xx
MSO4000B and DPO4000B Series
ZZZ
Digital Phosphor Oscilloscopes
Service Manual
*P077051201*
077-0512-01
xx
MSO4000B and DPO4000B Series
ZZZ
Digital Phosphor Oscilloscopes
Service Manual
This document applies to firmware version 1.00 and above.
Warning
The servicing instructions are for use by qualified personnel
only. To avoid personal injury, do not perform any servicing
unless you are qualified to do so. Refer to all safety summaries
prior to performing service.
www.tektronix.com
077-0512-01
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 50 0
Beaverto
USA
For product information, sales, service, and technical support:
n, OR 97077
In North America, call 1-800-833-9200.
World wide , vis i t www.tektronix.com to find contacts in your area.
Table of Contents
General Safety Summary ......................................................................................... iv
Preface ............................................................................................................. vii
Manual Conventions...... .................................. ................................ ................. vii
Where to Fin
Theory of Operation... ................................ ................................ ............................. 3
Power Supply................................................................................................... 3
I/O Board ........................ ................................ ................................ ............... 3
Main Board and Analog Board............................................................................... 3
Front-Panel Board ...... ................................ ................................ ....................... 4
Adjustm
Required Equipment.... ................................ ................................ ....................... 7
Before Adjustments......... ................................ .................................. ................. 8
Navigating During Adjustments .. .................................. ................................ ......... 8
Connecting the Equipment......... ................................ .................................. ......... 9
Factory Adjustment Procedure .............................................................................. 10
Sett
Maintenance........................................................................................................ 19
Preventing ESD............................................................................................... 19
Inspection and Cleaning.............................. ................................ ........................ 19
Module Removal.... ................................ .................................. ........................ 23
Troubleshooting......... ................................ ................................ ...................... 25
Tr
Unpacking and Repacking Instructions .......... ................................ .......................... 29
Replaceable Parts List........................................... ................................ .................. 31
Parts Ordering Information .................................................................................. 31
Using the Replaceable Parts List............................................................................ 32
d Operating Information......................... ................................ ................... 1
ent Procedure... .................................. ................................ ......................... 7
ing the Calibrator Output Signal........................................................................ 13
oubleshooting Procedure .... .................................. ................................ ............ 25
MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual i
Table of Contents
List of Figure
Figure 1: Four-channel model MSO4000B and DPO4000B series block diagram .......... ............... 5
Figure 2: Tw
Figure 3: Removing tabs from the front protective cover..................................................... 23
Figure 4: Module locator ..... .................................. ................................ .................. 24
Figure 5: Primary troubleshooting procedure .................................................................. 26
Figure 6: AC power supply troubleshooting procedure....................................................... 27
Figure 7: Module isolation troubleshooting procedure........................................................ 28
Figure 8:
Figure 9: Display, Analog board, and Main board assembly ................................................ 36
Figure 10: Rear chassis and connecting modules .............................................................. 38
Figure 11: External parts ......................................................................................... 39
Figure 12: Rear chassis, showing cables and connectors ....... ................................ .............. 40
Figure 13: Main board, showing cable and connectors ....................................................... 41
o-channel model MSO4000B and DPO4000B series block diagram................. ......... 6
Exploded view, Front Panel assembly............................................................... 34
s
ii MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual
List of Tables
Table 1: External inspection checklist................................... ................................ ........ 21
Table 2: Int
Table 3: Parts list column descriptions.................................. ................................ ........ 32
Table 4: Replaceable parts – Front Panel assembly ............. .................................. ............ 33
Table 5: Replaceable parts – Display, Analog board, and Main board ...................................... 35
Table 6: Replaceable parts – Rear chassis and connecting modules ........ ................................ 37
Table 7: Replaceable parts – external parts..................................................................... 39
Table 8: R
Table 9: Replaceable parts – cable and connectors, Main board ............................................. 41
ernal inspection checklist ... ................................ .................................. ...... 21
eplaceable parts – cable and connectors, rear chassis ............... .............................. 40
Table of Contents
MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual iii
General Safety Summary
General Safet
To Avoid Fire or Personal
Injury
ySummary
Review the fo
this product or any products connected to it.
To avoid potential hazards, use this product only as specified.
Only qualified personnel should perform service procedures.
Use proper power cord. Use only the power cord specified for this product and
certified for the country of use.
Connect and disconnect properly. Do not connect or disconnect probes or test
leads while they are connected to a voltage source.
Connect and disconnect properly. De-energize the circuit under test before
connecting or disconnecting the current probe.
Ground the product. This product is grounded through the grounding conductor
of the power cord. To avoid electric shock, the grounding conductor must be
connected to earth ground. Before making connections to the input or output
terminals of the product, ensure that the product is properly grounded.
Observe all terminal ratings. To a void 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
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 o f that termi
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 personnel.
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 so it has proper ventilation.
nal.
iv MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual
General Safety Summary
TermsinThisManual
Symbols and Terms on the
Product
These terms may
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.
These terms may appear on the product:
DANGER in
the marking.
WAR N IN G
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.
MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual v
General Safety Summary
vi MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual
Preface
This service manual provides information that you need to troubleshoot,
disassemble, and replace parts on the following Tektronix oscilloscopes:
Model Bandwidth Analog Channels
Manual Conventions
MSO4104B 1 GHz
MSO4104B-L 1 GHz
MSO4102B 1 GHz
MSO4102B-L 1 GHz
MSO4054B
MSO4034B
DPO4104B 1 GHz
DPO4104B-L 1 GHz
DPO4102B 1 GHz
DPO4102B-L 1 GHz
DPO4054B
DPO4034B
500 MHz 4
350 MHz 4
500 MHz 4
350 MHz 4
4
4
2
2
4
4
2
2
This manual uses certain conventions that you should become familiar with
before performing service.
Modules
Throughout this manual, any replaceable component, assembly, or part is referred
to by the term module.
Replaceable Parts
This manual refers to any field-replaceable assembly or mechanical part
specifically by its name or generically as a r eplaceable part. In general, a
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.
Information for service procedures appears in both the General Safety Summary
and the Service Safety Summary.
MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual vii
Preface
viii MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual
WheretoFindOperatingInformation
For information on installing and operating your DPO4000B or your MSO4000B
Series Digital Phosphor Oscilloscope, refer to the Tektronix MSO4000B Series
and DPO4000B
provided with your oscilloscope. This manual is also available, in 11 languages,
at www.tektronix.com/manuals.
Series Digital Phosphor Oscilloscopes User Manual, which was
MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 1
Where to Find Operating Information
2 MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual
Theory of Operation
This chapter describes the electrical operation of the oscilloscope to the module
level. The block diagrams show four-channel and two-channel oscilloscope
module inter
Power Supply
connections. (See Figure 1 on page 5.) (See Figure 2 on page 6.)
The Power S
internal circuits.
I/O Board
The I/O board contains USB ports, an Ethernet port (LAN), a VGA Video port, an
AUX OUT BNC connector, and an EXT REF IN BNC connector.
Main Board and Analog Board
The Main and Analog boards contain the following functions:
Acquisition System
Trigger System
The Ac
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 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
are installed.
quisition system begins with the analog signal path and ends with a
upply board converts AC line voltage to +12 V to power for all
splay System
Di
Processor System
MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 3
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 XGA display module (LCD).
The Processor system contains a 460EX Power PC microprocessor that controls
the entire instrument. The processor system also contains FLASH ROM, system
RAM, and interfaces to USB ports and the Ethernet port.
Theory of Operation
Power Converter
Front-Panel Board
The Power Conve
main power supply and generates voltages for the analog and digital circuitry on
the Main board. The front panel receives the +5 V standby power, and uses input
from the power switch to turn the oscilloscope on and off.
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 provid
es an interface to the application modules.
rter receives +12 V power and +5 V standby power from the
4 MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual
Theory of Operation
Figure 1: Four-channel model MSO4000B and DPO4000B series block diagram
MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 5
Theory of Operation
Figure 2: Two-channel model MSO4000B and DPO4000B series block diagram
6 MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual
Adjustment Procedure
This section contains the factory adjustment procedure for the DPO4000B Series
and the MSO4000B Series oscilloscopes. Only qualified personnel should
perform adjustment procedures.
Required Eq
uipment
The following equipment, or a suitable equivalent, is required to complete these
procedures.
The follow
ing table specifies the equipment that is required to adjust the
DPO4000B Series oscilloscopes.
Description Minimum requirements Example
DC voltage source 20 mV to 100 V into 1 MΩ
6Vinto50Ω
±0.1% amplitude accuracy
Time Mark Generator 1.6 ms (625 Hz), 0.5
symmetrical about 0 V into
50 Ω.
Sine Generator Symmetrical about 0 V from
250 mV to 25 V into 1 MΩ.
Aberrations <0.1% after
500 ns.
Edge Generator
Adjustment tool
1 kHz with <50 ps ch-ch
skew
Nonconducting shaft with
diameter = 0.1 in (= 2.5 mm)
p-p
Fluke 9500B Oscilloscope
Calibrator with 9530 active
heads
Fluke 9500B Oscilloscope
Calibrator with one 9530
head
Fluke 9500B Oscilloscope
Calibrator with one 9510
Output Module
Tektronix part number
003-1433-00
The following table specifies the equipment that is required to adjust the
MSO4000B Series oscilloscopes.
Description Minimum requirements Example
DC voltage source
Digital calibrator probe Tektronix part number:
50 mV to 70 V
±0.1% amplitude accuracy
Fluke 9500B Oscilloscope
Calibrator with five 9530
active heads
067-2121-00
MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 7
Adjustment Procedure
Before Adjust
ments
NOTE. The voltage references inside the oscilloscope are very stable over time
and should not require routine adjustment.
Before performing the adjustment procedure, do the following:
Read the Ser
front of this manual.
Perform t
operating within specifications, you do not need to make any adjustments.
(See the MSO4000B Series and DPO4000B Series Oscilloscopes
Specifications and Performance Verification Technical Reference manual,
which was provided with your product. This manual is also available at
www.tektronix.com/manuals.)
Before performing the adjustment procedure, you must warm up the
oscilloscope and the oscilloscope calibrator for at least 30 minutes in an
ambie
warm-up or outside this temperature range may result in poor performance or
failure of the adjustment procedure.
vice Safety Summary and the General Safety Summary at the
he Performance Verification procedures. If the oscilloscope is
nt temperature between 20 °C and 30 °C. Adjustments performed before
Learn how to operate the oscilloscope calibrator. Refer to the user manual,
which can be found at h
Navigating During Adjustments
Continue. Once you have set the calibrator output signal that is specified
on the oscilloscope screen, push the OK Do Next Step side-bezel button to
proceed. Information about setting up the calibrator output signal is provided
after the Factory Adjustment Procedure. (See page 13, Setting the Calibrator
utput Signal.)
O
Go back. Push the Return to Previous Screen side-bezel button to go back
to the previous step. Push the button multiple times if you want to go back
multiple steps.
Abort. Push the Menu Off front-panel button on the oscilloscope to cancel the
procedure at any time. This causes the oscilloscope to revert to the previous
calibration constants. The last factory calibration date will not be updated.
ttp://us.fluke.com.
8 MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual
Adjustment Procedure
Connecting th
e Equipment
Connect the Oscilloscope
and the Calibrator to AC
Power
Connect th e Active Heads
Connect the Digital Probe
(for MSO40 00B Series
Only)
Connect the oscilloscope and the calibrator to the same AC power circuit. Using a
common power strip will accomplish this.
NOTE. Conne
offset voltages between the equipment, which can invalidate this procedure.
Before beginning the adjustment procedure, connect four active heads from
channels 1 through 4 on the calibrator to channels 1 through 4 on the oscilloscope.
Make sure that Channel 1 on the calibrator connects to the Channel 1 input on the
oscillos
When the oscilloscope prompt requires you to connect the calibrator signal to “all
digital channels,” connect the digital probe as follows:
1. Plug the digital probe into the Channel 5 active head on the calibrator.
2. Plug the probe, notch down, into the digital channel input.
3. Make sure that it snaps into place. Keep the probe plugged in for the
remainder of the calibration procedure.
cting the equipment to separate AC power circuits can result in
cope, and so on.
MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 9
Adjustment Procedure
Factory Adjustment Procedure
NOTE. Changing oscilloscope settings will abort the adjustment procedure. Do
not turn any kn
the procedure.
To perform the factory adjustment procedure, complete these steps:
1. Connect the oscilloscope and the calibrator to AC power. Be sure to follow
the instructions provided in Connecting the Equipment.(Seepage9,
Connecting the Equipment.) Failure to follow these instructions can invalidate
this procedure.
2. Power on the oscilloscope and the oscilloscope calibrator and allow them both
to warm up for 30 minutes.
3. Connect the Active Heads, following the instructions provided in Connecting
the Equipment. (Seepage9,Connecting the Equipment.)
obs or push any oscilloscope buttons except those used to navigate
4. Put the oscilloscope into the service mode as follows (can take up to
a. Power off the oscilloscope.
b. Locate the hole in the rear panel that provides access to the CAL switch.
c. Insert the adjustment tool into the CAL switch hole and power on the
oscilloscope while holding in the switch.
d. Continue to hold the switch until the oscilloscope shows the "Power-on
self- passed" message with the oscilloscope graticule in the background.
a minute):
5. Start the factory adjustment routine as follows:
a. Push the Default Setup button on the front panel of the oscilloscope.
b. Push the Utility button on the front panel of the oscilloscope.
c. Push the Utility Page lower-bezel button.
10 MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual
Adjustment Procedure
d. In the utility p
a knob.
e. Push the Facto
f. Note the important information that is displayed in the factory dialog box.
g. Push the OK Do Factory Calibration side-bezel button to start the
adjustment process.
h. You c an cancel the process at any time by pushing the MENU OFF button.
6. Set the calibrator output signal as follows:
NOTE. Incorrect use of calibration equipment can allow the oscilloscope to
successfully complete the Calibration Procedure, and yet fail the Performance
Ver i fica
tion.
a. View the prompt on the oscilloscope screen to determine the required
type, amplitude, and frequency, as well as the required channel(s).
signal
b. Usetheinformationprovidedonthefollowing pages to set the calibrator
e required output signal:
for th
age menu, select Calibration by turning the Multipurpose
ry lower-bezel button.
DCVoltage–(Seepage13.)
TimeMark–(Seepage14.)
Deskew – (See page 16.)
Sine – (See page 15.)
c. On the oscilloscope, push the OK Do Next Step right-bezel button.
The oscilloscope makes the adjustment, using the calibrator signal as a
reference. You do not need to make any adjustments.
NOTE. During the adjustment procedure, the oscilloscope makes the required
settings to oscilloscope parameters, but does not display them on the screen.
MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 11
Adjustment Procedure
7. Continue with t
NOTE. During some steps, the instrument may appear to be idle for several
minutes while it is processing information internally.
a. If you make an error, such as connecting the wrong input signal, push the
Return to Previous Screen side bezel button and repeat the previous step.
Push the button multiple times if you need to go back multiple steps.
b. If the o scilloscope fails a step, refer to Troubleshooting at the end of this
section to fix the problem, and then repeat the previous step.
c. If a step fails twice, return to the first step in the adjustment procedure and
try the entire procedure again. If the procedure still fails, it could indicate
a problem with the oscilloscope. Contact Tektronix for technical support
(see the contact information at the beginning of this manual).
8. When the adjustment procedure is complete, the factory dialog box appears,
showing the updated time and date of the last successful adjustment. This
comple
9. Use the Performance Verification procedure to verify that the adjustment
proce
tes the adjustments.
dure correctly adjusted the oscilloscope to operate within specifications.
he adjustment process as follows:
(See the MSO4000B and DPO4000B Series Oscilloscopes Specifications and
ormance Verification Technical Reference m anual, which is available at
Perf
www.tektronix.com/manuals.)
12 MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual
Adjustment Procedure
Setting the Ca
DC Voltages
librator Output Signal
This section tells how to set the calibrator for the DC Voltage, Time Mark, Deskew
and Sine signals that are required by the adjustment procedure.
Use one of the following three methods to set the DC voltage: to 0 V, to any
voltage into 1 MΩ or ≤5.5 V into 50 Ω, or to voltages over 5.5 V into 50 Ω.
For 0 V.
Complete these steps to set the calibrator output for 0 V and start the adjustment
step:
1. Push the DC/Square
2. Ground the signal by pushing the grounding
3. On the oscilloscope, push the OK Do Next Step right-bezel button.
For voltages Into 1 MΩ and voltages ≤5.5 V into 50 Ω.
Complete these steps to set the calibrator output for all DC voltages into 1 MΩ
and voltages ≤5.5 V into 50 Ω.
button.
lower-bezel button.
1. Select the calibrator signal type as follows:
a. Push the DC/Square
b. Push the WAV EF O R M lower-bezel button, and then push the DC
Positive
2. Set the calibrator output channels and impedance as follows:
a. Push the CHANNEL SELECT lower-bezel button.
b. Select the channel(s) specified by the oscilloscope prompt.
c. Push the LOAD lower-bezel button to highlight either 1MΩ or 50 Ω,as
specified by the oscilloscope prompt.
d. Push the EXIT lower bezel button.
3. Set the calibrator amplitude and start the adjustment step as follows:
a. Select the Amplitude field using the front-panel tab key
b. Set the voltage specified by the oscilloscope prompt.
c. Push the ON button and verify that the red light turns on to indicate that
the calibrator output is on.
right-bezel button.
button.
.
d. On the oscilloscope, push the OK Do Next Step right-bezel button.
MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 13
Adjustment Procedure
For voltages >5
Complete these steps to set the calibrator output for a DC Voltage signal >5.5 V
into 50 Ω (for example, to select 6Vor -6 V in 50 Ω mode):
1. Push the AUX front panel button.
2. Push the
side-bezel button for negative polarity.
