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TDS1000B and TDS2000B Series Digital Storage Oscilloscopes

1. oe omor sew oom 0 omor 0062 cow TDS1000B and TDS2000B Series Oscilloscope Service Manual A 3 Appendix A Example of a Vertical Position Accuracy Test Spreadsheet AR T ge pk es 050 one oma oo 05 as ofo om oor cow ef sos oma vas s om ojom oos ome von m 072 an ors amr sore omz von m an or me ors are oom 7 om us IEA ove oe vow m oms ome omw vos n om MN IE nor 75 ae oms oms none oma cow m oe oo oos ome vos m emepsm ne aoe oo 100 0000 sene oma oom toe 0000 eme oma wan e ooo sez oma ana sens E oom sp 12 aef sue me w 00 a 0000 seme oma oom u m 0000 ems oma cow e 102 100 0000 sem oma oom w 105 108 108 0000 sens ame aa rp ta era ooo me ox sex 100 ra ooo ox 10 om orafo 008 aef me e woo sese omse 008 ZU 158
2. TDS1000B and TDS2000B Series Oscilloscope Service Manual 6 3 Maintenance Interior Inspection A To access the inside of the oscilloscope for inspection and cleaning refer to the Removal Procedures in this section Use Table 6 2 as a guide to inspect the internal portions of the oscilloscope for damage and wear Repair any defects immediately If any circuit board is repaired or replaced check Table 6 2 to see if it is necessary to adjust the oscilloscope CAUTION To prevent damage from electrical arcing ensure that circuit boards and components are dry before applying power to the oscilloscope Table 6 2 Internal inspection check list Item Circuit boards Inspect for Loose broken or corroded solder connections Burned circuit boards Burned broken or cracked circuit run plating Repair action Remove and replace damaged circuit board Resistors Burned cracked broken blis Remove and replace damaged tered condition circuit board Solder connections Cold solder or rosin joints Resolder joint and clean with isopropyl alcohol Capacitors Damaged or leaking cases Remove and replace damaged Corroded solder on leads or terminals circuit board Wiring and cables Loose plugs or connectors Burned broken or frayed wiring Firmly seat connectors Repair or replace modules with defective wires or cables Chassis Dents deformations and dam aged hardware
3. 1 Remove the front panel knobs power button and rear case using the procedures on page 6 9 2 Remove the five screws attaching the internal assembly to the front case 3 Lift the 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 It does not need to be removed with the internal assembly Installation To install the internal assembly refer to Figure 8 4 and follow these steps 1 Use the installation procedure for each module removed to reassemble the oscilloscope 2 Install the switch mat in the front case 3 Place the internal assembly into the front case 4 Install the five screws to attach the internal assembly to the front case You will need a torque limiting Torx T 15 screwdriver and pliers for this procedure Removal To remove the display cable refer to Figure 8 3 and follow these steps 1 Remove the power button and rear case using the procedures on page 6 9 2 Remove the power supply using the procedure on page 6 11 3 Disconnect the display cable at J201 on the main board by pulling straight up from the connector 4 Remove the cable tie and remove the tape to release the display cable TDS1000B and TDS2000B Series Oscilloscope Service Manual Maintenance 5 Remove the display 6 Disconnect the display cable on the display module 7 Thread the c
4. Required Tools Rear Feet Flip Feet Use the following tools to remove and replace all modules in the oscilloscope Torque limiting screwdriver long shank 12 in Ib 1 3 N m range with Torx T 15 tip if you use a magnetic screwdriver with interchangeable bits the T 15 bit must be a long bit at least 5 cm 2 in overall length Torque limiting screwdriver with Torx T 8 bit m 5 8 inch deep socket with wide center hole S K Hand Tool Corp S K 40820 or equivalent m Torque wrench to 40 in Ib 4 5 N m Screwdriver with 1 4 inch flat blade m Pliers all purpose and needle nose m Sharp knife X ACTO knife or equivalent m Electrical Tape 92 with 1 mil polyimide Kapton backing temperature rated 180 C UL510 Flame Retarded You will need a flat blade screwdriver to remove the rear feet Removal To remove the rear feet refer to Figure 8 4 and follow these steps 1 Place the oscilloscope face down on soft surface such as an anti static mat 2 Use a flat blade screwdriver to pry out the foot or twist the foot as you are removing it so that it disengages from the guides Use care not to mar the surface of the rear case Installation To install the rear feet refer to Figure 8 4 and follow these steps 1 Place the oscilloscope face down on a soft surface such as an anti static mat 2 Align the slots of the rear foot with the guides in the rear case and press the foot in You will need a pair of
5. Does the data match what is No visible on the PC Check that the TekVISA software OpenChoice PC Communications is installed on the PC Does the data match what is visible on the oscilloscope Connect the oscilloscope to the PC Yes Good oscilloscope Transfer data from the oscilloscope to the PC The oscilloscope displays a clock symbol when the flash drive is active and a hint line when a save or recall operation is complete Figure 6 7 Oscilloscope troubleshooting tree 4 of 4 6 24 TDS1000B and TDS2000B Series Oscilloscope Service Manual Maintenance PROBE COMP Output When the oscilloscope is on and operating properly the PROBE COMP output should generate a square wave approximately 5 V in amplitude ata 1 kHz frequency Use the oscilloscope and set the Attenuation switch to 10X on the P2220 probe to probe this output As shown in the table below there are two cases of defects Either the 1 kHz signal is on and the power supply and main board are both active and functional ly capable of doing acquisition or one of those two modules is not performing correctly While a large number of different possible frequencies exist all involve detected failures on the main board due to main board failure or power supply failure Signal at PROBE COMP 1 kHz signal no display Possible problem Refer to Troubleshooting the Display page 6 26 Non 1 kHz signal Refer to Troublesh
6. 150 15 0000 seme ome vas p aof ae 5 we ome oo oom SI 150 re 0000 ses oss vos a ef cue too wo ses ox an s aa oe p we sem omre on cue sens ome vow spese ME ooo ep ee 4 TDS1000B and TDS2000B Series Oscilloscope Service Manual Appendix A Example of a Vertical Position Accuracy Test Spreadsheet These test values are outside of the range in the specification TDS1000B and TDS2000B Series Oscilloscope Service Manual A 5 Appendix A Example of a Vertical Position Accuracy Test Spreadsheet A 6 TDS1000B and TDS2000B Series Oscilloscope Service Manual Index Index A acquisition module troubleshooting 6 32 acquisition system description 3 4 adjustment procedure 5 5 description 5 2 adjustment procedures setups 5 4 backlight troubleshooting 6 28 bandwidth test 4 5 C cabinet removal 6 7 calibration Do Self Cal 4 3 cleaning and inspection exterior 6 2 6 3 interior 6 2 6 4 connections troubleshooting 6 33 connectivity 1x D DC gain accuracy test 4 4 delay time accuracy test 4 6 disassembly complete 6 6 display module description 3 6 troubleshooting 6 26 display system description 3 5 documentation related ix E edge trigger sensitivity test
7. 50 BNC Cable BNC male to BNC male Tektronix part number 012 0482 XX 1 36 in long 50 Q BNC Cable seven BNC male to BNC male Tektronix part number 012 0208 XX 25 cm 10 in long 50 Q Feedthrough BNC male and female Tektronix part number 011 0049 XX Termination connectors TDS1000B and TDS2000B Series Oscilloscope Service Manual 5 1 Adjustment Procedures Adjustment Procedure Enable the Service Menu 5 2 Table 5 1 Required equipment Cont Description Minimum requirements Examples Dual Banana to BNC Banana plugs to BNC female Tektronix part number 103 0090 XX Adapter BNC T three One male and two female Tektronix part number 103 0030 XX BNC connectors The adjustment procedure consists of 70 steps for the two channel oscilloscope and 106 steps for the four channel model Each step requires an external voltage source for new calibration constants Before performing the adjustment procedure warm up the oscilloscope for at least ten minutes in an ambient temperature between 20 C and 30 C Adjust ments performed prior to warm up or outside this temperature range may result in poor performance If all steps in the procedure are completed successfully a Pass message is displayed and the new calibration constants take affect If any step fails the procedure is aborted and the current calibration is not affected You can choose to abort the procedure at any step without affect
8. Self Test Self Calibration Before beginning these procedures two conditions must first be met m The oscilloscope must have been operating continuously for twenty minutes within the operating temperature range specified You must perform the Self Calibration operation described below If the ambient temperature changes by more than 5 C you must perform the Self Calibration operation again The time required to complete the entire procedure is approximately one hour WARNING Some procedures use hazardous voltages To prevent electrical shock always set voltage source outputs to 0 V before making or changing any interconnections This internal procedure is automatically performed every time the oscilloscope is powered on No test equipment or hookups are required Verify that no error messages are displayed before continuing with this procedure 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 any probes or cables from the channel input connectors CH 1 CH 2 CH 3 CH 4 2 Push the UTILITY button and select the Do Self Cal option to start the routine The routine takes approximately one minute to complete TDS1000B and TDS2000B Series Oscilloscope Service Manual 4 3 Performance Verification 3 Veri
9. power supply module to access the screws at the other end of the post CAUTION The display shield is attached to the display module Removing the shield will destroy the attaching gasket Installation To install the display module refer to Figure 8 1 for 2 channel models or Figure 8 2 for 4 channel models and follow these steps 1 Reconnect the display cable at J201 on the main board by pushing the cable straight down into the connector Route the display cable through the opening in the chassis For more information see the display cable procedure on page 6 12 For color displays use the Torx T 8 screwdriver and install the four screws to attach the display module to the chassis Torque the nuts to 3 in Ibs 0 33 N m using the torque wrench 2 864 26 in Ibs For 2 channel models the location and type of screws shown in Figure 8 1 will vary between the color and monochrome displays For monochrome displays install the four screws to attach the display module to the internal assembly Install the power supply module using the procedure on page 6 11 Route the backlight cable through the opening in the internal assembly Reconnect the backlight cable to the power supply module Connect to the black socket for a monochrome display and to the white socket for a color display Reconnect the display cable using the installation procedure on page 6 13 Use the installation procedure for each module removed t
10. 00 1 MARKER IDENTIFICATION 4CH LANGUAGE SPANISH 335 1494 00 1 MARKER IDENTIFICATION 4CH LANGUAGE JAPANESE 335 1495 00 1 MARKER IDENTIFICATION 4CH LANGUAGE PORTUGUESE 335 1496 00 1 MARKER IDENTIFICATION 4CH LANGUAGE SIMPLIFIED CHINESE 335 1497 00 1 MARKER IDENTIFICATION 4CH LANGUAGE TRADITIONAL CHINESE 335 1498 00 1 MARKER IDENTIFICATION 4CH LANGUAGE KOREAN 335 1499 00 1 MARKER IDENTIFICATION 4CH LANGUAGE RUSSIAN 5 260 2822 00 1 SWITCH KEYPAD ELASTOMERIC FRONT PANEL 4CH COLOR 6 211 1198 00 5 SCREW MACHINE 6 32 X 0 250 PNH STL ZNPL T 15 TORX DR 7 870 0190 01 1 CIRCUIT BD ASSY FRONT PANEL BOARD 4CH 389 3836 00 WIRED 8 441 2455 00 1 CHASSIS ASSEMBLY 4 CHANNEL 9 870 0011 00 1 CIRCUIT BD ASSY MAIN 4 CH 60MHZ TESTED amp CONFIGURED COLOR 389 3844 00 WIRED TDS2004B 870 0014 00 1 CIRCUIT BD ASSY MAIN 4 CH 100MHZ TESTED amp CONFIGURED COLOR 389 3844 00 WIRED TDS2014B 870 6179 01 1 CIRCUIT BD ASSY MAIN 4 CH 200MHZ TESTED amp CONFIGURED COLOR 389 3844 00 WIRED TDS2024B 10 210 1544 00 1 WASHER SPRING 0 610 OD X 0 490 ID X 0 007 THK WAVE SHAPE STAINLESS STEEL 11 220 0265 00 1 NUT PLAIN HEX 0 5 28 X 0 625 HEX BRS CD PL 12 211 1216 00 4 SCREW PT K 30 3MM PAN HEAD T 8 13 650 4889 70 1 FINAL ASSEMBLY DISPLAY COLOR 14 348 1525 00 1 FOOT FRONT SANTOPRENE BLACK 64 DEROMETER TEXTURED 8 6 TDS1000B and TDS2000B Series Oscilloscope Service Manual Replaceable Parts Figure 8 2 Exploded diagram 4 ch
11. 1 1 Oscilloscope specifications Cont Pulse Width trigger Pulse Width Range Pulse Width Resolution Equal Guardband Not Equal Guardband Trigger frequency cou Readout Resolution Accuracy typical Frequency Range Signal Source Measurements Cursors Automatic Measure Selectable from 33 ns to 10 s 16 5 ns or 1 part per thousand whichever is larger t gt 330 ns 5 guardband lt 5 1 16 5 ns t lt 330 ns guardband 16 5 ns t gt 330 ns 5 guardband lt 5 1 16 5 ns 165 ns lt t 330 ns guardband 16 5 ns 33 ns t lt 165 ns guardband 16 5 ns nter 6 digits 51 parts per million including all frequency reference errors and 1 count errors AC coupled 10 Hz minimum to rated bandwidth Pulse Width or Edge Trigger modes all available trigger sources The Frequency Counter measures trigger source at all times in Pulse Width or Edge modes including when the oscilloscope acquisition is halted due to changes in the run status or acquisition of a single shot event has completed Pulse Width Trigger mode The oscilloscope counts pulses of significant magnitude inside the 250 ms measurement window that qualify as triggerable events such as narrow pulses in a PWM pulse train if set to lt mode and the width is set to a relatively small time Edge Trigger mode The oscilloscope counts all edges of sufficient magnitude and correct polarity Video Trigger mode The Frequency Counter does
12. 2 channel models 8 5 Figure 8 2 Exploded diagram 4 channel models 8 7 Figure 8 3 Exploded diagram power supply module cables and Wires E Ee 8 9 Figure 8 4 Exploded diagram back case and trim 8 11 TDS1000B and TDS2000B Series Oscilloscope Service Manual iii Table of Contents List of Tables Table 1 1 Oscilloscope specifications 1 1 Table 1 2 Oscilloscope general specifications 1 8 Table 5 1 Required equipment 5 1 Table 5 2 Adjustment steps 5 6 Table 6 1 External inspection check list 6 3 Table 6 2 Internal inspection checklist 6 4 Table 6 3 List of procedures 6 7 Table 6 4 List of error codes 6 34 Table 8 1 Replaceable parts list 2 channel models 8 4 Table 8 2 Replaceable parts list 4 channel models 8 6 Table 8 3 Replaceable parts list power supply module cables And Wires un un sn RT arate 8 8 Table 8 4 Replaceable parts list back case and trim 8 10 Table 8 5 Standard accessories 8 12 Table 8 6 Optional accessories 8 12 iv TDS1000B and TDS2000B Series Oscilloscope Service Manual AS AE General Safety Summary Review the following safety p
13. 4 8 electrostatic discharge 6 1 precautions 6 1 6 2 equipment required adjustment procedures 5 1 performance verfication 4 1 error codes 6 34 error log 6 34 external edge trigger sensitivity test 4 9 external trigger description 3 5 F front panel description 2 channel models 3 6 4 channel models 3 7 front panel module troubleshooting 6 30 input signal interface description 3 5 inspection exterior 6 3 interior 6 4 inspection and cleaning exterior 6 2 interior 6 2 installation procedures display cable 6 13 display module 6 17 flip feet 6 9 front case 6 19 front feet 6 10 front panel cable 6 15 front panel module 6 18 internal assembly 6 12 keypad 6 19 main board module 6 16 power supply module 6 11 rear case 6 10 rear feet 6 8 internal modules locator 6 7 main board troubleshooting 6 32 main board functions 3 4 main board power description 3 5 manual conventions ix manuals related ix P packing 6 36 performance verification 4 1 power supply module description 3 6 TDS1000B and TDS2000B Series Oscilloscope Service Manual Index 1 Index troubleshooting 6 25 preventive maintenance 6 2 Probe Comp output troubleshooting 6 25 probe compensation description 3 5 procedures inspection and cleaning 6 2 6 5 interior cleaning 6 4 processing system description 3 5 R removal procedures display cable 6 12 display module 6 16 flip feet 6 8 front c
