Tektronix TDS 420A Service Manual
  1. Manuals
  2. Brands
  3. Tektronix Manuals
  4. Test Equipment
  5. TDS 420A
  6. Service manual
Tektronix TDS 420A Service Manual

Tektronix TDS 420A Service Manual

Digitizing
Hide thumbs Also See for TDS 420A:
Table of Contents

Advertisement

Quick Links

See also: Programming Manual , User Manual
Enlarged version
Service Manual
TDS 420A, TDS 430A & TDS 460A
Digitizing Oscilloscopes
S/N B080000 and above
070-9703-06
Revsion A
Warning
The servicing instructions are for use by qualified
personnel only. To avoid personal injury, do not
perform any servicing unless you are qualified to
do so. Refer to all safety summaries prior to
performing service.
www.tektronix.com

Advertisement

Table of Contents
loading

Related Manuals for Tektronix TDS 420A

Summary of Contents for Tektronix TDS 420A

  • Page 1 Service Manual TDS 420A, TDS 430A & TDS 460A Digitizing Oscilloscopes S/N B080000 and above 070-9703-06 Revsion A 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.
  • Page 2 Copyright © Tektronix, Inc. 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. Tektronix, Inc., P.O. Box 500, Beaverton, OR 97077...
  • Page 3 Tektronix, with shipping charges prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located.
  • Page 4 6:00 a.m. - - 5:00 p.m. Pacific time This phone number is toll free in North America. After office hours, please leave a voice mail message. Outside North America, contact a Tektronix sales office or distributor; see the Tektronix web site for a list of offices.

  • Page 5: Table Of Contents

    ........... . . 4- - 18 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 6 ........6- - 77 Options Electrical Parts List Diagrams Mechanical Parts List TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 7: Table Of Contents

    Figure 5- -6: Exposing the Probe Body ......5- -16 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 8 Figure 6- -25: Fan and fan mount removal ..... . 6- -64 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 9 Figure 9- -3: TDS 400A Block Diagram, B010100 - - B079999 ..9- -4 Figure 9- -4: TDS 400A Block Diagram, B010100 - - B079999 (Cont) 9- -5 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 10 ... 10- -13 Figure 10- -5: Cables and routing (B080000 - Up) ....10- -15 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 11 ....5- -4 Table 5- -3: Test Equipment, Fixtures, and Supplies ... . . 5- -5 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 12 ....... 7- -5 viii TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 13: General Safety Summary

    Provide Proper Ventilation. To prevent product overheating, provide proper ventilation. Do Not Operate With Suspected Failures. If you suspect there is damage to this product, have it inspected by qualified service personnel. TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 14 DANGER Protective Ground ATTENTION High Voltage (Earth) Terminal Refer to Manual Certifications and Refer to the specifications section for a listing of certifications and compliances Compliances that apply to this product. TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 15: Service Safety Summary

    To avoid electric shock, do not touch exposed connections. X-Radiation. To avoid x-radiation exposure, do not modify or otherwise alter the high-voltage circuitry or the CRT enclosure. X-ray emissions generated within this product have been sufficiently shielded. TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 16 Service Safety Summary TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 17: Product Description 1

    Preface This service manual provides service information for the TDS 420A, TDS 430A, and TDS 460A Digitizing Oscilloscopes. STOP. If servicing a TDS 430A, follow the procedures for the TDS 460A, but ignore all references to CH 3 and CH 4.
  • Page 18 Various icons such as the example icon at the left are used in procedures to help identify certain readouts and menu functions on screen. TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 19: Related Manuals

    Preface Related Manuals These other manuals are available for the TDS 430A, TDS 420A, and TDS 460A Digitizing Oscilloscopes: H The Reference gives you a quick overview of how to operate your oscillo- scope. H The User Manual provides instructions on how to operate your oscilloscope.

  • Page 20: Before Servicing

    Tektronix. Before Servicing This manual is for servicing the TDS 420A, TDS 430A, & TDS 460A Digitizing Oscilloscopes. To prevent injury to yourself or damage to the oscilloscope, do the following before you attempt service: H Be sure you are a qualified service person.

  • Page 21: Tektronix Service

    Installation Procedures, also found in Chapter 6. Tektronix Service Tektronix provides service to cover repair under warranty as well as other services that may provide a cost-effective answer to your service needs. Whether providing warranty repair service or any of the other services listed below, Tektronix service technicians, trained on Tektronix products, are best equipped to service your digitizing oscilloscope.
  • Page 22 Beaverton, Oregon service center, typically within 24 hours. Each module comes with a 90-day service warranty. For More Information. Contact your local Tektronix service center or sales engineer for more information on any of the repair or adjustment services just described.

  • Page 23: Product Description

    Centronics ports Math Including: invert, add, subtract, multiply, and with Option 2F, integral, differential, and FFT User interface A graphical user interface, on-line help. and a logical front-panel layout 1- 1 TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 24: User Interface

    100 MHz, and 20 MHz bandwidth. Such icons allow you to more readily determine status or the available settings. 1- 2 TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 25: Horizontal System

    The 60,000 and 120,000 point record lengths are available only with Option 1M. If you select the Hi Res acquisition mode, the maximum Option 1M record length reduces to 60,000 points. 1- 3 TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 26: Trigger System

    H You can use peak-detect, high-resolution, sample, envelope, and average modes to acquire signals. H You can set the acquisition to stop after a single acquisition (or sequence of acquisitions if acquiring in average or envelope modes). 1- 4 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 27 Any four out of the more than 20 parameters available can be displayed on the screen. The displayed parameters are extracted continu- ously and the results updated on screen as the digitizing oscilloscope continues to acquire waveforms. 1- 5 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 28 By using ZOOM, you can magnify the waveform parameter using the vertical and horizontal controls to expand (or contract) and position it for viewing. 1- 6 TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 29: Nominal Traits

    HiRes Input Channels, Number of TDS 430A: Two, both identical, called CH 1 and CH 2 TDS 420A and TDS 460A: Four, all identical, called CH 1 through CH 4 Input Coupling DC, AC, or GND 1 MΩ or 50 Ω...
  • Page 30 50 mV/div and 100 mV/div, the volts/division can be set with 0.5 mV resolution. Rise Time (ns) = Rise time is defined by the following formula: BW (MHz) 1- 8 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 31 Table 1- 5: Nominal Traits — Triggering System Name Description Range, Events Delay 1 to 9,999,999 Ranges, Trigger Level or Threshold Source Range ±12 divisions from center of screen Any Channel ±400 Volts Line 1- 9 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 32 Either of two fuses a 5 mm × 20 mm, (IEC 127): 6.3 A FAST, 250 V. VGA compatible at 30.6 kHz sync rate. Each fuse type requires its own fuse cap. 1- 10 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 33 17.5 kg (38.6 lbs), when the rackmounted digitizing oscilloscope is packaged for domestic shipment Rackmount conversion kit 4.5 kg (10.0 lbs), parts only; 7.9 kg (17.5 lbs), parts plus package for domestic shipping 1- 11 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 34 Rackmount digitizing oscilloscope Height 178 mm (7.0 in) Width 483 mm (19.0 in) Depth 472 mm (18.6 in), without front-panel handles; 517 mm (20.35 in), with front-panel handles installed 1- 12 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 35 327.2 mm (18.55 in.) (12.88 in.) 165 mm (6.5 in.) 308.1 mm (12.13 in.) 569 mm (22.4 in.) 381 mm (15 in.) Figure 1- 1: TDS 400A Dimensional Drawing 1- 13 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 36 Nominal Traits 1- 14 TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 37: Warranted Characteristics