3. Set the amplitude.
4. Set the Pulse Energy setting to 7.2 Joules (the Duration should show 10s).
5. When all of the parameters are set, push the ON button and verify that the
calibrator output is on. Then push the Trig Pulse side-bezel button on the
calibrator, to trigger a single shot of the specified pulse output. As soon as
the calibrator settles (about one second), IMMEDIATELY push the OK Do
Next Step side-bezel button on the oscilloscope.
NOTE. The calibrator signal will remain at this voltage for only a few seconds,
so the adjustment step must be done immediately after setting the calibrator
amplitude.
.5 V into 50 Ω.
side-bezel button for positive polarity, or push the
Time Mark
7. If the instrument fails one of these steps, go back and start from the first 6 V
(6 V on channel 1) again.
Complete these steps to set th
1. Select the calibrator output signal type as follows:
a. Push the Markers
b. Push the WAVE F O R M lower-bezel button.
c. Push the
NOTE. If a 625 Hz signal is required, set the time marker to 1.6 ms.
2. Set the calibrator output channels and impedance as follows:
a. Push the CHANNEL SELECT lower-bezel button.
b. Select the channel(s) specified by the oscilloscope prompt.
c. Push the LOAD lower-bezel button to highlight either 1MΩ or 50 Ω,as
specified by the oscilloscope prompt.
e calibrator output for a Time Mark signal.
front-panel button.
side-bezel button.
d. Push the EXIT lower bezel button.
14 MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual
Adjustment Procedure
Sine Signal
3. Verify that th
button until 1.0 is selected.
4. Set the calib
a. Select the Amplitude field using the front-panel tab key
b. Set the voltage specified by the oscilloscope prompt.
5. Push the ON button and verify that the red light turns on to indicate that
the calibrator output is on.
6. On the oscilloscope, push the OK Do Next Step right-bezel button.
Complete these steps to set the calibrator output for a sine wave signal.
1. Push the Sine
2. Verify t
button until 1.0 is selected.
3. Set the
a. Select the Amplitude field using the front-panel tab key
e calibrator is in direct mode by pushing the
rator amplitude as follows:
front-panel button.
hat the calibrator is in direct mode by pushing the
calibrator amplitude as follows:
lower-bezel
.
lower-bezel
.
b. Set the voltage specified by the oscilloscope prompt.
4. Set the calibrator frequency as follows:
a. Select the Frequency field using the front-panel tab key
b. Set the frequency specified by the oscilloscope prompt.
5. Set
6. Push the ON button and verify that the red light turns on to indicate that
7. On the oscilloscope, push the OK Do Next Step right-bezel button.
the calibrator output channels and impedance as follows:
a. Push the CHANNEL SELECT lower-bezel button.
b. Select the channel(s) specified by the oscilloscope prompt.
c. Push the LOAD lower-bezel button to highlight either 1MΩ or 50 Ω,as
specified by the oscilloscope prompt.
d. Push the EXIT lower bezel button.
the calibrator output is on.
.
MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 15
Adjustment Procedure
Deskew
Complete these
NOTE. If you are adjusting an MSO4000B Series, and the oscilloscope prompts
you to connect the digital channels, connect the digital probe according to
the instructions in Connecting the Equipment. (See page 9, Connecting the
Equipment.)
1. Set the calibrator output signal type as follows:
a. Push the Aux front-panel button.
b. Push the Zero skew
NOTE. Selecting the deskew signal automatically turns all channels on.
2. Set the calibrator termination and output channels as follows:
a. Push the CHANNEL SELECT lower-bezel button.
b. Select
c. Push the LOAD lower-bezel button to highlight either 1MΩ or 50 Ω,as
speci
steps to set the calibrator output for deskew.
side-bezel button.
the channel(s) specified by the oscilloscope prompt.
fied by the oscilloscope prompt.
d. Push the EXIT lower bezel button.
3. Set the calibrator amplitude as follows:
a. Select the Amplitude field using the front-panel tab key
b. Set the voltage specified by the oscilloscope prompt.
4. Set the calibrator frequency as follows:
lect the Frequency field using the front-panel tab key
a. Se
b. Set the frequency specified by the oscilloscope prompt.
5. Push the ON button and verify that the red light turns on to indicate that
the calibrator output is on.
6. On the oscilloscope, push the OK Do Next Step right-bezel button. In some
cases, the deskew can take several minutes.
CAUTION. Keep the digital probe plugged in to the oscilloscope. Unplugging the
probe can abort the adjustment.
.
.
16 MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual
Adjustment Procedure
Troubleshooting the
Adjustment Procedure
Refer to the fol
lowing table for solutions to problems that you might encounter
during the calibration procedure.
Problem Possible solutions
The instrument fails an adjustment step Are the channels hooked up properly?
Is the signal being sent to the correct
channels? (Check for the green lights on the
probe heads.)
Is the signal set to the correct waveform,
frequency, and termination (if applicable to
the adjustment step) ?
Is the calibrator output set to ON ? (Is the
red light illuminated?)
If you make a correction or find that
everything is correct, push the Return to
Previous Screen side-bezel button on the
oscilloscope to try the adjustment step again.
I can’t set the amplitude to 0 V, as specified
in the prompt
I can’t find the parameters that I need to set Is the waveform set correctly?
I can’t set the voltage to 625 Hz
I can’t set the signal to all channels
I’m having trouble with adjustment steps that
require 6 V or -6 V
An adjustment step using the sine signal
failed
Ground the signal by pushing the lowerbezel button.
Is the grounding button on? When this is
active, you will not be able to make a channel
selection, so in some cases you might need
to temporarily deselect the grounding option
while you make a channel selection.
If you cannot find the termination settings,
click the CHANNEL SELECT lower-bezel
button.
Set the time marker to 1.6 ms. This will
automatically set the voltage to 625 Hz.
Select Multi-channel, and then turn on each
channel, one by one.
Follow the instructions for voltages >5.5 V
that appear in the D C Voltage setups. (See
page 13.)
Check the icon in the upper-left corner of the
calibrator screen to be sure that the polarity
is correct.
If the instrument fails an adjustment step, go
back to the first 6 V s tep (6 V on Channel 1)
and start the sequence again.
