Page 1 T h e t e s t & me a s u r e me n t e q u i p me n t y o u n e e d a t t h e p r i c e y o u w a n t . A l l t e s t I n s t r u me n t s , I n c .
Page 2 Service Manual TDS1000B and TDS2000B Series Digital Storage Oscilloscopes 077-0356-00 *P077035600* 077035600...
Page 4 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...
Page 5 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.
Page 6: Table Of Contents
Table of Contents General Safety Summary ........Service Safety Summary .
Page 7 Table of Contents Maintenance ..........6- -1 Preventing ESD .
Page 8 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 test...
Page 9 Table of Contents List of Tables Table 1- -1: Oscilloscope specifications ......1- -1 Table 1- -2: Oscilloscope general specifications .
Page 10: General Safety Summary
General Safety Summary Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. To avoid potential hazards, use this product only as specified. Only qualified personnel should perform service procedures. To Avoid Fire or Use Proper Power Cord.
Page 11 General Safety Summary Provide Proper Ventilation. Refer to the manual’s installation instructions for details on installing the product so it has proper ventilation. Terms in this Manual These terms may appear in this manual: WARNING. Warning statements identify conditions or practices that could result in injury or loss of life.
Page 12: Service Safety Summary
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.
Page 13 Service Safety Summary viii TDS1000B and TDS2000B Series Oscilloscope Service Manual...
Page 14: Preface
Preface This service manual provides information to verify performance of, calibrate, troubleshoot, disassemble, and replace parts on the TDS1000B and TDS2000B Series Digital Storage Oscilloscopes. 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.
Page 15 Preface TDS1000B and TDS2000B Series Oscilloscope Service Manual...
Page 16: Specifications
Specifications...
Page 18: Table 1- 1: Oscilloscope Specifications
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: H The oscilloscope must have been operating continuously for twenty minutes within the specified operating temperature. H 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.
Page 19 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.
Page 20 Specifications Table 1- 1: Oscilloscope specifications (Cont.) Verticalw Digitizers 8-bit resolution (except when set to 2 mV/div), each channel sampled simultaneously VOLTS/DIV Range 2 mV/div to 5 V/div at input BNC 2 mV/div to 200 mV/div, ±2 V Position Range, typical >...
Page 21 Specifications Table 1- 1: Oscilloscope specifications (Cont.) Verticalw ±3% for Sample or Average acquisition mode, 5 V/div to 10 mV/div DC Gain Accuracy DC Gain Accuracy ±4% for Sample or Average acquisition mode, 5 mV/div and 2 mV/div ±(3% × reading + 0.05 div) Volts Measurement Delta volts between any two averages of ≥...
Page 22 Specifications Table 1- 1: Oscilloscope specifications Trigger Coupling Sensitivity TDS1001B, TDS1002B, TDS2022B, TDS2024B Trigger Sensitiv- TDS1012B, TDS2002B, ity, Edge Trigger TDS2004B, TDS2012B, Type, DC coupling, TDS2014B with a stable display of a trigger event 200 mV from DC to 100 MHz* 200 mV from DC to 100 MHz* 350 mV from 100 MHz to 200 MHz* EXT/5...
Page 23 Specifications Table 1- 1: Oscilloscope specifications (Cont.) Trigger Trigger Level Range, Source Range typical ±8 divisions from center of screen CH1, CH2, CH3, CH4 ±1.6 V ±8 V EXT/5 AC Line Can not be set Accuracies are for signals having rise and fall times ≥ 20 ns Trigger Level Accura- cy, typical Source...
Page 24 Specifications Table 1- 1: Oscilloscope specifications (Cont.) Pulse Width trigger Pulse Width Range Selectable from 33 ns to 10 s Pulse Width 16.5 ns or 1 part per thousand, whichever is larger Resolution t > 330 ns: ±5% ≤ guardband < ±(5.1% + 16.5 ns) Equal Guardband t ≤...
