xx
MDO4000C Series
ZZZ
Mixed Domain Oscilloscopes
Service Manual
*P077117902*
077-1179-02
xx
MDO4000C Series
ZZZ
Mixed Domain Oscilloscopes
Service Manual
Warning
The servicing instructions ar
only. To avoid personal injury, do not perform any servicing
unless you are qualified to do s
prior to performing service.
e for use by qualified personnel
o. Refer to all safety summaries
www.tek.com
077-1179-02
Copyright © Tektronix. All rights reserved. Licensed software products are owned by Tektronix or its subsidiaries
or suppliers, and are protected by national copyright laws and international treaty provisions.
Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication
supersedes that in all previously published material. Specifications and price change privileges reserved.
TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
Contacting Tektronix
Tektronix, Inc.
14150 SW Karl Braun Drive
P.O . Bo x 500
Beaverto
USA
For product information, sales, service, and technical support:
n, OR 97077
In North America, call 1-800-833-9200.
Worldwide, visit www.tek.com to find contacts in your area.
Table of Contents
Important safety information......... ................................ ................................ ............ iv
General safety summary ..................................................................................... iv
Service safety summary............ ................................ .................................. ........ vi
Terms in thi
Symbols and terms on the product......................................................................... vii
Preface .............................................................................................................. ix
Manual conventions ................ ................................ ................................ .......... ix
Operating Information ............................................................................................. 1
Theory of Operation. ................................ ................................ ............................... 3
Power su
I/O board........................................................................................................ 3
Main board and analog board................................................................................. 3
Front-panel board .............................................................................................. 4
Adjustments ......................................................................................................... 7
Maintenance......................................................................................................... 9
enting ESD ................................................................................................ 9
Prev
Inspection and cleaning .............. ................................ ................................ ......... 9
Module removal............................................................................................... 13
Troubleshooting....................... ................................ ................................ ........ 15
Troubleshooting procedure .................................................................................. 15
Unpacking and repacking instructions ..................................................................... 19
placeable Parts List....................... ................................ ................................ ...... 21
Re
Parts ordering information................................................................................... 21
Using the replaceable parts list.............................................................................. 22
s manual ......................... ................................ ............................... vii
pply .................... ................................ ................................ ............... 3
MDO4000C Series Mixed Domain Oscilloscopes Service Manual i
Table of Contents
List of Figure
Figure 1: MDO4000C block diagram......... ................................ ................................ ... 5
Figure 2: Re
Figure 3: Module locator ..................... ................................ .................................. .. 14
Figure 4: Primary troubleshooting procedure .................................................................. 16
Figure 5: AC power supply troubleshooting procedure....................................................... 17
Figure 6: Module isolation troubleshooting procedure........................................................ 18
Figure 7: Front panel assembly, non-SA models................... .................................. .......... 24
Figure 8:
Figure 9: Display, analog, and main board assemblies, non-SA models .......................... .......... 28
Figure 10: Display, analog, and main board assemblies, SA models .................................. ...... 30
Figure 11: Rear chassis, all models...................................... ................................ ........ 32
Figure 12: Front and back case .......................... ................................ ........................ 33
Figure 13: Rear chassis, showing cables and connectors ... .................................. ................ 34
e 14: Main board, showing cable and connectors ....................................................... 35
Figur
moving tabs from the front protective cover..................................................... 13
Front panel assembly, SA models.......... ................................ .......................... 26
s
ii MDO4000C Series Mixed Domain Oscilloscopes Service Manual
List of Tables
Table 1: External inspection checklist................. ................................ .......................... 11
Table 2: Int
Table 3: Parts list column descriptions...................... ................................ .................... 22
Table 4: Front panel assembly, non-SA models................................................................ 23
Table 5: Front panel assembly, SA models..................................................................... 25
Table 6: Display, analog, and main board assemblies, non-SA models ..................................... 27
Table 7: Display, analog, and main board assemblies, SA models........................................... 29
Table 8: R
Table 9: Front and back case ... ................................ .................................. ................ 33
Table 10: Cable and connectors, rear chassis..................... .................................. ............ 34
Table 11: Cable and connectors, main board ................................................................... 35
ernal inspection checklist ....... .................................. ................................ .. 12
ear chassis, all models ................ ................................ ................................ 31
Table of Contents
MDO4000C Series Mixed Domain Oscilloscopes Service Manual iii
Important safety information
Important saf
ety information
This manual c
for safe operation and to keep the product in a safe condition.
