing of switch signals for the Acquisition board. (Two
signals and a sense line are provided by the Acquisition board to support the
front panel.) One of these lines resets the scan; a second clocks the scan to the
next position; and the sense line receives the current state of the selected switch
or encoder position.

For the encoders, some amount of debouncing occurs inside the front-panel IC.
All key debouncing is handled in the display ASIC on the Acquisition board.

3--4

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Theory of Operation

Four-Channel

Oscilloscopes

LEDs

Internal Peripherals

External Peripherals

The Front Panel board for four-channel oscilloscopes is effectively two front
panels in parallel. The left side of the board is largely handled by the display
ASIC for channels 1 and 2. The right side of the board is handled by the channel
3 and 4 ASIC. Separate front-panel ICs support these data paths.

The front panel contains three LEDs that light to indicate when the Save,
Autorange controls , or the multipurpose knob are active. In addition, most
buttons have a LED behind them for illumination in low-light conditions. Button
illumination can be turned off in the Utility menu.

The Acquisition board includes an FPGA that manages communication between
the microprocessor and the internal program memory (FLASH), RTC (Real-Time
Clock), battery system, and temperature sensor. The temperature sensor is used
for fan control.

The Acquisition board FPGA also manages communication between the
microprocessor and external RS-232 port, Printer Port, and Compact FLASH
Card.

TPS2000 Series Digital Storage Oscilloscopes Service Manual

3--5

Theory of Operation

3--6

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Performance Verification

Performance Verification

c

OscilloscopeCalibration

This section contains performance verification procedures for the specifications
marked with the n symbol. The following equipment, or a suitable equivalent,
is required to complete these procedures.

Equipment Required

Description

DC Voltage Source 17.5mVto7V,±0.5%

Leveled Sine Wave Generator 50 kHz and 200 MHz, ±3%

Time Mark Generator 10 ms period, ±10 ppm

Minimum
requirements

accuracy

amplitude accuracy

accuracy

Examples

Wavetek 9100 Universal
Calibration System with
Os

illoscopeCalibration

Module (Option 250)

Fluke 5500A Multi-product
Calibrator with Oscilloscope
Calibration Option (Option
5500A-SC)

50 Ω BNC Cable BNCmaletoBNCmale,

≈ 1 m (36 in) long

50 Ω BNC Cable BNCmaletoBNCmale,

≈ 25 cm (10 in) long

50 Ω Feedthrough
Termination

Dual Banana to BNC Adapter Banana plugs to BNC female Tektronix part number

Splitter, Power Frequency range: DC to 4

BNC male and female
connectors

GHz. Tracking: >2.0%

Tektronix part number
012-0482-XX

Tektronix part number
012-0208-XX

Tektronix part number
011-0049-XX

103-0090-00

Tektronix part number
015--0565--XX

TPS2000 Series Digital Storage Oscilloscopes Service Manual

4- 1

Performance Verification

curacy

curacy

curacy

curacy

Test Record

Serial
number

Test Passed Failed

Self Test

Oscilloscope tests Low limit Test result High limit

Channel 1 DC Gain Ac- 5mV/div 33.6 mV 36.4 mV

Procedure performed by Date

200 mV/div 1.358 V 1.442 V

2V/div 13.58 V 14.42 V

Channel 2 DC Gain Ac- 5mV/div 33.6 mV 36.4 mV

200 mV/div 1.358 V 1.442 V

2V/div 13.58 V 14.42 V

Channel 3 DC Gain Ac-

1

5mV/div 33.6 mV 36.4 mV

200 mV/div 1.358 V 1.442 V

2V/div 13.58 V 14.42 V

Channel 4 DC Gain Ac-

1

5mV/div 33.6 mV 36.4 mV

200 mV/div 1.358 V 1.442 V

2V/div 13.58 V 14.42 V

Channel 1 Bandwidth 2.12 V —

Channel 2 Bandwidth 2.12 V —

Channel 3 Bandwidth

Channel 4 Bandwidth

1

1

2.12 V —

2.12 V —

Sample Rate and Delay Time Accuracy -- 2 d i v s +2 divs

Channel 1 Edge Trigger Sensitivity Stable trigger —

Channel 2 Edge Trigger Sensitivity Stable trigger —

Channel 3 Edge Trigger Sensitivity

Channel 4 Edge Trigger Sensitivity

1

1

Stable trigger —

Stable trigger —

External Edge Trigger Sensitivity Stable trigger —

1 Channels 3 and 4 are only on four channel oscilloscopes.

4- 2

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Performance Verification Procedures

Before beginning these procedures, two conditions must first be met:

H The oscilloscope must have been operating continuously for twenty minutes

within the operating temperature range specified in the Specifications section
on page 1--8.

H You must perform the Self Calibration operation described below. If the

ambient temperature changes by more than 5 °C, you must perform the Self
Calibration operation again.

The time required to complete the entire procedure is approximately one hour.

WARNING. Some procedures use hazardous voltages. To prevent electrical shock,
always set voltage source outputs to 0 V before making or changing any
interconnections.

Performance Verification

Self Test

Self Calibration

Check DC Gain Accuracy

This internal procedure is automatically performed every time the oscilloscope is
powered on. No test equipment or hookups are required. Verify that no error
messages are displayed before continuing with this procedure.

The self calibration routine lets you quickly optimize the oscilloscope signal path
for maximum measurement accuracy. You can run the routine at any time, but
you should always run the routine if the ambient temperature changes by 5 _Cor
more.

1. Remove signals from all channels.

2. Press the UTILITY button and select the Do Self Cal option to start the

calibration. This routine can take up to five minutes to complete.

3. Verify that self calibration passed.

This test checks the DC gain accuracy of all input channels.

1. Set the DC voltage source output level to 0V.

2. Set up the oscilloscope using the following steps:

Press menu button Select menu option Select setting

1. DEFAULT SETUP — —

2. CH 1 (or whatever channel
is currently being tested).

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Voltage Probe 1X

4- 3

Performance Verification

Press menu button Select settingSelect menu option

3. ACQUIRE Average 16

4. MEASURE

Source An unchecked channel

Type Mean

3. As shown below, connect the oscilloscope channel selected in the table to the

DC voltage source.

DC voltage

source

+--

Dual banana
to BNC
adapter

BNC cable

Digitizing oscilloscope

4. For each VOLTS/DIV setting listed below, perform the following steps:

a. Set the DC voltage source output level to the positive voltage listed and

then record the mean measurement as V

pos

.

b. Reverse the polarity of the DC voltage source and then record the mean

measurement as V

c. Calculate V

diff=Vpos

neg

.

-- V

and then compare V

neg

to the accuracy

diff

limits in the table.

VOLTS/DIV setting DC voltage source output levels Accuracy limits for V

5mV/div +17.5 mV, --17.5 mV 33.6 mV to 36.4 mV

200 mV/div +700 mV, --700 mV 1.358 V to 1.442 V

2V/div +7.00 V, --7.00 V 13.58 V to 14.42 V

5. Set DC voltage source output level to 0V.

6. Disconnect the test setup.

7. Repeat steps 1 through 6 until all input channels have been checked. For

example, check CH1 the first time through and CH2 the next time. On a
four-channel model, then test CH3 and CH4.

diff

4- 4

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Performance Verification

Check Bandwidth

This test checks the bandwidth of all input channels.