    ±(0.4% × |Net Offset | + (150 mV + 0.1 div × Vertical Scale) 1 V/div- - 10 V/div ±(1.5% × (Position × Volts/div) + Offset Accuracy + 0.04 div) Accuracy, Position 1- 15 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 38 ±5 V (DC + peak AC) is reached , with peaks less than or equal to ±30 V Input Voltage, Maximum, DC-50 Ω or AC-50 Ω Coupled 1- 16 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 39 The WI (waveform interval) is the time between the samples in the waveform record. Also, see the footnotes for Sample Rate Range and Equivalent Time or Interpolated Waveform Rates in Table 1- 4 on page 1- 9. 1- 17 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 40 ≥ 20 ns DC Coupled Sensitivity, Edge-Type Trigger, DC 0.35 division from DC to 50 MHz, increasing to 1 division at 350 MHz (TDS 420A) or Coupled 500 MHz (TDS 430A and TDS 460A) for any channel as trigger source Sensitivity, Video-Type, TV Field and TV 0.6 division of video sync signal...
  • Page 41 Operating, to 15,000 ft. (4570 m); Nonoperating, to 40,000 ft. (12190 m) Maximum operating temperature is decreased 1_ C per 1000 feet (305 meters) above 5000 feet (1525 meters). 1- 19 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 42 ≤ 0.5 division waveform displacement, or ≤ 1.0 division increase in peak-to-peak noise when subjected to a 3 V/m electromagnetic field over the frequency range of 80 MHz to 1000 MHz. 1- 20 TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 43: Installation 2

    This location is a typical office/home environment. Temporary condensation occurs only when the product is out of service. Safety Class Class 1 (as defined in IEC 1010-1, Annex H) - - grounded product 1- 21 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 44 Warranted Characteristics 1- 22 TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 45: Typical Characteristics

    DC- - 400 MHz 2 mV/div- - 4.98 mV/div DC- - 150 MHz DC- - 250 MHz 1 mV/div- - 1.99 mV/div DC- - 100 MHz DC- - 100 MHz 1- 23 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 46 Sample Rate Range and Equivalent Time or Interpolated Waveform Rates in Table 1- 4 on page 1- 9. You set the maximum external clock rate using the Horizontal Clock menu. 1- 24 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 47 PAL and SECAM. A holdoff of 0 to 100 typically covers a range of 1 to 400 ms Triggerable on Field Selections: Odd, Even, or Both Delayed Acquisition: Settable for delay by line number or runs after time delay Frequency, Maximum for Events Delay 90 MHz 1- 25 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 48 The time that reference waveforms, stored setups, and calibration constants are retained when there is no power to the oscilloscope. Data is maintained by lithium poly-carbon monofluoride. 1- 26 TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 49: Supplying Operating Power

    Table 2- -1 gives the color coding of the conductors in the power cord. If you require a power cord other than the one supplied, refer to Table 2- -2. 2- 1 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 50 The line voltage ranges and their associated line frequency ranges over which this oscilloscope operates are listed in Chapter 1 Specification. See Source Voltage and Frequency on page NO TAG for those ranges. 2- 2 TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 51: Operating Environment

    The top of the oscilloscope does not require ventilation clearance. CAUTION. If air flow is restricted, the power supply of the digitizing oscilloscope may temporarily shut down. 2- 3 TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 52: Applying And Interrupting Power

    A frequency response adjustment is required Low or High Frequency Response (Chapter 5) A trigger skew adjustment is required Trigger Skew (Chapter 5) Error Log Errors logged are lost 2- 4 TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 53: Repackaging Instructions

    (The original shipping carton, if available, meets these requirements.) If the oscilloscope is being shipped to a Tektronix Service Center, enclose the following information: the owner’s address, the name and phone number of a contact person, the type and serial number of the oscilloscope, the reason for returning to oscilloscope, and a complete description of the service required.
  • Page 54 Installation 2- 6 TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 55: Operating Information

    ON/STBY switch. When connecting or disconnecting the line cord to or from the power source, the principal power switch should be off. 2- 7 TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 56: Operating Information

    STATUS main-menu button to display the status menu. The messages reflect the state of the acquisition system, whether it is running or stopped (and if it is stopped, why), as well as setup-related information. 2- 8 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 57 1. Locate the block that contains the function to be set. Vertical Controls and Horizontal Controls Trigger Controls Inputs Block Block Block Special Controls Block: Accesses all functions except those in the remaining three control blocks. 2- 9 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 58 Vertically (1) and horizontally (2) scale and position the waveform(s) selected. Example: Set the scale to 100 mV/div, and center the waveform on screen. d. Stop and start acquiring waveforms (3). Example: Push RUN/STOP if not acquiring. 2- 10 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 59 Select a function from the main menu using the main menu buttons (12). A side menu for selecting among the available settings for that function appears. Example: Push Coupling (13). 2- 11 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 60 Pushing the button that popped up the menu (17) toggles through the pop-up menu choices. Example: Repeatedly push System to toggle through the pop-up menu. Notice the other main-menu button labels change accordingly. Toggle back to I/O. 2- 12 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 61 Example: Push Level (19). c. Use the general purpose knob (20) to adjust the trigger level to the setting desired. Example: Turn the knob to - -20 mV. 2- 13 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 62 H To assign the general purpose knob to control a function, display the menu containing the function; then select the function. (Note that the general purpose knob cannot control all functions.) 2- 14 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 63 Instructions for setting up communication over the GPIB are found in the Adjustment Procedures, starting on page 5- -1. 2- 15 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 64 Operating Information 2- 16 TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 65: Theory Of Operation

    Theory of Operation This chapter describes the electrical operation of the Tektronix TDS 420A, TDS 430A, and TDS 460A Digitizing Oscilloscopes using the major circuit blocks or modules. This chapter has two main parts: H Logic Conventions describes how logic functions are discused and represented in this manual.

