Related Manuals for Tektronix 3 Series
Summary of Contents for Tektronix 3 Series
- Page 1 3 Series MDO Mixed Domain Oscilloscope Service Manual Register now! Click the following link to protect your product. www.tek.com/register 077-1500-01...
- 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 AC line filter.............................. 13 Remove the power supply assembly..........................15 Remove the I/O board..............................16 Remove front-panel knobs............................18 Troubleshooting the 3 Series MDO............................18 Level of service................................18 Check for common problems............................18 3 Series MDO Mixed Domain Oscilloscope Service Manual... - Page 4 After power supply module replacement........................22 Replaceable parts..................................23 Parts ordering information..............................23 Module servicing.................................. 23 Abbreviations..................................23 Using the replaceable parts list............................23 Rear case.....................................24 Rear chassis..................................26 Front chassis..................................28 Front panel and display................................30 3 Series MDO Mixed Domain Oscilloscope Service Manual...
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Page 5: List Of Figures
Figure 7: Module isolation troubleshooting procedure........................ 21 Figure 8: Rear case exploded view.............................24 Figure 9: Rear chassis exploded view............................26 Figure 10: Front chassis exploded (rear) view..........................28 Figure 11: Front panel and display exploded view........................30 3 Series MDO Mixed Domain Oscilloscope Service Manual... - Page 6 Table 4: Failure symptoms and possible causes.........................18 Table 5: Parts list column descriptions............................23 Table 6: Rear case..................................25 Table 7: Rear chassis..................................26 Table 8: Front chassis................................. 28 Table 9: Front panel and display ..............................30 3 Series MDO Mixed Domain Oscilloscope Service Manual...
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Page 7: Important Safety Information
Do not operate without covers Do not operate this product with covers or panels removed, or with the case open. Hazardous voltage exposure is possible. Avoid exposed circuitry Do not touch exposed connections and components when power is present. 3 Series MDO Mixed Domain Oscilloscope Service Manual... - Page 8 Use care when lifting and carrying the product. This product is provided with a handle or handles for lifting and carrying. Use only the Tektronix rackmount hardware specified for this product. Probes and test leads Before connecting probes or test leads, connect the power cord from the power connector to a properly grounded power outlet.
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Page 9: Service Safety Summary
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. 3 Series MDO Mixed Domain Oscilloscope Service Manual... -
Page 10: Symbols On The Product
(This symbol may also be used to refer the user to ratings in the manual.) The following symbols may appear on the product: 3 Series MDO Mixed Domain Oscilloscope Service Manual... -
Page 11: Preface
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. 3 Series MDO Mixed Domain Oscilloscope Service Manual... -
Page 12: Theory Of Operation
Theory of operation 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: MDO34 block diagram 3 Series MDO Mixed Domain Oscilloscope Service Manual... -
Page 13: Power Supply
Main board. The Front Panel board also generates the probe compensation output signal and provides USB ports on the front panel. The front panel routes the front-end signals from the probe directly to the front-end board. 3 Series MDO Mixed Domain Oscilloscope Service Manual... -
