Tektronix TDS1001C EDU, TDS1002C EDU, TDS1012C EDU, TDS2001C, TDS2002C Service Manual

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TDS2000C and TDS1000C-EDU Series

ZZZ

Digital Storage Oscilloscopes

Service Manual

Revision A

This document applies to TDS2000C and TDS1000C-EDU models with serial numbers of C030000 and above. This document a pplies to ﬁrmw are version 1.00 and above.

Warning

The servicing instructions are for use by qualiﬁed personnel only. To avoid personal injury, do not perform any servicing unless you are qualiﬁed to do so. Refer to all safety summaries prior to performing service.

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077-0446-02

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Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supersedes that in all previously published material. Speciﬁcations and price change privileges reserved.

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For product information, sales, service, and technical support:

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Table of Contents

General safety summary ........................ .................................. ................................ vi

Service safety summary.......................................................................................... viii

Preface .............................................................................................................. ix

Manual Conventions................................ ................................ .......................... ix

Related Documentation ...................................................................................... ix

Speciﬁcations ........ .................................. ................................ ............................. 1

Signal Acquisition System Characteristics.. . .. .. . . . . . . . . . . . . . . . . . . . . . . .... .. .. .. . . . . . . . . . . . . .... .. .. .. . . . . . 1

Time Base System .. ................................ .................................. ......................... 7

Triggering System ...... .................................. ................................ ..................... 9

Display Speciﬁcations............................ .................................. .......................... 13

Interfaces and Output Ports Speciﬁcations................................................................. 14

Data Handling Characteristics............................... ................................ ................ 14

Power Distribution System .................................................................................. 14

Mechanical Characteristics .................................................................................. 15

Environmental Performance................................................................................. 15

Data Logging System Characteristics (Not Available on TDS1000C-EDU Models) ................. 15

Limit Testing System Characteristics (Not Available on TDS1000C-EDU Models) ... . . . .. . . .. . . . . . 16

Where to Find Operating Information........... .................................. .............................. 19

Theory of Operation................... .................................. ................................ .......... 21

System Level Block Diagrams ........................ .................................. .................... 22

Main Board .................................................................................................... 24

Acquisition System .. . .. .. .. . . . . . . . . .. . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . .. . . . 2 4

Processing and Display System .......... ................................ .............................. 25

Input Signal Interface................................ ................................ .................... 25

Probe Compensation......... ................................ .................................. .......... 25

External Trigger.......................................................................................... 25

Main Board Power....................................................................................... 25

Power Supply.................................................................................................. 25

Display Module ... .................................. .................................. ........................ 26

Front Panel .................. .................................. ................................ ................ 26

Two-Channel Oscilloscopes . .. .. . . .... .. .. .. . . . . . . .... .. .. .. . . . . .... .. .. .. . . . . .... .. .. .. . . . . .... .. .. .. . 26

Four-Channel Oscilloscopes .. .. .. . .. .. .. .. .. .. .. .. .. .. . .. .. .. .. .. .. .. .. .. .. .. .. .. . .. .. .. .. .. .. .. .. .. . .. 26

Performance Veriﬁcation ....... ................................ .................................. ................ 27

Required Equipment............................ ................................ .............................. 27

Test Record.... .................................. ................................ .............................. 28

Performance Veriﬁcation Procedures....... .................................. .............................. 29

Self Test................................................................................................... 29

Self Calibration........... .................................. .................................. ............ 29

Check DC Gain Accuracy............................................................................... 29

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual i

Table of Contents

Check Bandwidt

Check Sample Rate Accuracy and Delay Time Accuracy......................... .................. 32

Check Edge Trigger Sensitivity ........ ................................ ................................ 33

Check External Edge Trigger Sensitivity.......................... .................................. .. 35

Check Vertical Position Accuracy... .. .. .. .. .. . . .. . . . . .. . . . . . . .. . . . . .. . . . . .. . . . . .. . . . . .. . . . . .. . . . . . . .. . 36

Adjustment Procedures ........................................................................................... 41

Required Equipment.......................................................................................... 41

Adjustment Procedure........................................................................................ 41

Enable the Service Menu........................ .................................. ...................... 42

Adjustment Procedure ................... ................................ ................................ 44

Maintenance........................................................................................................ 49

Preventing ESD ............................................................................................... 49

Inspection and Cleaning................ ................................ .................................. .... 49

General Care.............................................................................................. 50

Interior Cleaning ......................................................................................... 50

Exterior Cleaning .......... .................................. ................................ ............ 50

Exterior Inspection......................................... .................................. ............ 51

Interior Inspection ..... ................................ .................................. ................ 51

Cleaning Procedure, Interior........................................ ................................ .... 52

Removal and Installation Procedures................. ................................ ...................... 54

Summary of Procedures............... .................................. ................................ 54

Required Tools ........................... .................................. .............................. 56

Rear Feet............ .................................. ................................ .................... 56

Flip Feet................................................................................................... 57

Front-Panel Knobs ....................................................................................... 57

Power Button ......................... ................................ .................................. .. 57

Rear Case ................................................................................................. 58

Front Feet ............................... .................................. ................................ 59

Power Supply Module............. ................................ .................................. .... 60

Internal Assembly.. .................................. .................................. .................. 61

Front-Panel Cable...................................... ................................ .................. 62

Main Board Module (Serial number C030000 or later) ............................................. 63

Display Module .......................................................................................... 66

Front-Panel Module...................................................................................... 67

Keypad .............. .................................. ................................ .................... 68

Troubleshooting......................... .................................. ................................ .... 69

Adjustment After Repair ................................................................................ 69

Required Tools and Equipment................. ................................ ........................ 69

Troubleshooting Tree.................................................................................... 69

Probe Comp Output...................................................................................... 74

Troubleshooting the Power Supply .................................................................... 75

h ........................................................................................ 31

ii TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Table of Contents

Troubleshooti

Troubleshooting the Front Panel ....... ................................ ................................ 77

Troubleshooting the Main Board. ................................ .................................. .... 80

Repackaging Instructions ................ ................................ .................................. .. 83

Diagrams ........................................................................................................... 85

Replaceable Parts .................................................................................................. 87

Parts Order

Using the Replaceable Parts List............................................................................ 88

Parts Lists and Exploded Views............................................................................. 89

Appendix A: Example of a Vertical Position Accuracy Test Spreadsheet.. . .. . . . . . . . . . . . . . . . . . . .... .. .. .. . . 99

Sample Filled-In Vertical Position Accuracy Test Spreadsheet . .... .. .. .. . . . . .... .. .. .. . . . . .... .. .. .. . . . 99

ng the Display.................... .................................. ...................... 76

ing Information .................................................................................. 87

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual iii

Table of Contents

List of Figure

Figure 1: Module-level block diagram (2-channel)............................................................ 22

Figure 2: Mo

Figure 3: Example of a line graph for the Vertical Position Accuracy test . . . . . .. . . . . . . .. . . . . . . .. . . . . . . .. . . . 39

Figure 4: Adjustment setups ..................................................................................... 43

Figure 5: Locator for trim and cabinet removal (4-channel model shown) ................................. 55

Figure 6: Locator for internal modules (4-channel model shown)............................... ............ 55

Figure 7: Instrument cable locations (Main Board SN C030000 or later) .................................. 64

Figure 8:

Figure 9: Oscilloscope troubleshooting tree (page 2 of 4) . . . . . . . . . . .. . . . . . . . . .. . . . . . . . . .. . . . . . . . . . . .. . . . . . . . . 71

Figure 10: Oscilloscope troubleshooting tree (page 3 of 4)... . . . . . . . .... .. .. .. . . .... .. .. .. .... .. .. .. . . .... .. . 72

Figure 11: TDS2000C and TDS1000C-EDU series block diagram ......................................... 86

Figure 12: Exploded diagram, 2-channel models.............................................................. 89

Figure 13: Exploded diagram, 4-channel models.............................................................. 92

e 14: Power supply module, cables, and wires........................................................... 94

Figur

Figure 15: Exploded diagram, back case and trim............................................................. 96

dule-level block diagram (4-channel)............................................................ 23

Oscilloscope troubleshooting tree (page 1 of 4) .. .. .. . . .. . . . . . . . . .. . . . . . . . . .. . . . . . . . . .. . . . . . . . . . . .. 70

iv TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

List of Tables

Table 1: Signal acquisition system characteristics. .. .. .. .. .. . . . . .... .. .. .. . . . . .... .. .. .. . . . . . . .... .. .. .. . . . . ... 1

Table 2: Tim

Table 3: Triggering system ....................... ................................ ................................. 9

Table 4: Display spec iﬁcations................................................................................... 13

Table 5: Interfaces and output ports speciﬁcations .. .................................. ........................ 14

Table 6: Data handling characteristics .......................................................................... 14

Table 7: Power distribution system.............................................................................. 14

Table 8: M

Table 9: Environmental performance ........................................................................... 15

Table 10: Data logging system characteristics (not available on TDS1000C-EDU models).............. 16

Table 11: Limit testing system characteristics (not available on TDS1000C-EDU models).. .. .. .. .. .. .. 16

Table 12: Performance veriﬁcation.............................................................................. 27

Table 13: Test record.......... .................................. .................................. ................ 28

14: Required equipment ................................................................................... 41

Table

Table 15: Adjustment steps..................................... .................................. ................ 45

Table 16: External inspection checklist......................................................................... 51

Table 17: Internal inspection checklist.......................................................................... 52

Table 18: Tools and equipment .................................................................................. 69

Table 19: Probe Comp output.................. ................................ .................................. 74

ble 20: Troubleshooting the power supply................................................................... 75

Table 21: Troubleshooting the front panel – service........................... ................................ 77

Table 22: Troubleshooting the front panel – Service Diag.................................................... 77

Table 23: Troubleshooting the front panel – Mfg. test ...... .................................. ................ 77

Table 24: Expected signals at J202............ .................................. ................................ 78

Table 25: Troubleshooting the Main board ............... .................................. .................... 80

Table 26: List of error codes ..................................................................................... 81

Table 27: Replaceable parts list.................................................................................. 88

Table 28: Replaceable parts list, 2-channel models............................................................ 90

Table 29: Replaceable parts list, 4-channel models............................................................ 93

Table 30: Replaceable parts list; power supply module, instrument cables, and wires .................... 94

Table 31: Replaceable parts list, back case and trim .......................................................... 97

Table 32: Vertical position accuracy test spreadsheet . .. .. .... .. .. .. .... .. .. . . . . . . .... .. .. .. .... .. .. .. .... .. .. 99

e base system ................. .................................. .................................. ... 7

echanical characteristics ........... .................................. ................................ 15

Table of Contents

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual v

General safety summary

General safet

To avoid ﬁr

e or personal

injury

ysummary

Review the fo this product or any products connected to it.

To avoid pot

Only qualiﬁed personnel should perform service procedures.

Use proper

certiﬁed for the country of use.

Connect a

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

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

nals of the product, ensure that the product is properly grounded.

termi

Observe all terminal ratings. To av o id ﬁre or shock hazard, observe all ratings

arkings on the product. Consult the product manual for further ratings

and m information before making connections to the product.

llowing safety precautions to avoid injury a nd prevent damage to

ential hazards, use this product only as s peci ﬁed.

power cord. Use only the power cord speciﬁed for this product and

nd disconnect properly. Connect the probe output to the measurement

nect the probe reference lead to earth ground only.

Con

Do not apply a potential to any terminal, including the common terminal, that

eeds the maximum ratingofthatterminal.

exc

Power disconnect. The power switch disconnects the product from the power

urce. See instructions for the location. Do not block the pow er switch; it must

so remain accessible to the user at all times.

o not operate without covers. Do not operate this product with covers or panels

removed.

Do not operate with suspected failures. If you suspect that there is damage to this product, have it inspected by qualiﬁed service personnel.

Avoid exposed circuitry. Do not touch exposed connections and components when power is present.

vi TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

General safety summary

Terms in this manual

Symbols and terms on the

product

Do not operate i

Do not operate in an explosive atmosphere.

Keep product surfaces clean and dry.

Provide prop

on installing the product so it has proper ventilation.

These terms may appear in this manual:

WAR N ING.

in injury or loss of life.

CAUTION

damage to this product or other property.

These t

erms may appear on the product:

DANGER indicates an injury hazard immediately accessible as you read the m a

n wet/damp conditions.

er ventilation. Refer to the manual's installation instructions for details

Warning statements identify conditions or practices that could result

. Caution statements identify conditions or practices that could result in

rking.

WARNING indicates an injury hazard not immediately accessible as you

the marking.

read

CAUTION indicates a hazard to property including the product.

The following symbol(s) m ay appear on the product:

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual vii

Service s afety summary

Service safet

ysummary

Only qualiﬁe 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 ﬁ rst aid and resuscitation is present.

Disconnect power. To avoid electric shock, switch off the instrument power, then disconnect the power cord from the mains power.

Use care when servicing with power on. Dangerous voltages or currents may exist in this p test leads before removing protective panels, soldering, or replacing components.

To avoi

d personnel should perform service procedures. Read this Service

roduct. Disconnect power, remove battery (if applicable), and disconnect

d electric shock, do not touch exposed connections.

viii TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Preface

Manual Conventions

This service manual provides information to verify performance of, calibrate, troubleshoot, disassemble, and replace parts on the TDS2000C and TDS1000C-ED

Unless noted otherwise, the term "oscilloscope" refers to all models in the TDS2000C an

U Series Digital Storage Oscilloscopes.

d TDS1000C-EDU series.

Modules

Replaceable Parts

Safety

Related Documentation

This manu before attempting service.

Throughout this manual, any replaceable component, assembly, o r part is referred to by the

A module is composed of electrical and mechanical assemblies, circuit cards, interc

This manual refers to any ﬁeld-replaceable assembly or mechanical part speciﬁcally by its name or generically as a replaceable part. In general, a

aceable part is any circuit board or assembly, such as th e hard disk drive, or a

repl mechanical part, such as the I/O port connectors, that is listed in the replaceable parts list.

Sym at the beginning of this manual.

al uses certain conventions that you should become familiar with

term module.

onnecting cables, and user-accessible controls.

bolsandtermsrelatedtosafetyappearintheServiceSafetySummaryfound

To read about Use these documents

nstallation and

I Operation

Programmer Commands

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual ix

he oscilloscope user manual, available on the Tektronix Web

T site.Go to www.tektronix.com/manuals and search for the user

manual for your product (available in 11 languages).

The oscilloscope programmer manual, available on the Tektronix Web site. Go to www.tektronix.com/manuals and search for the

programmer manual for your product.

Preface

x TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Speciﬁcations

These speciﬁcations apply to all TDS2000C and TDS1000C-EDU series oscilloscopes. To verify that an oscilloscope meets speciﬁcations, it must ﬁrst meet the foll

owing conditions:

The oscilloscope must have been operating continuously for twenty minutes within the s

peciﬁed operating temperature.