  • Page 66: Theory Of Operation

    The display circuitry also generates and sends vertical (VSYNC) and horizontal (HSYNC) sync signals to the A26 Monitor assembly. A VGA-compatible video output is available at the rear of the oscilloscope. 3- 2 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 67 AC input by drawing current in a waveshape similar to and in phase with that of the voltage waveshape. AC input connector, fuse, and line trigger are included on this module. 3- 3 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 68 A01 Backplane through the A07 Auxiliary Power board. Battery The battery provides power to memory circuits that maintain calibration constants and oscilloscope setups when the oscilloscope power is off. 3- 4 TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 69: Performance Verification

    Throughout these procedures the following conventions apply: H Each test procedure uses the following general format: Title of Test Equipment Required Prerequisites Procedure 4- 1 TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 70: Performance Verification Procedures

    H Refer to Figure 4- -1: “Main menu” refers to the menu that labels the seven menu buttons under the display; “side menu” refers to the menu that labels the five buttons to the right of the display. 4- 2 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 71 Vertical Scale, Horizontal Scale, and Trigger Level Readouts Main menu display area. Readouts in lower graticule area move here when CLEAR MENU is pressed. Figure 4- 1: Map of Display Functions 4- 3 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 72 Performance Verification Procedures 4- 4 TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 73: Brief Procedures

    When finished, the resulting status appears on the screen. d. Confirm no failures are found: Verify that no failures are found and reported on screen. 4- 5 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 74 This oscilloscope lets you compensate the internal signal path used to acquire the waveforms you acquire and measure. By executing the signal path compensation feature (SPC), you optimize the oscilloscope capability to make accurate measurements based on the ambient temperature. 4- 6 TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 75: Functional Tests

    The purpose of these procedures is to confirm that this oscilloscope functions properly. The only equipment required is one of the standard-accessory probes and a 3.5 , 720 K or 1.44 Mbyte floppy disk. 4- 7 TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 76: Performance Tests 4

    Figure 4- 3: Universal Test Hookup for Functional Tests a. Hook up the signal source: Install the probe on CH 1. Connect the probe tip to PROBE ADJ on the front panel; leave the probe ground unconnected. 4- 8 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 77 H Turning the vertical SCALE knob counterclockwise decreases the amplitude of the waveform on-screen, turning the knob clockwise increases the amplitude, and returning the knob to 100 mV returns the amplitude to about five divisions. 4- 9 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 78 H Press the main-menu button Recall Factory Setup; then press the side-menu button OK Confirm Factory Init. c. Modify default settings: H Press AUTOSET to obtain a viewable, triggered display. H Set the horizontal SCALE to 200 s. 4- 10 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 79 Modify default settings: H Press AUTOSET to obtain a viewable, triggered display. H Set the horizontal SCALE for the M (main) time base to 200 s. H Press VERTICAL MENU. 4- 11 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 80 H The trigger-level readout for the delayed trigger system changes when you rotate the general purpose knob. H The general purpose knob can trigger and untrigger the square-wave probe-compensation signal as you rotate it. (Leave the signal untriggered.) 4- 12 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 81 If you ran the procedure again, the digitizing oscilloscope TEK00001.SET would increment the name and call the file c. Press the side-menu button Save To Selected File. 4- 13 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 82 1 baseline waveform is again vertically positioned near center screens as when you saved the setup. 3. Remove the test hookup: Remove the disk from the disk drive. REV DEC 93 4- 14 TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 83: Performance Tests

    ±5_ C of the present operating temperature. (If at the time you did the prerequisite Self Tests, the temperature was within the limits just stated, consider this prerequisite met.) 4- 15 TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 84: Equipment Required

    12. Meter, Level and Power Frequency range:10 MHz to 400MHz. Rohde & Schwarz URV 35, Checking Analog Bandwidth Sensor Amplitude range: 6 mVp-p to 2 V with NRV-Z8 power sensor and Trigger Sensitivity 4- 16 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 85 Trigger Sensitivity If available, items 11, 12, 13, and 15 can be replaced by a Tektronix SG 503 and SG 504. If available, a TG 501A may be used to check Sample-rate and Delay-time Accuracy. (A TM 500 or TM 5000 Series Power Module Mainframe is required.) If using a TG 501A, you may also need a 2X attenuator (50 Ω...

  • Page 86: Test Record

    Delta Time @ 20 ns (100 MHz) 9.7 ns __________ __________ 10.3 ns Long Term Sample Rate/ Delay Time @ 10 ns/100 s - - 1.5 Div __________ __________ +1.5 Div 4- 18 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 87 Auxiliary Trigger __________ __________ 10 MHz External Clock __________ __________ 10 MHz Probe Compensator Output Signal Frequency 950 Hz __________ __________ 1050 Hz Voltage 475 mV __________ __________ 525 mV 4- 19 TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 88: Signal Acquisition System Checks 4

    BNC T connector. Now connect the BNC T connector to CH 1. Digitizing Oscilloscope Output Sense DC Calibrator Dual Banana to BNC Adapters BNC T Connector 50 Ω Coaxial Cables Figure 4- 4: Initial Test Hookup 4- 20 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 89 H Press MEASURE. H Press the main-menu button Select Measurement for CHx; then press the side-menu button Mean. (You will have to press MORE several times to access the Mean measurement.) 4- 21 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 90 Two dual-banana connectors (Item 7) Measurement Accuracy Required One BNC T connector (Item 8) (Averaged) One DC calibration generator (Item 10) Two precision coaxial cables (Item 5) Prerequisites See page 4- - 15. 4- 22 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 91 H Press SHIFT and then ACQUIRE MENU. H Press the main-menu button Mode; then press the side-menu button Average 16. H Press DISPLAY. H Press the main-menu button Graticule; then press the side-menu button Frame. 4- 23 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 92 Record Measurement: Read the mean at the measurement readout, and record this number on a piece of scratch paper. d. Set the generator: Set the DC calibration generator to - -0.35 V. 4- 24 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 93 H Press the side-menu button OK Confirm Factory Init. b. Modify the default settings: H Press TRIGGER MENU. H Press the main-menu button COUPLING; then press the side menu button Noise Rej. 4- 25 TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 94: Sine Wave Generator Leveling Procedure 4

    H Press the front-panel button that corresponds to the channel you are to confirm. H Move the leveled output of the sine wave generator to the channel you select. 4- 26 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 95 H Press the side-menu button Ω to toggle it to the 50 Ω setting. d. Set the vertical scale: Set the vertical SCALE to one of the settings listed in Table 4- -3 (TDS 420A) or Table 4- -4 (TDS 430A and TDS 460A) not yet checked. (Start with the 100 mV setting.)
  • Page 96 TDS 460A) that corresponds to the vertical scale set in substep d. H Set the horizontal SCALE to 5 ns (TDS 420A) or 2 ns (TDS 430A and TDS 460A). H Press SET LEVEL TO 50% as necessary to trigger the display.
  • Page 97 You may skip checking the remaining vertical scale settings in Table 4- -3 (TDS 420A) or Table 4- -4 (TDS 430A and TDS 460A) (that is, skip the following substep, h) if this digitizing oscilloscope has passed...
  • Page 98 H If desired, finish checking the remaining vertical scale settings for the channel under test by repeating substeps d through g for each of the remaining scale settings listed in Table 4- -3 (TDS 420A) or Table 4- -4 (TDS 430A and TDS 460A) for the channel under test.
  • Page 99 Save a CH 2 waveform: Press CH 2; then press save/recall WAVE- FORM. Now, press the main-menu button Save Waveform; then press the side-menu button To Ref 2. 4- 31 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 100 Check all channels against limit: CHECK that the cursor readout on screen is ≤450 ps. If the cursor readout is ≤200 ps, skip substep h. 4- 32 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 101 H Measure the delay between Ref 3 and CH 4 using the method described in substep f above. H CHECK that the cursor readout on screen is ≤200 ps. 4- 33 TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 102: Time Base System Checks