Page 14: Adjustment Procedures
Adjustment procedures This chapter contains information about instrument adjustment. Adjustment 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 15: 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 cause personal injury or lead to further damage to the instrument. -
Page 16: 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 17: Lubrication
• 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. Remove and replace procedures This section contains procedures for removal and installation of replaceable modules in the instrument. Refer to Replaceable parts on page 23 for lists and exploded views of replaceable modules. -
Page 18: Required Equipment
6. To reinstall, reverse the steps. Use a screwdriver with T-10 Torx tip to secure the eight screws. First insert and tighten the screws that are near the front edge of the instrument, then insert and tighten the screws that are near the rear edge of the instrument. Tighten to 0.65 N·m. 3 Series MDO Mixed Domain Oscilloscope Service Manual... -
Page 19: Remove Handle
Se Steps: Remove the grill and rear case using the following steps: 1. Use a screwdriver with T-10 Torx tip to remove the six screws from the back of the rear case. 3 Series MDO Mixed Domain Oscilloscope Service Manual... -
Page 20: Remove Handle Hub Assembly
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. • Remove the rear grill. See steps 1 - 3 in Remove rear grill and case. 3 Series MDO Mixed Domain Oscilloscope Service Manual... -
Page 21: Remove Rear Chassis Assembly
1. Use a screwdriver with a with T-10 Torx tip to remove the 16 screws securing the rear chassis to the front chassis. a. Remove four screws from the top and bottom of the rear chassis. b. Remove four screws from the left and right side of the rear chassis. 3 Series MDO Mixed Domain Oscilloscope Service Manual... -
Page 22: Remove The Main Fan Assembly
• Remove rear chassis assembly Steps: 1. Use a T-10 Torx screwdriver to remove the four screws from the main fan assembly. 3 Series MDO Mixed Domain Oscilloscope Service Manual... -
Page 23: Remove The Ac Line Filter
• Remove rear chassis assembly. Steps: 1. Remove the conductive tape (253-0594-XX) from the top of the AC linefilter. Save the conductive tape for reassembly. Only reuse the conductivetape once. 3 Series MDO Mixed Domain Oscilloscope Service Manual... -
Page 24: Figure 3: Ac Line Filter Cable Connections
3. Disconnect the line input cable from the power supply. Figure 3: AC line filter cable connections 4. Use a T-10 Torx screwdriver to remove the two screws securing the line filter to the outside of the rear chassis. 3 Series MDO Mixed Domain Oscilloscope Service Manual... -
Page 25: Remove The Power Supply Assembly
Remove the main fan assembly Steps: Use the following steps to remove the power supply assembly from the rear chassis. 1. Disconnect the cables connecting the power supply to the mezzanine board and AC line filter. 3 Series MDO Mixed Domain Oscilloscope Service Manual... -
Page 26: Remove The I/O Board
5. To reinstall, reverse the steps. Tighten all T-10 Torx screws to 0.65 N·m when reinstalling. Install new tie down straps (zip ties) if you removed them during disassembly. Remove the I/O board Use this procedure to remove and replace the I/O board. Prerequisites: 3 Series MDO Mixed Domain Oscilloscope Service Manual... - Page 27 4. Use a T-10 Torx screwdriver to remove the two screws securing the I/O board to the bottom of the rear chassis. 5. Slide the I/O board out from the rear chasis. 6. To reinstall, reverse the steps. Tighten the T-10 Torx screws to 0.65 N·m when reinstalling. 3 Series MDO Mixed Domain Oscilloscope Service Manual...
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Page 28: Remove Front-Panel Knobs
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 29: Equipment Required
V test point is on the upper right-hand corner of the board. Troubleshooting flow chart Follow the troubleshooting flow chart to determine the action for a fault condition. Figure 5: Primary troubleshooting tree 3 Series MDO Mixed Domain Oscilloscope Service Manual... -
