Use the product only as specified. Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. Carefully read all instructions. Retain these instructions for future reference.

This product shall be used in accordance with local and national codes.

For correct and safe operation of the product, it is essential that you follow generally accepted safety procedures in addition to the safety precautions specified in this manual.

The product is designed to be used by trained personnel only.

Only qualified personnel who are aware of the hazards involved should remove the cover for repair, maintenance, or adjustment.

Before use, always check the product with a known source to be sure it is operating correctly.

This product is not intended for detection of hazardous voltages.

Use personal protective equipment to prevent shock and arc blast injury where hazardous live conductors are exposed.

While using this product, you may need to access other parts of a larger system. Read the safety sections of the other component manuals for warnings and cautions related to operating the system.

When incorporating this equipment into a system, the safety of that system is the responsibility of the assembler of the system.

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.

These terms may appear in this manual:

WARNING:Warning statements identify conditions or practices that could result in injury or loss of life.

CAUTION:Caution statements identify conditions or practices that could result in damage to this product or other property.

These terms may appear on the product:

• DANGER indicates an injury hazard immediately accessible as you read the marking.
• WARNING indicates an injury hazard not immediately accessible as you read the marking.
• CAUTION indicates a hazard to property including the product.

When this symbol is marked on the product, be sure to consult the manual to find out the nature of the potential hazards and any actions which have to be taken to avoid them. (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 Manual

Protective Ground (Earth) Terminal

Earth Terminal

Chassis Ground

WARNING: High Voltage

Standby

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. Material that does not have any specific product designation applies to all products in the manual.

This manual refers to any field-replaceable assembly or mechanical part specifically by its name or generically as a replaceable part. In general, a replaceable part is any circuit board or assembly (such as the hard disk drive) or a mechanical part (such as the I/O port connectors) that is listed in the replaceable parts list that can be replaced in the field.(See Replaceable parts list).

For information on installing, operating, and networking the instrument, refer to the online help or user manual that was provided with your oscilloscope. You can also find the manual at www.tek.com/manuals, by searching for your product.

The Power Supply board converts AC line voltage to +12 V to power for all internal circuits.

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.

Rear panel I/O ports

The Carrier interface assembly contains USB ports, an Ethernet port (LAN), a VGA Video port, a DVI Video port, a DisplayPort Video port, the USB-TMC port, an AUX OUT BNC connector, an EXT REF IN BNC connector, and the AFG Out generator BNC connector.

Power converter

The Carrier interface assembly converts the +12 V power to all voltages used for the analog and digital circuitry throughout the system. Standby power is used to keep portions of the Carrier interface assembly and Main board powered at all times that AC power is connected to the instrument.

Other functions

The Carrier interface assembly also houses the AFG generator, USB-TMC controller and interfaces to the Power supply and various cooling fans. The Carrier interface assembly also provides the interface to the optional Windows drive.

The Main and Analog boards contain the following functions:

Acquisition system

The Acquisition system begins with the analog signal path and ends with a digitized signal in memory. The signal enters a channel input, and then passes through an attenuator and preamplifier. The analog signal from each preamplifier goes through a digitizer, and then into acquisition memory. The analog signal from each preamplifier is also distributed to a trigger circuit.

Front-end

All of the analog and digital inputs are routed to the Front-end board. The analog channels are amplified and attenuated through the front-end circuitry, and are output to the Main board. The digital channels simply pass through the front-end board to the Main board. The front-end board has a controller that is used as an I/O controller for the front-end board.

Power converter

The Main board converts the +12 V power to some of the other voltages used for the analog and digital circuitry throughout the system. This is in addition to the power conversion provided by the Processor assembly.

The Front Panel board contains digital logic that reads the front-panel buttons and controls and sends this information to the processor system on the Processor assembly. The Front Panel board also generates the probe compensation output signal, provides USB ports on the front panel and houses the main power switch. The front panel routes the digital front-end signals from the probe directly to the front-end board. The front panel also provides the video interface to the internal HD display.

The voltage and timing references inside the instrument are very stable over time and do not need routine adjustment.

If the instrument fails the performance tests in the Specifications and Performance Verification manual, adjustment may be required. To download the 5 Series B MSO Specification and Performance Verification manual (Tektronix part number 077-1725-XX), go to http://www.tek.com/product-support, enter the manual part number (with no dashes) in the field, click GO, and then select the Specification and Performance Verification document to download.

