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5 Series B Mixed Signal Oscilloscope
Service Manual
MSO54B, MSO56B, MSO58B
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.
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*P 077172600*
077-1726-00
May 2023
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Table of Contents
Troubleshooting
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Summary of Contents for Tektronix MSO54B
- Page 1 5 Series B Mixed Signal Oscilloscope Service Manual MSO54B, MSO56B, MSO58B 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.
- Page 2 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. Specifications and price change privileges reserved.
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Page 3: Table Of Contents
Remove the power supply assembly..........................23 Remove carrier interface assembly..........................25 Remove the AFG riser assembly..........................27 Remove handle hub assembly............................28 Remove the main fan assembly............................28 Troubleshooting 5 Series B MSO............................29 Service level................................. 29 5 Series B Mixed Signal Oscilloscope Service Manual MSO54B, MSO56B, MSO58B... - Page 4 Table of Contents Check for common problems............................30 Equipment required..............................30 Troubleshooting flow chart............................31 Troubleshoot the power supply.............................32 Instrument self tests..............................34 Software updates................................34 Power supply module replacement..........................34 Replaceable parts list..................................35 Parts ordering information..............................35 Module servicing.................................. 35 Abbreviations..................................35 Using the replaceable parts list............................36 Front cover and rear case..............................37 Carrier interface board and rear chassis..........................39 Baffle and power supply module............................
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Page 5: Important Safety Information
Do not connect or disconnect probes or test leads while they are connected to a voltage source. Use only insulated voltage probes, test leads, and adapters supplied with the product, or indicated by Tektronix to be suitable for the product. - Page 6 Important safety information Observe all terminal ratings To avoid fire or shock hazard, observe all rating and markings on the product. Consult the product manual for further ratings information before making connections to the product. Do not exceed the Measurement Category (CAT) rating and voltage or current rating of the lowest rated individual component of a product, probe, or accessory.
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Page 7: Probes And Test Leads
Do not float the reference lead of this probe when using with ground-referenced oscilloscopes. The reference lead must be connected to earth potential (0 V). Floating measurement use Do not float the reference lead of this probe above the rated float voltage. 5 Series B Mixed Signal Oscilloscope Service Manual MSO54B, MSO56B, MSO58B... -
Page 8: Service Safety Summary
Important safety information Service safety summary The Service safety summary section contains additional information required to safely perform service on the product. Only qualified personnel should perform service procedures. Read this Service safety summary and the General safety summary before performing any service procedures. -
Page 9: Symbols On The Product
(This symbol may also be used to refer the user to ratings in the manual.) The following symbols(s) may appear on the product. CAUTION: Refer to Protective Ground Earth Terminal Chassis Ground WARNING: High Standby Manual (Earth) Terminal Voltage 5 Series B Mixed Signal Oscilloscope Service Manual MSO54B, MSO56B, MSO58B... -
Page 10: Preface
Be sure to read the introductions to all procedures. These introductions provide important information needed to perform the service correctly, safely, and efficiently. Supported products This manual contains information that is necessary to service the following products: • MSO54B • MSO56B • MSO58B Check for a specific product designation in the header at the top of the page, in a heading, table or figure title, or within text. -
Page 11: Theory Of Operation
This chapter describes the electrical operation of the oscilloscope to the module level. The block diagram shows the oscilloscope module interconnections. Figure 1: Block diagram Power supply The Power Supply board converts AC line voltage to +12 V to power for all internal circuits. 5 Series B Mixed Signal Oscilloscope Service Manual MSO54B, MSO56B, MSO58B... -
Page 12: Carrier Interface Assembly