Page 30: Figure 6: Ac Power Supply Troubleshooting Procedure
Maintenance Figure 6: AC power supply troubleshooting procedure 3 Series MDO Mixed Domain Oscilloscope Service Manual... -
Page 31: Instrument Self Tests
Utility > Self Test. Select a test mode and run the self tests. If you continue to get errors on one or more tests, you will need to return the instrument to your nearest Tektronix Service Center for repair. -
Page 32: After Power Supply Module Replacement
Specifications and Performance Verification manual (Tektronix part number 077-1499-XX). Download this manual from the Tektronix Web site (www.tek.com/manuals). If the instrument fails the Performance Verification tests, it must be returned to a Tektronix Service Center for adjustment. 3 Series MDO Mixed Domain Oscilloscope Service Manual... -
Page 33: Replaceable Parts
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 34: Rear Case
An item name is separated from the description by a colon (:). Because of space limitations, an item name may sometimes appear as incomplete. Use the U.S. Federal Catalog handbook H6-1 for further item name identification. Rear case Figure 8: Rear case exploded view 3 Series MDO Mixed Domain Oscilloscope Service Manual... -
Page 35: Table 6: Rear Case
SCREW, MACHINE, M3X0.5X10 FLAT HEAD, STL, TORX 10 065-1047-XX MODULE ASSY:SERVICE REPLACEMENT KIT; REAR FLIP FEET; 3 & 4 SERIES (QTY 2 IDENTICAL) 202-0579-XX CASE, REAR, ASSEMBLY. INCLUDES: PLASTIC CASE, PLASTIC TRIM, and WRAP LABELS 3 Series MDO Mixed Domain Oscilloscope Service Manual... -
Page 36: Rear Chassis
DBA, 92 MM X 92 MM X 25 MM, SAFETY CONTROLLED GROMMET, FAN MOUNT, NOISE DAMPING 348-2082-XX 407-6149-XX BRACKET, FAN 441-2911-XX CHASSIS, REAR (a new Rear I/O Label needs to be installed when replacing the rear chassis; order separately) Table continued… 3 Series MDO Mixed Domain Oscilloscope Service Manual... - Page 37 POWER SUPPLY; AC-DC; 90-264 VAC 45-66 HZ, 100-132 VAC 360-440 HZ IN; +12 V@12 A5, +5 V@1 A, 150 W, OUT; PS_ON#, PWR_GOOD SIGNALS; SAFETY CONTROLLED SCREW, MACHINE, M3X0.5X6MM PAN HEAD, TORX T10 211-1584-XX 878-1624-XX ASSEMBLY, CIRCUIT BOARD, I/O BOARD 3 Series MDO Mixed Domain Oscilloscope Service Manual...
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Page 38: Front Chassis
Return the instrument to Tektronix for service. 351-1159-XX GUIDE, MSO PROBE, BLACK Return the instrument to Tektronix for service. ASSEMBLY, CIRCUIT BOARD, MEZZANINE 878-1623-XX Return the instrument to Tektronix for service. Table continued… 3 Series MDO Mixed Domain Oscilloscope Service Manual... - Page 39 CIRCUIT BOARD ASSY; AFE BOARD 500MHZ, 4 CH MODEL, WITH 870-1648-XX SHIELD 337-4590-XX Return the instrument to Tektronix for service. 878-1625-XX ASSEMBLY, CIRCUIT BOARD, MAIN BOARD Return the instrument to Tektronix for service. SCREW MACHINE, M3 X 6 211-1584-XX 3 Series MDO Mixed Domain Oscilloscope Service Manual...
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Page 40: Front Panel And Display
Note: None of the components listed are user-replaceable except for front panel knobs and the front panel label. Return the instrument to your nearest Tektronix Service Center to repair or replace any internal components or assemblies in this diagram. Table 9: Front panel and display Fig. - Page 41 LABEL, BLACKOUT, EMAT OVERLAY Return the instrument to Tektronix for service. 065-1043-XX SERVICE REPLACEMENT KIT; 2CH FRONT CASE ASSY, 3 SERIES MDO (PLASTIC AND LABELS) Return the instrument to Tektronix for service. SERVICE REPLACEMENT KIT; 4CH FRONT CASE ASSY, 3 SERIES...
- Page 42 MARKER, IDENTIFICATION; LABEL MDO, 2 CHANNEL, 200 MHZ 335-4193-XX MARKER, IDENTIFICATION; LABEL MDO, 2 CHANNEL, 350 MHZ 335-4194-XX MARKER, IDENTIFICATION; LABEL MDO, 2 CHANNEL, 500 MHZ 335-4195-XX MARKER, IDENTIFICATION; LABEL MDO, 2 CHANNEL, 1 GHZ 335-4196-XX 3 Series MDO Mixed Domain Oscilloscope Service Manual...
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