Tektronix DPO2000 Series Service Manual

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DPO2000 and MSO2000 Series Oscilloscopes

ZZZ

Service Manual

*P071233100*

071-2331-00

www.valuetronics.com

Table of Contents

Troubleshooting

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Page 1 DPO2000 and MSO2000 Series Oscilloscopes Service Manual *P071233100* 071-2331-00 www.valuetronics.com...
Page 2 www.valuetronics.com...
Page 3 DPO2000 and MSO2000 Series Oscilloscopes Service Manual www.tektronix.com 071-2331-00 www.valuetronics.com...
Page 4: Contacting Tektronix
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 supersedes that in all previously published material.
Page 5: Table Of Contents
Table of Contents General Safety Summary ..................Service Safety Summary..................Preface ......................Manual Conventions..................Related Documentation ..................Operating Information Operating Information ................... Theory of Operation Theory of Operation....................Block Diagram ....................Power Supply....................Front End Assembly..................Main Board ....................Front-Panel Board ................... Adjustment Procedures Adjustment Procedures ..................
Page 6 Table of Contents Replaceable Parts List Replaceable Parts List.................... Parts Ordering Information ................. Using the Replaceable Parts List................DPO2000 and MSO2000 Series Service Manual www.valuetronics.com...
Page 7 List of Figures Figure 2-1: Oscilloscope module interconnections ............Figure 4-1: Locator for internal modules ..............Figure 4-2: Primary troubleshooting procedure............. 4-13 Figure 4-3: AC power supply troubleshooting procedure ..........4-14 Figure 4-4: Module isolation troubleshooting procedure ..........4-15 Figure 5-1: Front trim.................... Figure 5-2: Rear trim.....................
Page 8 Table of Contents List of Tables Table i: Related documentation .................. Table 4-1: External inspection check list ..............Table 4-2: Internal inspection check list ............... Table 5-1: Front trim ..................... Table 5-2: Rear trim....................Table 5-3: Rear case....................Table 5-4: Power supply ..................Table 5-5: Rear chassis ..................
Page 9: General Safety Summary
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 Personal Use Proper Power Cord.
Page 10 General Safety Summary 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. CAUTION. Caution statements identify conditions or practices that could result in damage to this product or other property.
Page 11: Service Safety Summary
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 12 Service Safety Summary viii DPO2000 and MSO2000 Series Service Manual www.valuetronics.com...
Page 13: Preface
Preface This service manual provides information that you need to troubleshoot, disassemble, and replace parts on the Tektronix DPO2000 and MSO2000 Series Oscilloscopes. 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.
Page 14 Preface DPO2000 and MSO2000 Series Service Manual www.valuetronics.com...
Page 15: Operating Information
Operating Information www.valuetronics.com...
Page 16 www.valuetronics.com...
Page 17 For information on installing and operating your DPO2000 or your MSO2000 Series Oscilloscope, refer to the DPO2000 and MSO2000 Series Oscilloscopes User Manual. The User manual is available, in 11 languages, on the Web at www.tektronix.com. DPO2000 and MSO2000 Series Service Manual 1–1...
Page 18 Operating Information 1–2 DPO2000 and MSO2000 Series Service Manual www.valuetronics.com...
Page 19: Theory Of Operation
Theory of Operation www.valuetronics.com...
Page 20 www.valuetronics.com...
Page 21: Block Diagram
Theory of Operation This chapter describes the electrical operation of the oscilloscope to the module level. Figure 2-1 shows the oscilloscope module interconnections. Block Diagram Figure 2-1: Oscilloscope module interconnections Power Supply The Power Supply board converts AC line voltage to +3.3 V, +5 V, –5 V, and +13 V to power all internal circuits.
Page 22: Main Board