1. Set up the oscilloscope using the following steps:

Press menu button Select menu option Select setting

DEFAULT SETUP — —

CH 1 (or whatever channel is
currently being tested).

ACQUIRE Average 16

TRIGGER Coupling Noise

MEASURE

Voltage Probe 1X

Source An unchecked channel

Type Pk-Pk

2. As shown below, connect the oscilloscope channel selected in the table to the

leveled sine wave generator.

Leveled
sine wave
generator

Digitizing oscilloscope

Output

50 Ω feedthrough

BNC cable

terminator

3. Set the oscilloscope VOLTS/DIV to 500 mV/div.

4. Set the oscilloscope SEC/DIV to 10 s/div.

5. Set the leveled sine wave generator frequency to 50 kHz.

6. Set the leveled sine wave generator output level so the peak-to-peak
measurement is between 2.98 V and 3.02 V.

7. Set the leveled sine wave generator frequency to:

H 100 MHz if you are checking a TPS2012/2014

H 200 MHz if you are checking a TPS2024.

8. Set the oscilloscope SEC/DIV to 10 ns/div.

9. Check that the peak-to-peak measurement is ≥2.12 V.

TPS2000 Series Digital Storage Oscilloscopes Service Manual

4- 5

Performance Verification

10. Disconnect the test setup.

11. Repeat steps 1 through 10 until all input channels have been checked.

Check Sample Rate and

Delay Time Accuracy

This test checks the time base accuracy.

1. Set up the oscilloscope using the following steps:

Press menu button Select menu option Select setting

DEFAULT SETUP — —

CH 1 (or whatever channel is
currently being tested).

Voltage Probe 1X

2. Connect the oscilloscope to the time mark generator as shown below.

Time mark

generator

Output

BNC cable

Digitizing oscilloscope

50 Ω feedthrough
terminator

4- 6

3. Set the time mark generator period to 10 ms.

4. Set the oscilloscope VOLTS/DIV to 500 mV/div.

5. Set the oscilloscope Main SEC/DIV to 1ms/div.

6. Press SET LEVEL TO 50%.

7. Use the vertical POSITION control to center the test signal on screen.

8. Use the horizontal POSITION control to set the position to 10.00 ms.

9. Set the oscilloscope SEC/DIV to 250 ns/div.

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Performance Verification

10. Check that the rising edge of the marker crosses the center horizontal
graticule line within ±2 divisions of center graticule.

NOTE. One division of displacement from graticule center corresponds to
a 25 ppm time base error.

11. Disconnect the test setup.

Check Edge Trigger

Sensitivity

This test checks the edge trigger sensitivity for all input channels.

1. Set up the oscilloscope using the following steps:

Press menu button Select menu option Select setting

DEFAULT SETUP — —

CH 1 (or whatever channel is
currently being tested).

TRIGGER Mode Normal

ACQUIRE Sample —

MEASURE

Voltage Probe 1X

Source An unchecked channel

Type Pk-Pk

2. As shown below, connect the oscilloscope channel selected in the table to the
leveled sine wave generator.

Leveled
sine wave
generator

Digitizing oscilloscope

Output

BNC cable

3. Set the oscilloscope VOLTS/DIV to 500 mV/div.

4. Set the oscilloscope SEC/DIV to 25 ns/div.

TPS2000 Series Digital Storage Oscilloscopes Service Manual

50 Ω feedthrough
terminator

4- 7

Performance Verification

5. Set the leveled sine wave generator frequency to 10 MHz.

6. Set the leveled sine wave generator output level to approximately 500 mV

p-p

so that the measured amplitude is approximately 500 mV. (The measured
amplitude can fluctuate around 500 mV.)

7. Press SET LEVEL TO 50%. Adjust TRIGGER LEVEL as necessary and

then check that triggering is stable.

8. Set the leveled sine wave generator frequency to the following:

H 100 MHz if you are checking a TPS2012/2014

H 200 MHz if you are checking TPS2024.

9. Set the oscilloscope SEC/DIV to 10 ns/div.

10. Set the leveled sine wave generator output level to approximately 750 mV

p-p

so that the measured amplitude is approximately 750 mV. (The measured
amplitude can fluctuate around 750 mV.)

11. Press SET LEVEL TO 50%. Adjust TRIGGER LEVEL as necessary and

then check that triggering is stable.

12. Change the oscilloscope setup using the following step:

Press menu button Select menu option Select setting

TRIGGER Slope Falling

Check External Edge

Trigger Sensitivity

4- 8

13. Press SET LEVEL TO 50%. Adjust TRIGGER LEVEL as necessary and

then check that triggering is stable.

14. Disconnect the test setup.

15. Repeat steps 1 through 14 until all input channels have been checked.

This test checks the edge trigger sensitivity for the external trigger.

1. Set up the oscilloscope using the following steps:

Press menu button Select menu option Select setting

DEFAULT SETUP — —

CH 1 (or whatever channel is
currently being tested).

TRIGGER

Voltage Probe 1X

Source Ext

Mode Normal

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Press menu button Select settingSelect menu option

ACQUIRE Sample —

Performance Verification

MEASURE

Source CH1

Type Pk-Pk

2. Connect the oscilloscope to the leveled sine wave generator as shown below.

Leveled
sine wave

generator

Output

Power divider

Male SMA to
female BNC

SMA female-­to--female

Digitizing oscilloscope

3Pieces

50 Ω

feedthrough

terminator

3. Set the leveled sine wave generator frequency to the following:

H 100 MHz if you are checking a TPS2012/2014

H 200 MHz if you are checking TPS2024.

4. Set the oscilloscope VOLTS/DIV to 500 mV/div.

5. Set the oscilloscope SEC/DIV to 10 ns/div.

6. Set the leveled sine wave generator output level to approximately 1 V

p-p

so

that the measured amplitude is approximately 1V. (The measured amplitude
can fluctuate around 1 V.)

7. Press SET LEVEL TO 50%. Adjust TRIGGER LEVEL as necessary and

then check that triggering is stable.

8. Change the oscilloscope setup using the following step:

Press menu button Select menu option Select setting

TRIGGER Slope Falling

TPS2000 Series Digital Storage Oscilloscopes Service Manual

4- 9

Performance Verification

9. Press SET LEVEL TO 50%. Adjust TRIGGER LEVEL as necessary and

then check that triggering is stable.

10. Disconnect the test setup.

4- 10

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Adjustment Procedures

Adjustment Procedures

This section contains an adjustment procedures for the TPS2000 Series
oscilloscopes.

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

NOTE. The voltage references inside TPS2000 Series oscilloscopes are very
stable over time and should not require routine updates. Before performing any
procedure in this chapter, first verify that the oscilloscope does not meet
specifications. Refer to the chapter Performance Verification to verify the
specifications.

