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Instruction Manual
TDS Family
Option 05 Video Trigger Interface
070-8748-02
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.
Page 2
Copyright T ektronix, Inc. All rights reserved.
T ektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes
that in all previously published material. Specifications and price change privileges reserved.
Printed in the U.S.A.
T ektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070–1000
TEKTRONIX and TEK are registered trademarks of T ektronix, Inc.
Page 3
WARRANTY
T ektronix warrants that the products that it manufactures and sells will be free from defects in materials and workmanship
for a period of three (3) years from the date of shipment. If a product proves defective during this warranty period,
T ektronix, at its option, either will repair the defective product without charge for parts and labor, or will provide a
replacement in exchange for the defective product.
In order to obtain service under this warranty, Customer must notify Tektronix of the defect before the expiration of the
warranty period and make suitable arrangements for the performance of service. Customer shall be responsible for
packaging and shipping the defective product to the service center designated by T ektronix, with shipping charges prepaid.
T ektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the
T ektronix service center is located. Customer shall be responsible for paying all shipping charges, duties, taxes, and any
other charges for products returned to any other locations.
This warranty shall not apply to any defect, failure or damage caused by improper use or improper or inadequate
maintenance and care. T ektronix shall not be obligated to furnish service under this warranty a) to repair damage resulting
from attempts by personnel other than T ektronix representatives to install, repair or service the product; b) to repair
damage resulting from improper use or connection to incompatible equipment; c) to repair any damage or malfunction
caused by the use of non-T ektronix supplies; or d) to service a product that has been modified or integrated with other
products when the effect of such modification or integration increases the time or difficulty of servicing the product.
THIS WARRANTY IS GIVEN BY TEKTRONIX IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR
IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PAR TICULAR PURPOSE. TEKTRONIX’ RESPONSIBILITY TO
REP AIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO
THE CUSTOMER FOR BREACH OF THIS WARRANTY. TEKTRONIX AND ITS VENDORS WILL NOT BE
LIABLE FOR ANY INDIRECT , SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES IRRESPECTIVE
OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH
DAMAGES.
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Page 5
Table of Contents
Operating Information
Service Information
General Safety Summary iii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Safety Summary v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preface vii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Related Manuals vii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Information 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Before You Begin 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Information 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Before Servicing 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Strategy for Servicing 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preventing Electrostatic Discharge (ESD) 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnostics 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal and Replacement Procedures 2–5. . . . . . . . . . . . . . . . . . . . . . . . .
Before You Begin 2–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Cover and Cabinet Removal 2–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Circuit Board Removal 2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Circuit Board Replacement 2–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replace Cabinet and Rear Cover 2–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Execute Diagnostics 2–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replaceable Parts 2–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Ordering Information 2–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using the Replaceable Parts List 2–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TDS Family Option 05 Instruction Manual
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Table of Contents
List of Figures
Figure 1–1: Main Trigger Menu — Video Type 1–2. . . . . . . . . . . . . . . . . .
Figure 1–2: Video Trigger Menu — Standard 1–3. . . . . . . . . . . . . . . . . . .
Figure 1–3: Main Trigger Menu — Field 1–4. . . . . . . . . . . . . . . . . . . . . . .
Figure 1–4: Video Trigger Menu — PAL Mode 1–5. . . . . . . . . . . . . . . . . .
Figure 1–5: Video Trigger Menu — HDTV Format 1–6. . . . . . . . . . . . . .
Figure 1–6: FlexFormat V1 Start, V1 Stop, V2 Start and
V2 Stop Times 1–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1–7: Cursor Menu — Video Line Number 1–8. . . . . . . . . . . . . . . .
Figure 1–8: Display Menu — NTSC Graticule 1–9. . . . . . . . . . . . . . . . . . .
Figure 1–9: Display Menu — PAL Graticule 1–10. . . . . . . . . . . . . . . . . . . .
