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Removal and Installation Procedures

TDS 410, TDS 420 & TDS 460 Service Manual

6Ć11

H

Disassembly for Cleaning on page 6-35 is a procedure, based on the
module removal procedures just described, that removes all modules for
cleaning. Instructions for cleaning are found in

Inspection and Cleaning,

which begins this section

. The Disassembly for Cleaning procedure does

not use the access procedure.

NOTE

Read the cleaning procedure before disassembling the oscilloscope
for cleaning.

Figure 6-1: Oscilloscope Orientation

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Summary of Contents for 410

Page 1: ...igitizing Oscilloscopes 070 8036 02 Please check for change information at the rear of this manual Third Edition February 1994 Last Revised May 31 1994 Advanced Test Equipment Rentals www atecorp com 800 404 ATEC 2832 Established 1981 ...

Page 2: ...ronix Inc Beaverton Oregon USA E200000 Tektronix United Kingdom Ltd London J300000 Sony Tektronix Japan H700000 Tektronix Holland NV Heerenveen The Netherlands Instruments manufactured for Tektronix by external vendors outside the United States are assigned a two digit alpha code to identify the country of manufacture e g JP for Japan HK for Hong Kong IL for Israel etc Tektronix Inc P O Box 500 Be...

Page 3: ...o 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 Tektronix shall not be obligated to furnish service under this warranty a to repair damage resulting from attempts by personnel other than Tektronix representatives to install repair or service the product b to repair damage resulting from improp...

Page 4: ...rvice xxiv Warranty Repair Service xxiv Repair or Calibration Service xxiv Self Service xxv Specifications Product Description 1 1 General 1 1 User Interface 1 1 Menus 1 2 Indicators 1 2 General Purpose Knob 1 2 GUI 1 2 Signal Acquisition System 1 2 Horizontal System 1 3 Trigger System 1 4 Acquisition Control 1 4 On Board User Assistance 1 4 Help 1 4 Autoset 1 4 Measurement Assistance 1 5 Cursor 1...

Page 5: ...mperature 2 4 Ventilation Requirements 2 4 Applying and Interrupting Power 2 4 Power Up 2 4 Power Down 2 5 Repackaging Instructions 2 6 Installed Options 2 6 Operating Information 2 7 Screen Layout 2 7 Basic Procedures 2 7 How to Power Up 2 7 How to Use Help 2 8 How to Use the Status Menu 2 8 How to Set Functions 2 9 How to Set Complex Functions 2 12 Theory of Operation Circuit Description 3 1 Log...

Page 6: ...ime Base System Checks 4 31 Check Accuracy for Long Term Sample Rate Delay Time and Delta Time Measurements 4 31 Trigger System Checks 4 35 Check Accuracy Trigger Level or Threshold DC Coupled 4 35 Sensitivity Edge Trigger DC Coupled 4 38 Maximum Input Frequency Auxiliary Trigger 4 42 Check Video Trigger Sensitivity Option 05 Equipped Models Only 4 44 Output Signal Check 4 48 Check Probe Adjust Ou...

Page 7: ... 6 5 Inspection Exterior 6 6 Cleaning Procedure Exterior 6 6 Inspection Interior 6 7 Cleaning Procedure Interior 6 8 Lubrication 6 8 Removal and Installation Procedures 6 9 Preparation Please Read 6 9 List of Modules 6 10 Cable Removal 6 10 General Instructions 6 10 Summary of Procedures 6 10 Access Procedure 6 13 Procedures for Module Removal and Installation 6 21 Front Panel Knobs and Shafts 6 2...

Page 8: ...iliary Power Supply 6 58 A04 Acquisition Assembly 6 60 Main Chassis 6 62 Disassembly for Cleaning 6 62 Troubleshooting 6 65 Diagnostics 6 65 Firmware Updates 6 66 Troubleshooting Equipment 6 67 Console Port Set Up 6 67 Options Options and Accessories 7 1 Options 7 1 Standard Accessories 7 4 Optional Accessories 7 5 Electrical Parts List Replaceable Electrical Parts List 8 1 Diagrams Diagrams 9 1 S...

Page 9: ...Contents x ...

Page 10: ...e 4 15 Measurement of Trigger Sensitivity 4 40 Figure 4 16 Initial Test Hookup 4 42 Figure 4 17 Confirming Auxiliary Triggering at Maximum Triggering Frequency 4 43 Figure 4 18 Initial Test Hookup 4 44 Figure 4 19 Adjusting Sync Pulse Amplitude 4 45 Figure 4 20 Measurement of Video Sensitivity 4 46 Figure 4 21 Initial Test Hookup 4 48 Figure 4 22 Measurement of Probe Compensator Limits 4 49 Figure...

Page 11: ...emoval 6 35 Figure 6 13 A26 Monitor Assembly Removal 6 39 Figure 6 14 A08 Jumper Board Assembly D1 Bus and Board Supports Removal 6 41 Figure 6 15 A03 CPU Removal 6 42 Figure 6 16 A02 Display Assembly Removal 6 44 Figure 6 17 A09 DSP Assembly Removal 6 46 Figure 6 18 A01 Backplane Assembly and its Mount Removal 6 48 Figure 6 19 Battery Removal 6 50 Figure 6 20 A25 Low Voltage Power Supply Removal ...

Page 12: ...Troubleshooting Procedure 6 84 Figure 6 42 A08 Jumper and A05 Attenuator Boards Signal Locations 6 85 Figure 6 43 Acquisition and Attenuator Power Troubleshooting Procedure 6 86 Figure 6 44 A04 Acquisition Board Power Connector 6 87 Figure 6 45 Backplane Troubleshooting Procedure 6 88 Figure 6 46 A01 Backplane Module 6 90 Figure 6 47 I2C Isolation Troubleshooting Procedure 6 91 Figure 6 48 Console...

Page 13: ...Contents xx ...

Page 14: ...haracteristics Signal Acquisition System 1 18 Table 1 16 Typical Characteristics Time Base System 1 19 Table 1 17 Typical Characteristics Triggering System 1 19 Table 1 18 Typical Characteristics Data Handling 1 20 Table 2 1 Power Cord Conductor Identification 2 2 Table 2 2 Effects of Corrupted Data 2 5 Table 4 1 Test Equipment 4 14 Table 4 2 DC Offset Accuracy 4 19 Table 4 3 Analog Bandwidth TDS ...

Page 15: ... 13 Front Panel Connector Voltages 6 83 Table 6 14 Channel and P1 Signal Locations 6 85 Table 6 15 A05 Attenuator Board Power 6 86 Table 6 16 A04 Acquisition Board Power 6 86 Table 6 17 Regulator Voltages 6 89 Table 6 18 J7 Voltages 6 89 Table 6 19 J8 Front Panel Voltages 6 89 Table 7 1 International Power Cords 7 2 Table 7 2 Standard Accessories 7 4 Table 7 3 Probe Accessories 7 4 Table 7 4 Optio...

Page 16: ...age to the equipment or other property H statements identify conditions or practices that could result in personal injury or loss of life These two terms appear on equipment H CAUTION indicates a personal injury hazard not immediately accessible as one reads the marking or a hazard to property including the equipment itself H DANGER indicates a personal injury hazard immediately accessible as one ...

Page 17: ...either supply conductor and ground A protective ground connection through the grounding conductor in the power cord is essential for safe system opera tion Grounding the Digitizing Oscilloscope The digitizing oscilloscope is grounded through the power cord To avoid electric shock plug the power cord into a properly wired receptacle where earth ground has been verified by a qualified service person...

Page 18: ...r covers Do Not Operate in Explosive Atmospheres The digitizing oscilloscope provides no explosion protection from static dis charges or arcing components Do not operate the digitizing oscilloscope in an atmosphere of explosive gasses Electric Overload Never apply a voltage to a connector on the digitizing oscilloscope that is outside the range specified for that connector ...

Page 19: ...Safety Summary xx ...

Page 20: ...needed to safely power up and service this oscil loscope A statement of the service strategy that this manual supports as well as instructions for shipment of the digitizing oscilloscope are found in this section H Theory of Operation contains circuit descriptions that support general service and fault isolation H Performance Verification contains a collection of procedures for con firming that th...

Page 21: ... Besides the symbols related to safety this manual uses the following sym bols The stop sign icon labels information which must be read in order to correctly do service and to avoid incorrectly using or applying service procedures The clock icon labels procedure steps which require a pause to wait for the oscilloscope to complete some operation before you can continue Various icons such as the exa...

Page 22: ...ences to CH 3 and CH 4 Throughout this manual any field replaceable component assembly or part of this oscilloscope is referred to generically as a module This manual contains all the information needed for periodic maintenance of your oscilloscope Examples of such information are procedures for checking performance and for readjustment Further it contains all information for corrective maintenanc...

Page 23: ...loscope to fit your requirements Option 9C When you order your digitizing oscilloscope with option 9C it is shipped with a Certificate of Calibration and Test Data This certificate provides traceability to the National Institute of Standards and Technology NIST It certifies procedures used to calibrate the oscilloscope comply with U S Military Standard 45662A At Depot Service Tektronix offers seve...

Page 24: ... center typically within 24 hours Each module comes with a 90 day service warranty Module Repair and Return This service returns to you within 10 days the same module that you shipped to Tektronix The module shipped is re paired tested and returned to you from the Beaverton Oregon service center It is not updated to match current modules of the same type Again each module comes with a 90 day servi...

Page 25: ...Introduction x x ...

Page 26: ...Specifications ...

Page 27: ...h of 150 MHz TDS 410 and TDS 420 or 350 MHz TDS 460 and all have the same features H Video triggering capabilities with Option 5 Video Trigger H Full programmability and printer plotter output H Advanced functions such as continuously updated measurements H Specialized display modes such as infinite and variable persistence H A unique graphical user interface GUI an on board help mode and a logica...

Page 28: ...d measure and read outs to display the status of the instrument General Purpose Knob Menus can also be used to assign the general purpose knob to adjust a selected parameter function The method employed is the same as for select ing a function except the final selection in the side menu causes the general purpose knob to adjust some function such as the position of measurement cursors on screen or...

Page 29: ...h Option 1M 2The maximum record length of 60 000 points for oscilloscopes equipped with Option 1M reduces to 15 000 points when operating in Hi Res or Average acquisition mode Both the delayed only display and the intensified zone on the main intensified display can be delayed by time with respect to the main trigger Both can be set to display immediately after the delay delayed runs after main mo...

Page 30: ...ur measurement requirements you can specify the mode and manner in which signals are acquired and processed H You can select equivalent time sampling on repetitive signals or interpola tion of points sampled on non repetitive signals Both can increase the apparent sample rate on the waveform when maximum real time rates are reached H Peak detect high resolution sample envelope and average modes ca...

Page 31: ... are extracted continuously and the results updated on screen as the digitizing oscilloscope continues to acquire waveforms Digital Signal Processing DSP An important component of the multiprocessor architecture of this digitizing oscilloscope is Tektronix proprietary digital signal processor the DSP This dedicated processor supports advanced analysis of your waveforms when doing such compute inte...

Page 32: ...IWYG What You See Is What You Get based on what is displayed at the time hardcopy is invoked A VGA compatible video output available at the rear panel is also standard with the TDS 400 digitizing oscilloscope The TDS 400 Digitizing Oscilloscopes offer flexible display options You can customize the following attributes of your display H Intensity waveforms readouts graticule etc H Style of waveform...

Page 33: ...put Resistance Selections 1 MW or 50W Ranges Offset All Channels Volts Div Setting 1 mV div to 99 5 mV div 100 mV div to 995 mV div 1 V div to 10 V div Offset Range V V V Range Position divisions Range Sensitivity2 1 mV div to 10 V div 1Displayed vertically with 25 digitization levels DLs per division and 10 24 divisions dynamic range with zoom off A DL is the smallest voltage level change resolve...

Page 34: ... lengths of 30 000 and 60 000 points are available with Op tion 1M 4 1The range of real time rates expressed in samples second at which a digitizer samples signals at its inputs and stores the samples in memory to produce a record of time sequential samples 2The range of waveform rates for equivalent time or interpolated waveform records 3The Waveform Rate WR is the equivalent sample rate of a wav...

Page 35: ...y Grey Scale 16 levels in infinite persistence and variable persistence display styles Table 1 6 Nominal Traits Data Storage Name Description Capacity Nonvolatile Waveform Memory Standard Instrument Total capacity is 60 000 points Option 1M Equipped Instrument Total capacity is 60 000 points one to four waveforms acquired with any combination of record lengths that add up to 60 000 points For avai...