    Figure 4- 10: Initial Test Hookup b. Initialize the oscilloscope: H Press save/recall SETUP. H Press the main-menu button Recall Factory Setup. H Press the side-menu button OK Confirm Factory Init. 4- 34 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 103 H Press MEASURE. H Press the main-menu button Remove Measurement; then press the side-menu button Measurement 1. H Set the horizontal SCALE of the Main time base to 100 ns. 4- 35 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 104 H Use the horizontal SCALE knob to set the D (delayed) time base to 100 ns. CHECK that the rising edge of the waveform crosses the center horizontal graticule line at a point within ±0.5 divisions of the center graticule. 4- 36 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 105 ±1.5 divisions of the center graticule. 3. Disconnect the hookup: Disconnect the cable from the time standard at the input connector of CH 1. 4- 37 TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 106: Trigger System Checks

    Output Sense DC Calibrator Dual Banana to BNC Adapters BNC T Connector 50 Ω Coaxial Cables Figure 4- 12: Initial Test Hookup b. Initialize the oscilloscope: H Press save/recall Setup. 4- 38 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 107 H Press HORIZONTAL MENU. H Press the main-menu button Time Base. H Press the side-menu buttons Delayed Only and Delayed Triggerable. H Set D (delayed) horizontal SCALE to 500 s. 4- 39 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 108 1. Install the test hookup and preset the oscilloscope controls: a. Initialize the oscilloscope: H Press save/recall SETUP. H Press the main-menu button Recall Factory Setup. H Press the side-menu button OK Confirm Factory Init. 4- 40 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 109 2. Confirm Main and Delayed trigger systems are within sensitivity limits (50 MHz): a. Display the test signal: H Set the generator frequency to 50 MHz. H Press MEASURE. 4- 41 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 110 MAIN LEVEL knob to stabilize the trigger if required.) H Leave the Main trigger system triggered on the positive slope of the waveform before continuing to the next step. 4- 42 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 111 (at upper frequency limits): a. Hook up the test-signal source: Disconnect the hookup installed in step 1. Connect the signal output of a sine wave generator to CH 1. 4- 43 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 112 Press the side-menu button Main Only. c. Display the test signal: H Set the generator frequency to 350 MHz (TDS 420A) or 500 MHz (TDS 430A and TDS 460A). H Set the test signal amplitude for about five divisions on screen. Now fine adjust the generator output until the CH 1 Amplitude readout indicates the amplitude is 500 mV.
  • Page 113 H Connect one of the cables just installed to CH 1; connect the other cable just installed to the AUX TRIGGER input at the rear panel. To Rear Panel Sine Wave Digitizing Oscilloscope Generator Output Figure 4- 15: Initial Test Hookup 4- 45 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 114 Figure 4- 16: Confirming Auxiliary Triggering at Maximum Triggering Frequency 3. Disconnect the hookup: Disconnect the cable from the generator output at the input connector of the channel last tested. 4- 46 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 115 CLOCK input on the rear panel of the oscilloscope (see Figure 4- -17). Sine Wave To Rear Panel Function Digitizing Oscilloscope Generator Generator Output Output Figure 4- 17: Initial Test Hookup 4- 47 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 116 H CHECK that the period of the displayed sine wave changes to two divisions. H Press CLEAR MENU. 2. Disconnect the hookup: Disconnect the cables from the generators at the CH 1 and AUX TRIGGER/EXT CLOCK input connectors. 4- 48 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 117 75 Ω terminator, the output of a NTSC format video generator to CH 1 (see Figure 4- -18). Digitizing Oscilloscope Video Generator Output 75 Ω Terminators Figure 4- 18: Initial Test Hookup 4- 49 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 118 H Press the main menu button Fine Scale. H Use the General Purpose knob, adjust the fine gain until the sync pulse amplitude is 0.6 divisions measured using the graticule (see Figure 4- -19). 4- 50 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 119 TV line duration (63.5 s), then it is the end of field 2 — see waveform R1 in Figure 4- -20.) H Press the side menu button Even. Center the display at mid screen. 4- 51 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 120 ½ a line in duration (63.5 s and 31.75 s respectively), then triggering is occurring on both fields — see waveforms R3 and R4 in Figure 4- -20.) d. Check delay by lines: H Press the main-menu button Scan. 4- 52 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 121 Hook up test signal: Install the standard-accessory probe on CH 1. Connect the probe tip to PROBE ADJ on the front panel; leave the probe ground unconnected (see Figure 4- -21). 4- 53 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 122 Amplitude. H Repeatedly press the side-menu button - -more- - until Frequency appears in the side menu (its icon is shown at the left). Press the side-menu button Frequency. 4- 54 TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 123: Sine Wave Generator Leveling Procedure

    If you do not have a leveled sine wave generator, use one of the following procedures to level the output amplitude of your sine wave generator. 4- 55 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 124 3. Record the reference level: Note the reading on the level meter. 4. Set the generator to the new frequency and reference level: H Change the sine wave generator to the desired new frequency. 4- 56 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 125 H Set the sine wave generator to a reference frequency of 10 MHz. H Adjust the sine wave generator amplitude to the required number of divisions as measured by the digitizing oscilloscope. 4- 57 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 126 3. The signal amplitude is now correctly set for the new frequency. H Disconnect the sine wave generator from the power sensor. H Connect the sinewave generator to the digitizing oscilloscope. 4- 58 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 127 H This general information about adjusting this oscilloscope and the written procedures for installing and using the adjustment software. H The TDS 420A, TDS 430A, & TDS 460A Adjustment Software included with this manual. Read the material in this section before using the adjustment software.

  • Page 128: Probe Adjustment 5

    5- -10. Complete Adjustment A complete adjustment is the performance of all adjustments contained in the Adjustment Software plus the probe adjustment on page 5- -10. Therefore, to do a 5- 2 TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 129: Monitor Assembly Adjustment 5

