Tektronix TDS2001C Technical Reference Download

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Summary of Contents for TDS2001C

Page 1: ...xx TDS2000C Series Digital Storage Oscilloscopes ZZZ Service Manual P077044600 077 0446 00 ...

Page 2: ......

Page 3: ...es to firmware version 1 00 and above Warning The servicing instructions are for use by qualified personnel only To avoid personal injury do not perform any servicing unless you are qualified to do so Refer to all safety summaries prior to performing service www tektronix com 077 0446 00 ...

Page 4: ...n this publication supersedes that in all previously published material Specifications and price change privileges reserved TEKTRONIX and TEK are registered trademarks of Tektronix Inc OpenChoice is a registered trademark of Tektronix Inc Contacting Tektronix Tektronix Inc 14150 SW Karl Braun Drive P O Box 500 Beaverton OR 97077 USA For product information sales service and technical support In No...

Page 5: ... 12 Mechanical Characteristics 1 13 Environmental Performance 1 13 Data Logging System Characteristics 1 14 Limit Testing System Characteristics 1 14 Where to Find Operating Information Where to Find Operating Information 2 1 Theory of Operation Theory of Operation 3 1 System Level Block Diagrams 3 2 Main Board 3 4 Acquisition System 3 4 Processing and Display System 3 5 Input Signal Interface 3 5...

Page 6: ...ical Position Accuracy 4 10 Adjustment Procedures Adjustment Procedures 5 1 Required Equipment 5 1 Adjustment Procedure 5 2 Enable the Service Menu 5 2 Adjustment Procedure 5 4 Maintenance 6 1 Preventing ESD 6 1 Inspection and Cleaning 6 1 General Care 6 2 Interior Cleaning 6 2 Exterior Cleaning 6 2 Exterior Inspection 6 3 Interior Inspection 6 3 Cleaning Procedure Interior 6 4 Removal and Install...

Page 7: ...oting the Power Supply 6 29 Troubleshooting the Display 6 30 Troubleshooting the Backlight 6 32 Troubleshooting the Front Panel 6 34 Troubleshooting the Main Board 6 37 Repackaging Instructions 6 40 Diagrams 7 1 Replaceable Parts Replaceable Parts 8 1 Parts Ordering Information 8 1 Using the Replaceable Parts List 8 2 Parts Lists and Exploded Views 8 3 Appendix A Example of a Vertical Position Acc...

Page 8: ...ting the Display cable 6 15 Figure 6 5 Oscilloscope troubleshooting tree page 1 of 4 6 24 Figure 6 6 Oscilloscope troubleshooting tree page 2 of 4 6 25 Figure 6 7 Oscilloscope troubleshooting tree page 3 of 4 6 26 Figure 6 8 Oscilloscope troubleshooting tree page 4 of 4 6 27 Figure 6 9 Measuring the backlight voltage 6 33 Figure 7 1 TDS2000C series block diagram 7 2 Figure 8 1 Exploded diagram 2 c...

Page 9: ...klist 6 3 Table 6 2 Internal inspection checklist 6 4 Table 6 3 Tools and equipment 6 23 Table 6 4 Probe Comp output 6 28 Table 6 5 Troubleshooting the power supply 6 29 Table 6 6 Troubleshooting the display 6 30 Table 6 7 Troubleshooting the front panel service 6 34 Table 6 8 Troubleshooting the front panel Service Diag 6 34 Table 6 9 Troubleshooting the front panel Mfg test 6 34 Table 6 10 Expec...

Page 10: ...shock the grounding conductor must be connected to earth ground Before making connections to the input or output terminals of the product ensure that the product is properly grounded Observe all terminal ratings To avoid fire or shock hazard observe all ratings and markings on the product Consult the product manual for further ratings information before making connections to the product Connect th...

Page 11: ...itions or practices that could result in injury or loss of life CAUTION Caution statements identify conditions or practices that could result in damage to this product or other property Symbols and Terms on the Product These terms may appear on the product DANGER indicates an injury hazard immediately accessible as you read the marking WARNING indicates an injury hazard not immediately accessible ...

Page 12: ...ble of rendering first aid and resuscitation is present Disconnect Power To avoid electric shock switch off the instrument power then disconnect the power cord from the mains power Use Care When Servicing With Power On Dangerous voltages or currents may exist in this product Disconnect power remove battery if applicable and disconnect test leads before removing protective panels soldering or repla...

Page 13: ...sible controls Replaceable Parts This manual refers to any field replaceable assembly or mechanical part specifically by its name or generically as a replaceable part In general a replaceable part is any circuit board or assembly such as the hard disk drive or a mechanical part such as the I O port connectors that is listed in the replaceable parts list Safety Symbols and terms related to safety a...

Page 14: ...Preface x TDS2000C Series Oscilloscope Service Manual ...

Page 15: ...Specifications ...

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Page 17: ...cale factors and the specifications Table 1 1 Signal acquisition system characteristics Characteristic Description Number of Input Channels Two for the TDS2001C TDS2002C TDS2012C and TDS2022C or four for the TDS2004C TDS2014C and TDS2024C nominally identical channels sampled simultaneously Input Coupling DC AC or GND Input Impedance DC Coupled 1 MΩ 2 in parallel with 20 pF 3 pF At the front panel ...

Page 18: ... the probe used must be added to the accuracy specifications of instrument No automatic probe interface is provided so you must verify that the settings match the probe characteristics The probe check function allows setting of the proper attenuation for voltage probes Acquisition Modes Sample Peak Detect Average Envelope mode not provided Front panel settings are retained when the instrument powe...