You must perform the Do Self Cal operation, accessible through the Utility menu, if th

e operating temperature has changed by more than 5 ° C (9 °F)

since the last time the Do Self Cal operation was performed.

Speciﬁca

tions are provided in the following tables. All speciﬁcations are guaranteed unless noted "typical." Speciﬁcations that are m arked with the symbol are checked in the Performance Veriﬁcation section. (See page 27, Performance Ver iﬁcation.)

Signal Acquisition System Characteristics

NOTE.

attenuation factors unless otherwise speciﬁed. This is due to the way the displayed sensitivity works. This does not affect actual methods of attachment. It only alters the relationship between displayed scale factors and the speciﬁcations.

Table 1: Signal acquisition system characteristics

Characteristic

Number of Input

annels

Input Coupling DC, AC, or GND Input Impedance, DC

Coupled

Description

TDS1001C-EDU

S1002C-EDU

TD TDS1012C-EDU TDS2001C

S2002C

TD TDS2012C TDS2022C

TDS2004C

DS2014C

T TDS2024C

1MΩ ±2%inparallelwith20pF±3pF

All amplitude-related or modiﬁed speciﬁcations require 1X probe

Two nominally identical channels, sampled simultaneously.

Four nominally identical channels, sampled simultaneously.

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 1

Speciﬁcations

Table 1: Signal acquisition system characteristics (cont.)

Characteristic

Maximum Input Voltage

Description

At the front panel connector, 300 V

, Installation Category II; derate at 20 dB/decade above 100 kHz to

RMS

13 V peak AC at 3 MHz and above. Based on sinusoidal or DC input signal. The maximum viewable signal while DC coupled is ±50 V offset

±5 V/div at 4 divisions, or 70 V. AC coupling allows measuring signals on a DC level up to 300 V. For nonsinusoidal waveforms, peak value must be less than 450 V. Excursions above 300 V should be less than 100 ms in duration, and the duty factor is limited to < 44%. The RMS signal level must be limited to 300 V. If these values are exceeded, damage to the instrument may result.

8 bits except at 2 mV/divNumber of Digitized Bits Displayed vertically with 25 digitization levels per division, 10 divisions dynamic range. 2 mV/div setting is generated by digital m ultiplication and the resolution is reduced. Given 100 levels

available, the resolution is >6.5 bits. Sensitivity Range 2 mV/div to 5 V/div in 1-2-5 sequence with the probe attenuation set to 1X. Display Gain Variable

The Display Gain Variable function allows the user to vary the vertical display gain continuously over the

full range.

Resolution is that of the coarse gain from which these data are constructed. Fine gain values (for

instance 120 mV/div) are acquired at the next higher coarse gain setting (in this case 200 mV/div).

The Display Gain Variable is achieved by digital mult iplication of the data to obtain the settings between

the 1-2-5 gain settings.

Hard copy outputs to printer will be exactly the same as seen on screen even when the Display Gain

Variable is used.

However, WAVEFORM DATA obtained through the I/O interface is limited to the 1-2-5 gain settings. Probe Scale Factors

1X, 10X, 20X, 50X, 100X, 200X, 500X, 1000X voltage attenuation.

5, 1, 500 m, 200 m, 20 m, 10 m, 1 m V/A current scale factor.

This adjusts the d isplay scale factor of the instrument to accommodate various probe types.

Accuracy of the probe used must be added to the accuracy speciﬁcations of instrument.

No automatic probe interface is provided, so you must verify that the settings match the probe

characteristics. The probe check function allows setting of the proper attenuation for voltage probes. Acquisition Modes

Sample, Peak Detect, Average

Envelope mode not provided Retained Front Panel

Settings

Front panel settings are retained when the instrument power is turned off and on with the power switch.

The settings are retained when the line power is turned off and on.

The instrument periodically saves front panel settings after settings are changed. There is a delay of

three seconds after the last change and before the storage of the settings in memory.

2 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Table 1: S ignal acquisition system characteristics (cont.)

Speciﬁcations

Characteristic

Math Modes

Voltage Measurement Functions

√ DC Gain Accuracy, Sample or Average Acquisition

DC Voltage Measurement Accuracy, Average Acquisition Mode

Delta Volts Measurement Accuracy, Average Acquisition Mode

Analog Bandwidth

Description

All Units: Channel 1 - Channel 2 Channel 2 - Channel 1 Channel 1 + Channel 2 Channel 1 * Channel 2 FFT

4 channel units (TDS20X4C): Channel 3 - Channel 4 Channel 4 - Channel 3 Channel 3 + Channel 4 Channel 3 * Channel 4

Mean, Cyc RMS, Peak-to-Peak, Max, Min, RMS, CursorRMS

This is the difference between the measured DC gai n and the nominal DC gain, divided by the nominal DC gain and expressed as a percent.

±3%, 5 V/div through 10 mV/div ±4%, 5 mV/div and 2 mV/div

Vertical position = 0: ±(3% of |reading| + 0.1 div + 1 mV) Vertical position ≠ 0 and vertical scale = 2 mV/div to 200 mV/div: ±[3% of |reading + vertical position|

+ 1% of |vertical position| + 0. 2 div + 7 mV] Vertical position ≠ 0 and vertical scale > 200 mV/div: ±[3% of |reading + vertical position| + 1% of

|vertical position| + 0.2 div + 175 mV]

Delta volts between any two averages of 16 waveforms acquired under the same setup and ambient conditions.

(3% of |reading| + 0.05 div)

Deﬁned in Section 4.6 of IEEE std 1057. The difference between the upper and lower frequencies, at which the amplitude response, as seen in the data record, is 0.707 (-3 dB) of the response seen in the data record at the speciﬁed reference frequency. Speciﬁes only the -3 dB point. It does not include the in-band response.

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 3

Speciﬁcations

Table 1: Signal acquisition system characteristics (cont.)

Characteristic

√ Analog Bandwidth, DC Coupled, Sample or Average

Analog Bandwidth, DC Coupled, Peak Detect, typical

Analog Bandwidth Selections

Description

This is analog bandwidth when the instrument is DC coupled in sample or average mode. V/div values

are accurate for probe attenuation settings of 1X. No probe should be installed for these measurements.

System bandwidth is type tested to be equivalent to this speciﬁcation with the provided probe in 10X

mode. Use Section 4.6.1 of IEEE 1057, with the reference frequency of 1 kHz at an amplitude of

5 divisions, driven from a 50 Ω source with external termination at the input BNC (25 Ω effective source).

TDS2022C, TDS2024C:

to ≥ 200 MHz for 5 mV/div through 5 V/div settings with bandwidth limit at full with temperature between

0°C and 35 °C. DC to > 160 MHz for 5 mV/div through 5 V/div settings with bandwidth limit at full for

temperatures between 0 °C and 50 °C. < 5 mV/div settings are limited to 20 MHz bandwidth.

TDS2012C, TDS2014C:

DC to ≥ 100 MHz for 5 mV/div through 5 V/div settings with bandwidth limit at full. < 5 mV/div settings

are limited to 20 MHz bandwidth.

TDS2002C, TDS2004C:

DC to ≥ 70 MHz for 5 mV/div through 5 V/div settings with the bandwidth limit at full. < 5 MV/div settings

are limited to 20 MHz bandwidth.

TDS2001C:

DC to ≥ 50 MHz for 5 mV/div through 5 V/div settings with the bandwidth limit at full. < 5 mV/div settings

are limited to 20 MHz bandwidth.

TDS1012C-EDU:

DC to ≥ 100 MHz for 5 mV/div through 5 V/div settings with bandwidth limit at full. < 5 mV/div settings

are limited to 20 MHz bandwidth.

TDS1002C-EDU:

DC to ≥ 60 MHz for 5 mV/div through 5 V/div settings with the bandwidth limit at full. < 5 MV/div settings

are limited to 20 MHz bandwidth.

TDS1001C-EDU:

DC to ≥ 40 MHz for 5 mV/div through 5 V/div settings with the bandwidth limit at full. < 5 mV/div settings

are limited to 20 MHz bandwidth.

This is the analog bandwidth when the instrument is DC coupled. V/div values are accurate for probe

attenuation settings of 1X. No probe should be installed for these measurements.

TDS1012C-EDU, TDS2012C, TDS2014C, TDS2022C, TDS2024C:

DC to ≥ 75 MHz for 5 mV/div through 5 V/div settings with the bandwidth limit at full. Settings less

than 5 mV /div are limited to 20 MHz bandwidth.

TDS1002C-EDU, TDS2002C, TDS2004C:

DC to ≥ 50 MHz for 5 mV/div through 5 V/div settings with the bandwidth limit at full. Settings less

than 5 mV /div are limited to 20 MHz bandwidth.

TDS1001C-EDU, TDS2001C:

DC to ≥ 30 MHz for 5 mV/div through 5 V/div settings with the bandwidth limit at full. Settings less

than 5 mV /div are limited to 20 MHz bandwidth.

20 MHz bandwidth limit ON/OFF

4 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Table 1: S ignal acquisition system characteristics (cont.)

Speciﬁcations

Characteristic

Upper-Frequency Limit, 20 MHz Bandwidth Limited, typical

Lower- Frequency Limit, AC Coupled

Rise Time, typical

Peak Detect Mode Pulse Response

Vertical Position Ranges

Description

This is the upper frequency for Analog Bandwidth when the instrument has 20 MHz bandwidth limiting turned on.

20 MHz Bandwidth of all trigger paths are similarly limited, except the External Trigger, which is not affected

by BW Limit function. Each channel is separately limited, allowing different bandwidths on different channels of the same instrument.

This is the lower frequency for Analog Bandwidth when the instrument is AC-coupled

≤ 10 Hz. <1 Hz when 10X, passive probes are used.

Model

TDS2022C, TDS2024C TDS2012C, TDS2014C TDS2002C, TDS2004C TDS2001C TDS1012C-EDU TDS1002C-EDU TDS1001C-EDU Rise time is generally calculated from the followi ng formula: Rise time in ns = 350 / Bandwidth in MHz

This is the capability of the instrument to capture single event pulses using the Peak Detect Acquisition Mode.

The minimum single pulse widths for guaranteed 50% or greater amplitude capture are as follows:

Model

TDS1002C-EDU TDS1012C-EDU TDS2002C TDS2004C TDS2012C TDS2014C TDS2022C TDS2024C

TDS1001C-EDU TDS2001C

These are the ranges of the user-settable input offset voltage.

Volts/Div Setting

2 mV/div to 200 mV/div > 200 mV/div to 5 V/div

Expected full bandwidth rise time

2.1 ns

3.5 ns

5.0 ns

7.0 ns

3.5 ns

5.8 ns

8.8 ns

Sec/Div Setting

50 sec/div to 5 μS/div

Position Range

±1.8V ±45V

Minimum Pulse Width

12 ns

13 ns

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 5

Speciﬁcations

Table 1: Signal acquisition system characteristics (cont.)

√ Vertical Position Accuracy

Common Mode Rejection Ratio (CMRR), typical

Crosstalk (Channel Isolation)

This is the accuracy of the nominal voltage level represented by the code at the vendor of the A-D

converter's dynamic range.

Volts/Div Setting

2 mV/div to 200 mV/div ±(1% of |selected value| + 0.1 div + 5 mV) within the

> 200 mV/div to 5 V/div ±(1% of |selected value| + 0.1 div + 125 mV) within the

With the same signal applied to each channel, CMRR is the ratio of the acquired signal amplitude to the

amplitude of the M ATH difference waveform, either (Channel 1 - Channel 2), (Channel 2 - Channel 1),

(Channel 3 - Channel 4) or (Channel 4 - Channel 3)

Model

TDS1012C-EDU

TDS2012C

TDS2014C

TDS2022C

TDS2024C

TDS1001C-EDU

TDS1002C-EDU

TDS2001C

TDS2002C

TDS2004C

Section 4.11.1 of IEEE std. 1057. It is the r atio of the level of a signal input into one channel to that of

the same signal present in another channel due to stray coupling.

Model

TDS2022C

TDS2024C

TDS1012C-EDU

TDS2012C

TDS2014C

TDS1002C-EDU

TDS2002C

TDS2004C

TDS1001C-EDU

TDS2001C

Common Mode Rejection Ratio

100:1 at 60 Hz, reducing to 10:1 with 50 MHz sine wave, with equal Volts/Div and Coupling settings on each channel.

100:1 at 60 Hz, reducing to 20:1 with a sine wave with frequency equal to ½ the -3 dB bandwidth and with equal Volts//Div and Coupling settings on each channel.

Crosstalk

≥ 100:1 with a 100 MHz sine wave and with equal V/div settings on each channel

≥ 100:1 with a 50 MHz sine wave and with equal V/div settings on each channel

≥ 100:1 with a 30 MHz sine wave and with equal V/div settings on each channel

≥ 100:1 with a 20 MHz sine wave and with equal V/div settings on each channel

Position Accuracy

range ±1.8 V

range ±45 V

6 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Speciﬁcations

Time Base Syst

Table 2: Time base system

Characteris

Sample-Rate

Recor

√ Long-Term Sample Rate and Horizontal

sition Time Accuracy

Horizontal Position Time

nge

Horizontal Window Display

tic

Range

d Length

Description

This is the ra its inputs and stores the samples in memory to produce a record of time-sequential samples. (IEEE 1057, 2.2.1)

Model

TDS2012C TDS2014C TDS2022C TDS2024C

TDS1001C-EDU TDS1002C TDS1012C-EDU TDS2001C TDS2002 TDS2004C

(Sin x)/x interpolationWaveform Interpolation Waveform interpolation is activated for sweep speeds of 100 ns/div and faster.

This is the total number of samples contained in a single acquired waveform record (Memory Length in IEEE 1057.2.2.1).

2,500 samples per record. 5 n s/div to 50 s/div in 1–2.5–5 sequenceSeconds/Division Range Sec/Div Variable function is not available for this product.

s is the maximum, total, long-term error in sample-rate or horizontal position time accuracy, expressed

Thi in parts per million.

0 ppm over any ≥1 ms interval.

±5

Horizontal scale setting Horizontal position time range

5ns/divto10ns/div

5 ns/div to 100 μs/div

2 250 μs/divto10s/div 25 s/div to 50 s/div The user controls the time from the trigger to the center graticule on the display with the Horizontal

Position knob. The resolution of the Horizontal Position time is 1/25 of a horizontal division. The Window Zone enables a user to select a part of the display to be magniﬁed. The user controls the

location with the Horizontal Position knob and the width with the Sec/Div knob. Vertical cursors show the selected zone. To magnify the zone, the user selects the window from the menu.

nge of real-time rates, expressed in samples/second, at which a digitizer samples signals at

Sample-rate range

5 S/s to 2000 MS/s

5 S/s to 1000 MS/s

-EDU

-4 div * s/div to 20 ms 4 div * s/div to 50 ms

-4 div * s/div to 50 s

-4 div * s/div to 250 s

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 7

Speciﬁcations

Table2: Timebasesystem(cont.)