    Complete Adjustment Attenuator Board Complete Adjustment Front Panel Assembly None Required Low Voltage Power Supply Complete Adjustment CPU Assembly Complete Adjustment DSP Assembly None Required Display Assembly None Required 5- 3 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 130 High Frequency Response Adjustment Voltage Reference (TDS 430A and TDS 460A only) Trigger Adjustment Voltage Reference Probe Adjustment Voltage Reference, Low Frequency Response, and High Frequency Response Monitor Adjustment None 5- 4 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 131 Adjustment Procedures Equipment Required The test equipment required to adjust the TDS 420A, TDS 430A, and TDS 460A Digitizing Oscilloscopes is listed in Table 5- -3. Table 5- 3: Test Equipment, Fixtures, and Supplies Item Number and Description Minimum Requirements...
  • Page 132 Tektronix J17 Photometer with Contrast adjustment (0.343 to 686 Candelas) J1803 Luminance Probe Requires a TM 500 or TM5000 Series Power Module Mainframe. Requires a TM5000 Series Power Module Mainframe. 5- 6 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 133 1. Create a working disk: Power on and boot your system. Using the proper DOS commands, copy the adjustment software for your digitizing oscillo- scope to a working disk. 5- 7 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 134 3. Let the oscilloscope warm up: Allow a 20 minute warm up period before you begin step 4. 4. Start the adjustment software: a. Change drives to your hard drive. b. Change directories to TDS400A.ADJ. c. Type ADJ400A. 5- 8 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 135 5. When adjustment is completed: a. To do a complete adjustment as defined on page 5- -2, do the procedure Probe Adjustment on page 5- -10. 5- 9 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 136 H Press the side-menu button OK Confirm Factory Init. c. Modify the initialized front-panel control settings: H Press AUTOSET. Set the horizontal SCALE to 200 s. H Press SET LEVEL TO 50%. 5- 10 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 137 Using the probe compensation tool, adjust the probe for best square wave compensation (flat as possible across the top of the waveform). (See Figure 5- -3.) Figure 5- 2: Performing Probe Compensation 5- 11 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 138 Measure the Probe Equipment TDS 420A: one leveled sine wave generator (Item 13) Bandwidth Required TDS 430A and TDS 460A: one leveled sine wave generator (Item 14) One BNC female to BNC female adapter (Item 2) One 50 Ω...
  • Page 139 Figure 5- 5: Initial Test Hookup c. Initialize the oscilloscope: H Press save/recall SETUP. H Press the main-menu button Recall Factory Setup. H Press the side-menu button OK Confirm Factory Init. 5- 13 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 140 600 mV (6 division), 10 MHz or less reference signal. H (TDS 420A Only) Set the horizontal SCALE to 2 ns and set the frequency of the generator to 200 MHz. H (TDS 430A and TDS 460A Only) Set the horizontal SCALE to 1 ns and set the frequency of the generator to 400 MHz.
  • Page 141 Bandwidth. If not, follow the instructions in Figure 5- -4 to expose the probe tip. H Follow the instructions in Figure 5- -6 to remove the probe body covers. 5- 15 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 142 H Set the triggering level of the pulse generator head to minimum. Digitizing Oscilloscope Pulse Generator Output 10X Attenuator Pulse Generator Head Precision Cable Figure 5- 7: Initial Test Hookup c. Initialize the oscilloscope: H Press save/recall SETUP. 5- 16 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 143 H Press the main-menu button Trigger Position; and press the side-menu button 10%. H Push SHIFT. Then press SAVE WAVEFORM. H Press the main-menu button Save Waveform. Then press the side-menu button To Ref 1. 5- 17 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 144 5 ns than during the entire first 20 ns the adjustments affect. H See Figure 5- -10 to see what areas on the front corner that the various adjustments affect. 5- 18 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 145 H If bandwidth is met, adjustment is complete. Skip to step 3. H If bandwidth is not met, redo this procedure, increasing front corner overshoot slightly relative to the stored waveform. H Repeat this step (d) until bandwidth is met. 5- 19 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 146 Unplug the probe from the BNC to probe tip Disconnect the hookup: adapter. Reverse the instructions in Figure 5- -4, page 5- -13, to reinstall the retractable probe tip. 5- 20 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 147 If the display rolls vertically adjust V. SYNC (R453) to the center of the stable display range. (See Figure 5- -11.) b. If diagonal lines are present on the display adjust H. SYNC (R473) to the center of the stable display range. 5- 21 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 148 H Adjust R482 until the background raster lines in the 5% luminance patch (see Figure 5- -12 on page 5- -24) disappear while the lines in the 10% luminance patch are visible. 5- 22 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 149 H Repeatedly press the side-menu button - -more- - until White Box appears in the side menu. Push White Box. H Press the main-menu button EXECUTE. Then press the side-menu button Ok Confirm Run Test. 5- 23 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 150 H Repeatedly press the side-menu button - -more- - until Composite appears in the side menu. Push Composite. H Press the main-menu button EXECUTE. Then press the side-menu button Ok Confirm Run Test. 5- 24 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 151 Corner Figure 5- 13: Composite Pattern for Focusing 6. Restore the oscilloscope to normal operation: a. Restore the dip switch to the settings that follow: Switch No. Open Closed 5- 25 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 152 Adjustment Procedures b. Power off the oscilloscope. c. See the Removal and Installation Procedures starting on page 6- -9 to reinstall the cabinet and other modules removed in step 1. 5- 26 TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 153: Inspection And Cleaning 6

    Maintenance This chapter contains the information needed to do periodic and corrective maintenance on the TDS 420A, TDS 430A, & TDS 460A Digitizing Oscillo- scopes. Specifically, the following sections are included: H Preparation — General information on preventing damage to internal modules when doing maintenance.
  • Page 154 8. Avoid handling modules in areas that have a floor or work-surface covering capable of generating a static charge. 9. Do not use high-velocity compressed air when cleaning dust from modules. 6- 2 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 155 7 = 400 to 1000 V (est.) 3 = 250 V 8 = 900 V 4 = 500 V 9 = 1200 V 5 = 400 to 600 V 6- 3 TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 156: Inspection And Cleaning

    Inspection and Cleaning Inspection and Cleaning describes how to inspect for dirt and damage on, and how to clean the exterior and interior of, the TDS 420A, TDS 430A, & TDS 460A Digitizing Oscilloscopes. Inspection and cleaning are done as preventive maintenance.

  • Page 157: Removal And Installation Procedures 6

    If any electrical module is replaced, check Table 5- -1 on page 5- -3 to see if it is necessary to adjust the oscilloscope. CAUTION. To prevent damage from electrical arcing, ensure that circuit boards and components are dry before applying power to the oscilloscope. 6- 5 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 158 2. Remove any remaining dust with a lint free cloth dampened in isopropyl alcohol (75% solution) and rinse with warm deionized water. (A cotton-tipped applicator is useful for cleaning in narrow spaces and on circuit boards.) 6- 6 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 159 8. Dry all components and assemblies in an oven or drying compartment using 52_ to 65_ C (125_ to 150_ F) circulating air. Lubrication. There is no periodic lubrication required for this oscilloscope. 6- 7 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 160 Maintenance 6- 8 TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 161: Preparation — Please Read 6

    H Three module locator diagrams for finding all the modules in this oscillo- scope. WARNING. Before doing any procedure in this section, disconnect the power cord from the line voltage source. Failure to do so could cause serious injury or death. 6- 9 TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 162: Access Procedure 6

    Instructions for cleaning are found in Inspection and Cleaning beginning on page 6- -4. The Disassembly for Cleaning procedure does not use the access procedure. 6- 10 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 163 Removal and Installation Procedures NOTE. Read the cleaning procedure before disassembling the oscilloscope for cleaning. Figure 6- 1: Oscilloscope orientation 6- 11 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 164 Slip-jaw pliers Used for removing the front feet from the cabinet. Front cover This optional accessory protects the front of the oscilloscope when positioned face down in the removal procedures. 6- 12 TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 165: Access Procedure

    H Find the procedure that includes the name of the module noted in step1. H Perform the access instructions listed for the procedure found to access and remove the module. 6- 13 TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 166: Procedures For Module Removal And Installation 6