Page 19: ...NC 25 Ω effective source TDS2022C TDS2024C to 200 MHz for 5 mV div through 5 V div settings with bandwidth limit at full with temperature between 0 C and 35 C DC to 160 MHz for 5 mV div through 5 V div settings with bandwidth limit at full for temperatures between 0 C and 50 C 5 mV div settings are limited to 20 MHz bandwidth TDS2012C TDS2014C DC to 100 MHz for 5 mV div through 5 V div settings wi...

Page 20: ...y calculated from the following formula Rise time in ns 350 Bandwidth in MHz This is the capability of the instrument to capture single event pulses using the Peak Detect Acquisition Mode The minimum single pulse widths for guaranteed 50 or greater amplitude capture are as follows Model Sec Div Setting Minimum Pulse Width TDS2002C TDS2004C TDS2012C TDS2014C TDS2022C TDS2024C 50 sec div to 5 μS div...

Page 21: ... channel due to stray coupling Model Crosstalk TDS2022C TDS2024C 100 1 with a 100 MHz sine wave and with equal V div settings on each channel TDS2012C TDS2014C 100 1 with a 50 MHz sine wave and with equal V div settings on each channel TDS2002C TDS2004C 100 1 with a 30 MHz sine wave and with equal V div settings on each channel Crosstalk Channel Isolation TDS2001C 100 1 with a 20 MHz sine wave and...

Page 22: ...l Position knob The resolution of the Horizontal Position time is 1 25 of a horizontal division Horizontal Window Display The Window Zone enables a user to select a part of the display to be magnified The user controls the location with the Horizontal Position knob and the width with the Sec Div knob Vertical cursors show the selected zone To magnify the zone the user selects the window from the m...

Page 23: ... which begins at 100 ms div when Trigger Mode is AUTO By adjusting Trigger Mode to NORMAL the Scan Mode operation is turned off and Holdoff can be adjusted at larger seconds Div settings External Trigger Input Impedance 1 M 2 in parallel with 20 pF 3 pF 300 VRMS Installation Category II derate at 20 dB decade above 100 kHz to 13 V peak AC at 3 MHz and above External Trigger Maximum Input Voltage B...

Page 24: ... when the trigger Source is DC coupled Trigger Source Sensitivity Measurement style A typical Sensitivity Measurement style B All products 1 5 div from DC to 10 MHz 2 mV div 4 div from DC to 10 MHz 2 mV Div 1 div from DC to 10 MHz 2 mV div 2 5 div from DC to 10 MHz 2 mV Div TDS2001C 3 div between 10 MHz and 50 MHz 1 5 div between 10 MHz and 50 MHz TDS2002C TDS2004C 3 div between 10 MHz and 70 MHz ...

Page 25: ...for an input channel source 4 mV for Ext source and 20 mV for Ext 5 source This is the amount of deviation allowed between the level on the waveform at which triggering occurs and the level selected for DC coupled triggering signals 0 2 div 5 mV for signals within 4 divisions from the center screen having rise and fall times of 20 ns Ext 6 of setting 40 mV for signals less than 800 mV Trigger Leve...

Page 26: ...nd 16 5 ns Not Equal Guardband All pulses even from the most stable sources have some amount of jitter To avoid disqualifying pulses that are intended to qualify but are not absolutely correct values we provide an arbitrary guardband Any measured pulse width outside the guardband will qualify If you are looking for pulse width differences that are smaller than the guardband width offsetting the ce...

Page 27: ...asurement window that qualify as triggerable events for example all narrow pulses in a PWM pulse train if set to mode and the limit is set to a relatively small number Edge Trigger mode Counts all pulses of sufficient magnitude Display Specifications Table 1 4 Display specifications Characteristic Description Display Type 11 5 cm width 8 64 cm height 14 3 cm diagonal 5 7 QVGA active TFT color liqu...

Page 28: ...eriodically in memory The settings are not lost when the instrument is turned off or if there is a power failure Stored Waveforms and Multiple Front Panel Settings Two Channel 1 Channel 2 or Math waveforms can be stored in nonvolatile waveform memory A or B One both or neither of A or B waveform memories can be displayed For the TDS20X4C four waveforms A B C D or Math can be stored Ten user setups...

Page 29: ...altitude Temperature Nonoperating 40 C to 71 C 40 F to 159 8 F with 5 C minute maximum gradient Operating 5 to 85 relative humidity RH at up to 40 C 5 to 45 RH above 40 C up to 50 C noncondensing and as limited by a Maximum Wet Bulb Temperature of 37 C derates relative humidity to 45 RH at 50 C Humidity Nonoperating 5 to 85 relative humidity RH at up to 40 C 5 to 45 RH above 40 C up to 50 C noncon...

Page 30: ...teristics NOTE This software feature directs the oscilloscope to monitor an active input signal against a template and to output pass or fail results by judging whether the input signal is within the bounds of the template Table 1 11 Limit testing system characteristics Characteristic Description Source The signal source which you want to do the limit testing Channel 1 Channel 2 Channel 3 Channel ...

Page 31: ...fter a violation is detected Save Image The oscilloscope will automatically save a screen image when a violation is detected Save Waveform The oscilloscope will automatically save a digital copy of the source waveform when a violation is detected Stop After Defines the conditions that will cause the oscilloscope to end limit testing Manual Lets you stop the test by toggling the Run stop choice Wav...

Page 32: ...Specifications 1 16 TDS2000C Series Oscilloscope Service Manual ...

Page 33: ...Where to Find Operating Information ...