Page 36: ...ir filter Construction Material Chassis parts constructed of aluminum alloy front panel constructed of plastic laminate circuit boards constructed of glass laminate Plas tic parts are polycarbonate Finish Type Tektronix Blue textured finish on aluminum cabinet Weight Standard digitizing oscilloscope 8 6 kg 19 0 lbs oscilloscope only 10 2 kg 22 5 lbs with front cover accessories and accessories pou...

Page 37: ...ories pouch are installed 165 mm 6 5 in without the accessories pouch installed Width 362 mm 14 25 in with handle Depth 471 mm 18 55 in oscilloscope only 490 mm 19 28 in with optional front cover installed 564 mm 22 2 in with handle fully extended Rackmount digitizing oscilloscope Height 178 mm 7 0 in Width 483 mm 19 0 in Depth 472 mm 18 6 in without front panel handles 517 mm 20 35 in with front ...

Page 38: ...t temperature be tween 20_ C and 30_ C has had a warm up period of at least 20 minutes and is operating at an ambient temperature between 0_ C and 50_ C unless otherwise noted Table 1 9 Warranted Characteristics Signal Acquisition System Name Description Accuracy DC Voltage Measurement Averaged Measurement Type Average of 16 waveforms Delta volts between any two av erages of 16 waveforms2 DC Accur...

Page 39: ...iv u500 mV div 9 95 mV div 10 mV div 500 mV div Isolation 40 1 at 50 MHz for any two channels having equal volts divi sion settings 40 1 at 50 MHz for any two channels having equal volts divi sion settings 80 1 at 100 MHz and 30 1 at full bandwidth for any two chan nels having equal volts division settings Delay Between Channels Full Band width Equivalent Time 200 ps between CH 1 and CH 2 all mode...

Page 40: ...obes are used Table 1 10 Warranted Characteristics Time Base System Name Description Accuracy Long Term Sample Rate and Delay Time 50 ppm over any 1 ms interval Accuracy Absolute Time and Delay Time Measurements1 2 For single shot acquisitions using sample or high resolution acquisi tion modes and a bandwidth limit setting of 100 MHz 1 WI 150 ppm of Reading 450 ps For single shot acquisitions usin...

Page 41: ...ing Offset Accuracy for any channel as trigger source and for signals having rise and fall times 20 ns Sensitivity Edge Type Trigger DC Coupled2 0 35 division from DC to 50 MHz increasing to 1 division at 350 MHz TDS 410 and TDS 420 or 500 MHz TDS 460 for any channel as trigger source Sensitivity Video Type TV Field and TV Line2 0 6 division of video sync signal Pulse Width minimum Events Delay 5 ...

Page 42: ...eristic Voltage Frequency Limits 0 5 V base top 1 MW load 1 kHz Table 1 13 Warranted Characteristics Power Requirements Name Description Source Voltage and Frequency 90 to 132 VAC rms continuous range for 48 Hz through 62 Hz 100 to 132 VAC rms continuous range for 48 Hz through 440 Hz 180 to 250 VAC rms continuous range for 48 Hz through 440 Hz Power Consumption 240 Watts 370 VA ...

Page 43: ...ent or 0 2 division increase in p p noise when the oscilloscope is subjected to the EMI specified in the standard IEC 801 2 Electrostatic Discharge Performance Criteria B Dynamics Random vibration3 0 31 g rms from 5 to 500 Hz 10 minutes each axis operating 2 46 g rms from 5 to 500 Hz 10 minutes each axis non operating 1To maintain emission requirements when connecting to the IEEE 488 GPIB interfac...

Page 44: ...1 DL integral independently based3 Step Response Settling Error Volts Div Setting Step Amplitude Settling Error 4 1 mV div 99 5 mV div 100 mV div 995 mV div 1 V div 10 V div 2 V 20 V 200 V 20 ns 0 5 2 0 2 0 500 ns 0 2 0 5 0 5 20 ms 0 1 0 2 0 2 1Net Offset Offset Position x Volts Div Net Offset is the voltage level at the center of the A D converter dynamic range Offset Accuracy is the accuracy of ...

Page 45: ...Reject Typical Signal Level for Stable Trig gering Same as DC coupled limits4 for frequen cies above 60 Hz Attenuates signals below 60 Hz Three and one half times the DC coupled limits 4 One and one half times the DC coupled limits4 from DC to 30 kHz Attenuates signals above 30 kHz One and one half times the DC coupled limits4 for frequencies above 80 kHz Attenuates signals below 80 kHz 1The trigg...

Page 46: ...kHz and 35 kHz 64 kHz Holdoff Automatically adjusts to 50 ms nominal for NTSC class to 140 ms nominal for PAL and SECAM Triggerable on Field Selections Odd Even or Both Delayed Acquisition Settable for delay by line number or runs after time delay 5The maximum frequency for a delaying events input 6The minimum pulse width and rearm width required for recognizing a delaying event Table 1 18 Typical...

Page 47: ...Operating Information ...

Page 48: ... maximum rated operating voltage Before making connection to the power source be sure the digitizing oscilloscope has a suitable two pole three terminal grounding type plug GROUNDING This instrument is safety Class 1 equipment IEC designation All accessible conductive parts are directly connected through the grounding conductor of the power cord to the grounded earthing contact of the power plug W...

Page 49: ... Before stepping the source line voltage from one range to a higher range set the principal power switch rear panel to its OFF posi tion Failure to do so can damage the oscilloscope There are two fuses Either fuse may be used throughout the line voltage and frequency ranges These two fuses are not totally interchangeable as each requires a different fuse cap The fuses and their caps are listed by ...

Page 50: ...115V Option A1 Universal Euro 230V Option A2 UK 230V Option A3 Australian 230V Option A4 North American 230V Option A5 Switzerland 230V Canadian Standards Association certification includes these power plugs for use in the North American power network Figure 2 1 Power Cord Plug Identification ...

Page 51: ...om of the digitizing oscilloscope The feet on the bottom of the oscilloscope provide the required clearance when set on flat surfaces The top of the oscilloscope does not require ventilation clearance CAUTION If air flow is restricted the power supply of the digitizing oscilloscope may temporarily shut down Consider the following information when you power up or power down the oscilloscope or when...

Page 52: ...ns complete wait at least four more seconds before turning the power off Improper power down or unexpected loss of power to the oscilloscope can result in corruption of non volatile RAM NVRAM The following table describes the messages displayed when power is restored after an abnormal power down Table 2 2 Effects of Corrupted Data Corrupted Data Type Results Adjustment Constants H Signal Path Comp...

Page 53: ... oscilloscope the reason for returning and a complete description of the service required 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 Your oscilloscope may be equipped with one or more options Except for the line cord options described by Tab...

Page 54: ...unctions The screen layout is illustrated in Figure 2 2 on page 2 8 Note that the figure illustrates a full graticule you may also select a grid crosshair or frame graticule from the display menu How to Power Up Push the principal power switch found on the rear panel of the digitizing oscilloscope then push the ON STBY standby switch to toggle the digitizing oscilloscope into operation The switch ...

Page 55: ... 2 2 Map of Display Functions How to Use Help Push the HELP front panel button to enter help mode Front panel knobs and buttons now display information about their function when turned or pushed Push HELP again to exit help mode To get help information on a menu item display the menu desired if you are in help mode exit help first Push HELP Now the menu buttons display information about their func...

Page 56: ...or by pushing a front panel button to use a main menu and then a side menu to set the function The following steps illustrate both procedures 1 Locate the block that contains the function to be set Special Controls Block Accesses all functions except those in the remaining three control blocks Vertical Controls and Inputs Block Horizontal Controls Block Trigger Controls Block ...

Page 57: ...on 8 to display its waveform The last channel selected determines which waveform is positioned and scaled The indicator above the channel last selected is lighted Example Push CH 1 then CH 2 c Vertically 1 and horizontally 2 scale and position the waveform s selected Example Set the scale to 100 mV div and center the waveform on screen d Stop and start acquiring waveforms 3 Example Push RUN STOP i...

Page 58: ... to the menu containing the function A main menu 14 for selecting among related functions appears Example Push VERTICAL MENU Note the two labels the top label is a function to choose from the bottom label tells you the current setting for that function Offset is currently set to 1 4 V d Select a function from the main menu using the main menu but tons 12 A side menu for selecting among the availab...

Page 59: ...up a menu 18 of subfunctions Example Push SHIFT then push UTILITY Now push System 17 Note the pop up menu for System is set to I O input output All the main menu buttons to the right of the pop up menu are labeled with subfunctions of I O b Pushing the button that popped up the menu 17 toggles through the pop up menu choices Example Repeatedly push System to toggle through the pop up menu Notice t...

Page 60: ...to control the readout appearing in the button label It also copies the readout to the general purpose knob readout area in the right corner of the screen Example Push Level 19 c Use the general purpose knob 20 to adjust the trigger level to the setting desired Example Turn the knob to 20 mV More About the General Purpose Knob As you have just seen the general purpose knob is used to extend the nu...

Page 61: ...large parts of the adjustment range in less time H Whenever the general purpose knob assignment is changed a knob icon appears immediately to the left of the general purpose knob readout to notify you of the assignment change The icon is removed as soon as you use the general purpose knob to change the value of the function it is assigned to H To assign the general purpose knob to control a functi...

Page 62: ...graticule etc H Style of waveform display s vectors or dots intensified or non intensified samples and infinite or variable persistence H Display format XY or YT H Graticule format full grid crosshair and frame H Waveform interpolation filter and readout options From the Utility menu you can configure the GPIB port talk listen address etc and access internal routines for self diagnostics and self ...

Page 63: ...Operating Information Operating Information 2Ć16 ...

Page 64: ...Theory of Operation ...

Page 65: ...ve of the two logic levels is the high 1 state and the more negative level is the low 0 state Signal states may also be described as true meaning their active state or false meaning their non active state The specific voltages that constitute a high or low state vary among the electronic devices Active low signals are indicated by a tilde prefixed to the signal name RE SET Signal names are either ...

Page 66: ...f the digital signal proces sor DSP requests the waveform Processor System The processor system consists of a 68020 micro processor that controls the entire instrument It includes the firmware program for the oscilloscope The firmware can be reprogrammed by using the GPIB and an external software package The processor system also includes a GPIB interface DSP The digital signal processor processes...

Page 67: ... to the low voltage power supply Rear Panel The GPIB connector provides access to stored waveforms and allows exter nal control of the oscilloscope Other connectors accessible from the rear panel are the AUX TRIGGER and VIDEO Aux Power The A07 Auxiliary Power circuitry includes the principal power switch fuse line trigger transformer and line filter It also distributes power to the monitor and fan...

Page 68: ...Circuit Description Theory of Operation 3Ć4 ...

Page 69: ...Performance Verification ...

Page 70: ...ctional and accu racy testing to provide high confidence that the oscilloscope will perform properly Use these procedures as a quick check before making a series of important measurements H To further check functionality first do the Self Tests just mentioned then do the procedures under Functional Tests that begin on page 4 6 Advantages These procedures require minimal additional time to per form...

Page 71: ...o do while the instructions that follow tell you how to do it in the exam ple step below Initialize the oscilloscope by doing Press save recall SETUP Now press the main menu button Initialize the oscilloscope Press save recall SETUP Now press the main menu button Recall Factory Setup then the side menu button OK Confirm Factory Init H Where instructed to use a front panel button or knob or select ...

Page 72: ...splay Brief status information Position of waveform record relative to the screen and display General purpose knob readout Waveform reference symbols ground levels and waveform sources Graticule and waveforms Side menu area Readouts for measurements move here when CLEAR MENU is pressed Main menu display area Readouts in lower graticule area move here when CLEAR MENU is pressed Vertical scale horiz...

Page 73: ...l Diag Err is highlighted in the menu that pops up H Repeatedly press the main menu button Area until All is high lighted in the menu that pops up b Run the system diagnostics Press the main menu button Execute then press the side menu button OK Confirm Run Test c Wait The internal diagnostics do an exhaustive verification of proper oscilloscope function This verification takes up to a minute Whil...

Page 74: ...at the measurements you make are made with the most accuracy possible You should also run an SPC if the temperature has changed more than 5_C since the last SPC was per formed f Run the signal path compensation Disconnect all input signals Press the main menu button Signal Path then press the side menu button OK Compensate Signal Paths NOTE Failure to run the signal path compensation may result in...

Page 75: ... interpret the quantities given as limits Operation within limits is checked in Performance Tests which begin on page 4 13 DO NOT make changes to the front panel settings that are not called out in the procedures Each verification procedure will require you to set the oscilloscope to certain default settings before verifying func tions If you make changes to these settings other than those called ...