Required Equipment

The equipment described in Table 5--1, or a suitable equivalent, is required to
complete the procedure.

Table 5- 1: Required equipment

Description Minimum requirements Examples

DC Voltage Source --20Vto20V,±0.1%

accuracy

Leveled Sine Wave
Generator

50 Ω BNC Cable BNCmaletoBNCmale,

50 Ω BNC Cable (two) BNCmaletoBNCmale,

50 Ω Feedthrough
Termination

Dual Banana to BNC
Adapter

BNC T One male and two female

60 kHz and 200 MHz, ±0.6%
amplitude accuracy

≈ 1 m (36 in) long

≈ 25 cm (10 in) long

BNC male and female
connectors

Banana plugs to BNC female Tektronix part number 103-0090-00

BNC connectors

Wavetek 9100 Universal Calibration
System with Oscilloscope
Calibration Module (Option 250)

Fluke 5500AMulti-product
Calibrator with Oscilloscope
Calibration Option
(Option 5500A-SC)

Tektronix part number 012-0482-00

Tektronix part number 012-0208-00

Tektronix part number 011-0049-01

Tektronix part number 103-0030-00

TPS2000 Series Digital Storage Oscilloscopes Service Manual

5- 1

Adjustment Procedures

Adjustment Procedure

The adjustment procedure consists of multiple steps for the two-channel
oscilloscope, and additional steps for the four-channel model. Each step requires
an external voltage source for new calibration constants.

Before performing the adjustment procedure, you must warm up the oscilloscope
for at least ten minutes in an ambient temperature between 20 °C and 30 °C.
Adjustments performed prior to warm-up or outside this temperature range may
result in poor performance.

If all steps in the procedures are completed successfully, a “Pass” message is
displayed and the new calibration constants take affect. If any step fails, the
procedure is aborted and the current calibration is not affected. You can choose to
abort the procedures at any step by selecting FCAL ABORT without affecting
the current calibration.

NOTE. While performing the adjustment procedure, keep in mind that some of the
steps take a significant amount of time (up to 5 minutes) to complete.

Enable the Service Menu

The equipment setups, shown in Figure 5--1, are required to complete the
adjustment procedure. Table 5--2 on page 5--5 lists the steps in the procedure
and the signal requirement for each step.

You must enable the Service menu to perform the adjustment procedure.

1. Power on the oscilloscope.

2. Push the front-panel MEASURE button to access the MEASURE menu.

3. Push the top option button to access the Measure 1 menu.

4. Push and hold the front-panel SINGLE SEQ button.

5. Push and hold the front-panel AUTOSET button.

6. Wait at least two seconds.

7. Release the SINGLE SEQ button.

8. Release the AUTOSET button. A message appears in the lower left corner

of the screen stating “Service mode ON.”

9. Push the front-panel UTILITY button. The last item in the Utility menu is

now Service.

5- 2

You may now begin executing the sequence of calibration steps required by your
oscilloscope and shown below. After the adjustment is complete, disable the
Service menu by pushing the UTILITY front-panel button, and the Service and
Service Mode Off option buttons.

TPS2000 Series Digital Storage Oscilloscopes Service Manual

DC voltage setup 1

DC voltage source

Adjustment Procedures

Two Channel

Digitizing oscilloscope

+--

Dual banana to
BNC adapter

BNC cable

BNC cable

10-inch

BNC cables

BNC ‘T’ connector

Four Channel

Digitizing oscilloscope

10-inch

BNC cables

10-inch

BNC cable

BNC ‘T’ connector

10-inch BNC cable

10-inch

BNC cables

BNC ‘T’

connectors

DC voltage setup 2

Sine wave generator setup

Leveled sine

wave generator

Output

50 Ω feedthrough terminator

(Table 5--2 and 5--3 list proper

DC voltage source

+--

Two Channel

Digitizing oscilloscope

channel)

Dual banana to
BNC adapter

Two Channel

Digitizing oscilloscope

BNC cable

Edge setup

Square wave

generator

Four Channel

Digitizing oscilloscope

Output

50 Ω feedthrough terminator

(Table 5--2 and 5--3 list proper

channel)

BNC cable

Figure 5- 1: Adjustment setups

TPS2000 Series Digital Storage Oscilloscopes Service Manual

BNC cable

5- 3

Adjustment Procedures

Adjustment Procedure

Use this procedure to load new calibration constants.

1. Enable the Service menu as described on page 5--2.

2. Push the Service option button.

3. Push the Factory Cal option button.

4. Push the Warmup Timer option button.

5. Push the Start Timer option button to ensure a 10-minute warm up. After

10 minutes passes, the oscilloscope displays a large black or green cross.

6. Press the front-panel UTILITY button and push the Service option button.

7. Push the Factory Cal option button.

8. Push the FCAL INIT option button to initiate the factory calibration

routine. You are now in step 1 of the procedure.

9. As indicated by Step 1 in Table 5--2, connect a 0.0 V

source to the channel

DC

inputs.

10. Press FCAL STEP to load the calibration constant for step 1.

11. Follow the screen prompts along with Table 5--2 for the remainder of the

routine, applying the proper signal for each step.

NOTE. During some steps, the oscilloscope may appear to be idle for several
minutes while it is processing information internally. You must wait for the
screen prompt to continue.

NOTE. In Table 5--2, “BWL” stands for the bandwidth limit of the particular
oscilloscope. If the oscilloscope is a TPS2012 or a TPS2014, the oscilloscope
has a bandwidth limit of 100 MHz. If the oscilloscope is a TPS2024, the
bandwidth limit is 200 MHz.

If any step in the procedure fails, the procedure terminates. Failure will result
if an incorrect signal source is connected. If this happens, you must start the
procedure over from the beginning.

If the procedure completes successfully, a “Pass” message is displayed and
the new adjustment takes effect.

12. Compensate the signal path by performing the self-calibration routine.

Disconnect any probes or cables from the channel input connectors. Then,
press the UTILITY button and select Do Self Cal to confirm that you are
ready to proceed.

5- 4

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Table 5- 2: Adjustment steps

g

Adjustment Procedures

13. Disable the Service menu option by pushing the UTILITY front-panel
button, and the Service and Service Mode Off option buttons.

