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Tektronix TAS 465 Service Manual

Analog oscilloscope
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Service Manual
TAS 465
Analog Oscilloscope
B020100 and Above
070-9403-00
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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Summary of Contents for Tektronix TAS 465

  • Page 1 Service Manual TAS 465 Analog Oscilloscope B020100 and Above 070-9403-00 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...
  • Page 2 Copyright E Tektronix, Inc. 1995. All rights reserved. Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes that in all previously published material. Specifications and price change privileges reserved. Printed in the U.S.A.

  • Page 3: Table Of Contents

    ..........TAS 465 Service Manual...
  • Page 4 Table of Contents Theory of Operation Circuit Description ......... . Logic Conventions .
  • Page 5 ......5 16 Vertical Gain Adjust (Cabinet On) ......5 18 TAS 465 Service Manual...
  • Page 6 ......... Tektronix Service .
  • Page 7 . . . Component Locator Diagrams ......Replaceable Mechanical Parts List TAS 465 Service Manual...
  • Page 8 Table of Contents Contents...

  • Page 9: List Of Figures

    ......5 14 Figure 5 11: Adjusting Vertical Gain and Centering ....5 15 TAS 465 Service Manual...
  • Page 10 List of Figures Figure 5 12: High Frequency Step Response Test Setup ..5 16 Figure 5 13: Attenuator Compensation Test Setup ....5 17 Figure 5 14: Display Driver Board Adjustment Locations .
  • Page 11 ........10 12 TAS 465 Service Manual...
  • Page 12 List of Figures Contents...

  • Page 13: List Of Tables

    ......4 24 Table 5 1: Adjustments and Dependencies ..... TAS 465 Service Manual...
  • Page 14 List of Tables Table 6 1: Relative Susceptibility to Static Discharge Damage ..Table 6 2: External Inspection Check List ..... . . Table 6 3: Tools Required for Module Removal .

  • Page 15: Safety Summary

    DANGER indicates a personal injury hazard immediately accessible as one reads the marking. This symbol appears in manuals: Static Sensitive Devices These symbols appear on equipment: DANGER Protective ATTENTION High Voltage ground (earth) Refer to terminal manual xiii TAS 465 Service Manual...

  • Page 16: Specific Precautions

    Safety Summary Specific Precautions Observe all of the following precautions to ensure your personal safety and to prevent damage to either the TAS 465 Analog Oscilloscope or equipment connected to them. Do Not Perform Service While Alone Do not perform internal service or adjustment of this product unless another person capable of rendering first aid and resuscitation is present.
  • Page 17 Do not operate the TAS 465 Oscilloscope in an atmosphere of explosive gasses. Electric Overload Never apply a voltage to a connector on the TAS 465 Oscilloscope that is outside the range specified for that connector. TAS 465 Service Manual...
  • Page 18 Safety Summary Safety...

  • Page 19: Preface

    Preface This is the Service Manual for the TAS 465 Analog Oscilloscope. This manu al provides you with both service and limited operation information. Use the Introduction section to learn what the TAS 465 Analog Oscilloscope can do and about the available options and accessories.

  • Page 20: Related Manuals

    Related Manuals Other documentation for the TAS 465 Analog Oscilloscope include: The Reference (Tektronix part number 070 8522 XX) gives you a quick overview of how to operate your TAS 400 Series Analog Oscilloscopes. The Instruction manual (Tektronix part number 070 8523 XX) contains detailed operating information and module level service information.

  • Page 21: Product Description

    Product Description Your Tektronix TAS 465 Analog Oscilloscope is a superb tool for processing and displaying electrical signals. Its performance addresses the needs of both benchtop and portable applications with the following features: 100 MHz minimum bandwidth Two channel input...

  • Page 22: User Interface

    Product Description The features of the TAS 465 Analog Oscilloscope are briefly described here to help get you acquainted with the operating systems. User Interface This oscilloscope uses a combination of front panel buttons, knobs, and on screen menus to control its many functions. The front panel controls are grouped according to function: vertical, horizontal, trigger, and special.

  • Page 23: Vertical System

    Once you have set up to take your measurements, the cursors can help you take those measurements quickly. Cursors The TAS 465 Oscilloscope has two types of cursors for taking measure ments on the displayed waveforms: delta (difference) and absolute. The General Purpose Knob controls the placement of the cursors. The TOGGLE button selects which cursor is active.
  • Page 24 Product Description The bar cursors remain displayed even if you change the function of the General Purpose Knob. This allows you to use them as reference points or markers to easily identify if measurement signals remain within the parame ters set by the cursors. Remove the cursor display by turning the cursor measurement off.

  • Page 25: Nominal Traits

    Nominal Traits This subsection contains a collection of tables that list the various nominal traits that describe the TAS 465 Analog Oscilloscope. Included are electrical and mechanical traits. Nominal traits are described using simple statements of fact such as Two, both identical"...

  • Page 26: Table 1 2: Nominal Traits

    Nominal Traits Table 1 2: Nominal Traits Time Base System Name Description Main Seconds/Division Range 20 ns/div to 0.5 s/div. The seconds/division ranges from 20 ns/div to 0.5 s/div in a 1-2-5 sequence of settings. The X10 magnifier extends the maximum sweep speed to 2 ns/div.
  • Page 27 Voltage Range Fuse (250 V) Fuse (250 V) UL 198.6 IEC 127 (5  20 mm) (5  20 mm) 132 VAC 3 A Fast. 3.15 A Fast. 250 VAC 3 A Fast. 1.5 A Fast. TAS 465 Service Manual...

  • Page 28: Table 1 9: Nominal Traits Mechanical

    Construction Material Chassis parts constructed of aluminum alloy; front panel con structed of plastic laminate; circuit boards constructed of glass lami nate. Tektronix Blue textured paint finish on an aluminum cabinet. Plastic parts are polycarbonate. Weight of rackmounted instrument and...

  • Page 29: Warranted Characteristics

    Warranted Characteristics This subsection lists the various warranted characteristics that describe the TAS 465 Analog Oscilloscope. Included are electrical and environmental characteristics. Warranted characteristics are described in terms of quantifiable performance limits which are warranted. This subsection lists only warranted characteristics.
  • Page 30 Table 1 10: Warranted Characteristics Vertical Deflection System (Cont.) Name Description The limits are as follows: TAS 465 Bandwidth at the probe tip, using the Standard Accessory Probe using the Standard Accessory Probe Condition Bandwidth +15_ C to +35_ C 100 MHz.
  • Page 31 ±(0.5% of reading + 5% of 1 division of the Main sweep + 25 ns). Point to Start of Delayed Sweep Delta Delay Accuracy ±(0.5% of reading + 5% of 1 division of the Main sweep + 10 ns). 1 11 TAS 465 Service Manual...
  • Page 32 Warranted Characteristics Table 1 12: Warranted Characteristics Triggering System Name Description The limits are as follows: TAS 465 Edge Type Trigger Sensitivity, DC Coupled iti it DC C Trigger Source Sensitivity Internal, Any Channel 0.30 division from DC to 25 MHz, increasing to 1 div at 150 MHz.
  • Page 33 ±(1.6% of reading + 2% of one vertical division + HF display errors). Table 1 15: Warranted Characteristics XY Operation Name Description XY Accuracy ±4%. X Bandwidth DC to at least 3 MHz. Phase Difference Between X and Y ±3_, DC to 150 kHz. Amplifiers 1 13 TAS 465 Service Manual...
  • Page 34 Canadian Standards CSA Category Certified Electronic Association (CSA) Development and Test Equipment, CSA 22.2 no. 231. Self Certification International Self certified by Tektronix to Electro Technical Commission comply with IEC 348 (IEC) recommendation. Temperature: Operating and Operating: -10_ C to +55_ C.

  • Page 35: Typical Characteristics

    Typical Characteristics This subsection contains tables that lists the various typical characteristics that describe the TAS 465 Analog Oscilloscope. Typical characteristics are described in terms of typical or average performance. Typical characteristics are not warranted. This subsection lists only typical characteristics. A list of warranted charac teristics starts on page 1 9.

  • Page 36: Table 1 20: Typical Characteristics

    Typical Characteristics Table 1 20: Typical Characteristics Triggering System Name Description The typical sensitivities are as follows: TAS 465 Edge Type Trigger Sensitivity, Not DC Coupled Not DC Coupled Trigger Source Typical Signal Level for Stable Triggering Noise Reject 1.2 divisions from DC to 25 MHz, in creasing to 2.2 divisions at 150 MHz.

  • Page 37: Table 1 21: Typical Characteristics

    Battery life can be reduced when the instrument is stored for extended time above +50_ C. Retained data may be lost when stored for extended time below 0_ C. 1 17 TAS 465 Service Manual...
  • Page 38 Typical Characteristics 1 18 Specifications...

  • Page 39: Installation And Power On

    Before you begin using the TAS 465 Analog Oscilloscope, perform this procedure to properly install and power it on. 1. Check that you have the proper electrical connections. The TAS 465 Analog Oscilloscope requires 90 to 132 VAC or 180 to 250 VAC continuous range from 48 Hz to 440 Hz.

