Tektronix TDS3052B, TDS3064B, TDS3054B, TDS3044B, TDS3034B Service Manual

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Service Manual

TDS3000B Series Digital Phosphor Oscilloscopes

071-0972-04

This document supports firmware version 3.00 and above for TDS3000B Series instruments only.

Warning

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

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

Printed in the U.S.A.

Tektronix, Inc., P.O. Box 500, Beaverton, OR 97077

TEKTRONIX, TEK, TEKPROBE, and Tek Secure are registered trademarks of Tektronix, Inc.

DPX, WaveAlert, OpenChoice, and e*Scope are trademarks of Tektronix, Inc.

Specifications

Operating Information

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

Service Safety Summary xi....................................

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

Contacting Tektronix xiv.............................................

Specifications 1--1...................................................

Connecting Power 2--2................................................

Installing an Application Module 2--7....................................

Installing a Communication Module 2--8.................................

Front-Panel Menus and Controls 2--9....................................

Front-Panel Connectors 2--18...........................................

Rear-Panel Connectors 2--19............................................

Communication Module Connectors 2--20.................................

Probe Compensation 2--21..............................................

Self Calibration 2--22..................................................

Transporting the Oscilloscope 2--23......................................

Theory of Operation

Power Supply 3--1...................................................

Battery Board 3--2...................................................

Main Board 3--2.....................................................

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

Front-Panel Board 3--3................................................

Disk Drive 3--3......................................................

Performance Verification

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

Performance Verification Procedures 4--5.................................

Adjustment Procedures

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

Overview of the Adjustment Process 5--2.................................

Signal Connections 5--3...............................................

Factory Adjustment Procedure 5--6......................................

TDS3000B Series Service Manual

Table of Contents

Maintenance

Options

Electrical Parts List

Diagrams

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

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

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

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

Troubleshooting 6--39.................................................

Troubleshooting Procedure 6--40.........................................

Unpacking and Repacking Instructions 6--43...............................

Options 7--1........................................................

Electrical Parts List 8--1..............................................

Diagrams 9--1.......................................................

Mechanical Parts List

Parts Ordering Information 10--1.........................................

Using the Replaceable Parts List 10--2....................................

TDS3000B Series Service Manual

List of Figures

Table of Contents

Figure 3--1: TDS3000B series block diagram 3--1...................

Figure 6--1: Pulling the hub pin 6--8..............................

Figure 6--2: Releasing the hub assembly 6--9.......................

Figure 6--3: Reinstalling a hub cover 6--11..........................

Figure 6--4: Communication module guide 6--12.....................

Figure 6--5: Main board disk drive flex cable connector J800 6--13.....

Figure 6--6: Removing the bezel from a new disk drive 6--14...........

Figure 6--7: Rear chassis cables to the main board 6--16..............

Figure 6--8: Installing the fan, line filter, and line power cable 6--18.....

Figure 6--9: Installing the AC line filter and shield 6--19..............

Figure 6--10: Installing the line filter and line power cable 6--20........

Figure 6--11: Removing the J500 connector clip 6--22.................

Figure 6--12: Disconnect main board cable connectors 6--23...........

Figure 6--13: Main Board 6--24...................................

Figure 6--14: Install the J500 connector clip 6--26....................

Figure 6--15: Front chassis 6--27..................................

Figure 6--16: Display module 6--28................................

Figure 6--17: Front-panel cable routing 6--29........................

Figure 6--18: Disconnect back light cables 6--30.....................

Figure 6--19: Remove inverter board 6--31..........................

Figure 6--20: Remove display from display chassis 6-- 32..............

Figure 6--21: Remove back light tube 6--33.........................

Figure 6--22: Installing display glass shield 6--34.....................

Figure 6--23: Remove front-panel knobs 6--35.......................

Figure 6--24: Remove front-panel board 6--36.......................

Figure 6--25: Remove front-panel keypads 6--37.....................

Figure 6--26: Checking front-panel lock nuts 6--38...................

Figure 6--27: Primary troubleshooting procedure 6--40...............

Figure 6--28: AC power supply troubleshooting procedure 6--41........

Figure 6--29: Module isolation troubleshooting procedure 6--42........

TDS3000B Series Service Manual

iii

Table of Contents

Figure 10--1: Exploded view, front case half 10--4....................

Figure 10--2: Exploded view, LCD display 10--6.....................

Figure 10--3: Exploded view, main board and disk drive 10--8.........

Figure 10--4: Exploded view, circuit board assembly and fan 10--10......

Figure 10--5: Exploded view, rear case half 10--13.....................

TDS3000B Series Service Manual

List of Tables

Table of Contents

T able 1--1: Specifications 1--1...................................

T able 6--1: Internal inspection check list 6--3......................

Table 6--2: Removal and installation procedures 6--6................

Table 7--1: TDS3000B Series options 7--1.........................

TDS3000B Series Service Manual

Table of Contents

TDS3000B Series Service Manual

General Safety Summary

Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. To avoid potential hazards, use this product only as specified.

To Avoid Fire or Personal

Injury

Use Proper Power Cord. Use only the power cord specified for this product and certified for the country of use.

Connect and Disconnect Properly. Connect the probe output to the measurement instrument before connecting the probe to the circuit under test. Disconnect the probe input and the probe ground from the circuit under test before disconnecting the probe from the measurement instrument.

Ground the Product. When operating with AC power, this product is grounded through the grounding conductor of the power cord. To avoid electric shock, the grounding conductor must be connected to earth ground. Before making connections to the input or output terminals of the product, ensure that the product is properly grounded.

When operating with battery power, this product must still be grounded. To prevent electric shock, always connect a grounding wire between the ground terminal on the rear panel and earth ground.

Observe All Terminal Ratings. T o avoid fire or shock hazard, observe all ratings and markings on the product. Consult the product manual for further ratings information before making connections to the product.

Connect the ground lead of the probe to earth ground only.

TDS3000B Series Service Manual

vii

General Safety Summary

Replace Batteries Properly. Replace batteries only with the proper type and rating specified.

Recharge Batteries Properly. Recharge batteries for the recommended charge cycle only.

Do Not Operate Without Covers. Do not operate this product with covers or panels removed.

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

Do Not Operate With Suspected Failures. If you suspect there is damage to this product, have it inspected by qualified service personnel.

Do Not Operate in Wet/Damp Conditions.

Do Not Operate in an Explosive Atmosphere.

Keep Product Surfaces Clean and Dry.

Provide Proper Ventilation. Refer to the manual’s installation instructions for

details on installing the product so it has proper ventilation.

Safety Terms and Symbols

Terms in this Manual. These terms may appear in this manual:

WARNING. Warning statements identify conditions or practices that could result in injury or loss of life.

CAUTION. Caution statements identify conditions or practices that could result in damage to this product or other property.

Terms on the Product. These terms may appear on the product:

DANGER indicates an injury hazard immediately accessible as you read the marking.

WARNING indicates an injury hazard not immediately accessible as you read the marking.

CAUTION indicates a hazard to property including the product.

viii

TDS3000B Series Service Manual

General Safety Summary

Symbols on the Product. These symbols may appear on the product:

WARNING

High Voltage

Ethernet Port Chassis Ground

Preventing Electrostatic Damage

CAUTION. Electrostatic discharge (ESD) can damage components in the oscilloscope and its accessories. To prevent ESD, observe these precautions when directed to do so.

Use a Ground Strap. Wear a grounded antistatic wrist strap to discharge the static voltage from your body while installing or removing sensitive components.

Use a Safe Work Area. Do not use any devices capable of generating or holding a static charge in the work area where you install or remove sensitive components. Avoid handling sensitive components in areas that have a floor or benchtop surface capable of generating a static charge.

Handle Components Carefully. Do not slide sensitive components over any surface. Do not touch exposed connector pins. Handle sensitive components as little as possible.

Protective Ground

(Earth) Terminal

CAUTION

Refer to Manual

Battery

Information

Transport and Store Carefully. Transport and store sensitive components in a static-protected bag or container.

TDS3000B Series Service Manual

General Safety Summary

Product End-of-Life

Handling

Transportation and

Lithium Ion Batteries

Observe the following guidelines when recycling an instrument or component:

Mercury Notification. This oscilloscope uses an LCD backlight lamp that contains mercury. Disposal may be regulated due to environmental considerations. P lease contact your local authorities or the Electronics Industries Alliance (www.eiae.org) for disposal or recycling information.

Battery Recycling. This product may contain a Nickel Cadmium (NiCd) or lithium ion (Li-ion) rechargeable battery, which must be recycled or disposed of properly. Please properly dispose or recycle the battery according to local government regulations.

The TDS3BATB lithium ion rechargeable battery pack contains less than 8 grams of lithium, with individual cells containing less than 1.5 grams of lithium, as measured by International Civil Aviation Organization (ICAO) standards. Consult your air carrier for applicability and determination of any special lithium ion battery transportation requirements.

TDS3000B Series Service Manual

Service Safety Summary

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

procedures.

Do Not Service Alone. Do not perform internal service or adjustments of this product unless another person capable of rendering first aid and resuscitation is present.

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

Use Care When Servicing With Power On. Dangerous voltages or currents may exist in this product. Disconnect power, remove battery (if applicable), and disconnect test leads before removing protective panels, soldering, or replacing components.

To avoid electric shock, do not touch exposed connections.

TDS3000B Series Service Manual

Service Safety Summary

xii

TDS3000B Series Service Manual

Preface

This Service manual provides information to troubleshoot, disassemble, and repair the following TDS3000B Series Digital Phosphor Oscilloscopes instrument to the module level:

H TDS3012B

H TDS3014B

H TDS3024B

H TDS3032B

H TDS3034B

H TDS3044B

H TDS3052B

H TDS3054B

H TDS3064B

TDS3000B Series Service Manual

xiii

Preface

Contacting Tektronix

Phone 1-800-833-9200*

Address Tektronix, Inc.

Department or name (if known) 14200 SW Karl Braun Drive P.O. Box 500 Beaverton, OR 97077 USA

Web site www.tektronix.com

Sales support 1-800-833-9200, select option 1*

Service support 1-800-833-9200, select option 2*

Technical support www.tektronix.com/support

1-800-833-9200, select option 3*

6:00 a.m. -- 5:00 p.m. Pacific Standard time

This phone number is toll free in North America. After office hours, please leave a voice mail message. Outside North America, contact a Tektronix sales office or distributor; see the Tektronix web site for a list of offices.

xiv

TDS3000B Series Service Manual

Specifications

This appendix contains specifications for the TDS3000B Series oscilloscopes. All specifications are guaranteed unless noted as “typical.” T ypical specifications are provided for your convenience but are not guaranteed. Specifications that are marked with the n symbol are checked in Performance Verification.