Page 25: Table 1- 2: Oscilloscope General Specifications
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 y, yp Monochrome display Color display 75 cd/m 65 cd/m Probe compensator output 5 V into ≥...
Page 26 Specifications Table 1- 2: (Cont.) Oscilloscope general specifications Mechanical Size Height 158 mm (6.220 in) Width 326.3 mm (12.845 in) Depth 124.1 mm (4.885 in) Weight (approximate) Instrument only 2.0 kg (4.375 lbs) Adjustable through the Display menu. As defined in IEC 61010- - 1:2001. 1- 9 TDS1000B and TDS2000B Series Oscilloscope Service Manual...
Page 27 Specifications 1- 10 TDS1000B and TDS2000B Series Oscilloscope Service Manual...
Page 28: Operating Information
Operating Information...
Page 30 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. 2- 1 TDS1000B and TDS2000B Series Oscilloscope Service Manual...
Page 31 Operating Information 2- 2 TDS1000B and TDS2000B Series Oscilloscope Service Manual...
Page 32: Theory Of Operation
Theory of Operation...
Page 34 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 functional 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.
Page 35: Figure 3- -1: Module-Level Block Diagram (Two Channel)
Theory of Operation Power Supply AC Line In AC Line Backlight Power DC Out & Line Through Trigger chassis A1 Main TDS1000B (Mono) Front Panel TDS2000B (Color) Display J101 P131 J202 DC In Backlight P/O J2031 (Color) (Mono) J201 J902 Probe Comp Signal Display Control...
Page 36: Figure 3- -2: Module-Level Block Diagram (Four Channel)
Theory of Operation Power Supply AC Line In AC Line Backlight Power DC Out Through & Line chassis Trigger A1 Main Front Panel Color Display J101 DC In J202 Backlight J201 J902 J104 P/O J2031 Probe Comp Display Control Signal 18 Pins J104 P/O J2032 Probe Comp...
Page 37: Main Board
Theory of Operation Main Board 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.
Page 38: Input Signal Interface
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.
Page 39: Power Supply
Theory of Operation Power Supply The main power supply module for the TDS1000B and TDS2000B series oscilloscopes is a wide input range universal supply. 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.
Page 40: Four-Channel Oscilloscopes
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.
Page 41 Theory of Operation 3- - 8 TDS1000B and TDS2000B Series Oscilloscope Service Manual...
Page 42: Performance Verification
Performance Verification...
Page 44: Required Equipment
Time Mark Generator Calibration Option (Option accuracy 5500A-SC) 50 Ω BNC Cable BNC male to BNC male, Tektronix part number ≈ 1 m (36 in) long 012-0482-XX 50 Ω BNC Cable BNC male to BNC male, Tektronix part number ≈ 25 cm (10 in) long 012-0208-XX 50 Ω...
Page 45: Test Record
Performance Verification Test Record Model Serial number number Procedure performed by Date Test Passed Failed 1. Self Test 2. Self Calibration 3. Oscilloscope tests Oscilloscope tests Low limit Test result High limit Channel 1 DC Gain Accuracy 5 mV/div 33.6 mV 36.4 mV 200 mV/div 1.358 V...
Page 46 Performance Verification Oscilloscope tests Low limit Test result High limit Channel 1 Vertical Position Accuracy, Minimum margin — Channel 2 Vertical Position Accuracy, Minimum margin — Channel 3 Vertical Position Accuracy , Minimum margin — Channel 4 Vertical Position Accuracy , Minimum margin —...
Page 47: Check Dc Gain Accuracy
Performance Verification 3. Verify that self calibration passed. Check DC Gain Accuracy This test checks the DC gain accuracy of all input channels. 1. Set the DC voltage source output level to 0 V. 2. Set up the oscilloscope using the following steps: Push menu button Select menu option Select setting...
