Tektronix MSO3000 Series Service Manual
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Tektronix MSO3000 Series Service Manual

Tektronix MSO3000 Series Service Manual

Digital phosphor oscilloscopes
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MSO3000 and DPO3000 Series
Digital Phosphor Oscilloscopes
ZZZ
Service Manual
*P071266700*
071-2667-00

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Summary of Contents for Tektronix MSO3000 Series

  • Page 1 MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual *P071266700* 071-2667-00...
  • Page 3 This document applies to firmware version 2.00 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 071-2667-00...
  • Page 4 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....................I/O Board ..................... Attenuator Board..................... Main Board ....................Front-Panel Board ...................
  • Page 6 Table of Contents Replaceable Parts List Replaceable Parts List.................... Parts Ordering Information ................. Using the Replaceable Parts List................Index MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual...
  • Page 7 List of Figures Figure 2-1: Oscilloscope module interconnections ............Figure 3-1: Rear panel ................... Figure 3-2: Utility page menu................... Figure 3-3: Calibration selection ................Figure 3-4: Factory information dialog ................ Figure 3-5: Digital channel input (MSO only) ..............Figure 4-1: Locator for internal modules ..............Figure 4-2: Reconnecting the fan cable ................
  • Page 8 Table of Contents List of Tables Table 4-1: External inspection check list ..............Table 4-2: Internal inspection check list ............... Table 5-1: Replaceable parts list: Rear case and rear chassis ..........Table 5-2: Replaceable parts list: I/O and main boards ............Table 5-3: Replaceable parts list: Front panel and power supply ...........

  • 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 MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual...

  • Page 13: Preface

    Preface This service manual provides information that you need to troubleshoot, disassemble, and replace parts on the Tektronix MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes. Manual Conventions This manual uses certain conventions that you should become familiar with before attempting service.
  • Page 14 Preface MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual...

  • Page 15: Operating Information

    Operating Information...
  • Page 17 For information on installing and operating your MSO3000 or DPO3000 Series Oscilloscope, refer to the MSO3000 and DPO3000 Series Oscilloscopes User Manual. This manual is available, in 11 languages, on the Web at www.tektronix.com. MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 1–1...
  • Page 18 Operating Information 1–2 MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual...

  • Page 19: Theory Of Operation

    Theory of Operation...

  • Page 21: Block Diagram

    Theory of Operation This chapter describes the electrical operation of the oscilloscope to the module level. The following figure shows the oscilloscope module interconnections. Block Diagram Figure 2-1: Oscilloscope module interconnections Power Supply The Power Supply board converts AC line voltage to +12 V and +6 V to power all internal circuits.

  • Page 22: I/O Board

    The Power Converter receives the +12 V and +6 V from the main power supply and generates voltages for the analog and digital circuitry on the Main board. Digital Channels The MSO3000 series main board also includes threshold DACs and comparators for the digital channels. 2–2...

  • Page 23: Front-Panel Board

    Theory of Operation Front-Panel Board The Front Panel board contains a microprocessor that reads the front-panel buttons and controls, and then sends this information to the processor system on the Main board. The Front Panel board also generates the probe compensation output signal and provides an interface to the application modules.
  • Page 24 Theory of Operation 2–4 MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual...

  • Page 25: Adjustment Procedures

    Adjustment Procedures...

  • Page 27: Required Equipment

    Fluke or Wavetek 9500 Oscilloscope Calibrator with one 9510 Output Module 50 Ω BNC cable BNC male to BNC male, about 10 in (25 cm.) Tektronix part number 012-0208-00 long Adjustment tool Non-conducting shaft with diameter = 0.1 in. Tektronix part number 003-1433-00 (= 2.5 mm)

  • Page 28: Factory Adjustment Procedure

    Adjustment Procedures The factory adjustment procedure consists of a series of steps; as you move through these steps, the oscilloscope display provides instructions that describe the specific input signal requirements for each step. If the oscilloscope passes the step, it moves on to the next step. If the oscilloscope fails, you can repeat the step or choose to abort the procedure.

  • Page 29: Figure 3-1: Rear Panel

    Adjustment Procedures 3. Power on the oscilloscope calibrator and warm it up for 30 minutes. 4. Connect the active heads from the calibrator to the oscilloscope, ensuring that Channel 1 on the calibrator connects to Channel 1 on the oscilloscope, and so on.