Characteristic

Delta Time Measurement Accuracy

Time Measurement Functions

Description

This is the accuracy of delta time measurements made on any single waveform.

The limits are given in the following table for signals having an amplitude ≥ 5 divisions, a slew rate at the measurement points of ≥ 2.0 divisions/ns, and acquired ≥ 10 mV/div.

Condition

Single shot, sample mode, full bandwidth selected

> 16 averages, full bandwidth selected

The Sample Interval is the time between the samples in the waveform record. Frequency, Period, Rise Time, Fall Time, Positive Width, negative Width, Positive Duty Cycle, Phase,

Delay

Time Measurement Accuracy

±(1 Sample Internal + 100 ppm * |reading| + 0.6 ns)

±(1 Sample Internal + 100 ppm * |reading| + 0.4 ns)

8 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Speciﬁcations

Triggering Sy

stem

Table 3: Triggering system

Characteris

Trigger Types Edge, Video, Pulse Width Trigger Source

Selection

Horizontal Trigger Posit

Trigg

External Trigger Input Impedance

External Trigger Maximum Input Voltage

ine Trigger

L Characteristics

Edge Trigger

tic

ion er Holdoff Range

Trigger Modes Auto, Normal

Description

Models Trigger source selections TDS1001C-EDU

TDS1002C-EDU TDS1012CTDS2001C TDS2002C TDS2012C TDS2022C

TDS2004C TDS2014C TDS2024C

External/5 selection attenuates the external signal by 5. When Bandwidth Limit is selected for a channel, the bandwidth of that channel’s trigger path will also be

d. The bandwidth of the External Trigger path is not affected by the bandwidth limit.

limite The trigger position is set by the Horizontal Position knob.

500 ns minimum to 10 s maximum The ability to set large values of Holdoff is limited by the difﬁculty in adjusting the Holdoff at Sec/Div

ings less than 100 ms/Div. This is because Holdoff c annot be set in Scan Mode, which begins at

sett 100 ms/div when Trigger Mode is AUTO. By adjusting Trigger Mode to NORMAL, the Scan Mode operation is turned off, and Holdoff can be adjusted at larger seconds/Div settings.

1M±2%inparallelwith20pF±3pF

300 V an

Ba ±5 V/div at 4 divisions, or 70 V. AC coupling allows measuring signals on a DC level up to 300 V. For nonsinusoidal waveforms, peak value must be less than 450 V. Excursions above 300 V s hould be less

han 100 ms duration and the duty factor is limited to < 44%. R MS signal level must be limited to 300 V. If

t these values are exceeded, damage to the instrument may result.

Line Trigger mode provides a source to synchronize the trigger with the AC line input. Input Amplitude requirements: 85 V Input Frequency requirements: 45 Hz - 440 Hz.

, Installation Category II; derate at 20 dB/decade above 100 kHz to 13 V peak AC at 3 MHz

RMS

d above sed on sinusoidal or DC input signal. The maximum viewable signal while DC coupled is ±50 V offset

EDU

Channel 1 Channel 2 External External/5 AC Line

Channel 1 Channel 2 Channel 3 Channel 4 External

l/5

Externa AC Line

- 265 VAC.

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 9

Speciﬁcations

Table 3: Triggering system (cont.)

Characteristic Description

AC, DC, Noise Reject, High Frequency Reject, Low Frequency RejectTrigger Coupling The External Trigger path does not have a DC blocking capacitor ahead of the trigger input circuit. The

rolloff associated with AC coupling happens after the input circuit. When attempting to trigger on an AC signal that has a DC offset, care must be used to avoid overloading the input of the External Trigger circuit. For signals that have a large DC offset, using Channel 1 or Channel 2 (and Channel 3 or Channel 4 for the TDS20X4B) with AC coupling is preferred.

Trigger Slope √ Sensitivity,

Edge-TypeTrigger, DC Coupled

Rising Edge, Falling Edge

Measurement Style A) The minimum signal levels for achieving stable frequency indication on the Trigger Frequency C ounter within 1% of correct indication.

Measurement Style B) Section 4 10.2 in IEEE Std. #1057. The minimum signal levels required for stable edge triggering of an acquisition when the trigger Source is DC coupled.

Trigger Source Sensitivity (Measurement

Channel Inputs

Ext

Ext/5

Trigger Frequency Readout typically stabilizes at 50% more signal than generates a stable visual display.

All products

TDS1001C-EDU

TDS1002C-EDU

TDS2001C

TDS2002C TDS2004C

TDS1012C-EDU TDS2012C TDS2014C

TDS2022C TDS2024C

All products

TDS2022C TDS2024C

All products TDS2022C

TDS2024C

Sensitivity (Measurement

style A ), typical

1.5 div from DC to 10 MHz ( > 2 mV/div)

4 div from DC to 10 MHz (2 mV/Div)

3 div between 10 MHz and 40 MHz

3 div between 10 MHz and 60 MHz

3 div between 10 MHz and 50 MHz

3 div between 10 MHz and 70 MHz

3 div between 10 MHz and 100 MHz

3 div between 10 MHz and 200 MHz

300 mV from DC to 100 MHz

500 mV from 100 MHz to 200 MHz

1.5 Vfrom DC to100 MHz 1 V from DC to 100 MHz

2.5 V from 100 MHz to 200 MHz

style B)

1 div from DC to 10 MHz > 2mV/div)

2.5 div from DC to 10 MHz (2 mV/Div)

1.5 div between 10 MHz and 40 MHz

1.5 div between 10 MHz and 60 MHz

1.5 div between 10 MHz and 50 MHz

1.5 div between 10 MHz and 70 MHz

1.5 div between 10 MHz and 100 MHz

1.5 div from 10 MHz to 100 MHz

2.0 div above 100 MHz to 200 MHz

200 mV from DC to 100 MHz

350 mV from 100 MHz to 200 MHz

1.75 V from 100 MHz to 200 MHz

10 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Table 3: Triggering system (cont.)

Characteristic Description

Sensitivity, Edge-Type Trigger, non-DC Coupled, typical

for Successful Operation of “Set Level to 50%” Function, typical

Trigger Level Ranges, typical

Trigger Level Accuracy, DC Coupled, typical

Video Trigger

Default Settings for Video Trigger

Video Trigger Source Selection

Video Trigger Polarity Selection

Video Sync Selection

Formats and Field Rates

Trigger Source Sensitivity

AC Same as DC Coupled limits for frequencies 50 Hz and

Noise Rej

HF Rej LF Ref Same as DC Coupled limits for frequencies above 300 kHz. Since AC coupling is not done in the front end, use of a 10M probe does not affect the low frequency

corner. 50 Hz.Lowest Frequency Using a 10M probe will not affect the operation of this function.

Input Channel ±8 divisions from center screen

Ext ±1.6 V Ext/5: The settable resolution for Trigger Level is 0.02 division for an input channel source, 4 mV for Ext source,

and 20 mV for Ext/5 source.

This is the amount of deviation allowed between the level on the waveform at which triggering occurs and the level selected for DC-coupled triggering signals

±(0.2 d iv + 5 mV) for signals within ±4 divisions from the center screen, having rise and fall times of ≥ 20 ns.

Ext: ±(6% of setting + 40 mV) for signals less than ±800 mV Ext/5: ±(6% of setting + 200 mV) for signals less than ±4 V

Trigger Mode: Auto Trigger Coupling: AC Same as Trigger Source Selections listed above except Line Trigger. Line Trigger source is meaningless

in this mode. Normal (Negative going Sync Signal), Invert (Positive going Sync Signal)

Line, Line #, Odd Field, Even F ield, Field: PAL/SECAM, NTSC formats

Field rates: 50 Hz to 60 Hz.Video Trigger Line rates: 15 kHz to 20 kHz (NTSC, PAL, SECAM)

Speciﬁcations

above Effective in Sample or Average Mode, > 10 mV/div to

5 V/div. Reduces DC Coupled trigger sensitivity by 2X. Same as DC Coupled limits from DC to 7 kHz.

±8 V

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 11

Speciﬁcations

Table 3: Triggering system (cont.)

Characteristic Description

Video Trigger Sensitivity, typical

Pulse-Width Trigger

Pulse-Width Trigger Modes

Pulse Width Trigger Edge

Pulse Width Range 33 ns ≤ width ≤ 10 seconds Pulse Width

Resolution Equal Guardband

Not Equal Guardband

Pulse-Width Trigger Point

Trigger Frequency Counter

This is the minimum peak–to–peak video signal required for stable Video-Type triggering.

Source

Input Channels 2 divisions of composite video Ext Ext/5 2 V of composite video

< (Less than), > (Greater than), = (Equal), ≠ (Not equal)

Falling edge for positive polarity pulse. Rising edge for negative polarity pulse.

16.5 ns or 1 part per thousand, whichever is larger

t > 330 ns: ±5% < guardband < ±(5.1% + 16.5 ns) t ≤ 330 ns: guardband = ±16.5 ns. All pulses, even from the most stable sources, have some amount of jitter. To avoid disqualifying pulses

that are intended to qualify but are not absolutely correct values, we provide an arbitrary guardband. Any measured pulse width within the guardband will qualify. If you are looking for pulse width differences that are smaller than the guardband width, offsetting the center should allow discriminating differences down to the guardband accuracy.

330 ns < 1: ±5% ≤ guardband < ±(5.1% + 16.5 ns) 165 ns < 1 < 330 ns: guardband = -16.5 ns/+33 ns t ≤ 165 ns: guardband = ±16.5 ns All pulses, even from the most stable sources, have some amount of jitter. To avoid disqualifying pulses

that are intended to qualify but are not absolutely correct values, we provide an arbitrary guardband. Any measured pulse width outside the guardband will qualify. If you are looking for pulse width differences that are smaller than the guardband width, offsetting the center should allow discriminating differences down to the guardband accuracy. Not equal has slightly better ability to deal with small pulse widths than equal. The accuracy is not better.

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 the time out trigger): The oscilloscope triggers when a pulse continues longer

than the time speciﬁed as the Pulse Width.

This provides a highly accurate means of identifying the frequency of trigger signals. Since averaging takes place over a longer time span, the number of stable digits is improved over the automatic measurement of the same type.

Typical sensitivity

400 mV of composite video

12 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Table 3: Triggering system (cont.)

Speciﬁcations

Frequency Counter Resolution

Frequency Counter Accuracy, typical

Frequency Counter Frequency Range, typical

Counter Signal Source

6 digits

±51 ppm including all reference errors and ±1 count errors.

AC coupled. 10 Hz minimum to rated bandwidth.

Pulse width or edge sele cted trigger source.Frequency Frequency counter measures selected trigger source at all times in pulse width and edge mode, including

when oscilloscope acquisition is halted due to changes in run status, or acquisition of a single shot event has completed.

Frequency counter does NOT measure pulses that do not qualify as legitimate trigger events. Pulse Width mode: Counts pulses of sufﬁcient magnitude inside the 250 ms measurement window

that qualify as triggerable events (for example, all narrow pulses in a PWM pulse train if set to < mode and the limit is set to a relatively small number).

Edge Trigger mode: Counts all pulses of sufﬁcient magnitude.

Display Speciﬁcations

Table 4: Display speciﬁcations

Characteristic Description

Display Type

Display Resolution

Brightness, typical

Contrast Ratio and Control, typical

11.5 cm (width) * 8.64 cm (height), 14.3 cm diagonal (5.7”), QVGA, active TFT color liquid crystal display (LCD) with color characters/waveforms on a black background. Surface antiglare (3H) treatment.

This is the number of individually addressable pixels

320 horizontal by 240 vertical pixels The video display contains both the character and waveform displays.

This is the light output of the backlight.

400 cd/m Available black room contrast ratio, full black to full white. 400 minimum, 500 typical.

, typical. 320 cd/m2min.

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 13

Speciﬁcations

Interfaces an

d Output Ports Speciﬁcations

Table 5: Interfaces and output ports speciﬁcations

Characteris

USB Device USB 2.0 Full S

USB H ost USB 2.0 Full Speed host. 12 Mb/sec maximum. Supports USB Mass Storage Class. Bulk Only Subclass

USB Host Current Provides full 0.5 A of 5 V.

GPIB Interface GPIB access via TEK-USB-488 accessory.

Output V Frequency, typical

Data Ha

tic

oltage and

Description

USB-TMC communications with Tektronix extensions. Standard

only. Prov Standard

Standard

Output voltage: 5.0 V ±10% into 1 MΩ load.Probe Compensator, Frequency: 1 kHz

ides full 0.5 A of 5 V.

ndling Characteristics

peed device. 12 Mb/second maximum. Supports PICTBRIDGE compatibility and provides

Table 6: Data handling characteristics

cteristic

Chara

ntion of Front

Rete Panel Settings

Stored Waveforms and Multiple Front Panel

tings

Set

iption

Descr

Front panel settings are stored periodically in memory. The settings are not lost when the instrument is

ed off or if there is a power failure.

turn Two Channel 1, Channel 2, or Math waveforms can be stored in nonvolatile waveform memory A or

B. One, both, or neither of A or B waveform memories can be displayed. For the TDS20X4C, four

eforms, A, B, C, D, or Math can be stored. Ten user setups of the current instrument settings can be

wav saved and restored from nonvolatile memory. Additional storage is available when an appropriate mass storage device is connected via USB.

Power Distribution System

ble 7: Power distribution system

Characteristic Description

ess than 30 W a t 85 to 275 V

Power Consumption Source Voltage Full Range: 100 to 240 V Source Frequency 360 Hz to 440 Hz from 100 VACto 120 VAC.

Fuse Rating

ACRMS

45 Hz to 66 Hz from 100 V

3.15 Amps, T rating, 250 V; IEC and UL approved.

input.

± 10%, Installation Category II (Covers range of 90 to 264 V

to 240 VAC.