All specifications apply to all TDS3000B models unless noted otherwise. To meet specifications, two conditions must first be met:

H The oscilloscope must have been operating continuously for twenty minutes

within the operating temperature range specified.

H You must perform the Compensate Signal Path operation described on

page 2--22 prior to evaluating specifications. If the operating temperature changes by more than 10 °C, you must perform the Compensate Signal Path operation again.

Table 1- 1: Specifications

Acquisition

Acquisition modes Sample (Normal), Peak detect, Envelope, and Average

Single Sequence Acquisition mode Acquisition stops after

Sample, Peak Detect One acquisition, all channels

simultaneously

Average, Envelope N acquisitions, all channels

simultaneously, N is settable from 2to256(or∞ for Envelope)

TDS3000B Series Service Manual

1- 1

Specifications

,yp

Table 1- 1: Specifications (cont.)

Inputs

Input coupling DC, AC, or GND

Channel input remains terminated when using GND coupling.

Input impedance, DC coupled

Maximum voltage at Overvoltage category Maximum voltage input BNC (1 MΩ)

Maximum voltage at input BNC (50 Ω)

Maximum floating voltage

Channel-to-channel crosstalk, typical

Differential delay, typical

1MΩ ±1% in parallel with 13 pF ±2 pF, TekProbe compatible

50 Ω ±1%; VSWR ≤ 1.5:1 from DC to 500 MHz, typical

CAT I Environment

150 V

RMS

(400 Vpk)

(refer to page 1--11)

CAT II Environment

100 V

RMS

(400 Vpk)

(refer to page 1--11)

For steady-state sinusoidal waveforms, derate at 20 dB/decade above 200 kHz to 13 V

with peaks ≤±30 V

RMS

at 3 MHz and above.

0 V from chassis (BNC) ground to earth ground, or

30 V >30 V

(42 Vpk) only under these conditions: no signal voltages

RMS

(>42 Vpk), all common leads connected to the same voltage,

RMS

no grounded peripherals attached

Measured on one channel, with test signal applied to another channel, and with the same scale and coupling settings on each channel

Frequency range Crosstalk

≤ 100 MHz ≥ 100:1

≤ 200 MHz ≥ 50:1

≤ 300 MHz ≥ 50:1

≤ 400 MHz ≥ 30:1

≤ 500 MHz ≥ 30:1

≤ 600 MHz ≥ 30:1

100 ps between any two channels with the same scale and coupling settings

1- 2

TDS3000B Series Service Manual

Specifications

Table 1- 1: Specifications (cont.)

Vertical

Number of channels TDS30x2B TDS30x4B

2 plus external trigger input 4 plus external trigger input

Digitizers 9-bit resolution, separate digitizers for each channel sample

simultaneously

SCALE Range 1MΩ 50 Ω (at BNC)

Fine SCALE Adjustable with ≥ 1% resolut ion

Polarity Normal and Invert

Position range ±5 divisions

n Analog bandwidth, 50 Ω (also typical at 1 MΩ with standard probe)

Calculated rise time, typi

1mV/divto10V/div 1mV/div to 1 V/div

Bandwidth limit set to Full, operating ambient ≤30 °C, derate 1%/°C above 30 °C

Scale range

5mV/divto 1V/div

2mV/divto

4.98 mV/div

1mV/divto

1.99 mV/div

TDS301xB 100 MHz 100 MHz 90 MHz

TDS302xB 200 MHz 100 MHz 90 MHz

TDS303xB 300 MHz 250 MHz 150 MHz

TDS304xB 400 MHz 250 MHz 150 MHz

TDS305xB 500 MHz 300 MHz 175 MHz

TDS306xB 600 MHz

300 MHz 175 MHz

TDS301xB 3.5 ns

TDS302xB

1.75 ns

TDS3000B Series Service Manual

TDS303xB 1.2 ns

TDS304xB 0.9 ns

TDS305xB 0.7 ns

TDS306xB 0.6 ns

500 MHz at 5 mV/div; 600 MHz at 10 mV/div and greater.

1- 3

Specifications

(6g

)

Offsetaccurac

y,all

[

0.005¢|offset--position|+0.1div]ranges

Note:Convertboththeconstantoffsetandpositiontermstovoltsb

Table 1- 1: Specifications (cont.)

Vertical

Analog bandwidth limit, typical

Lower frequency limit, AC coupled, typical

Peak detect or Envelope pulse response, typical

DC gain accuracy ± 2%, derated at 0.025%/°C for temperatures below +18 °C and above

DC measurement accuracy

Sample acquisition mode, typical

n Average acquisition mode (≥16 averages)

Offset range Scale range Offset range

ranges

0.02 term (gain component) derated at 0.00025/˚C above 30 ˚C

Selectable between 20 MHz, 150 MHz (not available on TDS301xB), or Full

7Hzfor1MΩ, reduced by a factor of ten when usi ng a 10X passive probe; 140 kHz for 50 Ω

Minimum width of pulse with amplitude of ≥2 div to capt ure 50% or greater amplitude

Sample rates ≤125 MS/s

1ns 1/sample rate

+30 °C, in Sample or Average acquisition mode

Measurement type DC Accuracy (in volts)

Absolute measurement of any waveform point

Delta voltage between any two points on a waveform

Absolute measurement of any waveform point

Delta voltage between two points on a waveform

1mV/divto9.95mV/div ±100 mV

10 mV/div to 99.5 mV/div ±1V

100 mV/div to 995 mV/div ±10 V

1V/div to 10 V/div ±100 V

Note: Convert both theconstant o multiplying by the volts/div setting

Sample rates ≥250 MS/s

± [0.022¢ | reading -- (offset --

position) | + offset accuracy +

0.15 div + 0.6 mV]

± [0.022¢ | reading | + 0.15 div +1.2mV]

± [0.022¢ | reading -- (offset -position) | + offset accuracy +0.1div]

± [0.022¢ | reading | + 0.05 div]

setand position terms tovolts b

1- 4

TDS3000B Series Service Manual

Table 1- 1: Specifications (cont.)

fms/

Maximum

700wfms/s

3,600wfms/s

ggg

Horizontal

Acquisition (horizontal) resolution

imum 700

acq rate, typical

Normal

(10,000 point record)

Specifications

Fast trigger

(500 point record)

s 3,600 wfms/s

Sample rate range TDS301xB TDS302xB,

TDS303xB

Normal

Fast trigger

Seconds/division

range

n Sample rate and

100 S/s to

1.25 GS/s

5 S/s to

1.25 GS/s

4 ns/div to 10 s/div

±20 ppm over any ≥1 ms time interval

100 S/s to

2.5 GS/s

5 S/s to

2.5 GS/s

2 ns/div to 10 s/div

TDS304xB-TDS306xB

100 S/s to 5 GS/s

5 S/s to 5 GS/s

1 ns/div to 10 s/div

delay time accuracy

Trigger

External trigger input, typical

TDS30x2B: 1MΩ in parallel with 17 pF, TekProbe compatible

TDS30x4B: 1MΩ in parallel with 52 pF, not TekProbe compatible

External trigger Overvoltage category Maximum voltage maximum voltage

CAT I Environment

150 V

RMS

(400 Vpk)

(refer to page 1--11)

CAT II Environment

100 V

RMS

(400 Vpk)

(refer to page 1--11)

For steady-state sinusoidal waveforms, derate at 20 dB/decade above

External trigger maxi-

200 kHz to 13 V

0 V from chassis (BNC) ground to earth ground

at 3 MHz and above

mum floating voltage

30 V >30 V

(42 Vpk) only under these conditions: no signal voltages

RMS

(>42 Vpk), all common leads connected to the same voltage,

RMS

no grounded peripherals attached

n Edge trigger Source Sensitivity sensitivity

Any channel, DC coupled ≤0.6 div from DC to 50 MHz,

increasing to 1 div at oscilloscope bandwidth

Edge trigger Source Sensitivity sensitivity, typical

External trigger 200 mV from DC to 50 MHz,

increasing to 750 mV at 300 MHz

External/10 trigger 500 mV from DC to 50 MHz,

increasing to 3 V at 300 MHz

TDS3000B Series Service Manual

1- 5

Specifications

ggg

Table 1- 1: Specifications (cont.)

Trigger

Any channel, NOISE REJ coupled 3.5 times the DC-coupled limits

Any channel, HF REJ coupled 1.5 times the DC-coupled limit

from DC to 30 kHz, attenuates signals above 30 kHz

Any channel, LF REJ coupled 1.5 times the DC-coupled limits

for frequencies above 80 kHz, attenuates signals below 80 kHz

Trigger level range Source Sensitivity

Any channel ±8 divisions from center of

screen, ±8 divisions from 0 V if LF REJ trigger coupled

External trigger ±800 mV

External/10 trigger ±8V

Line Fixed at the midlevel of the AC

line

SET LEVEL TO 50%, typical

Trigger level Source Sensitivity accuracy, typical

Trigger holdoff range 250.8 ns to 10 s

Video trigger Triggers on negative sync of NTSC, PAL, or SECAM signal sensitivity, typical

Operates with input signals ≥45 Hz

Any channel ±0.2 divisions

External trigger ±20 mV

External/10 trigger ±200 mV

Line N/A

Source Sensitivity

Any channel 0.6 to 2.5 divisions of video sync

tip

External trigger 150 mV to 625 mV of video sync

tip

External/10 trigger 1.5 V to 6.25 V of video sync tip

1- 6

TDS3000B Series Service Manual

Specifications

Table 1- 1: Specifications (cont.)