If the oscilloscope prompt specifies
Channel 4, try setting the signal to
Channel 5 instead.
MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 17
Adjustment Procedure
18 MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual
Maintenance
This section contains the information needed to do periodic and corrective
maintenance on the oscilloscope, as well as repackaging instructions for returning
the oscilloscope to Tektronix for service.
Preventing
ESD
Before servicing this product, read the General Safety Summary and the Service
Safety Summary at the front of the manual, and familiarize yourself with the
following
CAUTION. Static discharge can damage any semiconductor component in this
oscilloscope.
When per
adhere to the following precautions to avoid damaging internal modules and their
components due to electrostatic discharge.
1. Minimize handling of static-sensitive circuit boards and components.
2. Trans
3. Disc
4. Do not place anything capable of generating or holding a static charge on the
electrostatic discharge (ESD) information.
forming any service that requires internal access to the oscilloscope,
port and store static-sensitive modules in their static protected containers
or on a metal rail. Label any package that contains static-sensitive boards.
harge the static voltage from your body by wearing a grounded antistatic
wrist strap while handling these modules. Service static-sensitive modules
only at a static-free work station.
work station surface.
5. Handle circuit boards by the edges when possible.
6. Do
7. Avoid handling circuit boards in areas that have a floor or work-surface
not slide the circuit boards over any surface.
overing capable of generating a static charge.
c
Inspection and Cleaning
Inspection and cleaning are done as preventive maintenance. Preventive
maintenance, when done regularly, may prevent oscilloscope malfunction and
enhance its reliability.
Preventive maintenance consists of visually inspecting and cleaning the
oscilloscope and using general care when operating it.
MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 19
Maintenance
General Care
Flat Panel Display Cleaning
How often you do
which the oscilloscope is used. A proper time to perform preventive maintenance
is just before oscilloscope adjustment.
The cabinet h
place when operating the oscilloscope.
WARNING. To avoid injury, power off the instrument and disconnect it from line
voltage before performing any procedure that follows.
The display is a soft plastic display and must be treated with care during cleaning.
CAUTION.
display.
Avoid using abrasive cleaners or commercial glass cleaners to clean the display
surface.
Avoid spraying liquids directly on the display surface.
Avoid scrubbing the display with exces sive force.
Improper cleaning agents or methods can damage the flat panel
maintenance depends on the severity of the environment in
elps keep dust out of the oscilloscope and should normally be in
Exterior Cleaning
the flat panel display surface by gently rubbing the display with a
Clean
clean-room wipe (such as Wypall Medium Duty Wipes, #05701, available from
Kimberly-Clark Corporation).
If the display is very dirty, moisten the wipe with distilled water or a 75%
isopropyl alcohol solution and gently rub the display surface. Avoid using excess
force or you may damage the plastic display surface.
CAUTION. To prevent getting moisture inside the oscilloscope during external
eaning, use only enough liquid to dampen the cloth or applicator.
cl
Clean the exterior surfaces of the chassis with a dry lint-free cloth or a soft-bristle
rush. If any dirt remains, use a cloth or swab dipped in a 75% isopropyl alcohol
b
solution. Use a swab to clean narrow spaces around controls and connectors. Do
not use a brasive compounds on any part of the chassis that might damage the
chassis.
20 MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual
Maintenance
Clean the power
switch using a dampened cleaning towel. Do not spray or wet
the switch directly.
CAUTION. Avoid the use of chemical cleaning agents, which might damage the
plastics used in this oscilloscope. Use only deionized water when cleaning the
menu buttons or front-panel buttons. Use a 75% isopropyl alcohol solution as a
cleaner and rinse with deionized water. Before using any other type of cleaner,
r Tektronix Service Center or representative.
following table as a guide. Immediately repair defects that could cause
Exterior Inspection
consult you
Inspect the outside of the oscilloscope for damage, wear, and missing parts,
using the
personal injury or lead to further damage to the oscilloscope.
Table 1: External inspection checklist
Item Inspect for Repair action
Cabinet, front panel, and cover Cracks, scratches, deformations, damaged
hardware.
Front-panel knobs Missing, damaged, or loose k nobs.
Connectors
Carrying handle, and cabinet feet Correct operation. Repair or replace defective module.
Accessories
Broken shells, cracked insulation, and
deformed contacts. Dirt in connectors.
Missing items or parts of items, bent pins,
broken or frayed cables, and damaged
connectors.
Repair or replace defective module.
Repair or replace missing or defective
knobs.
Repair or replace defective modules. Clear
or wash out dirt.
Repair or replace damaged or missing
items, frayed cables, and defective modules.
Interior Inspection
To access the inside of the oscilloscope for cleaning and inspection, refer to the
exploded view diagrams. (See page 31, Replaceable Parts List.)
Inspect the internal portions of the oscilloscope for damage and wear, using the
following table as a guide. Repair any defects immediately.
If any circuit board is repaired or replaced, you must perform the Adjustments
Procedure. (See page 7, Adjustment Procedure.).
CAUTION. To prevent damage from electrical arcing, make sure that circuit
boards and components are dry before applying power to the oscilloscope.
Table 2: Internal inspection checklist
Item Inspect for Repair action
Circuit boards
Loose, broken, or corroded solder
connections. Burned circuit boards. Burned,
broken, or cracked circuit-run plating.
Remove and replace damaged circuit board.
MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 21
Maintenance
Table 2: Internal inspection checklist (cont.)
Item Inspect for Repair action
Resistors Burned, cracked, broken, blistered condition. Remove and replace damaged circuit board.
Solder connections Cold solder or rosin joints.
Capacitors Damaged or leaking cases. Corroded solder
on leads or terminals.
Wiring and cables Loose plugs or connectors. Burned, broken,
or frayed wiring.
Chassis Dents, deformations, and damaged
hardware.
Resolder joint and clean with isopropyl
alcohol.
Remove and replace damaged circuit board.
Firmly seat connectors. Repair or replace
modules with defective wires or cables.
Straighten, repair, or replace defective
hardware.
Interior Cleaning
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 rinsed with warm deionized water. (A
cotton-tipped applicator is useful for cleaning in narrow spaces and on circuit
boards.)