14 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Speciﬁcations

Mechanical Ch

aracteristics

Table 8: Mechanical characteristics

Characteris

Weight

Size

Cooling

tic

Method

Description

Requirement

2.0 k g (4.4 lbs), stand-alone instrument

2.2 kg (4.9 lbs), with accessories

3.6kg(8lbs Height Width Depth Convect

s that follow are nominal:

), when packaged for domestic shipment

ion cooled

Environmental Performance

Table 9: Environmental performance

Characteristic Description

Temperature

Humidity

Altitude

Operating 0° C to +50° C (32 °F to 122 °F), with 5° C/minute maximum gradient,

Nonoperating

ating

Oper

Nonoperating

erating

Op Nonoperating

158 mm (6.2

326.3 mm (1

124.1 mm (

nonco

-40° 5% to 5% to 45% RH above +40° C up to +50° C, noncondensing, and as limited

by a Maximum Wet-Bulb Temperature of +37° C (derates relative humidity

5 % RH at +50° C)

to 4

o 85% relative humidity (% RH) at up to +40° C

5% t 5% to 45% RH above +40° C up to + 50° C, noncondensing. Above +50° C limited by a Maximum Wet-Bulb Temperature of +37° C

erates relative humidity to 12% RH at +71° C)

to 3000 meters (10,000 feet)

p to 3000 meters (10,000 feet).

U Altitude is limited by possible damage to the L CD at higher altitudes. This

damage is independent of operation

2in)

2.85 in)

4.88 in)

ndensing, up to 3000 m altitude

C to + 71° C (-40 °F to 159.8 °F), with 5° C/minute maximum gradient

85% relative humidity (% R H) at up to +40° C

Data Logging System Characteristics (Not Available on T DS1000C-EDU M odels)

NOTE. This software feature directs the oscilloscope to autom atically collect

data over a period of time. After you conﬁgure the trigger conditions to use, you can use the data logging menu to set up the oscilloscope so that it will save all of the triggered waveform to a USB memory device, within a time duration that you have set.

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 15

Speciﬁcations

Table 10: Data l

Characteristic Description

Duration The time perio

Source The signal source which you want to save the waveform.

Select Fold

ogging system characteristics (not available on TDS1000C-EDU models)

30 min, 1 hour, 1.5 hour, 2 hour, 2.5 hour, 3 hour, 3.5 hour, 4 hour, 4.5 hour, 5 hour, 5.5 hour, 6 hour, 6.5 hour, 7 hour, 7.5 hour, 8 hour.

Channel 1, C

The ﬁle fold You can create the new folder or change the existing folder as the folder where you want to save the

waveform data.

hannel 2, Channel 3, Channel 4, Math

er where you save the waveform data.

Limit Testing System Characteristics (Not Available on TDS1000C-EDU Models)

NOTE. This software feature directs the oscilloscope to monitor an active input

signal against a template and to output pass or fail results by judging whether the input signal is within the bounds of the template.

Table 11: Limit testing system chara cteristics (not available on TDS1000C-EDU models)

teristic

Charac

Sourc

re Ref Channel

Compa

Run/Stop To enable or disable the limit testing function.

Template Setup You can use this menu item to set up a limit test waveform template. The template is the mask signal that

Source The location of the signal source that is used to create the limit test template.

Vertical Limit The vertical limit in vertical divisions.

Horizontal Limit The horizontal limit in horizontal divisions.

Destination Ref Channel The location of the reference memory location that is used to store the limit test template.

Display Template Displays or does not display a stored test template.

ption

Descri

The signal source which you want to do the limit testing.

el 1, Channel 2, Channel 3, Channel 4, Math

Chann

ference channel # where the template is saved.

The re

RefA, RefB, RefC, RefD. The limit testing system will compare the source signal with this template.

Run, Stop.

deﬁne as the boundary to compare with the input source signal. You can create the template from

you internal or external waveforms with speciﬁc horizontal and vertical tolerances.

Channel 1, Channel 2, Channel 3, Channel 4, Math

0~1000 mdiv

0~500 mdiv.

RefA, RefB, RefC, RefD.

On, Off.

16 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Table 11: Limit testing system characteristics (not available on TDS1000C-EDU models) (cont.)

Characteristic Description

Action on Violation

Stop After Deﬁnes the conditions that will cause the oscilloscope to end limit testing.

Deﬁnes the actions the o scilloscope will take after a violation is detected.

Save Image: The oscilloscope will automatically save a screen image when a violation is detected. Save Waveform: The oscilloscope will automatically save a digital copy of the source waveform when

a violation is detected.

Manual: Lets you stop the test by toggling the “Run/stop” choice. Waveforms: Lets you set the numbers of waveforms to test before stopping limit testing. Violations: Lets you set the numbers of violations to detect before stopping limit testing. Elapsed time: Lets you set the elapsed test time in seconds to pass before stopping limit testing.

Speciﬁcations

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 17

Speciﬁcations

18 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

WheretoFindOperatingInformation

For information on installing and operating your TDS2000C or TDS1000C-EDU Series Digital Storage Oscilloscope, refer to the user manual for your product. The user manu www.tektronix.com/manuals.

als are available in eleven languages and are on the Web at

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 19

Where to Find Operating Information

20 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Theory of Operation

This section covers the electrical operation of the TDS2000C and TDS1000C-EDU series oscilloscopes to the module level by describing the basic operation of e ach functional c

NOTE. The descriptions for the 2-channel and 4-channel models are slightly

different.

ircuit block.

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 21

Theory of Operation

System Level B

lock Diagrams

Two high-level block diagrams are provided, one for 2-channel models and one for 4-channel models. (See Figure 1 on page 22.) (See Figure 2 on page 23.)

Figure 1: Module-level block diagram (2-channel)

22 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Theory of Operation

Figure 2: Module-level block diagram (4-channel)

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 23

Theory of Operation

Main Board

The Main board is also called the acquisition board. The Main board of the 4-channel oscilloscopes is essentially two 2-channel oscilloscopes tied together through a common microprocessor, and some special interconnects to support combining the display and trigger systems. The focus of the Main board discussion noted as necessary.

is the 2-channel system, with differences for the 4-channel models

Acquisi

tion System

At a minimu digitizer/trigger system ASIC, a signal processing/display/system services RAM, ﬂash PROM, a system microprocessor, USB controller, USB RAM, system communication RAM, and special power supplies. For a 4-channel oscilloscope, the attenuators a re duplicated. Most of the other a spects of the circuitry remain unchanged.

Signals from the channel 1 and channel 2 and other input connectors pass through attenuators and an AC-coupling switch to the ampliﬁer ASIC. The Ext Trig input has an abbreviated version of this path, lacking some of the attenuator settings and th

The ampliﬁer ASIC contains buffers and variable gain ampliﬁers, as well as

s that provide 20 MHz bandwidth limiting. The task of the ampliﬁer ASIC

ﬁlter is to convert from a 1 MΩ single-ended environment in the front end to a much lower impedance differential (and thus less noise-sensitive) environment for the acquisition process. The ampliﬁerASICassuresthattheinputsignalisampliﬁed to a level that will allow the fullest possible use of the digitizer.

The a cquisition ASIC contains samplers and peak detectors for each input channel, a common ampliﬁer, an A/D converter, and the trigger logic. The digitized waveform samples are transferred to the processing and display

n 4-channel systems, the two acquisition ASICs are interconnected so that a

I trigger on one ASIC can cause a trigger on the other.

m, the Main board contains attenuators, an ampliﬁer ASIC, a

FPGA,

e AC coupling switch.

FPGA.

he processor system adds the m icroprocessor and ﬂash PROM to the processing

T and display system. The processor system interprets the front-panel control changes detected by the disp lay ASIC, provides control parameters based on user setting requests, computes waveform measurements, and manages the USB interfaces via the d edicated USB controller. Saved setups, waveforms, and calibration constants are stored in nonvolatile memory sections within the ﬂash PROM. The processor system shares DRAM with the display system.

24 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Theory of Operation

Processing and Display

System

Input Signal Interface

Probe Compensation

The processing 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 in a display buffer. At the same time, the waveform is read from the display buffers and written to the LCD. Additional circuitry in the display ASIC supports scanning th clock, and p erforming various memory mapping tasks required by all elementary microprocessor based system s. In a 4-channel system, the two display ASICs are interconnected so that one ASIC can 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. Channel 1 and Channel 2 data may be combined in all of the supported ways.

BNC connectors are mounted on the Main board for all signal inputs. The signal inputs are compatible with the supplied TPP0101 and TPP0201 probes.

The Probe Comp and ground terminals are provided for probe adjustment.

and display system consists of the display ASIC, DRAM, and

e front panel, handling DRAM refresh, providing the processor

External Trigger

Main Board Power

Power Supply

The Ext Trig channel is proces se d on the chain containing the highest numbered normal input channel.

To support various functions on the Main board, several secondary power sup are generated. For the ampliﬁer and acquisition ASICs, the Main board creates a +2.5 V and -2.5 V supply. The +2.5 V supply is derived from the +3.3 V logic supply. The -2.5 V supply is derived from the -4 V supply. One three-terminal regulator provides +5 V for internal uses. A second three-terminal regulator provides USB power to preclude USB faults from seriously disrupting operation of the oscilloscope.

The main power supply module for these oscilloscopes is a wide input range universal supply. It can provide about 25 W of power for the oscilloscope, while allowing the input to run from about 90 V to 264 V. Input frequency ranges from 47 Hz to 440 Hz, which allows operation in virtually all countries in the world and in several off-grid environments, such as power on military aircraft.

The secondary supplies from the power supply and the approximate current draws are listed in a table with the associated connector pins on J101. (See Table 20.)

plies

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 25

Theory of Operation

Display M odule

Front Panel

Two-Chan

Oscilloscopes

nel

The P2 connecto

For information on voltages used in the oscilloscope, refer to the Troubleshooting section of thi

The color di The unit is patterned with 320 columns x 3 sub-columns by 240 rows and has the associated drivers and backlight. The LED backlight output is about 75 mA at 15.5 V.

You can m anipulate all of the sw itches, and position encoders on the Front-Panel board of 2-channel oscilloscopes. Several LEDs are used to indicate when the Multipurpose knob is active, when Autorange is active, and when a Save action is in pr your product.

An IC o signals to the Main board. Two s ignals and a sense line are provided by the Main board to support the front panel. One of these lines resets the scan; a second line clocks the scan to the next position; and the sense line receives the current state of the selected switch or encoder position.

ogress. For more information on the LEDs, refer to the user manual for

n the Front-Panel board provides buffering and multiplexing of switch

r uses 4 positions and 3 wires, w h ich are +6 V, +3.3 V, and GND.

smanual.

splay module is a standard passive liquid crystal display (LCD).

Four-Channel

Oscilloscopes

For the encoders, some amount of debouncing occurs inside the front-pan el IC. All key debouncing is handled in the display

The LEDs are controlled by latching the value of the Channel 1 - 2 front-panel scan counter when the appropriate scan value is set.

The Front-Panel board of the 4-channel units is effectively two panels in parallel. The left side of the board is largely handled by the display FPGA 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.

FPGA on the Main board.

26 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Performance Veriﬁcation

This chapter contains performance veriﬁcation procedures for the speciﬁcations marked with the check mark. The following equipment, or a suitable equivalent, is required t

Required Equipment

o complete these procedures.

Table 12: P

Descripti

DC Voltage Leveled S Time Mark

50Ω BNC Cable BNC male to BNC male, ≈ 1 m (36 in) long 50Ω BNC Cable BNC male to BNC male, ≈ 25 cm (10 in) long 50Ω Feedthrough Termination BNC male and female connectors Dual Banana to BNC Adapter Banana plugs to BNC female BNC T Adapter BNC male to dual BNC female connectors Splitter, Power Frequency range: DC to 4 GHz.

pter (four required)

Ada Adapter Leads, 3 Black

ads, 2 Red

erformance veriﬁcation

Source

ine Wave Generator

Generator

Minimum re

17.5mVto7 50 kHz and 10 ms period, ±10 ppm accuracy

king: >2.0%

Trac

e N-to-female BNC

Mal Fem

acking Banana Plug Patch Cord, ≈ 45 cm

St (18 in) long

Stacking Banana Plug Patch Cord, ≈ 45 cm (18 in) long

quirements

V, ±0.5% accuracy

200 MHz, ±3% amplitude accuracy

ale N-to-male BNC

Examples

Wavetek 91 System with Oscilloscope Calibration Module (Option 250)

Fluke 550 Oscilloscope Calibration Option (Option 5500A-SC)

Tektronix part number 012-0482-XX Tektronix part number 012-0208-XX Tektronix part number 011-0049-XX Tektronix part number 103-0090-XX Tektronix part number 103-0030-XX Tektronix part number 015-0565-XX

Tektronix part number 103-045-XX Tektronix part number 103-0058-XX

mona #B-18-0

Pomona #B-18-2

00 Universal Calibration

0A Multi-product Calibrator with

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 27

Performance Veriﬁcation

Test Record

Table 13: Test record

Instrument Serial Number: Temperature

Date of Calibration:

Certiﬁcate Number: RH %: Technician:

Instrument performance test Minimum Incoming Outgoing Maximum

Channel 1 DC Gain Accuracy

5 mV/div 200 mV/div 2V/div

Channel 2 DC Gain Accuracy

5 mV/div 200 mV/div 2V/div

Channel 3 DC Gain Accuracy

5 mV/div 200 mV/div 2V/div

Channel 4 DC Gain Accuracy

5 mV/div 200 mV/div

2V/div Channel 1 Bandwidth Channel 2 Bandwidth Channel 3 Bandwidth Channel 4 Bandwidth

Sample Rate and Delay Time Accuracy Channel 1 Edge Trigger Sensitivity Stable trigger Channel 2 Edge Trigger Sensitivity Stable trigger Channel 3 Edge Trigger Sensitivity Channel 4 Edge Trigger Sensitivity

External Edge Trigger Sensitivity Stable trigger Channel 1 Vertical Position Accuracy,

33.6 m V 36.4 m V

1.358 V 1.442 V

13.58 V 14.42 V

33.6 m V 36.4 m V

1.358 V 1.442 V

13.58 V 14.42 V

33.6 m V 36.4 m V

1.358 V 1.442 V

13.58 V 14.42 V V

33.6 m

1.358

13.5

2.12

2.1

12 V

2divs

Stable trigger Stable trigger

36.4 m

1.442 2V

14.4

—

2divs

—

— —

Minimum margin Channel 2 Vertical Position Accuracy,

—

Minimum margin Channel 3 Vertical Position Accuracy1,

—

Minimum margin Channel 4 Vertical Position Accuracy1,

—

Minimum margin

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

The bandwidth test does not have a high limit.

Thelimitsvarybymodel. Checkthe procedure for the correct limits.

28 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Performance Veriﬁcation

Performance V

Self Calibration

eriﬁcation Procedures

Before beginning these procedures, two conditions must be met:

The oscilloscope must have been operating continuously for twenty minutes within the operating temperature range speciﬁed in the Environmental Performance table. (See Table 9.)

You must perform the S elf Calibration operation described below. If the ambient temperature changes by more than 5 °C, you must perform the Self

on operation again.

Some procedures use hazardous voltages. To prevent electrical

ges are displayed before continuing with this procedure.