Page 76: ... following substeps test CH 1 first skipping substep a since CH 1 is already set up for verification from step 1 a Select an unverified channel H Press WAVEFORM OFF to remove from display the channel just verified H Press the front panel button that corresponds to the channel you are to verify H Move the probe to the channel you selected b Set up the selected channel H Press AUTOSET to obtain a vi...

Page 77: ...t of each statement as you confirm those statements H Sample mode displays an actively acquiring waveform on screen Note that there is noise present on the peaks of the square wave H Peak Detect mode displays an actively acquiring waveform on screen with the noise present in Sample mode peak de tected H Hi Res mode displays an actively acquiring waveform on screen with the noise that was present i...

Page 78: ...g the horizontal SCALE knob clockwise expands the wave form on screen more horizontal divisions per waveform period and that counterclockwise rotation contracts it and that returning the horizontal scale to 200 ms returns the period to about five divisions c The horizontal POSITION knob positions the signal left and right on screen when rotated 3 Remove the test hookup Disconnect the probe from th...

Page 79: ...triggers the signal that you just left untriggered Leave the signal triggered 3 Verify that the delayed trigger system operates a Select the delayed time base H Press HORIZONTAL MENU H Press the main menu button Time Base H Press the side menu button Delayed Triggerable then press the side menu button Delayed Only H Set the horizontal SCALE for the D delayed time base to 200 ms b Select the delaye...

Page 80: ...de menu button Events just below the Triggerable after Time selection H Use the General Purpose knob to enter an event count of 325 events H Verify that the trigger READY indicator on the front panel flashes about once every second as the waveform is updated on screen 4 Remove the test hookup Disconnect the standard accessory probe from the channel input and the probe adjust terminal ...

Page 81: ...Brief Procedures Performance Verification 4Ć12 ...

Page 82: ...scilloscope H You must have performed and passed the procedures under Self Tests found on page 4 4 and those under Functional Tests found on page 4 6 H A signal path compensation must have been done within the recom mended calibration interval and at a temperature within _ C of the present operating temperature If at the time you did the prerequisite Self Tests the temperature was within the limit...

Page 83: ... part number 012 1338 00 Used to test Video Option 05 equipped instruments only 7 Connector Dual Banana two re quired Female BNC to dual banana Tektronix part number 103 0090 00 Various accuracy tests 8 Connector BNC T Male BNC to dual female BNC Tektronix part number 103 0030 00 Checking trigger sensitivity 9 Coupler Dual Input Female BNC to dual male BNC Tektronix part number 067 0525 02 Checkin...

Page 84: ...m TEKTRONIX TG 501 Time Mark Generator1 Checking sample rate and delay time accuracy 14 Probe 10X in cluded with this instrument A P6138 probe Tektronix number P6138 Signal interconnec tion 15 Generator Vid eo Signal Provides NTSC compatible outputs TEKTRONIX TSG 1001 Checking video trig ger sensitivity 1Requires a TM 500 or TM 5000 Series Power Module Mainframe Test Record Photocopy the next two ...

Page 85: ...495 V CH4 Offset 1 V TDS 420 10 V TDS 460 99 9 V 995 mV 9 935 V 99 2505 V __________ __________ __________ __________ __________ __________ 1 005 V 10 065 V 100 5495 V DC Voltage Measurement Accuracy Averaged CH1 100 mV 20 8 mV __________ __________ 20 8 mV CH2 100 mV 20 8 mV __________ __________ 20 8 mV CH3 100 mV TDS 420 460 20 8 mV __________ __________ 20 8 mV CH4 100 mV TDS 420 460 20 8 mV _...

Page 86: ...ce Test Trigger System DC Coupled Threshold Main Trigger Main Trigger Falling 18 mV 18 mV __________ __________ __________ __________ 18 mV 18 mV Delayed Trigger Delayed Trigger Falling 18 mV 18 mV __________ __________ __________ ___________ 18 mV 18 mV Probe Compensator Output Signal Frequency 950 Hz __________ __________ 1050 Hz Voltage 475 mV __________ __________ 525 mV ...

Page 87: ...s Dual Banana to BNC Adapters BNC T Connector Figure 4 4 Initial Test Hookup a Hook up the test signal source H Set the output of a DC calibration generator to 0 volts H Connect the output of a DC calibration generator through a dual banana connector followed by a 50 W precision coaxial cable to one side of a BNC T connector H Connect the Sense output of the generator through a second dual banana ...

Page 88: ...step a since CH 1 is already set up to be checked from step 1 WARNING High voltages are used in this procedure Before doing this or any other procedure in this manual read the Safety Summary found at the beginning of this manual a Select an unchecked channel H Press WAVEFORM OFF to remove the channel just confirmed from the display Then press the front panel button that corre sponds to the channel...

Page 89: ...d for the channel under test f Test all channels Repeat substeps a through e for all input channels 3 Disconnect the hookup a Set the generator output to 0 V b Then disconnect the cable from the generator output at the input connector of the channel last tested Check DC Voltage Measurement Accuracy Averaged Equipment Required Two dual banana connectors Item 7 one BNC T connector Item 8 one DC cali...

Page 90: ...ain menu button Graticule then press the side menu button Frame H Press MEASURE H Press the main menu button Select Measurement for CHx then press the side menu button Mean You will have to press MORE several times to access the Mean measurement H Set the vertical SCALE to 100 mV H Press the VERTICAL MENU button and then the Offset main menu button Set the offset to 0 V H Set the vertical POSITION...

Page 91: ...r Set the DC calibration generator to 0 35 V e Check against limits Do the following subparts in the order listed H Use this formula to calculate voltage measurement accuracy 700 mV mean from step c present mean For example 700 mV 347 mV 358 mV 5 mV H CHECK that the voltage measurement accuracy is within 20 8 mV f Test all channels Repeat substeps a through e for all channels 3 Disconnect the hook...

Page 92: ...ENU H Press the main menu button COUPLING then press the side menu button Noise Rej H Press SHIFT then ACQUIRE MENU H Press the main menu button Mode then press the side menu button Average 16 H Press Measure Now press the main menu button High Low Setup then press the side menu button Min Max Medium Frequency Sine Wave Generator Output Figure 4 6 Initial Test Hookup TDS 410 and TDS 420 c TDS 410 ...

Page 93: ...ep 1 a Select an unchecked channel H Press WAVEFORM OFF to remove the channel just confirmed from display H Press the front panel button that corresponds to the channel you are to confirm H Move the leveling head to the channel you select b Match the trigger source to the channel selected H Press TRIGGER MENU H Press the main menu button Source H Press the side menu button that corresponds to the ...

Page 94: ...g Bandwidth TDS 460 Vertical Scale Attenuators 10X Reference Amplitude at 6 MHz Horizontal Scale Test Frequency Limits 100 mV none 600 mV 6 divisions 2 ns 350 MHz 424 mV 1 V none 5 V 5 divisions 2 ns 350 MHz 3 535 V 500 mV none 3 V 6 divisions 2 ns 350 MHz 2 121 V 200 mV none 1 2 V 6 divisions 2 ns 350 MHz 848 mV 50 mV 1 300 mV 6 divisions 2 ns 350 MHz 212 mV 20 mV 1 120 mV 6 divisions 2 ns 350 MH...

Page 95: ...the horizontal SCALE to 5 ns TDS 410 and TDS 420 or 2 ns TDS 460 H Press SET LEVEL TO 50 as necessary to trigger the display H Read the results at the CHx Pk Pk readout which automatically measures the amplitude of the test signal See Figure 4 8 Second read the results from the readout of measurement Pk Pk First increase the reference frequency to the test frequency then decrease the horizontal sc...

Page 96: ...f desired finish checking the remaining vertical scale settings for the channel under test by repeating substeps d through g for each of the remaining scale settings listed in Table 4 3 TDS 410 and TDS 420 or Table 4 4 TDS 460 for the channel under test H When doing substep e skip the subparts that turn on the CHx Pk Pk measurement until you check a new channel H Install remove 10X attenuators bet...

Page 97: ...t signal source H Connect the sine wave output of a medium frequency sine wave generator to a 50 W precision coaxial cable a 50 W termination and a dual input coupler Refer to Figure 4 9 H Connect the coupler to both CH 1 and CH 2 Ensure that the coupler cables are of equal length Medium Frequency Sine Wave Generator Dual Input Coupler 50 W Terminator Output Figure 4 9 Initial Test Hookup 2 Confir...

Page 98: ...H 4 to display H Now press the front panel button MORE Press the main menu buttons Ref 2 and Ref 3 f Measure the test signal H Locate the point on the rising edge of the left most waveform where it crosses the center horizontal graticule line This is the time reference point for this waveform Note the corresponding time reference point for right most waveform See Figure 4 10 H Press CURSOR then pr...

Page 99: ...limit H Press WAVEFORM OFF four times to remove all waveforms H Press CH 1 H Press MORE then press the main menu button Ref 2 H Measure the delay between CH 1 and Ref 2 using the method described in substep f above H CHECK that the cursor readout on screen is 200 ps H If you are testing a TDS 410 skip to step 3 H Press WAVEFORM OFF twice to turn off CH 1 and Ref 2 then press CH 4 to turn on CH 4 H...

Page 100: ...p 1 Install the test hookup and preset the instrument controls a Hook up the test signal source Connect through a 50 W precision coaxial cable the time mark output of a time marker generator to CH 1 Set the output of the generator for 10 ms markers b Initialize the oscilloscope H Press save recall SETUP H Press the main menu button Recall Factory Setup H Press the side menu button OK Confirm Facto...

Page 101: ...for accuracies a Display the test signal H Adjust the horizontal POSITION to move the trigger T to the right and on to the screen Continue to position the trigger T to align it to the center vertical graticule line H Press the main menu button Time Base H Press the side menu buttons Delayed Only and Delayed Runs After Main b Measure the test signal H First set the horizontal SCALE of the D delayed...

Page 102: ... H Press the side menu button Main Only Set horizontal SCALE to 5 ns H Set the output of the generator for 50 ns markers H Press SET LEVEL TO 50 H Press VERTICAL MENU H Press the main menu button Bandwidth then press the side menu button 100 MHz H Press SHIFT then ACQUIRE MENU Now press the main menu button Mode then press the side menu button Average H Use the General Purpose knob to set the numb...

Page 103: ...ce Tests Performance Verification 4Ć34 H CHECK that the readout for CH 1 Per is within 49 592 ns to 50 408 ns 3 Disconnect the hookup Disconnect the cable from the generator output at the input connector of CH 1 ...

Page 104: ... Cables Dual Banana to BNC Adapter BNC T Connector Figure 4 13 Initial Test Hookup 1 Install the test hookup and preset the instrument controls a Hook up the test signal source H Set the output of a DC calibration generator to 0 volts H Connect the output of a DC calibration generator through a dual banana connector followed by a 50 W precision coaxial cable to one side of a BNC T connector H Conn...

Page 105: ...n menu button Slope then press the side menu button for negative slope See icon at left Repeat substep b H Subtract the trigger level readout from the DC calibration genera tor setting The result is the trigger level accuracy H CHECK that the trigger level is accurate to within 18 mV 3 Confirm Delayed trigger system is within limits for Trigger level Threshold accuracy a Select the Delayed time ba...

Page 106: ...Press TRIGGER MENU Press the main menu button Slope then press the side menu button for negative slope See icon at left H Subtract the trigger level readout from the DC calibration genera tor setting The result is the trigger level accuracy H CHECK that the trigger level is accurate to within 18 mV 4 Disconnect the hookup a First set the output of the DC calibration generator to 0 volts b Then dis...

Page 107: ...tialized front panel control settings H Set the horizontal SCALE for the M main time base to 20 ns H Press HORIZONTAL MENU then press the main menu button Time Base H Press the side menu button Delayed Only then press the side menu button Delayed Triggerable H Set the horizontal SCALE for the D delayed time base to 20 ns then press the side menu button Main Only H Press TRIGGER MENU then press the...

Page 108: ... CH 1 Amplitude readout indicates the amplitude is 350 mV Readout may fluctuate around 350 mV H Disconnect the 50 W precision coaxial cable at CH 1 and recon nect it to CH 1 through a 10X attenuator b Check for Main trigger system for stable triggering at limits H Read the following definition A stable trigger is one that is con sistent that is one that results in a uniform regular display trigger...