NOTE. If, after performing steps 1 and 2, a module is clean upon inspection,
skip the following steps.
If there is still dust or dirt on the module, the oscilloscope may be spray washed
using a solution of 75% isopropyl alcohol by following these steps:
a. Spray wash dirty parts with isopropyl alcohol and wait 60 seconds for the
majority of the alcohol to evaporate.
b. Use hot (120 °F to 140 °F) deionized water to thoroughly rinse them.
c. Dry all parts with low-pressure, deionized air.
d. Dry all components and assemblies inanovenordryingcompartment
using low-temperature (125 °F to 150 °F) circulating air.
Lubrication
There is no periodic lubrication required for this oscilloscope.
22 MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual
Module Removal
Maintenance
WAR N ING. Only qualified personnel should perform service procedures. Before
performing th
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. (See page 19, Preventing ESD.)
To work on the instrument, place it face down in its protective front cover. You
can remove the tabs from the cover if you want to make it easy to move the
instrument in and out of the cover while working on it.
is or any other procedure in this manual, read the General Safety
Required Equ ipmen t
e3: Removingtabsfromthefrontprotectivecover
Figur
move as assembly, refer to the module locator illustration. (See Figure 4
To r e
on page 24.)
can also refer to the exploded view diagrams and parts lists. (See page 31,
You
Replaceable Parts List.) The parts lists show how many of each type of screw is
used to attach each replaceable module.
If you are disassembling the instrument for cleaning, refer to the Inspection and
Cleaning procedure for instructions. (See page 19, Inspection and Cleaning.)
WAR N ING. Before doing any procedure in this subsection, disconnect the power
cord from the line voltage source. Failure to do so could cause serious injury
or death.
You will need a Torx-driver with a T-15 Torx tip to remove instrument screws.
MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 23
Maintenance
To Remove Modules
To remove a n y of
remove the rear cover and separate the front chassis from the rear chassis.
To r e m ove t he F
you must first remove the Main board assembly, the Analog board assembly,
and the front chassis.
To remove or install the keypad, do not touch the switch contacts with your
fingers. The oils on your fingers will degrade or damage the switch contacts.
To help prevent damage to the keypad, use cotton gloves when removing or
installing the keyboard pad.
the instrument modules or assemblies, you must first
ront Panel board assembly or the front panel case assembly,
Figure 4: Module locator
24 MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual
Troubleshooting
Maintenance
This section contains information and procedures to help you isolate a defective
module in the MSO4000B Series and DPO4000B Series oscilloscopes.
WAR N ING. Before performing this or any other procedure in this manual, read the
General Safety Summary and Service Safety Summary found at the beginning of
this manual
electrical components, read Preventing ESD. (See page 19, Preventing ESD.)
, and, to prevent possible injury to service personnel or damage to
Adjustment After Repair
Required Tools and
Equipment
Test Points
If you replac e any circuit board assembly, you must adjust the instrument after
repair. Refer to the Adjustment Procedures section for information about the
adjustment. (See page 7, Adjustment Procedure.)
You need the following equipment to troubleshoot the instrument.
Tools and Equipment Example
DMM 3.5 digits or above
Test points on the Main board are shown in the troubleshooting illustration. (See
Figure
Troubleshooting Procedure
The f
troubleshoot an instrument failure. Begin with the Primary troubleshooting
procedure flowchart. (See Figure 5.)
WAR N ING. Before removing the cabinet, disconnect the power cord from the line
voltage source. Failure to do so could cause serious injury or death.
6.)
ollowing figures are troubleshooting procedure flowcharts. Use them to
MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 25
Maintenance
Figure 5: Primary troubleshooting procedure
26 MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual
Maintenance
Figure 6: AC power supply troubleshooting procedure
NOTE. The test point voltages are printed on the Main board. From left to right in
the illustration, they are: +1.225 V, -1.2 V, -2.5 V, +1.5 V, -5 V, +12 V, +1.8 V,
+5 VA, +5 VSB, and +2.5 V, +3.3 V, +5 V.
MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 27
Maintenance
e 7: Module isolation troubleshooting procedure
Figur
28 MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual
Unpacking and Repacking Instructions
This section contains the information needed to u npack the oscilloscope and
repack it for shipment or storage.
Maintenance
Unpacking
Repacking
The oscilloscope and its standard accessories are carefully packed at the factory in
a shipping carton. If, upon receipt, damage to the shipping carton is evident, tell
the shipper. Tektronix, Inc. is not responsible for damage caused during shipping.
If you have not already done so, carefully remove the oscilloscope and its
accessories from the shipping carton and inspect them for damage. Save the
shipping carton for repacking or storage.
Use a corrugated cardboard shipping carton having a test strength of at least 275
pounds (125 kg) and with an inside dimension at least six inches (15.25 cm)
greater than the instrument dimensions.
If the instrument is being shipped to a Tektronix Service Center, enclose the
following information:
The owner’s address
Name and phone number of a contact person
Type and serial number of the instrument
on for returning
Reas
A complete description of the service required
torage
S
Seal the shipping carton with an industrial stapler or strapping tape.
Mark the address of the Tektronix Service Center and also your own return address
on the shipping carton in two prominent locations. See www.tektronix.com/service
to find a service center near you.
The oscilloscope should be stored in a clean, dry environment. The following
environmental characteristics apply for both shipping and storage:
Temperature range: –4 °F to +140 °F (–20 °C to +60 °C)
Altitude: To 30,000 feet (9144 m )
See the Tektronix MSO4000B and DPO4000B Series Digital Phosphor
Oscilloscopes Specifications and Performance Verification Technical Reference
for a complete listing of the environmental specifications.
MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 29
Maintenance
30 MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual
Replaceable Parts List
This chapter contains a list of the replaceable modules for the DPO4000B and
MSO4000B Series Oscilloscopes. Use this list to identify and order replacement
parts.
Parts Order
ing Information
Part Number Revision
Level
Replacement parts are available through your local Tektronix field office or
representative.
Changes to Tektronix products are sometimes made to accommodate improved
components as they become available and to give you the benefit of the latest
improvem
following information in your order.
If you order a part that has been replaced with a different or improved part, your
local Tektronix field office or representative will contact you concerning any
change in part number.
Change information, if any, is located at the rear of this manual.
Tektronix part numbers contain two digits that show the revision level of the
part. For some parts in this manual, you will find the letters XX in place of the
revision level number.
ents. Therefore, when ordering parts, it is important to include the
Part num
Instrument type or model number
Instrument serial number
Instrument modification number, if applicable
ber (see Part Number Revision Level below)
When you order parts, Tektronix will provide you with the most current part for
your product type, serial number, and modification (if applicable). At the time of
your order, Tektronix will determine the part number revision level needed for
your product, based on the information you provide.
Module Servicing
MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 31
Modules can be serviced by selecting one of the next three options. Contact your
local Tektronix service center or representative for repair assistance.
Replaceable Parts List
Module exchang
remanufactured module. These modules cost significantly less than new modules
and meet the same factory specifications. For more information about the module
exchange program, call 1-800-833-9200, extension 2.
Module repair and return. You may ship your module to us for repair, after which
we will retu
New modules. You may purchase replacement modules in the same way as other
replacement parts.
Using the Replaceable Parts List
This section contains a list of the mechanical and/or electrical components that
are replaceable for the instrument. Use this list to identify and order replacement
parts. The following table describes each column in the parts list.
Table 3
Column Colum n Name Description
1
2 Tektronix Part
3 and 4
5
6
: Parts list column descriptions
Figure & Index
Number
Number
Serial Number Column three indicates the serial number at which the part was first effective. Column four
Qty This indicates the quantity of parts used.
Name & Description An item name is separated from the description by a colon (:). Because of space limitations,
Items in this section are referenced by figure and index numbers to the exploded view
illustrations that precede the list.
Use this part number when ordering replacement parts from Tektronix.
cates the serial number at which the part w as discontinued. No entries indicates the
indi
part is good for all serial numbers.
an item name may sometimes appear as incomplete. Use the U.S. Federal Catalog handbook
-1 for further item name identification.
H6
e. In some cases you may exchange your module for a
rn it to you.
bbreviations conform to American National Standard ANSI Y1.1-1972.
Abbreviations
Exploded Views
A
Figures 5-1 through 5-8 on the following pages show the module-level exploded
views o f the DPO4000B Series and the MSO4000B Series oscilloscopes. Each
exploded view is indexed by the numbers in the figure.
32 MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual
Replaceable Parts List
Table 4: Repla c
Fig. &
index
number
eable parts – Front Panel assembly
Tektronix
part
number
Serial
no.
effective
Serial
no.
discont’d Qty Name & description
8- FRONT PANEL ASSEMBLY
-1
-2 366-0861-01 2
-3 366-0865-00 1
-4 366-0867-01 1
-5
-6 366-0860-01 6
-7
-8 260-2
-9 407-5259-00 1
-10 211-1273-00 19
1
-1
-12 407-2567-00 1
-13 260-2900-00 1
14
-
-15 131-8139–00 10
-16 200-5049-00 1
065-0854-01 1
065-0855-01 1
366-0859-0
335-2366-01 1
335-2367
335-2368-01 1
335-2369-01 1
335-237
335-2371-01 1
335-2372-01 1
335-23
335-2374-01 1
335-2375-01 1
26
70-0277-01
8
878-0744-00 1
1
-01
0-01
73-01
898-00
0-2858-00
FRONT CASE AS
FRONT CASE ASSEMBLY, DPO4000B SERIES
ASSEMBLY, KNOB: .925 DIAMETER, SOFT TOUCH
KNOB ASSEMB
KNOB ASSEMBLY, JOG
6
1
1
1
1
1
1
ASSEMBLY, KNOB: .470 DIAMETER, SOFT TOUCH
ASSEMBLY,
LABEL. FRONT PANEL, OVERLAY, FRENCH
LABEL. FRONT PANEL, OVERLAY, ITALIAN
LABEL. FR
LABEL. FRONT PANEL, OVERLAY, SPANISH
LABEL. FRONT PANEL, OVERLAY, JAPANESE
LABEL. F
LABEL. FRONT PANEL, OVERLAY, SIMPLIFIED CHINESE
LABEL. FRONT PANEL, OVERLAY, TRADITIONAL CHINESE
LABEL.
LABEL FRONT PANEL OVERLAY, RUSSIAN
SWITCH, KEYPAD, ELASTOMERIC, POWER
ET, SUPPORT: POWER SWITCH
BRACK
SCREW, MACHINE: 6–32 x 0.250, PNH, STL, ZNPL, T-15 TORX DRIVE
- - - - - - DISTRIBUTION OF THE 211-1273-00 SCREWS - - - - - -
ews attach the Power switch and bracket to the front case assembly.
2scr
2 screws attach the Utility switch and bracket to the front case assembly.
10 screws attach the Front panel assembly to the front case assembly – with contact
springs (#15).
5 screws across the bottom of the Front panel assembly attach it to the front case
assembly – without contact springs.
SWITCH, KEYPAD, ELASTOMERIC, UTILITY
ACKET, SUPPORT, UTILITY SWITCH
BR
SWITCH, KEYPAD, ELASTOMERIC, FRONT PANEL
CIRCUIT BOARD ASSEMBLY, FRONT PANEL (4 CHANNEL MODELS)
IRCUIT BOARD ASSEMBLY, FRONT PANEL (2 CHANNEL MODELS)
C
CONTACT, SPRING: FRONT PANEL ELEC
COVER; OPTION KEY DOOR, 0.7270 X 1.2250 X 0.310, PC/ABS, FR110, SILVER GRAY
SEMBLY, MSO4000B SERIES
LY, SHUTTLE AND BUSHING
KNOB: .685 DIAMETER, SOFT TOUCH
ONT PANEL, OVERLAY, GERMAN
RONT PANEL, OVERLAY, PORTUGUESE
FRONT PANEL, OVERLAY, KOREAN
MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 33
Replaceable Parts List
Figure 8: Exploded view, Front Panel assembly
34 MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual
Replaceable Parts List
Table 5: Replac
eable parts – Display, Analog board, and Main board
Figure
and
index
no.