Self Test

Calibrati

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

WAR N ING.

shock, always set voltage source outputs to 0 V before making or changing any interconnections.

This internal procedure is automatically performed every time the oscilloscope is powered on. No test equipment or hookups are required. Verify that no error messa

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

ld always run the routine if the ambient temperature changes by 5 °C or more.

shou

heck DC Gain Accuracy

1. Disconnect all probes and cables from the channel input connectors (channels , 3, 4).

1, 2

2. Push the Utility button and select the Do Self Cal option to start the routine.

e routine takes approximately one minute 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 table:

Push menu button Select menu option Select setting

Default Setup Channel 1 Acquire Average 16

Measure

——

Probe 1X

Source Channel under test Type Mean

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 29

Performance Veriﬁcation

3. Connect the osc

illoscope channel under test to the DC voltage source as

shown in the following ﬁgure:

4. For each vertical scale (volts/division) setting in the following table, perform the follow i ng 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 record the mean

measurement as V

c. Calculate V

diff

neg

pos-Vneg

and compare V

to the accuracy limits in

diff

the follow ing table:

Vertical Scale (volts/div) setting

5 mV/div 200 mV/div 2V/div

DC voltage source output levels Accuracy limits for V

+17.5 mV, -17.5 mV 33.6 mV to 36.4 mV +700 mV, -700 mV 1.358 V to 1.442 V +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 3 for all input channels.

diff

30 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Performance Veriﬁcation

Check Bandwidth

This test check

s the bandwidth of all input channels.

1. Set up the oscilloscope using the following table:

Push menu button Select menu option Select setting

Default Setup Channel 1 Acquire Average 16

Trig Menu

Measure

——

Probe 1X

Coupling Source Channel under test Type Pk-Pk

Noise Reject

2. Connect the oscilloscope channel under test to the leveled sine wave generator as shown in the following ﬁgure:

3. Set the oscilloscope Vertical Scale (volts/division) to 500 mV/div.

4. Set the oscilloscope Horizontal Sc ale (seconds/division) to 10 ms/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:

40 MHz if you are checking a TDS1001C-EDU

50 MHz if you are checking a TDS2001C

60 MHz if you are checking a TDS1002C-EDU

70 MHz if you are checking a TDS2002C or TDS2004B

100 MHz if you are checking a TDS1012C-EDU, TDS2012C, or

TDS2014C

200 MHz if you are checking a TDS2022C or TDS2024C

8. Set the oscilloscope Horizontal Scale (seconds/division) to 10 ns/div.

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

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 31

Performance Veriﬁcation

Check Sample R

ate

Accuracy and Delay Time

Accuracy

10. Disconnect the

test setup.

11. Repeat steps 1 through 10 for all input channels.

This test checks the time base accuracy.

1. Set up the oscilloscope using the following table:

Push menu bu

Default Se Channel 1

tup

tton

Select menu

——

Probe 1X

option

Select sett

ing

2. Connect the oscilloscope to the time mark generator as shown in the following

ﬁgure:

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

4. Set the oscilloscope Vertical Scale (volts/division) to 500 mV/div.

5. Set the oscilloscope Main Horizontal Sc ale (seconds/division) to 1ms/div.

6. Push Set To 50%.

7. Use the Ve r ti ca l Pos i ti on c ontrol to center the test signal on screen.

8. Us

etheHorizontal Position control to set the position to 10.00 ms.

9. Set the oscilloscope H o rizontal Scale (seconds/division) to 250 ns/div.

32 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Performance Veriﬁcation

10. Check that the r

ising edge of the marker crosses the center horizontal graticule line within ±2 divisions of the vertical center graticule line, as shown in the following ﬁgure:

NOTE. On

e division of displacem ent from graticule center corresponds to a

25 ppm time base error.

Check

Edge Trigger

Sensitivity

11. Disconnect the test setup.

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

1. Set up the oscilloscope using the following table:

menu button

Push

ault Setup

Def

nnel 1

Cha

Trig Menu Mode Normal

Acquire

Measure

ct menu option

Sele

——

Probe 1X

Sample Source Channel under test Type Pk-Pk

Sele

—

ct setting

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 33

Performance Veriﬁcation

2. Connect the osc

illoscope channel under test to the leveled sine wave generator

as shown in the following ﬁgure:

3. Set the oscilloscope Vertical Scale (volts/division) to 500 mV/div.

4. Set the oscilloscope Horizontal Scale (seconds/division) to 25 ns/div.

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

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

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

7. Push Set To 50%. Adjust Trigger Level as necessary and then check that triggering is stable.

p-p

8. Set the leveled sine wave generator frequency to:

40 MHz if you are checking a TDS1001C-EDU

50 MHz if you are checking a TDS2001C

60 MHz if you are checking a TDS1002C-EDU

70 MHz if you are checking a TDS2002C, or TDS2004C

100 MHz if you are checking a TDS1012C-EDU, TDS2012C, TDS2014C,

TDS2022C, or TDS2024C

9. Set the oscilloscope Horizontal Scale (seconds/division) to 5ns/div.

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

so that the measured amplitude is approximately 750 mV.(Themeasured

p-p

amplitude can ﬂuctuate around 750 mV.)

11. Push Set To 50%. Adjust Trigger Level as necessary and then check that triggering is stable.

12. For the TDS2022C and TDS2024C models, set the frequency to 200 MHz, and increase the amplitude to 1 V

. Verify stable triggering.

p-p

13. Set the oscilloscope Horizontal Scale (seconds/division) to 2.5 ns/div.

14. Change the oscilloscope setup using the following table:

34 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Performance Veriﬁcation

Push menu button Select menu option Select setting

Trig Menu

Slope

Falling

15. Push Set To 50%. Adjust Trigger Level as necessary and then check that triggering is stable.

16. D isc onnect the test setup.

17. Repeat steps 1 through 16 for all input channels.

Check External Edge

Trigger Sen sitivity

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

1. Set up the oscilloscope using the following table:

Push menu button Select menu option Select setting

Default Setup Channel 1

Trig Menu

Acquire

Measure

——

Probe 1X Source Mode Normal Sample Source CH1 Type Pk-Pk

Ext

—

2. Connect the oscilloscope to the leveled sine wave generator as shown in the following ﬁgure, using channel 1 and Ext Trig.

3. Set the oscilloscope Vertical Scale (volts/division) to 100 mV/div.

4. Set the oscilloscope Horizontal Scale (seconds/division) to 25 ns/div.

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

6. Set the sine wave generator output level to approximately 300 mV

power splitter. This is about 200 mV

on channel 1 of the oscilloscope.

p-p

into the

p-p

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 35

Performance Veriﬁcation

The Ext Trig inp

ut will also be receiving approximately 200 mV

deviations from the nominal 200 mV

oscilloscope display are acceptable.

p-p

. Small

p-p

7. Set the leveled sine wave generator frequency to:

40 MHz if you are checking a TDS1001C-EDU

50 MHz if you are checking a TDS2001C

60 MHz if you are checking a TDS1002C-EDU

70 MHz if you are checking a TDS2002C, or TDS2004C

100 MHz if you are checking a TDS1012C-EDU, TDS2012C, TDS2014C,

TDS2022C, or TDS2024C

8. Set the oscilloscope Horizontal Scale (seconds/division) to 5ns/div.

9. Push Set To 50%. Adjust Trigger Level as necessary and then check that

triggering is stable.

10. For TDS2022C and TDS2024C models, set the sine wave generator output level for a channel 1 display to approximately 350 mV

p-p

11. For TDS2022C and TDS2024C models, set the sine wave generator frequency to 200 MHz.

12. Set the oscilloscope Horizontal Scale (seconds/division) to 2.5 ns/div.

Check Vertical Position

Accuracy

13. Push Set To 5 0%. Adjust Trigger Level as necessary and then check that triggering is stable.

14. Change the oscilloscope setup using the following table:

Push menu button Select menu option Select setting

Trig Menu

Slope

Falling

15. Push Set To 5 0%. Adjust Trigger Level as necessary and then check that triggering is stable.

16. Disconnect the test setup.

The results of this test and the DC Gain Accuracy test together deﬁne the D C Measurement Accuracy of the oscilloscope. The DC Measurement Accuracy speciﬁcation encompasses two different ranges of operation over two different attenuator settings.

DC Gain Accuracy: Ide

ntiﬁes err ors, mostly from the A/D converter, when the v ertical position (known as offset in these oscilloscopes) is set to 0 divisions (or a grounded input will show screen center)

Vertical Position Accuracy: Identiﬁes errors, mostly from the position control, made when the vertical position is set to a non-zero value

36 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Performance Veriﬁcation

The two attenua

tor settings operate identically, so veriﬁcation of the attenuation

range from -1.8 V to 1.8 V also veriﬁes the attenuation range of -45 V to 45 V.

1. Set up the oscilloscope as shown in the following table:

Push menu button Select menu option Select setting

Default Setup

Channels 1, 2, 3, 4 Channels 1, 2, 3, 4 Volts/Div 50 mV/div

Trig Menu

Acquire

Measure

The test operates without a trigger. To maintain uniformity and to avoid false triggering on noise, the Ext trigger is the recommended source.

——

Probe 1X

Source Mode Auto Sample Source Channel under test Type Mean

Ext

—

2. Make a spreadsheet approximately as shown in the example in Appendix A. You only need to enter the values for column A and the equations. The values incolumnsB,C,D,E,F,andGareexamplesofthemeasuredorcalculated values.

The PDF versio n of the service manual (which you can download from www.tektronix.com/manuals), includes an empty spreadsheet for your convenience. To access and save the test spreadsheet, see the instructions in Appendix A: Example of a Vertical Position Accuracy Test Spreadsheet on page A-1.

3. Connect the oscilloscope, power supply, and voltmeter as shown in the following ﬁgure:

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 37

Performance Veriﬁcation

4. Set the power su Test Voltage.

5. Adjust the ver center of the screen.

6. Enter the vo in the appropriate columns, B and C.

7. Repeat step

8. Swap the connections to the positive term inal of the power supply with those

at the n ega

pply to the 1.8 V value shown in column A, the Approximate

tical position k nob for the DC line to position the line in the

ltage on the voltmeter and on the oscilloscope into the spreadsheet

s 4 through 6 for the values of 1.76 V through 0 V.

tive terminal as shown in the following ﬁgure:

9. Repeat steps 4 through 6 for the values of -0.04 V through -1.8 V.

10. Enter the Minimum Margin number (cell I16) for the channel tested in the

test record.

11. Repeat steps 1 through 10 for all input channels.

38 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Performance Veriﬁcation

Data veriﬁcati

columns D, E, and F. Verify that no error values (the blue line in the center) go above the yellow line (upper line), or below the purple line (lower line). For calculations involved in this example, refer to the data in the previous table (see step 1).

on. To verify data, set the spreadsheet to present a line graph of

Figure 3: Example of a line graph for the Vertical Position Accuracy test

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 39

Performance Veriﬁcation

40 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Adjustment Procedures

This section contains adjustment procedures for the TDS2000C and TDS1000C-EDU 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 p erform ing any service p rocedures. Refer to the user manual for information about using these oscilloscopes.

NOTE. The voltage references inside the oscilloscopes are very stable over time

and do not require routine updates. Do not perform any procedure in this section unless the oscilloscope does not meet speciﬁcations. Refer to the Performance Ver iﬁcation section to check the oscilloscope performance to speciﬁcations.

Required Equipment

The equipment described in the following table, or a suitable equivalent, is required to com plete these procedures. (See Table 14.)

Table 14: Required equipment

Description Minimum requirements s Example

DC Voltage Source -20 V to 20 V, ± 0.1% accuracy Leveled Sinewave Generator 5 kHz and 200 MHz, ±0.6% amplitude accuracy

50 Ω BNC Cable BNC male to BNC male, ≈ 1 m (36 in) long 50 Ω BNC Cable (seven) BNC male to BNC male, ≈ 25 cm (10 in) long 50 Ω Feedthrough Termination BNC male and female connectors Dual Banana to BNC Adapter Banana plugs to BNC female BNC T (three) One m ale and two female BNC connectors

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

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

Tektronix part number 012-0482-XX Tektronix part number 012-0208-XX Tektronix part number 011-0049-XX Tektronix part number 103-0090-XX Tektronix part number 103-0030-XX

Adjustment Procedure

The adjustment procedure consists of 70 steps for the 2-channel oscilloscope, and 106 steps for the 4-channel model. Each step requires an external voltage source for new calibration constants.

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

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 41

Adjustment Procedures

Enable the Service Menu

If all steps in t displayed and the new calibration constants take effect. If any step fails, the procedure is aborted and the current calibration is not affected. You can choose to abort the procedure at a ny step, without affecting the current calibration, by selecting FCAL ABORT.

NOTE. While performing the adjustment procedure, keep in mind that some of the

steps take a

Equipment setups are shown in the following ﬁgure. (See Figure 4 on page 43.) Signal re on page 45.)

Before performing the adjustment procedure, enable the Service menu as follows:

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 button.

he procedure are completed successfully, a "Pass" message is

signiﬁcant amount of time (up to 5 minutes) to complete.

quirements for each step are shown in the following table. (See Table 15

5. Push

6. Wait at least two seconds.

7. Release the Single button.

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

9. Push the front-panel Utility button. The last item in the Utility m enu is now

At completion of the Adjustment procedure, disable the "Service" menu through the Utility front panel button, the "Service" option button, and the "Ser vice" Mode Off" option button.

and hold the front-panel AutoSet button.

screen stating "Service mode ON."

"Service."

42 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Adjustment Procedures

Figure 4: Adjustment setups

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 43

Adjustment Procedures

Adjustment Procedure

Use this proced

uretoloadnewcalibrationconstants.

1. Enable the Service menu. (See page 42, Enable the Service Menu.)

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 allow a 10-minute warm up. After

10 minutes, 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 F

CAL INIT option button to initiate the factory calibration routine.

You are now in step 1 of the procedure.

9. As indic

ated by step 1, connect a 0.0 V

source to the channel inputs. (See

Table 15.)

10. Press F

CAL STEP to load the calibration constant for step 1.

11. Follow t h e screen prompts and the Adju stm ent setup table for the remainder

routine, applying the proper signal for each step. (See Table 15.)

of the

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.

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 succ es sfully, a "Pass" message is d isplayed and the new adjustment takes effect.

12. Compensate the signal path by p erfo rm ing the self-calibration routine.

13. Disconnect all probes and cables from the channel input connectors.

14. Press the Utility button and select Do Self C al to conﬁrm that you are ready

to proceed.

15. Disable the Service menu option by pushing the Utility front-panel button and the Service and ServiceModeOffoption buttons.