Figure 2–1: Troubleshooting Tree 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–2: Rear Cover and Cabinet Removal 2–6. . . . . . . . . . . . . . . . . .
Figure 2–3: Circuit Board Installed 2–7. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–4: Pull Out A23 SerPar Circuit Board Assembly 2–8. . . . . . . . .
Figure 2–5: Proper Routing of the Video Cable 2–9. . . . . . . . . . . . . . . . . .
Figure 2–6: Circuit Board Removal 2–10. . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–7: Video Trigger Replaceable Parts 2–17. . . . . . . . . . . . . . . . . . . .
ii
TDS Family Option 05 Instruction Manual
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General Safety Summary
Review the following safety precautions to avoid injury and prevent damage to
this product or any products connected to it. To avoid potential hazards, use this
product only as specified.
Only qualified personnel should perform service procedures.
To Avoid Fire or
Personal Injury
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 avoid fire or shock hazard, observe all ratings
and markings on the product. Consult the product manual for further ratings
information before making connections to the product.
The common terminal is at ground potential. Do not connect the common
terminal to elevated voltages.
Do not apply a potential to any terminal, including the common terminal, that
exceeds the maximum rating of that terminal.
Do Not Operate Without Covers. Do not operate this product with covers or panels
removed.
Use Proper Fuse. Use only the fuse type and rating specified for this product.
Avoid Exposed Circuitry. Do not touch exposed connections and components
when power is present.
Do Not Operate With Suspected Failures. If you suspect there is damage to this
product, have it inspected by qualified service personnel.
Provide Proper Ventilation. Refer to the manual’s installation instructions for
details on installing the product so it has proper ventilation.
TDS Family Option 05 Instruction Manual
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General Safety Summary
Symbols and Terms
T erms in this Manual. These terms may appear in this manual:
WARNING. Warning statements identify conditions or practices that could result
in injury or loss of life.
CAUTION. Caution statements identify conditions or practices that could result in
damage to this product or other property.
T erms 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.
Symbols on the Product. The following symbols may appear on the product:
WARNING
High Voltage
Protective Ground
(Earth) T erminal
CAUTION
Refer to Manual
Double
Insulated
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TDS Family Option 05 Instruction Manual
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Service Safety Summary
Only qualified personnel should perform service procedures. Read this Service
Safety Summary and the General Safety Summary before performing any service
procedures.
Do Not Service Alone. Do not perform internal service or adjustments of this
product unless another person capable of rendering first aid and resuscitation is
present.
Disconnect Power. To avoid electric shock, disconnect the mains power by means
of the power cord or, if provided, the power switch.
Use Caution When Servicing the CRT. To avoid electric shock or injury, use
extreme caution when handling the CRT. Only qualified personnel familiar with
CRT servicing procedures and precautions should remove or install the CRT.
CRTs retain hazardous voltages for long periods of time after power is turned off.
Before attempting any servicing, discharge the CRT by shorting the anode to
chassis ground. When discharging the CRT, connect the discharge path to ground
and then the anode. Rough handling may cause the CRT to implode. Do not nick
or scratch the glass or subject it to undue pressure when removing or installing it.
When handling the CRT, wear safety goggles and heavy gloves for protection.
Use Care When Servicing With Power On. Dangerous voltages or currents may
exist in this product. Disconnect power, remove battery (if applicable), and
disconnect test leads before removing protective panels, soldering, or replacing
components.
To avoid electric shock, do not touch exposed connections.
X-Radiation. To avoid x-radiation exposure, do not modify or otherwise alter the
high-voltage circuitry or the CRT enclosure. X-ray emissions generated within
this product have been sufficiently shielded.
TDS Family Option 05 Instruction Manual
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Service Safety Summary
vi
TDS Family Option 05 Instruction Manual
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Preface
Related Manuals
This instruction manual provides operating and service information for the TDS
Family Option 05, Video Trigger. The following sections are included in this
manual:
Related Manuals (follows this introduction).
Operating Information provides a product description and operating
procedures for using the Video Trigger capabilities.