Theory of Operation Main Board The Main board module contains the following functions: The Acquisition system begins by accepting the differential mode channel signals Acquisition System from the Front End assembly, which are routed to the A/D inputs, and ends with a digitized signal in memory.
Page 23: Adjustment Procedures
Adjustment Procedures www.valuetronics.com...
Page 24 www.valuetronics.com...
Page 25: Required Equipment
Adjustment Procedures This chapter contains the factory adjustment procedure for the DPO2000 Series and the MSO2000 Series oscilloscopes. Only qualiﬁed personnel should perform adjustment procedures. Read the Service Safety Summary and the General Safety Summary before performing any service procedures.
Page 26: Overview Of The Adjustment Process
1 kHz with < 50 ps ch-ch Output Module skew 50 Ω BNC cable BNC male to BNC male, Tektronix part number 012-0208-00 about 10 in (25 cm) long Overview of the Adjustment Process Before performing adjustment procedures, you must warm up the oscilloscope for at least 20 minutes in an ambient temperature between 20 °C and 30 °C.
Page 27: Factory Adjustment Procedure
Adjustment Procedures Factory Adjustment Procedure To perform the factory adjustment procedure, complete these steps: 1. Connect the oscilloscope to an AC power source. NOTE. You must connect the oscilloscope and the test equipment to the same AC power circuit. Connect the oscilloscope and test instruments to a common power strip if you are unsure of the AC power circuit distribution.
Page 28 Adjustment Procedures c. While the dialog window is open, press and hold the top side-bezel button (below the Waveform Only button) for approximately ﬁve seconds. The Factory Adjustment description and menu will appear, as shown here. d. Push the OK Do Factory Adjustment side-bezel button to start the adjustment process.
Page 29: Completing The Procedure
Adjustment Procedures Signal type Example prompt Refer to Parameters to set Apply 0 V DC 50 Ω DC Voltage (See page 3-6.) Waveform termination signal type, voltage, to 3. termination, channel Sine Signal Apply 2.0 V Pk-Pk (See page 3-7.) Waveform type, 1 MHz 50 Ω...
Page 30 Adjustment Procedures DC Voltage The DC Voltage test is the ﬁrst test to appear on the prompts, and it usually makes up the majority of the calibration procedure tests. For each DC Voltage test, complete all 8 steps listed below to best ensure that the test will pass. 1.
Page 31 Adjustment Procedures Sine Signal When a Sine Signal prompt appears, complete the following steps: 1. Push the Sine front panel button. 2. To ensure that the voltage is in direct mode, push the lower-bezel button and select 1.0. 3. Push the CHANNEL SELECT lower-bezel button, and then ensure that Channel 5 is selected.
Page 32: Troubleshooting
Adjustment Procedures Troubleshooting Refer to the following table for common issues encountered during the calibration procedure. Problem Things to try The instrument fails a test Are the channels hooked up properly, routed to the right channels, and turned on Is the signal set to the correct waveform, frequency, and termination (if applicable to the test) Is the output set to ON (the red light will be illuminated)
Page 33: Maintenance
Maintenance www.valuetronics.com...
Page 34 www.valuetronics.com...
Page 35: Preventing Esd
This section 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 36: Interior Cleaning
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. Lubrication. There is no periodic lubrication required for this oscilloscope.
Page 37: Exterior Inspection
Maintenance Exterior Inspection Inspect the outside of the oscilloscope for damage, wear, and missing parts, using the following table as a guide. Immediately repair defects that could cause personal injury or lead to further damage to the oscilloscope. Table 4-1: External inspection check list Item Inspect for Repair action...
Page 38: Table 4-2: Internal Inspection Check List
Maintenance Table 4-2: Internal inspection check list Item Inspect for Repair action Circuit boards Loose, broken, or corroded Remove and replace solder connections. damaged circuit board. Burned circuit boards. Burned, broken, or cracked circuit-run plating. Resistors Burned, cracked, broken, Remove and replace blistered condition.