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Page 35: ...d operating your TDS2000C Series Digital Storage Oscilloscope refer to the TDS2000C Series Digital Storage Oscilloscope User Manual The user manuals are available in eleven languages and are on the Web at www tektronix com TDS2000C Series Oscilloscope Service Manual 2 1 ...

Page 36: ...Where to Find Operating Information 2 2 TDS2000C Series Oscilloscope Service Manual ...

Page 37: ...Theory of Operation ...

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Page 39: ...ation of the TDS2000C series oscilloscopes to the module level by describing the basic operation of each functional circuit block NOTE The descriptions for the 2 channel and 4 channel models are slightly different TDS2000C Series Oscilloscope Service Manual 3 1 ...

Page 40: ...s Two high level block diagrams are provided one for 2 channel models and one for 4 channel models See Figure 3 1 on page 3 2 See Figure 3 2 on page 3 3 Figure 3 1 Module level block diagram 2 channel 3 2 TDS2000C Series Oscilloscope Service Manual ...

Page 41: ...Theory of Operation Figure 3 2 Module level block diagram 4 channel TDS2000C Series Oscilloscope Service Manual 3 3 ...

Page 42: ... variable gain amplifiers as well as filters that provide 20 MHz bandwidth limiting The task of the amplifier ASIC is to convert from a 1 MΩ single ended environment in the front end to a much lower impedance differential and thus less noise sensitive environment for the acquisition process The amplifier ASIC assures that the input signal is amplified to a level that will allow the fullest possibl...

Page 43: ...nel 3 data from channel 2 is prohibited Channel 1 and Channel 2 data may be combined in all of the supported ways Input Signal Interface BNC connectors are mounted on the Main board for all signal inputs The signal inputs are compatible with the supplied TPP0101 and TPP0201 probes Probe Compensation The Probe Comp and ground terminals are provided for probe adjustment External Trigger The Ext Trig...

Page 44: ...ches and position encoders on the Front Panel board of 2 channel oscilloscopes Several LEDs are used to indicate when the Multipurpose knob is active when Autorange is active and when a Save action is in progress For more information on the LEDs refer to the User Manual for your oscilloscope An IC on the Front Panel board provides buffering and multiplexing of switch signals to the Main board Two ...

Page 45: ...Performance Verification ...

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Page 47: ...0Ω BNC Cable BNC male to BNC male 1 m 36 in long Tektronix part number 012 0482 XX 50Ω BNC Cable BNC male to BNC male 25 cm 10 in long Tektronix part number 012 0208 XX 50Ω Feedthrough Termination BNC male and female connectors Tektronix part number 011 0049 XX Dual Banana to BNC Adapter Banana plugs to BNC female Tektronix part number 103 0090 XX BNC T Adapter BNC male to dual BNC female connecto...

Page 48: ...Channel 2 Bandwidth 2 12 V 2 Channel 3 Bandwidth 1 2 12 V 2 Channel 4 Bandwidth 1 2 12 V 2 Sample Rate and Delay Time Accuracy 2 divs 2 divs Channel 1 Edge Trigger Sensitivity Stable trigger 3 Channel 2 Edge Trigger Sensitivity Stable trigger 3 Channel 3 Edge Trigger Sensitivity 1 Stable trigger 3 Channel 4 Edge Trigger Sensitivity 1 Stable trigger 3 External Edge Trigger Sensitivity Stable trigge...

Page 49: ...test equipment or hookups are required Verify that no error messages are displayed before continuing with this procedure Self Calibration The self calibration routine lets you quickly optimize the oscilloscope signal path for maximum measurement accuracy You can run the routine at any time but you should always run the routine if the ambient temperature changes by 5 C or more 1 Disconnect all prob...

Page 50: ...he polarity of the DC voltage source and record the mean measurement as Vneg c Calculate Vdiff Vpos Vneg and compare Vdiff to the accuracy limits in the following table Vertical Scale volts div setting DC voltage source output levels Accuracy limits for Vdiff 5 mV div 17 5 mV 17 5 mV 33 6 mV to 36 4 mV 200 mV div 700 mV 700 mV 1 358 V to 1 442 V 2 V div 7 00 V 7 00 V 13 58 V to 14 42 V 5 Set DC vo...

Page 51: ...scilloscope Horizontal Scale seconds division to 10 ms div 5 Set the leveled sine wave generator frequency to 50 kHz 6 Set the leveled sine wave generator output level so the peak to peak measurement is between 2 98 V and 3 02 V 7 Set the leveled sine wave generator frequency to 50 MHz if you are checking a TDS2001C 70 MHz if you are checking a TDS2002C or TDS2004B 100 MHz if you are checking a TD...

Page 52: ...ator as shown in the following figure 3 Set the time mark generator period to 10 ms 4 Set the oscilloscope Vertical Scale volts division to 500 mV div 5 Set the oscilloscope Main Horizontal Scale seconds division to 1 ms div 6 Push Set To 50 7 Use the Vertical Position control to center the test signal on screen 8 Use the Horizontal Position control to set the position to 10 00 ms 9 Set the oscill...

Page 53: ...ticule center corresponds to a 25 ppm time base error 11 Disconnect the test setup Check Edge Trigger Sensitivity This test checks the edge trigger sensitivity for all input channels 1 Set up the oscilloscope using the following table Push menu button Select menu option Select setting Default Setup Channel 1 Probe 1X Trig Menu Mode Normal Acquire Sample Source Channel under test Measure Type Pk Pk...