Page 48: Check Bandwidth
Performance Verification VOLTS/DIV setting DC voltage source output levels Accuracy limits for V diff 5 mV/div +17.5 mV, - - 17.5 mV 33.6 mV to 36.4 mV 200 mV/div +700 mV, - - 700 mV 1.358 V to 1.442 V 2 V/div +7.00 V, - - 7.00 V 13.58 V to 14.42 V...
Page 49: Check Sample Rate Accuracy And Delay Time Accuracy
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: H 40 MHz if you are checking a TDS1001B H 60 MHz if you are checking a TDS1002B, TDS2002B, or TDS2004B H 100 MHz if you are checking a TDS1012B, TDS2012B, or TDS2014B...
Page 50 Performance Verification 5. Set the oscilloscope Main SEC/DIV to 1 ms/div. 6. Push SET TO 50%. 7. Use the vertical POSITION control to center the test signal on screen. 8. Use the horizontal POSITION control to set the position to 10.00 ms. 9.
Page 51: Check Edge Trigger Sensitivity
Performance Verification Check Edge Trigger This test checks the edge trigger sensitivity for all input channels. Sensitivity 1. Set up the oscilloscope using the following steps: Push menu button Select menu option Select setting DEFAULT SETUP — — CH 1 Probe TRIGGER Mode...
Page 52 Performance Verification H 100 MHz if you are checking a TDS1012B, TDS2012B, TDS2014B, TDS2022B, or TDS2024B 9. Set the oscilloscope SEC/DIV to 5 ns/div. 10. Set the leveled sine wave generator output level to approximately 750 mV so that the measured amplitude is approximately 750 mV. (The measured amplitude can fluctuate around 750 mV.) 11.
Page 53 Performance Verification 2. Connect the oscilloscope to the leveled sine wave generator as shown below using CH 1 and EXT TRIG. Leveled sine Digitizing oscilloscope wave generator EXT TRIG Output 50 Ω Power divider Male SMA to feedthrough female BNC terminator 3 Pieces SMA female- -...
Page 54: Check Vertical Position Accuracy
Performance Verification 12. Set the oscilloscope SEC/DIV to 2.5 ns/div. 13. Push SET TO 50%. Adjust TRIGGER LEVEL as 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 TRIGGER Slope...
Page 55 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.
Page 56 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 Voltmeter Power supply Positive 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.
Page 57: Figure 4- -1: Example Of A Line Graph For The Vertical Position Accuracy
Performance Verification Measured Error Error Lower limit Upper limit Measured Position Figure 4- 1: Example of a line graph for the Vertical Position Accuracy test 4- 14 TDS1000B and TDS2000B Series Oscilloscope Service Manual...
Page 58: Adjustment Procedures
Adjustment Procedures...
Page 60: Required Equipment
Calibration Option (Option 5500A-SC) 50 Ω BNC Cable BNC male to BNC male, Tektronix part number 012-0482-XX ≈ 1 m (36 in) long 50 Ω BNC Cable (seven) BNC male to BNC male, Tektronix part number 012-0208-XX ≈ 25 cm (10 in) long 50 Ω...
Page 61: Adjustment Procedure
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 Adjustment Procedure The adjustment procedure consists of 70 steps for the two-channel oscilloscope, and 106 steps for the four-channel model.
Page 62 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.”...
Page 63: Figure 5- -1: Adjustment Setups
Adjustment Procedures DC voltage setup 1 Two Channel Four Channel Digitizing oscilloscope Digitizing oscilloscope DC voltage source Dual banana to BNC adapter 10-inch 10-inch 10-inch BNC cables BNC cables BNC cables 10-inch BNC ‘T’ 10-inch BNC cable BNC cable BNC ‘T’ connector connectors 10-inch BNC cable BNC ‘T’...
Page 64: Adjustment Procedure
Adjustment Procedures Adjustment Procedure Use this procedure to load new calibration constants. 1. Enable the Service menu as described on page 5- -2. 2. Push the Service option button. 3. Push the Factory Cal option button. 4. Push the Warmup Timer option button. 5.