Trigger

B Trigger Trigger After Time Trigger After B Events

Range 13.2 ns to 50 s 1 event to 9,999,999 events

Minimum time between arm and trigger, typical

Minimum Pulse Width, typical

Maximum Frequency, typical

Display

Display screen 6.5 in (165 mm) diagonal color liquid crystal

Display resolution 640 horizontal by 480 vertical pixels

Backlight intensity, typical

Display color Up to 16 colors, fixed palette

External display filter Scratch-resistant tempered glass

I/O ports

Ethernet port RJ-45 female connector 10BaseT

Parallel printer port DB-25 female connector, Centronics compatible

GPIB interface Available with optional accessory TDS3GV

RS-232 interface DB-9 male connector, available with optional accessory TDS3GV

VGA signal output DB-15 female connector, 31.6 kHz sync rate, EIA RS-343A compliant,

Probe compensator output, typical

Miscellaneous

Nonvolatile memory Typical retention time ≥ 5 years for front-panel setti ngs, unlimited for

Floppy disk 3.5 in, DOS format, 720 KB or 1.44 MB compatible

Internal clock Provides date/time stamp for stored data and the current time and date

5ns from the end of the time period and the B trigger event

— B event width, 2 ns

— B event frequency, 250 MHz

200 cd/m

available with optional accessory TDS3GV

5.0 V into ≥1MΩ load, frequency = 1 kHz

saved waveforms and setups

to the display, if enabled

5 ns between the A trigger event and the first B trigger event

TDS3000B Series Service Manual

1- 7

Specifications

Table 1- 1: Specifications (cont.)

Power sources

AC line power Operates the oscilloscope and charges the optional i nternal battery

Source voltage 90 V

Source frequency 47 Hz to 440 Hz

Power consump-

75 W maximum

tion

Battery power Optional accessory TDS3BATB, rechargeable battery pack

Operating time,

3 hours, depending on operating conditions

typical

Battery charge time, typical

30 hours in the oscilloscope, 5 hours using the optional external charger TDS3CHG

Line fuse Internal, not user replaceable

Environmental

Temperature Operating range (no disk installed): +5 °Cto+50°C

RMS

to 250 V

, continuous range

RMS

Nonoperating range (no disk installed): --20 °Cto+60°C

Typical operating range for floppy disks: +10 °Cto+50°C

Humidity Operating range (no disk installed): 20% to 80% RH below 32 °C,

derate upper limit to 21% RH at 50 °C

Nonoperating range (no disk installed): 5% to 90% RH below 41 °C, derate upper limit to 30% RH at 60 °C

Typical operating range for floppy disks: 20% to 80% RH below 32 °C, derate upper limit to 21% RH at 50 °C

Pollution Degree Pollution Degree 2: Typical home or office environment.

1- 8

TDS3000B Series Service Manual

Table 1- 1: Specifications (cont.)

Environmental

Altitude Operating limit: 3000 m

Nonoperating limit: 15,000 m

Random vibration Operating: 0.31 g

Nonoperating: 2.46 g axis

Drop resistance, typical

Survives a 152 mm (6 in) drop onto concrete with only cosmetic damage

Mechanical

Size Height: 176 mm (6.9 in), 229 mm (9.0 in) including handle

Width: 375 mm (14.75 in)

Depth: 149 mm (5.9 in)

Weight Oscilloscope only: 3.2 kg (7.0 lbs)

from 5 Hz to 500 Hz, 10 minutes on each axis

RMS

from 5 Hz to 500 Hz, 10 minutes on each

RMS

Specifications

With accessories and carry case: 4.1 kg (9.0 lbs)

When packaged for domestic shipment: 5.5 kg (12.0 lbs)

Optional TDS3BATB battery pack: 0.85 kg (1.9 lbs)

TDS3000B Series Service Manual

1- 9

Specifications

Table 1- 1: Specifications (cont.)

EMC certifications and compliances

EMC Compliance: European Union

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

To ensure compliance to the standards listed above, attach only high quality shielded cables to this instrument. High quality shielded cables typically are braid and foil types that have low impedance connections to shielded connectors at both ends.

The increase in trace noise while subjected to a test field (3 V/m over the frequency range 80 MHz to 1 GHz, with 80% amplitude modulation at 1 kHz) is not to exceed 8 major divisions peak-to-peak. Ambient conducted fields may induce triggering when the trigger threshold is offset less than 4 major divisions from ground reference.

The increase in trace noise while subjected to a test field (3 V/m over the frequency range 150 kHz to 80 MHz, with 80% amplitude modulation at 1 kHz) is not to exceed 2 major divisions peak-to-peak. Ambient conducted fields m ay induce triggering when the trigger threshold is offset less than 1 major division from ground reference.

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

EN 61326

EMC requirements for Class A electrical equipment for measurement, control, and laboratory use

1,2

IEC 61000-4-2

Electrostatic discharge immunity (Performance criterion B)

IEC 61000-4-3

RF electromagnetic field immunity (Performance criterion B)

IEC 61000-4-4

Electrical fast transient/burst immunity (Performance criterion B)

IEC 61000-4-5

Power line surge immunity (Performance criterion B)

IEC 61000-4-6

Conducted RF immunity (Performance criterion B)

IEC 61000-4-11

Voltage dips and interruptions immunity (Performance criterion B)

EN 61000-3-2

AC power line harmonic emissions

EN 61000-3-3

Voltage changes, fluctuations and flicker

1- 10

TDS3000B Series Service Manual

Specifications

Table 1- 1: Specifications (cont.)

EMC certifications and compliances

EMC Compliance: Australia/New Zealand

EMC Compliance: Russia

FCC Compliance: U.S.A.

Safety certifications and compliances

EC Declaration of Conformity -- Low Voltage

(TDS3000B Series, P3010, and P6139A)

(P3010 and P6139A) EN 61010-2-031:1995

Approvals

(TDS3000B Series, P3010, and P6139A)

(P3010 and P6139A) EN 61010-2-031:1995 -- Particular requirements for hand-held probe

Installation/ Overvoltage Category Descriptions

Meets the intent of Australian EMC Framework as demonstrated to the following specification:

AS/NZS 2064.1/2

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

Emissions comply with FCC Code of Federal Regulations 47, Part 15, Subpart B, Class A Limits

Compliance was demonstrated to the following speci fication as listed in the Official Journal of the European Communities: Low Voltage Directive 73/23/EEC as ammended by 93/68/EEC

EN 61010-1/A2:1995

Safety requirements for electrical equipment for measurement, control, and laboratory use

Particular requirements for hand-held probe assemblies for electrical measurement and test equipment

UL3111-1 -- Standard for electrical measuring and test equipment CAN/CSA C22.2 No. 1010.1 -- Safety requirements for electrical equipment for measurement, control and laboratory use

assemblies for electrical measurement and test equipment

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

CAT III Distribution-level mains (usually permanently

connected). Equipment at this level is typically in a fixed industrial location

CAT II Local-level mains (wall sockets ). Equipment at this

level includes appliances, portable tools, and similar products. Equipment is usually cord-connected

CAT I Secondary (signal level) or battery operated circuits of

electronic equipment

TDS3000B Series Service Manual

1- 11

Specifications

1- 12

TDS3000B Series Service Manual

Operating Information

This chapter provides an overview of the following topics:

H Connecting power and using the battery pack

H Installing an application module

H Installing a communication module

H Front-panel menus and controls

H Front- and rear-panel connectors

H Probe compensation

H Self calibration

H Transporting the oscilloscope

For more detailed information about operating information, see the TDS3000B Series Digital Phosphor Oscilloscope User Manual.

For information about unpacking and inspecting the instrument, see Unpacking and Repacking Instructions on page 6--43 of this manual.

TDS3000B Series Service Manual

2- 1

Operating Information

Connecting Power

To connect a power cord, do these steps:

1. Open the strain relief clip and slip it onto the power cord.

2. Snap the strain relief into its hole in the rear panel of the oscilloscope.

3. Connect the power cord to the power input connector.

You can operate the oscilloscope from a grounded mains supply with line voltage between 90 V oscilloscope is grounded through the power cord. The line fuse is internal and is not user replaceable.

and 250 VACand frequency between 47 Hz and 440 Hz. The

Using Battery Power

2- 2

You can operate the oscilloscope continuously for up to three hours from the TDS3BATB rechargeable battery pack. A triangle icon in the display ( when the battery is in use, a power-plug icon ( connected, and a gauge icon ( The oscilloscope turns off automatically when the battery runs low.

Refer to the General Safety Summary for information about proper rechargeable battery disposal.

) shows the relative charge level in the battery.

) shows when line power is

TDS3000B Series Service Manual

) shows

Operating Safely with

Battery Power

Operating Information

WARNING. To avoid electric shock, always connect the rear-panel ground terminal to earth ground when operating the instrument from battery power.

For safe operation, the oscilloscope chassis must remain at earth ground potential even when operating from battery power. Without a connection between the chassis and earth ground, you can receive a shock from exposed metal on the chassis if you connect an input to a hazardous voltage (>30 V

, >42 Vpk). T o

RMS

protect against this condition, attach the Tektronix-supplied grounding wire from the terminal on the rear panel to earth ground. If you use a different grounding wire, it must be larger than 18 gauge (1 mm2).

When you start to use the battery pack, an on-screen message reminds you to connect the grounding wire between the ground terminal on the rear panel and earth ground.

TDS3000B Series Service Manual

2- 3

Operating Information

Installing and Removing

the Battery

To install the optional battery pack, do these steps:

1. Open the battery compartment door on the rear panel and remove the

accessory tray.

Battery door

2. Slide the battery into the compartment and press it in from both sides until

you hear the latches click.

3. Press on both sides of the battery compartment door to snap it closed.

2- 4

TDS3000B Series Service Manual

Operating Information

To remove the battery, do these steps:

1. Open the battery compartment door.

2. Lift the battery handles and pull the battery out of the oscilloscope.

TDS3000B Series Service Manual

2- 5

Operating Information

Charging the Battery

The battery charges automatically when the oscilloscope is connected to line power. You can also charge the battery with the optional external charger (TDS3CHG).

Configuration Typical charging time

Battery charging in oscilloscope with oscilloscope turned on or off

Battery charging with TDS3CHG external charger

30 hours

5 hours

NOTE. Charge the battery before using it for the first time or after prolonged storage.

2- 6

TDS3000B Series Service Manual

Installing an Application Module

CAUTION. To avoid damage to the oscilloscope or application module, observe the ESD precautions described on page ix.

Optional application packages are available to extend the capability of your oscilloscope. You can install up to four application modules at one time. Application modules can go into the two slots with windows in the upper right corner of the front panel. Two additional slots are directly behind the two you can see.