Page 54: ... are checking a TDS2001C 70 MHz if you are checking a TDS2002C or TDS2004C 100 MHz if you are checking a TDS2012C TDS2014C TDS2022C or TDS2024C 9 Set the oscilloscope Horizontal Scale seconds division to 5 ns div 10 Set the leveled sine wave generator output level to approximately 750 mV p p so that the measured amplitude is approximately 750 mV The measured amplitude can fluctuate around 750 mV 1...

Page 55: ... Source CH1 Measure Type Pk Pk 2 Connect the oscilloscope to the leveled sine wave generator as shown in the following figure using channel 1 and Ext Trig 3 Set the oscilloscope Vertical Scale volts division to 100 mV div 4 Set the oscilloscope Horizontal Scale seconds division to 25 ns div 5 Set the leveled sine wave generator frequency to 10 MHz 6 Set the sine wave generator output level to appr...

Page 56: ... table Push menu button Select menu option Select setting Trig Menu Slope Falling 15 Push Set To 50 Adjust Trigger Level as necessary and then check that triggering is stable 16 Disconnect the test setup Check Vertical Position Accuracy The results of this test and the DC Gain Accuracy test together define the DC Measurement Accuracy of the oscilloscope The DC Measurement Accuracy specification en...

Page 57: ...xample in Appendix A You only need to enter the values for column A and the equations The values in columns B C D E F and G are examples of the measured or calculated values The PDF version of the TDS2000C service manual which you can download from the www tektronix com Web site includes an empty spreadsheet for your convenience To access and save the test spreadsheet see the instructions in Appen...

Page 58: ...peat steps 4 through 6 for the values of 1 76 V through 0 V 8 Swap the connections to the positive terminal of the power supply with those at the negative terminal as shown in the following figure 9 Repeat steps 4 through 6 for the values of 0 04 V through 1 8 V 10 Enter the Minimum Margin number cell I16 for the channel tested in the test record 11 Repeat steps 1 through 10 for all input channels...

Page 59: ...t no error values the blue line in the center go above the yellow line upper line or below the purple line lower line For calculations involved in this example refer to the data in the previous table see step 1 Figure 4 1 Example of a line graph for the Vertical Position Accuracy test TDS2000C Series Oscilloscope Service Manual 4 13 ...

Page 60: ...Performance Verification 4 14 TDS2000C Series Oscilloscope Service Manual ...

Page 61: ...Adjustment Procedures ...

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Page 63: ... following table or a suitable equivalent is required to complete these procedures See Table 5 1 Table 5 1 Required equipment Description Minimum requirements s Example DC Voltage Source 20 V to 20 V 0 1 accuracy Leveled Sinewave Generator 5 kHz and 200 MHz 0 6 amplitude accuracy Wavetek 9100 Universal Calibration System with Oscilloscope Calibration Module Option 250 Fluke 5500A Multi product Cal...

Page 64: ...that some of the steps take a significant amount of time up to 5 minutes to complete Equipment setups are shown in the following figure See Figure 5 1 on page 5 3 Signal requirements for each step are shown in the following table See Table 5 2 on page 5 5 Enable the Service Menu Before performing the adjustment procedure enable the Service menu as follows 1 Power on the oscilloscope 2 Push the fro...

Page 65: ...Adjustment Procedures Figure 5 1 Adjustment setups TDS2000C Series Oscilloscope Service Manual 5 3 ...

Page 66: ...s along with the Adjustment setup table for the remainder of the routine applying the proper signal for each step See Table 5 2 NOTE During some steps the oscilloscope may appear to be idle for several minutes while it is processing information internally You must wait for the screen prompt to continue If any step in the procedure fails the procedure terminates Failure will result if an incorrect ...

Page 67: ...e 1 0 03 V 14 14 DC Voltage 1 0 02 V 15 15 DC Voltage 1 0 015 V 16 16 DC Voltage 1 0 015 V 17 17 DC Voltage 1 0 02 V 18 18 DC Voltage 1 0 03 V 19 19 DC Voltage 1 0 04 V 20 20 DC Voltage 1 0 08 V 21 21 DC Voltage 1 0 16 V 22 22 DC Voltage 1 0 2 V 23 23 DC Voltage 1 0 32 V 24 24 DC Voltage 1 0 4 V 25 25 DC Voltage 1 0 8 V 26 26 DC Voltage 1 1 2 V 27 27 DC Voltage 1 1 6 V 28 28 DC Voltage 1 2 0 V 29 ...

Page 68: ...ave Generator 50 Ω BWL 50 mVp p 42 42 Sinewave Generator 50 Ω BWL 100 mVp p 43 43 Sinewave Generator 50 Ω BWL 250 mVp p 44 44 Sinewave Generator 50 Ω BWL 500 mVp p 45 40 Sinewave Generator 50 Ω BWL 1 Vp p 46 46 Sinewave Generator 50 Ω 5 kHz 2 5 Vp p 47 47 Sinewave Generator 50 Ω 1 MHz 2 5 Vp p 48 48 Sinewave Generator 50 Ω 50 kHz 2 5 Vp p 49 49 Sinewave Generator 50 Ω 20 MHz 2 5 Vp p 50 50 Sinewav...

Page 69: ...e Generator 50 Ω BWL 25 mVp p 60 60 Sinewave Generator 50 Ω BWL 50 mVp p 61 61 Sinewave Generator 50 Ω BWL 100 mVp p 62 62 Sinewave Generator 50 Ω BWL 250 mVp p 63 63 Sinewave Generator 50 Ω BWL 500 mVp p 64 64 Sinewave Generator 50 Ω BWL 1 Vp p 65 65 Sinewave Generator 50 Ω 5 kHz 2 5 Vp p 66 66 Sinewave Generator 50 Ω 1 MHz 2 5 Vp p 67 67 Sinewave Generator 50 Ω 50 kHz 2 5 Vp p 68 68 Sinewave Gen...