Page 65: Table 5- -2: Adjustment Steps
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 CH1 through DC Voltage 1 0.0 V DC Voltage 1 --20.0 V DC Voltage 1 --2.0 V DC Voltage 1...
Page 66 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 DC Voltage 2 --5.0 V EXT TRIG DC Voltage 2 --1.0 V DC Voltage 2 1.0 V...
Page 67 Adjustment Procedures Table 5- - 2: Adjustment steps (Cont.) Step number Step number (Two-channel (Four-channel models) models) Signal Signal source setting Input Sinewave Generator, 50 Ohm 5 kHz, 1 V Sinewave Generator, 50 Ohm 1 MHz, 100 mV Sinewave Generator, 50 Ohm 1 MHz, 1 V Sinewave Generator, 50 Ohm 50 kHz, 1 V...
Page 68 Adjustment Procedures Table 5- - 2: Adjustment steps (Cont.) Step number Step number (Two-channel (Four-channel models) models) Signal Signal source setting Input Sinewave Generator, 50 Ohm 5 kHz, 1 V Sinewave Generator, 50 Ohm 1 MHz, 100 mV Sinewave Generator, 50 Ohm 1 MHz, 1 V Sinewave Generator, 50 Ohm 50 kHz, 1 V...
Page 69 Adjustment Procedures Table 5- - 2: Adjustment steps (Cont.) Step number Step number (Two-channel (Four-channel models) models) Signal Signal source setting Input Sinewave Generator, 50 Ohm 5 kHz, 1 V Sinewave Generator, 50 Ohm 1 MHz, 100 mV Sinewave Generator, 50 Ohm 1 MHz, 1 V Sinewave Generator, 50 Ohm 50 kHz, 1 V...
Page 70: Maintenance
Maintenance...
Page 72: Preventing Esd
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.
Page 73: Inspection And Cleaning
Maintenance Inspection and Cleaning Inspection and cleaning are done as preventive maintenance. Preventive maintenance, when done regularly, may prevent oscilloscope malfunction and enhance its reliability. Preventive maintenance consists of visually inspecting and cleaning the oscilloscope, and using general care when operating it. How often you do maintenance depends on the severity of the environment in which you use the oscilloscope.
Page 74: Table 6- -1: External Inspection Check List
Use a 75% isopropyl alcohol solution as a cleaner and rinse with deionized water. 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.
Page 75: Table 6- -2: Internal Inspection Check List
Maintenance Interior Inspection 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.
Page 76 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. If steps 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.
Page 77: Removal And Installation Procedures
Maintenance Removal and Installation Procedures 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. List of Modules The Replaceable Parts List provides a list of all replaceable modules.
Page 78: Power Button
Maintenance Power button Rear case Front Case assembly Rear foot Front flip foot Front foot Figure 6- - 1: Locator for trim and cabinet removal Power supply Display assembly assembly Main board assembly Chassis assembly Switch keypad Front panel assembly Figure 6- - 2: Locator for internal modules 6- - 7 TDS1000B and TDS2000B Series Oscilloscope Service Manual...
Page 79 Maintenance Required Tools Use the following tools to remove and replace all modules in the oscilloscope: H Torque-limiting screwdriver, long shank, 12 in-lb (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 H Torque-limiting screwdriver with Torx T- -8 bit H 5/8 inch deep socket with wide center hole (S...
Page 80 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.
Page 81 Maintenance 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: H All of the edges align with the front case. H The Li- -ION battery is vertical in the battery location.
Page 82: Power Supply Module
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.
Page 83: Internal Assembly
Maintenance Internal Assembly 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: 1. Remove the front-panel knobs, power button, and rear case using the procedures on page 6- -9.