Step
Two-channel
models

Refer to the DC voltage setup 1 diagram

1 1 DC Voltage 1 0.0 V

2 2 DC Voltage 1 --20.0 V

3 3 DC Voltage 1 -- 2 . 0 V

4 4 DC Voltage 1 -- 1 . 6 V

5 5 DC Voltage 1 -- 1 . 2 V

6 6 DC Voltage 1 -- 0 . 8 V

7 7 DC Voltage 1 -- 0 . 4 V

8 8 DC Voltage 1 --0.32 V

9 9 DC Voltage 1 -- 0 . 2 V

10 10 DC Voltage 1 --0.16 V

11 11 DC Voltage 1 --0.08 V

12 12 DC Voltage 1 --0.04 V

13 13 DC Voltage 1 --0.03 V

14 14 DC Voltage 1 --0.02 V

15 15 DC Voltage 1 --0.015 V

16 16 DC Voltage 1 0.015 V

17 17 DC Voltage 1 0.02 V

18 18 DC Voltage 1 0.03 V

19 19 DC Voltage 1 0.04 V

20 20 DC Voltage 1 0.08 V

21 21 DC Voltage 1 0.16 V

22 22 DC Voltage 1 0.2 V

23 23 DC Voltage 1 0.32 V

24 24 DC Voltage 1 0.4 V

25 25 DC Voltage 1 0.8 V

26 26 DC Voltage 1 1.2 V

27 27 DC Voltage 1 1.6 V

28 28 DC Voltage 1 2.0 V

29 29 DC Voltage 1 20.0 V

30 30 DC Voltage 1 0.0 V

Step
Four-channel
models

Signal Signal source setting Input

CH1 through
CHx

TPS2000 Series Digital Storage Oscilloscopes Service Manual

5- 5

Adjustment Procedures

S

ineWaveG

O

hmBWL

V

5252SineWaveGenerator,50OhmBW

L,2.5

V

p-p

5353SineWaveGenerator,50OhmBW

L,5

V

p-p

Table 5- 2: Adjustment steps (Cont.)

Step
Two-channel
models

Step
Four-channel
models

Refer to the DC voltage setup 2 diagram

31 31 DC Voltage 2 --25.0 V

32 32 DC Voltage 2 --12.5 V

33 33 DC Voltage 2 -- 2 . 5 V

34 34 DC Voltage 2 2.5 V

35 35 DC Voltage 2 12.5 V

36 36 DC Voltage 2 25 V

Refer to the sine wave generator setup diagram. BWL refers the maximum bandwidth of the oscilloscope.

37 37 Sine Wave Generator, 50 Ohm 5 kHz, 1 V

38 38 Sine Wave Generator, 50 Ohm 1 MHz, 100 mV

39 39 Sine Wave Generator, 50 Ohm 1MHz,1V

40 40 Sine Wave Generator, 50 Ohm 50 kHz, 1.2 V

41 41 Sine Wave Generator, 50 Ohm 20 MHz, 1.2 V

42 42

enerator, 50

43 43 Sine Wave Generator, 50 Ohm BWL, 60 mV

44 44 Sine Wave Generator, 50 Ohm BWL, 120 mV

45 45 Sine Wave Generator, 50 Ohm BWL, 300 mV

46 46 Sine Wave Generator, 50 Ohm BWL, 600 mV

47 47 Sine Wave Generator, 50 Ohm BWL, 1.2 V

48 48 Sine Wave Generator, 50 Ohm 5 kHz, 2.5 V

49 49 Sine Wave Generator, 50 Ohm 1MHz,2.5V

50 50 Sine Wave Generator, 50 Ohm 50 kHz, 2.5 V

51 51 Sine Wave Generator, 50 Ohm 20 MHz, 2.5 V

,30m

p-p

p-p

p-p

p-p

p-p

p-p

p-p

p-p

p-p

p-p

p-p

p-p

p-p

p-p

p-p

InputSignal source settingSignal

EXT TRIG

CH1

54 54 Sine Wave Generator, 50 Ohm BWL, 1.6 V

55 55 Edge, 50 Ohm. Refer to Edge setup

1 kHz, 0 to --800 mV, fast rising edge

p-p

diagram.

5- 6

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Table 5- 2: Adjustment steps (Cont.)

S

ineWaveG

O

hmBWL

V

7171SineWaveGenerator,50OhmBW

L,2.5

V

p-p

7272SineWaveGenerator,50OhmBW

L,5

V

p-p

Adjustment Procedures

Step
Two-channel
models

56 56 Sine Wave Generator, 50 Ohm 5 kHz, 1 V

Step
Four-channel
models

p-p

57 57 Sine Wave Generator, 50 Ohm 1 MHz, 100 mV

58 58 Sine Wave Generator, 50 Ohm 1MHz,1V

p-p

59 59 Sine Wave Generator, 50 Ohm 50 kHz, 1.2 V

60 60 Sine Wave Generator, 50 Ohm 20 MHz, 1.2 V

61 61

62 62 Sine Wave Generator, 50 Ohm BWL, 60 mV

enerator, 50

,30m

p-p

p-p

63 63 Sine Wave Generator, 50 Ohm BWL, 120 mV

64 64 Sine Wave Generator, 50 Ohm BWL, 300 mV

65 65 Sine Wave Generator, 50 Ohm BWL, 600 mV

66 66 Sine Wave Generator, 50 Ohm BWL, 1.2 V

67 67 Sine Wave Generator, 50 Ohm 5 kHz, 2.5 V

68 68 Sine Wave Generator, 50 Ohm 1MHz,2.5V

p-p

p-p

p-p

69 69 Sine Wave Generator, 50 Ohm 50 kHz, 2.5 V

70 70 Sine Wave Generator, 50 Ohm 20 MHz, 2.5 V

InputSignal source settingSignal

CH2

p-p

p-p

p-p

p-p

p-p

p-p

p-p

p-p

TPS2000 Series Digital Storage Oscilloscopes Service Manual

5- 7

Adjustment Procedures

S

ineWaveG

O

hmBWL

V

88SineWaveGenerator,50OhmBW

L,2.5

V

p-p

89SineWaveGenerator,50OhmBW

L,5

V

p-p

Table 5- 2: Adjustment steps (Cont.)

Step
Two-channel
models

NA

Step
Four-channel
models

73 Sine Wave Generator, 50 Ohm 5 kHz, 1 V

p-p

74 Sine Wave Generator, 50 Ohm 1 MHz, 100 mV

75 Sine Wave Generator, 50 Ohm 1MHz,1V

p-p

76 Sine Wave Generator, 50 Ohm 50 kHz, 1.2 V

77 Sine Wave Generator, 50 Ohm 20 MHz, 1.2 V

78

79 Sine Wave Generator, 50 Ohm BWL, 60 mV

enerator, 50

,30m

p-p

p-p

80 Sine Wave Generator, 50 Ohm BWL, 120 mV

81 Sine Wave Generator, 50 Ohm BWL, 300 mV

82 Sine Wave Generator, 50 Ohm BWL, 600 mV

83 Sine Wave Generator, 50 Ohm BWL, 1.2 V

84 Sine Wave Generator, 50 Ohm 5 kHz, 2.5 V

85 Sine Wave Generator, 50 Ohm 1MHz,2.5V

p-p

p-p

p-p

86 Sine Wave Generator, 50 Ohm 50 kHz, 2.5 V

87 Sine Wave Generator, 50 Ohm 20 MHz, 2.5 V

InputSignal source settingSignal

CH3

p-p

p-p

p-p

p-p

p-p

p-p

p-p

p-p

90 Sine Wave Generator, 50 Ohm BWL, 1.6 V

91 Edge, 50 Ohm. Refer to Edge setup

1 kHz, 0 to --800 mV, fast rising edge

diagram.

p-p

5- 8

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Table 5- 2: Adjustment steps (Cont.)