Theory of operation Carrier interface assembly The Carrier interface assembly contains the following functions: Processor system The processor system contains a microprocessor that controls the entire instrument. The processor system also contains the solid state drive for the operating system, system RAM, and interfaces to I/O ports and the acquisition system. -
Page 13: Adjustment Procedures
Adjustment procedures Adjustment procedures Adjustment and calibration can be performed only by a Tektronix Service Center. See Contacting Tektronix, following the title page in this manual, for information on contacting Tektronix Service Support. Adjustment interval The voltage and timing references inside the instrument are very stable over time and do not need routine adjustment. -
Page 14: Maintenance
Use a 75% isopropyl alcohol solution as a cleaner for cabinet parts. Before using any other type of cleaner, consult your Tektronix Service Center or representative. Inspection - Exterior. Inspect the outside of the instrument for damage, wear, and missing parts. Immediately repair defects that could... -
Page 15: Flat Panel Display Cleaning
Do not disassemble or clean the front chassis assembly (other than cleaning the front panel display and removing panel knobs). Disassembling the front chassis assembly requires that the instrument be returned to your nearest Tektronix Service Center for calibration. WARNING: To avoid electric shock or damage to the instrument, remove instrument power. Before performing any procedure that follows, power down the instrument and disconnect it from line voltage. -
Page 16: Lubrication
• Type and serial number of the instrument. • Reason for returning. • A complete description of the required service. Mark the address of the Tektronix Service Center and the return address on the shipping carton in two prominent locations. -
Page 17: Removal And Replace Procedures
There are eight knob assemblies that can be removed from the front case. Procedure 1. To remove a knob assembly, pull the knob straight out of the front panel. Finger strength is adequate to pull knobs. Do not use pliers. 5 Series B Mixed Signal Oscilloscope Service Manual MSO54B, MSO56B, MSO58B... -
Page 18: Remove Sata Riser Board Assembly
Maintenance 2. To reinstall a knob, align the knob with the shaft indent and press the knob onto the shaft. Turn the knob to make sure there is a smooth rotation. Remove SATA riser board assembly Use this procedure to remove and replace the external hard drive SATA riser board assembly. Before you begin •... -
Page 19: Remove Handle
4. Slide the rear case off of the rear chassis. 5. To reinstall, reverse the steps. Tighten the six T-10 Torx rear case screws to 0.65 N·m. Tighten the six T-8 Torx rear grill screws to 0.45 N·m. 5 Series B Mixed Signal Oscilloscope Service Manual MSO54B, MSO56B, MSO58B... -
Page 20: Remove Rear Chassis Assembly
Maintenance Remove rear chassis assembly Use this procedure to remove and replace the rear chassis, to access rear chassis assemblies (power supply, main fan, Carrier interface assembly, AFG Riser board). Before you begin • To prevent electrostatic damage to components whenever you work on the instrument, wear properly-grounded electrostatic prevention wrist and foot straps, and work in a tested antistatic environment on an antistatic mat. -
Page 21: Remove The Baffle Bracket
1. Set the rear chassis with the rear side down. 2. Remove the five T-10 Torx screws from the baffle bracket. The middle two screws are Loctite patch screws (see Replaceable Parts List). 5 Series B Mixed Signal Oscilloscope Service Manual MSO54B, MSO56B, MSO58B... - Page 22 Maintenance 3. Remove the 14 T-10 Torx screws from outside the chassis that secure the baffle bracket in place. 4. To reinstall, reverse the steps. Use a T-10 Torx screwdriver to tighten the screws to 0.65 N·m.
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Page 23: Remove The Power Supply Assembly
1. Disconnect the cables connecting the power supply to the carrier interface assembly, AFG riser board, and AC line filter. 2. Use a T-10 Torx bit screwdriver to remove the four screws securing the power supply assembly to the chassis. Tighten screws to 0.65 N·m when reinstalling. 5 Series B Mixed Signal Oscilloscope Service Manual MSO54B, MSO56B, MSO58B... - Page 24 Maintenance 3. Remove the power supply assembly from the rear chassis. 4. Disconnect the three power supply cables from the power supply board. 5. Remove the fan from the four elastic retaining grommets that secure the fan to the bracket. To reinstall the fan, use needle nose pliers to pull the grommet ends through the fan mounting holes.
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Page 25: Remove Carrier Interface Assembly
2. Disconnect the black cables connecting the power supply to the carrier interface assembly and the white cable on the AFG riser board. You do not need to disconnect the AC line filter cables. 5 Series B Mixed Signal Oscilloscope Service Manual MSO54B, MSO56B, MSO58B... - Page 26 Maintenance 3. Disconnect fan cables. 4. Use a T-10 Torx screwdriver to remove the eight screws on the bottom of the chassis.