Page 109: ...rigger is obtained for the test waveform for both the positive and negative slopes of the waveform Use the General Purpose knob to stabilize the trigger if required Press the main menu button Slope then use the side menu to switch between trigger slopes H Leave the delayed trigger system triggered on the positive slope of the waveform before continuing to the next step Also return to the main time...

Page 110: ...mplitude is 500 mV Readout may fluctu ate around 500 mV H Disconnect the leveling head at CH 1 and reconnect it to CH 1 through a 5X attenuator d Repeat step 2 substeps b and c only 4 Confirm that the Main and Delayed trigger systems couple trigger signals from all channels Doing the procedure Check Analog Bandwidth which begins on page 1 22 checks coupling If you have not done that proce dure do ...

Page 111: ...Press the main menu button Recall Factory Setup H Press the side menu button OK Confirm Factory Init b Modify the initialized front panel control settings H Set the vertical SCALE to 1 volt set the horizontal SCALE to 20 ns H Press VERTICAL MENU H Press the main menu button Coupling Press the side menu button W to toggle it to the 50 W setting H Press TRIGGER MENU Press the main button SOURCE then...

Page 112: ...stem for stable triggering at limits H Read the following definition A stable trigger is one that is con sistent that is one that results in a uniform regular display triggered on the selected slope positive or negative This display should not have its trigger point switching between opposite slopes nor should it roll across the screen First set a signal with a four division amplitude and a 10 MHz...

Page 113: ...rm Factory Init b Modify the default setup H Set the vertical SCALE to 500 mV H Set the horizontal SCALE to 20 ms H Press HORIZONTAL MENU H Press the main menu button Record Length H Press the side menu button 5000 points in 100 divs Video Generator 75 W Terminator Output Figure 4 18 Initial Test Hookup c Hook up the test signal source Connect through a 75 W precision coaxial cable followed by a 7...

Page 114: ...VERTICAL MENU H Press the main menu button Fine Scale H Use the General Purpose knob adjust the fine gain until the sync pulse amplitude is 0 6 divisions measured using the graticule see Figure 4 19 Adjust the sync pulse amplitude for 0 6 divisions Figure 4 19 Adjusting Sync Pulse Amplitude c Check for stable triggering against limits H Read the following definition A stable trigger is one that is...

Page 115: ...d 2 see waveform R1 in Figure 4 20 H Press the side menu button Interlaced Field Two Center the display at mid screen H CHECK that a stable trigger is obtained with the last of TV field 1 and the beginning of TV field 2 displayed If the last line is a TV line duration 31 75 ms then it is the end of field 1 see waveform R2 in Figure 4 20 H Press the side menu button Non Interlaced Both Fields H Pre...

Page 116: ...de menu button Interlaced Field One H Rotate the horizontal POSITION control counter clockwise and align the trigger T to center screen H Press the main menu button TV Delay Mode H Press the side menu button Delay by Lines H Use the General Purpose knob to set the line count to 10 H CHECK that the selected line is the first line that has the color burst signal e Check sync trigger H Using the Vert...

Page 117: ...urement Accuracy Averaged on page 1 20 Procedure 1 Install the test hookup and preset the instrument controls Figure 4 21 Initial Test Hookup a Hook up test signal Install the standard accessory probe on CH 1 Connect the probe tip to PROBE ADJ on the front panel leave the probe ground unconnected b Initialize the oscilloscope H Press save recall SETUP H Press the main menu button Recall Factory Se...

Page 118: ... the side menu its icon is shown at the left Press the side menu button Amplitude H Repeatedly press the side menu button more until Frequency appears in the side menu its icon is shown at the left Press the side menu button Frequency H Press CLEAR MENU to remove the menus from the display See Figure 4 22 Figure 4 22 Measurement of Probe Compensator Limits b Check against limits CHECK that the CH ...

Page 119: ...Performance Tests Performance Verification 4Ć50 ...

Page 120: ...Adjustment Procedures ...

Page 121: ... can also use this procedure to optimize the performance of the oscilloscope This procedure is not required to verify the oscilloscope conforms with its warranted characteristics performance verification procedures are found in Section 4 Adjustment Interval As a general rule these adjustments should be done every 2 000 hours of operation or once a year if used infrequently Before you do this proce...

Page 122: ...gh density floppy drive 3 5 inch 1 44 M or 5 25 inch 1 2 M H A GPIB board National InstrumentsR GPIB PCII GPIB PCIIA or GPIB PCII IIA A PC GPIB package that includes the PCII IIA is avail able Tektronix part number S3FG210 H Suitable keyboard and monitor Test Equipment The equipment list on page 5 5 lists all test equipment required to adjust this oscilloscope The following topics cover what is re...

Page 123: ...ponse Adjustment H Trigger Skew Adjustment All these software based adjustments are made internally by the adjustment software and all adjustments are done without removal of the oscilloscope cabinet Partial Adjustment The adjustment software allows you to make individual adjustments Howev er usually all adjustments are made unless you are adjusting circuits in the course of troubleshooting the os...

Page 124: ...justments depend on the successful prior completion of other adjust ments For example the Voltage Reference Adjustment must pass before any other adjustments can be successfully completed The following table lists the adjustments and their dependencies Table 5 2 Adjustments and Dependencies Adjustment Prior Completion Requirements Voltage Reference Adjustment None Low Frequency Response Adjustment...

Page 125: ...ent 5 Attenuator 10X two required Ratio 10X impedance 50 W connectors female BNC input male BNC output Tektronix part number 011 0059 02 Software based adjustments and probe adjustment 6 Attenuator 2X Ratio 2X impedance 50 W connectors female BNC input male BNC output Tektronix part number 011 0069 02 Software based adjustments 7 Cable GPIB IEEE Std 488 1 1987 IEEE Std 488 2 1987 Tektronix part nu...

Page 126: ...robe 10X included with this instrument A P6138 probe Tektronix number P6138 Signal interconnection 15 Photometer 0 1 to 200 Footlamberts 0 343 to 686 Candelas TEKTRONIX J16 Photometer with J6503 Luminance Probe Contrast adjustment 16 Graticule external TEKTRONIX 067 0206 00 TEKTRONIX 067 0206 00 A26 Monitor linearity check 17 Generator pulse High amplitude pulse with variable amplitude of 60 V to ...

Page 127: ...his installation program uses parameters you supply see step 2 substep c to create a custom start up file on your hard disk directory After installation you will be instructed to run this start up batch file whenever you do software based adjustments so it can configure your computer properly before it runs the adjustment program Do not simply copy the software files from one computer to another s...

Page 128: ...ain menu button System until I O is high lighted in the pop up menu c Press the side menu button TALK LISTEN d Use the General Purpose knob to set any address between 0 and 29 3 Let the oscilloscope warm up Allow a 20 minute warm up period before you begin step 4 4 Start the adjustment software a Change drives to your hard drive b Change directories to TDS400 ADJ c Type ADJ400 d Follow the instruc...

Page 129: ...okup and preset the oscilloscope controls Figure 5 1 Hookup for Probe Compensation a Hook up test signal source Install the standard accessory probe to CH 1 Connect the probe tip to PROBE ADJ on the front panel leave the probe ground unconnected b Initialize the oscilloscope H Press save recall SETUP H Press the main menu button Recall Factory Setup H Press the side menu button OK Confirm Factory ...

Page 130: ...nsation 2 Compensate the Probe a Locate the probe compensation hole in the side of the probe body b Using the probe compensation tool adjust the probe for best square wave compensation flat as possible across the top of the waveform Probe compensated correctly Probe over compensated Probe under compensated Figure 5 3 Proper and Improper Probe Compensation ...

Page 131: ...e BNC adapter Item 2 one 50 W BNC to probe tip adapter Item 3 and one P6138 10X probe Item 14 Equipment Required TDS 460 Only One high frequency sine wave generator with its leveling head Item 13 one BNC female to female BNC adapter Item 2 one 50 W BNC to probe tip adapter Item 3 and one P6138 10X probe Item 14 Procedure 1 Install the test hookup and preset the oscilloscope controls First pull for...

Page 132: ...ial Test Hookup TDS 460 Only b Hook up test signal source H TDS 410 and TDS 420 Only Connect the output of a medium frequency sine wave generator through a 50 W precision cable to a BNC female to female BNC adapter see Figure 5 5 H TDS 460 Only Connect the output of a high frequency sine wave generator through its leveling head to a BNC female to female BNC adapter see Figure 5 6 H Connect the BNC...

Page 133: ...u button Select Measurement for Ch1 H Repeatedly press the side menu button more until Pk Pk appears in the side menu Press the side menu button Pk Pk H Press CLEAR MENU 2 Confirm probe bandwidth a Display and measure the test signal H TDS 410 and TDS 420 Only Monitor the CH 1 Pk Pk readout while you set the output of the generator for a 600 mV 6 divi sion 50 kHz reference signal H TDS 460 Only Mo...

Page 134: ...dwidth Probe adjustment is complete Equipment Required TDS 410 and TDS 420 Only One pulse generator Item 17 one 50 W precision cable Item 9 one BNC female to female BNC adapter Item 2 one 50 W BNC to probe adapter Item 3 and one P6138 10X probe Item 14 Also required is the probe adjustment tool included with the P6138 probe accessories Equipment Required TDS 460 Only One pulse generator Item 17 on...

Page 135: ... tip H Follow the instructions in Figure 5 7 to remove the probe body covers Calibration Generator Output Figure 5 8 Initial Test Hookup TDS 410 and TDS 420 Only Calibration Generator Tunnel Diode Pulser 10X attenuator Precision Cable Output Figure 5 9 Initial Test Hookup TDS 460 Only b Hook up test signal source TDS 410 and TDS 420 Only H Connect the high amplitude output of a calibration generat...

Page 136: ...le to 50 W coupling H Press SHIFT Then press ACQUIRE MENU H Press the main menu button Mode Then press the side menu button Hi Res H Press CLEAR MENU 2 Adjust the Probe a Display and store the reference signal H TDS 410 and TDS 420 Only Set the high amplitude output of the generator for a six division square wave on screen see Figure 5 10 H TDS 460 Only Set the high amplitude output of the generat...

Page 137: ... Probe Test Hookup TDS 460 Only H Press MORE Then push the main menu button Ref 1 b Display the test signal H TDS 460 Only Disconnect the tunnel diode pulser at CH 1 and remove the 10X attenuator H TDS 460 Only Connect the output of the tunnel diode pulser through a BNC female to BNC female adapter to a BNC to probe tip adapter H TDS 410 and TDS 420 Only Disconnect the calibration genera tor at CH...

Page 138: ...ch the response of the Ref 1 waveform Note that it is more important to match the response during the first 5 ns than during the entire first 20 ns the adjustments affect H See Figure 5 13 to see what areas on the front corner that the various adjustments affect LF Comp R1 R2 C1 Not Used Figure 5 12 Locations of Probe Adjustments d Recheck Probe Bandwidth H Redo the procedure Measure the Probe Ban...

Page 139: ...h Second adjust C1 for best match between front corners Third repeat the first two steps as needed due to interaction between adjustments Figure 5 13 Adjustments vs Front Corner Response 3 Disconnect the hookup Unplug the probe from the BNC to probe tip adapter Reverse the instructions in Figure 5 4 page 5 11 to reinstall the retractable probe tip ...

Page 140: ... is listed in Table 5 3 Equipment Required One J16 Photometer with a J6503 Luminance Probe Item 15 one monitor adjustment tool Item 4 and an external graticule Item 16 Procedure 1 Access the inside of the oscilloscope See Removal and Installation Procedures in Section 6 to remove the cabinet 2 Adjust the vertical and horizontal sync a If the display rolls vertically adjust V SYNC R453 to the cente...

Page 141: ...press the main menu button Area until Display is highlighted in the pop up menu H Repeatedly press the side menu button more until Circle appears in the side menu Push Circle H Press the main menu button EXECUTE Then press the side me nu button Ok Confirm Run Test b Make the brightness adjustment H Locate R482 BRITE see Figure 5 14 H PHASE 463 Front of Instrument Left Side of Instrument V POS R445...

Page 142: ...y press the side menu button more until White Box appears in the side menu Push White Box H Press the main menu button EXECUTE Then press the side me nu button Ok Confirm Run Test 10 Patch 5 Patch Figure 5 15 Five and Ten Percent Luminance Patches b Make the contrast adjustment H Locate R483 VID GAIN on the A26 Monitor assembly see Figure 5 14 H Monitor the luminance at center screen using a J16 p...