  • Page 40: Figure 2 2: Fuse Compartment

    Installation and Power On Spare Fuse Grasp the Fuse Drawer and Pull Straight Out Pop the Fuse Up from the Bottom of the Drawer Figure 2 2: Fuse Compartment 5. Be sure you have the appropriate operating environment. Specifications for temperature, relative humidity, altitude, vibrations, and emissions are in Section 1, Specifications.

  • Page 41: Quick Start

    Quick Start This section helps you get acquainted with basic controls and operating systems of the TAS 465 Analog Oscilloscope once you have power applied. Selecting and The TAS 465 Oscilloscope has two input channels. You can display the channels separately or simultaneously. The following steps demonstrate Deselecting Input how to select and deselect channels for display.

  • Page 42: Connecting A Signal

    CH 1 and CH 2. The probes you use for taking measure ments should only be those supplied with the TAS 465 Oscilloscope. Con necting signals to the TAS 465 Oscilloscope is also possible with the use of 50 W coaxial cables.

  • Page 43: Compensating The Probe

    Figure 2 4: Probe Compensation Signal Displayed after AUTOSET Compensating the Passive probes require compensation to ensure maximum distortion free input to the TAS 465 Oscilloscope. Before taking any measurements using a Probe probe, first check the compensation of the probe and adjust it to match the channel inputs.
  • Page 44 Quick Start 3. Select the appropriate input channel, channel 1 or channel 2, by press ing the CH 1 or CH 2 front panel button. 4. With the probe attached between an input channel and the probe com pensation output of the oscilloscope, press the AUTOSET button on the front panel.

  • Page 45: Figure 2 6: How Probe Compensation Affects Signals

    11. Adjust the low frequency compensation adjustment, located in the probe body, for the best possible square wave. See Figure 2 7 for the location of the low frequency adjustment. Low frequency Adjustment Figure 2 7: Location of Probe Head Adjustment TAS 465 Service Manual...

  • Page 46: Menu Map

    Quick Start Menu Map Figure 2 8 is a map of the menus to help you locate menu driven functions and their available settings. Refer to the Instruction manual for operating information about each menu. Main Mode Auto Select LED on Auto Level VERTICAL Normal...

  • Page 47: Circuit Description

    Circuit Description This section describes the electrical operation of the Tektronix TAS 465 Analog Oscilloscope. Refer to the schematics in the Diagrams section as necessary. Logic Conventions This manual refers to digital logic circuits with standard logic symbols and terms. Unless otherwise stated, all logic functions are described using the positive logic convention: the more positive of the two logic levels is the high (1) state and the more negative level is the low (0) state.

  • Page 48: Figure 3 1: Block Diagram

    Circuit Description DISPLAY CONTROL BOARD 2 PINS 2 PINS 5 PINS PROCESSOR BOARD 5 PINS 16 PINS 16 PINS 40 PINS FRONT PANEL BOARD BEZEL PROBE COMP BUTTON BOARD 10 PINS 10 PINS 5 PINS 115/230V 5 TERMINATIONS LV & HV POWER SUPPLY BOARD 12 TERMINATIONS 2 PINS 2 TERMINATIONS...
  • Page 49 DISPLAY DRIVER BOARD EXT TRIG 2 PINS J403 VERTICAL DEFLECTION DL68 2 PINS 2 PINS 40 PINS 5 PINS 23 PINS 23 TERMINATIONS 4 PINS 13 PINS EXT Z AXIS HORIZONTAL DEFLECTION 2 PINS HIGH VOLTAGE TAS 465 Service Manual...

  • Page 50: Analog Board

    Circuit Description Analog Board A signal enters the oscilloscope through a probe connected to a BNC on the A1 Analog board. Attenuators A1 The attenuator hybrids AT401 and AT402, and the vertical preamplifier IC, select the input coupling, attenuation factor, variable gain, and the invert function.

  • Page 51: Rom/Ram Subsystem A5

    ECL. These lines were converted to CMOS by using two transistors and a couple of resistors. The EXTTRIG lines going to the analog board need to be ECL. These lines were converted using three resistors each. TAS 465 Service Manual...

  • Page 52: Display Assembly

    Circuit Description Display Assembly All information (waveforms, text, and cursors) is displayed by the A3 Display Driver board. It generates the high voltages necessary to drive the CRT. It also contains the vertical and horizontal amplifier circuitry. Vertical Output A3 The vertical output amplifier provides the final stage of amplification of the vertical signal.

  • Page 53: Menu Switches A4

    There are five LEDs (light emitting diodes) on the front panel which are connected between the outputs of an 8 bit LED latch U202 and a pull up resistor to +5 V. When a particular LED needs to be turned on or off, the TAS 465 Service Manual...

  • Page 54: Switches A4

    Circuit Description front panel processor converts the LED identification received from the host processor to the correct LED address on the latch (U202) and changes the state of the LED. Switches A4 The front panel switches and menu switches are arranged in an array of 9 rows and 8 columns.

  • Page 55: General Instructions

    The Temperature Compensation Calibrations allow you to adjust the display accuracy of the oscilloscope. Using the The Performance Tests confirm that the TAS 465 Oscilloscope performs as specified. The Performance Tests begin on page 4 13. Completing these Performance Tests tests takes approximately two hours and requires suitable test equipment.

  • Page 56: Conventions

    General Instructions Conventions The procedures in this section provide the following information: Title of test Equipment required (if applicable) Procedure Where instructed to use a front panel control or select from a menu, the name appears in boldface type. For example, press VERTICAL MENU; then set CPLG to DC."...

  • Page 57: Brief Performance Checks

    Brief Performance Checks This section contains three brief procedures: two that verify the operation of the TAS 465 Analog Oscilloscope and one to perform a brief calibration to compensate for temperature variances. The Power On Self Tests use internal routines (performed at each power on) to confirm basic functionality and proper adjustment.

  • Page 58: Functional Tests Prerequisites

    Brief Performance Checks Functional Tests Prerequisites 1. Power on the oscilloscope and allow a 20 minute warm up before per forming this procedure; adjust the READOUT control to display the readout and the INTENSITY control to display waveforms. 2. Disable the dual delay with the following menu selections. a.

  • Page 59: Verify The Input Channels

    Select AC coupling, press the SET LEVEL TO 50% button, and verify that the waveform is centered at about the center horizontal graticule line. Select GND coupling and verify that a straight line is displayed (no waveform). TAS 465 Service Manual...

  • Page 60: Verify The Alt/Chop And Add Functions

    Brief Performance Checks 7. Return the coupling to DC and press the CLEAR MENU button. 8. Repeat this procedure until all input channels are verified. Verify the Alt/Chop and Add Functions 1. Install the probe on CH 1. 2. Press the WAVEFORM OFF button until the readout indicates channel 1 is the only selected channel.

  • Page 61: Verify The Trigger System

    14. Set MAIN to On and DELAY to Off. Verify the Trigger System 1. Press the WAVEFORM OFF button until the readout indicates channel 1 is the only selected channel. 2. Press the AUTOSET button. TAS 465 Service Manual...
  • Page 62 Brief Performance Checks 3. Set the sec/div scale to 1 ms. 4. Press the TRIGGER MENU button and set MODE to Auto. 5. Verify that the main trigger is operational, confirming that the following statements are true: Rotating the trigger LEVEL control changes the main trigger level readout.

  • Page 63: Verify The External Trigger

    TOGGLE button selects the function of the General Purpose Knob. 4. Use a combination of the TOGGLE button and the General Purpose Knob to position the two dots eight divisions apart, centered horizontally (see Figure 4 3). TAS 465 Service Manual...

  • Page 64: Figure 4 3: Horizontal Adjustments (One)

    Brief Performance Checks Gain and Position Adjustment Dots Eight Divisions Apart, Centered Horizontally Toggle Between Gain and Position Adjustment Figure 4 3: Horizontal Adjustments (One) 5. Select Done when you have the appropriate display. 6. Again, use a combination of the TOGGLE button and the General Pur pose Knob to position the two dots eight divisions apart, centered horizontally (see Figure 4 3).

  • Page 65: Vertical Signal Path

    The Vertical Signal Path routine takes about one minute to complete. When finished, a pass or failed status will appear on the screen. 6. Press Done to exit the routine, displaying a Calibration Finished mes sage. 7. Press the CLEAR MENU button. TAS 465 Service Manual 4 11...
  • Page 66 Brief Performance Checks 4 12 Performance Verification...

  • Page 67: Performance Tests

    Performance Tests This subsection contains procedures to verify that the TAS 465 Analog Oscilloscope performs as warranted. The procedures are arranged in three logical groupings: Vertical Checks, Horizontal Checks, and Trigger Checks. They check all the characteristics that are designated as checked in Section 1, Specifications. (The checked characteristics appear in boldface type under Warranted Characteristics in Section 1.)

  • Page 68: Table 4 1: Required Test Equipment

    Table 4 1: Required Test Equipment Item Number and Minimum Requirements Example Purpose Description Attenuator, 5X Ratio: 5X; Impedance 50 W; Tektronix part number Signal attenuation Connectors: female BNC input, 011-0060-02 male BNC output Attenuator, 10X Ratio: 10X; Impedance 50 W; Tektronix part number...

  • Page 69: Vertical System Checks

    11. Use the General Purpose Knob and TOGGLE button to precisely align the cursors to the signal peaks. 12. Check the Displayed Signal Accuracy and Volts Readout Accuracy while setting the Volts/Div Scale and the Input Amplitude given in Table 4 2. TAS 465 Service Manual 4 15...