Page 39: Overview Of Removal Procedures
Maintenance Overview of Removal Procedures Refer to the Trim, Cabinet, and Module Removal 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 for instructions. List of Modules The Replaceable Parts List chapter provides a list of all replaceable modules.
Page 40: Removal Procedures
Maintenance Figure 4-1: Locator for internal modules Removal Procedures Refer to the Exploded Views and/or the Internal Module locator before you follow any removal procedures for any modules. These procedures require that you have access to the module that you are removing. Unless directed otherwise, replacement is the reverse of removal.
Page 41 Maintenance Rear Case Follow these steps to remove the Rear Case assembly. Use a TORX T15 screwdriver tip. (See Figure 5-3.) 1. Remove the four screws from the back of the Rear Case assembly. When reinstalling, tighten these screws to 8 in/lb. 2.
Page 42 Maintenance NOTE. Do not remove the fan from the rear chassis unless you are replacing the fan. Follow these steps to remove the fan. You need to have previously removed the Rear Case assembly and the rear chassis. (See Figure 5-6.) 1.
Page 43 Maintenance Front Chassis Follow these steps to remove the Front Chassis. You must have previously removed the rear case assembly and the rear chassis. (See Figure 5-9.) 1. Remove the seven T15 screws that connect the front chassis to the front panel assembly.
Page 44 Maintenance 3. Remove the 12 T15 screws that attach the Front Panel board to the front frame. Note that ﬁve of these screws have ground clips. Make sure to place the ground clips on the correct screws when reinstalling. Note the ground clip detail in Figure 5-11.
Page 45 Maintenance 1. Remove the two ﬂat-head Phillips screws from the back side of the Front Panel assembly. These screws go completely through the guides on both sides of the circuit board. 2. Turn the Front Panel assembly over and remove the two ﬂat-head Phillips screws from the front side of the Front Panel assembly.
Page 46: Troubleshooting
Maintenance Troubleshooting This section contains information and procedures to help you isolate a defective module in the DPO2000 series or the MSO2000 series oscilloscopes. 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.
Page 47: Troubleshooting Procedure
Maintenance Troubleshooting Procedure The following ﬁgures are troubleshooting procedure ﬂowcharts. Use them to troubleshoot an instrument failure. WARNING. Before removing the rear case, disconnect the power cord from the line voltage source. Failure to do so could cause serious injury or death. Figure 4-2: Primary troubleshooting procedure DPO2000 and MSO2000 Series Service Manual 4–13...
Page 48: Figure 4-3: Ac Power Supply Troubleshooting Procedure
Maintenance Figure 4-3: AC power supply troubleshooting procedure 4–14 DPO2000 and MSO2000 Series Service Manual www.valuetronics.com...
Page 49: Unpacking And Repacking Instructions
The oscilloscope and its standard accessories are carefully packed at the factory in a shipping carton. If, upon receipt, damage to the shipping carton is evident, notify the shipper. Tektronix, Inc. is not responsible for damage caused during shipping. DPO2000 and MSO2000 Series Service Manual 4–15...
Page 50 A complete description of the service required Seal the shipping carton with an industrial stapler or strapping tape. Mark the address of the Tektronix Service Center and also your own return address on the shipping carton in two prominent locations. See www.tektronix.com/service to ﬁnd a service center near you.
Page 51: Replaceable Parts List
Replaceable Parts List www.valuetronics.com...
Page 52 www.valuetronics.com...
Page 53: Parts Ordering Information
Level revision level number. 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.
Page 54: Using The Replaceable Parts List
Items in this section are referenced by ﬁgure and index numbers to the exploded view illustrations that precede the list. 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 55: Figure 5-1: Front Trim
Replaceable Parts List Table 5-1: Front trim Fig. & index Tektronix part Serial no. Serial no. number number effective discont’d Name & description Front trim 366-0863-00 ASSEMBLY, KNOB; .685 DIAMETER 366-0862-00 ASSEMBLY, KNOB; .470 DIAMETER 366-0877-00 KNOB; LARGE, WSP, JOG, SHUTTLE, FSN.ASM...