44 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Adjustment Procedures

Table 15: Adjus

Input Setup diagram Step number Signal Signal source setting

Ch 1 through Ch x

Ext Trig

tment steps

DC voltage 1

DC voltage 2

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 1 2 21 22 23 24 25 26 27 28 29 30 31 32 33 34

DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1 DC Voltage 1

DC Voltage 1 9 0

DC Voltage 1

DC Voltage 2

0.0 V

-20.0 V

-2.0 V

-1.6 V

-1.2 V

-0.8 V

-0.4 V

-0.32 V

-0.2 V

-0.16 V

-0.08 V

-0.04 3V

-0.0 2V

-0.0

015 V

-0.

15 V

0.0

02 V

03 V

.04 V

.08 V

0.16 V

0.2 V

0.32 V

0.4 V

0.8 V

1.2 V

1.6 V

2.0 V

20.0 V

0.0 V

-5.0 V

-1.0 V

1.0 V

5.0 V

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 45

Adjustment Procedures

Table 15: Adjustment steps (cont.)

Input Setup diagram Step number Signal Signal source setting

Ch 1

Sinewave generator

Edge 53

Ch 2 Sinewave

generator

35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52

54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70

Sinewave Generator, 50 Ω Sinewave Generator, 50 Ω Sinewave Generator, 50 Ω Sinewave Generator, 50 Ω Sinewave Generator, 50 Ω Sinewave Generator, 50 Ω Sinewave Generator, 50 Ω Sinewave Generator, 50 Ω Sinewave Generator, 50 Ω Sinewave Generator, 50 Ω Sinewave Generator, 50 Ω Sinewave Generator, 50 Ω Sinewave Generator, 50 Ω Sinewave Generator, 50 Ω Sinewave Generator, 50 Ω Sinewave Generator, 50 Ω Sinewave Generator, 50 Ω Sinewave Generator, 50 Ω Edge, 50 Ω. Sinewave Generator, 50 Ω Sinewave Generator, 50 Ω Sinewave Generator, 50 Ω Sinewave Generator, 50 Ω Sinewave Generator, 50 Ω Sinewave Generator, 50 Ω Sinewave Generator, 50 Ω Sinewave Generator, 50 Ω Sinewave Generator, 50 Ω Sinewave Generator, 50 Ω Sinewave Generator, 50 Ω Sinewave Generator, 50 Ω Sinewave Generator, 50 Ω Sinewave Generator, 50 Ω Sinewave Generator, 50 Ω Sinewave Generator, 50 Ω Sinewave Generator, 50 Ω

5kHz,1V 1 MHz, 100 mV 1MHz,1V 50 kHz, 1 V 20 MHz, 1 V BWL, 25 mV BWL, 50 mV BWL, 100 mV BWL, 250 mV BWL, 500 mV BWL, 1 V 5kHz,2.5V 1MHz,2.5V 50 kHz, 2.5 V 20 MHz, 2.5 V BWL, 2.5 V BWL, 5 V BWL, 1.6 V

p-p

1 kHz, 0 to -800 mV 5kHz,1V 1 MHz, 100 mV 1MHz,1V 50 kHz, 1 V 20 MHz, 1 V BWL, 25 mV BWL, 50 mV BWL, 100 mV BWL, 250 mV BWL, 500 mV BWL, 1 V 5kHz,2.5V 1MHz,2.5V 50 kHz, 2.5 V 20 MHz, 2.5 V BWL, 2.5 V BWL, 5 V

p-p

46 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Adjustment Procedures

Table 15: Adjustment steps (cont.)

Input Setup diagram Step number Signal Signal source setting

Ch 3 (4–Ch models only)

Ch 4 (4–ch models only)

Sinewave generator

71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87

88 Edge 89 Sinewave

generator

100

101

102

103

104

105

106

5kHz,1V 1 MHz, 100 mV 1MHz,1V 50 kHz, 1 V 20 MHz, 1 V BWL, 25 mV BWL, 50 mV BWL, 100 mV BWL, 250 mV BWL, 500 mV BWL, 1 V 5kHz,2.5V 1MHz,2.5V 50 kHz, 2.5 V 20 MHz, 2.5 V BWL, 2.5 V BWL, 5 V BWL, 1.6 V

p-p

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 47

Adjustment Procedures

48 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Maintenance

Preventing ESD

This chapter contains the informationneededtodoperiodicandcorrective maintenance on the oscilloscope, as well as repackaging instructions to use if you need to return the oscilloscope to Tektronix for service.

Before servicing this product, read the Safety Summary and Introduction at the front of the manual and the electrostatic discharge (ESD ) information below.

CAUTION. Static discharge can damage any semiconductor component in this

oscilloscope.

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

Minimize handling of static-sensitive modules.

Transport and store static-sensitive modules in their static protected containers or on a metal rail. Label any package that contains static-sensitive modules.

Inspection and Cleaning

Inspection and cleaning are done a s preventive maintenance. Preventive maintenance, when done regularly, can prevent oscilloscope malfunction and enhance its reliability.

Preventive maintenance consists of visually inspecting and cleaning the osc maintenance depends on the severity of the environment in which you use the oscilloscope. A good time to perform preventive maintenance is just before adjustment of the oscilloscope.

Discharge the static voltage from your body by wearing a grounded antistatic wrist strap while handling these modules.

Service static-sensitive modules only at static-free workstations. Do not allow anything capabl e of generating or holding a static charge on the workstation surface.

Handle circuit boards by the edges when possible.

Do not slide the modules over any surface.

Avoid handling modules in areas th capable of generating a static charge.

illoscope, and using general care when operating it. How often you do

at have a ﬂoor or work-surface covering

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 49

Maintenance

General Care

Interior Cleaning

For best perfor

Protect the oscilloscope from adverse weather conditions. The oscilloscope is not waterproo

Do not store or leave the oscilloscope w here the liquid crystal display (LCD) is exposed t

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

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

Use a dry, low-velocity stream of air to clean the interior of the chassis. Use a soft-bristle, non-static-producing brush for cleaning around components. If you must use and rinse with deionized water.

WARNING. To avoid injury, power o ff the instrument and disconnect it from line

voltage before performing any procedure that follows.

mance, follow these recommendations:

o direct sunlight or high humidity for long periods of time.

g normal operation.

quids, or solvents.

a liquid for minor interior cleaning, use a 75% isopropyl alcohol solution

Exterior Cleaning

ION. Avoid the use of chemical cleaning agents, which might damage the

CAUT

plastics used in this oscilloscope. Use only deionized water when cleaning the menu buttons or front-panel buttons. Use a 75% isopropyl alcohol solution as a cleaner and rinse with deionized water. Bef ore u sing any other type of cleaner, consult your Tektronix Service Center or representative.

Clean the exterior surfaces of the chassis with a dry lint-free cloth or a soft-bristle brush. If any dirt remains, use a cloth or swab dipped in a 75% isopropyl alcohol solution. Use a swab to clean narrow spaces around controls and connectors.

o not use abrasive compounds on any part of the chassis that m ay damage the

D chassis.

CAUTION. To prevent getting moisture inside the oscilloscope during e xternal

cleaning, use only enough liquid to dampen the cloth or applicator.

Clean the On/Standby switch using a dampened cleaning towel. Do not spray or wet the switch directly.

50 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Maintenance

If the display i

s very dirty, moisten the wipe with distilled water or a 75% isopropyl alcohol solution and gently rub the display surface. Avoid u sing excess force or you may damage the plastic display surface.

Exterior Inspection

Inspect the o

utside of the oscilloscope for damage, wear, and missing part. (See Table 16.) Immediately repair defects that could cause personal injury or lead to further damage to the oscilloscope.

Table 16: External inspection checklist

Item Inspect for Repair action

Front and rear case

Front-panel knobs Missing, damaged, or loose knobs Connectors

Carrying handle, and cabinet feet Correct operation Repair or replace defective module Accessories

Cracks, scratches, deformations, damaged hardware

Broken shells, cracked insulation, and deformed contacts. Dirt in connectors

Missing items or parts of items, bent pins, broken or frayed cables, and damaged connectors

Repair or replace defective module

Repair or replace missing or defective knobs Repair or replace defective modules. Clear

or wash out dirt.

Repair or replace damaged or missing items, frayed cables, and defective modules

Interior Inspection

To access the inside of the oscilloscope for inspection and cleaning, refer to the

val Procedures in this section.

Remo

Inspect the internal portions of the oscilloscope for damage and wear. (See

le 17.) Repair any defects immediately.

Tab

If any circuit board is repaire d or replaced, check the table to see if it is necessary

adjust the oscilloscope. (See Table 17.)

CAUTION. To prevent damage from electrical arcing, make sure that circuit

boards and components are dry before applying power to the oscilloscope.

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 51

Maintenance

Table 17: Inter

Item Inspect for Repair action

Circuit boards

Resistors Burned, cracked, broken, blistered

Solder conn

Capacitor

Wiring and

Chassis Dents, deformations, and damaged

Cleaning Procedure,

nal inspection checklist

ections

cables

Interior

Loose, broken connections. Burned circuit boards. Burned, broken, or cracked circuit-run plating.

condition. Cold s o lder

Damaged or solder on leads or terminals.

Loose plug or frayed wiring.

hardware.

, or corroded solder

or rosin joints.

leaking cases. Corroded

s or connectors. Burned, broken,

Remove and rep

Remove and replace damaged circuit board.

Resolder joint and clean with isopropyl alcohol.

Remove and replace damaged circuit board.

Firmly sea modules with defective wires or cables.

Straighten, repair, or replace defective hardware.

t connectors. Repair or replace

To clean the oscilloscope interior, perform the following steps:

1. Blow off dust with dry, low-pressure, d eionized 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.

lace damaged circuit board.

STOP. If, after performing steps 1 and 2, a module is clean on inspection, skip steps 3, 4, and 5. Proceed with step 6.

3. 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

ay washed using a solution of 75% isopropyl alcohol.

spr

During cleaning of the Acquisition board (Main board), make sure that

residue is left in the attenuators. Debris or residue can cause several

no problems with signal ﬁdelity that cannot be corrected by calibration. When handling the board, avoid handling the attenuators s ince skin oils may cause problems.

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

52 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Maintenance

lint-free rags the best cleaning with the least opportunity for dam age to the assembly.

The Front-Pan inside the knob encoders. To avoid this, be careful not to drip liquid or blow debris into the encoders.

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

5. Use hot (49 °C to 60 °C / 120 °F to 140 °F) deionized water to thoroughly rinse the parts.

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

7. Dry all co

low-temperature (52 °C to 66 °C / 125 °F to 150 °F) circulating air.

Lubrication. Periodic lubrication is not required for the oscilloscope.

mponents and assemblies in an oven or drying compartment using

moistened in isopropyl alcohol and/or deionized water offer

el module can be damaged by deposition of ﬁlm or debris

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 53

Maintenance

Removal and Installation Procedures

WARNING. Only qualiﬁed personnel should perform service procedures. Before

doing this or a Summary and Service Safety Summary found at the beginning of this manual. To prevent damage to electrical components, refer to Preventing ESD. (See page 49, Preventing ESD.)

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

Refer to the module locator drawings to ﬁnd the modules that you want to remove or install. (See Figure 5 on page 55.) (See Figure 6.)

Refer to the Inspection and Cleaning procedure if you are disassembling the instrument for cleaning. (See page 49, Inspection and Cleaning.)

Refer to the Replaceable Parts List for a list of all replaceable modules and their part numbers.

ny other procedure in this manual, read the General Safety

Summary of Procedures

Refer to the Exploded View Diagrams for each procedure, as indicated in the table.

Complete disassembly is best achieved by following the procedures in the order

n in the following table:

give

Procedure Begins on page

Feet

Rear

p Feet

Fli

nt-Panel Knobs

Fro Rear Case (See page 58, Rear Case.)

ont Feet

Fr Power Supply Module (See page 60, Power Supply Module.)

nternal Assembly

I Front-Panel Cable (See page 62, Front-Panel Cable.) Main Board Module

Display Module Front-Panel Module Keypad

(See page 56, Rear Feet.) (See page 57, Flip Feet.) (See page 57, Front-Panel Knobs.)

(See page 59, Front Feet.)

(See page 61, Internal Assembly.)

(See page 63, Main Board Module (Serial number C030000 or later).)

(See page 66, Display Module.) (See page 67, Front-Panel Module.) (See page 68, Keypad.)

54 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Maintenance

Figure 5: Locator for trim and cabinet removal (4-channel m odel shown)

Figure 6: Locator for internal modules (4-channel model shown)

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 55

Maintenance

Required Tools

Rear Feet

Use the followi

Torque-limiting screwdriver, long shank, 12 in-lb (1.3 N ·m) range with Torx® T-15 tip; if yo bit must be a long bit, at least 5 cm (2 in) overall length

Torque-lim

5/8 inch deep socket with wide center hole (S·K Hand Tool Corp., S-K #40820, or e

Torque wrench to 40 in-lb (4.5 N·m)

Screwdriver with 1/4 inch ﬂat blade

Pliers (all-purpose and needle-nose)

Sharp knife (X-ACTO®knife or equivalent)

3M Electrical Tape 92 with 1-mil polyimide Kapton backing, temperature rated 180 °C, UL510 Flame Retarded

You w il

Refer to the exploded view diagram. (See page 96.)

l need a ﬂat-blade screwdriver to remove the rear feet.

ng tools to remove and replace all modules in the oscilloscope:

u use a magnetic screwdriver with interchangeable bits, the T-15

iting screwdriver with Torx T-8 bit

quivalent)

Removal.

1. Place the oscilloscope face down on a so ft surface such as an anti-static mat.

2. Use a ﬂat-blade screwdriver to pry out the foot, or twist the foot as you are

removing it so that it disengages from the guides. Use care not to mar the surface of the rear case.

Installation.

1. Place the oscilloscope face down on a so ft surface such as an anti-static mat.

2. Align the slots of the rear foot with the guides in the rear case and press the

foot in.

56 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Maintenance

Flip Feet

Front-Panel Knobs

You will need a p

Refer to the exploded view diagram. (See page 96.)

Removal.

1. Place the os

2. Grip the ﬂip foot with the pliers as close to the notches as possible and

squeeze gen

3. Twist slightly to swing one hinge free of the slot.

4. Remove the ﬂip foot from the case.

Installa

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

2. Hold the ﬂip foot with the smooth side facing down.

3. Gently squeeze the foot so that the hinge on one side ﬁts into the slot, and

Refer to the exploded view diagram for the 2-channel models or the 4-channel models. (Seepage89.) (Seepage92.)

tion.

twist slightly to snap into the slot on the other side.

air of needle-nose pliers to remove the ﬂip feet.

cilloscope face down on a soft surface such as an anti-static mat.

tly on the foot.

Power Button

NOTE. Wrap the plier jaws with tape (such as e lectrical tape) to avoid scratching

the knob.

oval. Firmly grasp the knob (with pliers if necessary) and pull it away from

Rem

the front panel.