Page 70: ...inewave Generator 50 Ω BWL 50 mVp p 78 Sinewave Generator 50 Ω BWL 100 mVp p 79 Sinewave Generator 50 Ω BWL 250 mVp p 80 Sinewave Generator 50 Ω BWL 500 mVp p 81 Sinewave Generator 50 Ω BWL 1 Vp p 82 Sinewave Generator 50 Ω 5 kHz 2 5 Vp p 83 Sinewave Generator 50 Ω 1 MHz 2 5 Vp p 84 Sinewave Generator 50 Ω 50 kHz 2 5 Vp p 85 Sinewave Generator 50 Ω 20 MHz 2 5 Vp p 86 Sinewave Generator 50 Ω BWL 2 ...

Page 71: ...wave Generator 50 Ω BWL 25 mVp p 96 Sinewave Generator 50 Ω BWL 50 mVp p 97 Sinewave Generator 50 Ω BWL 100 mVp p 98 Sinewave Generator 50 Ω BWL 250 mVp p 99 Sinewave Generator 50 Ω BWL 500 mVp p 100 Sinewave Generator 50 Ω BWL 1 Vp p 101 Sinewave Generator 50 Ω 5 kHz 2 5 Vp p 102 Sinewave Generator 50 Ω 1 MHz 2 5 Vp p 103 Sinewave Generator 50 Ω 50 kHz 2 5 Vp p 104 Sinewave Generator 50 Ω 20 MHz ...

Page 72: ...Adjustment Procedures 5 10 TDS2000C Series Oscilloscope Service Manual ...

Page 73: ...ontains static sensitive modules Discharge the static voltage from your body by wearing a grounded antistatic wrist strap while handling these modules Service static sensitive modules only at static free workstations Do not allow anything capable of generating or holding a static charge on the workstation surface Handle circuit boards by the edges when possible Do not slide the modules over any su...

Page 74: ...connect it from line voltage before performing any procedure that follows Exterior Cleaning CAUTION Avoid the use of chemical cleaning agents which might damage the plastics used in this oscilloscope Use only deionized water when cleaning the menu buttons or front panel buttons Use a 75 isopropyl alcohol solution as a cleaner and rinse with deionized water Before using any other type of cleaner co...

Page 75: ...ion and deformed contacts Dirt in connectors Repair or replace defective modules Clear or wash out dirt Carrying handle and cabinet feet Correct operation Repair or replace defective module Accessories Missing items or parts of items bent pins broken or frayed cables and damaged connectors Repair or replace damaged or missing items frayed cables and defective modules Interior Inspection To access ...

Page 76: ...nectors Burned broken or frayed wiring Firmly seat connectors Repair or replace modules with defective wires or cables Chassis Dents deformations and damaged hardware Straighten repair or replace defective hardware Cleaning Procedure Interior To clean the oscilloscope interior perform the following steps 1 Blow off dust with dry low pressure deionized air approximately 9 psi 2 Remove any remaining...

Page 77: ...ay must be replaced as an assembly if significant moisture or debris become trapped inside Cotton tipped applicators and lint free rags moistened in isopropyl alcohol and or deionized water offer the best cleaning with the least opportunity for damage to the assembly The Front Panel module can be damaged by deposition of film or debris inside the knob encoders To avoid this be careful not to drip ...

Page 78: ...Replaceable Parts List for a list of all replaceable modules and their part numbers Refer to the Exploded View Diagrams for each procedure as indicated in the table Summary of Procedures Complete disassembly is best achieved by following the procedures in the order given in the following table Procedure Begins on page Rear Feet See page 6 8 Rear Feet Flip Feet See page 6 9 Flip Feet Front Panel Kn...

Page 79: ...Maintenance Figure 6 1 Locator for trim and cabinet removal 4 channel model shown Figure 6 2 Locator for internal modules 4 channel model shown TDS2000C Series Oscilloscope Service Manual 6 7 ...

Page 80: ... knife X ACTO knife or equivalent 3M Electrical Tape 92 with 1 mil polyimide Kapton backing temperature rated 180 C UL510 Flame Retarded Rear Feet You will need a flat blade screwdriver to remove the rear feet Refer to the exploded view diagram See page 8 10 Removal 1 Place the oscilloscope face down on a soft surface such as an anti static mat 2 Use a flat blade screwdriver to pry out the foot or...

Page 81: ... to snap into the slot on the other side Front Panel Knobs Refer to the exploded view diagram for the 2 channel models or the 4 channel models See page 8 4 See page 8 6 NOTE Wrap the plier jaws with tape such as electrical tape to avoid scratching the knob Removal Firmly grasp the knob with pliers if necessary and pull it away from the front panel Installation Align the keyed knob with the shaft a...

Page 82: ...r parts between the front and rear cases 2 Place the rear case onto the assembled oscilloscope and verify that All of the edges align with the front case The Li ION battery is vertical in the battery location The slots align near the USB connector and near the battery CAUTION Avoid cross threading the screws that attach the rear case to the front case An easy way to avoid this is to slip the screw...

Page 83: ...age 6 10 Rear Case 2 Slide the front feet out of the front case Installation Slide the feet into the slots provided in the front case NOTE If the front feet are not installed but are available they can be inserted by carefully pinching them and pushing them into their slots For example you may need to do this if the rear case has been removed and a foot has been rubbed off and unnoticed until the ...