Service contains module-level service information including a troubleshoot-
ing tree, removal and replacement instructions, and a replaceable parts list.
Other documentation for the TDS Family of digitizing oscilloscopes includes the
following:
The user manual guides the user in operation of the oscilloscope and
describes its features. It also contains tutorials and other useful information.
The programmer manual describes how to use a computer to control the
oscilloscope through the GPIB interface. This includes command descriptions for programming the Video Trigger capabilities.
The reference gives you a quick overview of how to operate these oscillo-
scopes.
The performance verification tells how to verify the performance of the
oscilloscopes.
The service manual provides information for maintaining and servicing the
oscilloscope.
TDS Family Option 05 Instruction Manual
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Preface
viii
TDS Family Option 05 Instruction Manual
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Operating Information
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Operating Information
The Option 05 Video Trigger gives you a variety of tools for investigating events
that occur when a video signal generates a horizontal or vertical sync pulse.
It allows you to investigate a range of NTSC, PAL, SECAM and high definition
TV signals.
To make this option work, you must have both the Video Trigger hardware and
firmware installed on the oscilloscope.
Before You Begin
To ensure the video trigger feature is working properly, execute the internal
diagnostic routine by doing the following steps:
1. Power on the digitizing oscilloscope.
The oscilloscope automatically executes a short internal diagnostic routine
that checks oscilloscope functions. When finished, the oscilloscope displays
an on-screen report of any failed modules or features.
Operation
2. If the video trigger feature fails, refer to the Troubleshooting procedures
starting on page 2–3.
3. If no failures are reported, go to Operation.
The Video Trigger menu lets you select the source, polarity, class, and mode. It
also gives you the option to delay by lines or time and lets you choose the field
to trigger on.
To bring up the Video Trigger menu:
1. Press the TRIGGER MENU button to bring up the Main Trigger menu.
2. Press Type in the main menu until you select Video from the pop-up menu
(see Figure 1–1).
TDS Family Option 05 Instruction Manual
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Operating Information
Video Standard
Figure 1–1: Main Trigger Menu — Video Type
Using the Standard pop-up, you can select to use predefined setups (NTSC,
PAL, or HDTV) or select to customize the setup (FlexFormat).
1. Press the main menu Standard button until you select the desired setup (see
Figure 1–2).
NTSC has 525 lines per frame and a field rate of 59.94 Hz. for color and
60 Hz. for monochrome.
PAL has 625 lines per frame and a field rate of 50 Hz.
HDTV (high definition TV) covers 787.5/60, 1050/60, 1125/60 and
1250/60 formats.
FlexFormat lets you customize the TDS video trigger for an array of TV
formats. You can use various menus items to specify the number of lines
and fields, line rate, sync pulse width, and vertical interval timing.
1–2
TDS Family Option 05 Instruction Manual
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Operating Information
Source
Sync Polarity
Field
Figure 1–2: Video Trigger Menu — Standard
You need to select which source you want the trigger to come from.
1. Choose the video source by selecting the main menu Source item.
2. Select one the four available channels in the side menu (Ch1, Ch2, Ch3, or
Ch4).
Negative polarity is needed for all standards as the sync pulse leading edge is
negative for HDTV, PAL, and NTSC. However, you may want to trigger on a
positive polarity pulse when probing circuitry that inverts the video signal. You
can easily change the polarity by using the Sync Polarity option.
1. Select the main menu Sync Polarity item.
2. Choose between Neg Sync and Pos Sync.
Specify the field to trigger on with the Field option (see Figure 1–3).
1. Press the main menu Field.
2. From the side menu, select FIELD, ODD, EVEN or ALL. Choose FIELD
to enter a number with the keypad or the general purpose knob. Numeric
fields are only useful with color signals. FIELD is not available if you have
selected Mono or SECAM mode. Use ODD to trigger on an odd numbered
TDS Family Option 05 Instruction Manual
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Operating Information
field such as 1 or 3. Choose EVEN to trigger on an even numbered field
such as 2 or 4. Choose ALL to trigger on the next field regardless of whether
it is odd or even (see Figure 1–3).