14. 5 1 V from DC to 100 MHz 1 V from DC to 100 MHz 1 75 V from 100 MHz to 200 MHz 1 div from DC to 10 MHz 1 div from DC to 10 MHz 1 5 div from 10 MHz to Full 1 5 div from 10 MHz to 100 MHz gt 5 mV di Zu 2 div from 100 MHz to Full CH1 CH2 CH3 CH4 CH1 CH2 2 5 div from DC to 10 MHz 4 div from 10 MHz to 20 MHz Sensitivity TDS1001B TDS1002B TDS1012B TDS2002B TDS2004B TDS2012B TDS2014B EXT 300 mV from DC to 100 MHz 300 mV from DC to 100 MHz 500 mV from 100 MHz to 200 MHz EXT 5 1 5 V from DC to 100 MHz 1 5 V from DC to 100 MHz 3 V from 100 MHz to 200 MHz 1 5 div from DC to 10 MHz 3 div from 10 MHz to Full TDS2022B TDS2024B CH1 CH2 CH3 CH4 5 mV div CH1 CH2 4 div from DC to 10 MHz 7 5 div from 10 MHz to 20 MHz Sensitivity Same as DC at 50 Hz and above Reduces the DC coupled trigger sensitivity by 2 times for gt 10 mV div to 5 V div Same as the DC coupled limit from DC to 7 kHz attenuates signals above 80 kHz Same as the DC coupled limits for frequencies above 300 kHz attenuates signals below 300 kHz TDS1000B and TDS2000B Series Oscilloscope Service Manual 1 5 Specifications Table 1 1 Oscilloscope specifications Cont Trigger Trigger Level Range typical Trigger Level Accura cy typical SET LEVEL TO 50 typical Default Settings Video Trigger Sensitivity Video Trig ger Type typical Signal Formats and Field Rates Video Trigge
15. J202 two channel models or J1 four channel models 13 Turn on the oscilloscope and check connector J202 two channel models or J1 four channel models for the same signals as in step 9 14 If some or all of the signals are missing the main board is probably defective Replace it Troubleshooting the Main To troubleshoot the main board acquisition module follow these steps Board 1 Remove the rear case using the procedure Rear Case on page 6 9 6 32 TDS1000B and TDS2000B Series Oscilloscope Service Manual Maintenance Running Diagnostics Troubleshooting Input Connections 2 Use the test oscilloscope to measure the voltages from the power supply module at J101 on the main board module The table below lists the voltages you should expect to see Maximum 101 J101 current power return Derived Supply Voltage range draw pins pins supplies 35V 30 Vpc to 40 floating 15 mA 1 2 28 V LCD Pin 2 connected to 3 3 V on the main board 6 V 5 5 V to 6 5 V 0 7A 4 3 5 8 5V 10 3 3 V 3 0 V to 3 6 V Requires 15A 6 7 3 5 8 33V 2 5 V minimum load to maintain 10 regulation 4V 5 0 V to 3 5 V 0 8 A 9 3 5 8 25V 10 Line trigger 2 V to 6 V open circuit 1mA 11 3 5 8 Line trigger 10 1 diode drop when at tached to the main board With 3 W minimum load still functions with no load 3 Ifall of the voltages are present the main board is probably defecti
16. 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 dust with a lint free cloth dampened in isopropyl alcohol 75 solution and then wipe with a lint free cloth dampened with warm deionized water A cotton tipped applicator is useful for cleaning in narrow spaces and on circuit boards TDS1000B and TDS2000B Series Oscilloscope Service Manual Maintenance STOP If after performing steps 1 and 2 a module is clean upon inspection skip steps 3 4 and 5 Proceed with step 6 3 Ifsteps 1 and 2 do not remove all the dust or dirt all modules in the oscilloscope except the Display Module and Front Panel Module may be spray washed using a solution of 75 isopropyl alcohol m During cleaning of the Acquisition board main board use care to assure that no residue is left in the attenuators Debris or residue can cause a number of problems with signal fidelity that cannot be corrected by calibration When handling the board avoid handling the attenuators since skin oils may cause problems m Extensive cleaning of the Display Module is difficult because water must not be trapped between the display shield and the display The polarizers integrated into the display degrade with long term exposure to water The display shield and display
17. gt 100 1 at 30 MHz gt 100 1 at 50 MHz gt 100 1 at 100 MHz Measured on one channel with test signal applied between signal and common of the other channel and with the same VOLTS DIV and coupling settings on each channel Refer to the Overvoltage Category description in the TDS1000B and TDS2000b User manual available on the Tektronix Web site at www tektronix com manuals T Bandwidth reduced to 6 MHz with a 1X probe 1 2 TDS1000B and TDS2000B Series Oscilloscope Service Manual Specifications Table 1 1 Oscilloscope specifications Cont Vertical Digitizers VOLTS DIV Range Position Range typical Vertical Position Accuracy Analog Bandwidth in Sample and Average modes at BNC or with P2220 probe set to 10X DC Coupled Analog Bandwidth in Peak Detect mode 50 s div to 5 us div typical Selectable Analog Band width Limit typical Lower Frequency Limit AC Coupled Rise Time at BNC typical Peak Detect Response 8 bit resolution except when set to 2 mV div each channel sampled simultaneously 2 mV div to 5 V div at input BNC 2 mV div to 200 mV div 2 V gt 200 mV div to 5 V div 50 V Measurement Type Volts Div Setting Position Accuracy 2 mV div to 200 mV div 196 X selected value 0 1 div 5 mV within the range 1 8 V 4 gt 200 mV div to 5 V div 196 X selected value 0 1 div 125 mV within the range 45 V TDS1002B TDS2002B TDS1012B TDS2012B TD
18. humidity for long periods of time The front and rear cases help keep dust out of the oscilloscope and must be in place during normal operation m To avoid damage to the oscilloscope or probes do not expose them to any sprays liquids or solvents Use a dry low velocity stream of air to clean the interior of the chassis Use a soft bristle non static producing brush for cleaning around components If you must use a liquid for minor interior cleaning use a 75 isopropyl alcohol solution and rinse with deionized water WARNING To avoid injury power down the instrument and disconnect it from line voltage before performing any procedure that follows Clean the exterior surfaces of the chassis with a dry lint free cloth or a soft bristle brush If any dirt remains use a cloth or swab dipped in a 75 isopropyl alcohol solution Use a swab to clean narrow spaces around controls and connectors Do not use abrasive compounds on any part of the chassis that may damage the chassis Clean the On Standby switch using a dampened cleaning towel Do not spray or wet the switch directly TDS1000B and TDS2000B Series Oscilloscope Service Manual Maintenance A 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 wate
19. 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 m The Front Panel module can be damaged by deposition of film or debris inside the knob encoders To avoid this care must be taken to not drip liquid or blow debris into the encoders 4 Spray wash dirty parts with the 75 isopropyl alcohol solution and wait 60 seconds for the majority of the alcohol to evaporate 5 Use hot 49 C to 60 C 120 F to 140 F deionized water to thoroughly rinse the parts 6 Dry all parts with low pressure deionized air 7 Dry all components and assemblies in an oven or drying compartment using low temperature 52 C to 66 C 125 F to 150 F circulating air Lubrication Periodic lubrication is not required for the oscilloscope TDS1000B and TDS2000B Series Oscilloscope Service Manual 6 5 Maintenance Removal and Installation Procedures List of Modules A Summary of Procedures 6 6 Refer to Figures 6 1 and 6 2 for the location of modules that you are removing or installing If you are disassembling the instrument for cleaning refer to the Inspection and Cleaning procedure on page 6 2 for instructions The Replaceable Parts List provides a list of all replaceable modules Any replaceable component assembly
20. needle nose pliers to remove the flip feet Removal To remove the flip feet refer to Figure 8 4 and follow these steps 1 Place the oscilloscope face down on soft surface such as an anti static mat 2 Grip the flip foot with the pliers as close to the notches as possible and squeeze gently on the foot 3 Twist slightly to swing one hinge free of the slot TDS1000B and TDS2000B Series Oscilloscope Service Manual Maintenance Installation To install the flip feet refer to Figure 8 4 and follow these steps 1 Place the oscilloscope face down on a soft surface such as an anti static mat 2 Hold the flip foot with the smooth side facing down 3 Gently squeeze the foot so that the hinge on one side fits into the slot and twist slightly to snap into the slot on the other side Front Panel Knobs Remove each front panel knob by firmly grasping the knob with pliers if necessary and pulling it away from the front panel NOTE Wrap the plier jaws with tape such as electrical to avoid marring the knob surface Install front panel knobs by aligning the keyed knob with the shaft and pressing the knob onto the shaft Power Button Remove the power button by firmly grasping the button with pliers and pull it straight out of the cabinet NOTE Wrap the plier jaws with tape such as electrical to avoid marring the button surface Install the button by pressing it onto the power button shaft until it snaps into
21. not operate Amplitude difference between cursors AV AA AVA Time difference between cursors At Reciprocal of At in Hertz 1 At Frequency Period Mean Pk Pk Cycle RMS Min Max Rise Time Fall Time Pos Width Neg Width ments TDS1000B and TDS2000B Series Oscilloscope Service Manual 1 7 Specifications Table 1 2 Oscilloscope general specifications Display Display Type 145 mm 5 7 in diagonal liquid crystal Display Resolution 320 horizontal by 240 vertical pixels Display Contrast Adjustable temperature compensated Backlight Intensity typical Monochrome display Color display 75 cd m 65 cd m Probe compensator output Output Voltage typical 5 V into 1 MQ load Frequency typical 1 kHz Power Source Source Voltage 100 240 VACRys 10 50 60 Hz 10 115 VACrms 10 400 Hz 10 Power Consumption Less than 30 W Fuse 1A T rating 250 V Environmental Pollution Degree Pollution degree 2T for indoor use only Do not operate in an environment where conductive pollutants may be present Temperature Operating 0 C to 50 C 32 F to 122 F Non Operating 40 C to 71 C 40 F to 159 8 F Cooling Method Convection Humidity 40 C or below 5 to 85 relative humidity 104 F or below 41 C to 50 C 5 to 45 relative humidity 106 F to 122 F gt 50 C to 71 C Wet bulb temperature of lt 37 C which is 12 at 71 C gt 122 F to 160 F Altitude 3 000 m appr
22. probes or cables from the channel input connectors Then press the UTILITY button and select Do Self Cal to confirm that you are ready to proceed Disable the Service menu option by pushing the UTILITY front panel button and the Service and Service Mode Off option buttons TDS1000B and TDS2000B Series Oscilloscope Service Manual 5 5 Adjustment Procedures Table 5 2 Adjustment steps Step number Step number Two channel Four channel models models Signal Signal source setting Input Refer to the DC voltage setup 1 diagram 1 1 DC Voltage 1 0 0V CH1 through 2 2 DC Voltage 1 20 0 V CHx 3 3 DC Voltage 1 2 0V 4 4 DC Voltage 1 1 6V 5 5 DC Voltage 1 1 2V 6 6 DC Voltage 1 0 8 V 7 7 DC Voltage 1 0 4V 8 8 DC Voltage 1 0 32 V 9 9 DC Voltage 1 0 2V 10 10 DC Voltage 1 0 16 V 11 11 DC Voltage 1 0 08 V 12 12 DC Voltage 1 0 04 V 13 13 DC Voltage 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 Q 4 V 25 25 DC Voltage 1 0 8 V 26 26 DC Voltage 1 12V 27 27 DC Voltage 1 16V 28 28 DC Voltage 1 2 0V 29 29 DC Voltage 1 20 0 V 30 30 DC Voltage 1 0 0 V 5 6 TDS1000B and TDS2000B Series Osci
23. 0B Series Oscilloscope Service Manual 6 21 Maintenance From Figure 6 4 D Check cabling to Able to run main board front panel Replace cable tests front panel or main board Verify power supply voltages gt From Figure 6 4 Power supplies OK Disconnect ower suppl Run front panel p tests service menu Verify power Replace main supply Voltages board Check cabling to main board Replace cable or main board Replace power Power supply supplies OK Replace front panel board Replace main board Figure 6 5 Oscilloscope troubleshooting tree 2 of 4 6 22 TDS1000B and TDS2000B Series Oscilloscope Service Manual Maintenance To Figure 6 4 A lt From Figure 6 4 Ss Power cord attached Open case Backlight cable attached Using a high voltage 100X probe test voltages on backlight connectors Detach display Replace power Attach power cord Replace power supply Attach backlight cable Replace display Reinstall case supply Figure 6 6 Oscilloscope troubleshooting tree 3 of 4 TDS1000B and TDS2000B Series Oscilloscope Service Manual 6 23 Maintenance Install a compatible USB flash drive in E From Figure 6 4 the front panel port Does the No Replace the flash drive 4 Main board blink Examine the contents of the flash drive through the file controls
24. 1000B or TDS2000B series oscilloscope with standard accessory 1X 10X probe P2220 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 Tektronix part numbers PC with USB host post and with TekVISA OpenChoice PC Communications installed 174 4401 00 91 meters 3 feet 174 5194 00 1 83 meters 6 feet PC with USB communication port To isolate a problem to a specific troubleshooting procedure use the trouble shooting tree in Figures 6 4 6 5 6 6 and 6 7 Detailed procedures follow the tree TDS1000B and TDS2000B Series Oscilloscope Service Manual Maintenance Turn on power Does screen lighten A From Figure 6 6 To Figure 6 6 See boot up screen No Put scope or frequency counter on probe comp Yes gt To Figure 6 5 Replace main board b gt To Figure 6 5 Front panel N Yes problems Verify LCD connector and cable values Run probe check on each channel Good Replace display voltages or display cable Replace main board Probe Replace main check Ok board Connect external trigger to probe comp Trigger indicator ON Replace main Set trigger board source to EXT E gt To Figure 6 7 Press set 50 Figure 6 4 Oscilloscope troubleshooting tree 1 of 4 TDS1000B and TDS200
25. 2B TDS2024B TDS1012B TDS2002B TDS2012B TDS2014B 5 ns div to 50 s div in a 1 2 5 5 sequence 2 5 ns div to 50 s div in a 1 2 5 5 sequence 50 parts per million ppm over any 1 ms time interval Accuracy Full Band width Position Range Single shot Sample mode 1 sample interval 100 ppm x reading 0 6 ns 1 sample interval 100 ppm x reading 0 4 rs Sample interval s div 250 TDS1001B TDS1002B TDS2004B TDS1012B TDS2002B TDS2012B TDS2014 TDS2022B TDS2024B 4 div x s div to 20 ms 4 div x s div to 50 ms dv ld 0505 4 div x s div to 250 s TDS2022B TDS2024B 2 5 ns div 4 div x s div to 20 ms Specifications are with the Probe p Voltage Attenuation option set to 1X 1 4 TDS1000B and TDS2000B Series Oscilloscope Service Manual Specifications Table 1 1 Oscilloscope specifications Trigger Trigger Sensitiv ity Edge Trigger Type DC coupling with a stable display of a trigger event Trigger Sensitivity Edge Trigger Type DC Coupling Frequency Counter typical Trigger Sensitivity Edge Trigger Type not DC Coupling typical Bandwidth reduced to 6 MHz with a 1X probe Coupling DC Coupling DC Coupling AC NOISE REJ HF REJ LF REJ TDS2022B TDS2024B Sensitivity TDS1001B TDS1002B TDS1012B TDS2002B TDS2004B TDS2012B TDS2014B EXT 200 mV from DC to 100 MHz 200 mV from DC to 100 MHz 350 mV from 100 MHz to 200 MHz EXT
26. 3 and follow these steps 1 Remove the front panel knobs power button and rear case using the procedures on page 6 9 Remove the internal assembly using the procedure on page 6 12 Remove the five screws attaching the front panel board to the chassis Untwist the cable tie to release the front panel cable Disconnect the front panel cable at 202 the main board by pulling straight up from the connector 6 Disconnect the front panel cable at J1 on the front panel module TDS1000B and TDS2000B Series Oscilloscope Service Manual Maintenance Installation To install the front panel cable refer to Figure 8 3 and follow these steps 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 contact with the boards and chassis and secure using the right cable tie NOTE Wind up the front panel cable until it is tight loops are okay This keeps the cable bundle together 3 Connect the front panel cable at J202 on the main board by pushing the cable straight down into the connector 4 Install the five screws to attach the front panel module to the chassis Main Board Module You will need a torque limiting Torx T 15 long shank screwdriver a torque wrench and a 5 8 inch deep socket for this procedure Preventing ESD section on page 6 1 before removing or installing the main N CAUTION The main board modul