  • Page 70: Check Trigger Level Accuracy

    Performance Tests Table 4 2: DC Gain and Delta Volts Accuracy Volts/Div Input Displayed Delta Volts Scale Amplitude Signal Accuracy Readout Accuracy 2 mV 10 mV 4.87 to 5.13 div 9.80 mV to 10.2 mV 5 mV 20 mV 3.9 to 4.1 div 19.6 mV to 20.4 mV 10 mV 50 mV...

  • Page 71: Check Dc Coupling Bandwidth

    (item 5), and one 50 W termination (item 3). 1. Display the channel to be verified, turning all others off. 2. Connect the output of the sine wave generator to the channel to be verified as shown in Figure 4 8. TAS 465 Service Manual 4 17...

  • Page 72: Figure 4 8: Bandwidth Test Setup

    While confirming the Display Amplitude remains greater than the minimum number of divisions, increase the signal generator fre quency to 100 MHz. Table 4 3: DC Coupled Bandwidth Display Amplitude Volts/Div 50 kHz TAS 465 Scale Reference Amplitude To 100 MHz 2 mV 6 division w4.2 division...

  • Page 73: Check X Axis Gain

    7. Press the HORIZONTAL MENU button and set XY to On. 8. Check that the amplitude of the X axis signal is 4.8 to 5.2 divisions. 9. Set XY to Off. 10. Disconnect the test setup from the oscilloscope. TAS 465 Service Manual 4 19...

  • Page 74: Horizontal System Checks

    Performance Tests Horizontal System These procedures check those characteristics that relate to the horizontal system and are listed as checked under Warranted Characteristics in Checks Section 1, Specifications. Check Time Base and Time Cursor Accuracy Equipment Required: One time marker generator (item 9), one precision coaxial cable (item 5), and one 50 W termination (item 3).

  • Page 75: Table 4 4: Time Base And Cursor Accuracies (Mag Off)

    20. Check that the Time Mark to Graticule Accuracy over the center eight divisions are within the limits shown for each sec/div scale listed in Table 4 4 (disregard the Time Cursor Readout Accuracy column). TAS 465 Service Manual 4 21...

  • Page 76: Check Dual Delay Accuracy

    Performance Tests 21. Set MAIN to On. 22. Set the main sec/div scale to 20 ns. 23. Set MAIN to Off. 24. Press the MAG button, turning magnification on. 25. Set the time mark generator for 5 ns markers. 26. Set the volts/div scale to 200 mV. 27.

  • Page 77: Figure 4 11: Dual Delay Test Setup

    Press the TOGGLE button to assign the General Purpose Knob to the second intensified zone if necessary. 19. Check the Dual Delay Accuracy Reading for each time marker pair listed in Table 4 6. TAS 465 Service Manual 4 23...

  • Page 78: Trigger System Checks

    Performance Tests Table 4 6: 500 ms Dual Delay Accuracy Time Markers Intensified Dual Delay Accuracy Reading Limits Second and third 473 ms to 527 ms Second and fourth 970 ms to 1.03 ms Second and sixth 1.97 ms to 2.03 ms Second and tenth 3.96 ms to 4.04 ms 20.

  • Page 79: Figure 4 12: Trigger Sensitivity Test Setup (One)

    12. Set the delay time to 15 ns using the General Purpose Knob. 13. Set DELAY to Off. 14. Adjust the sine wave generator amplitude for a three division display. 15. Add a 10X attenuator to the test setup as shown in Figure 4 13. TAS 465 Service Manual 4 25...

  • Page 80: Figure 4 13: Trigger Sensitivity Test Setup (Two)

    Performance Tests Sine Wave Generator 50 W Terminations Dual input Coupler Precision Cable 10X Attenuator Figure 4 13: Trigger Sensitivity Test Setup (Two) 16. Press the SET LEVEL TO 50% button and confirm a stable display. 17. Press the TRIGGER MENU button and set SLOPE to Falling. 18.

  • Page 81: Figure 4 14: Trigger Sensitivity Test Setup (Three)

    Performance Tests High Frequency The following steps check trigger sensitivity at 150 MHz (TAS 465). 1. Remove the 10X attenuator from the test setup. Reconnect as shown in Figure 4 14. Sine Wave Generator 50 W Terminations Dual input Precision Cable...
  • Page 82 Performance Tests 9. Set the volts/div scale to 50 mV. 10. Adjust the sine wave generator amplitude for a one division display. 11. Set SRC to Ch1. 12. Press the SET LEVEL TO 50% button and confirm a stable display. 13.

  • Page 83: Video Trigger Sensitivity

    Set SLOPE to Falling 9. Confirm a stable display of the video field. 10. Set MODE to Video Field <even>. 11. Confirm a stable display of the video field. 12. Disconnect the test setup from the oscilloscope. TAS 465 Service Manual 4 29...
  • Page 84 Performance Tests 4 30 Performance Verification...

  • Page 85: Adjustment Procedures

    Adjustment Procedures This section contains information needed to adjust the TAS 465 Analog Oscilloscope. Description The Adjustment Procedures are divided into two parts: General information about adjusting the oscilloscope Written procedures for calibrating the oscilloscope Purpose Use these procedures to return the oscilloscope to confor mance with its Warranted Characteristics as listed in Section 1, Specifica tions.

  • Page 86: Equipment Required

    Figure 5 1: Location of Boards for Adjustments Equipment Required These procedures use external, traceable signal sources to adjust the TAS 465 Oscilloscope. Table 4 1 on page 4 14 lists all the test equipment required for these procedures. Adjustment Procedures...

  • Page 87: Performing The Adjustment Procedures

    Some adjustments depend on the successful prior completion of other adjustments. Generally, the procedures should be performed in the order shown under Complete Adjustment. Some adjustments do not depend on completion of other adjustments. Table 5 1 lists the adjustments and their dependencies. TAS 465 Service Manual...

  • Page 88: Adjustment Instructions

    Adjustment Procedures Table 5 1: Adjustments and Dependencies Adjustment Prior Completion Requirements Power Supply None CRT Adjustment None Low Frequency Output Com None pensation Factory Horizontal Cal CRT Adjustment Factory Vertical Cal Low Frequency Output Compensation and Factory Horizontal Cal High Frequency Step Response Factory Vertical Cal Attenuator Compensation...

  • Page 89: Crt Adjustments

    12. Set XY to Off. 13. Connect the output of the time mark generator to the CH 1 input as shown in Figure 5 2. Time Mark Generator 50 W Termination Precision Cable Figure 5 2: CRT Adjustments Calibration Setup TAS 465 Service Manual...

  • Page 90: Low Frequency Output Compensation

    Adjustment Procedures 14. Set the time mark generator for 1 ms markers. 15. Set the INTENSITY control to view the display. 16. Press the VERTICAL MENU button and set CPLG to DC 17. Press the SET LEVEL TO 50% button. 18.

  • Page 91: Figure 5 3: Low Frequency Output Compensation Calibration

    16. Position the channel 2 trace to the center vertical graticule line. 17. Set CPLG to AC. 18. Adjust R111 located on the Display Driver board for minimum vertical movement of the readout (over the entire graticule area). 19. Disconnect the test setup from the oscilloscope. TAS 465 Service Manual...

  • Page 92: Factory Horizontal Cal

    Adjustment Procedures Factory Horizontal Cal Equipment Required: One time mark generator (item 9), one precision coaxial cable (item 5), and one 50 W termination (item 3). Prerequisites: CRT adjustment procedure. NOTE To enable factory calibration on oscilloscopes with firmware version or above, remove jumper J205 (CAL-DIS) on the CPU board.

  • Page 93: Figure 5 4: Horizontal Adjustments (One)

    10. Use a combination of the TOGGLE button and the General Purpose Knob to center the single dot at the center of the screen (see Figure 5 5). Position Adjustment Center Dot Horizontally Toggle Dot Position Figure 5 5: Horizontal Adjustments (Two) TAS 465 Service Manual...

  • Page 94: Figure 5 6: Horizontal Adjustments (Three)

    Adjustment Procedures 11. Continue to press the TOGGLE button and adjusting the dot to center screen with the General Purpose Knob until the dot stays centered while pressing the TOGGLE button. 12. Select Done when you have the appropriate display. 13.

  • Page 95: Figure 5 7: Horizontal Output Calibration Setup

    25. Disconnect the test setup from the oscilloscope. 26. If you do not intend to proceed with Factory Vertical CAL, replace J205 (CAL-DIS) to lock out the calibration routine. (This jumper only works with firmware version and above.) 2.10 TAS 465 Service Manual 5 11...

  • Page 96: Factory Vertical Cal

    Adjustment Procedures CAUTION To prevent accidental loss of calibration, be sure the calibration lockout jumper (J205) is in place. If J205 is not in place, erroneous calibration constants can result if the calibration routine is acciden tally invoked and not properly completed. Factory Vertical Cal Equipment Required: One DC calibration generator (item 11), one preci sion coaxial cable (item 5), and one dual input coupler (item 7).

  • Page 97: Figure 5 8: Factory Vertical Calibration Setup

    This portion of the routine takes about one minute to complete. 12. Connect the DC calibration generator to the EXT TRIG input as shown in Figure 5 9. DC Calibration Generator Precision Cable Figure 5 9: External Trigger Calibration Setup TAS 465 Service Manual 5 13...

