xx
ZZZ
DPO2000 and MSO2000 Series Oscilloscopes
Service Manual
*P071233100*
071-2331-00
xx
ZZZ
DPO2000 and MSO2000 Series Oscilloscopes
Service Manual
Revision B
www.tektronix.com
071-2331-00
Copyright © Tektronix. All rights reserved. Licensed software products are owned by Tektronix or its subsidiaries
or suppliers, and are protected by national copyright laws and international treaty provisions.
Tektronix products are c overed by U.S. and foreign patents, issued and pending. Information in this publication
supersedes that in all previously published material. Specifications and price change privileges reserved.
TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
Tektronix is an authorized licensee of the CompactFlash® trademark.
Contacting Tektronix
Tektronix, Inc.
14150 SW Karl Braun Drive
P.O. B o x 5 0 0
Beaverton, OR 97077
USA
For product information, sales, service, and technical support:
In North America, call 1-800-833-9200.
Worl dwid e, v isit www.tektronix.com to find contacts in your area.
Table of Contents
General safety summary ............................................ ................................ .............. iv
Service safety summary........................................................................................... vi
Preface............................................................................................................. vii
Manual Conv
Related Documentation ..................................................................................... vii
Operating Information ............................................................................................. 1
Theory of Operation....................... ................................ ................................ ......... 3
Block Diagram........ ................................ ................................ ......................... 3
Power Supply................................................................................................... 4
Front En
Main Board ..................................................................................................... 4
Front-Panel Board .......................................... .................................. ................. 4
Adjustment Procedures ............................................................................................ 5
Required Equipment........................ ................................ ................................ ... 5
Overview of the Adjustment Process ........................................................................ 6
ory Adjustment Procedure ............................................................................... 7
Fact
Completing the Procedure ................................. ................................ ................... 9
Maintenance........................................................................................................ 13
Preventing ESD ............................................................................................... 13
Inspection and Cleaning.. .................................. ................................ .................. 13
Overview of Removal Procedures ...... ................................ ................................ .... 17
moval Procedures.......................................................................................... 18
Re
Troubleshooting..................................... ................................ .......................... 24
Troubleshooting Procedure .... ................................ ................................ .............. 25
Unpacking and Repacking Instructions .................. ................................ .................. 27
Replaceable Parts List............................. ................................ ................................ 29
Parts Ordering Information .................................................................................. 29
Using the Replaceable Parts List............................................................................ 30
entions.......... .................................. ................................ ............. vii
d Assembly........................................................................................... 4
DPO2000 and MSO2000 Series Service Manual i
Table of Contents
List of Figure
Figure 1: Oscilloscope module interconnections .... . ..... . ..... . . .... . . ..... . ..... . ..... . ..... . ..... . ...... . .. 3
Figure 2: Lo
Figure 3: Primary troubleshooting procedure .................................................................. 25
Figure 4: AC power supply troubleshooting procedure ....................................................... 26
Figure 5: Module isolation troubleshooting procedure........................................................ 27
Figure 6: Front trim ....................... ................................ ................................ ........ 31
Figure 7: Rear trim ...... ................................ ................................ .......................... 32
Figure 8:
Figure 9: Power supply ........................................................................................... 34
Figure 10: Rear chassis ........................................................................................... 35
Figure 11: Fan ..................................................................................................... 36
Figure 12: Main board .......... ................................ .................................. ................ 37
Figure 13: Front end assembly................................................................................... 38
e 14: Main chassis..................................... ................................ ...................... 39
Figur
Figure 15: Display............................. .................................. ................................ .. 40
Figure 16: Front panel board......................... .................................. .......................... 41
Figure 17: Option key guides .................................................................................... 42
cator for internal modules.............................................. ............................ 18
Rear case ........................ ................................ .................................. ...... 33
s
ii DPO2000 and MSO2000 Series Service Manual
List of Tables
Table i: Related documentation................................................................................. vii
Table 1: Ext
Table 2: Internal inspection check list................................... ................................ ........ 16
Table 3: Front trim ............ ................................ .................................. .................. 31
Table 4: Rear trim ................... ................................ .................................. ............ 32
Table 5: Rear case ............................... ................................ .................................. 33
Table 6: Power supply ................ ................................ ................................ ............ 34
Table 7 : R
Table 8: Fan .......... ................................ .................................. ............................ 36
Table 9: Main board............................................................................................... 37
Table 10: Front end board ........ ................................ .................................. .............. 38
Table 11: Main chassis............................................................................................ 39
Table 12: Display.................................................................................................. 40
Table
Table 14: Option key guides ....... ................................ .................................. ............ 42
Table 15: Replaceable parts list: DPO2000 and MSO2000 Accessories.................................... 43
ernal inspection check list.......................................................................... 15
ear chassis.................................. ................................ ............................ 35
13: Front panel board ................ .................................. ................................ .... 41
Table of Contents
DPO2000 and MSO2000 Series Service Manual iii
General safety summary
General safet
To avoid fir
e or personal
injury
ysummary
Review the fo
this product or any products connected to it.