NOTE. The FIELD selection is the most sensitive of these selections to the signal
quality and the signal’s proper rise in divisions. The All selection is the least
sensitive. This means you may find All helpful when working with noisier
signals.
1–4
Line
Figure 1–3: Main Trigger Menu — Field
The Line item lets you select a particular line in the desired color field to trigger
on. For example, you can select line 125 in field 1.
1. Press the main menu Line.
2. Turn the general purpose knob to the desired line number.
If you want to enter a large number using the general purpose knob, press the
SHIFT button before turning the knob. When the light above the SHIFT button
is on and the display says Coarse Knobs in the upper right corner, the general
purpose knob speeds up significantly.
TDS Family Option 05 Instruction Manual
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Operating Information
Mode
If you selected NTSC, or PAL in the Standard menu, you can select further
variations in these trigger modes using the Mode menu item.
1. Select the Mode item in the main menu (see Figure 1–4).
Figure 1–4: Video Trigger Menu — PAL Mode
2. If you are using the NTSC standard, press either NTSC or Mono. If you are
using the PAL standard, press either PAL, Mono, or SECAM.
If you selected a numeric field in the Field menu and now choose Mono or
SECAM, the digitizing oscilloscope will reset the field to Odd. The numeric
field is only available when you select color modes (NTSC (4 fields) or PAL (8
fields)).
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Operating Information
Format
If you selected HDTV in the Standard menu, you can select the video format
with this menu item. You can choose from 787.5/60, 1050/60, 1125/60, or
1250/60 (see Figure 1–5).
Setup
Figure 1–5: Video Trigger Menu — HDTV Format
If you selected FlexFormat in the Standard menu, you can design the video
setup using the Setup menu item. You need to enter the Field Rate, Lines,
Fields, Sync Width, V1 Start Time, V1 Stop Time, V2 Start Time, or V2
Stop Time.
Field Rate refers to the number of fields per second (in Hz.) for your custom
video signal.
Lines refers to the maximum number of lines in a frame.
Fields refers to the number of fields in a frame.
Sync Width refers to the width of the sync pulse.
V1 Start Time is the time from the positive edge of the tri-sync pulse for the last
line in the selected field (t
) to the leading edge (negative) of the first negative
0
vertical sync pulse (see Figure 1–6).
V1 Stop Time is the time from t
to the trailing edge (positive) of the first
0
negative vertical sync pulse (see Figure 1–6).
1–6
TDS Family Option 05 Instruction Manual
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Operating Information
V2 Start Time is the time from the positive edge of the tri-sync pulse for the last
line in the selected field (t
) to the leading edge (positive) of the second vertical
0
sync pulse. Note: the second pulse may be a negative pulse or the negative
1
portion of a tri-sync pulse that is within the last line (usually located at the
2
line
point) (see Figure 1–6).
(a)
V2 Stop Time is the time from t
to the trailing edge (positive) of the second
0
negative vertical sync pulse. If Fields is set to 1, the V2 entries are ignored (see
Figure 1–6).
Field 1 (Odd)
V
W
Start
1
V
1
Stop
V
2
Start
V
2
Stop
Field 2 (Even)
(b)
V
W
Start
1
V
1
Stop
Figure 1–6: FlexFormat V1 Start, V1 Stop, V2 Start and V2 Stop Times
TDS Family Option 05 Instruction Manual
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Operating Information
Video Cursor
You can also choose video cursors that let you measure in IRE (NTSC)
amplitude units and video line number time units.
1. Press the CURSOR button to bring up the Cursor menu.
2. Select the Time Units item in the main menu and Video Line Number in
the side menu. Enter the value with the general purpose knob (see Figure 1–7).