Page 143: ...e menu Push Composite H Press the main menu button EXECUTE Then press the side me nu button Ok Confirm Run Test b Make the focus adjustment H Locate R411 FOCUS see Figure 5 14 H Adjust R411 for best overall focusing at all four corners and at the center of the screen see Figure 5 16 All Four Corners Center Figure 5 16 Composite Pattern for Focusing 6 Adjust the display position and size a Display ...

Page 144: ...est b Make the position and size adjustment H Place the external graticule 16 over the front of the CRT H Locate the R443 V POS R452 V SIZE R463 H PHASE and L310 H SIZE controls see Figure 5 14 H Adjust the external graticule horizontally and vertically and if necessary R443 R452 R463 and L310 so that the centers of the outer boundaries of the displayed 16 12 test pattern are within the limits mar...

Page 145: ...nt Procedures TDS 410 TDS 420 TDS 460 Technical Reference Manual 5Ć25 External Graticule with Marked Limit Lines 16 12 Test Pattern on the CRT Limit Lines Test Pattern Figure 5 17 External Graticule Limit Lines ...

Page 146: ...of the displayed 16 12 test pattern are within the limits marked on the external grati cule If the lines can not be adjusted within those limits replace the A26 Monitor assembly module H If necessary perform step 6 again 8 Restore the oscilloscope to normal operation a Restore the dip switch to the settings that follow Switch No 1 2 3 4 5 6 7 8 Open Closed X X X X X X X X b Power off the oscillosc...

Page 147: ...Maintenance ...

Page 148: ...olation to a module Service personnel must be prepared to safely service the oscilloscope This manual is for qualified service personnel only Read the Safety Summary at the front of this manual If you are unfamiliar with the operation of this oscillo scope read Operating Information before servicing the oscilloscope To prevent electro static damage ESD read Preventing ESD on page 6 2 before servic...

Page 149: ...ntains static sensitive modules 3 Discharge the static voltage from your body by wearing a grounded antistatic wrist strap while handling these modules Do service of static sensitive modules only at a static free work station 4 Do not remove the oscilloscope cabinet unless you have met precaution number 3 above Consider all internal modules static sensitive 5 Nothing capable of generating or holdi...

Page 150: ... linear microcircuits with MOS inputs most sensitive 1 ECL 2 Schottky signal diodes 3 Schottky TTL 4 High frequency bipolar transistors 5 JFET 6 Linear microcircuits 7 Low power Schottky TTL 8 TTL least sensitive 9 1Voltage equivalent for levels voltage discharged from a 100 pF capacitor through resis tance of 100 ohms 1 100 to 500 V 6 600 to 800 V 2 200 to 500 V 7 400 to 1000 V est 3 250 V 8 900 ...

Page 151: ...Maintenance Information Maintenance 6Ć4 ...

Page 152: ...pe The front cover protects the front panel and display from dust and damage Install the front cover when storing or transporting the oscilloscope Inspect and clean the oscilloscope as often as operating conditions require The collection of dirt on components inside can cause them to overheat and breakdown Dirt acts as an insulating blanket preventing efficient heat dissipation Dirt also provides ...

Page 153: ...en shells cracked insulation and deformed contacts Dirt in connectors Replace defective modules Clear or wash out dirt Carrying handle and cabinet feet Correct operation Replace defective module Accessories Missing items or parts of items bent pins broken or frayed cables and damaged connectors Replace damaged or missing items frayed cables and defective modules Cleaning Procedure Exterior CAUTION...

Page 154: ...uit run plating Remove the failed module and replace it with a fresh module Resistors Burned cracked broken or blistered condition Remove the module with the faulty resistor and replace it with a fresh module Solder connections Cold solder or rosin joints Resolder joint and clean with isopropyl alcohol Capacitors Damaged or leaking cases Corroded sol der on leads or terminals Remove the module wit...

Page 155: ...he dust or dirt the oscilloscope may be spray washed using a solution of 75 isopropyl alcohol by doing steps 4 through 8 4 Gain access to the parts to be cleaned by removing easily accessible shields and panels see Removal and Installation Procedures 5 Spray wash dirty parts with the isopropyl alcohol and wait 60 seconds for the majority of the alcohol to evaporate 6 Use hot 120_ F to 140_ F deion...

Page 156: ... preparatory information that you need to properly do the procedures that follow H A list of equipment required to remove all modules H Procedures for removal and reinstallation of the electrical and mechanical modules H A disassembly procedure for removal of all the major modules from the oscilloscope at one time and for reassembly of those modules into the oscilloscope A complete disassembly is ...

Page 157: ...re referenced If you are disassembling this oscilloscope for cleaning go to the procedure Disassembly for Cleaning on page 6 62 If you are removing a module for service begin by doing the procedure Access Procedure page 6 13 By following the instruc tions in that procedure you remove the module to be serviced while removing the minimum number of additional modules Summary of Procedures The procedu...

Page 158: ...e removal procedures just described that removes all modules for cleaning Instructions for cleaning are found in Inspection and Cleaning which begins this section The Disassembly for Cleaning procedure does not use the access procedure NOTE Read the cleaning procedure before disassembling the oscilloscope for cleaning Figure 6 1 Oscilloscope Orientation ...

Page 159: ... for removal of the cabinet handle 4 Flat bladed screwdriver Screwdriver for removing screws that have standard heads 5 Needle nose pliers Standard tool Used for removing EMI gaskets 6 Duck bill pliers 4 inch Used for removing the low voltage power supply 7 Nut driver 5 16 inch Used for removing earth ground cables 8 Angle tip tweezers Used for knob and shaft removal 9 Flat bladed spudger A probe ...

Page 160: ... H Skip to the end of this procedure step 3 for reinstallation instruc tions b If you have found the module to be removed in either Figure 6 3 or Figure 6 4 cabinet removal is required H First do Line Fuse and Line Cord on page 6 23 removing only the line cord H Then do Front Cover Rear Cover Cabinet Rear EMI Gasket and Cabinet Handle and Feet on page 6 24 removing only the rear cover and cabinet ...

Page 161: ...nly the module you want to service 3 Front Cover Rear Cover Cab inet Rear EMI Gasket and Cabinet Handle and Feet 6 24 1 Do Line Fuse and Line Cord removing only the line cord 2 Do the procedure listed at left removing only the module s you want to service 4 Trim Ring Menu Elastomer Menu Buttons and Front EMI Gaskets 6 28 1 Do Line Fuse and Line Cord removing only the line cord 2 Do Front Cover Rea...

Page 162: ...Gasket Fuse Cap Line Fuse Line Cord Rear Cover Rear Foot 2 Front Cover Optional ESD Shield Trim Ring Menu Button Elastomer Menu Flex Circuit A06 Front Panel Assembly Front Panel Knobs Shafts Front EMI Gaskets 4 Probe Code Flex Assembly Cabinet Menu Button Mounting Screw Figure 6 2 Cabinet and Front Panel Mounted Modules ...

Page 163: ... 2 Do the procedure listed at left to remove the module 6 A09 DSP Assembly 6 45 1 Do A08 Jumper Board Assembly D1 Bus and Board Sup ports Do not remove the A08 jumper board assembly 2 Do the procedure listed at left to remove the module 7 A01 Backplane Assembly and its Mount 6 46 1 Do A08 Jumper Board Assembly D1 Bus and Board Sup ports Do not remove the A08 jumper board assembly 2 Do in order the...

Page 164: ...ilter A01 Backplane Assembly A02 Display Assembly Mounting Screws A09 DSP Assembly Board Support 3 A04 Acquisition Assembly Mounting Screw A08 Jumper Assembly A05 Attenuator Assembly Mounting Screw Mounting Screw BNC Connector Mounting Screw Battery 2 Battery Clamp 2 Cable Retainer Mounting Screw Mount Backplane and LV Power Supply Attenuator Shield D1 Bus A03 CPU Assembly Figure 6 3 Internal Modu...

Page 165: ...le 3 Backplane to Low Voltage Power Supply 1 Reach in from the top of the oscilloscope and unplug the cable at the jacks at the front of the backplane and low voltage power supply modules 2 Reverse these instructions to install the replacement cable 4 Aux Supply to Line Filter Aux Supply to Low Voltage Power Supply 1 Find the procedure A07 Auxiliary Power Supply in Table 6 6 2 Follow the access in...

Page 166: ...Find the procedure A02 Display Assembly in Table 6 6 2 Follow the access instructions found there to access and remove the display assembly The cable is unplugged from that assembly in the process 3 Unplug the cable from the monitor See Figure 6 4 for jack location 4 Unplug the cable from the auxiliary power supply See Fig ure 6 4 for jack location 5 Reverse these instructions to install the repla...

Page 167: ...lane to Aux Power Supply Aux Supply to Line Filter Line Filter to Ground Lug Aux Supply to Low Voltage Power Supply to Ground Lug D1 Bus Backplane to Attenuator Soldered at Backplane CPU to Front Panel Backplane to Acquisition Soldered at Backplane Backplane to Front Panel Figure 6 4 Cables and Cable Routing ...

Page 168: ...Grasp any knob you wish to remove and pull it straight out from the front panel slightly to create some clearance between the base of the knob and the front panel b Insert the tweezers between the knob and front panel and use them to remove the knob and its shaft 4 Disassemble the knob and shaft Pull the shaft out of the knob 5 Reinstallation a To reinstall align the inside of the knob to the end ...

Page 169: ...emoval and Installation Procedures Maintenance 6Ć22 When reinstalling the knobs note there are two sizes Be sure to reinstall the proper size knob in the proper location Figure 6 5 Knob and Shaft Removal ...

Page 170: ...ne cord in the locator diagram Cabinet and Front Panel Mounted Modules Figure 6 2 2 Orient the oscilloscope Set the oscilloscope so its bottom is down on the work surface and its rear is facing you If you are servicing the line cord do the next step if you are servicing the line fuse skip to step 4 1 Unplug 2 Rotate 3 Pull Line Fuse Line Cap Figure 6 6 Line Fuse and Line Cord Removal 3 Remove line...

Page 171: ...l out on both of the hubs on the cabinet handle to unlock it for positioning While holding the hubs unlocked rotate the handle towards the bottom of the oscilloscope b Set the oscilloscope so its face is down with its front cover on the work surface and its bottom facing you Reference Figure 6 7 on page 6 25 as you do the following steps 3 Remove the front feet If removing a front foot for replace...

Page 172: ...t of the cabinet Front Foot Ro tate and remove Handle Assembly Remove the internal screws and pull out handle hubs to remove Mounting Screws 4 Label Label Mounting Screw Figure 6 7 Front Cover Rear Cover Cabinet EMI Gasket and Cabinet Handle and Feet Removal c While holding the handle hubs pulled out lift the cabinet upwards to slide it off the oscilloscope ...

Page 173: ...e oscilloscope cabinet carefully follow the instructions given Unless the instructions are performed properly the oscilloscope may not meet its emissions requirements EMI 8 Remove the EMI gasket If removing the EMI gasket for replacement do the following substeps a Locate the EMI gasket to be removed in the diagram Front Cover Rear Cover Cabinet EMI Gasket and Cabinet Handle and Feet Removal Figur...

Page 174: ...scope be sure that the ridge around the rear of the main chassis slides into the groove containing the EMI gasket on the rear of the cabinet H Install the four screws at the rear panel and tighten to 8 inch lbs torque before installing the single screw at the left side of the cabinet Tighten this screw to 8 inch lbs d If installing a new rear panel also do the following H Find the appropriate labe...

Page 175: ...d snap it off of the front of the oscilloscope When reinstalling align and snap the cover back on Trim Ring To remove grasp its back edge and press up on its two tab locks Flex the trim ring upward then pull it forward Repeat for the bottom edge of the trim ring Menu Elastomer Menu Button 17 Trim Ring Tab Lock Figure 6 8 Trim Ring Menu Elastomer and Menu Buttons Removal DO NOT touch the carbon con...

Page 176: ...rbon contact points on the elastomer c Without installing the EMI gaskets align the trim ring to the front of the chassis and push it on to seat Be sure that both pairs of flex locks one pair each at the inside top and bottom of the trim ring snap over the edge of the chassis d Do the following subparts to install the EMI gaskets see Figure 6 9 H Install the front cover on the oscilloscope H Lay t...

Page 177: ... f See the following procedures to install those modules removed by the access procedure H Front Cover Rear Cover Cabinet Rear EMI Gasket and Cabinet Handle and Feet page 6 24 to reinstall the cabinet and rear cover H Line Fuse and Line Cord page 6 23 to reinstall the line cord which completes the oscilloscope reassembly ...