S

ineWaveG

O

hmBWL

V

Wav

V

107SineWaveGenerato

r,50OhmBW

L,2.5

V

p-p

Wav

V

108SineWaveGenerato

r,50OhmBW

L,5

V

p-p

Adjustment Procedures

Step
Two-channel
models

NA

Step
Four-channel
models

92 Sine Wave Generator, 50 Ohm 5 kHz, 1 V

p-p

93 Sine Wave Generator, 50 Ohm 1 MHz, 100 mV

94 Sine Wave Generator, 50 Ohm 1MHz,1V

p-p

95 Sine Wave Generator, 50 Ohm 50 kHz, 1.2 V

96 Sine Wave Generator, 50 Ohm 20 MHz, 1.2 V

97

98 Sine Wave Generator, 50 Ohm BWL, 60 mV

enerator, 50

,30m

p-p

p-p

99 Sine Wave Generator, 50 Ohm BWL, 120 mV

100 Sine Wave Generator, 50 Ohm BWL, 300 mV

101 Sine Wave Generator, 50 Ohm BWL, 600 mV

102 Sine Wave Generator, 50 Ohm BWL, 1.2 V

103 Sine Wave Generator, 50 Ohm 5 kHz, 2.5 V

104 Sine Wave Generator, 50 Ohm 1MHz,2.5V

p-p

p-p

p-p

105 Sine Wave Generator, 50 Ohm 50 kHz, 2.5 V

InputSignal source settingSignal

CH4

p-p

p-p

p-p

p-p

p-p

p-p

p-p

106 Sine Wave Generator, 50 Ohm 20 MHz, 2.5 V

107 Sine

108 Sine

e Generator, 50 Ohm BWL, 2.5

e Generator, 50 Ohm BWL, 5

-

p-p

-

TPS2000 Series Digital Storage Oscilloscopes Service Manual

5- 9

Adjustment Procedures

5- 10

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Maintenance

Maintenance

Preparation

This section contains the following information that is needed to perform
periodic and corrective maintenance on TPS2000 Series oscilloscopes:

H Preparation tells you how to get ready to do oscilloscope maintenance.

H Preventing ESD provides general information on preventing damage to

internal modules when doing maintenance.

H Inspection and Cleaning provides procedures for inspecting the oscilloscope

and cleaning its external and internal modules.

H Removal and Installation Procedures provides procedures for the removal

and installation of modules.

H Troubleshooting provides information for isolating failed modules.

H Repackaging Instructions provides packaging information for shipment or

storage.

Preventing ESD

Only qualified personnel should perform service procedures. Read the Service
Safety Summary and the General Safety Summary sections of this manual before

performing any service procedures. Also refer to the Operating Information
section and your oscilloscope user manual for information about using the
oscilloscope.

When performing any service which requires internal access to the oscilloscope,
adhere to the following precautions. These precautions will help you avoid
damaging internal modules and their components due to electrostatic discharge
(ESD).

CAUTION. Static discharge can damage any semiconductor component in this
oscilloscope.

H Minimize handling of static-sensitive modules.

H Transport and store static-sensitive modules in their static protected

containers or on a metal rail. Label any package that contains static-sensitive
modules.

TPS2000 Series Digital Storage Oscilloscopes Service Manual

6--1

Maintenance

Inspection and Cleaning

H Discharge the static voltage from your body by wearing a grounded antistatic

wrist strap while handling these modules.

H Service static-sensitive modules only at static-free workstations. Do not

allow anything capable of generating or holding a static charge on the
workstation surface.

H Handle circuit boards by the edges when possible.

H Do not slide the modules over any surface.

H Avoid handling modules in areas that have a floor or work-surface covering

capable of generating a static charge.

This section describes how to inspect for dirt and damage, and how to clean the
oscilloscope. Inspection and cleaning are done as preventive maintenance which,
when done regularly, may prevent malfunctions and enhance reliability.

General Care

Inspection and Cleaning

Procedures

Preventive maintenance consists of visually inspecting and cleaning the
oscilloscope, and using general care when operating it. Perform preventive
maintenance more often if you operate the oscilloscope in a severe environment.
A good time to perform preventive maintenance is just before adjustment of the
oscilloscope.

For optimum performance, follow these recommendations:

H Protect the oscilloscope from adverse weather conditions. The oscilloscope is

not waterproof.

H Do not store or leave the oscilloscope where the liquid crystal display (LCD)

will be exposed to direct sunlight or high humidity for long periods of time.

H The front and rear cases help keep dust out of the oscilloscope and must be in

place during normal operation.

H To avoid damage to the oscilloscope or probes, do not expose them to any

sprays, liquids, or solvents.

The accumulation of dirt on internal components can cause them to overheat and
fail. Dirt also provides an electrical conduction path that could cause an oscillo­scope failure, especially under high-humidity conditions. Inspect and clean the
oscilloscope and probes as often as operating conditions require.

6--2

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Maintenance

Inspection, Exterior. Inspect the outside of the oscilloscope for damage, wear, and
missing parts. Oscilloscopes that appear to have been dropped or otherwise
abused should be checked thoroughly to verify correct operation and perfor­mance. Immediately repair defects that could cause personal injury or lead to
further damage to the oscilloscope.

Cleaning Procedure, Exterior. To clean the oscilloscope exterior and probes:

1. Remove loose dust on the outside of the oscilloscope and probes with a
lint-free cloth. Use care to avoid scratching the clear glass display shield.

2. Use a soft cloth dampened with water to clean the oscilloscope, or use a 75%
isopropyl alcohol solution for more efficient cleaning.

CAUTION. To prevent getting moisture inside the oscilloscope during external
cleaning, use only enough liquid to dampen the cloth or applicator.

To avoid damage to the surface of the oscilloscope or probes, do not use any
abrasive or chemical cleaning agents.

Inspection, Interior. Inspect and clean the interior if it appears that the oscillo­scope may have been damaged or exposed to an unusually dirty environment.

To inspect and clean the interior, disassemble the oscilloscope by completing
each of the disassembly procedures in the order given starting on page 6--5.

Inspect the internal portions of the oscilloscope for damage and wear using
Table 6--1 as a guide. Repair defects immediately.

Table 6--1: Internal inspection check list

Item Inspect for Repair action

Front and
Rear Case

Circuit boards Loose, broken, or corroded solder connec-

Solder
connections

Wiring and
cables

Cracks or deformations. Scratched lettering
or display filter. Loose connectors or labels.

tions. Burned circuit boards. Burned,
broken, or cracked circuit-run plating.

Cold solder or rosin joints. Resolder joint and clean with

Loose plugs or connectors. Burned, broken,
or frayed wiring.

Repair or replace defective
hardware.

Remove failed module and
replace with a new module.

isopropyl alcohol.

Firmly seat connectors. Repair or
replace modules with defective
wires or cables.