Installation. Align the keyed knob with the shaft and press the knob onto the shaft.

Refer to the exploded view diagram for either the 2-channel or the 4-channel models. (Seepage89.) (Seepage94.)

NOTE. Wrap the plier jaws with tape (such as e lectrical tape) to avoid scratching

the b utton.

Removal. Firm ly grasp the button with pliers and p ull it straight out of the cabinet.

Installation. Press the button onto the power button shaft until it snaps into place.

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 57

Maintenance

Rear Case

You will need a t procedure.

Refer to the ex

Removal.

1. Remove the p

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

3. Remove the two ESD protection covers from the rear case to expose two

screws.

4. Remove the ﬁve screws located on the rear case. Lift the handle to access the top two screws.

5. Lift the rear case off of the oscilloscope.

lation.

Instal

1. Place the oscilloscope face down on a soft surface (such as an anti-static mat).

CAUTION. Be careful not to pinch any wires or other parts between the front

ar cases.

and re

orque-limiting Torx T-15 screwdriver and pliers for this

ploded view diagram. (See page 96.)

ower button. (See page 57, Power Button.)

2. Place the rear case o nto the assembled oscilloscope and verify that:

All of the edges align with the front case.

The Li-ION b attery is vertical in the battery location.

The slots a

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 c l ockwise. A properly started screw will exhibit very little resistance going in.

3. Install the ﬁve screws in the rear case. Tilt the handle to access the top two holes.

4. Install the two ESD protection covers.

5. Install the power button. (See page 57, Power Button.)

lign near the USB connector and near the battery.

58 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Maintenance

Front Feet

You will need a t procedure.

Refer to the ex models. (Seepage89.) (Seepage92.)

Removal.

1. Remove the power button and rear case. (See p age 58, Rear Case.)

2. Slide the f

Installation. Slide the feet into the slots provided in the front case.

NOTE. If the front feet are not installed, but are available, they can be inserted

by carefully pinching them and pushing them into their slots. For example, you may need to do this if the rear case has been removed, and a foot has been rubbed off and u

nnoticed until the case is being assembled.

orque-limiting Torx T-15 screwdriver and pliers for this

ploded view diagram for the 2-channel models or the 4-channel

ront feet out of the front case.

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 59

Maintenance

Power Supply Module

Use a torque-li

Refer to the exploded view diagram. (See page 94.)

Removal.

1. Remove the power button and rear case. (See page 58, Rear Case.)

2. Disconnect the following wires and cables:

The ground wire on the power supply module from the chassis ground lug.

The power supply cable on the Main board at J101. Press down on the

latch while pulling up on the cable.

3. Remove the ﬁve screws that connect the power supply module to the chassis and lift the module from the internal assembly. The two screws for the AC connector are longer than the others.

lation.

Instal

1. Align and place the power supply module into the internal assembly.

2. Install the two longer screws with thread lock into the IEC AC power

connector mounting holes.

miting Torx T-15 screwdriver and pliers for this procedure.

3. Install the three shorter screws through the power supply and into the chassis.

4. Connect the following wire and cables:

The ground wire on the power supply module to the chassis ground lug.

You may need to use pliers to secure the wire in place.

The power supply cable to the Main board at J101. Position the cable to

keep it from contacting the boards and chassis.

NOTE. Twist the power supply cable until it is tight; loops are okay. This keeps

the cable bundle together.

5. Assemble the oscilloscope by performing the installation procedure in reverse order for each mod ule that was remove d.

60 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Maintenance

Internal Assembly

Youwillneedat this procedure.

Refer to the ex

Removal.

1. Remove the f

2. Remove the power button and rear case. (See p age 58, Rear Case.)

3. Remove the ﬁve screws attaching the internal assembly to the front case.

4. Lift the entire internal assembly (consisting of the chassis, all of the boards,

and the display screen) out of the front case.

NOTE. The switch keypad will most likely remain inside the front case. You do not

need to r

Installation.

1. Install the switch keypad mat in the front case if it was removed.

2. Place the internal assembly in the front case.

emove it with the inter nal assembly.

orque-limiting Torx T-15 screwdriver and a pair of pliers for

ploded view diagram. (See page 96.)

ront-panel knobs. (See page 57, Front-Panel Knobs.)

3. Install the ﬁve screws to attach the internal assembly to the front case.

4. Asse

mble the oscilloscope by performing the installation procedure in reverse

order for each module that was removed.

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 61

Maintenance

Front-Panel Cable

You will need a t procedure.

Refer to the ex

Removal.

1. Remove the f (See page 92.)

2. Remove the

3. Remove the internal assembly. (See page 61, Internal Assembly.)

4. Remove the four screws attaching the front panel board to the chassis.

5. Open the wire clamp to release the front-panel cable.

6. Disconnect the front-panel cable at J202 on the Main board by pulling straight

up from the connector.

7. Pull on the front-panel cable assembly to disconnect the front-panel cable from J1 on the Front-Panel module.

Installation.

orque-limiting Torx T-15 screwdriver and pliers for this

ploded view diagram. (See page 94.)

ront-panel knobs. (See page 89.)

power button and rear case. (See page 58, Rear Case.)

1. Connect the front-panel cable to the Front-Panel module at J1 through the appropriate slot on the chassis.

2. Position the cable to keep it from contacting the boards and chassis, and attach it using the cable tie.

NOTE. Twist the front-panel cable until it is tight; loops are okay. This keeps the

ble bundle together.

3. Connect the front-panel cable at J202 on the Main board by pushing the cable

traight down into the connector.

4. Install the four screw s to attach the front panel m odule to the chassis.

5. Assemble the oscilloscope by performing the installation procedure for each

module that was removed.

62 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Maintenance

Main Board Module (Serial

number C030000 or later)

You will need a t wrench, and a 5/8 inch deep socket for this procedure.

Refer to the ex

CAUTION. The Main board module is particularly sensitive to ESD. Read the

Preventing ESD section before removing or installing the Main board. (See page 49, Preventing ESD.)

Removal.

1. Remove the power button and rear case. (See p age 58, Rear Case.)

Remove th Assembly.)

2. Disconn

The power supply cable at J101. Press down on the latch while pulling up on th

The display ribbon cable (J1501 for 2 Ch, J2002 for 4 Ch)

The backlight wire cable (J150 2 for 2 Ch, J2001 for 4 Ch)

orque-limiting Torx T-15 long shank screwdriver, a torque

ploded view diagram. (See page 94.)

e internal assembly from the front case. (See page 61, Internal

ect the following cables from the Main board:

ecable

The front-panel cable at J202

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 63

Maintenance

Figure 7: Instrument cable locations (Main Board SN C030000 or later)

3. Use the screwdriver to remove the three screws that attach the Main board

le to the internal assembly.

modu

4. Use the socket to remove the nuts and washers from the BNC connectors.

5. Pull the board out from the front slots of the internal assembly.

stallation.

1. Work from the bottom of the internal assembly and place the front of the Main board module into the slots on the internal assembly near the BNC connectors.

2. Use the deep socket to attach the washers and nuts to each BNC connector so that the Main board is securely attached to the chassis.

64 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Maintenance

Support the BNC nuts to 40 in-lbs (4.5 N@m) using the torque wrench.

3. Install the th assembly.

4. Connect the

The power supply cable at J101

The display ribbon cable (J1501 for 2 Ch, J2002 for 4 Ch)

The backlight wire cable (J150 2 for 2 Ch, J2001 for 4 Ch)

The front-panel cable at J202

5. Assemble the oscilloscope by performing the installation procedure in reverse order for each module that was removed.

to prevent it from twisting the Main board, and torque the

ree screws attaching the Main board module to the internal

following cables on the Main board:

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 65

Maintenance

Display Module

You will need a t T-8 screwdriver, and pliers for this procedure.

Refer to the ex (See page 89.) (See page 92.)

CAUTION. Do not separate the display shield from the display module. Removing

the shield will destroy the attaching gasket.

Removal.

1. Remove th

2. Remove th e internal ass embly from the front case. (See page 61, Internal

Assembl

3. Disconnect the display backlight wire cable from the Main board. (See page 64.)

4. Disconnect the display ribbon cable from the Main board. (See page 64.)

5. Remove the power supply module. (See page 60, Power Supply Module.)

6. Remove the four screws attaching the display module to the chassis. The

screws were exposed when the power supply module was removed.

orque-limiting Torx T-15 screwdriver, a torque-limiting Torx

ploded view diagram for the 2-channel or the 4-channel models.

e power button and rear case. (See page 96.)

y.)

7. Remove the display from the chassis. Handle this assembly carefully.

Installation.

1. Position the Display module on the chassis.

2. Use the Torx T-8 screwdriver and install the four screws to a ttach the display

module to the chassis. Torque the nuts to 3 in-lbs (0.33 N@m) using the torque wrench (2.864 ±0.26 in-lbs).

3. Route the backlight and display cables through the appropriate openings in the internal assembly. (See page 64.)

4. Connect the backlight wire cable to the Main board (J1502 for 2 Ch, J2001 for 4 Ch).

5. Connect the display ribbon cable to the Main board (J1501 for 2 Ch, J2002 for 4 Ch).

6. Assemble the oscilloscope by performing the installation procedure in reverse order for each mod ule that was remove d.

66 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Maintenance

Front-Panel Module

You will need a t for this procedure.

Refer to the ex models. (Seepage89.) (SeeFigure13.)

Removal.

1. Remove the power button and rear case. (See page 96.)

2. Remove the

Assembly.)

3. Disconne holder through which the cable is routed. (See page 64.)

4. Remove t assembly.

5. Pull th

6. Pull on the front-panel cable assembly to disconnect the front-panel cable from J

Installation.

orque-limiting Torx T-15 screwdriver and a ﬂat-blade screwdriver

ploded view diagram for the 2-channel models or the 4-channel

internal assembly from the front case. (See page 61, Internal

ct the front-panel cable from J202 on the Main board. Open the wire

he ﬁve screws attaching the Front-Panel module to the internal

e module away from the internal assembly.

1 on the Front-Panel module.

1. Conn

2. Pos

3. Ins

4. As

ect the front-panel cable to J1 on the Front-Panel module b y pushing the

cable straight down into the connector.

ition the Front-Panel module on the chassis; route the front-panel cable

through the appropriate opening in the chassis. (See page 64.)

tall the ﬁve screws to attach the Front-Panel module to the internal

assembly.

semble the oscilloscope by performing the installation procedure in reverse

order for each module that was removed.

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 67

Maintenance

Keypad

You will need a t

Refer to the exploded view diagram for the 2-channel m odels or the 4-channel models. (See p

Removal.

1. Remove the p

2. Remove th e internal ass embly from the front case. (See page 61, Internal

Assembly.

3. Lift the keypad switch out of the front case.

CAUTION.

and dust inhibit good electrical contact.

ation.

Install

1. Place the front case face down on a soft surface (such as an anti-static mat).

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

holes in the keypad.

orque-limiting Torx T-15 screwdriver for this procedure.

age 89.)(See Figure 13.)

ower button and rear case. (See page 58, Rear Case.)

)

Keep the electrical contacts on the back of the keypad clean. Skin oils

CAUTION. Keep the electrical contacts on the back of the switch keypad clean.

oils and dust inhibit good electrical contact.

Skin

3. Check that all buttons are properly seated before proceeding.

4. Assemble the oscilloscope by performing the installation procedure in reverse

order for each mod ule that was remove d.

68 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Troubleshooting

Maintenance

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

WAR N ING. Before performing 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. (See page 49, Preventing ESD.)

Adjustment After Repair

If you replace the Main board or power supply, you m ust adjust the oscilloscope after repair. Refer to the chapter Adjustment Procedures.

Required Tools and

Use the f

ollowing tools and equipment to troubleshoot the oscilloscope:

Equipment

Table 18: Tools and equipment

Tools and equipment Example

Oscilloscope with 1X/10X and 100X probes

DMM 3.5 or greater digit DMM USB ﬂash d rive USB type A to type B cable Tektronix part numbers: 174-4401-00, 0.91 meters (3 feet) 174-5194-00, 1.83 meters (6 feet) PC with USB host post and

with TekVISA (OpenChoice PC

unications) installed

Comm

Troubleshooting Tree

Tektronix TDS2000C or TDS1000C-EDU series oscilloscope with standard accessory 10X probe (TPP0201 or TPP0101) and optional 100X probe (P5100 or P5200)

onix part number 119-7276-00, 128 MB

Tektr

PC with USB communication port

solate a problem to a speciﬁc troubleshooting procedure, use the

To i troubleshooting tree that is shown on the next four pages. Detailed procedures follow the tree.

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 69

Maintenance

gure 8: Oscilloscope troubleshooting tree (page 1 of 4)

70 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Maintenance

Figure 9: Oscilloscope troubleshooting tree (page 2 of 4)

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 71

Maintenance

Figure 10: Oscilloscope troubleshooting tree (page 3 of 4)

72 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Maintenance

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 73

Maintenance

Probe Comp Output

When the oscill

oscope is on and operating properly, the Probe Comp output should generate a squa re wave, approximately 5 V in amplitude, at a 1 kHz frequency. Use the oscilloscope and use a 10X TPP0101 or TPP0201 probe to probe this output.

As shown in the following table, there are two cases of defects. Either the 1 kHz signal is on and the power supply and Main board are both active and functionally capable of d

oing acquisition, or one of those two modules is not performing correctly. While many different possible frequencies exist, all involve detected failures on the Main board due to Main board failure or power s upply failure.

Table 19: Probe Comp output

Signal at Probe Comp Possible problem

1 kHz signal, no display

Non-1 kHz signal

No signal

Refer to Troubleshooting the Display. (See page 76, Troubleshooting the Display.)

Refer to Troubleshooting the Main Board. (See page 80, Troubleshooting the Main Board.)

Refer to Troubleshooting the Power Supply. (See page 75, Troubleshooting the Power Supply.)

74 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Maintenance

Troubleshooting the Power

Supply

To troubleshoo

1. Remove the rear case. (See page 58, Rear Case.)

t the power supply, follow these steps:

2. Use the test oscilloscope to measure the voltages from the power supply module at J101 on the Main board module. The following table lists the voltages yo

u should expect to see.

Table 20: Troubleshooting the power supply

Supply Voltage range

35 V

+6 V 5.5 V to 6.5 V 1.0 A 4 3, 5, 8, 10 +5 V +3.3V 3.0Vto3.6V.

-4 V -5.0 V to -3.5 V 0.8 A 9 3, 5, 8, 10 -2.5 V Line

trigger

30 V

Pin 2 connected to +3.3 V on the Main board.

Requires minimum load to maintain regulation.