Page 84: ... and place the power supply module into the internal assembly 2 Install the two longer screws with thread lock into the IEC connector mounting holes 3 Install the three shorter screws through the power supply and into the chassis 4 Connect the following wire and cables See Figure 6 3 The ground wire on the power supply module to the chassis ground lug You may need to use pliers to secure the wire ...

Page 85: ...entire internal assembly consisting of the chassis all of the boards and the display screen out of the front case NOTE The switch keypad will most likely remain inside the front case You do not need to remove it with the internal assembly Installation 1 Install the switch keypad mat in the front case if it was removed 2 Place the internal assembly in the front case 3 Install the five screws to att...

Page 86: ...play cable from J201 on the Main board by pulling straight up from the connector Remove the cable tie to release the cable See Figure 6 3 Figure 6 3 Display Adapter board connections 3 Disconnect the LCD data cable from the Display Adapter board 4 Disconnect the LCD backlight cable from the Display Adapter board at J204 5 Disconnect the Display Adapter board power cable from the Display Adapter bo...

Page 87: ... Position the Display Adapter board on the instrument chassis and align the board with the holes in the chassis 3 Use the four screws that were removed to attach the Display Adapter board to the chassis 4 Connect the Display cable to J201 on the Main board as shown in the figure For the 4 channel models make sure that the two ferrite EMI suppressors are attached as shown See Figure 6 4 Figure 6 4 ...

Page 88: ...ons and connect the cable to the Display Adapter board at J204 8 Twist the Display Adapter power cable four revolutions and connect the cable to the Display Adapter board at J202 9 Assemble the oscilloscope by performing the installation procedure for each module that was removed 6 16 TDS2000C Series Oscilloscope Service Manual ...

Page 89: ...ht up from the connector 7 Disconnect the front panel cable at J1 on the Front Panel module Installation 1 Connect the front panel cable to the Front Panel module at J1 through the appropriate slot on the chassis 2 Twist the cable to keep it from contacting the boards and chassis and attach it using the cable tie NOTE Wind up the front panel cable until it is tight loops are okay This keeps the ca...

Page 90: ...lling up on the cable The display cable at J201 The front panel cable at J202 3 Use the screwdriver to remove the three screws that attach the Main board module to the internal assembly 4 Use the socket to remove the nuts and washers from the BNC connectors 5 Pull the board out from the front slots of the internal assembly Installation 1 Work from the bottom of the internal assembly and place the ...

Page 91: ...e Main board The power supply cable at J101 The display cable at J201 The front panel cable at J202 5 Assemble the oscilloscope by performing the installation procedure for each module that was removed TDS2000C Series Oscilloscope Service Manual 6 19 ...

Page 92: ... LCD data cable from the Display module 5 Remove the power supply module See page 6 12 Power Supply Module 6 Remove the four screws attaching the display module to the chassis The screws were exposed when the power supply module was removed 7 Remove the display from the chassis Installation 1 Position the Display module on the chassis 2 Use the Torx T 8 screwdriver and install the four screws to a...

Page 93: ...l Assembly 3 Disconnect the front panel cable from J1 on the Front Panel module 4 Remove the five screws attaching the Front Panel module to the internal assembly 5 Pull the module away from the internal assembly Installation 1 Connect the front panel cable to J1 on the Front Panel module by pushing the cable straight down into the connector 2 Install the five screws to attach the Front Panel modu...

Page 94: ...trical contacts on the back of the keypad clean Skin oils and dust inhibit good electrical contact Installation 1 Place the front case face down on a soft surface such as an anti static mat 2 Align the switch keypad into the front case using the guide posts and the holes in the keypad CAUTION Keep the electrical contacts on the back of the switch keypad clean Skin oils and dust inhibit good electr...

Page 95: ... tools and equipment to troubleshoot the oscilloscope Table 6 3 Tools and equipment Tools and equipment Example Oscilloscope with 1X 10X and 100X probes Tektronix TDS2000C series oscilloscope with standard accessory 10X probe TPP0201 or TPP0101 and optional 100X probe P5100 or P5200 DMM 3 5 or greater digit DMM USB flash drive Tektronix part number 119 7276 00 128 MB USB type A to type B cable Tek...

Page 96: ...Maintenance Figure 6 5 Oscilloscope troubleshooting tree page 1 of 4 6 24 TDS2000C Series Oscilloscope Service Manual ...

Page 97: ...Maintenance Figure 6 6 Oscilloscope troubleshooting tree page 2 of 4 TDS2000C Series Oscilloscope Service Manual 6 25 ...

Page 98: ...Maintenance Figure 6 7 Oscilloscope troubleshooting tree page 3 of 4 6 26 TDS2000C Series Oscilloscope Service Manual ...

Page 99: ...Maintenance Figure 6 8 Oscilloscope troubleshooting tree page 4 of 4 TDS2000C Series Oscilloscope Service Manual 6 27 ...

Page 100: ... doing acquisition or one of those two modules is not performing correctly While many different possible frequencies exist all involve detected failures on the Main board due to Main board failure or power supply failure Table 6 4 Probe Comp output Signal at Probe Comp Possible problem 1 kHz signal no display Refer to Troubleshooting the Display See page 6 30 Troubleshooting the Display Non 1 kHz ...

Page 101: ...4 V 5 0 V to 3 5 V 0 8 A 9 3 5 8 10 2 5 V Line trigger 2 V to 6 V open circuit 1 diode drop when attached to the Main board 1 mA 11 3 5 8 10 Line trigger 1 With 3 W minimum load still functions with no load 3 If all of the voltages are present the Main board is probably defective Replace it 4 If all or some of the voltages are missing turn off the oscilloscope and disconnect the cable at connector...