To avoid pot
Only qualified personnel should perform service procedures.
Use proper
certified for the country of use.
Connect a
leads while they are connected to a voltage source.
Ground th
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.
Observe all terminal ratings. To avoid fire or shock hazard, observe all ratings
and markings on the product. Consult the product manual for further ratings
information before making connections to the product.
llowing safety precautions to avoid injury and prevent damage to
ential hazards, use this product o nly as specified.
power cord. Use only the power cord specified for this product and
nd disconnect properly. Do not connect or disconnect probes or test
eproduct.This product is grounded through the grounding conductor
Connect the probe reference lead to earth ground only.
Do not apply a potential to any terminal, including the common terminal, that
exceeds the maximum rating of that terminal.
Power disconnect. The power cord disconnects the product from the power source.
Donotblockthepowercord;itmustremain accessible to the user at all times.
Do not operate without covers. Do not operate this product with covers or panels
removed.
Do not operate with suspected failures. If you suspect that there is damage to this
product, have it inspected by qualified service per sonnel.
Avoid exposed circuitry. Do not touch exposed connections and components when
power is present.
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 s o it has proper ventilation.
iv DPO2000 and MSO2000 Series Service Manual
General safety summary
Terms in this m anual
Symbols and terms on the
product
These terms may
WAR NI NG . 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.
These terms may appear on the product:
DANGER in
the marking.
WARNING
read the marking.
CAUTIO
The following symbol(s) may appear on the product:
appear in this manual:
dicates an injury hazard immediately accessible as you read
indicates an injury hazard not immediately accessible as you
N indicates a hazard to property including the product.
DPO2000 and MSO2000 Series Service Manual v
Service s afety summary
Service safet
ysummary
Only qualifie
safety summary and the General safety summary before performing any service
procedures.
Do not service alone. Do not perform internal service or adjustments of this
product unless another person capable of rendering 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 p
test leads before removing protective panels, soldering, or replacing components.
To avoi
d personnel should perform service procedures. Read this Service
roduct. Disconnect power, remove battery (if applicable), and disconnect
d electric shock, do not touch exposed connections.
vi DPO2000 and MSO2000 Series Service Manual
Preface
Manual Conventions
This service manual provides information that you need to troubleshoot,
disassemble, and replace parts on the Tektronix DPO2000 and MSO2000 Series
Oscilloscop
es.
l uses certain conventions that you should become familiar with
erm module.
eable part is any circuit board or assembly, such as the power supply, or a
ols and terms related to safety appear in the General Safety Summary
Modules
Replaceable Parts
Safety
This manua
before attempting service.
Throughout this manual, any replaceable component, assembly, or part is referred
to by the t
This manual refers to any field-replaceable assembly or mechanical part
specifically by its name or generically as a replaceable part. In general, a
replac
mechanical part, such as the I/O port connectors, that is listed in the replaceable
parts list.