Tektronix
part n o.
Serial
no.
effective
Serial
no.
discont’d Qty. Name and description
9-
-1 850-0110-00 1
-2 211-1272-00 40
-3 441-2608-00 1
-4 211-1273-00 8
-5
-6 131-6417-00 4
-7
-8
-9
-10 351-1134-00 1
-11 129-1693-00 1
131-6643-00 6
131-7622-00 1
-------
-------
DISPLAY, ANALOG BOARD & MAIN BOARD
FRAME ASSEMBLY, DISPLAY: LCD
SCREW, MACHINE: 6–32 x 0.250, PNH, STL, ZNPL, T-15 TORX DRIVE
------DISTRIBUTIONOFTHE211-1272-00SCREWS-------
6 screws attach the LCD assembly to the front chassis.
15 screws attach the Main board assembly to the front chassis.
6 screws attach the Analog board assembly to the front chassis.
12 screws attach the rear chassis to the front chassis: 4 across the top flange of the rear
chassis,2oneachsideflange, and 4 across the bottom flange of the front chassis.
1 screw attaches the ground jack to the front chassis.
CHASSIS ASSEMBLY, FRONT
SCREW, PT, K35–1.57, PAN HEAD, STL, ZNPL, T-15 TORX DRIVE
CONTACT, ELEC: GROUNDING, 0.169 L X 0.250 W X 0.320 D, ELECTROLESS
NICKEL PLATE
CONTACT, ELEC: GROUNDING, 0.600 L X 0.250 W X 0.220 D, ELECTROLESS NICKEL
PLATE
CONN, RECEPT; GROUND JACK
1
1
MAIN BOARD ASSEMBLY. Return the instrument to Tektronix for service. Must be
replaced with the ANALOG BOARD ASSEMBLY.
ANALOG BOARD ASSEMBLY. Return the instrument to Tektronix for service. Must be
replaced with the MAIN BOARD ASSEMBLY.
DIGITAL PROBE GUIDE (MSO models only)
SPACER, POST
MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 35
Replaceable Parts List
Figure 9: D isplay, Analog board, and Main board assembly
36 MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual
Replaceable Parts List
Table 6: Replac
eable parts – Rear chassis and connecting modules
Figure
and
index
no.
Tektronix
part no.
10-
-1 119-7597-00 1
-2 211-1272-00 15
-3 407-5462-00 1
-4 878-0278-01 1
-5
-6 441-2609-00 1
-7
-8 214-3903-00 2
-9 210-1039-00 2
-10 220-0265-00 2 NUT, PLAIN, HEX; 0.5-28 X 0.625
-11 065-0861-00 1
-12 335-1910-00 1
-13 335-2248-00 1
119-7086-00 1
131-6417-00 1
Serial
no.
effective
Serial
no.
discont’d Qty. Name and description
REAR CHASSIS, POWER SUPPLY, I/O BOARD
POWER SUPPLY; ROHS COMPLIANT; SAFETY CONTROLLED
SCREW, MACHINE: 6–32 x 0.250, PNH, STL, ZNPL, T-15 TORX DRIVE
------DISTRIBUTIONOFTHE211-1272-00SCREWS-------
1 screw attaches the I/O board to the rear chassis.
4 screws attach the Power supply circuit board to the Power supply bracket.
4 screws attach the Power supply bracket to the rear chassis.
2 screws attach the line filter to the rear chassis.
4 screws attach the system fan (#12) to the rear chassis.
BRACKET, POWER SUPPLY BOARD MOUNT
I/O BOARD ASSEMBLY
FILTER, EMI, AC LINE CONNECTOR
CHASSIS ASSEMBLY, REAR
CONTACT, ELEC: GROUNDING, 0.600 L X 0.250 W X 0.220 D, ELECTROLESS NICKEL
PLATE
SCREW, JACK; 4-40 X 0.312 LONG, 0.188 H HEX HEAD STAND OFF
WASHER, LOCK; 0.521 ID, INT, 0.025 THK, STEEL, ZINC FINISH
SYSTEM FAN ASSEMBLY, 120 MM, TUBEAXIAL, 12 VDC; SAFETY CONTROLLED,
WITH BRACKET
MARKER, IDENT: SERIAL NUMBER LABEL
LABEL, IO, REAR
MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 37
Replaceable Parts List
Figure 10: Rear chassis and connecting modules
38 MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual
Replaceable Parts List
Table 7: Replac
Figure
and
index
no.
eable parts – external parts
Serial
Tektronix
part no.
no.
effective
Serial
no.
discont’d Qty. Name and description
11-
-1 200-5130-00 1
-2 065-0856-00 1
-3 211-1272-00 4
EXTERNAL PARTS
FRONT PROTECTIVE COVER
REAR CASE ASSEMBLY
SCREW, MACHINE: 6–32 x 0.250, PNH, STL, ZNPL, T-15 TORX DRIVE
Figure 11: External parts
MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 39
Replaceable Parts List
Table 8: Replac
Figure
and
index
no.
eable parts – cable and connectors, rear chassis
Tektronix
part no.
Serial
no.
effective
Serial
no.
discont’d Qty. Name and description
12-
-1 174-5835-00 1
-2 343-1736-00 2
CABLES, REAR CHASSIS
CABLE ASSEMBLY, LINE INPUT
CLAMP, CABLE
Figure 12: Rear chassis, showing cables and connectors
40 MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual
Replaceable Parts List
Table 9: Rep lac
Figure
and
index
no.
eable parts – cable and connectors, Main board
Tektronix
part no.
Serial
no.
effective
Serial
no.
discont’d Qty. Name and description
13-
-1 174-5809-00 1
-2 346-0120-00 1
Cable, Main Board
CABLE, MAIN BOARD TO FRONT PANEL BOARD
STRAP, TIEDOWN; 5.5 L MIN, PLASTIC, WHITE
Figure 13: Main board, showing cable and connectors
MSO4000B and DPO4000B Series Digital Phosphor Oscilloscopes Service Manual 41
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