  • Page 98: Figure 5 10: Vertical Adjustments

    Adjustment Procedures 13. Set the DC calibration generator for 500 mVDC output. 14. Select Done when completed. 15. Set the DC calibration generator for 5 VDC output. 16. Select Done when completed. NOTE The following steps use both the General Purpose Knob and the TOGGLE button to make adjustments.

  • Page 99: High Frequency Step Response

    Prerequisites: Factory Vertical Cal adjustment procedure. 1. Display channel 1, turning all others off. 2. Connect the positive fast rise pulse output of the pulse generator to the CH 1 input as shown in Figure 5 12. TAS 465 Service Manual 5 15...

  • Page 100: Attenuator Compensation

    8. Adjust the vertical POSITION control and the generator pulse amplitude to obtain a 5 division, vertically centered, display. 9. TAS 465 Only Adjust R141 and C122 on the Display Driver board for flattest long term response of the pulse front corner.

  • Page 101: Figure 5 13: Attenuator Compensation Test Setup

    Set CPLG to DC Set VAR to Off Set INV to Off Set BW to Full Set the volts/div scale to 100 mV Position the channel 2 display approximately 0.5 divisions below the channel 1 display TAS 465 Service Manual 5 17...

  • Page 102: Vertical Gain Adjust (Cabinet On)

    Adjustment Procedures 12. Press the CH 1 button. 13. Adjust Ch 1 10X on the Analog board for the flattest response of the most positive portion of the channel 1 waveform. 14. Set the channel 1 volts/div scale to 1 V. 15.
  • Page 103 5.8 divisions with R112. 8. Slide the cabinet on the instrument and repeat this procedure until the cursor display matches the DVolts readout. Adjustment Complete The adjustment procedure is complete. Install the cabinet and rear cover. TAS 465 Service Manual 5 19...

  • Page 104: Figure 5 14: Display Driver Board Adjustment Locations

    Adjustment Procedures R321 R322 R323 R140 C121 R112 C122 R141 R154 R111 Figure 5 14: Display Driver Board Adjustment Locations 5 20 Adjustment Procedures...

  • Page 105: Figure 5 15: Analog Board Adjustment Locations

    Adjustment Procedures Ch1 10X Ch1 100X Ch2 10X Ch2 100X Figure 5 15: Analog Board Adjustment Locations TAS 465 Service Manual 5 21...

  • Page 106: Figure 5 16: Power Supply Adjustment Location

    Adjustment Procedures Figure 5 16: Power Supply Adjustment Location 5 22 Adjustment Procedures...

  • Page 107: Figure 5 17: Location Of J205 (Cal-Dis) On The Cpu Board

    Adjustment Procedures J205 (CAL-DIS) Figure 5 17: Location of J205 (CAL-DIS) on the CPU Board TAS 465 Service Manual 5 23...
  • Page 108 Adjustment Procedures 5 24 Adjustment Procedures...

  • Page 109: Maintenance Information

    Procedures that help isolate problems to a module. Before Servicing This manual is for servicing of the TAS 465 Analog Oscilloscope. To prevent injury to yourself or damage to the oscilloscope, do the following before you attempt service. Be sure you are a qualified service person.

  • Page 110: Repair Or Calibration Service

    Repair or Calibration Service Tektronix offers several types of service contracts that you may purchase to tailor repair and/or calibration of your TAS 465 Analog Oscilloscope to fit your requirements. Refer to the Warranty Plus Service Options, page 7 1, for a list of the avail able service contracts for the TAS 465 Analog Oscilloscope.

  • Page 111: Table 6 1: Relative Susceptibility To Static Discharge Damage

    6 = 600 to 800 V 2 = 200 to 500 V 7 = 400 to 1000 V (est.) 3 = 250 V 8 = 900 V 4 = 500 V 9 = 1200 V 5 = 400 to 600 V TAS 465 Service Manual...
  • Page 112 Maintenance Information Maintenance...

  • Page 113: Inspection And Cleaning

    Inspection and Cleaning Inspection and Cleaning describes how to inspect and clean the TAS 465 Analog Oscilloscope. Inspection and cleaning are preventive maintenance. Preventive maintenance, when done regularly, may prevent oscilloscope malfunction and enhance its reliability. Preventive maintenance consists of visually inspecting and cleaning the oscilloscope and using general care when operating it.

  • Page 114: Inspection Exterior

    Inspection and Cleaning Inspection Exterior Inspect the outside of the oscilloscope for damage, wear, and missing parts. Use Table 6 2 as a guide. Oscilloscopes that appear to have been dropped or otherwise abused should be checked thoroughly to verify correct opera tion and performance.

  • Page 115: Cleaning Procedure Interior

    3. Remove any static charge that may have accumulated by holding the shield in a deionized air flow. 4. Install the shield as described in the removal and replacement proce dures beginning on page 6 28. TAS 465 Service Manual...
  • Page 116 Inspection and Cleaning Maintenance...

  • Page 117: Removal And Installation Procedures

    Failure to do so could cause serious injury or death. Cable Removal Cables are partially or completely removed in the course of removing a board or module they plug into. TAS 465 Service Manual...

  • Page 118: General Instructions

    Removal and Installation Procedures General Instructions READ THESE GENERAL INSTRUCTIONS BEFORE REMOVING A MODULE. First read over the Summary of Procedures that follows to under stand how the procedures are grouped. Then read Equipment Required for a list of the tools needed to remove and install modules in this oscilloscope.

  • Page 119: Table 6 3: Tools Required For Module Removal

    Flat bladed spudger A non metallic probe like tool with a flat bladed tip. Used to remove the front panel trim and front module. Slip jaw pliers Used for removing the front feet from the cabinet. 6 11 TAS 465 Service Manual...

  • Page 120: Figure 6 2: Cabinet And Front Panel Mounted Modules

    Removal and Installation Procedures Line Cord Rear Cover Cabinet Mounting Screw Front Line Fuse Foot (2) Handle Assembly Menu Flex Circuit Menu Button Elastomer Menu Button Trim Ring Front Cover (Optional) A4 Front Panel Assembly Front Panel Knobs & Shafts Figure 6 2: Cabinet and Front Panel Mounted Modules 6 12 Maintenance...

  • Page 121: Figure 6 3: Internal Modules

    Mounting Screw Power Supply CPU Board Front CRT Bracket Implosion Shield Mounting Screw Display Board Display Control Board Mounting Screw High Voltage Cover Attenuator Assembly Mounting Screw Attenuator Shield Figure 6 3: Internal Modules 6 13 TAS 465 Service Manual...

  • Page 122: Line Cord And Line Fuse

    Removal and Installation Procedures Power Supply to CPU Power Supply to Display Board Display Control Board Display Board to to Front Panel Analog Board Display Control Board Display Board to to Display Board Analog Board CPU to Analog Board CPU to Front Panel Power Supply to Display Board Figure 6 4: Cables and Cable Routing...

  • Page 123: Line Fuse

    Use the following procedures to remove and install front panel knobs and shafts. and Shafts Prepare the oscilloscope by setting it bottom side down on the work surface and facing the front side toward you. 6 15 TAS 465 Service Manual...

  • Page 124: Removing Front Panel Knobs And Shafts

    Removal and Installation Procedures Removing Front Panel Knobs and Shafts 1. Remove any knob by pulling it straight out from the front panel slightly. This will create some clearance between the base of the knob and the front panel to create some clearance between the base of the knob and the front panel.

  • Page 125: Feet, Rear Cover, And Cabinet

    (if available) and then position the oscillo Cabinet scope as indicated in Figure 6 7. Mounting Screws (4) Mounting Screw Front Foot: Rotate and remove. Figure 6 7: Rear Cover, Cabinet, and Feet Removal 6 17 TAS 465 Service Manual...

  • Page 126: Rear Cover

    Removal and Installation Procedures Rear Cover 1. Position the oscilloscope as indicated in Figure 6 7. 2. Use the screwdriver to remove the four T 15 Torx screws that secure the rear cover to the oscilloscope. 3. Lift off the rear cover. Do these steps in reverse order to install the rear cover.

  • Page 127: Menu Buttons And Elastomer

    3. Position the power button in line with the front panel power button opening. 4. Slide the front trim onto the instrument, ensuring that all four flex locks engage. 5. If installing a new front trim, apply the appropriate front trim label. 6 19 TAS 465 Service Manual...

  • Page 128: Installing The Emi Gaskets

    Removal and Installation Procedures Trim Ring: To remove, grasp its back edge and press up on its two tab locks. Flex the trim ring upward; then pull it forward. Repeat for the bottom edge of trim ring. Tab Lock Trim Ring Menu Button Menu Button Elastomer Figure 6 8: Trim Ring and Menu Buttons Removal...

  • Page 129: A62 Front Panel Module Removal

    1. Set the oscilloscope so its bottom is down on the work surface and its front is facing you. 2. Insert the spudger into the slot at the front right of the chassis. Push inwards to release the snap lock at the right side. (See Figure 6 10.) 6 21 TAS 465 Service Manual...