To safely pe
the end of this section. (See page vi, Servicesafetysummary.)
General safety summary
Use the product only as specified. Review the following safety precautions to
avoid injury and prevent damage to this product or any products connected to it.
Carefully read all instructions. Retain these instructions for future reference.
Comply with local and national safety codes.
For correct and safe operation of the product, it is essential that you follow
generally accepted safety procedures in addition to the safety precautions specified
in this manual.
The product is designed to be used by trained personnel only.
Only qualified personnel who are aware of the hazards involved should remove
the cover for repair, maintenance, or adjustment.
ontains information and warnings that must be followed by the user
rform service on this product, additional information is provided at
To avoid fire or personal
jury
in
Before use, always check the product with a known source to be sure it is
operating correctly.
This product is not intended for detection of hazardous voltages.
personal protective equipment to prevent shock and arc blast injury where
Use
hazardous live conductors are exposed.
Use proper power cord. Use only the power cord specified for this product and
certified for the country of use.
Ground the product. This product is grounded through the grounding conductor
f the power cord. To avoid electric shock, the grounding conductor must be
o
connected to earth ground. Before making connections to the input or output
terminals of the product, make sure that the product is properly grounded.
Do not disable the power cord grounding connection.
Power disconnect. The power cord disconnects the product from the power
source. See instructions for the location. Do not position the equipment so that
it is difficult to operate the power cord; it must remain accessible to the user at
all times to allow for quick disconnection if needed.
iv MDO4000C Series Mixed Domain Oscilloscopes Service Manual
Important safety information
Connect and dis
leads while they are connected to a voltage source.
Use only insulated voltage probes, test leads, and adapters supplied with the
product, or indicated by Tektronix to be suitable for the product.
Observe all terminal ratings. To avoi d 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. Do not exceed the
Measurement Category (CAT) rating and voltage or current rating of the lowest
rated individual component of a product, probe, or accessory. Use caution when
using 1:1 test leads because the probe tip voltage is directly transm
product.
Do not apply a potential to any terminal, including the common terminal, that
exceeds the maximum rating of that terminal.
Do not float the common terminal above the rated voltage for that terminal.
Do not operate without covers. Do not operate this product with covers or panels
removed, or with the case open. Hazardous voltage exposure is possible.
Avoid exposed circuitry. Do not touch exposed connections and components
when power is present.
connect properly. Do not connect or disconnect probes or test
itted to the
Do not operate with suspected failures. If you suspect that there is damage to this
product, have it inspected by qualified service personnel.
Disable the product if it is damaged. Do not use the product if it is d amaged
or operates incorrectly. If in doubt about safety of the product, turn it off and
disconnect the power cord. Clearly mark the product to prevent its further
operation.
Before use, inspect voltage probes, test leads, and accessories for m echanical
damage and replace when damaged. Do not use probes or test leads if t hey are
damaged, if there is exposed metal, or if a wear indicator shows.
Examine the exterior of the product before you use it. Look for cracks or missing
pieces.
Use only specified replacement parts.
Use proper fuse. Use only the fuse type and rating specified for this product.
Do not operate in wet/damp conditions. Be aware that condensation may occur if
a unit is moved from a cold to a warm environment.
Do not operate in an explosive atmosphere.
Keep product surfaces clean and dry. Remove the input signals before you clean
the product.
MDO4000C Series Mixed Domain Oscilloscopes Service Manual v
Important safety information
Probes and test leads
Provide proper
details on installing the product so it has proper ventilation.
Slots and open
otherwise obstructed. Do not push objects into any of the openings.
Provide a safe working environment. Always place the product in a location
convenient for viewing the display and indicators.
Before connecting probes or test leads, connect the power cord from the power
connector to a properly grounded power outlet.