1–8
Video Graticule
Figure 1–7: Cursor Menu — Video Line Number
3. Select the Amplitude Units item in the main menu and IRE (NTSC) in the
side menu. Enter the value with the general purpose knob.
You can also choose special, video graticules.
1. Press the DISPLAY button to bring up the Display menu.
2. Select the Graticule item in the main menu.
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Operating Information
NOTE. Selecting either NTSC or PAL graticules changes vertical scale, position,
offset, and input coupling settings of displayed channels to those appropriate for
measuring NTSC and PAL waveforms. You might wish to save the current setup
before switching to a NTSC or PAL graticule. You can then recall the saved
setting when you again select a graticule other than these two.
In order to use the NTSC or PAL graticule directly, don’t change the vertical
scale, position, offset, and input coupling settings of displayed channels. Also,
terminate your signal with 75 .
3. If you are using the NTSC standard, press NTSC (see Figure 1–8). If you are
using the PAL standard, press PAL (see Figure 1–9).
Figure 1–8: Display Menu — NTSC Graticule
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Operating Information
Figure 1–9: Display Menu — PAL Graticule
1–10
TDS Family Option 05 Instruction Manual
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WARNING
The following servicing instructions are for use only by qualified personnel. To
avoid injury, do not perform any servicing other than that stated in the operating
instructions unless you are qualified to do so. Refer to all safety summaries before
performing any service.
Page 26
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Service Information
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Service Information
This section contains information you need to troubleshoot and service the Video
Trigger. It includes the following subsections:
Troubleshooting contains information for determining whether the Video
Removal and Replacement Procedures gives step-by-step procedures for
Replaceable Parts List includes replacement part numbers with a corre-
Before Servicing
To prevent injury to yourself or damage to the oscilloscope, do the following
before you attempt service:
Be sure you are a qualified service person.
Trigger has failed. A troubleshooting tree and procedures for executing the
oscilloscope short and extended internal diagnostic routines are included.
removal and replacement of the Video Trigger circuit board.
sponding exploded view and ordering information.
Strategy for Servicing
Read the Operators Safety Summary found at the beginning of this manual
and the Service Safety Summary found at the beginning of this section.
Read the following Strategy for Servicing and Preventing Electrostatic
Discharge (ESD) Precautions on page 2–2.
The Troubleshooting subsection starting on page 2–3, contains procedures to
determine whether the Video Trigger feature has failed. If the video trigger
feature fails, replace the circuit board with a replacement part obtained from the
factory. See the Replaceable Parts List starting on page 2–13, for replacement
part numbers and ordering information.
TDS Family Option 05 Instruction Manual
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Service Information
Preventing Electrostatic Discharge (ESD)
CAUTION. Electrostatic discharge can damage any semiconductor component on
this oscilloscope option circuit board.
Precautions
When performing any service that requires internal access to the oscilloscope,
follow the following precautions to avoid damaging internal modules and their
components due to ESD.
1. Minimize handling of static-sensitive modules.
2. Transport and store static-sensitive modules in their static protected
containers or on a metal rail. Label any package that contains static-sensitive
modules.
3. Discharge the static voltage from your body by wearing a grounded antistatic
wrist strap while handling these modules. Perform service on static-sensitive
modules only at a static-free work station.
4. Remove anything capable of generating or holding a static charge on the
work station surface.
5. When possible handle circuit boards by the edges.
6. Do not slide the modules over any surface.
7. Avoid handling modules in areas that have a floor or work-surface covering
capable of generating a static charge.
2–2
TDS Family Option 05 Instruction Manual
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Troubleshooting
Troubleshooting
START
Execute extended
diagnostic routine (see
Page 2–4).
This subsection contains information and diagnostic procedures to determine if
the Video Trigger is faulty.
Use the troubleshooting tree in Figure 2–1 to determine if the Video Trigger is
working properly.
Pass
With the power off, check that connections
are tight.
1. Check connections on both ends of the
video cable (and be sure the Peltola
connector wire is not bent).