  • Page 130: Front Panel Module Disassembly/Assembly

    Removal and Installation Procedures 3. Pull the Front Panel module slightly away from the front of the chassis until you can reach the interconnect cables at the rear of the module. 4. Unplug the following cables from their jacks on the Front Panel module: The Display Control to front panel cable at J84 The menu flex circuit to front panel at J40 The CPU to front panel cable at J30...

  • Page 131: Figure 6 11: Disassembly Of Front Panel Assembly

    6. Replace damaged buttons or elastomer. Front Panel Board Front Panel Button Elastomer Menu Button Flex the latches (3) downward to release board. Then, rotate the board and pull it down. Figure 6 11: Disassembly of Front Panel Assembly 6 23 TAS 465 Service Manual...

  • Page 132: Reassembly Of The Front Panel Module

    Removal and Installation Procedures Ground Spring Removal Perform the next step only if replacing a damaged ground spring. 7. Using Figure 6 12 as a guide, grasp (compress) the base of the ground spring (to release the spring) with tweezers (Item 5) and pull the ground spring away from the assembly.

  • Page 133: Menu Flex Circuit Replacement

    DO NOT touch the contacts on the menu flex circuit with your bare fingers. You should wear clean cloth gloves that are free of lint when installing the menu flex circuit on the front chassis. 6 25 TAS 465 Service Manual...

  • Page 134: A1 Analog Board

    Removal and Installation Procedures 4. Carefully align the three holes on the menu flex circuit to the locator studs on the front of the main chassis. When the alignment is correct, press the flex circuit against the chassis so it adheres to the chassis. 5.

  • Page 135: Display Driver Board (A3)

    3. Disconnect the cables from J70, J71, J72, J73, J74, J75, and J80 on the Display Driver board. 4. Disconnect J67 from the Analog Board (A1). 5. Remove the four T 15 Torx screws used to attach the Display Driver board to the chassis. 6 27 TAS 465 Service Manual...

  • Page 136: Crt Implosion Shield

    Removal and Installation Procedures 6. Remove the Display Driver board from the chassis, but leave the clear plastic sheet in place. 7. Replace the Display Driver board by performing the reverse of the procedure described in steps 1 through 6. Display Driver Board (A3) Mounting Screw...

  • Page 137: Figure 6 16: Crt Implosion Shield Removal

    4. Snap the right side of the implosion shield into the CRT front bracket snaps. 5. Install all previously removed components. Implosion Shield Guides Slot In CRT Bracket CRT Implosion Shield Spudger Figure 6 16: CRT Implosion Shield Removal 6 29 TAS 465 Service Manual...

  • Page 138: Figure 6 17: Fan Mount Removal

    Removal and Installation Procedures Fan and Fan Mount The procedures that follow describe how to remove and install the Fan and Fan Mount. Additional procedures required This procedure requires that the following procedures be performed first: Rear Cover Removal Cabinet Removal Fan and Fan Mount Removal 1.

  • Page 139: Figure 6 18: Fan And Fan Mount Removal

    3. Reconnect the fan power cable. 4. Re install all removed components. 6 31 TAS 465 Service Manual...
  • Page 140 Removal and Installation Procedures The procedures that follow describe how to remove and install the CRT. Refer to Figure 6 20 for this procedure. Additional procedures required This procedure requires that the following procedures be performed first: Rear Cover Removal Cabinet Removal Front Trim Removal A3 Display Driver Board...

  • Page 141: Figure 6 19: Crt Rear Bracket And Ground Wire

    4. Slip the CRT socket wires through the Rear CRT Bracket and slide the bracket onto the rear of the CRT. 5. Ensure that the Rear CRT Bracket is properly aligned with the slots provided in the CRT Shield. 6 33 TAS 465 Service Manual...
  • Page 142 Removal and Installation Procedures 6. Slide the Spring Ground Clip into the slot provided in the Rear CRT Bracket. 7. Connect the vertical and horizontal control wires to the side CRT pins. 8. Guide the front of the CRT into the CRT Front Bracket. Ensure that the four CRT Cushions are in their proper place in each corner of the Brack 9.

  • Page 143: Figure 6 20: Crt Removal

    Rear CRT Bracket Socket CRT Shield Cover Socket Static Ground CRT Mount Contact Cushion (4) Front CRT Bracket CRT Anode Lead CRT Shield Implosion Support Shield Light Guide Display Control Board Figure 6 20: CRT Removal 6 35 TAS 465 Service Manual...
  • Page 144 Removal and Installation Procedures CRT Light Guide The procedures that follow describe how to remove and install the CRT Light Guide. Refer to Figure 6 20 on page 6 35 for this procedure. Additional procedures required This procedure requires that the following procedures be performed first: Rear Cover Removal Cabinet Removal...

  • Page 145: Figure 6 21: Removing The Crt Front Bracket

    Rear Cover Removal Cabinet Removal Front Trim Removal A3 Display Driver Board Fan Assembly 1. Unplug the cables from connectors J80, J82, and J84 on the A2 Display Control board. 6 37 TAS 465 Service Manual...

  • Page 146: Figure 6 22: Removing The Display Control Board

    Removal and Installation Procedures 2. Lift the A2 Display Control board up toward the top of the chassis, sliding the board out of the board retainers. See Figure 6 22. Figure 6 22: Removing the Display Control Board 3. Re install the A2 Display Control board by sliding the board into the board retainers.

  • Page 147: Figure 6 23: Power Button Shaft Disconnect

    8. Remove the two screws securing the Power Supply module to the chassis. 9. Lift the Power Supply module out of the chassis to complete its removal. (See Figure 6 24.) Mounting Screw (2) Mounting Tab Figure 6 24: Power Supply Removal 6 39 TAS 465 Service Manual...
  • Page 148 Removal and Installation Procedures Power Supply Installation 1. Slide the Power Supply module into the chassis, noting that the tab at the bottom of the Power Supply module slides into the slot at the bottom of the chassis. See Figure 6 24. 2.

  • Page 149: Table 6 4: Equipment Required For Troubleshooting

    A3 Display Driver board unless it is necessary to measure the high voltage. Do not perform this procedure without the pres ence of another person who is cable of providing aid. 6 41 TAS 465 Service Manual...

  • Page 150: Table 6 5: Symptom Matrix

    Troubleshooting Symptom Matrix The Symptom Matrix (Table 6 5) is an aid in determining which modules to troubleshoot. There is no separate troubleshooting procedure for the power supply, since each module troubleshooting procedure includes checks of the power supply. The CRT is checked in the display control and display driver troubleshooting procedures.
  • Page 151 No LED's momentarily light at power on but readout is okay No LED's momentarily light at power on and abnormal readout Some LED's momentarily light at power on, but not all do No trigger on line source 6 43 TAS 465 Service Manual...

  • Page 152: Figure 6 25: A5 Cpu Board Troubleshooting Procedure

    Troubleshooting This procedure assumes that there is front panel control and readout on the CRT. Measure the power supply voltages at J55 on the A5 CPU board. Pin 1 -5.2V Pin 2 +5.2V Pin 3 Ground Pin 4 -8.6V Pin 5 +8.6V the voltages Turn the power off.

  • Page 153: Figure 6 26: A1 Analog Board Troubleshooting Procedure

    A5 CPU Board and the Perform both to isolate clicks heard for A62 Front Panel Module the problem. each channel? Troubleshooting Procedures? Go to Part Replace the A1 Analog board. Figure 6 26: A1 Analog Board Troubleshooting Procedure 6 45 TAS 465 Service Manual...
  • Page 154 Troubleshooting Part Two Note: In XY mode, a single Put the oscilloscope in XY spot should appear near mode. Select CH2 and turn the center of the CRT. the readout intensity to Reduce the intensity until minimum. Measure the the spot is dim so that the voltage across the delay CRT phosphor will not be line (J68) with a DMM.

  • Page 155: Figure 6 27: A3 Display Driver Board Troubleshooting Procedure

    Supply module. -2 kV? Does the line fuse blow when the POWER button is Go to pressed? Part Replace the A63 Power Supply module. Figure 6 27: A3 Display Driver Board Troubleshooting Procedure 6 47 TAS 465 Service Manual...
  • Page 156 Troubleshooting Part Put the oscilloscope in XY mode. Note: In XY mode, a single Turn the readout intensity all the spot should appear near way down. Select CH2 and vary the center of the CRT. the vertical position knob while Reduce the intensity until measuring the voltage across the spot is dim so that the...

  • Page 157: Figure 6 28: A62 Front Panel Module Troubleshooting Procedure

    Volts/Div pin 13 of J30 while con readout necting and disconnecting change? the probe to channel 1. Replace the A62 Front Panel Module Done. Figure 6 28: A62 Front Panel Module Troubleshooting Procedure 6 49 TAS 465 Service Manual...

  • Page 158: Figure 6 29: A2 Display Control Board Troubleshooting Procedure

    Troubleshooting This procedure checks the A2 Display Control board. Turn the Scale Illumination control while watching the CRT. the voltage on pin Does Disconnect the cable to Replace the A63 Power 12, W66 on the A3 the scale illumination J80 on the A2 Display Supply module.
  • Page 159 1. Obtain a corrugated cardboard shipping carton with inside dimensions at least 15 cm (6 in) taller, wider, and deeper than the TAS 465 Oscillo scope. The shipping carton must be constructed of cardboard with 170 kg (375 pound) test strength.
  • Page 160 Repackaging Information 6 52 Maintenance...