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Page 27: Remove The Afg Riser Assembly
Use this procedure to remove and replace the AFG riser assembly from the carrier interface assembly. Only use this procedure as part of the sanitize process before sending the instrument for repairs at a Tektronix Service Center. Before you begin •... -
Page 28: Remove Handle Hub Assembly
Maintenance 2. Lift the AFG riser assembly straight up from the carrier interface assembly. 3. To reinstall, reverse the steps. Tighten the T-10 Torx screw to 0.65 N·m when reinstalling. Remove handle hub assembly Use this procedure to remove and replace the handle hubs from the rear chassis. You will need to remove the left side hub if you want to remove the main fan. -
Page 29: Troubleshooting 5 Series B Mso
This subsection contains information and procedures to help you determine if a faulty power supply is the problem with your instrument. If replacing the power supply does not fix the fault, you will need to return the instrument to a Tektronix Service Center for repair, as no other internal electronic assemblies or modules are user-replaceable. -
Page 30: Check For Common Problems
Maintenance Check for common problems Use the following table to help isolate possible failures. The table lists problems and possible causes. The list is not exhaustive, but it may help you eliminate a problem that is quick to fix, such as a loose power cord. Table 4: Failure symptoms and possible causes Symptom Possible cause(s) -
Page 31: Troubleshooting Flow Chart
Status LEDs. A set of six bi-color LEDs report the power management status of the instrument. These LEDs are located under the cover on the bottom of the instrument. 5 Series B Mixed Signal Oscilloscope Service Manual MSO54B, MSO56B, MSO58B... -
Page 32: Troubleshoot The Power Supply
All of these LEDs should be green a few moments after powering on the instrument. If any of these LEDs are red, or are not lit, return the instrument to a Tektronix Service Center for repair. Troubleshoot the power supply Use this procedure to determine if the power supply is defective and needs replaced. - Page 33 AC line filter. If there is AC at the line filter, replace the power supply module or reassemble and return the instrument to a Tektronix Service Center for repair. WARNING: Be careful when measuring the AC line voltage to avoid injury to yourself or damage to the instrument.
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Page 34: Instrument Self Tests
1. Go to www.tek.com/product-support. 2. Enter a model number (MSO54B, MSO56B, or MSO58B) in the Enter Product or Product Series Name field and click Go. Any 5 Series B model number will do, as all models use the same software update. -
Page 35: Replaceable Parts List
Instrument serial number • 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. Module servicing Modules can be serviced by selecting one of the following three options. -
Page 36: 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. This indicates the quantity of parts used. Name and description An item name is separated from the description by a colon (:). -
Page 37: Front Cover And Rear Case
CASE, ACCESSORY FRONT COVER 200-5406-XX COVER, FRONT PROTECTIVE 065-1078-XX MODULE ASSY: SERVICE REPLACEMENT KIT; HANDLE HUB LEFT & RIGHT (SET) 202-0521-XX CASE, REAR, SAFETY CONTROLLED 220-0325-XX INSERT, 2.5MM, SNAP IN Table continued… 5 Series B Mixed Signal Oscilloscope Service Manual MSO54B, MSO56B, MSO58B... - Page 38 Replaceable parts list Index Tektronix part number Qty Name and description number 335-3850-XX MARKER, IDENTIFICATION, SERVICE US PLUS, ENGLISH 335-3851-XX MARKER, IDENTIFICATION, SERVICE EUROPE, ENGLISH 335-3852-XX MARKER, IDENTIFICATION, SERVICE JAPAN, JAPANESE 335-3853-XX MARKER, IDENTIFICATION, SERVICE CHINA, SIMPLIFIED CHINESE 335-3854-XX MARKER, IDENTIFICATION, SERVICE OTHER, ENGLISH 050-3904-XX MODULE ASSY: SERVICE REPLACEMENT KIT;...
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Page 39: Carrier Interface Board And Rear Chassis
BRKT, 120MM X 38MM FAN, SAFETY CONTROLLED 348-2082-XX GROMMET, FAN MOUNT, NOISE DAMPING 441-2948-XX CHASSIS, REAR, SAFETY CONTROLLED 878-1783-XX CIRCUIT BOARD ASSY; AFG RISER BOARD, 3895534XX Return the instrument to Tektronix for service. Table continued… 5 Series B Mixed Signal Oscilloscope Service Manual MSO54B, MSO56B, MSO58B... - Page 40 065-1076-XX MODULE ASSY: SERVICE REPLACEMENT KIT;CARRIER INTERFACE BOARD;WITH BIOS AND SSD; FULLY TESTED Return the instrument to Tektronix for service. 119-8250-XX DISK DRIVE; SOLID STATE, 512GB (WAS 480), 2.5 IN, SATA III, 6.0 GB/ S, MLC, 7 MM; SAFETY CONTROLLED, UNPROGRAMMED Service will image the SSD according to appropriate OS and processor type or purchase SUP5B-WIN.