TPS2000 Series Digital Storage Oscilloscopes Service Manual

6--3

Maintenance

Cleaning Procedure, Interior. To clean the oscilloscope interior, perform the
following steps:

1. Blow off dust with dry, low-pressure, deionized air (approximately 9 psi).

2. Remove any remaining dust with a lint-free cloth dampened in isopropyl

alcohol (75% solution) and then wipe with a lint-free cloth dampened with
warm deionized water. A cotton-tipped applicator is useful for cleaning in
narrow spaces and on circuit boards.

STOP. If, after performing steps 1 and 2, a module is clean upon inspection, skip
steps 3 and 4. Proceed with step 5.

If steps 1 and 2 do not remove all the dust or dirt, all modules in the oscilloscope
except the Display Module and Front Panel Module may be spray washed using
a solution of 75% isopropyl alcohol.

Extensive cleaning of the Display Module is difficult because water must not be
trapped between the display shield and the display. The polarizers integrated into
the display degrade with long-term exposure to water. The display shield and
display must be replaced as an assembly if significant moisture or debris become
trapped inside. Cotton tipped applicators and lint-free rags moistened in
isopropyl alcohol and/or deionized water offer the best cleaning with the least
opportunity for damage to the assembly.

The Front Panel Module can be damaged by deposition of film or debris inside
the knob encoders. To avoid this, care must be taken to not drip liquid or blow
debris into the encoders.

Proceed with step 3.

3. Spray wash dirty parts with the 75% isopropyl alcohol solution and wait 60
seconds for the majority of the alcohol to evaporate.

4. Use hot (49 _Cto60_C / 120 _F to 140 _F) deionized water to thoroughly
rinse the parts.

5. Dry all parts with low-pressure, deionized air.

6. Dry all components and assemblies in an oven or drying compartment using

low-temperature (52 _Cto66_C / 125 _F to 150 _F) circulating air.

Lubrication. Periodic lubrication is not required for the oscilloscope.

6--4

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Removal and Installation Procedures

This section describes how to remove and install the major mechanical and
electrical modules of the oscilloscope. It provides the following information:

H Replacement Procedures. Page 6--6 lists the procedures for removal and

installation of major modules.

H Tools Required. Page 6--6 describes the tools needed to perform these

procedures.

Maintenance

Preparation

Read this section to prepare for module removal and installation.

WARNING. Only qualified personnel should perform service procedures. Before
doing this or any other procedure in this manual, read the General Safety
Summary and Service Safety Summary found at the beginning of this manual.

Always disconnect the power cord before disassembling any portion of the
oscilloscope.

To prevent damage to electrical components, read Preventing ESD on page 6--1.

H See Figure 8--1 on page 8--6 for an overview of how the entire oscilloscope is

assembled.

H Read the Replacement Procedures on page 6--6 to understand what

procedure to use to access a given module.

H Read Tools Required on page 6--6 for a list of tools needed to remove and

install modules in the oscilloscope.

H If you are disassembling the oscilloscope for cleaning, refer to Inspection

and Cleaning on page 6--2 for cleaning instructions.

List of Modules

Replacement Procedures

TPS2000 Series Digital Storage Oscilloscopes Service Manual

The Replaceable Parts section, beginning on page 8--1, lists all of the replaceable
modules.

Disassembly for replacement is best achieved by removing and replacing the
modules in a specified order.

6--5

Maintenance

To remove and replace the fan, backlight inverter board, or IO board, refer to
Table 6--2.

Table 6--2: Procedures for module replacement by removing the rear case

Remove module See procedure on

Rear case (Remove for following procedures.) Page 6--7

Fan Page 6--9

Backlight inverter board Page 6--9. Remove fan first.

IO board Page 6--10

To remove and replace the acquisition board, front panel board, LCD display,
compact flash module, or keypad, refer to Table 6--3.

Table 6--3: Procedures for module replacement by removing the front case

Tools Required

Remove module See procedure on

Front case (Remove for following procedures.) Page 6--11

Acquisition board Page 6--14. Remove IO board first.

Front panel board Page 6--16

Display module Page 6--17. Remove front panel board first.

Compact flash module Page 6--18. Remove acquisition board first.

Keypad Page 6--18

Use the following tools to remove and replace modules in the oscilloscope:

H Torque-limiting screwdriver, long shank, 8 in-lb (.85 N

⋅m) range with Torx®

T-15 tip

H 16 mm (5/8 inch) deep socket with wide center hole (S

⋅K Hand Tool Corp.,

S-K #40818, or equivalent)

H Torque wrench to 40 in-lb (4.5 N

⋅m)

H Screwdriver with 1/4 inch (6.35 mm) flat blade

H Pliers (all-purpose and needle-nose)

6--6

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Maintenance

Rear Case

You will need a torque-limiting Torx T-15 screwdriver for this procedure.

Removal. To remove the rear case, refer to Figure 6--1 on page 6--8 and follow
these steps:

1. Open the battery door and remove the batteries.

2. Place the oscilloscope face down on a soft surface, such as an anti-static mat.

3. Remove the five screws that secure the rear case to the chassis. Tilt the

handle to gain better access to the top two screws.

4. Lift up and remove the rear case from the oscilloscope chassis.

Installation. Refer to Figure 6--1 and follow these procedure to reinstall the rear
case.

1. Place the oscilloscope face down on a soft surface.

2. Ensure that all cables are routed within the internal chassis area.

3. Place the rear case over the assembled oscilloscope and ensure that:

H All edges align with the chassis.

H The RS-232, printer, and power connectors align and feed through the

rear case without binding.

4. Install the five screws to secure the rear case. Tilt the handle to better access
the top two holes.

5. Install the batteries.

CAUTION. Avoid cross threading the screws that attach the rear case to the front
case. An easy way to avoid this is to slip the screw into the hole and, using slight
pressure, slowly rotate the screw counterclockwise until you feel the screw slip
into the screw threads. Then tighten the screw clockwise. A properly started
screw will have very little resistance going in.

TPS2000 Series Digital Storage Oscilloscopes Service Manual

6--7

Maintenance

Rear case screws (5)

Rear case

6--8

Figure 6--1: Removing and installing the rear case

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Maintenance

Fan

Backlight Inverter Board

You will need the pliers for this procedure.

Removal. To remove the fan, refer to Figure 6--2 on page 6--10 and follow these
steps:

1. Remove the rear case. Follow the procedure on page

6--7.

2. Disconnect the fan cable from the IO board.

3. Use the pliers to bend the two fan-bracket tabs out of the way.

4. Remove the fan.

Installation. To install a new fan, refer to F igure 6--2 and follow these steps:

1. Align the fan bracket with the fan. Align the fan so that air blows out the side
of the chassis, not into the chassis.

2. Use the pliers to bend the two fan-bracket tabs into place and secure the fan.

3. Install the fan cable on the IO board.

4. Install the rear case.

You will need the pliers for this procedure.

Removal. To remove the backlight inverter board, refer to Figure 6--2 on page
6--10 and follow these steps:

1. Remove the rear case. Follow the procedure on page

6--7.