  • Page 161: Table 7 1: International Power Cords

    Options This section contains a list of options available for the TAS 465 Analog Oscilloscope. Options A1-A5: International Power Cords Besides the standard North American, 110 V, 60 Hz power cord, Tektronix ships any of five alternate power cord configurations. See Table 7 1.
  • Page 162 Options Option 02: Front Cover and Pouch With this option, Tektronix ships a protective front cover to prevent damage to the front panel of the oscilloscope while not in use. An attachable pouch (attaches to the instrument top) provides storage for the manuals and probes supplied with your oscilloscope plus other additional accessories you may want to keep with your oscilloscope.
  • Page 163 If a part you have ordered has been replaced with a new or improved part, your local Tektronix, Inc. Field Office or representative will contact you con cerning any change in part number. List of Assemblies A list of assemblies can be found at the beginning of the electrical parts list.
  • Page 164 A2 with its subassemblies and parts). Chassis mounted parts have no assembly number prefix and are located at the end of the electrical parts list. Tektronix Part No. Indicates part number to be used when ordering replacement part from Tektronix.
  • Page 165 2800 FULLING MILL HARRISBURG PA 17105 PO BOX 3608 01295 TEXAS INSTRUMENTS INC 13500 N CENTRAL EXPY DALLAS TX 75265 SEMICONDUCTOR GROUP PO BOX 655012 01884 DEARBORN ELECTRONICS INC 1221 NORTH HIGHWAY 17/92 LONGWOOD, FL 32750 TAS 465 Service Manual...
  • Page 166 Replaceable Electrical Parts List CROSS INDEX - MFR. CODE NUMBER TO MANUFACTURER Mfr. Code Manufacturer Address City, State, Zip Code 02114 PHILIPS COMPONENTS FERROXCUBE DIV SAUGERTIES, NY 12477 5083 KINGS HWY 04222 AVX CERAMICS 19TH AVE SOUTH MYRTLE BEACH SC 29577 DIV OF AVX CORP P O BOX 867 04713...
  • Page 167 14150 SW KARL BRAUN DR BEAVERTON OR 97077-0001 PO BOX 500 84411 AMERICAN SHIZUKI CORP 301 WEST O ST OGALLALA NE 69153-1844 OGALLALA OPERATIONS 91637 DALE ELECTRONICS INC 2064 12TH AVE COLUMBUS NE 68601-3632 PO BOX 609 TAS 465 Service Manual...
  • Page 168 Replaceable Electrical Parts List Replaceable Electrical Parts...
  • Page 169 Name & Description Code Mfr. Part No. CIRCUIT BD ASSY:ANALOG CIRCUIT BD ASSY:DISPLAY CONTROL CIRCUIT BD ASSY:DISPLAY DRIVER CIRCUIT BD ASSY:FRONT PANEL CIRCUIT BD ASSY:CPU FLEX CIRCUIT:BEZEL CIRCUIT BD ASSY:FRONT PANEL MODULE POWER SUPPLY ELECTRON TUBE:CRT TAS 465 Service Manual...
  • Page 170 Replaceable Electrical Parts Component Tektronix Serial No. Mfr. Number Part No. Effective Dscont Name & Description Code Mfr. Part No. 671-2219-09 CIRCUIT BD ASSY:ANALOG 80009 671221909 A1AT401 165-2500-03 MICROCKT,HYBRID:ATTENUATOR/PREAMP 80009 165250003 A1AT402 165-2500-03 MICROCKT,HYBRID:ATTENUATOR/PREAMP 80009 165250003 A1C402 285-1471-00 CAP ,FXD,PLASTIC:METALIZED FILM;0.01 MFD,10%...
  • Page 171 34371 CA3081 A1U404 156-0355-00 IC,LINEAR:7-TRANSISTOR,COMMON EMITTER 34371 CA3081 A1U405 165-2446-03 MICROCKT,HYBRID:ANALOG/TRIGGER/SWEEP 80009 165244603 A1U406 156-2605-00 IC,MISC:HCMOS,ANALOG MUX;8 CHAN,125 OHM 04713 MC74HC4051N/J A1U407 156-1631-01 IC,LINEAR:BIPOLAR,VOLT REG;ADJ,100MA,2.2% 01295 TL431CLPM A1W401 131-0566-00 BUS,CONDUCTOR:DUMMY RES,0.094 OD X 0.225L 24546 OMA0207 TAS 465 Service Manual...
  • Page 172 Replaceable Electrical Parts Component Tektronix Serial No. Mfr. Number Part No. Effective Dscont Name & Description Code Mfr. Part No. A1W406 131-0566-00 BUS,CONDUCTOR:DUMMY RES,0.094 OD X 0.225L 24546 OMA0207 A1W429 196-3064-00 LEAD,ELECTRICAL:26 AWG,4.0 L,1-N 80009 196306400 8 10 Replaceable Electrical Parts...
  • Page 173 RES,VAR,NONWW:PNL,5K OHM,0.5W 12697 W-8097 A2R8 311-2344-00 RES,VAR,NONWW:CKT BD,4.7K OHM,20%,1.25W 30983 P2322-510-90062 A2R9 311-2344-00 RES,VAR,NONWW:CKT BD,4.7K OHM,20%,1.25W 30983 P2322-510-90062 A2X1 352-1008-00 HOLDER,LAMP:PRESS-IN MOUNT,RIGHT ANGLE 65654 CIC 6500L A2X3 352-1008-00 HOLDER,LAMP:PRESS-IN MOUNT,RIGHT ANGLE 65654 CIC 6500L 8 11 TAS 465 Service Manual...
  • Page 174 Replaceable Electrical Parts Component Tektronix Serial No. Mfr. Number Part No. Effective Dscont Name & Description Code Mfr. Part No. 671-2904-02 CIRCUIT BD ASSY:DISPLAY DRIVER 80009 671290402 A3C102 281-0909-00 CAP ,FXD,CERAMIC:MLC;0.022UF,20%,50V 04222 SA105C223MAA A3C104 281-0909-00 CAP ,FXD,CERAMIC:MLC;0.022UF,20%,50V 04222 SA105C223MAA A3C105 281-0909-00 CAP ,FXD,CERAMIC:MLC;0.022UF,20%,50V...
  • Page 175 A3L101 120-1906-00 TRANSFORMER,RF:COIL,RF,TAPPED INDUCTOR 0JR03 120-1906-00 A3L102 120-1906-00 TRANSFORMER,RF:COIL,RF,TAPPED INDUCTOR 0JR03 120-1906-00 A3L103 108-1352-00 COIL,RF:FIXED,22UH,10% 54583 SPT0305-220K A3L104 108-0408-01 COIL,RF:FIXED,91NH ON FORM 0JR03 108-0408-01 A3L105 108-0170-02 COIL,RF:FIXED,360NH 0JR03 108-0170-02 A3L106 108-0736-01 COIL,RF:FIXED,828NH 0JR03 108-0736-01 8 13 TAS 465 Service Manual...
  • Page 176 Replaceable Electrical Parts Component Tektronix Serial No. Mfr. Number Part No. Effective Dscont Name & Description Code Mfr. Part No. A3L107 108-0736-01 COIL,RF:FIXED,828NH 0JR03 108-0736-01 A3L108 108-0170-02 COIL,RF:FIXED,360NH 0JR03 108-0170-02 A3L109 108-0436-00 COIL,RF:FIXED,240UH ON FORM 0JR03 A3L110 108-0408-01 COIL,RF:FIXED,91NH 0JR03...
  • Page 177 CCF50-2-27000J A3R216 313-1272-00 RES,FXD,FILM:2.7K OHM,5%,0.2W 91637 CCF50-2-27000J A3R217 322-3243-00 RES,FXD:METAL FILM;3.32K OHM,1%,0.2W 91637 CCF50-1-G33200F A3R218 322-3158-00 RES,FXD,FILM:432 OHM,1%,0.2W 57668 CRB2D FXE 432 A3R219 322-3287-00 RES,FXD,FILM:9.53K OHM,1%,0.2W 91637 CCF50G95300F A3R220 322-3371-00 RES,FXD,FILM:71.5K OHM,1%,0.2W 91637 CCF50G71501F 8 15 TAS 465 Service Manual...