- Page 41 Tektronix part Serial no. Serial no. Name & description number number effective discont'd 213-1150-XX SCREW, FLAT HEAD, T15 FAN SCREW, M5X10 343-1778-XX CLAMP, CABLE; HOLE MOUNT 337-4804-XX SHIELD, LAN PORT 5 Series B Mixed Signal Oscilloscope Service Manual MSO54B, MSO56B, MSO58B...
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Page 42: Baffle And Power Supply Module
337-4717-XX SHIELD, MOUNT, POWER SUPPLY, SAFETY CONTROLLED 119-8375-XX POWER SUPPLY; INTERNAL, AC-DC; 90-264VAC 47-63HZ, 103-127VAC 360-440HZ IN; +12V 44A, +12VSB 1.25A OUT; I2C, PSON, ACOK, PWRGOOD SIGNALS; SAFETY CONTROLLED, SAFETY CONTROLLED Return the instrument to Tektronix for service. Table continued…... -
Page 43: Mid-Plane Chassis
HEATSINK, AFE 4-8 CHANNEL for 2 GHz units only Return the instrument to Tektronix for service. 348-2298-XX GASKET, CONDUCTIVE FOAM W/PSA 12MM X 29MM X 1.5MM THICK Table continued… 5 Series B Mixed Signal Oscilloscope Service Manual MSO54B, MSO56B, MSO58B... - Page 44 Return the instrument to Tektronix for service. 211-1584-XX SCREW, MACHINE, M3 X 0.5 X 6MM PAN HEAD, TORX T10 870-1721-XX CIRCUIT BOARD ASSY;MSO54B, 4CH MAIN, TESTED 8781721XX Return the instrument to Tektronix for service. 870-1733-XX CIRCUIT BOARD ASSY;MSO58B/56B, 8CH/6CH MAIN, TESTED 8781733XX Return the instrument to Tektronix for service.
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Page 45: Front Panel And Display
SCREW, MACHINE, M3 X 0.5 X 6MM PAN HEAD, TORX T10 4 channel quantity 6 channel quantity 8 channel quantity 174-6610-XX CABLE ASSY, DISPLAY-FRONT PANEL Return the instrument to Tektronix for service. Table continued… 5 Series B Mixed Signal Oscilloscope Service Manual MSO54B, MSO56B, MSO58B... - Page 46 Tektronix part number Qty Name and description number 174-7244-XX CABLE, DISCRETE WIRE TOUCH CONTROLLER TO FRONT PANEL Return the instrument to Tektronix for service. 366-0920-XX BUTTON, POWER SWITCH, SAFETY CONTROLLED Return the instrument to Tektronix for service. 878-1717-XX CIRCUIT BOARD ASSY;PROBE INTERFACE, 3895488XX Return the instrument to Tektronix for service.
- Page 47 Return the instrument to Tektronix for service. 351-1150-XX GUIDE, PROBE VPI PLUS Return the instrument to Tektronix for service. 4 channel quantity 6 channel quantity 8 channel quantity Table continued… 5 Series B Mixed Signal Oscilloscope Service Manual MSO54B, MSO56B, MSO58B...
- Page 48 Replaceable parts list Index Tektronix part number Qty Name and description number 335-3680-XX MARKER IDENTIFICATION, LABEL FRONT PANEL, MSO, 4 CHANNEL, SAFETY CONTROLLED 335-3678-XX MARKER IDENTIFICATION, LABEL FRONT PANEL, MSO, 6 CHANNEL, SAFETY CONTROLLED 335-3676-XX MARKER IDENTIFICATION, LABEL FRONT PANEL, MSO, 8 CHANNEL, SAFETY...
- Page 49 MARKER, IDENTIFICATION; LABEL NOMENCLATURE, MSO, 4CH, 1GHZ, SAFETY CONTROLLED 335-4499-XX MARKER, IDENTIFICATION; LABEL NOMENCLATURE, MSO, 4CH, 500MHZ, SAFETY CONTROLLED 335-4500-XX MARKER, IDENTIFICATION; LABEL NOMENCLATURE, MSO, 4CH, 350MHZ, SAFETY CONTROLLED 5 Series B Mixed Signal Oscilloscope Service Manual MSO54B, MSO56B, MSO58B...
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