    — they guide you in reinstalling all modules removed. All procedures are found under Procedures for Module Removal and Installation on page 6- -23, which follows this access procedure. 6- 14 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 167 Do the procedure listed at left, removing all modules including the module(s) you want to service. When doing the procedure listed at left, do not remove the menu flex circuit unless it is being replaced with a new module. 6- 15 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 168 Trim Ring Front Cover (optional) Probe Code Flex Assembly A06 Front Panel Assembly Front Panel Front Panel Shafts Disk Knobs Drive Figure 6- 2: Cabinet and front-panel mounted modules 6- 16 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 169 A07 Auxiliary Power Supply 6- - 67 Do the procedure listed at left to remove the module. Line Filter 6- - 65 Do the procedure listed at left to remove the module. 6- 17 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 170 Do A08 Jumper Board Assembly, D1 Bus, and Board Supports (see page 6- - 44). Do not remove the board supports. Do the procedure listed at left to remove the module. 6- 18 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 171 Board Support (3) Assembly Battery (2) A04 Acquisition Assembly Battery Clamp (2) Mounting Screws Mounting Screw A08 Jumper Assembly Attenuator A05 Attenuator Shield Assembly Figure 6- 3: Internal modules 6- 19 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 172 Unsolder the cable to be replaced using a 15 watt soldering iron and remove it from the auxiliary power supply. Reverse these instructions to install the replacement cable. 6- 20 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 173 Unplug the cable from the monitor. See Figure 6- - 4 for jack location. Unplug the cable from the auxiliary power supply. See Figure 6- - 4 for jack location. Reverse these instructions to install the replacement cable. 6- 21 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 174 (Soldered at Backplane) Front Panel Disk Drive to Display CPU to Front Panel Backplane to Attenuator (Soldered at Backplane) Figure 6- 4: Cables and cable routing, B010100 - B079999 6- 22 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 175 1. Assemble equipment and locate modules to be removed: Have handy a pair Shafts of angled-tip tweezers (Item 10). Find the knob(s) to be removed on the front panel. 6- 23 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 176 Rotate the knob while lightly pushing inwards until the shaft slips into its receptacle. Push the knob all the way in to seat the knob assembly. 6- 24 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 177 Removal and Installation Procedures When reinstalling the knobs, note there are two sizes. Be sure to reinstall the proper size knob in the proper location. Figure 6- 6: Knob and shaft removal 6- 25 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 178 Find the line cord on the rear cover. (See Figure 6- -7.) Unplug Rotate B010100 - B079999 Line Fuse Line Cap Pull Figure 6- 7: Line fuse and line cord removal 6- 26 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 179 4. Remove rear cover: Remove the four T-15 TorxR screws securing the rear cover to the oscilloscope. Lift off the rear cover. If no other modules are being serviced, skip to the end (step 8) of this procedure. 6- 27 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 180 Front Foot: Rotate and remove. Mounting Screw Figure 6- 8: Front cover, rear cover, cabinet, emi gasket, and cabinet handle and feet removal 6- 28 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 181 Use a pair of needle-nose pliers to pry up one of the ends of the gasket. d. Grasp the EMI gasket, and gently pull it out of the its channel. 6- 29 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 182 See the procedure Line Fuse and Line Cord to reinstall the line cord, which completes the oscilloscope reassembly. 6- 30 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 183 Repeat for the bottom edge of the trim ring. Lock Trim Ring Menu Button (17) Menu Elastomer Figure 6- 9: Trim ring, menu elastomer, and menu buttons removal 6- 31 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 184 H Using a wood spudger, push the EMI gasket until it is firmly seated at the bottom of the groove. It should not overlap either flex lock. H Repeat the process just described to install the remaining three gaskets. 6- 32 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 185 H Line Fuse and Line Cord (page 6- -26) to reinstall the line cord, which completes the oscilloscope reassembly Spudger EMI Gaskets (4) Figure 6- 10: EMI gasket removal and installation 6- 33 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 186 Remove the one or two screws securing the drive to the chassis. e. Grasp the drive by its front edges and pull it out of the front panel to complete its removal. 6- 34 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 187 Then pull the ESD shield off the left edge of the front panel to remove. (The shield snaps on and off.) 6- 35 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 188 J405. See Figure 6- -13. c. Lift the circuit board away from the rest of the assembly. 6- 36 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 189 If such is not the case, skip to step 9 to continue this procedure. 8. Remove the menu flex circuit: Pull the flex circuit away from the front of the main chassis. (The flex circuit is held on by its sticky backing.) 6- 37 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 190 Handle and Feet (page 6- -27) to reinstall the cabinet and rear cover H Line Fuse and Line Cord (page 6- -26) to reinstall the line cord, which completes the oscilloscope reassembly 6- 38 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 191 Handle and Feet (page 6- -27) to reinstall the cabinet and rear cover H Line Fuse and Line Cord (page 6- -26) to reinstall the line cord, which completes the oscilloscope reassembly 6- 39 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 192 Removal and Installation Procedures A05 Attenuator Assembly Mounting Screws (4) Attenuator Shield Figure 6- 14: A05 Attenuator removal 6- 40 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 193 Remove the three T-15 Torx screws securing the monitor assembly to the top of the chassis. (See Figure 6- -15 to locate the screws.) 6- 41 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 194 Handle and Feet (page 6- -27) to reinstall the cabinet and rear cover H Line Fuse and Line Cord (page 6- -26) to reinstall the line cord, which completes the oscilloscope reassembly 6- 42 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 195 Removal and Installation Procedures A26 Monitor Assembly EMI Clip Monitor Frame Mounting Screws (6) Figure 6- 15: A26 Monitor assembly removal 6- 43 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 196 See Figure 6- -16. D1 Bus Board Support (3) A08 Jumper Board Figure 6- 16: A08 Jumper board assembly, D1 Bus, and board supports removal 6- 44 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 197 Slide the board part way out until you can reach the battery cable at J5. Unplug the battery cable. Slide the board the rest of the way out of the main chassis to complete its removal. 6- 45 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 198 H Line Fuse and Line Cord (page 6- -26) to reinstall the line cord, which completes the oscilloscope reassembly Mounting Screw (Short), CPU Assembly Mounting Screw, Unused Board Bracket Mounting Screw, CPU Assembly A03 CPU Assembly Figure 6- 17: A03 CPU removal 6- 46 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 199 Handle and Feet (page 6- -27) to reinstall the cabinet and rear cover H Line Fuse and Line Cord (page 6- -26) to reinstall the line cord, which completes the oscilloscope reassembly 6- 47 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 200 Remove the single T-15 Torx screw from the bracket that secures the DSP assembly at the inside rear corner of the main chassis. 6- 48 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 201 Handle and Feet (page 6- -27) to reinstall the cabinet and rear cover H Line Fuse and Line Cord (page 6- -26) to reinstall the line cord, which completes the oscilloscope reassembly 6- 49 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 202 Unplug the backplane to AUX power cable at J6 of the backplane. e. Unplug the backplane to front panel cable at J8 of the backplane assembly. Unplug the backplane to low voltage power cable at J7 of the backplane assembly. 6- 50 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 203 While holding the flex lock, slightly pull up on the front corner of the board nearest that retainer until the board clears that flex lock. Repeat for the remaining three flex locks. 6- 51 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 204 Handle and Feet (page 6- -27) to reinstall the cabinet and rear cover. H Line Fuse and Line Cord (page 6- -26) to reinstall the line cord, which completes the oscilloscope reassembly. 6- 52 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 205 DSP assembly. Then pull the battery out of its clamp near the front of the chassis to remove. 5. Remove the battery retaining clip: If replacement of the battery clip is necessary, remove the T15 TorxR screw mounting the clip to the chassis. 6- 53 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 206 Handle and Feet (page 6- -27) to reinstall the cabinet and rear cover H Line Fuse and Line Cord (page 6- -26) to reinstall the line cord, which completes the oscilloscope reassembly 6- 54 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 207 See Figure 6- -22 for hardware locations. Do not remove the inner two screws. These two screws secure the circuit board to the mounting bracket. 6- 55 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 208 Lift the Power Factor Module assembly up and at the same time disconnect the two conductor flex cable (line trigger) from the power supply. 6- 56 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 209 Disconnect J3 FAN PWR two conductor (black and red) connector located on the small low voltage power supply board. e. Disconnect J7, 8 conductor flex cable located on the small low voltage power supply board. 