Page 178: ...nto the slot at the front right of the chassis Push inwards to release the snap lock at the right side b Lift the front panel assembly out of the front of the main chassis until you can reach the interconnect cables connecting it to various other modules c Unplug the following cables from their jacks on the front panel assem bly H The CPU to front panel cable at J101 H The menu flex circuit at J10...

Page 179: ...onents removed in step 7 are not field replaceable Otherwise skip to step 9 to continue this procedure 7 Further disassembly of front panel assembly If the front panel or the front panel buttons are to be serviced do the following substeps a Remove the front panel control knobs from the front panel assembly using the method described in Front Panel Knobs and Shafts on page 6 21 b Release the three...

Page 180: ...ontrol potentiometer s If removing them for cleaning they are not field replaceable unplug the four control potentiometers from the back of the front panel assembly Perform step 9 only if replacing a failed or damaged menu flex circuit with a fresh unit from the factory Removal of the circuit is likely to destroy it If such is not the case skip to step 10 to continue this procedure 9 Remove the me...

Page 181: ...embly was disassembled for cleaning in step 7 apply a thin coating of bearing grease Dow Corning 1292 to the two switch patterns circular patterns for the vertical scale rotary switches on the circuit board Then reverse substeps 7a 7d to reassemble using Figure 6 11 as a guide e Do in reverse order substeps 4a through 4d reversing the procedure outlined in each step Be sure to dress the CPU to fro...

Page 182: ...ane to attenuator cable at J101 b Using Figure 6 12 as a guide remove the four T 15 TorxR screws securing the attenuator assembly to the front of the chassis c Lift the attenuator assembly away from the oscilloscope to complete its removal Mounting Screws 4 Attenuator Shield A05 Attenuator Assembly Figure 6 12 A05 Attenuator Removal ...

Page 183: ...eplace modules removed by the access procedure H A06 Front Panel Assembly ESD Shield and Menu Flex and Probe Code Flex Circuits on page 6 31 H Trim Ring Menu Elastomer Menu Buttons and Front EMI Gas kets on page 6 28 H Front Cover Rear Cover Cabinet Rear EMI Gasket and Cabinet Handle and Feet page 6 24 to reinstall the cabinet and rear cover H Line Fuse and Line Cord page 6 23 to reinstall the lin...

Page 184: ...ou WARNING Monitor assembly handling Use care when handling a monitor If you break its display tube it may implode scattering glass fragments with high velocity and possibly injuring you Wear protective clothing including safety glasses preferably a full face shield Avoid striking the display tube with or against any object Monitor storage Store the monitor with its display tube face down in a pro...

Page 185: ...ll the left corner of the trim ring forward slightly The left top tab lock is shown in Figure 6 8 on page 6 28 f Tilt the rear of the monitor assembly upward slightly Slide the moni tor assembly back in the main chassis until it stops about 3 4 inch Now lift it straight up out of the the top of the main chassis to com plete the removal g While heeding the WARNING on monitor handling that immediate...

Page 186: ...Removal and Installation Procedures TDS 410 TDS 420 TDS 460 Service Manual 6Ć39 A26 Monitor Assembly Mounting Screws 6 Monitor Frame EMI Clip Figure 6 13 A26 Monitor Assembly Removal ...

Page 187: ...e removed Find the modules to be removed in the locator diagram Internal Modules Figure 6 2 on page 6 15 or in Figure 6 4 on page 6 20 2 Orient the digitizing oscilloscope Set the digitizing oscilloscope so its left side is down with its front facing to the left of you 3 Remove the board supports Depress the snap lock at the bottom end of the board support and tilt the support outwards to remove f...

Page 188: ...ve handy a screwdriver with a size T 15 TorxRtip Items 1 and 2 Locate the modules to be removed in the locator diagram Internal Modules Figure 6 2 page 6 15 3 Orient the digitizing oscilloscope Set the digitizing oscilloscope so its left side is down with its front facing to the left of you 4 Remove the CPU board Using Figure 6 15 as a guide perform the following substeps a Unplug the CPU to front...

Page 189: ... inch 6 35 mm than the screws 0 625 inch 15 875 mm removed in substeps b and c Be sure to install the short screw in its proper location when reinstalling the board See Figure 6 15 e Grasp the board by its edge and pull outward to unplug it from J3 of the backplane assembly f Slide the board part way out until you can reach the battery cable at J5 Unplug the battery cable g Slide the board the res...

Page 190: ...e cord which completes the oscilloscope reassembly A02 Display Assembly 1 Access the module Be sure you have performed the Access Procedure on page 6 13 and removed the modules as instructed 2 Assemble equipment and locate modules to be removed Have handy a screwdriver with a size T 15 TorxR tip Items 1 and 2 Locate the modules to be removed in the locator diagram Internal Modules Figure 6 3 on pa...

Page 191: ... to unplug it from J4 of the backplane assembly to complete the removal A02 Display Assembly Mounting Screw Short Display Assembly Mounting Screw Display Assembly Mounting Screw CPU Assembly D1 Bus Removed by the Access Procedure Figure 6 16 A02 Display Assembly Removal 5 Reinstallation a Perform in reverse order substeps 4a 4e reversing the removal instructions in each substep to reinstall the as...

Page 192: ...g oscilloscope so its left side is down with its front facing to the left of you 4 Remove the DSP Assembly Use Figure 6 17 as a guide perform the following substeps a Unplug the battery backup cable at J5 b Remove the single T 15 TorxR screw from the bracket that secures the display assembly at the inside rear corner of the main chassis c Remove the single T 15 TorxR screw from the bracket that se...

Page 193: ...to reinstall the assembly b See the following procedures in the order listed to replace modules removed by the access procedure H A08 Jumper Board Assembly D1 Bus and Board Supports on page 6 40 board supports and D1 bus only H Front Cover Rear Cover Cabinet Rear EMI Gasket and Cabi net Handle and Feet page 6 24 to reinstall the cabinet and rear cover H Line Fuse and Line Cord page 6 28 to reinsta...

Page 194: ...respond to unused board slots in the backplane assembly For any unused bracket do the following subparts to remove it H Remove the single T 15 TorxR screw that secures the used bracket at the inside rear corner of the main chassis H Working from the rear of the oscilloscope remove the single T 15 TorxR screw from the bracket that secures the DSP as sembly to the rear of the main chassis b Unplug t...

Page 195: ...Turn the digitizing oscilloscope so its bottom is facing down on the work surface Leave its front facing to the left i Find the flex lock nearest the front of the digitizing oscilloscope Using a flat bladed screwdriver push the flex lock so it flexes enough to clear the board j While holding the flex lock slightly pull up on the front corner of the board nearest that retainer until the board clear...

Page 196: ... their slots in the bottom of the chassis when doing step 4l H Be sure to align the board to the retainer slot when doing step 4k H Seat the board until the four retainers snap over the edge of the backplane assembly when doing substep 4j b See the following procedures in the order listed to replace modules removed by the access procedure H A08 Jumper Board Assembly D1 Bus and Board Supports on pa...

Page 197: ... the oscilloscope is adjusted are not lost 1 Assemble equipment and locate modules to be removed Locate the back up battery to be removed in the locator diagram Internal Modules Figure 6 3 page 6 17 2 Orient the digitizing oscilloscope Set the digitizing oscilloscope so its top is down on the work surface with its right side facing you 3 Remove back up battery 1 Unplug the back up battery cable at...

Page 198: ... Handle and Feet page 6 24 to reinstall the cabinet and rear cover H Line Fuse and Line Cord page 6 28 to reinstall the line cord which completes the oscilloscope reassembly A25 Low Voltage Power Supply and its Mount 1 Access the module Be sure you have performed the Access Procedure on page 6 13 and removed the modules as instructed 2 Locate modules to be removed a Have handy a screwdriver with a...

Page 199: ... d Using a pair of duck bill pliers squeeze to release each of the four flex locks at the top edge of the low voltage power supply assembly e Once released tilt the board out away from the flex locks and un plug the AC power cable where it connects to the cable from the low voltage power supply f Lift the low voltage power supply assembly out of the chassis to complete its removal To Aux Pow er Su...

Page 200: ...removed do the following subparts H Do in reverse order substeps 5a 5c reversing the removal instructions in each substep to reinstall the assembly H See A02 Display Assembly on page 6 43 to reinstall that as sembly H See A09 DSP Assembly on page 6 45 to reinstall that assembly H See A08 Jumper Board Assembly D1 Bus and Board Supports on page 6 40 to reinstall the board supports and D1 bus only b ...

Page 201: ...se the two flex locks securing the top of the fan to the fan mount then lift the fan out from the top of the chassis c When reinstalling the fan be sure the two locks snap into place to secure the fan DO NOT do step 5 unless servicing a broken fan mount or removing that mount for cleaning 5 Remove the fan mount a Rotate the digitizing oscilloscope so the side that houses the fan mount is facing up...

Page 202: ... 5d reversing the removal instructions in each substep to reinstall the fan mount Be sure to seat the fan mount so its two flex locks snap to secure it on the chassis b Do in reverse order substeps 4a 4c to reinstall the fan c See the following procedures to replace the modules removed by the access procedure H Front Cover Rear Cover Cabinet Rear EMI Gasket and Cabi net Handle and Feet page 6 24 t...

Page 203: ...e line filter in the locator diagram Internal Modules Figure 6 3 page 6 17 2 Orient the digitizing oscilloscope Set the digitizing oscilloscope so its bottom is down on the work surface and its rear is facing you 3 Remove the line filter Refer to Figure 6 22 when doing the following substeps a Unplug the three connectors at the line filter b Remove the two screws mounting the line filter to the ch...

Page 204: ... you have done so be sure to install the earth lead and its nut from the line filter before installing the earth lead and its nut from the low voltage power supply a Do in reverse order substeps 3a 3b reversing the removal instruc tions in each substep to reinstall the assembly b See the following procedures to replace the modules removed by the access procedure H Front Cover Rear Cover Cabinet Re...

Page 205: ...upply Reference Figure 6 23 while doing the following substeps a Unplug the monitor power cable at J4 the fan power cable at J3 the cable from the backplane assembly at J7 and the cable from the low voltage power supply assembly at J1 b Now release and disconnect the remote power cable where it joins the cable from the low voltage power supply assembly c Unplug the two connectors at the line filte...

Page 206: ...4d reversing the removal instructions in each substep to reinstall the assembly Be sure to seat the board until the two mounting posts snap locked on the assembly when reinstalling b See the following procedures in the order listed to replace modules removed by the access procedure H A08 Jumper Board Assembly D1 Bus and Board Supports on page 6 40 board supports and D1 bus only ...

Page 207: ...ormed the Access Procedure on page 6 13 and removed the modules as instructed 2 Assemble equipment and locate modules to be removed Have handy a screwdriver with a size T 15 TorxR tip Items 1 and 2 Locate the acquisition assembly in the locator diagram Internal Modules Figure 6 3 on page 6 17 3 Orient the digitizing oscilloscope Set the digitizing oscilloscope so its bottom is up with its front fa...

Page 208: ...to reinstall the assembly b See the following procedures in the order listed to replace modules removed by the access procedure H A08 Jumper Board Assembly D1 Bus and Board Supports on page 6 40 to install the jumper board and D1 bus only H Front Cover Rear Cover Cabinet Rear EMI Gasket and Cabi net Handle and Feet page 6 24 to reinstall the cabinet and rear cover H Line Fuse and Line Cord page 6 ...

Page 209: ...T 20 TorxR tip Item 3 a flat bladed screwdriver Item 4 a pair of angle tip tweezers Item 8 duck bill pliers Item 6 flat bladed spudger Item 9 and a soldering iron Item 10 b Familiarize yourself with the modules illustrated in Figures 6 2 6 3 and 6 4 2 Remove all modules Do in the order listed the following procedures They are found under Procedures for Module Removal and Installation which starts ...

Page 210: ...s that require connecting a cable or bus to a module that you have not yet installed You will make the necessary connections when you install the miss ing module later H Ignore any instructions to do the Access Procedure The access procedure is only used when removing individual modules for servic ing not when doing a disassembly reassembly for cleaning H Ignore any instructions directing you to s...

Page 211: ...ge 6 43 m A25 Low Voltage Power Supply and its Mount page 6 51 n Fan and Fan Mount page 6 54 o Trim Ring Menu Elastomer Menu Buttons and Front EMI Gaskets page 6 28 p A06 Front Panel Assembly ESD Shield and Menu Flex and Probe Code Flex Circuits page 6 31 q Front Cover Rear Cover Cabinet Rear EMI Gasket and Cabinet Handle and Feet page 6 24 ...