  • Page 30: Figure 3-2: Utility Page Menu

    Adjustment Procedures Figure 3-2: Utility page menu 10. Use the Multipurpose a knob to select Calibration. Figure 3-3: Calibration selection 11. Push the Factory lower-bezel button. The information dialog appears. 3–4 MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual...

  • Page 31: Figure 3-4: Factory Information Dialog

    Adjustment Procedures Figure 3-4: Factory information dialog 12. Push the OK Do Factory Adjustment side-bezel button to start the adjustment process. Prompts appear on the oscilloscope screen to indicate the signal type and the channels to which it should be connected. NOTE.

  • Page 32: Completing The Procedure

    Adjustment Procedures NOTE. The oscilloscope screen will not provide you with all of the information that you need to complete the steps successfully, so it is critical that you follow the steps outlined in the Completing the Procedure section. Each time a new prompt appears, refer to the table above to identify the signal type, and then ensure that you are following every step that is outlined for that specific signal type.
  • Page 33 Adjustment Procedures For 0 V: ground the signal by pushing the grounding lower-bezel button. When this is active, you will not be able to make a channel selection, so in some cases you might need to temporarily deselect the grounding option while you make a channel selection. If the prompt requires all channels and the signal is grounded, The calibrator screen will default to Channel 1.

  • Page 34: Figure 3-5: Digital Channel Input (Mso Only)

    5. On the oscilloscope, push the OK Do Next Step right-bezel button. Deskew (MSO Only) If you are using the MSO3000 Series oscilloscope, and you receive a prompt for a deskew test, complete the following steps: 1. Plug the probe, notch down, into the digital channel input, as shown in the following figure.
  • Page 35 Adjustment Procedures 2. Push the Aux front-panel button, and then push the Zero skew side-bezel button. 3. Set the specified voltage, frequency, and termination. 4. Push the CHANNEL SELECT button and ensure that all channels are selected, including Channel 5. 5.
  • Page 36 Adjustment Procedures Troubleshooting Refer to the following table for common issues encountered during the calibration procedure. Problem Things to try Are the channels hooked up properly, routed to the right channels, and turned on The instrument fails a test 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) If you make a correction or find that everything appears to be correct, click the Go back a step button to try the test again.

  • Page 37: Maintenance

    Maintenance...

  • Page 39: 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 40 Maintenance How often you do maintenance depends on the severity of the environment in which the oscilloscope is used. A proper time to perform preventive maintenance is just before oscilloscope adjustment. General Care The cabinet helps keep dust out of the oscilloscope and should normally be in place when operating the oscilloscope.

  • Page 41: Table 4-1: 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. Lubrication. There is no periodic lubrication required for this oscilloscope.

  • Page 42: Table 4-2: Internal Inspection Check List

    Maintenance CAUTION. To prevent damage from electrical arcing, ensure that circuit boards and components are dry before applying power to the oscilloscope. Table 4-2: Internal inspection check list Item Inspect for Repair action Repair action Circuit boards Loose, broken, or corroded Remove and replace solder connections.

  • Page 43: Overview Of Removal Procedures

    Maintenance 1. Gain access to the parts to be cleaned by removing easily accessible shields and panels (see Removal Procedures). 2. Spray wash dirty parts with the isopropyl alcohol and wait 60 seconds for the majority of the alcohol to evaporate. 3.

  • Page 44: Removal Procedures

    Maintenance List of Modules The Replaceable Parts List chapter provides a list of all replaceable modules. Any replaceable component, assembly, or part is referred to as a 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 located at the beginning of this manual.
  • Page 45 Maintenance Rear Case Follow these steps to remove the rear case assembly. Use a TORX T15 screwdriver tip. (See Figure 5-1 on page 5-5.) 1. Place the oscilloscope face down on the work surface. 2. Remove the four T15 screws from the back of the rear case assembly. When reinstalling the rear case torque these screws to 8.0 in/lb.

  • Page 46: Figure 4-2: Reconnecting The Fan Cable

    Maintenance Figure 4-2: Reconnecting the fan cable Follow these steps to remove the fan assembly. You need to have previously removed the rear case assembly and rear chassis. Use a pair of pliers. (See Figure 5-2 on page 5-7.) 1. Use a pair of pliers to bend the tabs that hold the fan in the chassis. 2.
  • Page 47 Maintenance Power Supply Module Follow these steps to remove the power supply module. You need to have previously removed the rear case assembly rear chassis, and I/O board. Use a TORX T15 screwdriver tip. (See Figure 5-3 on page 5-9.) 1.