Page 84 Maintenance 5. Remove the display. 6. Disconnect the display cable on the display module. 7. Thread the cable 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.
Page 85: Front-Panel Cable
Maintenance 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. Front-Panel Cable You will need a torque-limiting Torx T-15 screwdriver and pliers for this procedure.
Page 86: Main Board Module
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.
Page 87 Maintenance 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.
Page 88 Maintenance 5. For monochrome displays, remove the four screws attaching the display module to the internal assembly. 6. 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 power supply module to access the screws at the other end of the post.
Page 89: Front-Panel Module
Maintenance Front-Panel Module 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.
Page 90 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.
Page 91: Troubleshooting
(P2220) and optional 100X probe (P5100 or P5200) 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: 174-4401-00, .91 meters (3 feet) 174-5194-00, 1.83 meters (6 feet)
Page 92: Figure 6- -4: Oscilloscope Troubleshooting Tree (1
Maintenance Turn on power From Figure 6-6 Does screen To Figure 6-6 lighten? boot up screen? Put scope or frequency counter on probe comp Errors? To Figure 6-5 Replace main 1 kHz? board Front panel problems? To Figure 6-5 Verify LCD connector and cable values Run probe check...
Page 93: Figure 6- -5: Oscilloscope Troubleshooting Tree (2
Maintenance From Figure 6-4 Check cabling to main board. Verify power Able to run Replace cable; supply voltages front panel From Figure 6-4 front panel or main tests? board Power Disconnect supplies OK? power supply Run front panel tests in service menu Verify power Replace main...
Page 94: Figure 6- -6: Oscilloscope Troubleshooting Tree (3
Maintenance To Figure 6-4 Attach power Power cord From Figure 6-4 cord attached? Open case Reinstall case Replace power Fuse OK? supply Attach backlight Backlight cable cable attached? Using a high voltage 100X probe test voltages on backlight connectors ~50 kHz Replace display >700 V pk--pk...
Page 95: Figure 6- -7: Oscilloscope Troubleshooting Tree (4
Maintenance Install a compatible From Figure 6-4 USB flash drive in the front--panel port Does the Replace the flash drive Main board blink?* Examine the contents of the flash drive through the file controls Does the data match what is visible on the Check that the TekVISA software...
Page 96: Troubleshooting Tree
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, at a 1 kHz frequency. Use the oscilloscope and set the Attenuation switch to 10X on the P2220 probe to probe this output.
Page 97: Troubleshooting The Display
Maintenance Maximum J101 J101 current power return Derived draw pins pins supplies Supply Voltage range* , ∼50 kHz Backlight >500 V pk-pk (mono- chrome or color) With 3 W minimum load; still functions with no load. 3. If all of the voltages are present, the main board is probably defective. Replace it.
Page 98 Maintenance Signal at J201 Description, Monochrome Description, Color Pin 1 (marked No fixed pattern. Depends upon No fixed pattern. Depends upon with display data. display data. Pin 2 No fixed pattern. Depends upon No fixed pattern. Depends upon display data. display data.
Page 99: Troubleshooting The Backlight
Maintenance 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.
Page 100: Figure 6- -8: Measuring The Backlight Voltage
Maintenance AC ground lug Backlight voltage test points Figure 6- - 8: Measuring the backlight voltage 6. Add the results of both readings. If a signal greater than 1400 V pk-pk present, the backlight is probably defective. Replace the display. If the signal is not present, proceed with step 7.
Page 101: Troubleshooting The Front Panel
Maintenance Troubleshooting the Front To troubleshoot an improperly functioning front panel, follow these steps: Panel 1. 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.
Page 102 Maintenance Menu Comments Warmup Timer Ensures a ten-minute warm-up time for the oscilloscope before executing the calibration procedure. Stop Test Exits the front-panel test (Test FP) and the screen test (Test Screen). 5. Select Test FP to start the front-panel controls test. 6.