Keep fingers behind the finger guards on the probes.
Remove all probes, test leads and accessories that are not in use.
Use only
and amperage rated probes, test leads, and adapters for any measurement.
Beware of high voltages. Understand the voltage ratings for the probe you are
using and do not exceed those ratings. Two ratings are important to know and
understand:
The maximum measurement voltage from the probe tip to the probe reference
lead.
ventilation. Refer to the installation instructions in the manual for
ings are provided for ventilation and should never be covered or
correct Measurement Category (CAT), voltage, temperature, altitude,
These two voltage ratings depend on the probe and your application. Refer to the
Specifications section of the manual for more information.
WARNING. To prevent ele ctrical shock, do not exceed the maximum measurement
or
tip, or probe reference lead.
Servicesafetysummary
The Service safety summary section contains additional information required to
safely perform service on the product. Only qualified personnel should perform
service procedures. Read this Servic e safety summary and the General safety
summary before performing any service procedures.
To avoid electric shock. Do not touch exposed connections.
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.
The maximum floating voltage from the probe reference lead to earth ground
maximum floating voltage for the oscilloscope input BNC connector, probe
vi MDO4000C Series Mixed Domain Oscilloscopes Service Manual
Important safety information
Terms in this manual
Disconnect pow
disconnect the power cord from the mains power before removing any covers or
panels, or opening the case for servicing.
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 b
Verify safety after repair. Always recheck ground continuity and mains dielectric
strength after performing a repair.
These t erms may appea r in this manual:
WAR N ING. 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.
er. To avoid electric shock, switch off the product power and
efore removing protective panels, soldering, or replacing components.
Symbols and terms o n the product
These terms may appear on the product:
GER indicates an injury hazard immediate ly accessible as you read
DAN
the marking.
NING indicates an injury hazard not immediately accessible as you
WAR
read the marking.
UTION indicates a hazard to property including the product.
CA
When this symbol is marked on the product, be sure to consult the manual
to find out the nature of the potential hazards and any actions which have to
e taken to avoid them. (This symbol may also be used to refer the user to
b
ratings in the manual.)
The following symbol(s) may appear on the product:
MDO4000C Series Mixed Domain Oscilloscopes Service Manual vii
Important safety information
viii MDO4000C Series Mixed Domain Oscilloscopes Service Manual
Preface
This service manual provides information that you need to troubleshoot,
disassemble, and replace parts on the following Tektronix oscilloscopes:
Manual conventions
Modules
Replaceable parts
Model Bandwidth
MDO4104C 1 GHz
MDO4054C
MDO4034C
MDO4024C
500 MHz 4
350 MHz 4
100 MHz 4
Channels RF frequency range
4
Option SA3:
Option SA6:
Option SA3:
Option SA6:
Option SA3:
Option SA6:
Option SA3:
Option SA6:
9kHz–3GHz
9kHz–6GHz
9kHz–3GHz
9kHz–6GHz
9kHz–3GHz
9kHz–6GHz
9kHz–3GHz
9kHz–6GHz
This manual uses certain conventions that you should become familiar with
before performing service.
ughout this manual, any replaceable component, assembly, or part is referred
Thro
to by the term module.
This manual refers to any field-replaceable assembly or mechanical part
cifically by its name or generically as a replace able part. In general, a
spe
replaceable part is any circuit board or assembly, such as the hard disk drive, or a
mechanical part, such as the I/O port connectors, that is listed in the replaceable
parts list.
Safety
Symbols and terms related to safety appear in the General Safety Summary.
nformation for service procedures appears in both the General Safety Summary
I
and the Service Safety Summary.
MDO4000C Series Mixed Domain Oscilloscopes Service Manual ix
Preface
x MDO4000C Series Mixed Domain Oscilloscopes Service Manual
Operating Information
For information on installing and operating your oscilloscope, refer to the
Tektronix MDO4000C Series Mixed Domain Oscilloscopes User Manual, which
was provided
with your oscilloscope. This manual is available in 11 languages.
MDO4000C Series Mixed Domain Oscilloscopes Service Manual 1
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