Page 102: ...laceable Parts for the location and orientation of the connector on the Main board Table 6 6 Troubleshooting the display Signal at J201 Description Color Pin 1 marked with No fixed pattern Depends on display data Pin 2 No fixed pattern Depends on display data Pin 3 No fixed pattern Depends on display data Pin 4 No fixed pattern Depends on display data Pin 5 No fixed pattern Depends on display data...

Page 103: ...on the Main board Carefully pull the cable straight up from the connector to avoid damage 7 Turn on the oscilloscope 8 Probe the pins of J201 checking for the same signals as in step 3 9 If any of the signals are missing the Main board module is probably defective Replace it TDS2000C Series Oscilloscope Service Manual 6 31 ...

Page 104: ...er reading is not correct the power supply module is probably defective Replace it WARNING To avoid electrical shock do not touch the backlight connectors J204 on the Display Adapter board See Figure 6 4 5 Check that the voltage output between J204 1 and J204 6 on the Display Adapter board generates around 15 5 V If the reading is not correct the Display Adapter module is probably defective Replac...

Page 105: ...t J204 of the Display Adapter board for each wire is around 25 mA If the reading is not correct the Display Adapter module is probably defective Replace it Figure 6 9 Measuring the backlight voltage TDS2000C Series Oscilloscope Service Manual 6 33 ...

Page 106: ...he following options appear Table 6 8 Troubleshooting the front panel Service Diag Menu Comments Mfg Tests Displays a front panel simulation used to check that all front panel controls are operational Loop Diag Opens a menu that enables you to rerun a subset of the power on self tests Peek Poke For engineering use only Clear Error Log Removes all Error Log entries from memory and sets the power cy...

Page 107: ...scope and the TPP0201 probe to probe the front panel cable connector at J202 on the Main board 2 channel models or J1 4 channel models The following table describes the signals you should expect to see Table 6 10 Expected signals at J202 Signal at J202 Description 1 FPLED_P LED latch line 6 44 kHz High with 120 ns low pulses Location of pulse relative to FPCLR_12_P determines which lights are lit ...

Page 108: ... 50 ns pulses Determines beginning of a scan sequence for second half of front panel 1 Unused and open on 2 channel models 2 Unused and tied low on 2 channel models 11 If all of the signals are present the Front Panel board is probably defective Replace it 12 If some or all of the signals are missing continue with step 13 13 Turn off the oscilloscope and disconnect the front panel cable from the M...

Page 109: ... 6 7 3 5 8 10 3 3 V 2 5 V 4 V 5 0 V to 3 5 V 0 8 A 9 3 5 8 10 2 5 V Line trigger 2 V to 6 V open circuit 1 diode drop when attached to the Main board 1 mA 11 3 5 8 10 Line trigger 1 With 3 W minimum load still functions with no load 3 If all of the voltages are present the Main board is probably defective Replace it Running Diagnostics The oscilloscope runs an extensive self diagnostic routine at ...

Page 110: ...e accessed anytime by pushing the UTILITY button and selecting Error Log The following table lists the error codes and probable causes See Table 6 12 Table 6 12 List of error codes Error code Description Probable cause 0 DI Diagnostics internal error Contact Tektronix 1 DI ADG522 diagnostics failed Main board or power supply failure 2 DI PROM diagnostics failed Main board or power supply failure 3...

Page 111: ...he Service Menu 2 Push the UTILITY button and push the Service option button to display the Service menu 3 Push the Service Diag option button to display the Diagnostics menu 4 Push the Clear Error Log option button to clear the error log of past failures This also sets the Power Cycle count to zero TDS2000C Series Oscilloscope Service Manual 6 39 ...

Page 112: ...g information The owner address Name and phone number of a contact person Type and serial number of the oscilloscope Reason for returning 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 Storage The o...

Page 113: ... the electrical operation of the TDS2000C series oscilloscopes using the major circuit blocks or modules The oscilloscope module interconnections are shown in the figure See Figure 7 1 TDS2000C Series Oscilloscope Service Manual 7 1 ...

Page 114: ...Diagrams The shaded area in the figure represents modules and circuits used only in 4 channel oscilloscopes Figure 7 1 TDS2000C series block diagram 7 2 TDS2000C Series Oscilloscope Service Manual ...

Page 115: ...Replaceable Parts ...

Page 116: ......

Page 117: ...ix field office or representative will contact you concerning any change in part number Change information if any is located at the rear of this manual Part Number Revision Level Tektronix part numbers contain two digits that show the revision level of the part For some parts in this manual you will find the letters XX in place of the revision level number When you order parts Tektronix will provi...

Page 118: ...r Items in this section are referenced by figure and index numbers to the exploded view illustrations that follow 2 Tektronix Part Number Use this part number when ordering replacement parts from Tektronix 3 and 4 Serial Number Column three indicates the serial number at which the part was first effective Column four indicates the serial number at which the part was discontinued No entries indicat...

Page 119: ...7 00 1 MARKER IDENTIFICATION 2CH LANGUAGE RUSSIAN 5 260 2904 70 1 SWITCH KEYPAD ELASTOMERIC FRONT PANEL 2CH COLOR BONDED 6 211 1272 00 9 SCREW MACHINE 6 32 X 0 250 PNH STL ZNPL T 15 TORX DR 7 870 0188 02 1 CIRCUIT BD ASSY FRONT PANEL BOARD 2CH 389 3835 00 WIRED 8 441 2454 02 1 CHASSIS ASSY 2 CHANNEL SAFETY CONTROLLED 9 878 0391 70 1 CIRCUIT BD ASSY DISPLAY ADAPTER BOARD 389429600 BONDED 870 0560 0...