Page 103: Troubleshooting The Main Board
Maintenance Signal at J202 (2-channel models) or J1 (4-channel models) Description 8 FPTHERMGND_P Temp Sense Return Ground. 9 GND 0 V (ground) 10 FPDATA_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. 11 FPCLR_34_P Front Panel Clock line B 405 kHz.
Page 104: Running Diagnostics
Maintenance 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 J101 J101 current power return Derived draw pins pins...
Page 105: Troubleshooting The Usb Interface
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...
Page 106 Maintenance Clearing the Error Log. To 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.
Page 107: Repackaging Instructions
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: H The owner address...
Page 108: Diagrams
Diagrams...
Page 110 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.
Page 111: Figure 7- -1: Tds1000B And Tds2000B Series Block Diagram
Diagrams Front Display Power supply panel CH 1 Acq 1 Amp 1 Processor and Acquisition Amplifier Display -- A ASIC--A ASIC--A Acq 2 Amp 2 CH 2 Trigger Amp E Amplifier ASIC--B Main Board interface Power CH 3 Acq 1 Amp 1 Acquisition Processor and...
Page 112: Replaceable Parts
Replaceable Parts...
Page 114: Parts Ordering Information
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.
Page 115 Replaceable Parts Part Number Revision Tektronix part numbers contain two digits that show the revision level of the part. Level For some parts in this manual, you will find the letters XX in place of the revision level number. Part Number Revision Level...
Page 116: Using The Replaceable Parts List
Items in this section are referenced by figure and index numbers to the exploded view illustrations that follow. Tektronix Part Number Use this part number when ordering replacement parts from Tektronix. 3 and 4 Serial Number Column three indicates the serial number at which the part was first effective. Column four indicates the serial number at which the part was discontinued.
Page 117: Table 8- -1: Replaceable Parts List, 2-Channel Models
Replaceable Parts Table 8- - 1: Replaceable parts list, 2-channel models Fig. & index Tektronix part Serial no. Serial no. number number effective discont’d Name & description 8--1 2-CHANNEL MODELS 650--4974--00 FRONT CASE ASSY; COVER,W/FEET;TDS1001B,TDS1002B,TDS1012B;MONO 650--4975--00 FRONT CASE ASSY; COVER,W/FEET;TDS2002B,TDS2012B,TDS2022B;COLOR 366--0863--00 ASSEMBLY, KNOB;...
Page 118: Figure 8- -1: Exploded Diagram, 2-Channel Models
Replaceable Parts Figure 8- - 1: Exploded diagram, 2-channel models 8- - 5 TDS1000B and TDS2000B Series Oscilloscope Service Manual...
Page 119: Table 8- -2: Replaceable Parts List, 4-Channel Models
Replaceable Parts Table 8- - 2: Replaceable parts list, 4-channel models Fig. & index Tektronix part Serial no. Serial no. number number effective discont’d Name & description 8--2 4-CHANNEL MODELS 650--4976--00 FRONT CASE ASSY; COVER,W/FEET;TDS2004B,TDS2014B,TDS2024B;COLOR 366--0863--00 ASSEMBLY, KNOB; .685 DIAMETER 366--0862--00 ASSEMBLY, KNOB;...
Page 120: Figure 8- -2: Exploded Diagram, 4-Channel Models
Replaceable Parts Figure 8- - 2: Exploded diagram, 4-channel models 8- - 7 TDS1000B and TDS2000B Series Oscilloscope Service Manual...
Page 121: Table 8- -3: Replaceable Parts List, Power Supply Module, Cables, And Wires
Replaceable Parts Table 8- - 3: Replaceable parts list, power supply module, cables, and wires Fig. & index Tektronix part Serial no. Serial no. number number effective discont’d Name & description 8--3 POWER SUPPLY, CABLES, WIRES 119--7228--00 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 &...