6- 57 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 210 Once released, tilt the board out away from the flex locks. Lift the low voltage power supply assembly out of the chassis to complete its removal. 6- 58 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 211 See the following procedures to replace the modules removed by the access procedure. H Front Cover, Rear Cover, Cabinet, Rear EMI Gasket, and Cabinet Handle and Feet (page 6- -27) to reinstall the cabinet and rear cover. 6- 59 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 212 AC power cable where it connects to the cable from the low voltage power supply. Lift the low voltage power supply assembly out of the chassis to complete its removal. 6- 60 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 213 Place the digitizing oscilloscope so its left side is down with its top facing you. b. Depress the two retainer locks and slide the power-supply mount towards the top of the digitizing oscilloscope to unlock from the chassis. 6- 61 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 214 Handle and Feet (page 6- -27) to reinstall the cabinet and rear cover. H Line Fuse and Line Cord (page 6- -26) to reinstall the line cord, which completes the oscilloscope reassembly. 6- 62 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 215 Move the fan mount inward so its retainer lugs are out of the large retainer holes and lift it out of the chassis to remove. 6- 63 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 216 See the following procedures to replace the modules removed by the access procedure: H Front Cover, Rear Cover, Cabinet, Rear EMI Gasket, and Cabinet Handle and Feet (page 6- -27) to reinstall the cabinet and rear cover 6- 64 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 217 Remove the two screws mounting the line filter to the chassis. Pull the filter out through the rear of the chassis to complete the removal. Figure 6- 26: Line filter removal 6- 65 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 218 Handle and Feet (page 6- -27) to reinstall the cabinet and rear cover H Line Fuse and Line Cord (page 6- -26) to reinstall the line cord, which completes the oscilloscope reassembly 6- 66 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 219 Then, pull up on the board to release it from the two retainers. Lift the board out of the chassis to complete the removal. 6- 67 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 220 Perform in reverse order substeps 4a- -4e reversing the removal instruc- tions in each substep to reinstall the assembly. Be sure to seat the board until the two mounting posts snap locked on the assembly when reinstalling. 6- 68 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 221 Unsolder the wire from the AUX TRIGGER/EXT CLOCK BNC. c. Remove the six screws securing the acquisition assembly to the bottom of the chassis, and lift out the acquisition assembly to complete its removal. 6- 69 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 222 Handle and Feet (page 6- -27) to reinstall the cabinet and rear cover H Line Fuse and Line Cord (page 6- -26) to reinstall the line cord, which completes the oscilloscope reassembly 6- 70 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 223 A25 Low Voltage Power Supply and its Mount (page 6- -57) h. A26 Monitor Assembly (page 6- -41) A07 Auxiliary Power Supply B010100 - - B079999 (page 6- -67) Line Filter (page 6- -65) 6- 71 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 224 A03 CPU Assembly (page 6- -45) h. Line Fuse and Line Cord (page 6- -26) A08 Jumper Board Assembly, D1 Bus, and Board Supports (page 6- -44) Line Filter (page 6- -65) 6- 72 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 225 Flex Circuits (page 6- -35) r. Front Cover, Rear Cover, Cabinet, Rear EMI Gasket, and Cabinet Handle and Feet (page 6- -27) s. Line Fuse and Line Cord (page 6- -26) 6- 73 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 226 Removal and Installation Procedures 6- 74 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 227 Repeatedly press the main-menu button Area until All is highlighted in the menu that pops up. 2. Run the System Diagnostics: Press the main-menu button Execute; then press the side-menu button OK Confirm Run Test. 6- 75 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 228 If you want to order a firmware update, see Optional Accessories in Chapter 10 Mechanical Parts List for the part number. Flip both switch levers toward the board (closed) to enable updating of firmware. Figure 6- 29: Accessing the protection switch 6- 76 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 229 DB-25 adaptor, null modem adaptor, gender changer adaptor, and an extension cable to connect the console port to your personal computer (see Figure 6- -30 on page 6- -79). 2. Prerequisites: Power off the oscilloscope. 6- 77 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 230 Configure port parameters: Set the telecommunication software (or terminal) parameters: H Baud Rate 9600 H Parity None H Data Bits H Stop Bits H Duplex Full H Protocol None 6- 78 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 231 6. Use the console port: Power up the oscilloscope. Diagnostic messages are echoed to the personal computer display. Console Port Tektronix part number 174-2613-00 Extension Cable Figure 6- 30: Console port connections 6- 79 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 232 Note: Set all the switches of S1 back to the closed power.! position and cycle power before performing another procedure. Figure 6- 31: Primary Troubleshooting Procedure 6- 80 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 233 Troubleshooting Pin 3 Pin 1 Pin 32 Figure 6- 32: A03 CPU Board Connector P1 6- 81 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 234 Table 6- - 10. Does the display report Done. any errors? Select the next module from Table 6- - 10. Figure 6- 33: Module Isolation Troubleshooting Procedure 6- 82 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 235 Cable Module Attn Board Cables Cal Initialization Cpu/Dsp or AT bus Cpu/Dsp/Dsy or D1 bus Cpu/Dsp/Dsy or AT bus Cpu/Attn or I2C bus Attn Cpu/Acq, D1/I2C bus Acq/Attn Fp/Cpu 6- 83 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 236 (see Voltage Power Supply. Table 6- - 11 and Figure 6- - 36)? Perform the Power Supply Overload troubleshooting procedure. Figure 6- 34: Low Voltage Power Supply Troubleshooting Procedure 6- 84 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 237 +15 V +14.85 V +15.15 V - - 6.4 V - - 6.35 V - - 6.45 V - - 15 V - - 14.85 V - - 15.15 V 6- 85 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 238 Replace the A25 Low Voltage specification shown in power supply secondary. Power Supply. Table 6- - 12? Check and repair the circuit. Figure 6- 35: Power Supply Overload Troubleshooting Procedure 6- 86 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 239 5.5 A - - 15 V 1 and 2 0.75 A Pin 1 A25 Low Voltage Power Supply Figure 6- 36: A25 Low Voltage Power Supply Module (Right Side) 6- 87 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 240 Perform the Low Voltage Power Supply troubleshooting procedure. Replace the D1 Bus cable, A03 CPU, the problem A09 DSP, or fixed? A01 Backplane Assembly. Done. Figure 6- 37: Monitor Troubleshooting Procedure 6- 88 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 241 Figure 6- 38: Horizontal and Vertical Sync Signals White Level J2 pin 7 (Video) Black Level Blanking Level Figure 6- 39: A Video Signal with White, Black, and Blanking Levels 6- 89 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 242 Troubleshooting J440 Figure 6- 40: A26 Monitor Connector J440 Pin 1 Pin 1 Figure 6- 41: A07 Auxiliary Power Connectors J4 and J7 6- 90 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 243 Troubleshooting Pin 1 Figure 6- 42: A02 Display Connector J2 6- 91 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 244 The A06 Front Panel sockets and are the cables. board is ok. cables ok? Replace the A03 CPU board. Figure 6- 43: Processor/Front Panel Troubleshooting Procedure 6- 92 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 245 Pins 2 and 4 5.1 V J106 Pin 1 15 V J106 Pin 2 5.1 V J106 Pin 4 - - 5 V J106 Pin 5 - - 15 V 6- 93 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 246 (see page 6- - 44), remove the amplitude? A08 Jumper board. Replace the A04 Acquisition board or the A08 Jumper board. Figure 6- 45: Attenuator/Acquisition Troubleshooting Procedure 6- 94 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 247 Figure 6- 46: A08 Jumper and A05 Attenuator Boards Signal Locations Table 6- 14: Channel and P1 Signal Locations Trigger Vertical Vertical Inverted Channel Number P1 Pin Number P1 Pin Number P1 Pin Number 6- 95 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 248 - - 6.4 V - - 6.0 V - - 6.5 V +15 V +15.3 V +14.7 V - - 15 V - - 14.7 V - - 15.3 V 6- 96 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 249 - - 6.6 V +5 V +5.15 V +4.9 V +15 V +15.3 V +14.7 V A04 Acquisition Board Pin 1 Figure 6- 48: A04 Acquisition Board Power Connector 6- 97 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 250 Replace the A01 Backplane intermittent module. problems? There is not a problem there still with the problems? A01 Backplane. Replace the A01 Backplane module. Figure 6- 49: Backplane Troubleshooting Procedure 6- 98 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 251 +5 V +5.05 V +5.15 V - - 5 V - - 5.05 V - - 5.2 V - - 15 V - - 14.85 V - - 15.15 V 6- 99 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 252 Troubleshooting Pin 1 Pin 1 Pin 1 Pin 1 Pin 1 Figure 6- 50: A01 Backplane Module 6- 100 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 253 Power on the oscilloscope. The A01 Backplane was Repeat the procedure or contact your local bad. Tektronix service center. Figure 6- 51: I2C Isolation Troubleshooting Procedure 6- 101 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 254 A03 CPU, the the A02 Display, and the A09 DSP, the A02 Display, and the A01 Backplane modules. A01 Backplane modules. Figure 6- 52: Console Troubleshooting Procedure 6- 102 TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 255: Options And Accessories