27. 870 6178 01 1 CIRCUIT BD ASSY MAIN 2 CH 200MHZ TESTED amp CONFIGURED COLOR 389 3843 00 WIRED TDS2022B 10 210 1544 00 1 WASHER SPRING 0 610 OD X 0 490 ID X 0 007 THK WAVE SHAPE STAINLESS STEEL 11 220 0265 00 1 NUT PLAIN HEX 0 5 28 X 0 625 HEX BRS CD PL 12 385 0079 00 4 SPACER POST 0 375 L W 6 32 THD THRU AL 0 25 HEX MONO 13 211 0747 00 8 SCREW MACHINE 6 32 X 0 188 PNH STL CDPL T 15 TORX DR MONO 14 650 4605 70 1 FRAME ASSEMBLY DISPLAY MONO NANYA EXPORT 15 211 1216 00 4 SCREW PT K 30 3MM PAN HEAD T 8 COLOR 16 650 4889 70 1 FINAL ASSEMBLY DISPLAY COLOR 17 348 1525 00 1 FOOT FRONT SANTOPRENE BLACK 64 DEROMETER TEXTURED 8 4 TDS1000B and TDS2000B Series Oscilloscope Service Manual Replaceable Parts Figure 8 1 Exploded diagram 2 channel models 8 5 TDS1000B and TDS2000B Series Oscilloscope Service Manual Replaceable Parts Table 8 2 Replaceable parts list 4 channel models Fig amp deis Tektronix part Serialno Serial no number number effective discontd Qty amp description 8 2 4 CHANNEL MODELS 1 650 4976 00 1 FRONT CASE ASSY COVER W FEET TDS2004B TDS2014B TDS2024B COLOR 2 366 0863 00 1 ASSEMBLY KNOB 685 DIAMETER 3 366 0862 00 1 ASSEMBLY KNOB 470 DIAMETER 4 335 1490 00 1 MARKER IDENTIFICATION 4CH LANGUAGE FRENCH 335 1491 00 1 MARKER IDENTIFICATION 4CH LANGUAGE ITALIAN 335 1492 00 1 MARKER IDENTIFICATION 4CH LANGUAGE GERMAN 335 1493
28. BLY KNOB 470 DIAMETER 4 335 1480 00 1 MARKER IDENTIFICATION 2CH LANGUAGE FRENCH 335 1481 00 1 MARKER IDENTIFICATION 2CH LANGUAGE ITALIAN 335 1482 00 1 MARKER IDENTIFICATION 2CH LANGUAGE GERMAN 335 1483 00 1 MARKER IDENTIFICATION 2CH LANGUAGE SPANISH 335 1484 00 1 MARKER IDENTIFICATION 2CH LANGUAGE JAPANESE 335 1485 00 1 MARKER IDENTIFICATION 2CH LANGUAGE PORTUGUESE 335 1486 00 1 MARKER IDENTIFICATION 2CH LANGUAGE SIMPLIFIED CHINESE 335 1487 00 1 MARKER IDENTIFICATION 2CH LANGUAGE TRADITIONAL CHINESE 335 1488 00 1 MARKER IDENTIFICATION 2CH LANGUAGE KOREAN 335 1489 00 1 MARKER IDENTIFICATION 2CH LANGUAGE RUSSIAN 5 260 2820 00 1 SWITCH KEYPAD ELASTOMERIC FRONT PANEL 2CH MONO 260 2821 00 1 SWITCH KEYPAD ELASTOMERIC FRONT PANEL 2CH COLOR 6 211 1198 00 5 SCREW MACHINE 6 32 X 0 250 PNH STL ZNPL T 15 TORX DR 7 870 0188 01 1 CIRCUIT BD ASSY FRONT PANEL BOARD 2CH 389 3835 00 WIRED 8 441 2454 00 1 CHASSIS ASSEMBLY 2 CHANNEL 9 870 0008 00 1 CIRCUIT BD ASSY MAIN 2 CH 40MHZ TESTED amp CONFIGURED MONO 389 3843 00 WIRED TDS1001B 870 0009 00 1 CIRCUIT BD ASSY MAIN 2 CH 60MHZ TESTED amp CONFIGURED MONO 389 3843 00 WIRED TDS1002B 870 0010 00 1 CIRCUIT BD ASSY MAIN 2 CH 60MHZ TESTED 4 CONFIGURED COLOR 389 3843 00 WIRED TDS2002B 870 0012 00 1 CIRCUIT BD ASSY MAIN 2 CH 100MHZ TESTED 4 CONFIGURED MONO 389 3843 00 WIRED TDS1012B 870 0013 00 1 CIRCUIT BD ASSY MAIN 2 CH 100MHZ TESTED amp CONFIGURED COLOR 389 3843 00 WIRED TDS2012B
29. CH 2 and other input connectors pass through attenuators and an AC coupling switch to the amplifier ASIC The EXT TRIG input has an abbreviated version of this path lacking some of the attenuator settings and the AC coupling switch The amplifier ASIC contains buffers and 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 MQ 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 approximately the correct level to allow the fullest possible use of the digitizer The acquisition ASIC contains samplers and peak detectors for each input channel a common amplifier an A D converter and the trigger logic The digitized waveform samples are transferred to the processing and display ASIC In four channel systems the two acquisition ASICs are interconnected so that a trigger on one ASIC can cause a trigger on the other The processor system adds the microprocessor and flash PROM to the processing and display system The processor system interprets the front panel control changes detected by the display ASIC provides control parameters based upon user setting requests computes waveform measurements and manages the USB interfaces via the dedicated USB controller Saved setups waveforms and calibration con
30. Coupling Input Impedance DC Coupled P2220 Probe Attenuation Supported Probe Attenuation Factors Supported Current Probe Scales Maximum Voltage Between Signal and Reference at input BNC Channel to Channel Common Mode Rejection typical Channel to Channel Crosstalk DC AC or GND 1 MQ 2 in parallel with 20 pF 3 pF 1X 10X 1X 10X 20X 50X 100X 500X 1000X 5 V A 1 V A 500 mV A 200 mV A 100 mV A 20 mV A 10 mV A 1 mV A Overvoltage Category Maximum Voltage CAT I and CAT 300 Vams Derate at 20 dB decade above 100 kHz to 13 V peak AC at 3 MHz and above For non sinusoidal waveforms peak value must be less than 450 V Excursion above 300 V should be less than 100 ms duration and the duty factor is limited to 44 RMS signal level including any DC component removed through AC coupling must be limited to 300 V If these values are exceeded damage to the oscilloscope may result TDS1001B TDS1002B TDS2002B TDS1012B TDS2012B TDS2014B TDS2022B TDS2004B TDS2024B 100 1 at 60 Hz 100 1 at 60 Hz 100 1 at 60 Hz 20 1 at 20 MHz 20 1 at 30 MHz 10 1 at 50 MHz Measured on MATH Ch1 Ch2 waveform with test signal applied between signal and common of both channels and with the same VOLTS DIV and coupling settings on each channel Measured on MATH Ch3 Ch4 waveform for 4 channel models TDS1001B TDS1002B TDS2002B TDS1012B TDS2012B TDS2022B TDS2024B TDS2004B TDS2014B gt 100 1 at 20 MHz
31. Front Panel GND i y 3101 Color Display J90 J202 DC In gt 2 q 12 Lg Backlight ATA lis P O J2031 is m Probe Comp e LCD lt gt Display Control Signal 18 Pins J104 P O J2032 Probe Comp GND N CH1 SN J300 V O v lt PCor printer deb USB an 1 p V o J650 e V C e J680 e E 41201 Drive port Figure 3 2 Module level block diagram four channel 41202 TDS1000B and TDS2000B Series Oscilloscope Service Manual 3 3 Theory of Operation Main Board Acquisition System The Main board is also called the acquisition board The Main board of the four channel oscilloscopes is essentially 2 two channel oscilloscopes tied together through a common microprocessor and some special interconnects to support combining the display and trigger systems For this reason the focus of the main board discussion will be the two channel system with differences noted as necessary At a minimum the main board contains attenuators an amplifier ASIC a digitizer trigger system ASIC a signal processing display system services ASIC RAM flash PROM a system microprocessor USB controller USB RAM system communication RAM and special power supplies For a four channel oscilloscope the attenuators and ASICs are duplicated Most of the other aspects of the circuitry remain unchanged Signals from the CH 1
32. Performance Verification Push menu button Select menu option Select setting MEASURE Source Channel under test Type Mean The test operates without a trigger To maintain uniformity and to avoid false triggering on noise the Ext trigger is the recommended source 2 Make a spreadsheet approximately as shown in the example 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 TDS1000B and TDS2000B 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 Appendix A Example of a Vertical Position Accuracy Test Spreadsheet on page A 1 3 Connect the oscilloscope power supply and voltmeter as shown next Oscilloscope under test Voltmeter Power supply A Negative O ID O N _ cm rd BNC to Dual Banana adapter Red leads Black leads 4 Set the power supply to the 1 8 V value shown in column A the Approxi mate Test Voltage 5 Adjust the vertical position knob for the DC line to position the line in the center of the screen 6 Enter the voltage on the voltmeter and on the oscilloscope into the spread s
33. S 6 9 Rear PER E INE 6 9 Ironie P DEREN 6 10 Power Supply Module esses nnn 6 11 Internal Assembly anne peek Wo ha ie Aid n elec RI ns 6 12 Display Cable 2 22 22 Rex ad al PAT Ra 6 12 Front Panel Cable ti ey EE Ra 6 14 Main Board Module sasara ee ee el 6 15 Display Module ssc fcc eripi le RE ey ERR RR EE a ee Ra 6 16 Front Panel Module a 6 18 nase ie CU D el 6 18 NN E ernennt Delle 6 19 Troubleshooting a le 2 RP ERES 6 20 Adjustment After Repair o iua srera onaran PAARA APELA 6 20 Required Tools and Equipment 6 20 Troubleshooting Tree e m RR Rh seb et ees wees 6 20 PROBE COMP Output en 6 25 Troubleshooting the Power Supply 6 25 Troubleshooting the Display 6 26 Troubleshooting the Backlight 6 28 Troubleshooting the Front 1 6 30 Troubleshooting the Main Board 6 32 Running Diagnostics siseses tit EEr arera EREE EEE en 6 33 Troubleshooting Input 6 33 Troubleshooting the USB 6 34 Usine h Error Log ns een el 6 34 Repackaging Instructions erra akea en 6 36 Packaging ci irr
34. S1000B and TDS2000B Series Oscilloscope Service Manual Adjustment Procedures Table 5 2 Adjustment steps Cont Step number Step number Two channel Four channel models models Signal Signal source setting Input 54 54 Sinewave Generator 50 Ohm 5 kHz 1 Vp p CH2 55 55 Sinewave Generator 50 Ohm 1 MHz 100 mVp p 56 56 Sinewave Generator 50 Ohm 1 MHz 1 Vp p 57 57 Sinewave Generator 50 Ohm 50 kHz 1 Vp p 58 58 Sinewave Generator 50 Ohm 20 MHz 1 Vp p 59 59 Sinewave Generator 50 Ohm BWL 25 mV 60 60 Sinewave Generator 50 Ohm BWL 50 mVp p 61 61 Sinewave Generator 50 Ohm BWL 100 mV 62 62 Sinewave Generator 50 Ohm BWL 250 mV 63 63 Sinewave Generator 50 Ohm BWL 500 mV p 64 64 Sinewave Generator 50 Ohm BWL 1 Vp p 65 65 Sinewave Generator 50 Ohm 5 kHz 2 5 Vp p 66 66 Sinewave Generator 50 Ohm 1 MHz 2 5 Vp p 67 67 Sinewave Generator 50 Ohm 50 kHz 2 5 Vp p 68 68 Sinewave Generator 50 Ohm 20 MHz 2 5 Vp p 69 69 Sinewave Generator 50 Ohm BWL 2 5 Vp p 70 70 Sinewave Generator 50 Ohm BWL 5 Vp p 5 8 TDS1000B and TDS2000B Series Oscilloscope Service Manual Adjustment Procedures Table 5 2 Adjustment steps Cont Step number Two channel models NA Step number Four channel models Signal Signal source setting Input 71 Sinewave Generator 50 Ohm 5 kHz 1 Vp p CH3 72 Sinewa
35. S2022B TDS2024B TDS2004B TDS2014B 40 MHz t 60 MHz t 100 MHz t 200 MHz t 0 C to 35 32 F to 95 F 160 MHz t 0 C to 50 C 32 F to 122 F 20 MHz when vertical scale is set to lt 5 mV Accuracy of the nominal voltage level represented by the code at the center of the dynamic range of the A D converter TDS1001B TDS1001B TDS1002B TDS2002B TDS1012B TDS2012B TDS2014B TDS2022B TDS2024B TDS2004B 30 MHz t 50 MHz T 75 MHz t 20 MHz when vertical scale is set to lt 5 mV 20 MHz x 10 Hz at BNC lt 1 Hz when using a 10X passive probe TDS1001B TDS1002B TDS2002B TDS1012B TDS2012B TDS2022B TDS2024B TDS2004B TDS2014B 21ns Captures 50 or greater amplitude of pulses gt 12 ns wide typical 50 s div to 5 us div in the center 8 vertical divisions For TDS1001B the pulse must be at least 13 ns wide 8 4ns Specifications are with the Probe Voltage p Attenuation option set to 1X The selected value is the offset value indicated by the oscilloscope in the hint line not the measurement Bandwidth reduced to 6 MHz with a 1X probe and the Bandwidth Limit is turned off When vertical scale is set to gt 5 mV The oscilloscope reverts to Sample mode when the SEC DIV horizontal scale is set from 2 5 us div to 5 ns div on 1 GS s models or from 2 5 us div to 2 5 ns div on 2 GS s models The Sample mode can still capture 10 ns glitches TDS1000B and TDS2000B Series Oscill
36. Series Oscilloscope Service Manual AS AAA Specifications AA CS Specifications These specifications apply to all TDS1000B and TDS2000B series oscilloscopes To verify that an oscilloscope meets specifications it must first meet the following conditions m The oscilloscope must have been operating continuously for twenty minutes within the specified operating temperature You must perform the Do Self Cal operation accessible through the Utility menu if the operating temperature has changed by more than 5 C 9 F since the last time the Do Self Cal operation was performed m The oscilloscope must be within the factory calibration interval of one year Specifications begin in Table 1 1 All specifications are guaranteed unless noted typical Specifications that are marked with the 14 symbol are checked in the chapter Performance Verification Table 1 1 Oscilloscope specifications Acquisition Acquisition Modes Sample Peak Detect and Average Acquisition Rate Up to 180 waveforms per second per channel Sample acquisition mode no measurements typical Single Sequence Acquisition Mode Acquisition Stops After Sample Peak Detect Single acquisition all channels simultaneously Average N acquisitions all channels simultaneously N is selectable from 4 16 64 and 128 TDS1000B and TDS2000B Series Oscilloscope Service Manual 1 1 Specifications Table 1 1 Oscilloscope specifications Cont Inputs Input
37. Service Manual TDS1000B and TDS2000B Series Digital Storage Oscilloscopes 077 0356 00 AA 077035600 Service Manual Tektronix TDS1000B and TDS2000B Series Digital Storage Oscilloscopes 077 0356 00 This document applies to firmware version 1 00 and above Warning The servicing instructions are for use by qualified personnel only To avoid personal injury do not perform any servicing unless you are qualified to do so Refer to all safety summaries prior to performing service www tektronix com Copyright Tektronix All rights reserved Licensed software products are owned by Tektronix or its subsidiaries or suppliers and are protected by national copyright laws and international treaty provisions Tektronix products are covered by U S and foreign patents issued and pending Information in this publication supercedes 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 14200 SW Karl Braun Drive P O Box 500 Beaverton OR 97077 USA For product information sales service and technical support In North America call 1 800 833 9200 m Worldwide visit www tektronix com to find contacts in your area CA AEN Table of Contents General Safety Summary v Servi
38. Signal Interface connectors are mounted on the main board for all signal inputs The signal inputs are compatible with the supplied P2220 probes Probe Compensation The PROBE COMP and ground terminals are provided for probe adjustment External Trigger The EXT TRIG channel is processed on the chain containing the highest numbered normal input channel Main Board Power To support various functions on the main board a number of secondary power supplies are generated For the amplifier and acquisition ASICS the main board creates 2 5 V and 2 5 V supply The 42 5 V supply is derived from the 3 3 V logic supply The 2 5 V supply is derived from the 4 V supply One three terminal regulator provides 5 V for internal uses A second three terminal regulator provides USB power to preclude USB faults from seriously disrupting operation of the oscilloscope An additional power supply provides the LCD bias voltage which ranges from 19 V to 28 V depending on contrast setting and display type This 28 V supply has a temperature sensor on the front panel board that varies the output voltage of the supply to maintain contrast over a wide temperature range TDS1000B and TDS2000B Series Oscilloscope Service Manual 3 5 Theory of Operation Power Supply Display Module Front Panel 3 6 Two Channel Oscilloscopes The main power supply module for the TDS1000B and TDS2000B series oscilloscopes is a wide input range universal suppl