Operating Information

Application

modules

Contacts

Refer to the TDS3000 & TDS3000B Series Application Module Installation Instructions that came with your application module for instructions on installing

and testing an application module.

NOTE. If you remove an application module, the functions provided by the application module become unavailable. You can reinstall the module to restore the functions.

TDS3000B Series Service Manual

2- 7

Operating Information

Installing a Communication Module

CAUTION. To avoid damage to the oscilloscope or communication module, observe the ESD precautions described on page ix.

To install the optional communication module, do these steps:

1. Turn the oscilloscope power off.

2. Press down on the latching tab to remove the blank cover.

3. Slide the communication module into the compartment until the internal

connectors are seated and the latching tab locks.

4. Turn power on. The communication module is now ready for your use.

To remove a communication module, do these steps:

1. Turn the oscilloscope power off.

2. Press down on the latching tab and then use a small screwdriver to alternate-

ly pry out the sides of the communication module.

3. Slide out the communication module and store it in an ESD-shielded bag.

Install the blank cover if no other communication module is to be installed.

Latching tab

2- 8

TDS3000B Series Service Manual

Front-Panel Menus and Controls

The front panel has buttons and controls for the functions you use most often. The front panel has menus to access more specialized functions.

Operating Information

Using the Menu System

To use the menu system, follow the steps shown on the next two pages.

1. Push a dark-colored front-panel menu button to display the menu you want

to use.

MEASURE SAVE/RECALL QUICKMENU

UTILITYDISPLAYCURSOR

VERTICAL HORIZONTAL TRIGGER ACQUIRE

2. Push a bottom screen button to select a menu item. If a pop-up menu

appears, continue to push the screen button to select an item from the pop-up menu.

TDS3000B Series Service Manual

2- 9

Operating Information

3. Push a side screen button to choose a menu item. If the menu item contains

more than one choice, push the side screen button again to make the choice.

4. Certain menu choices require you to set a numerical value to complete the

setup. Use the general purpose knob to adjust the parameter value. Push the COARSE button to make larger adjustments.

SELECT

COARSE

VERTICAL

POSITION

2- 10

TDS3000B Series Service Manual

Operating Information

Using the Menu Buttons

You can use the menu buttons to perform many functions in the oscilloscope.

MEASURE SAVE/RECALL QUICKMENUSELECT

COARSE

UTILITYDISPLAYCURSOR

21 4365

1. MEASURE. Performs automated measurements of waveforms.

2. CURSOR. Activates the cursors.

3. SAVE/RECALL. Saves and recalls setups and waveforms to memory or a

floppy disk.

4. DISPLAY. Changes the appearance of waveforms and the display screen.

5. QUICKMENU. Activates QuickMenus such as the built-in Quick Scope

feature.

6. UTILITY. Activates the system utility functions, such as selecting a

language.

VERTICAL HORIZONTAL TRIGGER ACQUIRE

POSITION POSI TION LEVEL

SCALE SCALE

WAVEFORM

INTENSITY

987

TDS3000B Series Service Manual

2- 11

Operating Information

7. Vertical MENU. Adjusts the scale, position, and offset of waveforms. Sets

the input parameters.

8. Trigger MENU. Adjusts the trigger functions.

9. Acquire MENU. Sets the acquisition modes and horizontal resolution, resets

the delay time, and accesses the WaveAlertt menu.

Using the Dedicated

Controls

These dedicated buttons and controls generally control waveforms and cursors without the use of menus.

34 5 6

SELECT MEASURE SAVE/RECALL QUICKMENU

COARSE UTILITYDISPLAYCURSOR

VERTICAL HORIZONTAL TRIGGER ACQUIRE

POSITION POSI TION LEVEL

SCALE SCALE

WAVEFORM

INTENSITY

8 9

12 13

2- 12

14151618 17

1. COARSE. Causes the general purpose knob and position knobs to make

adjustments more quickly.

2. SELECT. Toggles between the two cursors to select the active cursor.

3. General purpose knob. Moves the cursors. Sets numerical parameter values

for some menu items. Push COAR SE to make adjustments quickly.

4. Vertical POSITION. Adjusts the vertical position of the selected waveform.

Push COARSE to make adjustments more quickly.

5. Horizontal POSITION. Adjusts the trigger point location relative to the

acquired waveforms. Push COARSE to make adjustments quickly.

TDS3000B Series Service Manual

Operating Information

6. Trigger LEVEL. Adjusts the trigger level.

7. RUN/STOP. Stops and restarts acquisition.

8. SINGLE SEQ. Sets acquisition, display, and trigger parameters for a

single-shot (single-sequence) acquisition.

9. SET TO 50%. Sets the trigger level to the midpoint of the waveform.

10. AUTOSET. Automatically sets the vertical, horizontal, and trigger controls

for a usable display.

11. FORCE TRIG. Forces an immediate trigger event.

12. WAVEFOR M INTENSITY. Controls waveform intensity.

13. B TRIG. Activates the B trigger. Changes the trigger menu to set the

B-trigger parameters.

14. DELAY. Enables delayed acquisition relative to the trigger event. Use

horizontal POSITION to set the amount of delay.

15. Horizontal SCALE. Adjusts the horizontal scale factor.

16. Horizontal zoom. Splits the screen and magnifies the current acquisition

horizontally.

17. Waveform OFF. Removes the selected waveform from the display.

18. Vertical SCALE. Adjusts the vertical scale factor of the selected waveform.

19. CH1, CH2, (CH3, CH4,) MATH. Displays a waveform and chooses the

selected waveform. REF shows the reference waveform menu.

TDS3000B Series Service Manual

2- 13

Operating Information

20 2321 22

20. Hard copy. Initiates a hard copy using the port selected in the Utility menu.

21. Power switch. Turns power to on or standby.

22. Wrist-strap ground. Use to connect a wrist strap when working with

ESD-sensitive circuits. This connector is not a safety ground.

23. MENU OFF. Clears menu from the display.

2- 14

TDS3000B Series Service Manual

Operating Information

Identifying Items in the

Display

The following items may appear in the display; not all items are visible at any given time. Some readouts move outside the graticule area when menus are turned off.

2 3 4 5

1. Waveform baseline icons show the zero-volt level of the waveforms

(ignoring the effect of offset). The icon colors correspond to the waveform colors.

2. Acquisition readout shows when acquisition is running, stopped, or when

acquisition preview is in effect.

3. Trigger position icon shows the trigger location in the waveforms.

4. Expansion point icon shows the point that the horizontal scale expands and

compresses around.

5. Waveform record icon shows the trigger location relative to the waveform

record. The line color corresponds to the selected waveform color.

6. Trigger status readout shows trigger status.

7. Trigger level icon shows the trigger level on the waveform. The icon color

corresponds to the trigger source channel color.

8. Cursor and measurement readouts show results and messages.

9. Trigger readouts show the trigger sources, slopes, and levels, and position.

10. Readout shows the delay setting or the trigger location within the record.

11. Horizontal readout shows the main or zoom time/division.

TDS3000B Series Service Manual

2- 15

Operating Information

12. Auxiliary waveform readouts show the vertical and horizontal scale factors

of the math or reference waveforms.

13. Channel readouts show the channel scale factor, coupling, input resistance,

bandwidth limit, and invert status.

14 15

14. A triangle icon with the battery icon indicates that a battery is installed and

battery power is in use. The battery icon shows the approximate charge level of the battery. See page 2--3 for important safety information.

15. A power-plug icon with the battery icon indicates that a battery is installed

but line power is in use. The battery may be charging. The battery icon shows the approximate charge level.

Using Quick Menus

The QuickMenu feature simplifies the use of the oscilloscope. When you push the QUICKMENU button, a set of frequently used menu functions show on the display. Then, push the screen buttons around the display to operate the QuickMenu.

Using Quick Scope. Quick Scope is one type of QuickMenu that you can use to control the basic oscilloscope functions. You can perform many tasks without using the regular menu system. If you need to use a function that is not contained in the Quick Scope menu, push the button you would normally push to access that function. For example, if you want to add an automatic measurement, push the MEASURE button to set up the measurement. Then, push the QUICKMENU button to return to the Quick Scope menu with the measurement also in the display.

2- 16

TDS3000B Series Service Manual

Operating Information

1 2

5 437

1. Edge Trigger controls. Push these screen buttons to set trigger parameters for

edge trigger.

2. Trigger controls if either B trigger or video trigger is selected.

3. Cursor control. Push this screen button to turn on cursors and select the

cursor type. Push the SELECT button to toggle between the two cursors to select the active cursor. Use the general purpose knob to move the active cursor.

4. Acquisition controls. Push these screen buttons to set acquisition parameters.

5. Channel vertical controls. Push these screen buttons to set vertical controls

for the selected channel. Use the CH1, CH2, CH3, CH4, MATH, and REF buttons to select the channel you want to control.

6. Vertical controls if either the math waveform or a reference waveform is

selected.

7. Menu. Push this screen button to select a specific QuickMenu display if

more than one is available.

NOTE. Items in the Quick Scope display not mentioned above are also contained in the regular display. Those items are described on page 2--15.

Other QuickMenus. Some optional application packages include a custom QuickMenu display. Those QuickMenus contain specific features that are important for the application.

TDS3000B Series Service Manual

2- 17

Operating Information

Front-Panel Connectors

1MΩ, 13pF ≤150 VRMS CATl

CH 2CH 1

PROBECOMP

≈ 5V 

1MΩ, 13pF ≤150 VRMS CATl

CH 4CH 3

50Ω

≤5VRMS

50Ω

≤5VRMS

1MΩ, 13pF ≤150 VRMS CATl

CH 2CH 1

50Ω

≤5VRMS

PROBECOMP

≈ 5V 

1MΩ, 17pF ≤150 VRMS CATl

EXT TRIG

1. PROBE COMP. Square wave signal source to compensate probes.

2. CH1, CH 2, (CH3, CH4). Channel inputs with TekProbe interface.

3. EXT TRIG. External trigger input with TekProbe interface (two-channel

models only). Four-channel models have an external trigger input on the rear of the oscilloscope.

2- 18

TDS3000B Series Service Manual

Rear-Panel Connectors

Operating Information

5 6

+14.2 V DC ≤400 mA

1. Power input. Attach to an AC power line with integral safety ground.

2. Parallel printer port. Connect to a printer to make hard copies.

3. Communication Module compartment. Install optional communication

modules or the thermal printer.