If your organization requires periodic calibration, a general rule is to verify performance and make adjustments (only if needed) every 2000 hours of operation or once a year if the instrument is used infrequently.

After removal and replacement of any module, you must perform the Performance Verification procedures, found in the Specifications and Performance Verification manual (Tektronix part number 077-1725-XX), available to download from the Tektronix web site (http://www.tek.com/product-support).

If the instrument fails any Performance Verification tests, it must be returned to a Tektronix Service Center for adjustment and calibration.

Before servicing this product, read the General Safety Summary and the Service Safety Summary at the front of the manual, as well as the following ESD information.

CAUTION:Electrostatic discharge (ESD) can damage any semiconductor component in this instrument.

When performing any service that requires internal access to the instrument, adhere to the following precautions to avoid damaging internal modules and their components due to electrostatic discharge:

1. Minimize handling of static-sensitive circuit boards and components.

2. Transport and store static-sensitive modules in their static protected containers or on a metal rail. Label any package that contains static-sensitive boards.

3. Discharge the static voltage from your body by wearing a grounded antistatic wrist strap while handling these modules.

4. Service static-sensitive modules only at a static-free work station.

5. Do not allow any items capable of generating or holding a static charge on the work station surface.

6. Handle circuit boards by the edges when possible.

7. Do not slide the circuit boards over any surface.

8. Avoid handling circuit boards in areas that have a floor or work-surface covering capable of generating a static charge.

Inspection and Cleaning describes how to inspect for dirt and damage. It also describes how to clean the exterior and interior of the instrument. Inspection and cleaning are done as preventive maintenance. Preventive maintenance, when done regularly, may prevent instrument malfunction and enhance its reliability.

Preventive maintenance consists of visually inspecting and cleaning the instrument and using general care when operating it.

How often to perform maintenance depends on the severity of the environment in which the instrument is used. A proper time to perform preventive maintenance is just before instrument adjustment.

This section contains procedures for removal and installation of replaceable modules in the instrument. Refer to Replaceable Parts List for lists and exploded views of replaceable modules.

Any module inside of the chassis that does not have a remove and replace procedure requires that the entire instrument be returned to Tektronix Service Center for service.

WARNING:Before performing this or any other procedure in this manual, read the safety summaries found at the beginning of this manual. Also, to prevent possible injury to service personnel or damage to the instrument components, read Preventing ESD. Before performing any procedure in this subsection, disconnect the power cord from the line voltage source. Failure to do so could cause serious injury or death.

Note:Read the cleaning procedure before disassembling the instrument for cleaning.

CAUTION:Before performing this or any other procedure in this manual, read the General Safety Summary and Service Safety Summary found at the beginning of this manual. To prevent possible injury to service personnel or damage to electrical components, please read information on Preventing ESD. (See Preventing ESD.)

This section contains information and procedures designed to help you isolate faults to a module.

This section requires that service personnel have the appropriate skills to work on this instrument, including PC troubleshooting and Microsoft Windows operating system skills. Details of PC and Windows operation and service are not in this manual.

For assistance, contact your local Tektronix Service Center.

Use the lists in the appropriate section to identify and order replacement parts for your product. Replacement parts are available through your local Tektronix field office or representative.

Standard accessories for these products are listed in your user manual. The user manual is available at http://www.tek.com/manuals.

Changes to Tektronix products are sometimes made to accommodate improved components as they become available and to give you the benefit of the latest improvements. Therefore, when ordering parts, it is important to include the following information in your order:

• Part number

• Instrument type or model number

• Instrument serial number

• 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.

Modules can be serviced by selecting one of the following 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. For more information about the module exchange program, call 1-800-833-9200. Outside North America, contact a Tektronix sales office or distributor; see the Tektronix Web site (www.tek.com) for a list of offices.

Module repair and return. You may ship your module to us for repair, after which we will return it to you.

New modules. You may purchase replacement modules in the same way as other replacement parts.

Abbreviations conform to the American National Standard ANSI Y1.1-1972.

This section contains a list of the replaceable mechanical and/or electrical components. Use this list to identify and order replacement parts. The following table describes each column in the parts list.