39. able out of the chassis Installation To install the display cable refer to Figure 8 3 and follow these steps 1 Remove the display module using the procedure on page 6 16 2 Attach the display cable to the appropriate connector on the display module at the location shown in Figure 8 3 12 pin for the monochrome display and 15 pin for the color display 3 With the display module in place but not connected thread the display cable through the appropriate slot on the chassis 4 Twist the cable to keep it from contact with the boards and chassis NOTE Wind up the display cable until it is tight loops are okay This keeps the cable bundle together 5 Connect the display cable at J201 on the main board by pushing the cable straight down into the connector 6 Secure the display cable to the chassis with the cable tie 7 Apply 3 strips of 3M Electrical Tape 92 to secure the cable to the chassis Figure 6 3 shows where to apply the tape for good results TDS1000B and TDS2000B Series Oscilloscope Service Manual 6 13 Maintenance Front Panel Cable Twist the display cable Add a cable tie Tape the cable to the chassis Figure 6 3 Securing the display cable to the chassis 8 Install the four screws to attach the display module to the internal assembly You will need a torque limiting Torx T 15 screwdriver and pliers for this procedure Removal To remove the front panel cable refer to Figure 8
40. al To remove the switch keypad refer to Figure 8 1 for 2 channel models or Figure 8 2 for 4 channel models and follow these steps 1 2 Remove the power button and rear case using the procedures on page 6 9 Remove the entire internal assembly from the front case using the procedure on page 6 12 Lift the keypad out of the front case TDS1000B and TDS2000B Series Oscilloscope Service Manual Maintenance CAUTION Keep the electrical contacts on the back of the keypad clean Skin oils and dust will inhibit good electrical contact Installation To install the switch keypad refer to Figure 8 1 for 2 channel models or Figure 8 2 for 4 channel models and follow these steps 1 Place the front case face down on a soft surface 2 Align the switch keypad into the front case using the guide posts and the holes in the keypad oils and dust will inhibit good electrical contact CAUTION Keep the electrical contacts on the back of the switch pad clean Skin 3 Check that all buttons are properly seated into place before proceeding 4 Place the entire internal assembly into the front case 5 Use the installation procedure for each module removed to reassemble the oscilloscope Front Case You will need a torque limiting Torx T 15 screwdriver for this procedure Removal To remove the front case refer to Figure 8 1 for 2 channel models or Figure 8 2 for 4 channel models and follow these steps 1 Remo
41. andwidth Sasa esa De ar 4 5 Check Sample Rate Accuracy and Delay Time Accuracy 4 6 Check Edge Trigger Sensitivity 4 8 Check External Edge Trigger Sensitivity 4 9 Check Vertical Position 4 11 Adjustment Procedures 5 1 Required Equipment 5 1 Adjustment Procedure 5 2 Enable the Service Menu 5 2 Adjustment Procedure 5 5 TDS1000B and TDS2000B Series Oscilloscope Service Manual i Table of Contents Maintenance san in e ME 6 1 Preventing FSD nat auge ars re Brille 6 1 Inspection and Cleaning iriser arak E nme 6 2 General Cate cese pere ee hacked ER ERES 6 2 Interior Cleaning sites cuts e eR dla el 6 2 Exterior Cleaning scrive re e rx RE Re 6 2 Removal and Installation Procedures 6 6 List of Modul s eek e esci a 6 6 Summary of Procedures 6 6 Required Tools erp Re ee Re 6 8 Rear Petinte ee eade eti defe 6 8 Flip Teet e uoce a ER RU ERES RE EE E ERES 6 8 Front Panel KnobS epe ex be Re e lek al ET a pe ea 6 9 PoWerBUutlon ee UR RE E CE MER G
42. annel models 8 7 TDS1000B and TDS2000B Series Oscilloscope Service Manual Replaceable Parts Table 8 3 Replaceable parts list power supply module cables and wires Fig amp index number 8 3 1 8 8 Tektronix part number 119 7228 00 174 4673 00 174 5150 00 174 4658 00 211 1198 00 211 1174 00 342 1673 00 346 0299 00 Serial no effective Serial no discont d Qty Name amp description POWER SUPPLY CABLES WIRES POWER SUPPLY CUSTOM TDS2000B SERIES AC DC 85 275 VAC 45 440HZ IN 6VDC 0 7A 3 3VDC 1 5A 4VDC 0 8A 35V 0 015A OUT PLUS CCFL BACKLIGHT INVERTER amp LINE TRIGGER OUTPUT SAFETY CONTROLLED CA ASSY SP DATA COLOR 7 0 L CA ASSY SP DATA MONO LCD TO CPU BD 7 0 INCH L MOLEX 51021 1200 TO AMP 1 353908 8 CA ASSY SP DISCRETE 26 AWG 5 5 L FEMALE 1 X 12 0 059 1 5 MM CTR DUAL EN DED FRONT PANEL SCREW MACHINE 6 32 X 0 250 PNH STL ZNPL T 15 TORX DR SCREW MACHINE W HEAVY PATCH THREADLOCKING MATERIAL 6 32 X 0 312 L PNH STL CAD PLT T15 CLAMP CABLE CABLE TIE NYLON 6 6 COLOR NATURAL BAND BAND PA TDS1000B and TDS2000B Series Oscilloscope Service Manual Replaceable Parts J400 Main channel assembly x M E N Durs Lo ZB P s Su J101 Se b Ww E Front panel Y 1 b E cable assembly Power supply module AD Sd a gt ower supply AS 2 ground wire ZA y d Chass
43. ase 6 19 front feet 6 10 front panel cable 6 14 front panel knobs 6 9 front panel module 6 18 internal assembly 6 12 keypad 6 18 main board module 6 15 power button 6 9 power supply module 6 11 rear case 6 9 rear feet 6 8 replaceable part definition ix Index 2 S sample rate and delay time accuracy test 4 6 self calibration 4 3 specifications 1 1 storage 6 36 T tools required removal and installation procedures 6 8 troubleshooting 6 20 trim 6 7 troubleshooting trees 6 20 U USB interface troubleshooting 6 34 user manual 2 1 V Vertical position accuracy test 4 11 example line graph 4 14 example spreadsheet A 1 TDS1000B and TDS2000B Series Oscilloscope Service Manual
44. bration constants 1 He e p A 10 11 Enable the Service menu as described on page 5 2 Push the Service option button Push the Factory Cal option button Push the Warmup Timer option button Push the Start Timer option button to ensure a 10 minute warm up After 10 minutes pass the oscilloscope displays a large black or green cross Press the front panel UTILITY button and push the Service option button Push the Factory Cal option button Push the FCAL INIT option button to initiate the factory calibration routine You are now in step 1 of the procedure As indicated by Step 1 in Table 5 2 connect a 0 0 Vpc source to the channel inputs Press FCAL STEP to load the calibration constant for step 1 Follow the screen prompts along with Table 5 2 for the remainder of the routine applying the proper signal for each step 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 12 13 If any step in the procedure fails the procedure terminates Failure will result if an incorrect signal source is connected If this happens you must start the procedure over from the beginning If the procedure completes successfully a Pass message is displayed and the new adjustment takes effect Compensate the signal path by performing the self calibration routine Disconnect any
45. carton in two prominent locations Storage The oscilloscope should be stored in a clean dry environment The following environmental characteristics apply for both shipping and storage oscilloscope not operating m Temperature range 40 C to 71 C 40 F to 159 8 F m Altitude To 3 000 m approximately 10 000 ft See the chapter Specifications for a complete listing of the environmental characteristics 6 36 TDS1000B and TDS2000B Series Oscilloscope Service Manual AS AAA Diagrams Diagrams This section describes the electrical operation of the TDS1000B and TDS2000B series oscilloscopes using the major circuit blocks or modules Figure 7 1 shows the oscilloscope module interconnections The shaded area in Figure 7 1 represents modules and circuits used only in four channel oscilloscopes TDS1000B and TDS2000B Series Oscilloscope Service Manual 7 1 Diagrams Display Power supply E Amplifier ASIC A Processor and Display A Amplifier ASIC B Main Board USB Power A interface Amplifier ASIC B Processor and Display B Acquisition AID ASIC B N Becomes part of chain A on 2 channel Amplifier ASIC B Microprocessor Trigger Note Shaded area is only p
46. ce Safety Summary vii Preface ius ne A a RR ix Manual Conventions s certa ian ctae ha eae ea RR Rcs ix Related Documentation sesasi cece ec ix Specifications ia ds vi ee I EE Rei el nl 1 1 Operating Information 2 1 Theory of Operation 3 1 Main Board os teen ace eoa alte abt oue E PE 3 4 Acquisition System nennen nenn 3 4 Processing and Display 3 5 Input Signal Interface eee ee 3 5 Probe Compensation 3 5 External Trigger tor btt ou lubet eti ose ate 3 5 Main Board Power 0 cece cece eee teen een 3 5 Power SUPPI oo O 3 6 Display Mod le ths Ia eoe deett i dte 3 6 Front Panel 15225 O 3 6 Two Channel Oscilloscopes 3 6 Four Channel Oscilloscopes 3 7 Performance Verification 4 1 Required Equipment x esae deae ra aan 4 1 Test Record saw AAA CR RO Cie ee i CR CAS 4 2 Performance Verification Procedures 4 3 NIMMT 4 3 Self Calibtation s ara AA a ar 4 3 Check DC Gain Accuracy 0 cece cece eee ene eee 4 4 Check B
47. cklight connector as shown in Figure 6 8 Record the voltage of the signal 5 Attach the probe tip to the other lead on the backlight connector as shown in Figure 6 8 Record the voltage of the signal TDS1000B and TDS2000B Series Oscilloscope Service Manual Maintenance Backlight voltage test points Figure 6 8 Measuring the backlight voltage 6 Add the results of both readings If a signal greater than 1400 Vpx px is present the backlight is probably defective Replace the display If the signal is not present proceed with step 7 7 Tf the signal is missing detach the display using the procedure on page 6 16 and probe the backlight connector leads again 8 Add the results of both readings If a signal greater than 1400 Vpx px is present the display is probably defective Replace it If the signal is not present the power supply module is probably defective Replace it TDS1000B and TDS2000B Series Oscilloscope Service Manual 6 29 Maintenance Troubleshooting the Front 6 30 Panel To troubleshoot an improperly functioning front panel follow these steps To execute the internal diagnostic tests remove all input signals from the oscilloscope and enable the Service menu as described on page 5 2 2 Push the UTILITY button and push the Service option button The following options appear Menu Comments Factory Cal Steps through the calibration routine steps Total Init Writes factory default sett
48. ctor on the main board TDS1000B and TDS2000B Series Oscilloscope Service Manual Maintenance Signal at J201 Pin 1 marked Description Monochrome No fixed pattern Depends upon Description Color No fixed pattern Depends upon with 4 display data display data Pin 2 No fixed pattern Depends upon No fixed pattern Depends upon display data display data Pin 3 No fixed pattern Depends upon No fixed pattern Depends upon display data display data Pin 4 No fixed pattern Depends upon No fixed pattern Depends upon display data display data Pin 5 Not connected No fixed pattern Depends upon display data Pin 6 Not connected No fixed pattern Depends upon display data Pin 7 Not connected No fixed pattern Depends upon display data Pin 8 Not connected No fixed pattern Depends upon display data Pin 9 24 Vpc 26 5 Vpc Pin 10 Ground Ground Pin 11 5 Vpc 5 Vpc Pin 12 HI when display active HI when display active Pin 13 Data rate clock Data rate clock 1 36 MHz Square wave 1 36 MHz Square wave Pin 14 Line rate clock Line rate clock 17 kHz 500 ns high pulse from low 11 4 kHz 500 ns high pulse from low baseline baseline Pin 15 Frame rate clock Frame rate clock 70 Hz 750 ns high pulse from low 43 Hz 350 ns high pulse from low baseline baseline Pin 16 Lows High gt 2 4 V Pin 17 Ground Ground Pin 18 Ground Ground 1 Value varies with tempera
49. e en le al ESTA Rea 6 36 SOLA a Int de cute 6 36 DIAM ua a ee u 7 1 Replaceable Parts vig Ue de een ER sois iei aM 8 1 Parts Ordering Information i si cacos eee cee nen 8 1 Using the Replaceable Parts List 8 3 Appendix A Example of a Vertical Position Accuracy Test Spreadsheet siii ein Di A 1 Index TDS1000B and TDS2000B Series Oscilloscope Service Manual Table of Contents List of Figures Figure 3 1 Module level block diagram two channel 3 2 Figure 3 2 Module level block diagram four channel 3 3 Figure 4 1 Example of a line graph for the Vertical Position Accuracy lest on a ees 4 14 Figure 5 1 Adjustment setups 5 4 Figure 6 1 Locator for trim and cabinet removal 6 7 Figure 6 2 Locator for internal modules 6 7 Figure 6 3 Securing the display cable to the chassis 6 14 Figure 6 4 Oscilloscope troubleshooting tree 1 of 4 6 21 Figure 6 5 Oscilloscope troubleshooting tree 2 of 4 6 22 Figure 6 6 Oscilloscope troubleshooting tree 3 of 4 6 23 Figure 6 7 Oscilloscope troubleshooting tree 4 of 4 6 24 Figure 6 8 Measuring the backlight voltage 6 29 Figure 7 1 TDS1000B and TDS2000B series block diagram 7 2 Figure 8 1 Exploded diagram
50. e front panel test Test FP and the screen test Test Screen Select Test FP to start the front panel controls test Push each button and rotate each knob to verify the operation of all controls If all buttons and knobs have passed the test pushing the lower menu button EXIT exits the test If any button fails to operate inspect and or clean the switch keypad and the front panel board contacts If cleaning does not solve the problem the switch keypad front panel board or main board may be defective Follow the remaining steps in this procedure below to isolate the problem 8 Replace the switch keypad and then retest the buttons If the problem persists proceed to step 9 9 Use the test oscilloscope and set the Attenuation switch to 10X on the P2200 probe to probe the front panel cable connector at J202 on the main board two channel models or J1 four channel models The table below describes the signals you should expect to see Signal at J202 2 channel models or J1 4 channel models 1FPLED 2 FPCLR 12 P Description LED latch line 6 44kHz High with 120 ns low pulses Location of pulse relative to FPCLR 12 P determines which lights are lit Clear Front Panel Scan line A 6 44kHz Low pulsing high with 50ns pulses Determines beginning of a scan sequence for first half of front panel 3FPCLK 12 P Front Panel Clock line A 405 kHz High with 50 ns pulses going low Each clock after FPCLR 12 P inc
51. e is particularly sensitive to ESD Read the board Removal To remove the main board module refer to Figure 8 3 and follow these steps 1 Remove the power button and rear case using the procedures on page 6 9 2 Remove the internal assembly from the front case using the procedure on page 6 12 3 Disconnect the following wires from the main board by pulling straight up from the connector m The power supply cable at J101 Press down on the latch while pulling up on the cable m The display cable at J201 The front panel cable at J202 4 Use the screwdriver to remove the three screws attaching the main board module to the internal assembly 5 Use the socket to remove the nuts and washers from the BNC connectors TDS1000B and TDS2000B Series Oscilloscope Service Manual 6 15 Maintenance Display Module 6 Pull the board out from the front slots of the internal assembly Installation To install the main board module refer to Figure 8 3 and follow these steps 1 Work from the bottom of the internal assembly and place the front of the main board module into the slots on the internal assembly near the the BNC connectors Use the deep socket to attach the washers and nuts to each BNC connector so that the main board is securely attached to the chassis Support the BNC to prevent it from twisting the main board and torque the nuts to 40 in Ibs 4 5 using the torque wrench Install the thre
52. e screws attaching the main board module to the internal assembly Reconnect the following wires on the main board m The power supply cable at J101 m The display cable at J201 m The front panel cable at J202 Use the installation procedure for each module removed to reassemble the oscilloscope You will need a torque limiting Torx T 15 screwdriver a torque limiting Torx 1 8 screwdriver and pliers for this procedure Removal To remove the display module refer to Figure 8 1 for 2 channel models or Figure 8 2 for 4 channel models and follow these steps 1 2 Remove the power button and rear case using the procedures on page 6 9 Remove the internal assembly from the front case using the procedure on page 6 12 Disconnect the backlight cable from the power supply module For color displays follow these steps a Remove the power supply module using the procedure on page 6 11 b Remove the four screws attaching the display module to the chassis The screws were exposed when the power supply module was removed TDS1000B and TDS2000B Series Oscilloscope Service Manual Maintenance 5 6 For monochrome displays remove the four screws attaching the display module to the internal assembly Disconnect the display cable using the procedure on page 6 12 NOTE Be careful that you do not loosen the mounting posts from the chassis If the mounting posts should become loosened it will be necessary to remove the