Page 122: Figure 8- -3: Exploded Diagram, Power Supply Module, Cables And Wires
Replaceable Parts J400 Main channel assembly J201 J101 Front panel cable Display cable Power supply Chassis cable assembly Power supply module Power supply ground wire Chassis ground lug Front panel Backlight cable assembly Display assembly Figure 8- - 3: Exploded diagram, power supply module, cables and wires 8- - 9 TDS1000B and TDS2000B Series Oscilloscope Service Manual...
Page 123: Table 8- -4: Replaceable Parts List, Back Case And Trim
Replaceable Parts Table 8- - 4: Replaceable parts list, back case and trim Fig. & index Tektronix part Serial no. Serial no. number number effective discont’d Name & description 8--4 BACK CASE, TRIM 650--4973--00 REAR CASE ASSY; COVER,W/FEET & HANDLE;TDS1000B,TDS2000B SERIES 348--1703--00 FOOT;...
Page 124: Figure 8- -4: Exploded Diagram, Back Case And Trim
Replaceable Parts Removing the rear feet Bottom view To remove or install foot, squeeze at notches and swing one hinge free of slot or into place Chassis assembly Hinge Bottom view Use care to avoid touching the electrical contacts Keypad Figure 8- - 4: Exploded diagram, back case and trim 8- - 11 TDS1000B and TDS2000B Series Oscilloscope Service Manual...
Page 125: Table 8- -5: Standard Accessories
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...
Page 126 Appendix...
Page 128: Appendix A: Example Of A Vertical Position Accuracy Test Spreadsheet
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).
Page 129 Appendix A: Example of a Vertical Position Accuracy Test Spreadsheet Example Filled-in Vertical Position Accuracy Test Spreadsheet Approxi- Oscilloscope mate Test Measured Measured Lower Upper Voltage Voltage Voltage Limit Limit Error Margin 2.00 0.000 * Volts/div 0.05 1.96 0.000 1.92 0.000 * Offset as a fractional division...
Page 130 Appendix A: Example of a Vertical Position Accuracy Test Spreadsheet 0.80 0.805 - - 0.005 - - 0.018 0.018 0.013 0.76 0.76 0.764 - - 0.004 - - 0.0176 0.0176 0.014 0.72 0.72 0.724 - - 0.004 - - 0.0172 0.0172 0.013 0.68...
Page 131 Appendix A: Example of a Vertical Position Accuracy Test Spreadsheet - - 0.56 - - 0.56 - - 0.552 - - 0.008 - - 0.0156 0.0156 0.008 - - 0.6 - - 0.6 - - 0.592 - - 0.008 - - 0.016 0.016 0.008 - - 0.64...
Page 132 Appendix A: Example of a Vertical Position Accuracy Test Spreadsheet - - 1.92 - - 1.96 - - 2.00 These test values are outside of the range in the specification. A- 5 TDS1000B and TDS2000B Series Oscilloscope Service Manual...
Page 133 Appendix A: Example of a Vertical Position Accuracy Test Spreadsheet A- 6 TDS1000B and TDS2000B Series Oscilloscope Service Manual...
Page 134: Index
Index...
Page 136 Index acquisition module, troubleshooting, 6- - 32 front panel, description acquisition system, description, 3- - 4 2 channel models, 3- - 6 adjustment procedure, 5- - 5 4 channel models, 3- - 7 description, 5- - 2 front- - panel module, troubleshooting, 6- - 30 adjustment procedures, setups, 5- - 4 input signal interface, description, 3- - 5 backlight, troubleshooting, 6- - 28...
Page 137 Index troubleshooting, 6- - 25 preventive maintenance, 6- - 2 Probe Comp output, troubleshooting, 6- - 25 sample rate and delay time accuracy test, 4- - 6 probe compensation, description, 3- - 5 self calibration, 4- - 3 procedures specifications, 1- - 1 inspection and cleaning, 6- - 2–6- - 5 storage, 6- - 36 interior cleaning, 6- - 4...

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