Page 212: ...module and or interface use the troubleshooting proce dures in this section to determine which module needs to be replaced The two levels of diagnostics are the short confidence set and an extended set that tests the oscilloscope circuitry in depth and takes more time At power up the oscilloscope automatically executes the short set The ex tended set is optional and is executed by using the follow...

Page 213: ... of the Protection switch to the unpro tected position before updating the firmware Figure 6 25 shows how to set the switch After loading the firmware be sure you set both switches back to the protected position and cycle power If you want to order a firmware update see Optional Accessories in Sec tion 10 Mechanical Parts List for the part number Flip both switch levers toward the board closed to ...

Page 214: ...DS 410 and TDS 420 or 350 MHz for the TDS 460 digitizing oscil loscope TEKTRONIX TDS 410 TDS 420 or TDS 460 General troubleshoot ing Console Port Set Up The console port allows you to see detailed diagnostic messages when faults in the oscilloscope prevent display of the normal diagnostics Use this proce dure to set up the console port NOTE You may need a DB 9 to DB 25 adaptor null modem adaptor g...

Page 215: ... see Figure 6 26 and using an extender cable or adaptors to the RS 232 serial port of your personal computer or RS 232 terminal 5 Configure the personal computer a Load the software Load telecommunication terminal software into your personal computer b Select the software port Configure the telecommunication software so that it accesses the serial port that you connected to the console port Com1 o...

Page 216: ...e Diagnostic messages are echoed to the personal computer display Tektronix part number 131 0569 00 Console Port part number 174 2613 00 Tektronix part number 131 1006 00 Tektronix part number 200 1170 00 Tektronix part number 200 1667 00 Tektronix part number 175 2767 00 Figure 6 26 Console Port Connections ...

Page 217: ...witches of S1 back to the closed position and cycle power Is the display readable and stable Yes No No Yes Yes No Perform the Monitor troubleshooting procedure There is something wrong with the ON STBY button Perform the Backplane troubleshooting procedure No Yes Power off the oscilloscope and remove its cabinet using the Front Cover Rear Cover Cabinet Rear EMI Gasket and Cabinet Handle and Feet r...

Page 218: ...Troubleshooting TDS 410 TDS 420 TDS 460 Service Manual 6Ć71 Pin 1 Pin 3 Pin 32 P1 Figure 6 28 A03 CPU Board Connector P1 ...

Page 219: ...rs Select the extended diagnostics menu and run all the tests see the discussion of the diagnostics on page 6 65 Are any failures reported The oscilloscope is ok Yes No Is the selected module the A05 Attenuator A04 Acquisition or the A08 Jumper board Using the troubleshooting procedures did you find a faulty module PerformtheAttenuator Acquisition and Acquisition and Attenuator Power troubleshooti...

Page 220: ...plane D1 Cable Acq Cable Attn Cable Attn Acq Jumper Board Front Panel Cables Fp Cpu 1 2 3 4 5 Cal Initialization 1 Cpu Dsp or AT bus 2 1 3 4 Dsp 1 2 4 3 Cpu Dsp Dsy or D1 bus 3 1 4 2 Cpu Dsp Dsy or AT bus 1 2 3 4 Dsy 3 1 4 2 Cpu Attn or I2C bus 2 1 5 4 3 Attn 1 3 2 Cpu Acq D1 I2C bus 5 4 1 2 3 Acq 3 1 4 5 2 Acq Attn 2 3 4 1 Fp Cpu 3 2 1 ...

Page 221: ... outlet Replace the line filter Fix the power problem Are all secondary voltages within specification see Table 6 11 and Figure 6 32 Replace either the A01 Backplane or the A03 CPU boards Press principal power switch S1 to the off out position Disconnect the cable P2 to the A01 Backplane Connect a minimum 1 A load to the 5 V supply Press principal power switch S1 to the on in position Are the seco...

Page 222: ...ng TDS 410 TDS 420 TDS 460 Service Manual 6Ć75 Table 6 11 Normal Output Voltage Supply J2 Pin Minimum Output Maximum Output 5 1 V 20 5 05 V 5 15 V 15 V 8 14 85 V 15 15 V 6 4 V 6 6 35 V 6 45 V 15 V 2 14 85 V 15 15 V ...

Page 223: ...rd or cable is removed Replace board or cable that has the fault Does the supply work ok when all boards and cables are removed Replace the A01 Backplane No Yes Does the supply work ok when the load is reduced by removing or disconnecting one or more boards or cables but not due to an overload or short on a specific board or cable Replace the A25 Low Voltage Power Supply Check the current drawn fr...

Page 224: ...ual 6Ć77 Table 6 12 Power Supply Maximum Current Supply J2 Pins Maximum Current 5 1 V 16 20 15 A 15 V 8 and 9 3 5 A 6 4 V 6 and 7 5 5 A 15 V 1 and 2 0 75 A J2 Pin 1 A25 Low Voltage Power Supply Figure 6 32 A25 Low Voltage Power Supply Module Right Side ...

Page 225: ...oting procedure Does pin 7 of the cable have a video signal with the same levels as Figure 6 35 No Yes No Yes This procedure helps you determine whether the A26 Monitor or the A02 Display module is bad Is J7 pin 1 at 15 V see Figure 6 37 Is J4 pin 1 at 15 V see Figure 6 37 Replace the A07 Auxiliary Power module No Yes Replace the cable Does J2 pin 7 on the A02 Display module see Figure 6 38 have a...

Page 226: ...anual 6Ć79 J2 pin 2 Horizontal Sync 31 75 kHz Rate J2 pin 4 Vertical Sync 60 Hz Rate Figure 6 34 Horizontal and Vertical Sync Signals J2 pin 7 Video Blanking Level White Level Black Level Figure 6 35 A Video Signal with White Black and Blanking Levels ...

Page 227: ...Troubleshooting Maintenance 6Ć80 J440 Figure 6 36 A26 Monitor Connector J440 J7 Pin 1 J4 Pin 1 Figure 6 37 A07 Auxiliary Power Connectors J4 and J7 ...

Page 228: ...Troubleshooting TDS 410 TDS 420 TDS 460 Service Manual 6Ć81 J2 Pin 1 Figure 6 38 A02 Display Connector J2 ...

Page 229: ...turn on at all No Yes No Yes Are the correct voltages at J101 and J106 see Figure 6 40 and Table 6 13 Replace the A06 FrontPanel module No Yes Does one front panel LED turn on and then turn off followed by the next LED until all LEDs have turned on and then turned off The A06 Front Panel board is ok Are all front panel cables securely installed in their sockets and are the cables ok Replace the A0...

Page 230: ...al 6Ć83 J101 Pin 1 J106 Pin 1 Figure 6 40 A06 Front Panel Board Power Connectors J101 and J106 Table 6 13 Front Panel Connector Voltages Connector Pin Nominal Voltage J101 Pins 2 and 4 5 1 V J106 Pin 1 15 V J106 Pin 2 5 1 V J106 Pin 4 5 V J106 Pin 5 15 V ...

Page 231: ...e front panel Set the trigger source to CH1 and press AUTOSET Set the Vertical SCALE to 10 mV Set your bench oscilloscope to 500 ms per division 200 mV per division bandwidth limit to 20 MHz and AUTO trigger The tested channel of the A05 Attenuator board is ok Repeat this procedure for each input channel Using the A08 Jumper Board Assembly D1 Bus and Board Supports removal procedure remove the A08...

Page 232: ...TRIG CH2TRIG CH1TRIG Vertical Signals Trigger Signals CH4SIGP CH4SIGN CH1SIGN CH1SIGP CH2SIGN CH2SIGP CH3SIGP CH3SIGN Figure 6 42 A08 Jumper and A05 Attenuator Boards Signal Locations Table 6 14 Channel and P1 Signal Locations Channel Number Trigger P1 Pin Number Vertical P1 Pin Number Vertical Inverted P1 Pin Number 1 26 27 29 2 18 19 21 3 10 11 13 4 2 3 5 ...

Page 233: ...re Using Table 6 15 and Figure 6 42 are the A05 Attenuator board power supply voltages ok Power to the A04 Acquisition and A05 Attenuator boards is ok No Yes Figure 6 43 Acquisition and Attenuator Power Troubleshooting Procedure Table 6 15 A05 Attenuator Board Power J101 Pin Voltage High Low 7 5 1 V 5 15 V 4 9 V 10 6 V 6 6 V 6 0 V 14 6 4 V 6 0 V 6 5 V 16 15 V 15 3 V 14 7 V 17 15 V 14 7 V 15 3 V Ta...

Page 234: ...Troubleshooting TDS 410 TDS 420 TDS 460 Service Manual 6Ć87 J7 Pin 1 Acquisition Board Figure 6 44 A04 Acquisition Board Power Connector ...

Page 235: ...e power up Yes No Replace either the A06 Front Panel A01 Backplane or A07 Auxiliary Power boards Are the voltages at U1 U4 ok see Table 6 17 and Figure 6 46 Replace the A01 Backplane module Are the voltages at J7 ok see Table 6 18 and Figure 6 46 No Yes There isn t a problem with the A01 Backplane Are the voltages at J8 ok see Table 6 19 Does one of the plug in boards not work but the other boards...

Page 236: ...U4 pin 3 5 V 4 8 V 5 2 V Table 6 18 J7 Voltages Pin Nominal Voltage Minimum Voltage Maximum Voltage 1 15 V 14 85 V 15 15 V 2 15 V 14 85 V 15 15 V 7 6 4 V 6 336 V 6 464 V 8 15 V 14 85 V 15 15 V 9 15 V 14 85 V 15 15 V 18 5 1 V 5 151 V 5 05 V 19 5 1 V 5 151 V 5 05 V Table 6 19 J8 Front Panel Voltages Pin Nominal Voltage Minimum Voltage Maximum Voltage 1 15 V 14 25 V 15 75 V 2 5 V 5 05 V 5 15 V 4 5 V ...

Page 237: ...Troubleshooting Maintenance 6Ć90 J7 Pin 1 J8 Pin 1 J6 Pin 1 W1 Pin 1 W2 Pin 1 Figure 6 46 A01 Backplane Module ...

Page 238: ...sing the Console Port Set Up procedure connect the console port cable to the oscilloscope and to your personal computer Does the oscilloscope power up normally Replace J101 the Attenuator Backplane cable or the A05 Attenuator module Does the oscilloscope power up normally Power off the oscilloscope Reconnect the cable to connector J101 on the A05 Attenuator board Remove the connector to J7 on the ...

Page 239: ...erminal as you turn on the power to the oscilloscope Note the first failure or where the tests stop Is the last displayed message Acq Number of Digitizers Perform the I2C Isolation troubleshootingprocedure Are the first characters of the name of the first failed diagnostic dsp Until changing a module fixes the problem replace in order the A09 DSP the A03 CPU the A02 Display and the A01 Backplane m...

Page 240: ...Options ...

Page 241: ... Option 13 RS 232 Centronics Hardcopy Interface With this option Tektronix ships the oscilloscope equipped with a RS 232 and a Centronics interface that can be used to obtain hardcopies of the oscillo scope screen Option 2F Advanced DSP Math With this option the oscilloscope can compute and display three advanced math waveforms integral of a waveform differential of a waveform and an FFT Fast Four...

Page 242: ... Level Service Manual When Option B1 is ordered Tektronix ships a module level service manual with the oscilloscope Option 1M 60 000 Point Record Length This option provides a maximum record length of 60 000 points per acquisi tion 60 000 channel Warranty Plus Service Options The following options add to the services available with the standard warranty The standard warranty appears on the back si...

Page 243: ...ix ships two additional probes identical to the two standard accessory P6138 probes normally shipped with the instrument This provides one probe for each front panel input Option 23 Active Probes With this option Tektronix ships two active high speed voltage probes the P6205 10X FET Option 25 P6562 AS Probes With this option Tektronix ships four P6562A SMD probes Option 29 TD100 Data Manager With ...

Page 244: ...board adapter they can also be ordered separately Table 7 3 Probe Accessories Accessory Part Number Retractable Hook Tip 013 0107 06 Body Shell tip cover 204 1049 00 Probe Tip to Circuit Board Adapter qty two standard optionally available in package of 25 as 131 5031 00 No customer ord erable part num ber for double unit 6 Inch Slip On Ground Lead 196 3113 02 Low Inductance Ground Lead 195 4240 00...