4. Ethernet port. Connects the oscilloscope to a 10BaseT local area network.

5. External Trigger input (four-channel models only). See the Specifications

appendix for external trigger signal requirements.

6. DC power output. Provides ~15 V DC power to accessories or to the plug-in

TDS3PRT thermal printer.

7. Ground terminal. Connect to earth ground when using battery power. See

page 2--3 for important safety information.

8. CAL switch. For use by authorized service personnel only.

TDS3000B Series Service Manual

2- 19

Operating Information

Communication Module Connectors

TDS3GV

1. GPIB port. Connect to a controller for remote programmability.

2. RS-232 port. Connect to a controller or terminal for remote programmability

or printing.

3. VGA port. Connect to a VGA monitor to display the screen image.

2- 20

TDS3000B Series Service Manual

Probe Compensation

Operating Information

Perform this adjustment to match your probe to the input channel. This should be done whenever you attach a passive probe for the first time to any input channel.

1. Connect the oscilloscope probe to channel 1. Attach the probe tip and reference lead to the

PROBE COMP connectors, then push AUTOSET.

If using the probe hook-tip, ensure a proper connection by firmly twisting the tip onto the probe.

2. Check the shape of the displayed waveform.

3. If necessary, adjust your probe.

Repeat as necessary.

PROBE COMP

CH 1

Overcompensated

Undercompensated

Compensated correctly

P3010 P6139A

UTOSET

button

TDS3000B Series Service Manual

2- 21

Operating Information

Self Calibration

The self calibration routine lets you quickly optimize the oscilloscope signal path for maximum measurement accuracy. You can run the routine anytime but you should always run the routine if the ambient temperature changes by 10_ Cor more.

To compensate the signal path, do the following steps:

1. Disconnect any probes or cables from the channel input connectors.

2. Push the UTILITY button.

3. Push the System screen button to select Cal.

4. Push the Signal Path screen button.

5. Push OK Compensate Signal Path. This procedure takes several minutes to

complete.

NOTE. The signal path compensation does not include calibration to the probe tip.

2- 22

TDS3000B Series Service Manual

Transporting the Oscilloscope

When transporting the oscilloscope, wrap the cord around the handle as shown below. Use the supplied cord retainer if the power plug does not have a molded-in retainer. The oscilloscope front cover has a convenient place to store TDS3000B Series 1/4-size user and reference manuals.

Operating Information

If you are not using a battery, you can use the accessory tray in the battery compartment to store probes and other accessories.

CAUTION. To avoid damage to the disk drive, do not transport the oscilloscope with a floppy disk in the disk drive.

TDS3000B Series Service Manual

2- 23

Operating Information

2- 24

TDS3000B Series Service Manual

Theory of Operation

This chapter describes the electrical operation of the oscilloscope to the module level. Figure 3--1 shows the oscilloscope module interconnections.

Battery

pack

Display

back light

inverter

power

LCD

Display

Parallel printer

connector

J180

Battery bd

J170

J400

power

J150

J120

J100

J200

J700

Ethernet

connector

AC Line

Power supply

Fan

15 VDC

external device

connector

Figure 3- 1: TDS3000B series block diagram

Power Supply

J910

J900

Ch 1

J500 J810

Attenuator circuit

Ch 2

J860

Comm. module

connector

Main board

Ch 3

J700

J800

Ch 4

EXT

Front

panel

Floppy

Disk Drive

4-channel oscilloscopes

EXT

2-channel oscilloscopes

Input ports for application modules

The power supply converts AC line voltage to 15 VDC to power all internal circuits and an external power connector. It also supplies power to charge the optional battery pack.

TDS3000B Series Service Manual

3- 1

Theory of Operation

Battery Board

The battery board provides the following functions:

H Interfaces to the optional battery pack (powers the oscilloscope from the

battery pack or charges the battery pack when the oscilloscope is connected to AC line).

H Turns on DC power to the oscilloscope.

H Converts 15 VDC from the power supply to 5 VDC for the main and front

panel boards and ±15 VDC for probe power.

H Powers the cooling fan.

H Provides 15 VDC to the external power connector for powering external

devices.

H Provides power to the display back light inverter board.

H Provides an Ethernet 10BaseT connector to connect the oscilloscope to a

network.

Main Board

Acquisition System

Trigger System

Display System

The Main Board module contains the following functions.

The acquisition system begins with the analog signal path and ends with a digitized signal in memory. The signal enters a channel input and then passes through an attenuator and preamplifier. The analog signal from each preamplifier goes through a sampler and digitizer, a time base controller, and then into acquisition memory. The analog signal from each preamplifier is also distributed to a trigger circuit.

The trigger system processes the analog signals from the preamplifiers and sends trigger information to the time base controller. Advanced trigger functions are enabled only when the appropriate application modules and supporting software is installed.

The display system combines live waveform data from acquisition memory with menus and text and stores this information in display memory. It then uses this data to refresh the VGA display module (LCD).

3- 2

TDS3000B Series Service Manual

Theory of Operation

Processor System

Power Converter

Display Module

Front-Panel Board

The processor system contains a MPC680DC P ower PC microprocessor that controls the entire instrument. The processor system also contains FLASH ROM, system RAM, and interfaces to communication modules, the parallel printer port, and the floppy disk drive.

The power converter receives 15 VDC (or battery voltage) from the battery board and generates voltages for the analog and digital circuitry on the main board.

The display module consists of a color liquid crystal display (LCD), a display driver, a pair of fluorescent back light tubes, and a high-voltage back light power supply.

The front-panel board contains a microprocessor that reads the front-panel buttons and controls and then sends this information to the processor system. The front-panel board also generates the probe compensation output signal and provides an interface to the application modules.

Disk Drive

The disk drive module consists of a 3.5 inch, IBM format, floppy disk drive. The disk drive is controlled by circuitry on the Main Board.

TDS3000B Series Service Manual

3- 3

Theory of Operation

3- 4

TDS3000B Series Service Manual

Performance Verification

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

Description

DC Voltage Source 3mVto4V,±0.1% accuracy Wavetek 9500

Leveled Sine Wave Generator 50 kHz to 600 MHz, ±4%

Time Mark Generator 10 ms period, ±5 ppm accu-

Minimum requirements

amplitude accuracy

racy

Examples

Oscilloscope Calibratorwith two 9510 Output Modules

50 Ω feedthrough termination

BNC connectors Tektronix part number

011-0099-00

You may need additional cables and adapters, depending on the actual test equipment you use.

These procedures cover all TDS3000B oscilloscope models. Please disregard checks that do not apply to the specific model you are testing.

Photocopy the test record on the next two pages and use them to record the performance test results for your oscilloscope.

NOTE. Successful completion of the performance verification procedure does not update the instrument Calibration Due date and time.

Successful completion of the Adjustment Procedure in Section 5 does automatically update the instrument Calibration Due date and time.

TDS3000B Series Service Manual

4- 1

Performance Verification

accurac

Test Record

Serial number

Procedure performed by Date

Test Passed Failed

Self Test

Performance checks Low limit Test result High limit

Channel 1 DC measurement

ccurac

1mV/div 99.25 mV 100.8 mV

2mV/div --7.540 mV --6.460 mV

5mV/div --101.8 mV --98.24 mV

Channel 2 DC measurement

ccurac

50 mV/div 982.4 mV 1.018 V

50 mV/div 632.4 mV 667.6 mV

50 mV delta 340.5 mV 359.5 mV

90 mV/div --339.3 mV --290.7 mV

200 mV/div 9.900 V 10.10 V

1V/div --10.30 V --9.698 V

1mV/div 99.25 mV 100.8 mV

2mV/div --7.540 mV --6.460 mV

5mV/div --101.8 mV --98.24 mV

50 mV/div 982.4 mV 1.018 V

50 mV/div 632.4 mV 667.6 mV

50 mV delta 340.5 mV 359.5 mV

90 mV/div --339.3 mV --290.7 mV

200 mV/div 9.900 V 10.10 V

1V/div --10.30 V --9.698 V

4- 2

TDS3000B Series Service Manual

Performance checks High limitTest resultLow limit

accurac

tri

itivity

tri

itivity

tri

itivity

tri

itivity

Channel 3 DC measurement

ccurac

1mV/div 99.25 mV 100.8 mV

2mV/div --7.540 mV --6.460 mV

5mV/div --101.8 mV --98.24 mV

50 mV/div 982.4 mV 1.018 V

50 mV/div 632.4 mV 667.6 mV

50 mV delta 340.5 mV 359.5 mV

90 mV/div --339.3 mV --290.7 mV

200 mV/div 9.900 V 10.10 V

1V/div --10.30 V --9.698 V

Performance Verification

Channel 4 DC measurement

ccurac

1mV/div 99.25 mV 100.8 mV

2mV/div --7.540 mV --6.460 mV

5mV/div --101.8 mV --98.24 mV

50 mV/div 982.4 mV 1.018 V

50 mV/div 632.4 mV 667.6 mV

50 mV delta 340.5 mV 359.5 mV

90 mV/div --339.3 mV --290.7 mV

200 mV/div 9.900 V 10.10 V

1V/div --10.30 V --9.698 V

Channel 1 bandwidth 425 mV —

Channel 2 bandwidth 425 mV —

Channel 3 bandwidth 425 mV —

Channel 4 bandwidth 425 mV —

Channel 1

rising slope stable trigger —

gger sens

at BW

Channel 2

falling slope

rising slope stable trigger —

stable trigger —

gger sens

at BW

falling slope

stable trigger —

Channel 3

rising slope stable trigger —

gger sens

at BW

Channel 4

falling slope

rising slope stable trigger —

stable trigger —

gger sens

at BW

TDS3000B Series Service Manual

falling slope stable trigger —

4- 3

Performance Verification

tri

itivity

tri

itivity

tri

itivity

tri

itivity

Performance checks High limitTest resultLow limit

Channel 1

gger sens

at 50 MHz

rising slope stable trigger —

falling slope

stable trigger —

Channel 2

gger sens

at 50 MHz

Channel 3

gger sens

at 50 MHz

Channel 4

gger sens

at 50 MHz

Sample rate and delay time accuracy -- 2 divisions +2 divisions

rising slope stable trigger —

falling slope

rising slope stable trigger —

falling slope

rising slope stable trigger —

falling slope

stable trigger —

4- 4

TDS3000B Series Service Manual

Performance Verification Procedures

The following three conditions must be met prior to doing these procedures:

1. The oscilloscope must have been operating continuously for twenty (20)

minutes in an environment the meets the operating range specifications for temperature and humidity.