2. Disconnect the display inverter cable from the IO board.

3. Disconnect the LCD inverter cable from the backlight inverter board.

4. Use the pliers to bend the two chassis-mounting tabs out of the way.

5. Remove the board.

Installation. To install a new backlight inverter board, refer to Figure 6--2 and
follow these steps:

1. Align the backlight inverter board with the chassis mounting tabs.

2. Use the pliers to bend the tabs into place and secure the board.

3. Connect the display cable to the backlight inverter board

4. Connect the display inverter cable to the IO board.

5. Install the rear case.

TPS2000 Series Digital Storage Oscilloscopes Service Manual

6--9

Maintenance

IO Board

To remove the IO board, refer to Figure 6--2 on page 6--10 and follow these steps:

1. Remove the rear case. Follow the procedure on page

6--7.

2. Disconnect all cables from the IO board.

3. Remove the three chassis mounting screws from the IO board.

4. Unseat the IO board from its connector on the acquisition board and lift up to

remove the board.

Installation. To install a new IO board, refer to Figure 6--2 and follow these steps:

1. Align the connector on the bottom of the IO board with the connector on the
acquisition board. Press down to seat the connector.

2. Install the three IO board mounting screws to attach the board to the support
bracket.

3. Connect all cables to the IO board.

4. Install the rear case.

Fan

Cables

I/O board screws (3)

IO board

Backlight

Inverter board

Display data cable

Acquisition board

Figure 6--2: Modules accessed from the rear of the oscilloscope

6--10

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Maintenance

Front-Panel Knob

Front Case

Remove each front-panel knob by firmly grasping the knob and pulling it off of
the front panel. If necessary, insert a screw driver between the front panel and
knob and lift up.

Install the front-panel knobs by aligning the keyed knob with the shaft, and then
press the knob onto the shaft.

You will need a torque-limiting Torx T-15 screwdriver and 16 mm (5/8 inch)
deep socket for this procedure.

Removal. To remove the front case, refer to Figure 6--4 on page 6--13 and follow
these steps:

1. Remove the front-panel knobs. Follow the procedure on page NO TAG.

2. Place the oscilloscope with its rear case down on a soft surface, such as an

anti-static mat.

3. Remove the BNC cover by prying up on the exposed edge.

4. Use the 16 mm (5/8 inch) deep socket to remove the nuts from the BNC

connectors.

5. Remove the plastic BNC shells from the BNC connectors. Grasp the BNC
shell with your fingers and pull up to remove the shell. See figure 6--3.

Plastic BNC shell

0.625” BNC nut

BNC cover

Figure 6--3: Removing the BNC cover, shell, and retaining nuts

6. Follow the procedures on page 6--7 to remove the rear case.

7. Remove the four screws from the internal chassis that attach the chassis to

the front cover. See Figure 6--4.

8. Lift the chassis off of the front case.

TPS2000 Series Digital Storage Oscilloscopes Service Manual

6--11

Maintenance

Installation. To install the front case, refer to Figure 6--4 and follow these steps:

1. Place the front case face down on a soft surface.

2. Ensure that the switch keypad is aligned and feeds through the front case.

Follow the procedure on page 6--19.

3. Align the power switch, BNC connectors, and knob shafts so they feed
through the front case.

4. Lower the chassis onto the front case.

5. Install the four screws on the inside of the chassis that attach the chassis to

the front cover. See Figure 6--4.

6. Follow the procedures on page 6--7 to install the rear case.

7. Install the plastic BNC shells onto the BNC connectors.

8. Use the 16 mm (5/16 inch) deep socket and install the BNC nuts onto the

BNC connectors. Torque the nuts to 40 in-lbs using the torque wrench.

9. Install the BNC cover and front-panel knobs.

6--12

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Compact

flash board

Maintenance

Front case

screws (4)

Bush button

Knobs

Plastic BNC shell

0.625” BNC nut

BNC cover

Figure 6--4: Removing the front case

Front case

TPS2000 Series Digital Storage Oscilloscopes Service Manual

6--13

Maintenance

Acquisition Board

You will need a torque-limiting Torx T-15 long-shank screwdriver, a flat-blade
screwdriver, and a 16 mm (5/8 inch) deep socket for this procedure.

CAUTION. The acquisition board is particularly sensitive to ESD. Read the

Preventing ESD section on page 6--1 before removing or installing the
acquisition board.

Removal. To remove the acquisition board , refer to Figure 6--5 on page 6--15 and
follow these steps:

1. Remove the rear case. Follow the procedure on page 6--7.

2. Remove the BNC cover by prying up on the exposed edge. See Figure 6--5

on page 6--15.

3. Use the 16 mm (5/8 inch) deep socket to remove the nuts from the BNC
connectors.

4. Remove the plastic BNC shells from the BNC connectors. Grasp the BNC
shell with your fingers and pull up to remove the shell. See figure 6--5.

5. Remove the IO board. Follow the procedure on page 6--10.

6. Disconnect the display data cable at J201.

7. Remove the six screws that secure the acquisition board to the chassis.

8. Use the flat-blade screwdriver to pull up on the edge of the board and unseat

the connection between the acquisition board and the compact flash board.
See Figure 6--5.

9. Lift up the acquisition board to unseat the connection between the acquisition
board and compact flash board; then remove the acquisition board.

Installation. To install the acquisition board, refer to Figure 6--5 and follow these
steps:

1. Position the acquisition board over the chassis mounting tabs and align the
feedthrough connector on the front-panel and compact flash boards.

2. Push down to seat the connector.

3. Install the six screws that attach the acquisition board to the chassis.

4. Connect the display data cable at J201.

5. Install the IO board.

6--14

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Maintenance

6. Install the front case screws on the inside of the chassis.

7. Install the plastic BNC shells onto the BNC connectors.

8. Use the 16 mm (5/8 inch) deep socket and install the BNC nuts onto the

BNC connectors. Torque the nuts to 40 in-lbs using the torque wrench.

9. Install the BNC cover onto the front case.

10. Install the rear case.

11. Install the front-panel knobs.

Acquisition board
screws (6)

J201

Plastic BNC shell

BNC cover

Figure 6--5: Using a screwdriver to remove the Acquisition board

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Pull up gently

to disconnect

(J2100)

0.625” BNC nut

6--15

Maintenance

Front-Panel Board

You will need a torque-limiting Torx T-15 screwdriver for this procedure.

Removal. To remove the front-panel board, refer to Figure 6--6 on page 6--16 and
follow these steps:

1. Remove the front case. Follow the procedure on page 6--11.

2. Remove the five screws that attach the front-panel board to the chassis.

3. Pull out to remove the front-panel board from the chassis. (This will unseat

the feed-through connection between the front-panel board and the acquisi­tion board on the opposite side.

Chassis

Front panel circuit

board screws (5)

6--16

Front panel
circuit board

Figure 6--6: Removing the front-panel module

Installation. To install the front-panel module, refer to Figure 6--6 and follow

these steps:

1. Align the front-panel board over the front chassis and reseat the feed-through
connection between the front-panel board and the acquisition board on the
opposite side.

2. Install the five screws to attach the front-panel board to the chassis.

3. Install the front case.

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Maintenance

Display Module

You will need a torque-limiting Torx T-15 screwdriver and pliers for this
procedure.