  • Page 178 Replaceable Electrical Parts Component Tektronix Serial No. Mfr. Number Part No. Effective Dscont Name & Description Code Mfr. Part No. A3R221 322-3243-00 RES,FXD:METAL FILM;3.32K OHM,1%,0.2W 91637 CCF50-1-G33200F A3R222 322-3097-00 RES,FXD:METAL FILM;100 OHM,1%,0.2W 91637 CCF501G100R0F A3R223 322-3097-00 RES,FXD:METAL FILM;100 OHM,1%,0.2W 91637...
  • Page 179 04713 1N992BRL A3VR361 152-0470-00 DIODE,ZENER:,;200V,5%,0.4W 04713 1N992BRL A3W66 174-2602-00 CA ASSY,SP:FLAT FLEX,;FLX,23,26 AWG,6.5 L TK2469 174-2602-00 A3W100 131-0566-00 BUS,CONDUCTOR:DUMMY RES,0.094 OD X 0.225L 24546 OMA0207 A3W300 131-0566-00 BUS,CONDUCTOR:DUMMY RES,0.094 OD X 0.225L 24546 OMA0207 8 17 TAS 465 Service Manual...
  • Page 180 Replaceable Electrical Parts Component Tektronix Serial No. Mfr. Number Part No. Effective Dscont Name & Description Code Mfr. Part No. 671-2911-00 CIRCUIT BD ASSY:FRONT PANEL 80009 671291100 A4C101 283-5004-00 CAP ,FXD,CERAMIC:MLC;0.1UF,10%,25V,X7R,1206 04222 12063C104KAT3A A4C121 283-5004-00 CAP ,FXD,CERAMIC:MLC;0.1UF,10%,25V,X7R,1206 04222 12063C104KAT3A A4C122 283-5004-00 CAP ,FXD,CERAMIC:MLC;0.1UF,10%,25V,X7R,1206...
  • Page 181 311-2843-00 RES,VAR,NONWW:SHAFTLESS,SNAP IN MOUNT 32997 11508004 A4R451 311-2843-00 RES,VAR,NONWW:SHAFTLESS,SNAP IN MOUNT 32997 11508004 A4R452 311-2843-00 RES,VAR,NONWW:SHAFTLESS,SNAP IN MOUNT 32997 11508004 A4R453 311-2843-00 RES,VAR,NONWW:SHAFTLESS,SNAP IN MOUNT 32997 11508004 A4R460 321-5047-00 RES,FXD:THICK FILM;100K OHM,1%,0.125W 50139 BCK1003FT 8 19 TAS 465 Service Manual...
  • Page 182 Replaceable Electrical Parts Component Tektronix Serial No. Mfr. Number Part No. Effective Dscont Name & Description Code Mfr. Part No. A4R461 321-5047-00 RES,FXD:THICK FILM;100K OHM,1%,0.125W 50139 BCK1003FT A4R462 321-5047-00 RES,FXD:THICK FILM;100K OHM,1%,0.125W 50139 BCK1003FT A4R463 321-5047-00 RES,FXD:THICK FILM;100K OHM,1%,0.125W 50139...
  • Page 183 131-4807-00 CONN,HDR PWR:PCB,;MALE,STR,1 X 5,0.156 CTR 00779 640444-5 A5J204 131-3147-00 CONN,HDR:PCB,;MALE,STR,2 X 25,0.1 CTR 53387 2550-6002UB A5J205 131-5203-00 CONN,HDR:PCB,;MALE,STR,1 X 2,0.1 CTR 00779 104350-1 A5Q1 151-5001-00 TRANSISTOR,SIG:BIPOLAR,NPN;40V,200MA 04713 MMBT3904LT1 A5Q2 151-5001-00 TRANSISTOR,SIG:BIPOLAR,NPN;40V,200MA 04713 MMBT3904LT1 8 21 TAS 465 Service Manual...
  • Page 184 Replaceable Electrical Parts Component Tektronix Serial No. Mfr. Number Part No. Effective Dscont Name & Description Code Mfr. Part No. A5R201 321-5208-00 RES,FXD:THICK FILM;10M OHM,5%,0.125W 91637 CRCW1206-106JT A5R202 321-5048-00 RES,FXD:THICK FILM;332K OHM,1%,0.125W 57668 MCR18FXEA332K A5R203 321-5212-00 RES,FXD,FILM:4.99K OHM,1%,0.125W100PPM/DEG 91637 CRCW-12064991F...
  • Page 185 IC,MEMORY:CMOS,EPROM;128K X 8,200NS FLASH 80009 156646101 A5XJ205 131-0993-00 CONN, BOX, SHUNT, FEMALE, STR,1X2,0.1 CTR 00779 530153-2 A5Y201 158-5013-00 XTAL UNIT QTZ:32.768KHZ,+/- 0.002%, RS 60K 61429 FSM327 A5Y202 158-5012-00 XTAL UNIT QTZ:3.6864MHZ,+/-0.005%,ESR 150 61429 HC49SG 8 23 TAS 465 Service Manual...
  • Page 186 Replaceable Electrical Parts Component Tektronix Serial No. Mfr. Number Part No. Effective Dscont Name & Description Code Mfr. Part No. 259-0091-00 FLEX CIRCUIT:BEZEL 80009 259009100 672-1362-01 CIRCUIT BD ASSY:FRONT PANEL MODULE 80009 672136201 8 24 Replaceable Electrical Parts...
  • Page 187 DIODE,RECT:,ULTRA FAST;150V,25NS,35A 12969 UES1103 A63CR7 152-0400-00 DIODE,RECT:,FAST RCVRY;400V,1A,200NS 04713 1N4936RL A63CR8 152-0400-00 DIODE,RECT:,FAST RCVRY;400V,1A,200NS 04713 1N4936RL A63CR9 152-0040-00 DIODE,RECT:,;600V,1A,50A IFSM;1N5061 04713 MR5061RLR A63CR10 152-0040-00 DIODE,RECT:,;600V,1A,50A IFSM;1N5061 04713 MR5061RLR A63CR11 152-0400-00 DIODE,RECT:,FAST RCVRY;400V,1A,200NS 04713 1N4936RL 8 25 TAS 465 Service Manual...
  • Page 188 Replaceable Electrical Parts Component Tektronix Serial No. Mfr. Number Part No. Effective Dscont Name & Description Code Mfr. Part No. A63CR12 152-0040-00 DIODE,RECT:,;600V,1A,50A IFSM;1N5061 04713 MR5061RLR A63CR13 152-0400-00 DIODE,RECT:,FAST RCVRY;400V,1A,200NS 04713 1N4936RL A63CR14 152-0040-00 DIODE,RECT:,;600V,1A,50A IFSM;1N5061 04713 MR5061RLR A63CR15 152-0141-02 DIODE,SIG:,ULTRA FAST;40V,150MA;1N4152...
  • Page 189 50139 CB8235 A63R45 322-3318-00 RES,FXD,FILM:METAL FILM;20K OHM,1%,0.2W 57668 CRB20 FXE 20K0 A63R46 301-0472-00 RES,FXD,FILM:4.7K OHM,5%,0.5W 19701 5053CX4K700J A63R60 322-3193-00 RES,FXD:METAL FILM;1K OHM,1%,0.2W 57668 CRB20 FXE 1K00 A63R90 303-0270-00 RES,FXD,CMPSN:27 OHM,5%,1W 24546 FP32 OR FP1 8 27 TAS 465 Service Manual...
  • Page 190 Replaceable Electrical Parts Component Tektronix Serial No. Mfr. Number Part No. Effective Dscont Name & Description Code Mfr. Part No. A63RT1 307-1551-00 RES,THERMAL:20 OHM,10% 91637 2SS40-10% A63S1 260-2443-00 SWITCH,PWR:DPDT;6A 250VAC/1A 100VDC 31918 NE18-00-EE-N-47-0 1A (130238) A63T1 120-1401-00 TRANSFORMER,PWR:LINE TRIGGER;1:1 54937...
  • Page 191 Replaceable Electrical Parts Component Tektronix Serial No. Mfr. Number Part No. Effective Dscont Name & Description Code Mfr. Part No. 154-0905-01 ELECTRON TUBE:CRT 80009 154090501 8 29 TAS 465 Service Manual...
  • Page 192 Replaceable Electrical Parts Component Tektronix Serial No. Mfr. Number Part No. Effective Dscont Code Mfr. Part No. CHASSIS PARTS 119-1770-04 FAN,DC:TUBEAXIAL;12V,1.72W,35CFM,W/CONN S4246 CUDC12D4 DL68 119-5023-00 DELAY LINE,ELEC:VERTICAL TK2469 119-5023-00 174-3005-00 CA ASSY RF:DESCRETE,;SDI/RFD,22 AWG,8.625 L 0J7N9 ORDER BY DESC (WITH P66) 174-2598-00 CA ASSY,SP:FLAT FLEX,;FLX,16,26 AWG,13.7 L...
  • Page 193 The tilde (~) preceding a signal name indicates that the signal performs its intended function when in the low state. Other standards used in the preparation of diagrams by Tektronix. Inc are: Tektronix Standard 062 2476 Symbols and Practices for Schematic Drafting ANSI Y14.159 1971 Interconnection Diagrams...