2. You must perform the Compensate Signal Path operation described on

page 2--22. If the operating temperature changes by more than 10° C, you must perform the Compensate Signal Path operation again.

3. You must connect the oscilloscope and the test equipment to the same AC

power circuit. Connect the oscilloscope and test instruments into a common power strip if you are unsure of the AC power circuit distribution. C onnecting the oscilloscope and test instruments into separate AC power circuits can result in offset voltages between the equipment, which can invalidate the performance verification procedure.

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

Performance Verification

Self Test

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

This procedure uses internal routines to verify that the oscilloscope functions and passes its internal self tests. No test equipment or hookups are required. Start the self test with these steps:

1. Disconnect all probes and cables from the oscilloscope inputs.

2. Push the UTILITY menu button.

3. Push the System screen button to select Diags.

4. Push the Loop screen button and choose Once.

5. Push the Execute screen button.

6. Push the OK Confirm Run Test screen button.

A dialog box displays the result when the self test completes. Push the MENU OFF screen button to continue operation.

TDS3000B Series Service Manual

4- 5

Performance Verification

Check DC Voltage

Measurement Accuracy

This test checks the DC voltage measurement accuracy in the average acquisition mode.

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

2. Connect the DC voltage source to the oscilloscope channel 1 input as shown below. Push the channel 1 selection button (CH 1).

DC voltage

source

Oscilloscope

Ch 1

3. Push the SAVE/RECALL menu button.

4. Push the Recall Factory Setup screen button and then push the OK Confirm Factory Init screen button.

5. Push the acquire MENU button.

6. Push the Mode screen button and then push the Average screen button.

7. Adjust the number of averages to 16 with the general purpose knob.

8. Go to step 11.

9. Move the DC voltage source output cable to the oscilloscope channel you

want to check.

10. Push the channel button (CH 1, CH 2, CH 3,orCH 4) for the channel you want to check.

11. Push the MEASURE menu button.

12. Push the Select Measurement screen button.

13. Push the -- m o r e -- screen button until you can select the Mean measure-

ment.

14. Push the vertical MENU button.

4- 6

TDS3000B Series Service Manual

Performance Verification

Vertical SCALE setting

1mV/div Off 20 MHz 96.5 mV 100 mV 99.25 mV 100.8 mV

2mV/div Off 20 MHz 0.0 V -- 7 m V --7.540 mV --6.460 mV

5mV/div Off 20 MHz --82.5 mV --100 mV --101.8 mV --98.24 mV

50 mV/div Off Full 825 mV

50 mV

delta

90 mV/div

200 mV/div Off 150 MHz

1V/div On

Set the vertical offset to 0 V before adjusting the vertical offset to 825 mV.

Refer to step 15e on page 4--7 to calculate 50 mV delta measurement.

Push the Vertical MENU button, push the Fine Scale screen button, then use the general purpose knob to adjust the setting to

Invert setting

Off Full 0.0 V --315 mV --339.3 mV --290.7 mV

Bandwidth limit setting Offset

150 MHz

9.3 V 10 V 9.900 V 10.10 V

-- 6 . 5 V 10 V --10.30 V --9.698 V

Input voltage

1.0 V 982.4 mV 1.018 V

650 mV 632.4 mV 667.6 mV

Low limit

340.5 mV 359.5 mV

High limit

90 mV/div.

Use the Full bandwidth setting on the TDS3012B or TDS3014B oscilloscopes.

Make sure to turn Invert setting to On for this measurement.

15. For each row of the table, do these steps:

a. Set the vertical SCALE control to the setting in the table.

b. Set the Invert and Bandwidth Limit controls to the settings in the table.

c. Set the output of the DC voltage source to the voltage level in the table.

d. Verify that the oscilloscope Mean measurement is within the limits

listed in the above table.

e. For the 50 mV delta measurement, subtract the second 50 mV measure-

ment from the first 50 mV measurement; verify that the difference is within the limits stated in the Delta row of the table.

16. Repeat steps 15a through 15e for each row in the table.

17. Push the waveform off

button.

18. Repeat steps 9 through 17 for each channel of the oscilloscope (not including

the external trigger input).

TDS3000B Series Service Manual

4- 7

Performance Verification

Check Bandwidth

This test checks the bandwidth for each channel.

1. Connect the output of the leveled sine wave generator to the oscilloscope channel 1 input as shown below.

Leveled sine

wave generator

Oscilloscope

Ch 1

2. Push the SAVE/RECALL menu button.

3. Push the Recall Factory Setup screen button and then push the OK Confirm Factory Init screen button.

4. Push the acquire MENU button.

5. Push the Mode screen button and then push the Average screen button.

6. Adjust the number of averages to 16 with the general purpose knob.

7. Push the trigger MENU button.

8. Push the Source screen button and then push the Vert screen button.

9. Push the Coupling screen button and then push the Noise Reject screen

button.

10. Go to step 13.

11. Move the output cable of the leveled sine wave generator to the oscilloscope

channel you want to check.

12. Push the channel button (CH 1, CH 2, CH 3,orCH 4) for the channel you want to check.

13. Set the horizontal SCALE to 10 s/div.

14. Push the vertical MENU button.

15. Push the Coupling screen button and select 50 Ω input resistance.

16. Push the MEASURE menu button.

17. Push the Select Measurement screen button.

4- 8

TDS3000B Series Service Manual

Performance Verification

18. Push the -- m o r e -- screen button until you can select the Pk-Pk measure-

ment.

19. Set the vertical SCALE to 100 mV/div.

20. Set the output frequency of the leveled sine wave generator to 50 kHz.

21. Set the output amplitude of the leveled sine wave generator so the peak-to- peak measurement is between 599 mV and 601 mV.

22. Set the horizontal SCALE to 10 ns/div.

23. Set the output frequency of the leveled sine wave generator to the frequency

shown in the table below.

Oscilloscope model Frequency

TDS301xB 100 MHz

TDS302xB 200 MHz

TDS303xB 300 MHz

TDS304xB 400 MHz

TDS305xB 500 MHz

TDS306xB 600 MHz

24. Verify that the peak-to-peak measurement is ≥425 mV.

25. Push the waveform off

button.

26. Repeat steps 11 through 25 for each channel of the oscilloscope (not including the external trigger input).

TDS3000B Series Service Manual

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Performance Verification

Check Channel

Edge-Trigger Sensitivity at

Maximum Bandwidth

This test checks the edge-trigger sensitivity for each channel, at the oscilloscope maximum bandwidth.

1. Connect the output of the leveled sine wave generator to the oscilloscope

channel 1 input as shown below.

Leveled sine

wave generator

Oscilloscope

Ch 1

2. Push the SAVE/RECALL menu button.

3. Push the Recall Factory Setup screen button and then push the OK Confirm Factory Init screen button.

4. Push the acquire MENU button.

5. Push the Mode screen button and then push the Average screen button.

6. Adjust the number of averages to 16 with the general purpose knob.

7. Push the trigger MENU button.

8. Push the Source screen button and then push the Vert screen button.

9. Set the horizontal SCALE to 10 ns/d iv.

10. Go to step 13.

11. Move the output cable of the leveled sine wave generator to the oscilloscope

channel you want to check.

12. Push the channel button (CH 1, CH 2, CH 3,orCH 4) for the channel you want to check.

13. Push the vertical MENU button.

14. Push the Coupling screen button and select 50 Ω input resistance.

15. Push the MEASURE menu button.

16. Push the Select Measurement screen button.

17. Push the -- m o r e -- screen button until you can select the Pk-Pk measure-

ment.

4- 10

TDS3000B Series Service Manual

Performance Verification

18. Set the vertical SCALE to 500 mV/div.

19. Set the output frequency of the leveled sine wave generator to the frequency

shown in the table below.

Oscilloscope model Frequency

TDS301xB 100 MHz

TDS302xB 200 MHz

TDS303xB 300 MHz

TDS304xB 400 MHz

TDS305xB 500 MHz

TDS306xB 600 MHz

20. Set the output amplitude of the leveled sine wave generator so that the oscilloscope peak-to-peak measurement is approximately 2.5 V. Note the generator output amplitude setting.

21. Set the leveled sine wave generator output amplitude to one-fifth of the output amplitude value that was set in step 20.

22. Push the SET TO 50% button. Adjust the trigger LEVEL as necessary and then verify that triggering is stable.

23. Push the trigger MENU button.

24. Push the Slope screen button and select the \ (falling) slope.

25. Push the SET TO 50% button. Adjust the trigger LEVEL as necessary and

then verify that triggering is stable.

26. Push the Slope screen button and select the /(rising)slope.

27. Push the waveform off

button.

28. Repeat steps 11 through 27 for each channel of the oscilloscope (not including the external trigger input).

TDS3000B Series Service Manual

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Performance Verification

Check Channel

Edge-Trigger Sensitivity at

50 MHz

This test checks the edge-trigger sensitivity for each channel at 50 MHz.

1. Connect the output of the leveled sine wave generator to the oscilloscope

channel 1 input as shown below.

Leveled sine

wave generator

Oscilloscope

Ch 1

2. Push the SAVE/RECALL menu button.

3. Push the Recall Factory Setup screen button and then push the OK Confirm Factory Init screen button.

4. Push the acquire MENU button.

5. Push the Mode screen button and then push the Average screen button.

6. Adjust the number of averages to 16 with the general purpose knob.

7. Push the trigger MENU button.

8. Push the Source screen button and then push the Vert screen button.

9. Set the horizontal SCALE to 100 ns/d iv.

10. Go to step 13.

11. Move the output cable of the leveled sine wave generator to the oscilloscope

channel you want to check.

12. Push the channel button (CH 1, CH 2, CH 3,orCH 4) to activate the channel you want to check.

13. Push the vertical MENU button.

14. Push the Coupling screen button and select 50 Ω input resistance.

15. Push the MEASURE menu button.

16. Push the Select Measurement screen button.

17. Push the -- m o r e -- screen button until you can select the Pk-Pk measure-

ment.

4- 12

18. Set the vertical SCALE to 500 mV/div.

TDS3000B Series Service Manual

Performance Verification

19. Set the output frequency of the leveled sine wave generator to 50 MHz.

20. Set the output amplitude of the leveled sine wave generator so that the

oscilloscope peak-to-peak measurement is approximately 3.0 V. Note the generator output amplitude setting.