53. e the main board Failures that occur during the power up diagnostics or normal oscilloscope operation place an entry in the error log Accessing the error log The error log list can be accessed anytime by pushing the UTILITY button and selecting Error Log Table 6 4 lists the error codes and probable causes Table 6 4 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 DI MEMORY diagnostics failed Main board or power supply failure 4 DI CH1 diagnostics failed Main board or power supply failure 5 DI CH2 diagnostics failed Main board or power supply failure 6 DI Line trigger diagnostics failed Main board or power supply failure 7 DI ADG421 diagnostics failed Main board or power supply failure 12 DI CH3 diagnostics failed Main board or power supply failure 13 DI CH4 diagnostics failed Main board or power supply failure 14 DI ADG421 2 diagnostics failed Main board or power supply failure 15 DI ADG522 2 diagnostics failed Main board or power supply failure 16 DI DRAM diagnostics failed Main board or power supply failure 17 DI USB diagnostics failed Main board or power supply failure 255 Software Contact Tektronix TDS1000B and TDS2000B Series Oscilloscope Service Manual Maintenance Clearing the Error Log T
54. el number Part Number Revision Level Revision Level May Show as XX 25 DS 670 7918 03 670 7918 XX When you order parts Tektronix will provide you with the most current part for your product type serial number and modification if applicable At the time of your order Tektronix will determine the part number revision level needed for your product based on the information you provide Modules can be serviced by selecting one of the following two options Contact your local Tektronix service center or representative for repair assistance Module Exchange In some cases you may exchange your module for a reman ufactured module These modules cost significantly less than new modules and meet the same factory specifications For more information about the module exchange program call 1 800 833 9200 and select option 2 New Modules You may purchase replacement modules in the same way as other replacement parts TDS1000B and TDS2000B Series Oscilloscope Service Manual Replaceable Parts Using the Replaceable Parts List Column Column name 1 Figure 8 Index Number 2 Tektronix Part Number 3and4 Serial Number This section contains a list of the mechanical and or electrical components that are replaceable for the oscilloscope Use this list to identify and order replace ment parts The table below describes each column in the parts list Description Items in this section are referenced by figure and index numbers to the e
55. er supply module m The power supply cable on the main board at J101 Press down on the latch while pulling up on the cable 3 Remove the five screws connecting the power supply module to the chassis and lift the module from the internal assembly Installation To install the power supply module refer to Figure 8 3 and follow these steps 1 Align 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 Reconnect the following wire and cables m The ground wire on the power supply module to the chassis ground lug You may need to use pliers to secure the wire in place m The two conductor backlight cable to the power supply module m The power supply cable to the main board at J101 Twist the cable to keep it from contact with the boards and chassis NOTE Wind up the power supply cable until it is tight loops are okay This keeps the cable bundle together 5 Use the installation procedure for each module removed to reassemble the oscilloscope TDS1000B and TDS2000B Series Oscilloscope Service Manual 6 11 Maintenance Internal Assembly Display Cable You will need a torque limiting Torx T 15 screwdriver and a pair of pliers for this procedure Removal To remove the internal assembly refer to Figure 8 4 and follow these steps
56. fy that self calibration passed Check DC Gain Accuracy This test checks the DC gain accuracy of all input channels 1 Setthe DC voltage source output level to 0 V 2 Setup the oscilloscope using the following steps Push menu button Select menu option Select setting 1 DEFAULT SETUP 2 CH1 Probe 1X 3 ACQUIRE Average 16 4 MEASURE Source Channel under test Type Mean 3 As shown below connect the oscilloscope channel selected in the table to the DC voltage source DC voltage Digitizing oscilloscope source GA oa e EO OO au SONO S Dual banana to BNC adapter BNC cable 4 For each VOLTS DIV setting listed below perform the following steps a Set the DC voltage source output level to the positive voltage listed and then record the mean measurement as Vpos b Reverse the polarity of the DC voltage source and then record the mean measurement as c Calculate Vpos Vneg and then compare to the accuracy limits in the table 4 4 TDS1000B and TDS2000B Series Oscilloscope Service Manual Performance Verification Check Bandwidth VOLTS DIV setting Accuracy limits for 5 mV div 33 6 mV to 36 4 mV 200 mV div 1 358 V to 1 442 V 2 13 58 V to 14 42 V 5 Set DC voltage source output level to 0 V 6 Disconnect the test setup 7 Repeat steps 1 through 6 until all input channels have been checked This test checks the bandwidt
57. h of all input channels 1 Set up the oscilloscope using the following steps Push menu button Select menu option Select setting DEFAULT SETUP CH 1 Probe 1X ACQUIRE Average 16 TRIGGER Coupling Noise Reject MEASURE Source Channel under test Type Pk Pk 2 As shown below connect the oscilloscope channel selected in the table to the leveled sine wave generator Leveled sine wave Digitizing oscilloscope generator cO Q Output o QUO T 50 2 feedthrough BNC cable terminator 3 Set the oscilloscope VOLTS DIV to 500 mV div 4 Setthe oscilloscope SEC DIV to 10 us div TDS1000B and TDS2000B Series Oscilloscope Service Manual 4 5 Performance Verification 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 40 MHz if you are checking TDS1001B m 60 MHz if you are checking TDS1002B TDS2002B or TDS2004B m 100 MHz if you are checking a TDS1012B TDS2012B or TDS2014B m 200 MHz if you are checking a TDS2022B or TDS2024B 8 Set the oscilloscope SEC DIV to 10 ns div 9 Check that the peak to peak measurement is 22 12 V 10 Disconnect the test setup 11 Repeat steps 1 through 10 until all input channels have been checked Check Sample Rate This
58. heet in the appropriate columns B and C 7 Repeat steps 4 through 6 for the values of 1 76 V through 0 V 4 12 TDS1000B and TDS2000B Series Oscilloscope Service Manual Performance Verification 8 Swap the connections to the positive terminal of the power supply with those at the negative terminal as shown next Oscilloscope under test Power supply Voltmeter E O Positive QW QD BNC to Dual Banana adapter Red leads Black leads 9 Repeat steps 4 through 6 for the values of 0 04 V through 1 8 V 10 Enter the Minimum Margin number cell 116 for the channel tested in the test record 11 Repeat steps 1 through 10 until all input channels have been checked Data Verification To verify data set the spreadsheet to present a line graph of columns D E and F Verify that 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 TDS1000B and TDS2000B Series Oscilloscope Service Manual 4 13 Performance Verification 0 030 0 020 0 010 Measured Error 0 000 Error 7 Lower limit 0 010 Upper limit 0 020 0 030 3 00 200 1 00 000 1 00 200 3 00 Measured Position Figure 4 1 Exam
59. ic 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 surface Avoid handling modules in areas that have a floor or work surface covering capable of generating a static charge TDS1000B and TDS2000B Series Oscilloscope Service Manual 6 1 Maintenance Inspection and Cleaning General Care Interior Cleaning A Exterior Cleaning Inspection and cleaning are done as preventive maintenance Preventive maintenance when done regularly may prevent oscilloscope malfunction and enhance its reliability Preventive maintenance consists of visually inspecting and cleaning the oscilloscope and using general care when operating it How often you do maintenance depends on the severity of the environment in which you use the oscilloscope A good time to perform preventive maintenance is just before adjustment of the oscilloscope For optimum performance follow these recommendations Protect the oscilloscope from adverse weather conditions The oscilloscope is not waterproof m Do not store or leave the oscilloscope where the liquid crystal display LCD will be exposed to direct sunlight or high
60. illoscope gt E O w rar ome vo el el 100 70000 Some wes om Taf a us E sens ow vos ZU MINT spese sem oma oo af ta pese ewe ome oo vef e 107000 sens ose voz a ef e speso sene oma won sem oma con ef a E sene oma cow za INT O IN EC AE ww sm a oe ooe sone cow a ose ose oss ome sone ome cow so om oms ome some omw vos om o ome ome some oma cow A 2 DVM Measured Measured Voltage Voltage Lom _ ooo o 1 92 1 88 omo oa 1 ooo cx ases ir e uns ooo i tas 149 0010 oce oos Margin 0 018 0 018 0 027 0 027 0 026 0 026 0 026 0 025 0 015 Volts div Offset as a fractional division Offset in volts Total voltage offset Gain error Equation for cell D7 Equation for cell E7 Equation for cell F7 Equation for cell G7 0 05 0 1 0 005 0 01 12 14 15 1 B7 C7 F7 ABS B7 1 8 1 6 MIN D7 E7 F7 D7 TDS1000B and TDS2000B Series Oscilloscope Service Manual Appendix A Example of a Vertical Position Accuracy Test Sp
61. ing the current calibration by selecting FCAL ABORT NOTE While performing the adjustment procedure keep in mind that some of the steps take a significant amount of time up to 5 minutes to complete The equipment setups shown in Figure 5 1 are required to complete the adjustment procedure Table 5 2 on page 5 6 lists the steps in the procedure and the signal requirement for each step You must enable the Service menu to perform the adjustment procedure To do this Power on the oscilloscope Push the front panel MEASURE button to access the MEASURE menu Push the top option button to access the Measure 1 menu Push and hold the front panel SINGLE SEQ button Push and hold the front panel AUTOSET button er DE Wait at least two seconds TDS1000B and TDS2000B Series Oscilloscope Service Manual Adjustment Procedures 7 Release the SINGLE SEQ button 8 Release the AUTOSET button A message appears in the lower left corner of the screen stating Service mode ON 9 Push the front panel UTILITY button The last item in the Utility menu is now Service At completion of the Adjust procedure disable the Service menu through the UTILITY front panel button the Service option button and the Service Mode Off option button TDS1000B and TDS2000B Series Oscilloscope Service Manual 5 3 Adjustment Procedures DC voltage setup 1 Two Channel Four Channel Digitizing oscillo
62. ings to all saved setups writes factory default data to all reference waveforms turns off Service Mode and performs the same actions as the front panel DEFAULT SETUP button Service Diag Displays the service diagnostics menus Service Mode Off Disables the Service menu 3 Select Service Diag The following options appear 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 re run 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 cycle count to zero 4 Select Mfg Tests to start the front panel controls test The following options appear Menu Comments Test FP Displays a front panel simulation used to check the operation of all front panel controls All buttons must be pushed and all knobs must be turned in both directions before you can exit this test Test Screen Checks the display screen pixels with different patterns from each push of the button Contrast Allows you to check the display contrast operation across 100 of the hardware range TDS1000B and TDS2000B Series Oscilloscope Service Manual Maintenance Menu Comments Warmup Timer Ensures a ten minute warm up time for the oscilloscope before executing the calibration procedure Stop Test Exits th
63. is ground lug A Front panel assembly Display assembly Figure 8 3 Exploded diagram power supply module cables and wires TDS1000B and TDS2000B Series Oscilloscope Service Manual 8 9 Replaceable Parts Table 8 4 Replaceable parts list back case and trim Fig amp Inder Tektronix part Serialno Serial no number number effective discontd Qty amp description 8 4 BACK CASE TRIM 1 650 4973 00 1 REAR CASE ASSY COVER W FEET amp HANDLE TDS1000B TDS2000B SERIES 2 348 1703 00 1 FOOT FRONT FLIPMPC ABS SILVER GRAY 3 348 1704 00 1 FOOT REAR SANTOPRENE BLACK 4 211 1198 00 5 SCREW MACHINE 6 32 X 0 250 PNH STL ZNPL T 15 TORX DR 5 366 0856 00 1 PUSH BUTTON POWER 6 211 1143 00 5 SCREW PT K35 1 57 PAN HEAD T 15 8 10 TDS1000B and TDS2000B Series Oscilloscope Service Manual Replaceable Parts Removing E the rear feet a Bottom view remove or install foot squeeze at notches and swing one hinge free of slot or into place Figure 8 4 Exploded diagram back case and trim TDS1000B and TDS2000B Series Oscilloscope Service Manual Chassis assembly Use care to avoid touching the electrical contacts 19 FF lt Keypad 8 11 Replaceable Parts Table 8 5 lists the replaceable standard accessories for the oscilloscope and the instrument options that included them in the original shipment These accessories are not
64. lloscope Service Manual Adjustment Procedures Table 5 2 Adjustment steps Cont Step number Step number Two channel Four channel models models Signal Signal source setting Input Refer to the DC voltage setup 2 diagram 31 31 DC Voltage 2 5 0 V EXT TRIG 32 32 DC Voltage 2 1 0V 33 33 DC Voltage 2 1 0V 34 34 DC Voltage 2 5 0V Refer to the Sinewave generator setup diagram BWL refers to the maximum bandwidth of the oscilloscope 35 35 Sinewave Generator 50 Ohm 5 kHz 1 Vp p CH1 36 36 Sinewave Generator 50 Ohm 1 MHz 100 mVp p 37 37 Sinewave Generator 50 Ohm 1 MHz 1 Vp p 38 38 Sinewave Generator 50 Ohm 50 kHz 1 Vp p 39 39 Sinewave Generator 50 Ohm 20 MHz 1 Vp 40 40 Sinewave Generator 50 Ohm BWL 25 mVp p 41 41 Sinewave Generator 50 Ohm BWL 50 mVp p 42 42 Sinewave Generator 50 Ohm BWL 100 mV 43 43 Sinewave Generator 50 Ohm BWL 250 44 44 Sinewave Generator 50 Ohm BWL 500 mV p 45 40 Sinewave Generator 50 Ohm BWL 1 Vp p 46 46 Sinewave Generator 50 Ohm 5 kHz 2 5 Vp p 47 47 Sinewave Generator 50 Ohm 1 MHz 2 5 Vp p 48 48 Sinewave Generator 50 Ohm 50 kHz 2 5 Vp p 49 49 Sinewave Generator 50 Ohm 20 MHz 2 5 Vp p 50 50 Sinewave Generator 50 Ohm BWL 2 5 Vp p 51 51 Sinewave Generator 50 Ohm BWL 5 Vp p 52 52 Sinewave Generator 50 Ohm BWL 1 6 Vp p 53 53 Edge 50 Ohm Refer to Edge setup 1 kHz 0 to 800 mV diagram TD
65. lloscopes Unless noted otherwise the term oscilloscope refers to all models in the TDS1000B and TDS2000B series Manual Conventions This manual uses certain conventions that you should become familiar with before attempting service Modules Throughout this manual any replaceable component assembly or part is referred to by the term module A module is composed of electrical and mechanical assemblies circuit cards interconnecting cables and user accessible 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 appear in the Service Safety Summary found at the beginning of this manual Related Documentation Use these documents TDS1000B and TDS2000B Series Digital Storage Oscilloscopes User Manual available in 11 languages TDS200 TDS1000 2000 TDS1000B 2000B and TPS2000 Series Digital Oscilloscopes Programmer Manual To read about Installation and Operation Programmer Commands Analysis and Connectivity Tools Getting Started with OpenChoice Solutions Manual TDS1000B and TDS2000B Series Oscilloscope Service Manual ix Preface x TDS1000B and TDS2000B