  • Page 48: Figure 4-4: Disconnecting The Main Board

    5-7.) Then use a spudger or small screwdriver to make sure that J101 is firmly seated on the front panel board. (See Figure 5-6 on page 5-15.) For MSO3000 Series oscilloscopes, make sure that the Digital Probe Guide is in place before reinstalling the main board.
  • Page 49 Maintenance Attenuator Board Follow these steps to remove the attenuator board. You need to have previously removed the rear case assembly, rear chassis, power supply, I/O board, and main board. Use a TORX T15 screwdriver tip. (See Figure 5-5 on page 5-13.) 1.

  • Page 50: Figure 4-5: Display Cable Shield In Place

    Maintenance Display Module Follow these steps to remove the display module. You need to have previously removed the rear case assembly, rear chassis, power supply, I/O board, main board, attenuator board, and front chassis. Use a TORX T15 screwdriver tip. (See Figure 5-6 on page 5-15.) 1.

  • Page 51: Troubleshooting

    Maintenance Front-panel USB Use this procedure to remove the front-panel USB connector. You must have previously removed the rear case assembly, rear chassis, power supply, I/O board, Connector main board, attenuator board, and front chassis. Use a TORX T15 screwdriver tip, needle-nose pliers, and a razor knife.

  • Page 52: Troubleshooting Procedure

    Maintenance Adjustment After Repair If you replace the Main board, you must adjust the instrument after repair. (See page 3-1, Adjustment Procedures.) Required Tools and You need the following equipment to troubleshoot the instrument. Equipment Tools and Equipment Example 3.5 digits or greater Troubleshooting Procedure The following diagrams are troubleshooting procedure flowcharts.
  • Page 53 Maintenance Flowchart 2 — AC power supply troubleshooting procedure MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 4–15...

  • Page 54: 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. 4–16...
  • Page 55 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 56 Maintenance 4–18 MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual...
  • Page 57 Replaceable Parts List...

  • Page 59: Replaceable Parts List

    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 60 Module Servicing Modules can be serviced by selecting one of the next three options. Contact your local Tektronix service center or representative for repair assistance. Module Exchange. In some cases you may exchange your module for a remanufactured module. These modules cost significantly less than new modules and meet the same factory specifications.

  • Page 61: Using The Replaceable Parts List

    Figure & Index Items in this section are referenced by figure and index Number numbers to the exploded view illustrations that precede the list. Tektronix Part Use this part number when ordering replacement parts Number from Tektronix. 3 and 4...

  • Page 62: Table 5-1: Replaceable Parts List: Rear Case And Rear Chassis

    Replaceable Parts List Table 5-1: Replaceable parts list: Rear case and rear chassis Fig. & index Tektronix Serial no. Serial no. number part number effective discont’d Name & description 5-1-1 202-0462-00 CASE, REAR ASSEMBLY 367-0548-XX HANDLE; CARRYING; SAFETY CONTROLLED 348-1909-XX FOOT REAR;...

  • Page 63: Figure 5-1: Exploded View: Rear Case And Rear Chassis

    Replaceable Parts List Figure 5-1: Exploded view: rear case and rear chassis MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 5–5...

  • Page 64: Table 5-2: Replaceable Parts List: I/O And Main Boards

    Replaceable Parts List Table 5-2: Replaceable parts list: I/O and main boards Fig. & index Tektronix Serial no. Serial no. number part number effective discont’d Name & description 5-2-1 119-7365-00 FAN; 120MM, TUBEAXIAL, 12 VDC; SAFETY CONTROLLED 870-0015-01 CIRCUIT BOARD ASSY;2 & 4 CH I/O MAIN;389378600;TESTED;DPO3000...

  • Page 65: Figure 5-2: Exploded View: I/O And Main Boards

    Replaceable Parts List Figure 5-2: Exploded view: I/O and main boards MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 5–7...

  • Page 66: Table 5-3: Replaceable Parts List: Front Panel And Power Supply

    Replaceable Parts List Table 5-3: Replaceable parts list: Front panel and power supply Fig. & index Tektronix part Serial no. Serial no. number number effective discont’d Name & description 5-3-1 119-7281-00 POWER SUPPLY; CUSTOM,MALIBU,AC-DC;85-275 VAC 45-440HZ IN;+6VDC 6A,12V 4A OUT;PLUS SOFT SWITCH & LINE TRIGGER OUTPUT;SAFETY CONTROLLED...