2. Check connections on the two digital
bus boards (A14 D1 Bus and A27
Connector).
3. Check connections of the two power
cable connectors between the A29 Video
Trigger and the A11 DRAM
Processor/Display boards.
Yes
No
Figure 2–1: Troubleshooting Tree
Video Trigger feature passes.
Execute extended
diagnostic routine (see
Page 2–4).
Pass
No
Order a replacement circuit board for the
Video Trigger (see the Replaceable Parts
List starting on page 2–13).
Yes
Replace the Video Trigger circuit board
(follow the Removal and Replacement
Procedures starting on page 2–5).
TDS Family Option 05 Instruction Manual
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Troubleshooting
Diagnostics
The oscilloscope has two levels of internal diagnostics: short confidence and
extended. The oscilloscope automatically executes the short set at power on. If
the video feature fails the short diagnostic routine, use the following procedure to
execute the extended diagnostics:
Prerequisites: Power on the oscilloscope and allow a 20 minute warm-up before
doing this procedure.
Executing Extended
Diagnostics Routine
1. Press SHIFT UTILITY
Execute (main) ➞ OK Confirm Run Test (side).
The internal diagnostics routine checks oscilloscope functions. When
finished, the oscilloscope displays an on-screen report of any failed modules,
features, or interfaces.
2. If the video trigger feature fails, continue with the troubleshooting diagram
shown in figure 2–1 on page 2–3. If needed, order a replacement Video
Trigger circuit board (see the Replaceable Parts List starting on page 2–13)
then follow the Removal and Replacement Procedures starting on page 2–5.
➞ System (main) ➞ Diag/Err (pop-up) ➞
2–4
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Removal and Replacement Procedures
Use the procedures in this subsection to remove and replace a faulty Video
Trigger circuit board.
Before You Begin
WARNING. To prevent possible injury to service personnel or damage to the
product components, read the Operators Safety Summary found at the beginning
of this manual and the Service Safety Summary, Before Servicing, Strategy for
Servicing, and Preventing ESD found at the beginning of this section.
WARNING. Disconnect the power cord from the line voltage source before doing
any procedure in this subsection. Failure to do so could cause serious injury or
death.
Rear Cover and Cabinet Removal
Equipment Required: One screwdriver with a size T-20 TorxR tip.
1. Install the front cover. Set the oscilloscope face down with the front cover on
the work surface and the bottom facing up (see Figure 2–2).
2. Unplug the power cord from its receptacle at the rear panel.
3. Using the screwdriver with size T-20 TorxR
(number 2 in Figure 2–2) securing the rear cover (number 1) to the oscilloscope. Lift off the rear cover.
4. Grasp the left and right edges of the cabinet (number 3) at the rear. Pull
upward to slide the cabinet off the oscilloscope. Do not bind or snag the
cabinet on the oscilloscope internal cabling as you remove it.
tip, remove the four screws
TDS Family Option 05 Instruction Manual
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Removal and Replacement Procedures
1
2
3
2–6
Figure 2–2: Rear Cover and Cabinet Removal
TDS Family Option 05 Instruction Manual
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Circuit Board Removal
Removal and Replacement Procedures
Equipment Required: One screwdriver with a size T-20 TorxR tip.
Figure 2–3 shows the A29 Video Trigger board (option 05) installed.
Figure 2–3:
5. Pull out the A23 SerPar Board assembly.
a. Using a screwdriver with size T-20 TorxR
(see number 1 in Figure 2–4) securing the rear plate of the A23 SerPar
board assembly.
tip, remove the two screws
b. Pull out the A23 SerPar board assembly (number 2 in Figure 2–4). It is
not necessary to pull the board assembly out entirely nor is it necessary
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Removal and Replacement Procedures
to remove the cable connector from the A23 SerPar board to the A11
Processor/Display board (see number 3 in Figure 2–4).