Symb
Related Documentation
Table i: Related documentation
To read about Use these documents
Installation and Operation DPO2000 and MSO2000 Series Digital Phosphor Oscilloscopes User Manual (available in
11 languages)
Specifications and Performance DPO2000 and MSO2000 Series Specifications and Performance Verification Technical
Reference (PDF only)
Programmer Commands DPO2000 and MSO2000 Series Programmer Manual (PDF only)
Analysis and Connectivity Tools Getting Started with OpenChoice® Solutions Manual
Installing and testing applications
modules
Oscilloscope calibrator Fluke Oscilloscope Calibrator Manual at http://us.fluke.com
DPO2000 and MSO2000 Series Application Modules Installation Instructions Manual
The Tektronix manuals are available on the Web, at www.tektronix.com/manuals.
DPO2000 and MSO2000 Series Service Manual vii
Preface
viii DPO2000 and MSO2000 Series Service Manual
Operating Information
For information on installing and operating your DPO2000 or your MSO2000
Series Oscilloscope, refer to the DPO2000 and MSO2000 Series Oscilloscopes
User Manual.
The User manual is available, in 11 languages, on the Web at www.tektronix.com.
DPO2000 and MSO2000 Series Service Manual 1
Operating Information
2 DPO2000 and MSO2000 Series Service Manual
Theory of Operation
This chapter describes the electrical operation of the oscilloscope to the module
level. Figure 2-1 shows the oscilloscope module interconnections.
Block Diagram
Figure 1: Oscilloscope module interconnections
DPO2000 and MSO2000 Series Service Manual 3
Theory of Operation
Power Supply
Front End Assembly
The Power Supply board converts AC line voltage to +3.3 V, +5 V, –5 V, and
+13 V to power all internal circuits. The Power Supply board also supplies power
to the displa
y backlight.
Main Board
Acquisition System
Trigger System
Display System
The Front E
differential mode channel signals which are passed to the Main board. The analog
inputs, attenuators, and preamps are contained in this assembly.
The Main board module contains the following functions:
The Acq
from the Front End assembly, which are routed to the A/D inputs, and ends with
a digitized signal in memory.
The Tr
trigger functions are enabled only when the appropriate application modules and
supporting software are installed.
The D
menus and text, and stores this information in display memory. It then uses this
data to refresh the WQVGA display module (LCD).
nd assembly begins with the analog signal path and ends with
uisition system begins by accepting the differential mode channel signals
igger system processes the digitized signal stored in memory. Advanced
isplay system combines live waveform data from acquisition memory with
e Processor system contains a Power PC microprocessor that controls the entire
Processor System
Th
instrument. The processor system also contains FLASH ROM, system RAM, and
interfaces to Ethernet and to the USB ports.
Front-Panel Board
The Front Panel board contains a microprocessor that reads the front-panel buttons
and controls, and then sends this information to the processor system on the Main
board. The Front Panel board also generates the probe compensation output signal
and provides an interface to the application modules.
4 DPO2000 and MSO2000 Series Service Manual
Adjustment Procedures
This chapter contains the factory adjustment procedure for the DPO2000 Series
and the MSO2000 Series oscilloscopes. Only qualified personnel should perform
adjustment procedures. Read the Service Safety Summary and the General Safety
Summary before performing any service procedures.
Required Equipment
NOTE. The vo
ltage 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 to check whether
the oscilloscope meets specifications. See the DPO2000 and MSO2000 Series
Specification and Performance Verification Technical Reference.
Successful completion of this adjustment procedure automatically updates the
stored time and date of the latest successful adjustment. Completion of the
Performance Verification procedure does not update this date and time. If no
adjustm
ent is needed, there is also no need to update the time and date of the
adjustment.
The following equipment, or a suitable equivalent, is required to complete these
procedures.
The following table specifies required equipment for the MSO2000 Series
oscilloscope.
cription
Des
oltage source
DC v
gital calibrator probe
Di
BNC to square pin adapter Connects signal from BNC
imum requiremen ts
Min
to 25 V, ±0.1%
5mV
amplitude accuracy
ecision test probe, 16
Pr
digital channels
to 16 square pins
mple
Exa
Fluke or Wavetek 9500
illoscope Calibrator with
Osc
five 9530 active heads.
ktronix Part Number
Te
067-6316-00
ktronix Part Number
Te
878-0219-00
The following table specifies required equipment for the DPO2000 Series
scilloscope.
o
DPO2000 and MSO2000 Series Service Manual 5
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