Removal. To remove the display module, refer to Figure 6--7 on page 6--17 and
follow these steps:

1. Remove the front case. Follow the procedure on page 6--11.

2. Remove the front panel board. Follow the procedure on page 6--16.

3. Disconnect the display inverter cable from the backlight inverter board. See

Figure 6--2 on page 6--10 for the location of the board.

4. Remove the four screws that attach the display module to the external
chassis. Support the display with your hand.

5. Position the display so you can disconnect the display data cable. See
Figure 6--7.

CAUTION. The display shield is attached to the display module. Removing the
shield will destroy the attaching gasket.

Display inverter

cable

Chassis

LCD inverter

module

Display data

cable

Figure 6--7: Removing the display module

Installation. To install the display module, refer to Figure 6--7 and follow these

steps:

1. Connect the display data cable to the display.

TPS2000 Series Digital Storage Oscilloscopes Service Manual

6--17

Maintenance

2. Align the display module with the mounting tabs on the front of the chassis.

3. Install the four screws that attach the display module to the chassis.

4. Connect the display inverter cable to the backlight Inverter board.

5. Install the front-panel board.

6. Install the front case.

Compact Flash Board

You will need a torque-limiting Torx T-15 screwdriver for this procedure.

Removal. To remove the compact flash board, perform the follow these steps.
Refer to Figure 6--4 on page 6--13 for the board location.

1. Remove the acquisition board. Follow the procedure

2. Remove the two screws below the IO board mounting bracket that attach the

compact flash board to the internal chassis. See Figure 6--2 on page 6--10 for
the IO board location.

3. Remove the single screw below the display module that attaches the compact
flash board to the external chassis.

4. Remove the compact flash board.

Installation. To install a new compact flash board, follow these steps:

1. Align the compact flash board with the mounting bracket on the front of the
chassis and the mounting posts on the inside of the chassis.

2. Install the screws the attach the compact board to the chassis.

3. Reinstall the acquisition board.

on page 6--14.

6--18

Keypad

You will need a torque-limiting Torx T-15 screwdriver and 16 mm (5/8 inch)
deep socket for this procedure.

Removal. To remove the switch keypad, refer to Figure 6--8 on page 6--19 and
follow these steps:

1. Follow the procedure on page 6--11 to remove the front case.

2. Lift the keypad out of the front case.

CAUTION. Keep the electrical contacts on the back of the keypad clean. Skin oils
and dust will inhibit good electrical contact.

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Use care to avoid touching

the electrical contacts

Maintenance

Keypad

Front case

Figure 6--8: Removing and installing the keypad

Installation. To install the switch keypad, refer to Figure 6--8 and follow these

steps:

1. Place the front case face down on a soft surface.

2. Align the switch keypad into the front case using the guide posts and the

holes in the keypad.

CAUTION. Keep the electrical contacts on the back of the switch pad clean. Skin
oils and dust will inhibit good electrical contact.

3. Ensure that all buttons are properly seated into place before proceeding.

4. Place the entire internal assembly into the front case.

TPS2000 Series Digital Storage Oscilloscopes Service Manual

6--19

Maintenance

Troubleshooting

This section contains information and procedures to help you isolate a defective
module in the oscilloscope.

WARNING. Before perform this or any other procedure in this manual, read the

General Safety Summary and Service Safety Summary found at the beginning of
this manual. Also, to prevent possible injury or damage to electrical components,
read Preventing ESD on page 6--1.

Adjustment After Repair

Required Tools and

Equipment

Troubleshooting Tree

If you replace the acquisition circuit board, you must adjust the oscilloscope after
repair. Refer to the Adjustment Procedures section on page 5--1.

You may need the the following tools and equipment to troubleshoot the
oscilloscope:

Tools and equipment Example

Oscilloscope with 1X/10X and 100X probes Tektronix TDS1000- or TDS2000-series

oscilloscope with standard accessory 1X/10X
probe (P2200) and optional 100X probe
(P5100 or P5200)

DMM 3.5 or greater digit DMM

To isolate a problem to a specific troubleshooting procedure, use the trouble­shooting tree in Figures 6--9 through 6--12.

6--20

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Maintenance

Put scope or

frequency counter

on probe comp

1 kHz?

Yes

Verify LCD

connector and

cable values

No

Replace

Acquisition

board

Turn on power

No

Run probe check

on each channel

Does screen

lighten?

Yes

See

boot up

screen?

Yes

Errors?

No

Front panel

problems?

No

No

Yes

Yes

From Figure 6--11

A

To Figure 6--11

B

C

To Figure 6--10

D

To Figure 6--10

No

Yes

Replace display
or display cable

Probe

check ok?

Yes

Connect
external trigger
to probe comp

Set trigger

source to EXT

Press set 50%

No

Good

voltages?

Replace

Acquisition board

Figure 6--9: Oscilloscope troubleshooting tree (1 of 4)

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Replace

Acquisition

board

Trigger

indicator ON?

Yes

Good scope

No

Replace

Acquisition

board

6--21

Maintenance

C

From Figure
6--9

D

From Figure 6--9

Able to run

front panel

tests?

Yes

Run front panel
tests in service

menu

<5key

problem

Yes

No

No

Replace Front

Panel or

Acquisition board

E

From Figure 6--11

Replace

Acquisition

board

Acquisition

problem?

No

Verify IO board

voltages

IO board

voltages OK?

Yes

Replace

Acquisition

board

Replace IO

board

Yes

No

No

F

To Figure 6--12

Disconnect IO

board

Verify power

supply Voltages

Power

supplies OK?

Replace Front

Panel board

Figure 6--10: Oscilloscope troubleshooting tree (2 of 4)

6--22

TPS2000 Series Digital Storage Oscilloscopes Service Manual

Yes

Replace

Acquisition

board

Maintenance

To Figure 6--9

From Figure 6--9

A

B

Power cord

attached?

Yes

Open case

Verify IO board

voltages

Yes

Backlight cable

attached?

Using a high

voltage 100X

probe test voltages

on backlight

connectors

No

No

No

Yes

Attach power

cord

Reinstall case

From Figure

6--10

E

Attach backlight

cable

~50 kHz

>700 V

pk--pk

No

Detach display

Yes

?

Figure 6--11: Oscilloscope troubleshooting tree (3 of 4)

Replace display

Yes

~50 kHz

>700 V

pk--pk

?

No

Replace LCD

Backlight board

TPS2000 Series Digital Storage Oscilloscopes Service Manual

6--23

Maintenance

From Figure 6--10

F

Memory function

problem?

Yes

Verify memory

function with CF

card

Memory function

OK?

Replace

Compact Flash

board

No

Yes

No

Communication

problem?

Yes

Replace

Acquisition

board

Instrument no

problem

No

Battery charging

problem

Exchange IO

board

Memory function

OK?

No

Replace

Acquisition

board

Yes

Figure 6--12: Oscilloscope troubleshooting tree (4 of 4)

Problem fixed

6--24

TPS2000 Series Digital Storage Oscilloscopes Service Manual