Page 120: ...Replaceable Parts Figure 8 1 Exploded diagram 2 channel models 8 4 TDS2000C Series Oscilloscope Service Manual ...

Page 121: ... 260 2905 70 1 SWITCH KEYPAD ELASTOMERIC FRONT PANEL 4 CH COLOR BONDED 6 211 1272 00 9 SCREW MACHINE 6 32 X 0 250 PNH STL ZNPL T 15 TORX DR 7 870 0190 02 1 CIRCUIT BD ASSY FRONT PANEL BOARD 4CH 389 3836 00 WIRED 8 441 2455 00 1 CHASSIS ASSY 4 CHANNEL 9 878 0391 70 1 CIRCUIT BD ASSY DISPLAY ADAPTER BOARD 389429600 BONDED 870 0564 01 1 CIRCUIT BD ASSY MAIN 4 CH 70 MHZ TESTED CONFIGURED COLOR 389 413...

Page 122: ...Replaceable Parts Figure 8 2 Exploded diagram 4 channel models 8 6 TDS2000C Series Oscilloscope Service Manual ...

Page 123: ...MALE 1 X 12 0 059 1 5 MM CTR DUAL ENDED FRONT PANEL 5 346 1673 00 1 CLAMP CABLE NYLON 6 6 COLOR NATURAL 6 174 5819 00 1 CA ASSY FPC FFC LCD DATA CABLE 7 211 1275 00 2 SCREW MACHINE W HEAVY PATCH THREADLOCKING MATERIAL 6 32 X 0 312 L PNH STL ZNPL T15 8 119 7609 70 1 POWER SUPPLY CUSTOM AC DC 85 275 VAC 45 440HZ IN 6 V 1 0 A 3 3 V 1 8 A 4 V 0 8 A 35 V 0 015 A OUT LINE TRIGGER SIGNAL SAFETY CONTROLLE...

Page 124: ...Replaceable Parts Figure 8 3 Power supply module cables and wires 2 ch model shown with 4 ch model in circle 8 8 TDS2000C Series Oscilloscope Service Manual ...

Page 125: ...M 1 850 0154 00 1 REAR CASE ASSY COVER WITH FEET AND HANDLE 2 348 1703 00 1 FOOT FRONT FLIPMPC ABS SILVER GRAY 3 348 1704 00 1 FOOT REAR SANTOPRENE BLACK 4 211 1272 00 5 SCREW MACHINE 6 32 X 0 250 PNH STL ZNPL T 15 TORX DR 5 200 5105 00 2 COVER ESD PROTECTION 6 366 0856 00 1 PUSH BUTTON POWER 7 211 1273 00 5 SCREW PT K35 1 57 PAN HEAD T 15 TDS2000C Series Oscilloscope Service Manual 8 9 ...

Page 126: ...Replaceable Parts Figure 8 4 Exploded diagram back case and trim 8 10 TDS2000C Series Oscilloscope Service Manual ...

Page 127: ...PDF file in Adobe Reader version 7 or later 6 Click the paper clip icon lower left of the screen to display the Attachments panel If the paper clip icon is not shown click View Navigation Panels Attachments 7 Double click the VPA Test Table xls file 8 Click OK in the Launch Attachment dialog box The test spreadsheet opens in your spreadsheet application and shows the Blank Test Record spreadsheet ...

Page 128: ...52 0 025 Equation for cell G7 MIN D7 E7 F7 D7 15 1 48 1 48 1 49 0 010 0 0248 0 0248 0 015 16 1 44 1 44 1 45 0 010 0 0244 0 0244 0 014 Minimum margin 0 007 MIN G7 G97 17 1 40 1 4 1 41 0 010 0 024 0 024 0 014 18 1 36 1 36 1 37 0 010 0 0236 0 0236 0 014 19 1 32 1 32 1 33 0 010 0 0232 0 0232 0 013 20 1 28 1 28 1 29 0 010 0 0228 0 0228 0 013 21 1 24 1 24 1 25 0 010 0 0224 0 0224 0 012 22 1 20 1 2 1 21 ...

Page 129: ...16 0 163 0 003 0 0116 0 0116 0 009 49 0 12 0 12 0 123 0 003 0 0112 0 0112 0 008 50 0 08 0 08 0 083 0 003 0 0108 0 0108 0 008 51 0 04 0 04 0 043 0 003 0 0104 0 0104 0 007 52 0 00 0 0 002 0 002 0 01 0 01 0 008 53 0 04 0 04 0 039 0 001 0 0104 0 0104 0 009 54 0 08 0 079 0 079 0 000 0 01079 0 01079 0 011 55 0 12 0 12 0 118 0 002 0 0112 0 0112 0 009 56 0 16 0 159 0 159 0 000 0 01159 0 01159 0 012 57 0 2...

Page 130: ...2 1 20 1 2 1 2 0 000 0 022 0 022 0 022 83 1 24 1 24 1 24 0 000 0 0224 0 0224 0 022 84 1 28 1 28 1 28 0 000 0 0228 0 0228 0 023 85 1 32 1 32 1 32 0 000 0 0232 0 0232 0 023 86 1 36 1 36 1 36 0 000 0 0236 0 0236 0 024 87 1 40 1 4 1 4 0 000 0 024 0 024 0 024 88 1 44 1 44 1 44 0 000 0 0244 0 0244 0 024 89 1 48 1 48 1 48 0 000 0 0248 0 0248 0 025 90 1 52 1 52 1 52 0 000 0 0252 0 0252 0 025 91 1 56 1 56 ...

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