  • Page 67: Figure 5-3: Exploded View: Front Panel And Power Supply

    Replaceable Parts List Figure 5-3: Exploded view: Front panel and power supply MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 5–9...

  • Page 68: Table 5-4: Replaceable Parts List: Front Panel Labels

    Replaceable Parts List Table 5-4: Replaceable parts list: Front panel labels Fig. & index Tektronix Serial no. Serial no. number part number effective discont’d Name & description 5-4-1 335-1926-00 LABEL. FRONT PANEL, OVERLAY, RUSSIAN 335-1925-00 LABEL. FRONT PANEL, OVERLAY, KOREAN 335-1924-00 LABEL.

  • Page 69: Figure 5-4: Exploded View: Front Panel Labels

    Replaceable Parts List Figure 5-4: Exploded view: Front panel labels MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 5–11...

  • Page 70: Table 5-5: Replaceable Parts List: Attenuator

    211-1275-00 SCREW, MACHINE; W/HEAVY PATCH THREADLOCKING MATERIAL; 6-32 X 0.312 L, PNH,STL,ZNPL, T15 211-1272-00 SCREW,MACHINE; 6-32 X 0.250,PNH,STL,ZNPL,T-15 TORX DR 351-1130-00 DIGITAL PROBE GUIDE (MSO3000 SERIES ONLY) 870-0030-00 ATTENUATOR CIRCUIT BD ASSY;TESTED;8780030XX,3893928XX WIRED (4-CHANNEL MODELS) 870-0032-01 ATTENUATOR CIRCUIT BD ASSY;TESTED;8780030XX,3893928XX WIRED (2-CHANNEL MODELS) 5–12...

  • Page 71: Figure 5-5: Exploded View: Main Board Shield And Attenuator Board

    Replaceable Parts List Figure 5-5: Exploded view: Main board shield and attenuator board MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 5–13...

  • Page 72: Table 5-6: Replaceable Parts List: Front Chassis And Lcd

    CHASSIS, FRONT; SAFETY CONTROLLED, DPO3032 Only C011229 CHASSIS, FRONT; SAFETY CONTROLLED, DPO3014 Only C010713 CHASSIS, FRONT; SAFETY CONTROLLED, DPO3012 Only CHASSIS, FRONT; SAFETY CONTROLLED, MSO3000 Series 211-1273-00 SCREW, PT; K35-1.57, PAN HEAD, STL, ZNPL, T-15 850-0043-00 LCD DISPLAY ASSEMBLY 211-1272-00 SCREW,MACHINE;...

  • Page 73: Figure 5-6: Exploded View: Front Chassis And Lcd Assembly

    Replaceable Parts List Figure 5-6: Exploded view: Front chassis and LCD assembly MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 5–15...

  • Page 74: Table 5-7: Replaceable Parts List: Front Panel And Front Case

    Replaceable Parts List Table 5-7: Replaceable parts list: Front panel and front case Fig. & index Tektronix Serial no. Serial no. number part number effective discont’d Name & description 5-7-1 878-0323-01 CIRCUIT BOARD SUBASSY;4 CH FRONT PANEL;UNTESTED,389423000 (MSO 4-CHANNEL MODELS) 878-0322-01 CIRCUIT BOARD SUBASSY;2 CH FRONT...

  • Page 75: Figure 5-7: Exploded View: Front Panel Board And Front Case

    Replaceable Parts List Figure 5-7: Exploded view: front panel board and front case MSO3000 and DPO3000 Series Digital Phosphor Oscilloscopes Service Manual 5–17...

  • Page 76: Table 5-8: Replaceable Parts List: Standard Accessories

    Replaceable Parts List Table 5-8: Replaceable parts list: Standard accessories Fig. & index Tektronix Serial no. Serial no. number part number effective discont’d Name & description 200-5052-00 COVER, FRONT, PROTECTIVE CABLE ASSY, POWER: Description Option Country Part number NORTH AMERICA...
  • Page 77 Index...
  • Page 79 Index front chassis removal, 4-11 removal procedures, 4-5–4-6 front panel removal, 4-13 attenuator board, 4-11 acquisition system, front panel, description, 2-3 display module, 4-12 description, 2-2 fans, 4-8 adjustment procedure, 3-1 front chassis, 4-11 factory, 3-2, 3-6 front panel, 4-13 adjustments, 3-1 I/O board connections, 2-2 I/O board, 4-8...

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