2
3
1
2–8
Figure 2–4: Pull Out A23 SerPar Circuit Board Assembly
6. Disconnect the two power cable connectors (the analog-power and digital-
power interconnect cables) from the video board connector and from the
processor-display circuit board connector (see number 2 on Figure 2–6).
7. Remove (or pull loose) the A14 D1 Bus board and the A27 Connector board
(see numbers 1 and 3 on Figure 2–6).
8. Unplug the coax video cable that connects the video board to the acquisition
boards (see Figure 2–5).
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Removal and Replacement Procedures
Figure 2–5: Proper Routing of the Video Cable
9. Slide back and lift up the Video Trigger circuit board (see Figure 2–6).
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Removal and Replacement Procedures
Figure 2–6: Circuit Board Removal
Circuit Board Replacement
Equipment Required: One screwdriver with a size T-20 TorxR tip and one
3/16-inch nutdriver.
1
3
2
2–10
TDS Family Option 05 Instruction Manual
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1. Reinstall the Video Trigger circuit board assembly in to the oscilloscope. Do
in reverse order steps 5 to 9 of the Circuit Board Removal procedure on
pages 2–7 through 2–9.
NOTE. Be sure to arrange the coax cable around the post as shown in figures 2–3
and 2–5. Failure to do this may impair performance.
Also, when plugging in the digital bus boards, 1 and 3 in figure 2–6, make sure
that they remain plugged in on both ends.
Replace Cabinet and Rear Cover
Equipment Required: One screwdriver with a size T-20 TorxR tip and one
torque driver.
1. Do step 1 of the Rear Cover and Cabinet Removal procedure on
page 2–5.
Removal and Replacement Procedures
Execute Diagnostics
2. Do in reverse order steps 2 through 4 of the Rear Cover and Cabinet
Removal procedure on page 2–5.
NOTE. When reinstalling the four screws at the rear panel, use the torque driver
to tighten the screws to 16 inch-lbs (18.4 cm-kg) torque.
To ensure the Video Trigger is working correctly, perform the Diagnostics
procedure on page 2–4.
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Removal and Replacement Procedures
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Replaceable Parts
This section contains a list of the replaceable modules for the <instrument>. Use
this list to identify and order replacement parts.
Parts Ordering Information
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
improvements. Therefore, when ordering parts, it is important to include the
following information in your order:
Part number
Instrument type or model number
Instrument serial number
Instrument modification number, if applicable
Module Servicing
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.
Modules can be serviced by selecting one of the following 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 significantly less than new modules and
meet the same factory specifications. For more information about the module
exchange program, call 1-800-TEK-WIDE, extension 6630.
Module Repair and Return. You may ship your module to us for repair, after which
we will return it to you.
New Modules. You may purchase replacement modules in the same way as other
replacement parts.
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Replaceable Parts List
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 name Description
1 Figure & index number Items in this section are referenced by figure and index numbers to the exploded view
illustrations that follow.
2 Tektronix part number Use this part number when ordering replacement parts from Tektronix.
3 and 4 Serial number Column three indicates the serial number at which the part was first effective. Column four
indicates the serial number at which the part was discontinued. No entry indicates the part is
good for all serial numbers.
5 Qty This indicates the quantity of parts used.
6 Name & description An item name is separated from the description by a colon (:). Because of space limitations, an
item name may sometimes appear as incomplete. Use the U.S. Federal Catalog handbook
H6-1 for further item name identification.
7 Mfr. code This indicates the code of the actual manufacturer of the part.
8 Mfr. part number This indicates the actual manufacturer’s or vendor’s part number.
Abbreviations
Mfr. Code to Manufacturer
Cross Index
Abbreviations conform to American National Standard ANSI Y1.1–1972.
The table titled Manufacturers Cross Index shows codes, names, and addresses
of manufacturers or vendors of components listed in the parts list.