Page 245: ...curity Cable 012 1388 00 Front Cover 200 3232 00 Pouch 016 1159 00 VGA Cable 73893013 NEC part num ber Accessory Probes The following optional accessory probes are recommended for use with your digitizing oscilloscope H P6101A 1X 15 MHz Passive probe H P6156 10X 3 5 GHz Passive low capacitance low impedance Zo probe Option 25 provides 100X H P6009 Passive high voltage probe 100X 1500 VDC Peak AC H...

Page 246: ...AM 503S A6302 and P6021 Peak pulse 1 kA 0 5 Hz to 20 MHz with AM 503S A6302 H P6701A Opto Electronic Converter 500 to 950 nm DC to 850 MHz 1 V mW H P6703A Opto Electronic Converter 1100 to 1700 nm DC to 1 GHz 1 V mW H P6711 Opto Electronic Converter 500 to 950 nm DC to 250 MHz 5 V mW H P6713 Opto Electronic Converter 1100 to 1700 nm DC to 300 MHz 5 V mW H TVC 501 Time to voltage converter Time del...

Page 247: ...0 SMT KlipChipTM 20 Adapters SMG50 Low Inductance Spring Tips Two each of five different springs and insulator 016 1077 00 Probe Tip to Chassis Adapter 131 4210 00 NOTE The next four items below can only be used with the Compact to Miniature Probe Tip Adapter Dual Lead Adapter 015 0325 00 BNC to Probe Tip Adapter 013 0084 01 G R to Probe Tip Adapter 50 W 017 0088 00 Bayonet Ground Assembly 013 008...

Page 248: ...Option and Accessories Options 7Ć8 Warranty Information Check for the full warranty statements for this product the probes and the products listed above on the back of each product manual s title page ...

Page 249: ...Electrical Parts List ...

Page 250: ...ical Parts List The modules that make up this instrument are often a combination of me chanical and electrical subparts Therefore all replaceable modules are listed in Section 10 Mechanical Parts List Refer to that section for part numbers when using this manual ...

Page 251: ...Replaceable Electrical Parts List Electrical Parts List 8Ć2 ...

Page 252: ...Diagrams ...

Page 253: ... 1984 in terms of positive logic Logic symbols depict the logic function performed and can differ from the manufacturer s data The tilde preceding a signal name indicates that the signal performs its intended function when in the low state Other standards used in the preparation of diagrams by Tektronix Inc are H Tektronix Standard 062 2476 Symbols and Practices for Schematic Drafting H ANSI Y14 1...

Page 254: ...0 J40 P5 P4 P3 P2 J4 A08 JUMPER J7 J9 P1 P2 34 PINS 34 PINS 20 PINS J6 A25 20 LOW VOLTAGE PWR SUPPLY J2 22 PINS REM W3 W5 J1 5 PINS 3 PINS 50 1 3 2 A7W5 A7W2 A04 ACQUISITION J5 J8 50 PINS OPTION 14 PINS 2 PINS INTRG BACK PANEL NO BLOCK DIAGRAMS THESE REPLACEABLE CABLES FOR THESE BOARDS ARE LISTED IN SECTION 10 FAN LINE FILTER B15 AUXILIARY POWER A07 J3 P3 W4 2 PINS 2 10 PINS J7 J4 2 PINS AUX TRIG ...

Page 255: ...INATIONS 98 PINS DTE PORT RS 232 P1 P3 98 PINS 9 PINS J60 2 PIN J1 9 7V 2A A0 9 DSP W2 P1 P2 J5 J1 98 PINS 20 TERMINATIONS 98 PINS 98 PINS 3 0V J1 50 PINS 2 PINS 50 TO BT12 J1 J7 8 PINS J2 8 50 9 PINS VIDEO VGA COMPATIBLE J4 P1 P2 98 PINS 98 PINS A10 SERPAR 25 PINS J50 25 CENTRONICS COMPATIBLE DISPLAY J7 22 PINS 22 A02 A26 MONITOR J901 10 PINS 2 A01 BACKPLANE J6 10 PINS 10 FUSED 50 PINS Figure 9 1...

Page 256: ... FUSE POWER SWITCH LOW VOLTAGE POWER SUPPLY A09 DISP BATTERY 50 22 10 2 2 1 2 FL52 1 PROBE ADJ GND 10 MENU SWITCHES A17 BEZEL BUTTON 14 PROBE CODING INTERFACE A15 5 A06 FRONT PANEL 10 34 34 20 2 98 50 50 FRONT PAN EL SWITCHES FRONT PAN EL POTS FRONT PAN EL LEDS PROBE COMPENSATION 2 3 1 1 TDS 420 TDS 460 ONLY TDS 420 TDS 460 ONLY Figure 9 2 TDS 400 Block Diagram ...

Page 257: ...ATTERY A03 CPU DIAG PORT RS 232 PORT 10 10 25 9 8 VID EO VGA A26 MONITOR MONITOR ASSEMBLY DISPLAY VIDEO A02 2 98 50 1 GPIB IEEE 488 PORT PROCESSOR SYSTEM 98 OPTION 13 A10 SERPAR 7V 2A FUSED RS 232 DTE PORT 2 9 25 CENTRON ICS COMPATIBLE Figure 9 2 TDS 400 Block Diagram Cont ...

Page 258: ...Diagrams 9Ć6 ...

Page 259: ...Mechanical Parts List ...

Page 260: ...ication number if applicable If a part you order has been replaced with a different or improved part your local Tektronix service center or representative will contact you concerning any change in the part number Change information if any is located at the rear of this manual Module Replacement The TDS 400 is serviced by module replacement so there are three options you should consider H Module Ex...

Page 261: ...the relationship between items The follow ing example is of the indentation system used in the Description column 1 2 3 4 5 Name Description Assembly and or Component Attaching parts for Assembly and or Component END ATTACHING PARTS Detail Part of Assembly and or Component Attaching parts for Detail Part END ATTACHING PARTS Parts of Detail Part Attaching parts for Parts of Detail Part END ATTACHIN...

Page 262: ...OC TK2469 UNITREK CORPORATION 3000 LEWIS CLARK WAY SUITE 2 VANCOUVER WA 98601 TK2478 GRIMES COMPANY 115 S AROVISTA CIRCLE BREA CA 92631 0DWW6 MICRO POWER ELECTRONICS 7973 SW CIRRUS DRIVE BLDG 22 BEAVERTON OR 97005 0JR05 TRIQUEST CORP 3000 LEWIS AND CLARK HWY VANCOUVER WA 98661 2999 0KB01 STAUFFER SUPPLY 810 SE SHERMAN PORTLAND OR 97214 00779 AMP INC 2800 FULLING MILL PO BOX 3608 HARRISBURG PA 1710...

Page 263: ...Mechanical Parts List 10Ć4 ...

Page 264: ...MERICAN CAP FUSEHOLDER 5 X 20MM FUSES EUROPEAN S3629 S3629 FEK 031 1666 FEK 031 1663 12 159 0014 00 159 0255 00 1 1 FUSE CARTRIDGE 3AG 5A 250V 0 8SEC AMERICAN FUSE CARTRIDGE FAST BLOW 4A 125V EUROPEAN 61857 61857 SS2 5A EQ4A 13 211 0691 00 4 SCREW MACHINE 6 32 X 0 625 PNH STL 0KB01 ORDER BY DESC 14 200 3991 00 200 3991 01 200 3991 00 200 3991 01 200 3991 01 B010100 B012249 B010100 B011340 B012248 ...

Page 265: ...DIUM DETENTED TK1163 ORDER BY DESC 24 366 2111 00 3 KNOB SMALL FLUTED TK1163 ORDER BY DESC 25 200 3232 01 1 COVER FRONT ASB OPTIONAL ACCESSORY TK1908 ORDER BY DESC 26 354 0709 00 354 0736 00 1 1 RING TRIM LEXAN 940 TDS420 460 ONLY TRIM DECORATIVE FRONT TDS410 ONLY 80009 80009 354070900 354073600 27 366 2164 00 14 PUSH BUTTON SMOKE TAN 80009 366216400 28 334 8214 00 334 8215 00 334 8733 00 1 1 1 MA...

Page 266: ...TDS 410 TDS 420 TDS 460 Service Manual 10Ć7 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Figure 10 1 External and Front Panel Modules ...

Page 267: ...ONLY DISPLAY MODULE 7 INCH MONOCHROME P31 TDS460 ONLY DISPLAY MODULE 7 INCH MONOCHROME P31 TDS460 ONLY DISPLAY MODULE 7 INCH MONOCHROME P31 TDS410 ONLY 80009 80009 80009 80009 80009 80009 80009 119391700 640007900 640007901 119391700 640007900 640007901 640007901 5 426 2426 00 1 FRAME FAN MTG POLYCARBONATE 80009 426242600 6 671 1682 00 1 CIRCUIT BD ASSY AUXILIARY POWER 80009 671168200 7 119 1770 0...

Page 268: ...1398 B012174 B020099 B010240 B010320 B010418 B010599 B010619 B010676 B010838 B020099 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 CIRCUIT BD ASSY ACQUISITION TDS420 ONLY CIRCUIT BD ASSY ACQUISITION TDS420 ONLY CIRCUIT BD ASSY ACQUISITION TDS420 ONLY CIRCUIT BD ASSY ACQUISITION TDS420 ONLY CIRCUIT BD ASSY ACQUISITION TDS420 ONLY CIRCUIT BD ASSY ACQUISITION TDS420 ONLY CIRCUIT BD ASSY ACQUISITION TDS420 ...

Page 269: ...TDS460 ONLY CIRCUIT BD ASSY ATTENUATOR TDS410 ONLY 80009 80009 80009 80009 80009 80009 80009 80009 80009 80009 671168002 671168003 671168004 671168005 671168601 671168602 671168603 671168604 671168605 671308600 24 337 3713 01 1 SHIELD ELEC ATTENUATOR TK1935 337 3713 01 25 671 1676 00 671 1676 01 671 1676 02 671 1676 00 671 1676 01 671 1676 02 671 1676 02 B010100 B010352 B010979 B010100 B010472 B01...

Page 270: ...TDS 410 TDS 420 TDS 460 Service Manual 10Ć11 A4 A8 A5 A3 A7 A1 A2 A9 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 3 3 3 3 14 3 3 14 14 Figure 10 2 Internal Modules ...

Page 271: ...00 1 CABLE ASSY PWR 1460 PVC 18 AWG TK2469 174 2631 00 8 174 2281 00 174 2281 01 174 2281 00 174 2281 01 174 2281 01 B010100 B011770 B010100 B010969 B011769 B010968 1 1 1 1 1 CA ASSY SP ELEC 50 28 AWG 2 3 L FLAT CABLE TDS420 ONLY CA ASSY SP ELEC 50 28 AWG 2 3 L FLAT CABLE TDS420 ONLY CA ASSY SP ELEC 50 28 AWG 2 3 L FLAT CABLE TDS460 ONLY CA ASSY SP ELEC 50 28 AWG 2 3 L FLAT CABLE TDS460 ONLY CA AS...

Page 272: ...TDS 410 TDS 420 TDS 460 Service Manual 10Ć13 1 2 3 4 5 6 7 8 9 10 11 6 3 Figure 10 3 Cables and Routing ...

Page 273: ...80009 070872101 1 CABLE ASSY PWR 3 18 AWG 92 L SVT TAN STANDARD SEE FIGURE 10 1 9 TK2432 ORDER BY DESC 161 0104 05 1 CABLE ASSY PWR 3 18 AWG 240V 98 0 L OPTION A3 AUSTRALIAN S3109 SAA 3 OD3CCFC3X 161 0104 06 1 CABLE ASSY PWR 3 X 0 75MM SQ 220V 98 0 L OPTION A1 EUROPEAN S3109 VIIGSOPO HO5VVF 161 0104 07 1 CABLE ASSY PWR 3 1 0MM SQ 240 VOLT 2 5 M OPTION A2 UNITED KINGDOM S3109 ORDER BY DESC 161 0104...

Page 274: ...34416 ORDER BY DESC 016 1158 00 1 CASE CARRYING SOFT PADDED OPTIONS 80009 016115800 016 1166 00 1 RACK MOUNT KIT RACK MOUNT TDS400 80009 016116600 063 1130 05 1 SOFTWARE PKG DISK FIRMWARE V1 3 UTIL V1 8 TDS420 460 ONLY 80009 063113005 063 1352 00 1 SOFTWARE PKG DISK MAINTENANCE TOOLS 80009 063135200 063 2037 00 1 SOFTWARE PKG OPERATING S W TDS410 ONLY 80009 063203700 063 2039 00 1 SOFTWARE PKG FIE...

Page 275: ...Mechanical Parts List 10Ć16 ...

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