66. lockwise A properly started screw will have very little resistance going in 4 Install the power button as described on page 6 9 You will need a torque limiting Torx T 15 screwdriver and pliers for this procedure Removal First remove the power button and rear case using the procedures on page 6 9 Then slide the front feet out of the front case as shown in Figure 8 1 for 2 channel models or Figure 8 2 for 4 channel models Installation Slide the feet into the slots provided in the front case as shown in Figure 8 1 for 2 channel models or Figure 8 2 for 4 channel models Use the installation procedures for each module removed to reassemble the oscilloscope 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 case is being reassembled TDS1000B and TDS2000B Series Oscilloscope Service Manual Maintenance Power Supply Module Use a torque limiting Torx T 15 screwdriver and pliers for this procedure Removal To remove the module refer to Figure 8 3 and follow these steps 1 Remove the power button and rear case using the procedures on page 6 9 2 Disconnect the following wires m The ground wire on the power supply module from the chassis ground lug m The two conductor backlight cable on the pow
67. loscope tests Oscilloscope tests Low limit Test result High limit Channel 1 DC Gain Accuracy 33 6 mV 36 4 mV 1 358 V 1 442 V 13 58 V 1442 V Channel 2 DC Gain Accuracy 33 6 mV 36 4 mV 1 358 V 1 42 V 13 58 V 1442 V Channel 3 DC Gain Accuracy 33 6 mV 36 4 mV 1 358 V 1 442 V 13 58 V 1442 V Channel 4 DC Gain Accuracy 33 6 mV 36 4 mV 1 358 V 1 442 V 13 58 V 1442 V Channel 1 Bandwidth 2 12 V Channel 2 Bandwidth 2 12 V Channel 3 Bandwidth 2 12 V Channel 4 Bandwidth 2 12 V 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 Stable trigger 3 Channel 4 Edge Trigger Sensitivity Stable trigger 3 External Edge Trigger Sensitivity Stable trigger 3 4 2 TDS1000B and TDS2000B Series Oscilloscope Service Manual Performance Verification Oscilloscope tests Channel 1 Vertical Position Accuracy Minimum margin 0 Channel 2 Vertical Position Accuracy Minimum margin 0 Channel 3 Vertical Position Minimum margin 0 Channel 4 Vertical Position Accuracy Minimum margin 0 Low limit Test result High limit 1 Channels 4 are only available on four channel oscilloscopes The bandwidth test does not have a high limit 3 Thelimits vary by model Check the procedure for the correct limits Performance Verification Procedures A
68. necessary and then check that triggering is stable 14 Change the oscilloscope setup using the following step Push menu button Select menu option Select setting 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 results of this test and the DC Gain Accuracy test together define the DC Accuracy Measurement Accuracy of the oscilloscope The DC Measurement Accuracy specification encompasses two different ranges of operation over two different attenuator settings m DC Gain Accuracy Identifies errors mostly from the A D converter when the vertical position known as offset in these oscilloscopes is set to 0 divisions or a grounded input will show screen center m Vertical Position Accuracy Identifies errors mostly from the position control made when the vertical position is set to a non zero value The two attenuator settings operate identically so verification of the attenuation range from 1 8 V to 1 8 V also verifies the attenuation range of 45 V to 45 V To set up the test follow these steps 1 Set up the oscilloscope as shown in the next table Push menu button Select menu option Select setting DEFAULT SETUP CH 1 CH 2 CH 3 CH 4 Probe 1X CH 1 CH 2 CH 3 CH 4 Volts Div 50 mV div TRIGGER Source Ext Mode Auto ACQUIRE Sample TDS1000B and TDS2000B Series Oscilloscope Service Manual 4 11
69. o clear the error log after fixing a problem follow these steps 1 Enable the Service menus as described on page 5 2 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 TDS1000B and TDS2000B Series Oscilloscope Service Manual 6 35 Maintenance Repackaging Instructions Use these procedures to repackage the oscilloscope for shipment or storage Packaging Use a corrugated cardboard shipping carton having a test strength of at least 125 kg 275 pounds and with an inside dimension at least 15 25 cm six inches greater than the oscilloscope dimensions Make sure that the oscilloscope is adequately padded with a cushioning material like foam paper or bubble wrap The oscilloscope should not move around inside of the carton when sealed If the oscilloscope is being shipped to a Tektronix Service Center enclose the following information m The owner address m Name and phone number of a contact person Type and serial number of the oscilloscope m Reason for returning m 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
70. o reassemble the oscilloscope TDS1000B and TDS2000B Series Oscilloscope Service Manual 6 17 Maintenance Front Panel Module Keypad You will need a torque limiting Torx T 15 screwdriver and a flat blade screw driver for this procedure Removal To remove the front panel module refer to Figure 8 1 for 2 channel models or Figure 8 2 for 4 channel models and follow these steps 1 2 Remove the power button and rear case using the procedures on pages 6 9 Remove the entire internal assembly from the front case using the procedure on page 6 12 Disconnect the front panel cable at J202 on the main board by pulling straight up from the connector Remove the five screws attaching the front panel module to the internal assembly Pull the module away from the internal assembly Installation To install the front panel module refer to Figure 8 1 for 2 channel models or Figure 8 2 for 4 channel models and follow these steps 1 Reconnect the front panel cable at J202 on the main board by pushing the cable straight down into the connector Route the front panel cable through the opening in the internal assembly For more information see the procedure on page 6 14 Install the five screws to attach the front panel module to the internal assembly Use the installation procedure for each module removed to reassemble the oscilloscope You will need a torque limiting Torx T 15 screwdriver for this procedure Remov
71. ooting the Main Board page 6 32 No signal Troubleshooting the To troubleshoot the power supply follow these steps Power Supply Refer to Troubleshooting the Power Supply page 6 25 1 Remove the rear case using the procedure Rear Case on page 6 9 2 Use the test oscilloscope to measure the voltages from the power supply module at J101 on the main board module The table below lists the voltages you should expect to see Maximum 101 J101 current power return Derived Supply Voltage range draw pins pins supplies 35V 30 Vpc to 40 Vpc floating 15 mA 1 2 28 V LCD Pin 2 connected to 3 3 V on the main board 6 V 5 5 V to 6 5 V 0 7A 4 3 5 8 5V 10 3 3 V 3 0 V to 3 6 V Requires 15A 6 7 3 5 8 33V 2 5 V minimum load to maintain 10 regulation 4V 5 0 V to 3 5 V 0 8 A 9 3 5 8 2 5 V 10 Line trigger 2 V to 6 V open circuit 1 11 3 5 8 Line trigger 10 1 diode drop when at tached to the main board TDS1000B and TDS2000B Series Oscilloscope Service Manual 6 25 Maintenance 6 26 Troubleshooting the Display Supply Backlight mono chrome or color Voltage range Maximum current draw J101 power pins NA J101 return pins NA Derived supplies NA With W minimum load still functions with no load 3 Ifall of the voltages are present the main board is probably defective Replace it 4 Ifall
72. operty including the product The following symbols may appear on the product CAUTION Protective Ground Earth Terminal Mains Disconnected Refer to Manual Earth Terminal Chassis Ground OFF Power Mains Connected ON Power TDS1000B and TDS2000B Series Oscilloscope Service Manual AAA AAA Service Safety Summary Only qualified personnel should perform service procedures Read this Service Safety Summary and the General Safety Summary before performing any service procedures Do Not Service Alone Do not perform internal service or adjustments of this product unless another person capable of rendering first aid and resuscitation is present Disconnect Power To avoid electric shock 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 replacing components To avoid electric shock do not touch exposed connections TDS1000B and TDS2000B Series Oscilloscope Service Manual vii Service Safety Summary vi TDS1000B and TDS2000B Series Oscilloscope Service Manual ASA AA Preface This service manual provides information to verify performance of calibrate troubleshoot disassemble and replace parts on the TDS1000B and TDS2000B Series Digital Storage Osci
73. or TDS2024B 9 Set the oscilloscope SEC DIV to 5 ns div 10 Set the leveled sine wave generator output level to approximately 750 so that the measured amplitude is approximately 750 mV The measured amplitude can fluctuate around 750 mV 11 Push SET TO 50 Adjust TRIGGER LEVEL as necessary and then check that triggering is stable 12 For the TDS2022B and TDS2024B models set the frequency to 200 MHz and increase the amplitude to 1 Vp p Verify stable triggering 13 Set the oscilloscope SEC DIV to 2 5 ns div 14 Change the oscilloscope setup using the following step Push menu button Select menu option Select setting 15 Push SET TO 50 Adjust TRIGGER LEVEL as necessary and then check that triggering is stable 16 Disconnect the test setup 17 Repeat steps 1 through 16 until all input channels have been checked This test checks the edge trigger sensitivity for the external trigger 1 Set up the oscilloscope using the following steps Push menu button Select menu option Select setting DEFAULT SETUP CH 1 Probe 1X TRIGGER Source Ext Mode Normal ACQUIRE Sample MEASURE Source CH1 Type Pk Pk TDS1000B and TDS2000B Series Oscilloscope Service Manual 4 9 Performance Verification 2 wave generator o o o o Bez Output O S Ye Connect the oscilloscope to the leveled sine wave generator as shown below using CH 1 and EXT TRIG Leveled sine Digitizing oscillosco
74. or part is referred to by the term module WARNING Only qualified personnel should perform service procedures Before doing this or any other procedure in this manual read the General Safety Summary and Service Safety Summary found at the beginning of this manual To prevent damage to electrical components read Preventing ESD on page 6 1 Always disconnect the power cord before disassembling any portion of the oscilloscope Complete disassembly is best achieved by following the procedures in the order given in Table 6 3 Table 6 3 List of procedures Procedure Begins on page Rear Feet 6 8 Flip Feet 6 8 Front Panel Knobs and Power Button 6 9 Rear Case 6 9 Front Feet 6 10 Power Supply Module 6 11 Internal Assembly 6 12 Display Cable 6 12 Front Panel Cable 6 14 Main Board Module 6 15 Color Display Module 6 16 Monochrome Display Module 6 16 Front Panel Module 6 18 Keypad 6 18 Front Case 6 19 TDS1000B and TDS2000B Series Oscilloscope Service Manual Maintenance Rear case Rear foot Front flip foot Q lt Power button Front Case assembly amp 2 Front foot Figure 6 1 Locator for trim and cabinet removal Main board Power supply assembly Switch keypad Display assembly Front panel assembly Figure 6 2 Locator for internal modules 6 7 TDS1000B and TDS2000B Series Oscilloscope Service Manual Maintenance 6 8
75. or some of the voltages are missing turn off the oscilloscope and disconnect the cable at connector J101 on the main board module 5 Turn on the oscilloscope and check the voltages at the loose end of the cable disconnected from J101 checking for the same voltages as in step 2 6 Ifallofthe voltages are missing check the line fuse on the power supply module If the fuse is defective replace the power supply module 7 Ifthe fuse is okay and all or some of the voltages are missing the power supply module is probably defective Replace it To troubleshoot a nonfunctional display follow these steps Remove the rear case using the procedure Rear Case on page 6 9 2 Turnon the oscilloscope and ensure that the display lights up If it does not either the display or power supply is defective If this procedure is not conclusive continue with Troubleshooting the Power Supply on page 6 25 NOTE Without a functional display module the simplest way to verify that the oscilloscope is on and functioning is to check for a signal at the PROBE COMP output The PROBE COMP output generates approximately a 5 V 1 kHz square wave 3 Use the test oscilloscope and set the Attenuation switch to 10X on the P2200 probe to probe the display cable connector at J201 on the main board The following table describes the signals you should expect to see See the exploded diagrams in Replaceable Parts for the location and orientation of the conne
76. oscope Service Manual 1 3 Specifications Table 1 1 Oscilloscope specifications Cont Vertical Gain Accuracy Volts Measurement Repeatability Average Acquisition Mode DC Measurement Accuracy Average Acquisition Mode Horizontal Sample Rate Range Waveform Interpolation Record Length SEC DIV Range Sample Rate and Delay Time Accuracy 3 for Sample or Average acquisition mode 5 V div to 10 mV div 4 for Sample or Average acquisition mode 5 mV div and 2 mV div 3 x reading 0 05 div Delta volts between any two averages of gt 16 waveforms acquired under same setup and ambient conditions Measurement Type Accuracy Average of 16 waveforms with vertical 3 x reading 0 1 div 1 mV when 10 mV div or position at zero greater is selected Average of 16 waveforms with vertical scale 3 x reading vertical position 1 of vertical with Vertical Scale 2 mV div to 200 mV div and position 0 2 div 7 mV 1 8 V lt Vertical Position lt 1 8V Average of 16 waveforms with vertical position with Vertical Scale gt 200 mV div and 45 V lt Vertical Position lt 45 V 3 x reading vertical position 1 of vertical position 0 2 div 175 mV TDS1001B TDS1002B TDS2004B TDS2022B TDS2024B TDS2002B TDS2012B TDS2014B 5 5 S s to 1 GS s to 1 GS s 5 S s to 2 GS s sin x x 2500 samples for each channel TDS1001B TDS1002B TDS2004B TDS202
77. oximately 10 000 ft Random Vibration Operating 0 31 grms from 5 Hz to 500 Hz 10 minutes on each axis Non Operating 2 46 grms from 5 Hz to 500 Hz 10 minutes on each axis Mechanical Shock Operating 50 g 11 ms half sine 1 8 TDS1000B and TDS2000B Series Oscilloscope Service Manual Specifications Table 1 2 Oscilloscope general specifications Cont Mechanical Size 158 mm 6 220 in 326 3 mm 12 845 in 124 1 mm 4 885 in Weight approximate 2 0 kg 4 375 lbs Adjustable through the Display menu T defined in IEC 61010 1 2001 TDS1000B and TDS2000B Series Oscilloscope Service Manual 1 9 Specifications 1 10 TDS1000B and TDS2000B Series Oscilloscope Service Manual AS AAA Operating Information Operating Information For information on installing and operating your TDS1000B and TDS2000B Series Digital Storage Oscilloscope refer to the TDS1000B and TDS2000B Series Digital Storage Oscilloscope User Manual The user manuals are available in eleven languages and are on the Web at www tektronix com TDS1000B and TDS2000B Series Oscilloscope Service Manual 2 1 Operating Information 2 2 TDS1000B and TDS2000B Series Oscilloscope Service Manual d Theory of Operation PA Theory of Operation This chapter describes the electrical operation of the TDS1000B and TDS2000B series oscilloscopes to the module level It describes the basic operation of each func
78. p p 97 Sinewave Generator 50 Ohm BWL 100 98 Sinewave Generator 50 Ohm BWL 250 mVp p 99 Sinewave Generator 50 Ohm BWL 500 mVp p 100 Sinewave Generator 50 Ohm BWL 1 Vp p 101 Sinewave Generator 50 Ohm 5 kHz 2 5 Vp p 102 Sinewave Generator 50 Ohm 1 MHz 2 5 Vp p 103 Sinewave Generator 50 Ohm 50 kHz 2 5 Vp p 104 Sinewave Generator 50 Ohm 20 MHz 2 5 Vp p 105 Sinewave Generator 50 Ohm BWL 2 5 Vp p 106 Sinewave Generator 50 Ohm BWL 5 Vp p 5 10 TDS1000B and TDS2000B Series Oscilloscope Service Manual Y A Maintenance Maintenance This chapter contains the information needed to do periodic and corrective maintenance on the oscilloscope as well as repackaging instructions if you need to return the oscilloscope to Tektronix for service Preventing ESD Before servicing this product read the Safety Summary and Introduction at the front of the manual and the electrostatic discharge ESD information below oscilloscope N CAUTION Static discharge can damage any semiconductor component in this When performing any service which requires internal access to the oscilloscope adhere to the following precautions These precautions help you avoid damaging internal modules and their components due to electrostatic discharge ESD Minimize handling of static sensitive modules Transport and store static sensitive modules in their static protected containers or on a metal rail Label any package that contains stat