-2 V to 6 V open circuit. ±1 diode drop when attached to the Main board.

With 3 W minimum load; still functions with no load.

to 40 VDCﬂoating.

Maximum current draw

15 mA 1 2

1.8 A 6, 7 3, 5, 8, 10 3.3 V, +2.5 V

1 mA 11 3, 5, 8, 10 Line trigger

J101 pow er pins

J101 return pins

Derived supplies

+28 V LCD

3. If all of the voltages are present, the Main board is probably defective. Replace it.

4. If all or some of the voltages are missing, turn off the oscilloscope and disconnect the cable at connector J101 on the Main board module.

5. Turn on the oscilloscope and check the voltages at the loose end of the cable disconnected from J101, checking for the same voltages as in step 2.

6. If all of the voltages are missing, check the line fuse on the power supply module. If the fuse is defective, replace the power supply module.

7. If the fuse is okay, and all or some of the voltages are missing, the power supply module is probably defective. Replace it.

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 75

Maintenance

Troubleshooting the

Display

To troubleshoo

1. Remove the rear case. (See page 58, Rear Case.)

2. Remove th e internal ass embly from the front case. (See page 61, Internal

Assembly.)

3. Remove the Display module. (See page 66, Display Module.)

4. Reseat the display cable to the Display m odule, making sure that the c able is

fully seated in the connector.

5. Reconnect the Display module to the internal assembly.

6. Reattach the front panel.

7. Reconnect the backlight and display cables to the Main board.

8. Power on

local Tektronix Customer Service Center for assistance.

t a nonfunctional display, follow these steps:

the oscilloscope. If the display still does not work, contact your

76 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Maintenance

Troubleshooting the Front

Panel

To troubleshoo

t an improperly functioning front pane l, follow these steps:

1. To execute the internal diagnostic tests, remove all input signals from the oscilloscope

, and enable the Service menu. (See page 42, Enable the Service

Menu.)

2. Push the UTI

LITY button and push the Service option button. The following

options appear:

Table 21: Troubleshooting the front panel – service

Menu Comments

Factory Cal Steps through the calibration routine steps. Total Ini t

Service Diag. Service Mode Off Disables the Service menu.

Writes factory default settings to all saved setups, writes factory default d and performs the same actions as the front-panel Default Setup button.

Displays the service diagnostics menus.

ata to all reference waveforms, turns off Service Mode,

3. Select Service Diag. The following options appear:

22: Troubleshooting the front panel – Service Diag

Table

Menu Comments

Mfg. Tests Displays a front-panel simulation used to check that all front panel

controls are operational.

Loop Diag.

ek/Poke

ear Error Log

Opens a menu that enables you to rerun a subset of the power-on

ftests.

sel For engineering use only.

moves all Error Log entries from memory and sets the power

Re cycle count to zero.

4. Select Mfg. Tests to start the front-panel controls test. The following options appear:

Table 23: Troubleshooting the front panel – Mfg. test

Menu Comments

Test FP

Test Screen Checks the display screen pixels with different patterns from each

Contrast Allows you to check the display contrast operation across 100%

Displays a front-panel simulation used to check the operation of all front panel controls.

All buttons must be pushed and all knobs must be turned in both directions before you can exit this test.

push of the button.

of the hardware range.

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 77

Maintenance

Table 23: Troubleshooting the front panel – Mfg. test (cont.)

Menu Comments

Warm-up Timer

Stop Test Exits the front-panel test (Test FP) and the screen test (Test

Ensures a ten-minute warm-up time for the oscilloscope before executing the calibration procedure.

Screen).

5. Select Te s t FP to start the front-panel controls test.

6. Push each button and rotate each knob to verify the operation of all controls.

If all buttons and knobs have passed the test, pushing the lower menu button (EXIT) exits the test.

7. If any button fails to operate, inspect and/or clean the switch keypad a nd the front panel board contacts. If cleaning does not solve the problem, the switch

keypad, front panel board, or M ain board may be defective. Follow the

remaining steps in this procedure to isolate the problem.

8. Repla

ce the switch keypad and retest the buttons. If the problem persists,

go to step 9.

9. Use t

he test oscilloscope and the TPP0201 probe to probe the front-panel cable connector at J202 on the Main board (2-channel models) or J1 (4-channel models). The following table describes the signals you should expect to see.

Table 24: Expected signals at J202

Signal at J202 Description

1 FPLE D_P

2 FPCLR_12_P Clear Front Panel Scan line A 6.44 kHz. Low pulsing high with

3 FPCLK_12_P Front Panel Clock line A 405 kHz. High with 50 ns pulses going

4 FPDATA12P

5 GND 0 V (ground) 6 FPTHERMSTR_P Front Panel Temp Sense About 2 VDCdepending on temperature,

7 FP _PWR 5.0 V 8 FPTHERMGND_P Temp Sense Return Ground. 9 GND 0 V (ground)

LED latch line 6.44 kHz. High with 120 ns low pulses. Location of pulse relative to FPCLR_12_P determines which lights are lit.

50 ns pulses. Determines beginning of a scan sequence for ﬁrst half of front panel.

low. Each clock after FPCLR_12_P increments the scan location by one.

Front P anel Scan Data line A No ﬁxed pattern. Stable when triggered from FPCLR_12_P. Pattern depends on rotation of knobs being scanned.

contrast setting, and display type.

78 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Maintenance

Table 24: Expected signals at J202 (cont.)

Signal at J202 Description

10 FPDATA_34_P

Front Panel Scan Data line B No ﬁxed pattern. Stable when triggered from FPCLR_34_P. Pattern depends on rotation of knobs being scanned.

11 FPCLR_34_P

Front Panel Clock line B 405 kHz. High with 50 ns pulses going low. Each clock after FPCLR_34_P increments the scan location by one.

12 FPCLK_34_P

Clear Front Panel Scan line B 6.44 kHz. Low pulsing high with 50 ns pulses. Determines beginning of a scan sequence for second half of front panel.

Unused and open on 2-channel m odels.

Unused and tied low on 2-channel models.

11. If all of the signals are present, the Front-Panel board is probably defective. Replace it.

12. If some or all of the signals are missing, continue with step 13.

13. Turn off the oscilloscope and disconnect the front-panel cable from the Main

board at connector J202.

14. Turn on the oscilloscope and check connector J202 for the same signals as in step 9.

15. If some or all of the signals are missing, the Main board is probably defective. Replace it.

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 79

Maintenance

Troubleshooting the Main

Board

To troubleshoo

1. Remove the rear case. (See page 58, Rear Case.)

t the Main board (acquisition module), follow these steps:

2. Use the test oscilloscope to measure the voltages from the power supply module at J101 on the Main board module. The follow ing table lists the voltages yo

ushouldexpecttosee.

Table 25: Troubleshooting the Main board

Supply Voltag e range

35 V

+6 V 5.5 V to 6.5 V 1.0 A 4 3, 5, 8, 10 +5 V +3.3 V 3.0 V to 3.6 V. Requires minimum load to

-4 V -5.0 V to -3.5 V 0.8 A 9 3, 5, 8, 10 -2.5 V Line

trigger

With3W

30 V

to +3.3 V on the Main board.

maintain regulation.

-2 V to 6 V open circuit. ±1 diode drop when attached to the Main

board.

minimum load; still functions with no load.

to 40 VDCﬂoating. Pin 2 connected

Maximum current draw

15 mA 1 2

1.8A 6,7 3,5,8,10 3.3V,+2.5V

1 m A 11 3, 5, 8, 10 Line trigger

J101 power pins

J101 return pins

Derived supplies

+28 V LCD

Running Diagnostics

Troubleshooting Input

nections

Con

3. If all of the voltages are present, the Main board is probably defective.

ce it.

Repla

The oscilloscope runs an extensive self-diagnostic routine at every power-on. Running the diagnostics from the Service menu will provide no additional

rmation and therefore is not needed. The menu selections are only used during

info manufacturing of the oscilloscope.

Follow these steps to troubleshoot the input connections only if the oscilloscope

pears to function normally in every way, but an input signal is not getting into

ap the oscilloscope as expected.

80 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Maintenance

Troubleshooting the USB

Interface

Using the Error Log

1. Remove the rear

case. (Seepage58,Rear Case.)

2. Check that the coaxial connections to the back side of the BNC connectors are intact. Use the DMM to measure continuity from the front side of the BNC connector to the point where it attaches to the Main board.

NOTE. The ground side of the BNC has thre

e connections (two mounting lugs and one signal wire) while the center connection has one. Incomplete or poor connection of the ground side may cause AC signal quality problems without affecting DC measurement capability.

3. If no problem is found and the trouble persists, the Main board is probably

defective in some way that the internal diagnostics cannot detect. Replace it.

To troubleshoot the USB interface, if the acquisition is working, and the USB is not, replace the Main board.

Failures that occur during the power-up diagnostics or normal oscilloscope operation place an entry in the error log.

Accessing the error log. The error log list can be accessed anytime by pushing the UTILITY button and selecting Error Log.

The following table lists the error c odes and probable causes. (Se e Table 26.)

Table 26: List of error codes

Error code D escription Probable cause

0 DI Diagnostics internal error 1DI 2DI 3DI 4DI 5DI 6DI 7DI 12 DI 13 DI 14 DI 15 DI 16 DI 17 DI 255

ADG522 diagnostics failed Main board or power supply failure PROM diagnostics failed Main board or power supply failure MEMORY diagnostics failed Main board or power supply failure Ch 1 diagnostics failed Main board or power supply failure Ch 2 diagnostics failed Main board or power supply failure Line trigger diagnostics failed Main board or power supply failure ADG421 diagnostics failed Main board or power supply failure Ch 3 diagnostics failed Main board or power supply failure Ch 4 diagnostics failed Main board or power supply failure ADG421 #2 diagnostics failed Main board or power supply failure ADG522 #2 diagnostics failed Main board or power supply failure DRAM2 diagnostics failed Main board or power supply failure USB diagnostics failed Main board or power supply failure Software Contact Tektronix

Contact Tektronix

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 81

Maintenance

Clearing the er

steps:

1. Enable the Ser

2. Push the UTILITY button and push the Service option button to display

the Service

3. Push the Service Diag. option button to display the Diagnostics menu.

4. Push the Clear Error Log option button to clear the error log of past failures.

This also sets the Power Cycle count to zero.

ror log. To cle ar the error log after ﬁxing a problem, follow these

vice menus. (See page 42, Enable the Service Menu.)

menu.

82 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Repackaging Instructions

Use these procedures to repackage the oscilloscope for shipment or storage.

Maintenance

Packaging

Storage

Use a corruga (275 pounds), and with an inside dimension at least 15.25 cm (six inches) greater than the oscilloscope dimensions. Make s ur e that the oscilloscope is adequately padded with a cushioning material like foam, paper, or bubble wrap. The oscilloscope should not move around inside the carton when the carton is sealed.

If the oscilloscope is being shipped to a Tektronix Service Center, enclose the following information:

The owner address

Name and phone number of a contact person

Type and serial number of the oscilloscope

Reason

A complete description of the service required

Seal the shipping carton with an industrial stapler or strapping tape.

Mark the address of the Tektronix Service Center and also your own return address on the shipping carton in two prominent locations.

The oscilloscope should be stored in a clean, dry environment. The following environmental characteristics apply for both shipping and storage (oscilloscope not operating):

ted cardboard shipping carton having a test strength of at least 125 kg

for returning

Temperature range: -40 °C to +71 °C (-40 °F to 159.8 °F)

Altitude: To 3,000 m (approximately 10,000 ft)

The chapter on Speciﬁcations lists the environmental characteristics. (See page 1, Speciﬁcations.)

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 83

Maintenance

84 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Diagrams

This section describes the electrical operation o f the TDS2000C and TDS1000C-EDU series oscilloscopes using the major circuit blocks or modules. The oscilloscope module interconnections are shown in the ﬁgure. (See Figure 11.)

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 85

Diagrams

The shaded area 4-channel oscilloscopes.

in the ﬁgure represents modules and circuits used only in

gure 11: TDS2000C and TDS1000C-EDU series block diagram

86 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Replaceable Parts

This chapter contains a list of the replaceable modules for the TDS2000C and TDS1000C-EDU oscilloscopes. Use this list to identify a nd order replacement parts.

Parts Ordering Information

Replacement parts are available through your local Tektronix ﬁeld ofﬁce or representative.

Changes to Tektronix products are sometimes made to accommodate im proved components as they become available and to give you the beneﬁt of the latest improvements. Therefore, when ordering parts, it is important to include the following information in your order:

Part number

Instrument type or model number

Instrument serial number

Instrument modiﬁcation number, if applicable

Part Number Revision

Level

Module Servicing

If you order a part that has been replaced with a different or improved part, your local Tektronix ﬁeld ofﬁce or representative will contact you concerning any change in part number.

Tektronix part numbers contain two digits that show the revision level of the part. For some parts in this manual, you will ﬁnd the letters XX in place of the revision level number.

When you order parts, Tektronix will provide you with the most current part for your product type, serial number, and modiﬁcation (if applicable). At the time of your order, Tektronix will determine the part number revision level needed for your product, based on the information you provide.

Modules can be serviced by selecting one of the following two options. Contact your local Tektronix service cente r or representative for repair assistance.

Module exchange. In some cases you may exchange your module for a remanufactured module.

TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual 87

Replaceable Parts

These modules c

ost signiﬁcantly less than new modules and meet the same factory speciﬁcations. For more information about the module exchange program, call 1-800-833-9200 and select option 2.

New modules. You m ay purchase replacement modules in the same way as other replacement parts.

Using the Replaceable Parts List

This section contains a list of the mechanical and/or electrical components that are replaceab parts. The follow ing table describes each column in the parts list.

Table 27: Replaceable parts list

Column Column name Description

2Tektro

3 and 4

5 6

Figure & Index Number Items in this section are referenced by

Serial Number Column three indicates the serial number at

Qty This indicates the quantity of parts used. Name & Description An item name is separated from the

le for the oscilloscope. Use this list to identify and order replacement

nd index numbers to the exploded

ﬁgure a view illustrations that follow.

nix Part Number

s part number when ordering

Use thi replacement parts from Tektronix.

which the part was ﬁrst effective. Column

ndicates the serial number at which the

four i part was discontinued. No entries indicates the part is good for all serial numbers.

cription by a colon (:). Because of space

des limitations, an item name may sometimes appear as incomplete. Use the U.S. Federal

alog handbook H6-1 for further item

Cat name identiﬁcation.

Abbreviations

Abbreviations conform to American National Standard ANSI Y1.1-1972.

88 TDS2000C and TDS1000C-EDU Series Oscilloscope Service Manual

Tektronix TDS1001C EDU, TDS1002C EDU, TDS1012C EDU, TDS2001C, TDS2002C Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual