Tektronix TBS2104, TBS2102, TBS2074, TBS2072 Service Manual

xx
TBS2000 Series
ZZZ
Digital Storage Oscilloscopes
Service Manual
*P077115000*
077-1150-00
xx
TBS2000 Series
ZZZ
Digital Storage Oscilloscopes
Warning
The servicing instructions ar only. To avoid personal injury, do not perform any servicing unless you are qualied to do s before performing service.
e for use by qualied personnel
o. Refer to all safety summaries
www.tek.com
077-1150-00
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 covered by U.S. and foreign patents, issued and pending. Information in this publication supersedes that in all previously published material. Specications 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. Worldwide, visit www.tek.com to nd contacts in your area.

Table of Contents

Important safety information......... ................................ ................................ ............ iv
General safety summary ..................................................................................... iv
Service safety summary............ ................................ .................................. ....... v
Terms in this manual ................... ................................ .................................. ... vii
Symbols and terms on the product......................................................................... viii
Preface .............................................................................................................. ix
Manual conventions ................ ................................ ................................ .......... ix
Operating information
Operating information................................. ................................ ........................... 1-1
Theory of operation
Theory of operation .............................................................................................. 2-1
Power supply .............................. ................................ ................................ ... 2-2
Front End assembly (4 channel models) ..................... ................................ ............. 2-2
Main board ................................................................................................... 2-2
I/O board (4 channel models)............................................................................... 2-3
Front-panel board ............................................................................................ 2-3
ii
Adjustments
Adjustments ....................................................................................................... 3-1
Maintenance
Maintenance....................................................................................................... 4-1
Preventing ESD .............................................................................................. 4-1
Inspection and cleaning .............. ................................ ................................ ....... 4-1
Module removal.............................................................................................. 4-5
Troubleshooting....................... ................................ ................................ ....... 4-5
Troubleshooting procedure ................................................................................. 4-6
Unpacking and repacking instructions .................................................................. 4-10
Replaceable parts list
Replaceable parts list............................................................................................. 5-1
Parts ordering information.................................................................................. 5-1
Using the replaceable parts list............................................................................. 5-2
The replaceable parts list....................... ................................ ............................. 5-3
TBS2000 Series Service Manual i
Table of Contents
List of Figure
Figure 2-1: TBS2000 block diagram (2 channel) .................................. ........................... 2-1
Figure 2-2:
Figure 4-1: Primary troubleshooting procedure owchart ................................................... 4-7
Figure 4-2: AC Power Supply module troubleshooting..... ................................ ................. 4-8
Figure 4-3: Board isolation troubleshooting owchart....................................................... 4-9
Figure 5-1: Four channel models; front half.... .................................. ............................. 5-3
Figure 5-2: Four channel models; rear half... .................................. ............................... 5-5
Figure 5-
Figure 5-4: Two channel models; rear half ..... ................................ ............................... 5-9
TBS2000 block diagram (4 channel).................... ................................ ......... 2-1
3: Two channel models; front half ...................... .................................. ........... 5-7
s
ii TBS2000 Series Service Manual
List of Tables
Table 4-1: External inspection checklist....................................................................... 4-3
Table 4- 2 : I
Table 4-3: Most likely board to replace for failed diagnostics ......... ................................ ..... 4-9
Table 5-1: Four-channel model parts: front panel, display, and front chassis .... ......................... 5-4
Table 5-2: Four-channel model parts: inputs, main board, power supply, I/O, rear chassis, rear cover 5-6
Table 5-3: Two channel model parts; front panel, labels, front panel, LCD, chassis . .. . ... ... . .. . ... ... . 5-8
Table 5-4: Two channel model parts; power supply, main board, AC connector/lter, rear cover . . .. 5-10
nternal inspection checklist......................... .................................. ............. 4-4
Table of Contents
TBS2000 Series 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 vii, Service safety summary.)

General safety summary

Use the product only as specied. 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 specied in this manual.
The product is designed to be used by trained personnel only.
Only qualied 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 re 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 specied for this product and certied 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 difcult to operate the power cord; it must remain accessible to the user at all times to allow for quick disconnection if needed.
iv TBS2000 Series 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 re 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 oat 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 qualied service personnel.
Disable the product if it is damaged. Do not use the product if it is damaged 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 they 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 specied replacement parts.
Use proper fuse. Use only the fuse type and rating specied 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.
TBS2000 Series 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 ngers behind the nger 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,
The maximum oating voltage from the probe reference lead to earth ground
These two voltage ratings depend on the probe and your application. Refer to the Specications section of the manual for more information.
WARNING. To prevent ele ctrical shock, do not exceed the maximum measurement
maximum oating voltage for the oscilloscope input BNC connector, probe
or tip, or probe reference lead.
onnect and disconnect properly. Connect the probe output to the measurement
C
product before connecting the probe to the circuit under test. Connect the probe reference lead to the circuit under test before connecting the probe input. Disconnect the probe input and the probe reference lead from the circuit under test before disconnecting the probe from the measurement product.
Connect and disconnect properly. De-energize the circuit under test before connecting or disconnecting a current probe.
Connect the probe reference lead to earth ground only.
Do not connect a current probe to any wire that carries voltages above the current probe voltage rating.
vi TBS2000 Series Service Manual
Important safety information
Inspect the pro
for damage (cuts, tears, or defects in the probe body, access ories, or cable jacket). Do not use if damaged.

Servicesafetysummary

The Service safety summary section contains additional information required to safely perform service on the product. Only qualied personnel should perform service procedures. Read this Service 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 rst aid and resuscitation is present.
Disconnect power. To avoid electric shock, switch off the product power and 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 th test leads before removing protective panels, soldering, or replacing components.
be and accessories. Before each use, inspect probe and accessories
is product. Disconnect power, remove battery (if applicable), and disconnect
rms in this manual
Te
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
n injury or loss of life.
i
CAUTION. Caution statements identify conditions or practices that could result in
damage to this product or other property.
TBS2000 Series Service Manual vii
Important safety information
Symbols and te
rms on the product
These terms may appear on the product:
DANGER indicates an injury hazard immediately accessible as you read the marking.
WARNING indicates an injury hazard not immediately accessible as you read the marking.
CAUTION indicates a hazard to property including the product.
When this symbol is marked on the product, be sure to consult the manual to nd out the nature of the potential hazards and any actions which have to betakentoavoidthem.(Thissymbolmayalsobeusedtorefertheuserto ratings in the m anual.)
The follo
wing symbol(s) may appear on the product:
viii TBS2000 Series 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
ceable parts
Repla
Model Bandwidth
TBS2072
TBS2102
TBS2074
TBS2104
This manual uses certain conventions that you should become familiar with before
Throughout this manual, any replaceable component, assembly, or part is referred to by the term module.
This manual refers to any eld-replaceable assembly or mechanical part specifically by its name or generically as a replaceable part. In general, a replaceable part is any circuit board or assembly, such as the hard disk drive, or a mec parts list.
performing service.
hanical part, such as the I/O port connectors, that is listed in the replaceable
70 MHz 2
100 MHz 2
70 MHz 4
100 MHz 4
Channels
Safety
TBS2000 Series Service Manual ix
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.
Preface
x TBS2000 Series Service Manual

Operating information

Operating information

For information on installing and operating your oscilloscope, refer to the TBS2000 Series Digital Storage Oscilloscopes User Manual (Tektronix part number 077-1 from the Tektronix Web site (www.tek.com/downloads).
147-xx English; other languages available), which is downloadable
TBS2000 Series Service Manual 1–1
Operating information
1–2 TBS2000 Series Service Manual

Theory of operation

Theory of operation

This chapter describes the electrical operation of the oscilloscope to the module level. The block diagrams shows the oscilloscope module interconnections.
Figure 2-1: TBS2000 block diagram (2 channel)
Figure 2-2: TBS2000 block diagram (4 channel)
TBS2000 Series Service Manual 2–1
Theory of operation

Power supply

The Power Supply board converts AC line voltage to +12 V to power all internal circuits.

Front End assembly (4 channel models)

The Front End assembly begins with the analog signal path and ends with differential mode channel signals which are passed to the Main board. The analog inputs, attenuators, and preamps are contained in this assembly.

Main board

The Main boards contain the following functions:
Acquisition syste m
Trigger system
Display system
Processor sys tem
Power subsystem
The Acquisition system begins with the analog signal path and ends with a digitized signal in memory. The signal enters a channel input, and then passes through an attenuator and preamplier. The analog signal from each preamplier goes through a digitizer, and then into acquisition memory. The analog signal from each preamplier is also distributed to a trigger circuit.
The Trigger system digitizes the analog signals from the preampliers and routes the digitized signal to the Trigger circuit. Advanced trigger functions are enabled only when the appropriate application modules and supporting software are installed.
The Display system combines live waveform data from acquisition memory with menus and text, and stores this information in display memory. It then uses this data to refresh the XGA display module (LCD).
The Processor system contains an ARM microprocessor that controls the entire instrument. The processor system also contains FLASH ROM, system RAM, and interfaces to USB ports and the Ethernet port.
T he M a i n b o a r d co n v e r t s t h e +1 2 V p o w e r t o + 5 V, -5 V, +3 . 3 V, + 2 . 5 V, +2 V, +1.8 V, +1.5 V, +1.1 V, 1 V, and 0.75 V, used by circuitry throughout the system. The Front Panel board is powered on at all times when AC power is connected to the unit.
I/O ports (2 channel
models)
2–2 TBS2000 Series Service Manual
The Main board provides USB ports (Host and Device), an Ethernet port (LAN), and an Aux Out trigger output connections.
Theory of operation
I/O board (4 ch
annel models)

Front-panel board

The I/O board provides USB ports (Host and Device), an Ethernet port (LAN), and an Aux Out trigger output connections.
The Front Panel board contains a microprocessor that reads the front-panel buttons and contro and controls power to the Main board. The Front Panel board also generates the probe compensation output signal and c ontrols power to the Main board.
ls, sends this information to the processor system on the Main board,
TBS2000 Series Service Manual 2–3
Theory of operation
2–4 TBS2000 Series Service Manual

Adjustments

Adjustments

There are no customer-performable adjustment procedures (calibrations) for the TBS2000 Series oscilloscopes. Please return the instrument to Tektronix if adjustment is required. Calibrations can only be performed at a Tektronix service center and require the use of traceable test equipment (signal sources and measuring e
To determine if adjustment is required, use the Performance Verication procedure Performance Verication manual (tektronix part number 077-1148-xx), available at www.tek.com/downloads. Adjustment is also required after instrument repair.
quipment) to verify the performance of the instrument.
in the TBS2000 Series Digital Storage Oscilloscopes Specications and
TBS2000 Series Service Manual 3–1
Adjustments
3–2 TBS2000 Series Service Manual

Maintenance

Maintenance

This section contains the information needed to do periodic and corrective maintenance on the oscilloscope, and 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 oor 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.
TBS2000 Series Service Manual 4–1
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 excessive force.
Improper cleaning agents or methods can damage the at 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 at 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 brush. If any dirt remains, use a cloth or swab dipped in a 75% isopropyl alcohol solution. Use a swab to clean narrow spaces around controls and connectors. Do not use abrasive compounds on any part of the chassis that might damage the chassis.
4–2 TBS2000 Series 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.
arts, using the following table as a guide. Immediately repair defects
Exterior inspection
consult you
Inspect the external oscilloscope case, display, and controls for damage, wear, and missing p that could cause personal injury or lead to further damage to the oscilloscope.
Table 4-
Item Inspect for Repair action
Cabinet, front panel, and cover Cracks, scratches, deformations, damaged
Front-panel knobs Missing, damaged, or loose knobs.
Conne
Carrying handle, and cabinet feet Correct operation. Repair or replace defective module.
Acce
1: External inspection checklist
ctors
ssories
hardware.
Broken shells, cracked insulation, and
med contacts. Dirt in connectors.
defor
Missing items or parts of items, bent pins, broken or frayed cables, and damaged
nectors.
con
Repair or replace defective module.
Repair or replace missing or defective
.
knobs
r or replace defective modules. Clear
Repai or wash out dirt.
ir or replace damaged or missing
Repa items, frayed cables, and defective modules.
Interior inspection
access the inside of the oscilloscope for cleaning and inspection, refer to the
To exploded view diagrams. (See page 5-1, Replaceable parts list.)
nspect the internal portions of the oscilloscope for damage and wear, using the
I following table as a guide. Repair any defects immediately.
If any circuit board is repaired or replaced, adjustment is required. (See page 3-1, Adjustments.)
CAUTION. To prevent damage from electrical arcing, make sure that circuit
boards and components are dry before applying power to the oscilloscope.
TBS2000 Series Service Manual 4–3
Maintenance
Table 4-2: Inte
Item Inspect for Repair action
Circuit boards
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
Wiring and cables Loose plugs or connectors. Burned, broken,
Chassis Dents, deformations, and damaged
rnal inspection checklist
Interior cleaning
Loose, broken connections. Burned circuit boards. Burned, broken, or cracked circuit-run plating.
on leads or terminals.
or frayed wiring.
hardware
1. Blow off
, or corroded solder
.
dust with dry, low-pressure, deionized air (approximately 9 psi).
Remove and rep
Resolder joi alcohol.
Remove and r
Firmly seat connectors. Repair or replace modules with defective wires or cables.
Straighten, repair, or replace defective hardware
lace damaged circuit board.
nt and clean with isopropyl
eplace damaged circuit board.
.
2. Remove any remaining dust with a lint-free cloth dampened in isopropyl l (75% solution) and rinsed with warm deionized water. (A
alcoho cotton-tipped applicator is useful for cleaning in narrow spaces and on circuit boards.)
Lubrication
NOTE. If, after performing steps 1 and 2, a module is clean upon inspection,
skip the following steps.
If there is still dust o r 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.
ry all components and assemblies in an oven or drying compartment
d.D
using low-temperature (125 °F to 150 °F) circulating air.
There is no periodic lubrication required for this oscilloscope.
4–4 TBS2000 Series Service Manual

Module removal

Maintenance
WAR N ING. Only qualied personnel should perform se rvice procedures. Before
performing th Summary and Service Safety Summary located at the beginning of this manual. Also, to prevent possible injury to service personne l or damage to electrical components, read Preventing ESD. (See page 4-1, Preventing ESD.)
To remove an assembly, refer to the exploded view diagrams and parts lists. (See page 5-1, Replaceable parts list.)
If you are disassembling the instrument for cleaning, refer to the Inspection and Cleaning procedure for instructions. (See page 4-1, Inspection and cleaning .)
WAR N ING. Disconnect the power cord from the line voltage source. Failure to do
so could cause serious injury or death.
is or any other procedure in this manual, read the General Safety
Required equipment
To rem
ove modules

Troubleshooting

You will need Torx drivers with a T-15 and T-10 Torx tip to remove instrument screws.
To remove any of the instrument modules or assemblies, you must rst remove the rear cover and separate the front chassis from the rear chassis.
To remove the Front Panel board assembly or the front panel case assembly, you must rst remove the Main board assembly and the front chassis.
To remove or install the keypad, do not touch the switch contacts with your ngers. The oils on your ngers will degrade or damage the switch contacts. To help prevent damage to the keypad, use cotton gloves when removing or
stalling the keyboard pad.
in
This section contains information and procedures to help you isolate a defective module in the TBS2000 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, and, to prevent possible injury to service personnel or damage to electrical components, read Preventing ESD. (See page 4-1, Preventing ESD.)
TBS2000 Series Service Manual 4–5
Maintenance
Adjustment after repair
Required tools and
equipment
Instrument adj the Front End assembly (4 channel models). Refer to the Adjustments section for information about the adjustment. (See page 3-1, Adjustments.)
You need the f
Tools and equ
DMM 3.5 digits or above

Troubleshooting procedure

Use the fol the Primary troubleshooting owchart.
WARNING. Before removing the cabinet, disconnect the power cord from the line
voltage source. Failure to do so could cause serious injury or death.
CAUTION. When you operate the four-channel instrument with the cabinet
removed, the system fan will not cool the instrument. You must p rovide an external fan to cool the interior of the instrument. Failure to do so could cause instrument damage.
ustment is required after you replace the Main board (all models) or
ollowing equipment to troubleshoot the instrument.
ipment
lowing owcharts to troubleshoot an instrument failure. Begin with
Example
4–6 TBS2000 Series Service Manual
Maintenance
Primary troubl
eshooting
owchart
Figure 4-1: Primary troubleshooting procedure owchart
TBS2000 Series Service Manual 4–7
Maintenance
AC Power Supply
module
troubleshooting owchart
Figure 4-2: AC Power Supply module troubleshooting
NOTE. Images show the power supply cable disconnected from the main board, to
better show the test point locations. The power cable from the Power Supply must be connected to the Main board to test the +12 VDC value.
4–8 TBS2000 Series Service Manual
Maintenance
Board isolatio
troubleshooting owchart
n
Figure 4-3: Board isolation troubleshooting owchart
Table 4-3: Most likely board to replace for failed diagnostics
Failed test Most likely board
CPU
Display Main
sition
Acqui
ROM
t Panel
Fron
I/O Mai
Main
Main (or Front End board on 4-channel models)
Main
t Panel or Main
Fron
n (or I/O board on 4-channel models)
TBS2000 Series Service Manual 4–9
Maintenance

Unpacking and repacking instructions

This section contains the information needed to unpack the oscilloscope and repack it for shipment or storage.
Unpacking
Repacking
The oscilloscope and its standard accessories are c arefully 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 nd 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:
Temperaturerange: -4°Fto+140°F(-20°Cto+60°C)
Altitude: To 39,370 feet (12,000 m )
See the Tektronix TBS2000 Series Digital Storage Oscilloscopes Specications and Performance Verication Technical Reference (Tektronix part number 077-1148-xx) for a complete listing of the environmental specications.
4–10 TBS2000 Series Service Manual

Replaceable parts list

Replaceable parts list

This chapter contains a list of the replaceable modules for these oscilloscopes. Use this list to identify and order replacement parts.

Parts ordering information

Replacement parts are available through your local Tektronix eld ofce or representative.
Changes to Tektronix products are sometimes made to accommodate improved components as they become available and to give you the benet of the latest improvements. Therefore, when ordering parts, it is important to include the following information in your order:
Part number (see Part Number Revision Level below)
Instrument type or model number
Instrument serial number
Instrument modication number, if applicable
If you order a part that is replaced with a different or improved part, your local Tektronix eld ofce or representative will contact you concerning any change in part number.
Part number revision level
Module servicing
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 nd the letters “xx” in place of the revision level number.
When you order parts, Tektronix will provide you with the most current part for your product type, serial number, and modication (if applicable). At the time of your order, Tektronix will determine the part number revision level needed for your product, based on the information you provide.
Modules can be serviced by selecting one of the next three options. Contact your local Tektronix service center or representative for repair assistance.
Module exchange. In some cases you may exchange your module for a remanufactured module. These modules cost signicantly less than new modules
TBS2000 Series Service Manual 5–1
Replaceable parts list
and meet the sam 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 return it to you.
New modules
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.
Parts list column descriptions
Column Column n
1
2Tektr
3 and 4
5
6
Figure Number
Number
Serial Number Column three indicates the serial number at which the part was rst effective. Column four
Qty This
Nam
ame
& Index
onix Part
e & Description
tion
Descrip
n this section are referenced by gure and index numbers to the exploded view
Items i illustrations.
Use this part number when ordering replacement parts from Tektronix.
indicates the serial number at which the part was discontinued. No entries indicates the
is good for all serial numbers.
part
indicates the quantity of parts used.
tem name is s eparated from the description by a colon (:). Because of space limitations,
An i an item name may sometimes appear as incomplete. Use the U.S. Federal Catalog handbook H6-1 for further item name identication.
efactoryspecifications. For more information about the module
. You may purchase replacement modules similarly as other
Abbreviations
Exploded views
Abbreviations conform to American National Standard ANSI Y1.1-1972.
The illustrations in this section show the module-level exploded views of the
scilloscopes. Each exploded view is indexed by the numbers in the gure. The
o table of index numbers and part numbers corresponding to a picture are in the table immediately proceeding the illustration.
5–2 TBS2000 Series Service Manual

The replaceable parts list

Replaceable parts list
Figure 5-1: Four channel models; front half
TBS2000 Series Service Manual 5–3
Replaceable parts list
Table 5-1: Four
Fig. & index number
5-1-1
-2 202-0522-xx 1
-3 260-3035-xx 1
-4 878-1179-xx 1
-5
-6 211-1273-xx 22
-7
-8 407-5760-xx 1
-9 441-2848-xx 1
-10 211-1272-xx 43
-11 131-6643-xx 6
-12 174-5411-xx 1
-13 174-6623-xx 1
-14 878-1172-xx 1
-15 260-3035-xx 1
-16 174-6696-xx 1
-17
-18 366-0935-xx
-19 366-0934-xx 6
-20 366-0936-xx 1
-21 335-3429-xx 1
1
Quantity indicated is for the entire instrument, not necessarily for each image.
2
Tightening torque for 211-1272-xx and 211-1273-xx is 0.9 N*M
-channel model parts: front panel, display, and front chassis
Tektronix part number
335-3552-xx 1
335-3553-xx 1
131-8139-xx 8
850-0312-xx 1
335-3428-xx 1
335-3728-xx 1
335-3744-xx 1
335-3745-xx 1
335-3746-xx 1
335-3747-xx 1
335-3748-xx 1
335-3749-xx 1
335-3750-xx 1
335-3751-xx 1
335-3752-xx 1
Serial no. effective
Serial no. discont’d Qty
5
1
2
2
Name & description
LABEL, BLACK FRAME-B4 9 INCH DISPLAY, TBS2074, SAFETY CONTROLLED
LABEL, BLACK FRAME-B4 9 INCH DISPLAY, TBS2104, SAFETY CONTROLLED
FRONT CASE
SWITCH, KEYPAD, ELASTOMERIC POWER; SAFETY CONTROLLED
CIRCUIT BOARD ASSY; POWER SWITCH BOARD
CONTACT, SPRING; FRONT PANEL ELEC
SCREW, PT; K35-1.57, PAN HEAD, STL, ZNPL, T-15
FRAME ASSEMBLY; DISPLAY; TBS2K
BRACKET, DISPLAY MOUNT
CHASSIS, FRONT
SCREW, MACHINE; 6-32 X 0.250, PNH, STL, ZNPL,T-15 TORX DR
CONTACT, ELECTRICAL
CABLE EXTENSION, USB-HOST
CABLE, DISPLAY, FFC, 50POS
PCB, FRONT-PANEL
SWITCH, KEYPAD, ASSEMBLY FRONT
CABLE CONNECTION, FRONT-PANEL & POWER SWITCH
MARKER, IDENTIFICATION LABEL, SAFETY CONTROLLED
MARKER, IDENTIFICATION FRONT PANEL OVERLAY, KOREAN
MARKER, IDENTIFICATION FRONT PANEL OVERLAY, FRENCH
MARKER, IDENTIFICATION FRONT PANEL OVERLAY, RUSSIAN
MARKER, IDENTIFICATION FRONT PANEL OVERLAY, ITALIAN
MARKER, IDENTIFICATION FRONT PANEL OVERLAY, GERMAN
MARKER, IDENTIFICATION FRONT PANEL OVERLAY, SPANISH
MARKER, IDENTIFICATION FRONT PANEL OVERLAY, JAPANESE
MARKER, IDENTIFICATION FRONT PANEL OVERLAY, PORTUGUESE
MARKER, IDENTIFICATION FRONT PANEL OVERLAY, SIMPLE CHINESE
MARKER, IDENTIFICATION FRONT PANEL OVERLAY, STANDARD CHINESE
ASSEMBLY, KNOB; .685 DIAMETER
ASSEMBLY, KNOB; .470 DIAMETER
ASSEMBLY, KNOB; .925 DIAMETER
MARKER, IDENTIFICATION LABEL, SAFETY CONTROLLED
5–4 TBS2000 Series Service Manual
Replaceable parts list
Figure 5-2: Four channel models; rear half
TBS2000 Series Service Manual 5–5
Replaceable parts list
Table 5-2: Four
Fig. & index number
5-2-1 174-6877-xx 1
-2 211-1272-xx 43
-3 119-8488-xx 1
-4 174-6699-xx 1
-5
-6 174-6286-xx 1
-7
-8 441-2847-xx 1
-9 119-7086-xx 1
-10 211-0718-xx 2
-11 202-0544-xx 1
-12 367-0598-xx 1
-13 214-5148-xx 2
-14 348-1909-xx 2
-15 348-2222-xx 2
-16 335-3427-xx 1
-17 348-2082-xx 4
-18 119-8751-xx 1
-19 878-1137-xx 1
-20 870-1169-xx 1
-21 129-1693-xx 1
-22 878-1139-xx 1
-23 210-1039-xx 4
-24 220-0265-xx 4
-N/A
1
antity indicated is for the entire instrument, not necessarily for items in each image.
Qu
2
Tightening torque for 211-1272-xx and 211-1273-xx is 0.9 N*M.
3
Tightening torque for 129-1693-xx is 1.13 N*M.
4
Tightening torque for 220-0265-xx is 4.52N*M, ±0.23 N*M.
5
Tektronix option TEKUSBWIFI.
-channel model parts: inputs, main board, power supply, I/O, rear chassis, rear cover
Serial Tektronix part number
146-0148-xx 1
131-6643-xx 2
119-8771-xx 1
no.
effective
Serial no. discont’d Qty
1
2
3
4
5
Name & description
CABLE POWER SUPPLY WITH MAIN BOARD, SAFETY CONTROLLED
SCREW, MACHINE; 6-32 X 0.250, PNH, STL, ZNPL, T-15 TORX DR
POWER SUPPLY; AC-DC, INTERNAL; 90-264 VAC 47-63 HZ, 103-127 VAC 360-440 HZ IN; +12V 5A4, 65W OUT; SAFETY CONTROLLED
CABLE CONNECTION, FRONT-PANEL & MAIN BOARD
BATTERY, DRY: 3 VOLT, 150MAH, LITHIUM, LEADED BUTTON CELL, SAFETY CONTROLLED
CABLE ASSEMBLY (LINE INPUT), SAFETY CONTROLLED
CONTACT, ELECTRICAL
CHASSIS; REAR, SAFETY CONTROLLED
FILTER, EMI; AC LINE CONNECTOR/INPUT FILTER; 6.0A, 120-250VAC, DC-400 HZ
SCREW, MACHINE; 6-32 X 0.312, FLH100, STEEL, ZINC FINISH, T-10 TORX DR
CASE, REAR, SAFETY CONTROLLED
HANDLE, CARRYING OVERMOLDED, SAFETY CONTROLLED
SPRING FRONT FOOT
FOOT REAR
FOOT, FRONT CABINET, HINGED
LABEL, IO (REAR)
GROMMET, FAN MOUNT, NOISE DAMPING
FAN, TUBE AXIAL (92MM, DC, ASSEMBLY)
CIRCUIT BOARD (IO BOARD)
CIRCUIT BOARD MAIN BOARD
SCREW, JACK, 433H, 6-32 INTERNAL, 8-32 EXTERNAL
CIRCUIT BOARD ASSY, ANALOG FRONT END BOARD,
WASHER, LOCK INTERNAL TOOTH
NUT, PLAIN, HEX; 0.5-28 X 0.625 HEX, BRS, NKL PL
WIFI USB DONGLE FOR TBS
5–6 TBS2000 Series Service Manual
Replaceable parts list
Figure 5-3: Two channel models; front half
TBS2000 Series Service Manual 5–7
Replaceable parts list
Table 5-3: Two c
Fig. & index number
5-3-1
-2 202-0527-xx 1
-3 850-0312-xx 1
-4 407-5760-xx 1
-5
-6 211-1273-xx 22
-7
-8 174-6941-xx 1
-9 174-5411-xx 1
-10 131-8139-xx
-11 878-1161-xx 1
-12 260-3038-xx 1
-13
-14 366-0935-xx 3
-15 366-0934-xx 4
-16 366-0936-xx 1
1
Quantity indicated is for the entire instrument, not necessarily for items in each image.
2
Tightening torque for 211-1272-xx and 211-1273-xx is 0.9 N*M.
hannel model parts; front panel, labels, front panel, LCD, chassis
Tektronix part number
335-3550-xx 1
335-3546-xx 1
441-2844-xx 1
211-1272-xx 43
335-3473-xx 1
335-3729-xx 1
335-3730-xx 1
335-3731-xx 1
335-3732-xx 1
335-3733-xx 1
335-3734-xx 1
335-3735-xx 1
335-3736-xx 1
335-3737-xx 1
335-3738-xx 1
Serial
no.
effective
Serial no. discont’d Qty
7
1
Name & description
LABEL, BLACK FRAME-B2 9 INCH DISPLAY, TBS2102, SAFETY CONTROLLED
LABEL, BLACK FRAME-B2 9 INCH DISPLAY, TBS2072, SAFETY CONTROLLED
B2 FRONT CASE SAFETY CONTROLLED
FRAME ASSEMBLY; DISPLAY; TBS2K
BRACKET, DISPLAY MOUNT
CHASSIS, MAIN, SAFETY CONTROLLED
2
2
SCREW,PT; K35-1.57, PAN HEAD, STL, ZNPL, T-15
SCREW, MACHINE; 6-32 X 0.250, PNH, STL, ZNPL, T-15 TORX DR
CABLE, DISPLAY, FFC, 50POS
CABLE EXTENSION, USB-HOST
CONTACT, SPRING; FRONT PANEL ELEC