  • Page 194: Figure 9 1: Graphic Items And Special Symbols Used In This

    Diagrams and Circuit Board Illustrations Locator Grid Power Termination Component on Function Block back of board Title Board Outline Strap Internal Screw Adjustment Refer to Waveform Panel Assembly Number Control Onboard Jumper Digital Ground Male Coaxial Refer to Assembly Connector &...

  • Page 195: Figure 9 3: Semiconductor Lead Configurations

    Voltage Reference 41 42 Voltage Regulators 12 11 10 Power FETs FETs Integrated Circuits Lead configurations and case styles are typical, but may vary due to vendor changes or instrument modifications. Figure 9 3: Semiconductor Lead Configurations TAS 465 Service Manual...

  • Page 196: Figure 9 4: Locating Components On Circuit Board Or Schematic

    LOCATING COMPONENTS ON THE CIRCUIT BOARD OR SCHEMATIC DIAGRAM CIRCUIT BOARD TO SCHEMATIC DIAGRAM Circuit board SCHEMATIC DIAGRAM TO CIRCUIT BOARD location illustration A14 Front Panel board 1. Determine the circuit board illustration 1. Locate the circuit board illustration. and component location. Identify the circuit board and its assembly num From the schematic diagram, determine ber that the part is located on by using the cir...
  • Page 197 TAS 465 Service Manual...
  • Page 198 A1 Analog Component Locator CIRCUIT SCHEM SCHEM BOARD BOARD CIRCUIT SCHEM SCHEM BOARD BOARD CIRCUIT SCHEM SCHEM BOARD BOARD CIRCUIT SCHEM SCHEM BOARD BOARD CIRCUIT SCHEM SCHEM BOARD BOARD NUMBER NUMBER LOCATION NUMBER LOCATION NUMBER NUMBER LOCATION NUMBER LOCATION NUMBER NUMBER LOCATION NUMBER...
  • Page 199 C416 Assembly Circuit C409 Number Number U404 R418 Subassembly Number (if used) Chassis mounted components have no Assembly Number prefix see end of Replaceable Electrical Parts List. STATIC SENSITIVE DEVICES Figure 9 5: A1 Analog Board TAS 465 Service Manual...
  • Page 200 Diagrams and Circuit Board Illustrations...

  • Page 201: Figure 9 6: A2 Display Control Board

    A23 A2 R1234 Assembly Circuit Number Number Subassembly Number (if used) Chassis mounted components have no Assembly Number prefix see end of Replaceable Electrical Parts List. STATIC SENSITIVE DEVICES Figure 9 6: A2 Display Control Board TAS 465 Service Manual...
  • Page 202 A3 Display Driver Component Locator CIRCUIT SCHEM SCHEM BOARD BOARD CIRCUIT SCHEM SCHEM BOARD BOARD CIRCUIT SCHEM SCHEM BOARD BOARD CIRCUIT SCHEM SCHEM BOARD BOARD CIRCUIT SCHEM SCHEM BOARD BOARD NUMBER NUMBER LOCATION NUMBER LOCATION NUMBER NUMBER LOCATION NUMBER LOCATION NUMBER NUMBER LOCATION...

  • Page 203: Figure 9 7: A3 Display Driver Board

    Number (if used) R351 R302 Chassis mounted components have no Assembly Number prefix see end of Replaceable Electrical Parts List. CR302 C301 R156 C129 STATIC C313 SENSITIVE DEVICES Figure 9 7: A3 Display Driver Board TAS 465 Service Manual 9 11...
  • Page 204 A4 Front Panel Component Locator CIRCUIT SCHEM SCHEM BOARD BOARD CIRCUIT SCHEM SCHEM BOARD BOARD CIRCUIT SCHEM SCHEM BOARD BOARD CIRCUIT SCHEM SCHEM BOARD BOARD CIRCUIT SCHEM SCHEM BOARD BOARD NUMBER NUMBER LOCATION NUMBER LOCATION NUMBER NUMBER LOCATION NUMBER LOCATION NUMBER NUMBER LOCATION...

  • Page 205: Figure 9 8: A4 Front Panel Board

    A23 A2 R1234 Assembly Circuit Number Number Subassembly Number (if used) Chassis mounted components have no Assembly Number prefix see end of Replaceable Electrical Parts List. STATIC SENSITIVE DEVICES Figure 9 8: A4 Front Panel Board TAS 465 Service Manual 9 13...
  • Page 206 CIRCUIT SCHEM SCHEM BOARD BOARD CIRCUIT SCHEM SCHEM BOARD BOARD CIRCUIT SCHEM SCHEM BOARD BOARD CIRCUIT SCHEM SCHEM BOARD BOARD CIRCUIT SCHEM SCHEM BOARD BOARD NUMBER NUMBER LOCATION NUMBER LOCATION NUMBER NUMBER LOCATION NUMBER LOCATION NUMBER NUMBER LOCATION NUMBER LOCATION NUMBER NUMBER LOCATION...

  • Page 207: Figure 9 9: A5 Processor Board

    A23 A2 R1234 Assembly Circuit Number Number Subassembly Number (if used) Chassis mounted components have no Assembly Number prefix see end of Replaceable Electrical Parts List. STATIC SENSITIVE DEVICES Figure 9 9: A5 Processor Board TAS 465 Service Manual 9 15...
  • Page 208 A63 Power Supply Component Locator CIRCUIT BOARD SCHEM CIRCUIT BOARD SCHEM CIRCUIT BOARD SCHEM CIRCUIT BOARD SCHEM CIRCUIT BOARD SCHEM CIRCUIT BOARD SCHEM CIRCUIT BOARD SCHEM CIRCUIT BOARD SCHEM NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION NUMBER LOCATION...

  • Page 209: Figure 9 10: A63 Power Supply

    Number (if used) Chassis mounted components have no Assembly Number prefix see end of Replaceable Electrical Parts List. STATIC SENSITIVE DEVICES 389 1904 01 671 5033 01 Q9B 1904 01 Figure 9 10: A63 Power Supply TAS 465 Service Manual 9 17...
  • Page 210 9 18 Diagrams and Circuit Board Illustrations...
  • Page 257 Replaceable Mechanical Parts This section contains a list of the components that are replaceable for the TAS 465 Analog Oscilloscope. As described below, use this list to identify and order replacement parts. There is a separate Replaceable Parts List for each instrument.
  • Page 258 Replaceable Mechanical Parts Indentation System This parts list is indented to show the relationship between items. The following example is of the indentation system used in the Description column: Name & Description Assembly and/or Component Attaching parts for Assembly and/or Component (END ATTACHING PARTS) Detail Part of Assembly and/or Component Attaching parts for Detail Part...
  • Page 259 111 INDUSTRIAL RD COLD SPRING KY 41076-9749 75915 LITTELFUSE INC 800 E NORTHWEST HWY DES PLAINES IL 60016-3049 SUB TRACOR INC 80009 TEKTRONIX INC 14150 SW KARL BRAUN DR BEAVERTON OR 97077-0001 PO BOX 500 10 3 TAS 465 Service Manual...
  • Page 260 Replaceable Mechanical Parts Fig. & Index Tektronix Serial No. Mfr. Part No. Effective Dscont 12345 Name & Description Code Mfr. Part No. 10 1-1 390-1106-01 CABINET,OSC:ALUMINUM TK1935 ORDER BY DESC 367-0356-01 HANDLE,CARRYING:13.855,SST, 0JR05 ORDER BY DESC 212-0144-00 SCREW,TPG,TF:8-16 X 0.562 L,PLASTI,SPCL HD...

  • Page 261: Figure 10 1: Cabinet And Rear

    Replaceable Mechanical Parts Figure 10 1: Cabinet and Rear 10 5 TAS 465 Service Manual...
  • Page 262 Replaceable Mechanical Parts Fig. & Index Tektronix Serial No. Mfr. Part No. Effective Dscont 12345 Name & Description Code Mfr. Part No. 10-2-1 200-3232-01 COVER,FRONT:ASB TK1908 ORDER BY DESC 334-8204-00 MARKER,IDENT:MKD INST NOMENCLATURE 80009 334820400 101-0135-00 TRIM.DECORATIVE: 80009 101013500 378-0199-03 FILTER,LT,CRT:BLUE,3.415 X 4.105 X 0.030THK...

  • Page 263: Figure 10 2: Front Panel Assembly

    Replaceable Mechanical Parts Figure 10 2: Front Panel Assembly 10 7 TAS 465 Service Manual...
  • Page 264 Replaceable Mechanical Parts Fig. & Index Tektronix Serial No. Mfr. Part No. Effective Dscont 12345 Name & Description Code Mfr. Part No. 10-3-1 337-2926-03 SHLD,IMPLOSION:4.44 X 3.67 X 0.06,CLEAR TK1159 ORDER BY DESC 407-4130-01 BRACKET,CRT:FRONT 80009 407413001 348-1474-00 GASKET; DUST SEAL...

  • Page 265: Figure 10 3: Chassis

    Replaceable Mechanical Parts Figure 10 3: Chassis 10 9 TAS 465 Service Manual...
  • Page 266 Replaceable Mechanical Parts Fig. & Index Tektronix Serial No. Mfr. Part No. Effective Dscont 12345 Name & Description Code Mfr. Part No. 10-4-1 -------- LAMP ,INCAND:14V,0.08A,WEDGE BASE,T1.75 (SEE A2DS1,DS2 REPL) 196-3405-00 LEAD,ELECTRICAL:4.0L,W/AMPRING TERMINAL 80009 196340500 210-0457-00 NUT,PL,ASSEM WA:6.32 X 0.312,STL CD PL...

  • Page 267: Figure 10 4: Circuit Boards

    Replaceable Mechanical Parts Figure 10 4: Circuit Boards 10 11 TAS 465 Service Manual...

  • Page 268: Figure 10 5: Accessories

    Replaceable Mechanical Parts Fig. & Index Tektronix Serial No. Mfr. Part No. Effective Dscont 12345 Name & Description Code Mfr. Part No. STANDARD ACCESSORIES 10-5-1 161-0104-05 CABLE ASSY,PWR,:3,18 AWG,240V,98.0 L S3109 SAA/3-OD3CCFC3X (OPTION A3-AUSTRALIAN) 161-0104-06 CABLE ASSY,PWR,:3 X 0.75MM SQ,220V,98.0 L...

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