79. pe Sore 00000 50 Q Power dider Male SMA to feedthrough female BNC terminator IE 3 Pieces 2 SMA female to female 3 Set the oscilloscope VOLTS DIV to 100 mV div 4 Set the oscilloscope SEC DIV to 25 ns div 5 Set the leveled sine wave generator frequency to 10 MHz 6 Set the sine wave generator output level to approximately 300 into the power splitter This will be about 200 mV on of the oscilloscope The EXT TRIG input will also be receiving approximately 200 mVp p Small deviations from the nominal 200 mV oscilloscope display are acceptable 7 Set the leveled sine wave generator frequency to 40 MHz if you are checking TDS1001B m 60 MHz if you are checking a TDS1002B TDS2002B or TDS2004B m 100 MHz if you are checking a TDS1012B TDS2012B TDS2014B TDS2022B or TDS2024B 8 Setthe oscilloscope SEC DIV to 5 ns div 9 Push SET TO 50 Adjust TRIGGER LEVEL as necessary and then check that triggering is stable 10 For TDS2022B and TDS2024B models set the sine wave generator output level for a CH 1 display to approximately 350 mV 11 For TDS2022B and TDS2024B models set the sine wave generator frequency to 200 MHz TDS1000B and TDS2000B Series Oscilloscope Service Manual Performance Verification 12 Set the oscilloscope SEC DIV to 2 5 ns div 13 Push SET TO 50 Adjust TRIGGER LEVEL as
80. place Rear Case You will need a torque limiting Torx T 15 screwdriver and pliers for this procedure Removal To remove the rear case refer to Figure 8 4 and follow these steps 1 Remove the power button using the procedure on page 6 9 2 Place the oscilloscope face down on a soft surface such as an anti static mat 3 Remove the five screws located on the rear case Tilt the handle to gain better access to the top two screws 4 Lift the rear case off of the oscilloscope TDS1000B and TDS2000B Series Oscilloscope Service Manual 6 9 Maintenance Front Feet Installation Use this procedure to install the rear case 1 Place the oscilloscope face down on a soft surface such as an anti static mat 2 Place the rear case onto the assembled oscilloscope and ensure that m All of the edges align with the front case m The Li ION battery is vertical in the battery location The slots align near the USB connector and near the battery CAUTION Be careful not to pinch any wires or other parts between the front and rear cases 3 Install the five screws in the rear case Tilt the handle to better access the top two holes CAUTION Avoid cross threading the screws that secure the rear case to the front case An easy way to avoid this is to slip the screw into the hole and using slight pressure slowly rotate the screw counterclockwise until you feel the screw slip into the screw threads Then tighten the screw c
81. ple of a line graph for the Vertical Position Accuracy test 4 14 TDS1000B and TDS2000B Series Oscilloscope Service Manual AAA EEE EP Adjustment Procedures AA J Adjustment Procedures Required Equipment This chapter contains adjustment procedures for the TDS1000B and TDS2000B series oscilloscopes Only qualified personnel should perform service procedures Read the Service Safety Summary and the General Safety Summary at the beginning of this manual before performing any service procedures Also refer to the user manual for information about using the TDS1000B and TDS2000B oscilloscopes NOTE The voltage references inside the TDS1000B and TDS2000B oscilloscopes are very stable over time and should not require routine updates Before performing any procedure in this chapter first verify that the oscilloscope does not meet specifications Refer to the chapter Performance Verification to verify the specifications The equipment described in Table 5 1 or a suitable equivalent is required to complete these procedures Table 5 1 Required equipment Description Minimum requirements Examples DC Voltage Source 20 V to 20 V 0 196 accuracy Wavetek 9100 Universal Calibration System with Oscilloscope Calibration Module Option 250 Leveled Sinewave 5 kHz and 200 MHz 0 696 Fluke 5500A Multi product Generator amplitude accuracy Calibrator with Oscilloscope Calibration Option Option 5500A SC
82. power switch disconnects the product from the power source See instructions for the location Do not block the power switch it must remain accessible to the user at all times Do Not Operate Without Covers Do not operate this product with covers or panels removed Do Not Operate With Suspected Failures If you suspect there is damage to this product have it inspected by qualified service personnel Avoid Exposed Circuitry Do not touch exposed connections and components when power is present Do Not Operate in Wet Damp Conditions Do Not Operate in an Explosive Atmosphere Keep Product Surfaces Clean and Dry TDS1000B and TDS2000B Series Oscilloscope Service Manual V General Safety Summary Terms in this Manual Symbols and Terms on the Product vi Provide Proper Ventilation Refer to the manual s installation instructions for details on installing the product so it has proper ventilation These terms may appear in this manual WARNING Warning statements identify conditions or practices that could result in injury or loss of life CAUTION Caution statements identify conditions or practices that could result in damage to this product or other property These terms may appear on the product DANGER indicates an injury hazard immediately accessible as you read the marking m WARNING indicates an injury hazard not immediately accessible as you read the marking m CAUTION indicates a hazard to pr
83. r Before using any other type of cleaner consult your Tektronix Service Center or representative Exterior Inspection Inspect the outside of the oscilloscope for damage wear and missing parts using Table 6 1 as a guide Immediately repair defects that could cause personal injury or lead to further damage to the oscilloscope Table 6 1 External inspection check list Item Front and rear case Inspect for Cracks scratches deformations damaged hardware Repair action Repair or replace defective module Front panel knobs Missing damaged or loose knobs Repair or replace missing or defective knobs Connectors Broken shells cracked insulation 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 If the display is very dirty moisten the wipe with distilled water or a 75 isopropyl alcohol solution and gently rub the display surface Avoid using excess force or you may damage the plastic display surface CAUTION To prevent getting moisture inside the oscilloscope during external cleaning use only enough liquid to dampen the cloth or applicator
84. r Type Holdoff Range Pulse Width trigger Pulse Width Trigger modes Pulse Width Trigger Point 1 6 Range 8 divisions from center of screen AC Line Accuracies are for signals having rise and fall times 20 ns Source Can not be set Accuracy 0 2 div x volts div within 4 divisions from center screen EXT 6 of setting 40 mV for signals within 800 mV EXT 5 6 of setting 200 mV for signals within 4 V Operates with input signals 50 Hz Coupling is AC and Auto mode except for a single sequence acquisition Composite video signal Source Range Peak to peak amplitude of 2 divisions XT 400 mV EXT 5 Supports NTSC PAL and SECAM broadcast systems for any field or any line n lt 500 ns to 10s Trigger when Less than gt Greater than Equal or Not Equal Positive pulse or Negative pulse Equal The oscilloscope triggers when the trailing edge of the pulse crosses the trigger level Not Equal If the pulse is narrower than the specified width the trigger point is the trailing edge Otherwise the oscilloscope triggers when a pulse continues longer than the time specified as the Pulse Width Less than The trigger point is the trailing edge Greater than also called time out trigger The oscilloscope triggers when a pulse continues longer than the time specified as the Pulse Width TDS1000B and TDS2000B Series Oscilloscope Service Manual Specifications Table
85. readsheet A eg ge E T om ome nam vos ss IR E EC ome vow oe orn E O cow oss ome oos oma cow oe ose ome ome oos om o of omo oef cow JE ose ame nf oe 050170001 oos oma cow MI IE E oos oma cow af om na ono EZ oma cow oo o oaf cow os orfo sons omse vos u o o 032 omo oor omw vos i oa omom sons oma cow i 02070004 none oma cow oa o ome ome o oef ove vefom mom sons vas o o vefom none ome cow ow ofon omo oma cow E oom om of omepem onf o cow a come om ao some con o onome oma ome cow 50 016 ose ome sr oe E vore von 50 020 ome oze n nora some on a oz ozons on some cow om os cow oe oss ET soe cow oa ome nore some cow a oaf one ose oor 1016900009 va
86. recautions to avoid injury and prevent damage to this product or any products connected to it To avoid potential hazards use this product only as specified Only qualified personnel should perform service procedures To Avoid Fire or Use Proper Power Cord Use only the power cord specified for this product and Personal Injury certified for the country of use Connect and Disconnect Properly Connect the probe output to the measurement instrument before connecting the probe to the circuit under test Connect the probe reference lead to the circuit under test before connecting the probe input Disconnect the probe input and the probe reference lead from the circuit under test before disconnecting the probe from the measurement instrument Ground the Product This product is grounded through the grounding conductor of the power cord To avoid electric shock the grounding conductor must be connected to earth ground Before making connections to the input or output terminals of the product ensure that the product is properly grounded Observe All Terminal Ratings To avoid fire or shock hazard observe all ratings and markings on the product Consult the product manual for further ratings information before making connections to the product Connect the probe reference lead to earth ground only Do not apply a potential to any terminal including the common terminal that exceeds the maximum rating of that terminal Power Disconnect The
87. rements the scan location by one 4 FPDATA 12 P Front Panel Scan Data line A No fixed pattern Stable when triggered from FPCLR 12 P Pattern depends upon rotation of knobs being scanned 5 GND 0 V ground 6 FPTHERMSTR P Front Panel Temp Sense About 2 Vpc depending upon temperature contrast setting and display type PWR3 3V 3 3 TDS1000B and TDS2000B Series Oscilloscope Service Manual 6 31 Maintenance Signal at J202 2 channel models or J1 4 channel models 8 FPTHERMGND P Description Temp Sense Return Ground 9 GND 0 V ground 10 FPDATA 34 P 11 FPCLR 34 P Front Panel Scan Data line B No fixed pattern Stable when triggered from FPCLR 34 P Pattern depends upon rotation of knobs being scanned Front Panel Clock line B 405 kHz High with 50 ns pulses going low Each clock after FPCLR 34 P increments the scan location by one 12 FPCLK 34 P Clear Front Panel Scan line B 6 44 kHz Low pulsing high with 50 ns pulses Determines beginning of a scan sequence for second half of front panel 1 Unused and open on two channel models Unused and tied low on two channel models 10 If all of the signals are present the front panel board is probably defective Replace it 11 If some or all of the signals are missing continue with step 12 12 Turn off the oscilloscope and disconnect the front panel cable from the main board at connector
88. resent in 4 channel models Figure 7 1 TDS1000B and TDS2000B series block diagram 7 2 TDS1000B and TDS2000B Series Oscilloscope Service Manual AS AAA Replaceable Parts por A Replaceable Parts This chapter contains a list of the replaceable modules for the TDS1000B and TDS2000B oscilloscopes Use this list to identify and order replacement parts Parts Ordering Information Replacement parts are available through your local Tektronix field office or representative Changes to Tektronix products are sometimes made to accommodate improved components as they become available and to give you the benefit of the latest improvements Therefore when ordering parts it is important to include the following information in your order Part number Instrument type or model number Instrument serial number W Instrument modification number if applicable If you order a part that has been replaced with a different or improved part your local Tektronix field office or representative will contact you concerning any change in part number Change information if any is located at the rear of this manual TDS1000B and TDS2000B Series Oscilloscope Service Manual 8 1 Replaceable Parts 8 2 Part Number Revision Level Module Servicing 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 lev
89. rigger Sensitivity This test checks the edge trigger sensitivity for all input channels 1 Set up the oscilloscope using the following steps 4 8 Push menu button Select menu option Select setting DEFAULT SETUP CH 1 Probe 1X TRIGGER Mode Normal ACQUIRE Sample MEASURE Source Channel under test Type Pk Pk 2 As shown below connect the oscilloscope channel selected in the table to the leveled sine wave generator Leveled sine wave generator Digitizing oscilloscope 2000 3 Output e o O utpu OO 50 Q feedthrough BNC cable terminator 3 Set the oscilloscope VOLTS DIV to 500 mV div 4 Set the oscilloscope SEC DIV to 25 ns div 5 Set the leveled sine wave generator frequency to 10 MHz 6 Set the leveled sine wave generator output level to approximately 500 so that the measured amplitude is approximately 500 mV The measured amplitude can fluctuate around 500 mV 7 Push SET TO 50 Adjust TRIGGER LEVEL as necessary and then check that triggering is stable 8 Set the leveled sine wave generator frequency to 40 MHz if you are checking a TDS1001B 60 MHz if you are checking a TDS1002B TDS2002B or TDS2004B TDS1000B and TDS2000B Series Oscilloscope Service Manual Performance Verification Check External Edge Trigger Sensitivity m 100 MHz if you are checking a TDS1012B TDS2012B TDS2014B TDS2022B
90. rtical position accuracy VPA test spreadsheet that is used on page 4 11 The PDF version of the TDS1000B and TDS2000B service manual Tektronix part number 077 0356 00 this manual includes an empty VPA test spreadsheet for your convenience To access and save the test spreadsheet 1 Go to the Tektronix Web site www tektronix com and click on the Manuals link in the left column on the screen Enter 077035600 in the Search By Keyword field and then click Go Click the TDS1000B and TDS2000B Series Service Manual link Click the Download File button and follow on screen instructions to save the PDF file to your PC Open the PDF file in Adobe Reader version 7 or later Click the paper clip icon lower left of the screen to display the Attach ments panel If the paper clip icon is not shown click View gt Navigation Panels gt Attachments Double click on the VPA Test Table xls file Click OK in the Launch Attachment dialog box The test spreadsheet opens in your spreadsheet application and shows the Blank Test Record spreadsheet tab Click File Save As to save the file to a name and location that you enter You can now use the spreadsheet to enter values for the vertical position accuracy test TDS1000B and TDS2000B Series Oscilloscope Service Manual A 1 Appendix A Example of a Vertical Position Accuracy Test Spreadsheet Example Filled in Vertical Position Accuracy Test Spreadsheet e F le Osc
91. scope Digitizing oscilloscope DC voltage source osseso soooo ee ee 20000 e odon S 00000 ce ODO O O 0 20008 o COCO 0 0 O Dual banana to BNC adapter 10 inch 10 inch BNC cables BNC cables 10 inch BNC cables Ln 10 inch 10 inch BNC cable BNC T connector BNC cable BNC connectors 10 inch cable T BNC T e _ _ _ __ 11 connector 10 inch BNC cable DC vol 2 volageaelup Two Channel Digitizing oscilloscope DC voltage source O 25005005 2 AS 0003 0 Dual banana to BNC adapter 1M BNC cable Sinewave generator setup Edge setup Two Channel Four Channel Leveled sine Digitizing oscilloscope Square wave Digitizing oscilloscope wave generator z generator 5922000 D00007 osoo0ooo Ob a Output o Output 001 50 Q feedthrough terminator 50 Q feedthrough terminator Table 5 2 and 5 3 list Table 5 2 and 5 3 list proper channel proper channel 1 MBNC cable 1 M BNC cable Figure 5 1 Adjustment setups 5 4 TDS1000B and TDS2000B Series Oscilloscope Service Manual Adjustment Procedures Adjustment Procedure Use this procedure to load new cali