21. Set the leveled sine wave generator output amplitude to one-tenth of the

output amplitude value that was set in step 20. If you are using the recommended signal generator model, select the ÷10 soft key.

22. Push the SET TO 50% button. Adjust the trigger LEVEL as necessary and

then verify that triggering is stable.

23. Push the trigger MENU button.

24. Push the Slope screen button and select the \ (falling) slope.

25. Push the SET TO 50% button. Adjust the trigger LEVEL as necessary and

then verify that triggering is stable.

26. Push the Slope screen button and select the /(rising)slope.

27. Push the waveform off

28. Repeat steps 11 through 27 for each channel of the oscilloscope (not

including the external trigger input).

button.

TDS3000B Series Service Manual

4- 13

Performance Verification

Check Sample Rate and

Delay Time Accuracy

This test checks the time base accuracy.

1. Connect the output of the time mark wave generator to the oscilloscope channel 1 input as shown below.

Time mark

generator

Oscilloscope

Ch 1

2. Push the SAVE/RECALL menu button.

3. Push the Recall Factory Setup screen button and then push the OK Confirm Factory Init screen button.

4. Push the DELAY buttontoturndelayoff.

5. Push the vertical MENU button.

6. Push the Coupling screen button and select 50 Ω input resistance.

7. Set the time mark generator period to 100 ms. Use a time mark waveform

with a fast rising edge.

8. If adjustable, set the time mark amplitude to approximately 1V

p-p

9. Set the vertical SCALE to 500 mV/div.

10. Set the horizontal SCALE to 20 ms/div.

11. Adjust the vertical POSITION control to center the time mark signal on the

screen.

12. Adjust the trigger LEVEL as necessary to obtain a triggered display.

13. Adjust the horizontal POSITION control to move the trigger location to the

center of the screen (50%).

14. Push the DELAY button to turn delay on.

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TDS3000B Series Service Manual

Performance Verification

15. Turn the horizontal POSITION control counter-clockwise to set the delay to exactly 100 ms.

16. Set the horizontal scale to 1 s/div.

17. Check that the rising edge of the marker crosses the center horizontal

graticule line within ±2 divisions of center graticule.

NOTE. One division of displacement from graticule center corresponds to a 10 ppm time base error.

This completes the performance verification procedure.

TDS3000B Series Service Manual

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Performance Verification

4- 16

TDS3000B Series Service Manual

Adjustment Procedures

This chapter contains the factory adjustment procedures for the TDS3000B series oscilloscopes. Only qualified personnel should perform adjustment procedures. Read the Service Safety Summary and the General Safety Summary before performing any service procedures. Also refer to the chapter Operating Information for information about using the oscilloscope.

NOTE. The voltage references inside the oscilloscope are very stable over time and should not require routine adjustment. Before performing any procedure in this chapter, do the Performance Verification procedures (Section 4) to check whether or not the oscilloscope meets specifications.

Successful completion of this adjustment procedure automatically updates the instrument Calibration Due date and time. Successful completion of the Performance Verification procedure in Section 4 does not update the instrument Calibration Due date and time.

Required Equipment

The following equipment, or a suitable equivalent, is required to complete these procedures.

Minimum

Description

DC voltage source 50 mV to 70 V, ±0.1% amplitude

Leveled sine wave generator 30 kHz to 80 MHz, 100 ppm

Fast-rise generator 100 Hz - 1 MH z repetition rate,

50 Ω BNC cable (five required

BNC T (three required1) One male and two female BNC

)

requirements

accuracy

frequency accuracy, 3% amplitude accuracy

2.2 V Pk-Pk signal (--2.2 V to 0 V) unloaded signal, ≤1nsrise time

BNCmaletoBNCmale,≈ 10 in (25 cm) long

connectors

Example

Wavetek 9500 Oscilloscope Calibrator with one 9510 Output Module

Tektronix part number 012-0208-00

Tektronix part number 103-0030-00

TDS3000B Series Service Manual

5- 1

Adjustment Procedures

Minimum

Description Example

BNC female-to-female adapter

requirements

Two female BNC connectors Tektronix part number

103-0028-00

Adjustment tool Non conducting shaft with diame-

The number required is reduced by two if you are adjusting a two-channel oscilloscope.

Overview of the Adjustment Process

The oscilloscope is protected from inadvertently changing factory adjustments by a rear-panel switch. To perform the factory adjustment, you must push and hold the switch while you power on the oscilloscope.

Before performing adjustment procedures, you must warm up the oscilloscope at least ten minutes in an ambient temperature between 20° C and 30° C. Adjustments performed prior to warm-up or outside this temperature range may result in poor performance. You must also recall the default factory settings before starting the factory adjustment procedure.

The factory adjustment procedure consists of a series of steps; as you move through these steps, the oscilloscope display provides instructions that describe the specific input signal requirements for each step. If the the step passes, the oscilloscope moves on to the next step. If any step fails, you can repeat the step or choose to abort the procedure.

ter ≤2.5 mm (≤0.1 in)

Tektronix part number 003-1433-00

5- 2

NOTE. Do not turn any knobs or push any front-panel buttons other than the Next Step or Previous Step buttons during the adjustment procedure. Doing so will cause the oscilloscope to abort the adjustment procedure. The oscilloscope uses the previous calibration constants if the adjustment procedure is aborted.

The screen does not display the actual oscilloscope settings (such as channel input impedance, vertical and horizontal settings, and so on) during the adjustment procedure. The oscilloscope automatically sets the instrument settings, but these settings may not read out correctly on the display.

During some steps, the instrument may appear to be idle for several minutes while it is processing information internally. Please have patience.

If all steps in the procedure are completed successfully, a “Pass” message is displayed and the new calibration constants take affect. If the procedure fails for any reason, the oscilloscope reverts to the previous calibration settings.

TDS3000B Series Service Manual

Signal Connections

Adjustment Procedures

The adjustment procedure requires three types of equipment setups if you are adjusting a four-channel oscilloscope, or four types if you are adjusting a two-channel oscilloscope. For each step of the procedure, the oscilloscope display indicates which setup is the correct one to use. The equipment setups are described below.

Applying DC Voltage to

Input Channels

The first adjustment procedures require a DC voltage (or zero volts) applied simultaneously to all instrument channels. A typical on-screen instruction might read:

Apply 0.0000 V DC signal to all channels.

When you see an instruction similar to this, connect the oscilloscope to the DC voltage source to all the channels as shown below and then set the DC voltage to the specified value.

DC voltage

source

DC voltage

source

Four-channel oscilloscope

Equal-length BNC cables

BNC tees

Two-channel oscilloscope

TDS3000B Series Service Manual

Equal-length BNC cables

BNC tee

5- 3

Adjustment Procedures

NOTE. If the DC voltage source you are using has an output head, use a female-to-female BNC adapter and a short BNC cable to make the connection to the first BNC tee.

A number of steps require setting the input voltage to 0.0000 V. Some calibration equipment can inject a small amount of noise or have a very low-level AC signal near ground. This can result in failure of the performance verification procedure even though the instrument passes the factory adjustment procedure. If you think that your calibration equipment injects noise or AC at zero volts, make sure to disconnect signal cables from the oscilloscope for all steps that require 0.000 V input.

Applying AC Voltage to a

Channel

Later in the procedure, a leveled sine wave needs to be applied to each channel, one channel at a time. A typical on-screen instruction might read:

Apply 400.00 mV Pk-Pk 80 MHz sine wave signal to channel 1 only.

When you see an instruction similar to this, connect the leveled sine wave generator to the specified channel and then set the amplitude and frequency to the specified values.

Leveled sine

wave generator

Oscilloscope

Ch 1

NOTE. If the leveled sine wave generator you are using has an output head, connect the head directly to the channel input.

5- 4

Make sure that the AC generator output is set for a 50-ohm load for all AC-source steps.

TDS3000B Series Service Manual

Adjustment Procedures

Applying Fast Rise Step

Signals to all Channels

During the procedure a fast rise step signal needs to be applied simultaneously to all channels. A typical on-screen instruction might read:

Apply -2.2 V to 0 V (unloaded), fast-rise signal (

≤1 ns)

to all channels.

Use the Applying DC Voltage to Input Channels equipment setup shown on page 5--3.

NOTE. Make sure to set the generator source impedance to 50 ohms.

Set the fast-rise signal repetition rate to anywhere between 100 Hz and 1 MHz, inclusive.

The fast-rise signal Pk-Pk range is -2.2 V to 0 V (unloaded). Measure the fast-rise signal, using an independent device with an input termination set to 1MΩ or greater, to verify that the fast-rise signal does vary between --2.2 V and 0 V, regardless of the generator’s programmed value. This ensures that there is enough signal range to adjust either 2-channel or 4-channel oscilloscopes.

Make sure that the coax cable connection path length is the same for all channels.

Applying DC Voltage to

the External Trigger

If you are adjusting a two-channel oscilloscope, a DC voltage needs to be applied to the external trigger input. A typical on-screen instruction might read:

Apply -5.00 V DC signal to external trigger input.

When you see an instruction similar to this, connect the oscilloscope to the DC voltage source and set the DC voltage to the specified value.

DC voltage

source

Oscilloscope

Ext Trig

NOTE. If the DC voltage source you are using has an output head, connect the head directly to the external trigger input.

TDS3000B Series Service Manual

5- 5

Adjustment Procedures

Factory Adjustment Procedure

To perform the factory adjustment procedure, do these steps:

1. Connect the oscilloscope to an AC power source.

NOTE. You must connect the oscilloscope and the test equipment to the same AC power circuit. Connect the oscilloscope and test instruments into a common power strip if you are unsure of the AC power circuit distribution. Connecting the oscilloscope and test instruments into separate AC power circuits can result in offset voltages between the equipment, which can invalidate the adjustment procedure.

2. Locate the hole that provides access to the CAL switch on the rear panel.

CAL

5- 6

3. Put the adjustment tool into the CAL switch hole. Push and hold the CAL

switch in while you power on the oscilloscope. Release the switch when the oscilloscope shows the power-on message with the oscilloscope graticule in the background.

4. Push the SAVE/RECALL button.

5. Push the Recall Factory Setup screen button.

6. Push the OK Confirm Factory Init screen button to restore factory settings

prior to doing the factory calibration.