2–14
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Replaceable Parts List
Manufacturers cross index
Mfr.
code
TK2469 UNITREK CORPORATION 3000 LEWIS & CLARK WA YSUITE #2 VANCOUVER W A 98601
80009 TEKTRONIX INC 14150 SW KARL BRAUN DR
0KB01 STAUFFER SUPPLY CO 810 SE SHERMAN PORTLAND, OR 97214–4657
53387 3M COMPANY ELECTRONICS PRODUCTS DIV
5Y400 TRIAX METAL PRODUCTS INC 1880 SW MERLO DRIVE BEAVERTON, OR 97006
64537 KDI/TRIANGLE ELECTRONICS INC 60 S JEFFERSON RD WHIPPANY, NJ 07981
73743 FISCHER SPECIAL MFG CO 111 INDUSTRIAL RD
Manufacturer Address City , state, zip code
PO BOX 500
3M AUSTIN CENTER
PO BOX 76500
BEAVERT ON OR 97077–0001
AUSTIN, TX 78769–2963
COLD SPRINGS, KY 41076
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Replaceable Parts List
Replaceable parts list
Fig. &
index
number
2–7–1
–1 174–0655–00 1 CABLE ASSY,RF:50 OHM COAX,22.4 L,9–2 TK2469 ORDER BY DESC
–2 671–2476–04 1 CIRCUIT BD ASSY:TV TRIGGER 80009 671247604
–3 671–2770–00
–4 174–2574–00
–5 671–4095–00 1 CIRCUIT BD ASSY:OPTION CONNECTOR 80009 671409500
–6 013–0278–00
NOT
SHOWN
Tektronix part
number
671–2848–00
174–3728–00
174–3729–00
174–3340–00
070–8762–xx
214-2270-00 2 CONTACT, ELEC: CLIP, ATTENUATORS TO CABINET 5Y400 214227000
210-0409-00 2 NUT, PLAIN, HEX: 8-32 X 0.312 BRASS, CD PLATE 73743 3046–402
211-0720-00 2 SCREW, ASSEMBLY, WASHER: 6-32 X 0.500, PNH, T-15 0KB01 ORDER BY
Serial no.
effective
Serial no.
discont’d
Qty Name & description
11CIRCUIT BD ASSY:D1–BUS
(TDS 500A & TDS 600A EXCEPT TDS 684A)
CIRCUIT BOARD ASSY: D1-BUS
(TDS 500B, TDS 600B, TDS 700 AND LATER SERIES & THE
TDS 684A )
2
CA ASSY, SP: RIBBON, 28 AWG, 4.875 L
(TDS 500A & TDS 600A SERIES EXCEPT TDS 684A)
1
CA ASSY, SP: RIBBON, 40-PIN, 28 AWG, 5.15 L
(TDS 500B, TDS 600B, TDS 700A AND LATER SERIES &
TDS 684A)
1
CA ASSY, SP: RIBBON, 50-PIN, 28 AWG, 6 L
(TDS 500B, TDS 600B, TDS 700A AND LATER SERIES &
TDS 684A)
1
CA ASSY, SP: RIBBON, 40-PIN, 28 AWG, 6.4 L
(TDS 500A & TDS 600A SERIES EXCEPT THE TDS 684A)
11CLAMP,VIDEO:DISPLAY,BACK PORCH CLAMP
MANUAL TECH: USER, VIDEO CLAMP
Mfr.
code
80009
80009
53387
TK2469
TK2469
80009
80009
80009
Mfr. part number
671277000
671284800
174257400
174372800
174372900
174334000
013027800
0708762xx
DESCRIPTION
2–16
STANDARD ACCESSORIES
070–8748–xx 1 MANUAL,TECH:INSTR,TDS OPT 05 VIDEO TRIG 80009 0708748xx
011–0055–01 1 TERM, COAXIAL:75 OHM,1W,BNC 64537 T174ES
TDS Family Option 05 Instruction Manual
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Replaceable Parts List
1
2
5
6
Figure 2–7: Video Trigger Replaceable Parts
TDS Family Option 05 Instruction Manual
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4
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Replaceable Parts List
2–18
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