Page 56: Figure 5-2: Rear Trim
Replaceable Parts List Table 5-2: Rear trim Fig. & index Tektronix part Serial no. Serial no. number number effective discont’d Name & description Rear trim 650-5016-00 REAR CASE SUB ASSEMBLY; MSO/DPO2000 **ATTACHED PARTS** 348-1910-00 FOOT, FRONT CABINET, HINGED 214-5148-00 SPRING FRONT FOOT...
Page 57: Figure 5-3: Rear Case
Replaceable Parts List Table 5-3: Rear case Fig. & index Tektronix part Serial no. Serial no. number number effective discont’d Name & description Rear case 367-0546-00 HANDLE, (PART OF 650-5016-00_ 211-1272-00 SCREW, MACHINE; 6-32 X 0.250, PNH, STEEL, ZINC FINISH, T-15...
Page 58: Figure 5-4: Power Supply
Replaceable Parts List Table 5-4: Power supply Fig. & index Tektronix part Serial no. Serial no. number number effective discont’d Name & description Power supply 119-7038-00 FAN,TUBEAXIAL; 12VDC,0.21A,2.52W, 1.45M^3/MIN, 3150RPM,33DBA,92MM X 92MM X 25MM; SAFETY CONTROLLED 119-7266-00 POWER SUPPLY: CUSTOM AC-DC, 85-264 VAC 45-440HZ IN, +5 V 9 A, +3.3 V 4.5 A, -5 V 0.5 A, +13 V 0.3 A OUT, CCFL BACKLIGHT...
Page 59: Figure 5-5: Rear Chassis
Replaceable Parts List Table 5-5: Rear chassis Fig. & index Tektronix part Serial no. Serial no. number number effective discont’d Name & description Rear chassis 441-2503-00 CHASSIS, ASSEMBLY REAR 211-1272-00 SCREW, MACHINE; 6-32 X 0.250, PNH, STEEL, ZINC FINISH, T-15...
Page 60: Figure 5-6: Fan
Replaceable Parts List Table 5-6: Fan Fig. & index Tektronix part Serial no. Serial no. number number effective discont’d Name & description CHASSIS, ASSEMBLY REAR. (See Table 5-5.) 213-1150-00 SCREW, FLAT HEAD, T15 FAN SCREW, M5X10 Figure 5-6: Fan 5–8 DPO2000 and MSO2000 Series Service Manual www.valuetronics.com...
Page 61: Figure 5-7: Main Board
Replaceable Parts List Table 5-7: Main board Fig. & index Tektronix part Serial no. Serial no. number number effective discont’d Name & description Main board 870-0318-00 CIRCUIT BD ASSY; MAIN; TESTED;389386100; MSO2024 ONLY 870-6186-00 CIRCUIT BD ASSY; MAIN 4 CHN TESTED; 389386100;...
Page 62: Figure 5-8: Front End Assembly
Replaceable Parts List Table 5-8: Front end board Fig. & index Tektronix part Serial no. Serial no. number number effective discont’d Name & description Front end board 441-2502-00 CHASSIS, ASSEMBLY MAIN 870-6261-00 CIRCUIT BD ASSY;FRONT END 4 CH BRD; 389391100; TESTED;...
Page 63: Figure 5-9: Main Chassis
Replaceable Parts List Table 5-9: Main chassis Fig. & index Tektronix part Serial no. Serial no. number number effective discont’d Name & description Main chassis CHASSIS, ASSEMBLY MAIN. (See Table 5-8.) 211-1273-00 SCREW, PT; K35-1.57, PAN HEAD, STL, ZNPL, T-15...
Page 64: Figure 5-10: Display
Replaceable Parts List Table 5-10: Display Fig. & index Tektronix part Serial no. Serial no. number number effective discont’d Name & description 5-10 Display CHASSIS, ASSEMBLY MAIN. (See Table 5-8.) 850-0057-00 FINAL ASSEMBLY;LCD DISPLAY COLOR 211-1272-00 SCREW,MACHINE; 6-32 X 0.250,PNH,STL,ZNPL,T-15 TORX DR Figure 5-10: Display 5–12...
Page 65: Figure 5-11: Front Panel Board
Replaceable Parts List Table 5-11: Front panel board Fig. & index Tektronix part Serial no. Serial no. number number effective discont’d Name & description 5-11 Front panel board 879-0102-01 CIRCUIT BD SUBASSY; FRONT PANEL BD 2CH;389390300 MSO2012, DPO2012 878-0027-01 CIRCUIT BD SUBASSY;FRONT PANEL 4 CH; 389390300...
Page 66: Figure 5-12: Option Key Guides
Replaceable Parts List Table 5-12: Option key guides Fig. & index Tektronix part Serial no. Serial no. number number effective discont’d Name & description 5-12 Option key guides — — — — CIRCUIT BD SUBASSY; FRONT PANEL BD. (See Table 5-11.) 351-1109-00 GUIDE,KEY;...
Page 67: Table 5-13: Replaceable Parts List: Dpo2000 And Mso2000 Accessories
Replaceable Parts List Table 5-13: Replaceable parts list: DPO2000 and MSO2000 Accessories Fig. & index Tektronix part Serial no. Serial no. number number effective discont’d Name & description No Image STANDARD ACCESSORIES See Description CABLE ASSY, POWER; ONE OF: Option...

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