92. shown in Figure 8 1 Table 8 5 Standard accessories Tektronix part number or Description of accessory nomenclature Passive 1X 10X probes P2220 Replacement user manual English 071 1817 XX French 071 1818 XX Italian 071 1819 XX German 071 1820 XX Spanish 071 1821 XX Japanese 071 1822 XX Portuguese 071 1823 XX Simplified Chinese 071 1824 XX Traditional Chinese 071 1825 XX Korean 071 1826 XX Russian 071 1827 XX Replacement power cords Option AO Std North American 120 V 60 Hz 161 0066 00 Option A1 European 230 V 50 Hz 161 0066 09 Option A2 United Kingdom 230 V 50 Hz 161 0066 10 Option A3 Australian 240 V 50 Hz 161 0066 11 Option A5 Switzerland 230 V 50 Hz 161 0154 00 Option A6 Japan 100 V 60 Hz 161 0298 00 Option A10 China 220 V 50 60 Hz 161 0304 00 Option A11 India 230 V 50 Hz 161 0400 00 Option A99 No power cord The PC Communications software that was on the CD that came with your oscilloscope is downloadable from the Web site at www tektronix com Table 8 6 Optional accessories Description of accessory Tektronix part number or nomenclature Replacement programmer manual 071 1075 XX Soft case AC2100 Transit case HCTEK4321 Rackmount Kit RM2000B Requires the soft case which fits inside 8 12 TDS1000B and TDS2000B Series Oscilloscope Service Manual Appendix AS AE Appendix A Example of a Vertical Position Accuracy Test Spreadsheet This appendix contains a filled in example of the ve
93. stants are stored in nonvolatile memory sections within the flash PROM The processor system shares DRAM with the display system TDS1000B and TDS2000B Series Oscilloscope Service Manual Theory of Operation Processing and Display The processing and display system consists of the display ASIC DRAM and System system oscillator Digitized acquisition samples are received by the display ASIC and stored in DRAM Once data are received by the display ASIC various corrections are applied display rasterization is performed and the waveform is placed into a display buffer At the same time the waveform is being read from the display buffers and written to the LCD Additional circuitry in the display ASIC supports scanning the front panel handling DRAM refresh providing the processor clock and performing various memory mapping tasks required by all elementary microprocessor based systems In a four channel system the two display ASICs are interconnected so that one ASIC may provide display information for the second The processing and display system handles some of the computational tasks Other tasks are performed by the processor system Since all array processing is performed in the processing and display system no computations can be performed that involve data from two different channel sets Thus subtracting channel 3 data from channel 2 is prohibited Channel 1 and Channel 2 data may be combined in all of the supported ways Input
94. test checks the time base accuracy Accuracy and Delay Time Accuracy 1 Set up the oscilloscope using the following steps Push menu button Select menu option Select setting DEFAULT SETUP CH 1 2 Connect the oscilloscope to the time mark generator as shown below Time mark Digitizing oscilloscope generator O 2000 5 O Output E 9 O 50 Q feedthrough BNC cable 3 Set the time mark generator period to 10 ms 4 Set the oscilloscope VOLTS DIV to 500 mV div 4 6 TDS1000B and TDS2000B Series Oscilloscope Service Manual Performance Verification Set the oscilloscope Main SEC DIV to 1 ms div Push SET TO 50 Use the vertical POSITION control to center the test signal on screen Use the horizontal POSITION control to set the position to 10 00 ms gt 2 A A I Set the oscilloscope SEC DIV to 250 ns div 10 Check that the rising edge of the marker crosses the center horizontal graticule line within 2 divisions of the vertical center graticule line Trig d M Pos 10 00ms Vertical center graticule line Horizontal center graticule line Acceptable limits NOTE One division of displacement from graticule center corresponds to a 25 ppm time base error 11 Disconnect the test setup TDS1000B and TDS2000B Series Oscilloscope Service Manual 4 7 Performance Verification Check Edge T
95. through Termination Dual Banana to BNC Adapter BNC T Adapter Splitter Power Adapter four required Adapter Leads 3 Black Leads 2 Red Minimum requirements 17 5 mV to 7 V 0 5 accuracy 50 kHz and 200 MHz 3 amplitude accuracy 10 ms period 10 ppm accuracy BNC male to BNC male 1m 36 in long BNC male to BNC male 25 cm 10 in long BNC male and female connectors Banana plugs to BNC female BNC male to dual BNC female connectors Frequency range DC to 4 GHz Tracking gt 2 0 Male N to female BNC Female N to male BNC Stacking Banana Plug Patch Cord 45 cm 18 in long Stacking Banana Plug Patch Cord 45 cm 18 in long TDS1000B and TDS2000B Series Oscilloscope Service Manual Examples Wavetek 9100 Universal Calibration System with Oscilloscope Calibration Module Option 250 Fluke 5500A Multi product Calibrator with Oscilloscope Calibration Option Option 5500A SC Tektronix part number 012 0482 XX Tektronix part number 012 0208 XX Tektronix part number 011 0049 XX Tektronix part number 103 0090 XX Tektronix part number 103 0030 XX Tektronix part number 015 0565 XX Tektronix part number 103 045 XX Tektronix part number 103 0058 XX Pomona B 18 0 Pomona B 18 2 4 1 Performance Verification Test Record Model Serial number number Procedure performed by Date Test Falleg 1 Self Test 2 Self Calibration DERI 3 Oscil
96. tional circuit block shown in Figures 3 1 and 3 2 Of necessity the descriptions for the two and four channel units and the color and monochrome units are slightly different TDS1000B and TDS2000B Series Oscilloscope Service Manual 3 1 Theory of Operation Power Supply AC Line AG Line In P3 Backlight P acklight Power EX DC xc Through e END ae chassis 99 a A1 Main 11 TDS1000B Mono Front Panel A TDS2000B Color GND V Display dm J101 P131 12 DC In gt lt L e Backlight E J2031 Probe Comp J201 00 902 Signal LCD AA Display Control 2032 18 Probe Comp GND J300 V CH1 Q e l J902 J350 lt amp PC or printer O e USB Device 1 y 4880 1 V J901 Your USB Flash drive DP Figure 3 1 Module level block diagram two channel 3 2 TDS1000B and TDS2000B Series Oscilloscope Service Manual Theory of Operation Power Supply AC Line 3 lt AC Line In P3 Backlight Power gt gt Through o amp Line 0 chassis Trigger A1 Main 11 P4
97. to support the front panel One of these lines resets the scan a second clocks the scan to the next position and the sense line receives the current state of the selected switch or encoder position For the encoders some amount of debouncing occurs inside the front panel IC All key debouncing is handled in the display ASIC on the main board The LEDs are controlled by latching the value of the Channel 1 2 front panel scan counter when the appropriate scan value is set TDS1000B and TDS2000B Series Oscilloscope Service Manual Theory of Operation Four Channel The front panel board of the four channel units is effectively two panels in Oscilloscopes parallel The left side of the board is largely handled by the display ASIC for channels 1 and 2 The right side of the board is handled by the channel 3 and 4 ASIC Separate front panel ICs support these data paths TDS1000B and TDS2000B Series Oscilloscope Service Manual 3 7 Theory of Operation 3 8 TDS1000B and TDS2000B Series Oscilloscope Service Manual ES AAA Performance Verification Required Equipment AAA a Performance Verification This chapter contains performance verification procedures for the specifications marked with the symbol The following equipment or a suitable equivalent is required to complete these procedures Description DC Voltage Source Leveled Sine Wave Generator Time Mark Generator 50 2 BNC Cable 50 2 BNC Cable 50 Q Feed
98. ture contrast setting and display type 2 Frequency may vary slightly with software version 3 With monochrome display cable attached If no cable is attached default condition is High color TDS1000B and TDS2000B Series Oscilloscope Service Manual 6 27 Maintenance 6 28 Troubleshooting the Backlight A 4 If all the signals are present the display module is probably defective Replace it 5 If all or some of the signals are missing turn off the oscilloscope and disconnect the display cable at J201 on the main board Carefully pull the cable straight up from the connector to avoid damage 6 Turn on the oscilloscope 7 Probe the pins of J201 checking for the same signals as in step 3 8 Ifany of the signals are missing the main board module is probably defective Replace it To troubleshoot a nonfunctional backlight follow these steps 1 Remove the rear case using the procedure Rear Case on page 6 9 2 Turnon the oscilloscope WARNING To avoid electrical shock do not touch the backlight connectors on the power supply module See Figure 6 8 for the location of the connectors Typically the monochrome connector is black and the color connector is white 3 Set the test oscilloscope with a 100X probe to measure 1270 Vpk pk 450 Vrms signal at approximately 50 kHz 4 Attach the probe ground lead to the ground lug on the AC line connector and the probe tip to one of the leads on the ba
99. ve Replace it The oscilloscope runs an extensive self diagnostic routine at every power on Running the diagnostics from the Service menu will provide no additional information and therefore is not needed The menu selections are only used during manufacturing of the oscilloscope Follow these steps to troubleshoot the input connections only if the oscilloscope appears to function normally in every way However you have determined that an input signal is not getting into the oscilloscope as expected 1 Remove the rear case using the procedure Rear Case on page 6 9 2 Check that the coaxial connections to the back side of the BNC connectors are intact Use the DMM to measure continuity from the front side of the BNC connector to the point where it attaches to the Main board TDS1000B and TDS2000B Series Oscilloscope Service Manual 6 33 Maintenance Troubleshooting the USB 6 34 Interface Using the Error Log NOTE The ground side of the BNC has three connections two mounting lugs and one signal wire while the center connection has one Incomplete or poor connection of the ground side may cause AC signal quality problems without affecting DC measurement capability 3 If no problem is found and the trouble persists the main board is probably defective in some way that the internal diagnostics cannot detect Replace it To troubleshoot the USB interface if the acquisition is working and the USB is not replac
100. ve Generator 50 Ohm 1 MHz 100 mVp p 73 Sinewave Generator 50 Ohm 1 MHz 1 Vp p 74 Sinewave Generator 50 Ohm 50 kHz 1 Vp p 75 Sinewave Generator 50 Ohm 20 MHz 1 Vp p 76 Sinewave Generator 50 Ohm BWL 25 mVp p 77 Sinewave Generator 50 Ohm BWL 50 mVp p 78 Sinewave Generator 50 Ohm BWL 100 79 Sinewave Generator 50 Ohm BWL 250 mVp p 80 Sinewave Generator 50 Ohm BWL 500 81 Sinewave Generator 50 Ohm BWL 1 Vp p 82 Sinewave Generator 50 Ohm 5 kHz 2 5 Vp p 83 Sinewave Generator 50 Ohm 1 MHz 2 5 Vp p 84 Sinewave Generator 50 Ohm 50 kHz 2 5 Vp p 85 Sinewave Generator 50 Ohm 20 MHz 2 5 Vp p 86 Sinewave Generator 50 Ohm BWL 2 5 Vp p 87 Sinewave Generator 50 Ohm BWL 5 Vp p 88 Sinewave Generator 50 Ohm BWL 1 6 Vp p 89 Edge 50 Ohm Refer to the Edge 1 kHz 0 to 800 mV setup diagram TDS1000B and TDS2000B Series Oscilloscope Service Manual Adjustment Procedures Table 5 2 Adjustment steps Cont Step number Step number Two channel Four channel models models Signal Signal source setting Input NA 90 Sinewave Generator 50 Ohm 5 kHz 1 Vp p CH4 91 Sinewave Generator 50 Ohm 1 MHz 100 mVp p 92 Sinewave Generator 50 Ohm 1 MHz 1 Vp p 93 Sinewave Generator 50 Ohm 50 kHz 1 Vp p 94 Sinewave Generator 50 Ohm 20 MHz 1 Vp p 95 Sinewave Generator 50 Ohm BWL 25 mVp p 96 Sinewave Generator 50 Ohm BWL 50 mV
101. ve the power button and rear case using the procedures on page 6 9 2 Remove the entire internal assembly from the front case using the procedure on page 6 12 3 Remove the switch keypad using the procedure on page 6 18 Installation To install the front case refer to Figure 8 1 for 2 channel models or Figure 8 2 for 4 channel models and follow these steps 1 Place the switch keypad into the front case 2 Place the entire internal assembly into the front case 3 Use the installation procedure for each module removed to reassemble the oscilloscope TDS1000B and TDS2000B Series Oscilloscope Service Manual 6 19 Maintenance Troubleshooting A Adjustment After Repair Required Tools and Equipment Troubleshooting Tree 6 20 This section contains information and procedures to help you isolate a defective module in the oscilloscope WARNING Before doing this or any other procedure in this manual read the General Safety Summary and Service Safety Summary found at the beginning of this manual Also to prevent possible injury or damage to electrical components read Preventing ESD on page 6 1 If you replace the main board or power supply you must adjust the oscilloscope after repair Refer to the chapter Adjustment Procedures You may need the the following tools and equipment to troubleshoot the oscilloscope Tools and equipment Oscilloscope with 1X 10X and 100X probes Example Tektronix TDS
102. xploded view illustrations that follow Use this part number when ordering replacement parts from Tektronix 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 indicates the part is good for all serial numbers 5 Qty This indicates the quantity of parts used 6 Name amp Description An item name is separated from the description by a colon Because of space limitations an item name may sometimes appear as incomplete Use the U S Federal Catalog handbook H6 1 for further item name identification Abbreviations Abbreviations conform to American National Standard ANSI Y1 1 1972 Exploded Views Figures 8 1 through 8 4 show the module level exploded views of the TDS1000B and TDS2000B oscilloscopes On the adjacent page is the list of components for that exploded view indexed by the numbers in the figure TDS1000B and TDS2000B Series Oscilloscope Service Manual 8 3 Replaceable Parts Table 8 1 Replaceable parts list 2 channel models Fig amp deis Tektronix part Serialno Serial no number number effective discontd Qty amp description 8 1 2 CHANNEL MODELS 1 650 4974 00 1 FRONT CASE ASSY COVER W FEET TDS1001B TDS1002B TDS1012B MONO 650 4975 00 1 FRONT CASE ASSY COVER W FEET TDS2002B TDS2012B TDS2022B COLOR 2 366 0863 00 1 ASSEMBLY KNOB 685 DIAMETER 3 366 0862 00 1 ASSEM
103. y It is capable of providing about 25 W of power for the oscilloscope while allowing the input to run from about 90 V to 264 V Input frequency ranges from 47 Hz to 440 Hz which allows operation in virtually all countries in the world and in a number of off grid environments such as power on military aircraft The secondary supplies from the power supply and the approximate current draws are listed in the table on page 6 25 with the associated connector pins on 1101 For information on voltages used in the oscilloscope refer to the Troubleshooting section of this manual The display module is a standard passive liquid crystal display LCD The monochrome unit is patterned with 320 columns by 240 rows and has the associated drivers and backlight The color unit is patterned with 320 columns x 3 sub columns by 240 rows and has the associated drivers and backlight In both displays the backlight tube is in a 5mA top lamp configuration You can manipulate all of the switches and position encoders on the front panel board of two 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 Additionally an IC on the front panel board provides buffering and multiplexing of switch signals to the main board Two signals and a sense line are provided by the main board

TDS1000B and TDS2000B Series Digital Storage Oscilloscopes

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