NOTE. Do not skip the Recall Factory Setup steps. Y ou must recall the factory settings in order to correctly start the factory adjustment procedure.

7. Push the MENU OFF button.

TDS3000B Series Service Manual

Adjustment Procedures

8. Push the UTILITY button.

9. Push the System screen button to select Cal.

10. Push the Factory screen button.

11. Push the OK Do Factory Calibration screen button to start the adjustment

process.

12. Connect signals from the DC voltage source, leveled sine wave, or fast-rise generator as instructed by the oscilloscope display. After you connect the correct signal, push the OK Do Next Step screen button to continue the process.

NOTE. The oscilloscope adjusts itself automatically using the reference signal from the DC voltage source, leveled sine wave, or fast-rise generator. There are no manual oscilloscope adjustments that you need to make.

If you make an error, such as connecting the wrong input signal, you can repeat the last step by pushing the Return to Previous Screen screen button.

13. Continue the adjustment process until it is complete. You can abort the process at any time by pushing the MENU OFF button or by changing to a different menu.

14. Do the performance verification tests (Section 4) to verify that the adjustment procedure has correctly calibrated the oscilloscope. Incorrect use of calibration equipment can cause the oscilloscope to pass the adjustment procedure but fail performance verification. Refer to the note on page 5--4 regarding possible injected noise for 0.000V DC input levels.

TDS3000B Series Service Manual

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Adjustment Procedures

5- 8

TDS3000B Series Service Manual

Maintenance

This chapter contains the information needed to do periodic and corrective maintenance on the oscilloscope. The following sections are included:

H Preparation refers you to important information contained elsewhere in this

manual.

H Preventing ESD provides general information on preventing damage to

internal modules when doing maintenance.

H Inspection and Cleaning provides procedures for inspecting the oscilloscope

and cleaning its external and internal modules.

H Removal and Installation Procedures provide procedures for the removal and

installation of modules.

H Troubleshooting provides information for isolating failed modules.

H Unpacking and Repacking Instructions provides packaging information for

shipment or storage.

Preparation

Preventing ESD

Only qualified personnel should perform service procedures. Read the Service Safety Summary and the General Safety Summary before performing any service

procedures. Also refer to the chapter Operating Information for information about using the oscilloscope.

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

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

1. Minimize handling of static-sensitive modules.

2. Transport and store static-sensitive modules in their static protected

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

TDS3000B Series Service Manual

6- 1

Maintenance

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

4. Nothing capable of generating or holding a static charge should be allowed

5. Handle circuit boards by the edges when possible.

6. Do not slide the modules over any surface.

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

Inspection and Cleaning

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

wrist strap while handling these modules. Do service of static-sensitive modules only at a static-free work station.

on the work station surface.

capable of generating a static charge.

General Care

Inspection and Cleaning

Procedures

Preventive maintenance consists of visually inspecting and cleaning the oscilloscope, and using general care when operating it. How often to do maintenance depends on the severity of the environment in which the oscilloscope is used. A proper time to perform preventive maintenance is just before adjustment of the oscilloscope.

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

Do not store or leave the oscilloscope where the LCD display will be exposed to direct sunlight for long periods of time.

CAUTION. To avoid damage to the oscilloscope, do not expose it to any sprays, liquids, or solvents.

Inspect and clean the oscilloscope as often as operating conditions require. The collection of dirt on internal components can cause them to overheat and breakdown. Dirt acts as an insulating blanket, preventing efficient heat dissipation. Dirt also provides an electrical conduction path that could cause an oscilloscope failure, especially under high-humidity conditions.

6- 2

TDS3000B Series Service Manual

Maintenance

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

Cleaning Procedure — Exterior. To clean the oscilloscope exterior, perform the following steps:

1. Remove loose dust on the outside of the oscilloscope with a lint free cloth. Use care to avoid scratching the clear plastic display filter.

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

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

Inspection — Interior. During normal use, the oscilloscope case protects the internal components against common dust and dirt. However, if it appears that the oscilloscope may have been damaged or has been exposed to an unusually dirty or wet environment, you should inspect and clean the interior.

To inspect and clean the interior, disassemble the oscilloscope according to the procedure Removal and Installation Procedures on page 6--5.

Inspect the internal portions of the oscilloscope for damage and wear using Table 6--1 as a guide. Defects found should be repaired immediately.

Table 6- 1: Internal inspection check list

Item Inspect for Repair action

Front and Rear Case Cover

Metal chassis pieces Bent, fractured, or broken pieces. Repair or replace defective hard-

Circuit boards Loose, broken, or corroded solder

Cracks or deformations. Broken doors or hinges. Loose labels.

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

Repair or replace defective hardware.

ware.

Remove failed module and replace with a new module.

TDS3000B Series Service Manual

6- 3

Maintenance

Table 6- 1: Internal inspection check list (Cont.)

Item Repair actionInspect for

Solder connections Cold solder or rosin joints. Resolder joint and clean with

isopropyl alcohol.

Wiring and cables Loose plugs or connectors.

Burned, broken, or frayed wiring.

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

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

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

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

alcohol (75% solution) and rinse with warm deionized water. (A cottontipped applicator is useful for cleaning in narrow spaces and on circuit boards.)

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

If steps 1 and 2 do not remove all the dust or dirt, all modules in the oscilloscope except the Display Module, Fan, and Disk Drive may be spray washed using a solution of 75% isopropyl alcohol. Proceed with step 3.

3. Spray wash dirty parts with the 75% isopropyl alcohol solution and wait

60 seconds for the majority of the alcohol to evaporate.

6- 4

4. Use hot (49_ Cto60_ C / 120_ F to 140_ F) deionized water to thoroughly

rinse the parts.

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

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

low-temperature (52_ Cto66_ C / 125_ F to 150_ F) circulating air.

Lubrication. There is no periodic lubrication required for the oscilloscope.

TDS3000B Series Service Manual

Removal and Installation Procedures

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

H List of Modules on page 6--5 describes where to locate a list of replaceable

modules.

H Summary of Procedures on page 6--6 lists the procedures for removal and

installation of modules.

H Tools Required on page 6--7 describes the tools needed to perform the

procedures.

H Handle, on page 6--8, begins a series of procedures that describe the

removal and installation of modules.

Maintenance

Preparation

List of Modules

Please read the following warning statement. Then read the following general instructions before removing a module.

WARNING. Only qualified personnel should perform service procedures. Before doing this or any other procedure in this manual, read the General Safety Summary and Service Safety Summary located at the beginning of this manual. Also, to prevent possible injury to service personnel or damage to electrical components, read Preventing ESD on page ix.

1. Read the Summary of Procedures on page 6--6 to understand which procedure to use to access a given module. Then read Tools Required on page 6--7 for a list of tools needed to remove and install modules in the oscilloscope.

2. If you are disassembling the oscilloscope for cleaning, refer to the Inspection and Cleaning procedure on page 6--2 for cleaning instructions.

3. Remove the optional battery pack and/or communication module before disassembling the oscilloscope.

The Mechanical Parts List chapter provides a list of all replaceable modules. Any electrical or mechanical module, assembly, or part listed in the parts list is referred to as a module.

TDS3000B Series Service Manual

6- 5

Maintenance

Summary of Procedures

Table 6--2 lists the removal and installation procedures in order of increasing complexity. Within each procedure, only perform the steps that are required to access the modules that need repair.

Table 6- 2: Removal and installation procedures

Procedure Modules accessed Begins on page

Handle Handle

Hub cover Hub assembly

Rear case Rear case

Communication module cover Communication module guide Feet Disk drive

Rear chassis Rear chassis

Battery board Power supply Power supply bracket Line filter DC power cable AC line power cable Fan Parallel printer port External power jack

6--8

6--11

6--15

Main board Main board

Display cable Disk drive cable

Front chassis and display Module

Display Inverter board and backlights

Front panel Knobs

Front chassis Display module Inverter cable Inverter board Display module

Inverter board Backlight tubes

Front-panel board Flex circuit keypad contacts Keypads

6--22

6--27

6--30

6--35

6- 6

TDS3000B Series Service Manual

Maintenance

Tools Required

You will need the following tools to remove and replace all the modules in the oscilloscope.

H Torque-limiting screwdriver, 12 in ⋅ lb (1.3 N ⋅ m) range with Torx® T-1 0

and T-15 tips (If you are using a magnetic screwdriver with interchangeable bits, the T-15 bit must be a long bit, at least 5 cm (2 in) overall length).

H Screwdriver with

@8inch flat blade

H3@16inch nut driver

H Needle-nose pliers

TDS3000B Series Service Manual

6- 7

Maintenance

Handle

You will need a

@8inch flat-bladed screwdriver to remove the handle.

Removal. Use this procedure to remove the handle.

1. Use the

@8inch flat-bladed screwdriver to pry the hub cover off of each side

of the handle.

2. Rotate the handle to its full upright position.

3. Locate the handle hub on the display side of the oscilloscope.

NOTE. Do not remove the screw at the center of the handle hub.

4. See Figure 6--1. Use the needle-nose pliers to pull the metal pin in the

display-side hub outward approximately 6 mm (0.25 in). If you accidentally pull the metal pin all the way out, reinsert it half way. The pin may be positioned at either the top or bottom of the hub assembly.

Figure 6- 1: Pulling the hub pin

Handle

Hub Assembly

Metal pin

6- 8

TDS3000B Series Service Manual

Tektronix TDS3052B, TDS3064B, TDS3054B, TDS3044B, TDS3034B Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Table of Contents

List of Figures

List of Tables

General Safety Summary

Service Safety Summary

Preface

Contacting Tektronix

Specifications

Operating Information

Connecting Power

Installing an Application Module

Installing a Communication Module

Front-Panel Menus and Controls

Front-Panel Connectors

Rear-Panel Connectors

Communication Module Connectors

Probe Compensation

Self Calibration

Transporting the Oscilloscope

Theory of Operation

Power supply

Battery Board

Main Board

Display Module

Front-Panel Board

Disk Drive

Performance Verification

Test Record

Performance Verification Procedures

Adjustment Procedures

Required Equipment

Overview of the Adjustment Process

Signal Connections

Factory Adjustment Procedure

Maintenance

Preparation

Preventing ESD

Inspection and Cleaning

Removal and Installation Procedures