FRONT PANEL B2 BOARD
SWITCH, KEYPAD, ELASTOMERIC FRONT PANEL
MARKER, IDENTIFICATION LABEL FRONT PANEL, 2CH, SA, SAFETY CONTROLLED
MARKER, IDENTIFICATION FRONT PANEL OVERLAY, FRENCH
MARKER, IDENTIFICATION FRONT PANEL OVERLAY, RUSSIAN
MARKER, IDENTIFICATION FRONT PANEL OVERLAY, ITALIAN
MARKER, IDENTIFICATION FRONT PANEL OVERLAY, GERMANY
MARKER, IDENTIFICATION FRONT PANEL OVERLAY, SPANISH
MARKER, IDENTIFICATION FRONT PANEL OVERLAY, JAPANESE
MARKER, IDENTIFICATION FRONT PANEL OVERLAY, PORTUGUESE
MARKER, IDENTIFICATION FRONT PANEL OVERLAY, SIMPLE CHINESE
MARKER, IDENTIFICATION FRONT PANEL OVERLAY, STANDARD CHINESE
MARKER, IDENTIFICATION FRONT PANEL OVERLAY, KOREAN
ASSEMBLY, KNOB; .685 IN DIAMETER
ASSEMBLY, KNOB; .470 IN DIAMETER
ASSEMBLY, KNOB; .925 IN DIAMETER
5–8 TBS2000 Series Service Manual
Replaceable parts list
Figure 5-4: Two channel models; rear half
TBS2000 Series Service Manual 5–9
Replaceable parts list
Table 5-4: Two c
Fig. & index number
5-4-1 1198-488-xx 1
-2 211-1272-xx 43
-3 174-6877-xx 1
-4 174-6920-xx 1
-5
-6 119-7086-xx 1
-7
-8 202-0528-xx 1
-9 367-0598-xx 1
-10 348-1909-xx 2
-11 348-2209-xx 2
-12 214-5148-xx 2
-13 131-6643-xx 4
-14 220-0265-xx 3
-15 210-1039-xx 3
-16 407-5915-xx 1
-17 211-1273-xx 6
-18 870-1175-xx 1
-19 174-6699-xx 1
-20 253-0571-xx 1
-21 253-0570-xx 1
-22 146-0148-xx 1
-N/A
1
ntity indicated is for the entire instrument , not necessarily for each image.
Qua
2
Tightening torque for 211-1272-xx and 211-1273-xx is 0.9 N*M.
3
Tightening torque for 220-0265-xx is 4.52N*M, ±0.23 N*M.
4
Tektronix option TEKUSBWIFI.
hannel model parts; power s upply, main board, AC c onnector/lter, rear cover
Serial Tektronix part number
407-5916-xx 1
211-0718-xx 2
119-8771-xx 1
no.
effective
Serial no. discont’d Qty
1
Name & description
POWER SUPPLY; AC-DC, INTERNAL; 90-264 VAC 47-63 HZ, 103-127 VAC, 360-440 HZ IN; +12V 5A4, 65W OUT; SAFETY CONTROLLED
2
3
4
SCREW, MACHINE; 6-32 X 0.250, PNH, STL, ZNPL, T-15 TORX DR
CABLE POWER SUPPLY WITH MAIN BOARD, SAFETY CONTROLLED
CABLE ASSEMBLY (LINE INPUT), SAFETY CONTROLLED
BRACKET, FILTER, SAFETY CONTROLLED
FILTER, EMI; AC LINE CONNECTOR/INPUT FILTER; 6.0A, 120-250 VAC, DC-400 HZ
SCREW, MACHINE; 6-32 X 0.312, FLH100, STEEL, ZINC FINISH, T-10 TORX DR
CASE, REAR, SAFETY CONTROLLED
HANDLE, CARRYING OVERMOLDED, SAFETY CONTROLLED
FOOT REAR; SAFETY CONTROLLED
FOOT, FRONT CABINET, HINGED, SAFETY CONTROLLED
SPRING FRONT FOOT
CONTACT, ELECTRICAL
NUT, PLAIN, HEX; 0.5-28 X 0.625 HEX, BRS, NKL PL
WASHER, LOCK INTERNAL TOOTH
BRACKET, REAR BNC IN MAIN BOARD
SCREW, PT; K35-1.57, PAN HEAD, STL, ZNPL, T-15
CIRCUIT BOARD ASSY; MAIN B2 BOARD
CABLE CONNECTION, FRONT- PANEL & MAIN BOARD
THERMAL INTERFACE MATERIAL SQUARE, 27X27MM
THERMAL INTERFACE MATERIAL SQUARE, 15X15MM
BATTERY, DRY: 3 VOLT, 150MAH, LITHIUM, LEADED BUTTON CELL, SAFETY CONTROLLED
WIFI USB DONGLE FOR TBS
5–10 TBS2000 Series Service Manual
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