    See Option XL. Math Option XL: Options 02, 13, With this option, Tektronix ships a front cover and pouch, RS-232 and a 1M, and 2F Centronics interface that can be used to obtain hardcopies of the oscilloscope screen, a 120,000 Point Record Length, and advanced DSP math (the oscillo-...

  • Page 256: Standard Accessories

    Options and Accessories Options A1- A5: Besides the standard North American, 110 V, 60 Hz power cord, Tektronix ships International Power Cords any of five alternate power cord configurations (listed in Table 7- -1) with the oscilloscope when ordered by the customer.

  • Page 257: Optional Accessories

    Table 7- 4: Compatible Probes Probe Type Tektronix Model Description Passive, high impedance voltage P6138A 10X, 400 MHz P6101B 1X, 15 MHz Passive, SMD P6563A 20X, 500 MHz 7- 3 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 258 Active, high speed voltage P6243 DC to 1 GHz FET, TekProbe powered P6204 DC to 1 GHz FET, DC Offset capability (requires Tektronix 1103 TekProbe Power Supply for offset capability) Active, differential voltage P6046 1X/10X, 250 V, DC to 100 MHz...
  • Page 259 The warranty statement for this product is after the title page of this manual. Service Assurance Tektronix offers the following services that you can purchase any time during the warranty period of this product: H REP (Repair) Service Assurance provides one year of post-warranty repair support.
  • Page 260 Options and Accessories 7- 6 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 261 The modules that make up this instrument are often a combination of mechanical and electrical subparts. Therefore, all replaceable modules are listed in Chap- ter 10, Mechanical Parts List. Refer to that chapter for part numbers when using this manual. 8- 1 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 262 Electrical Parts List 8- 2 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 263 A tilde (~) preceding a signal name or an asterisk following a signal name indicates that the signal performs its intended function when in the low state. Other Tektronix, ANSI, and military standards are also used in the preparation of diagrams by Tektronix, Inc.
  • Page 264 LINE FILTER FOR THESE BOARDS. # THESE REPLACEABLE CABLES ARE LISTED IN SECTION 10. 2 PINS 2 PINS AUXILIARY POWER Figure 9- 1: TDS 400A Interconnections, B010100 - B079999 9- 2 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 265 98 PINS 98 PINS A10 SERPAR 8 PINS DISPLAY 22 PINS 10 PINS J901 10 PINS A01 BACKPLANE A26 MONITOR Figure 9- 2: TDS 400A Interconnections, B010100 - B079999 (Cont) 9- 3 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 266 BATTERY PROBE ADJ PROBE COMPENSATION FRONT PANEL LINE FILTER FL52 POWER LOW VOLTAGE POWER SUPPLY SWITCH POWER BACKPLANE FUSE Figure 9- 3: TDS 400A Block Diagram, B010100 - B079999 9- 4 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 267 MONITOR ASSEMBLY VIDEO DISPLAY VIDEO MONITOR 7V, 2A FUSED OPTION 13 RS-232 DTE PORT CENTRONICS A10 SERPAR COMPATIBLE Figure 9- 4: TDS 400A Block Diagram, B010100 - B079999 (Cont) 9- 5 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 268 * NO BLOCK DIAGRAMS FOR THESE BOARDS. 2 PINS LINE FILTER # THESE REPLACEABLE CABLES ARE LISTED IN SECTION 10. PFC MODULE Figure 9- 5: TDS 400A Interconnections, B080000 & up 9- 6 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 269 50 PINS 98 PINS 98 PINS 8 PINS DISPLAY 22 PINS 10 PINS J901 A01 BACKPLANE 10 PINS A26 MONITOR Figure 9- 5: TDS 400A Interconnections, B080000 & up (Cont.) 9- 7 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 270 POTS BATTERY PROBE ADJ PROBE COMPENSATION FRONT PANEL PFC MODULE LOW VOLTAGE POWER SUPPLY LINE FILTER BACKPLANE FL52 FUSE Figure 9- 6: TDS 400A Block Diagram, B080000 & up 9- 8 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 271 MONITOR ASSEMBLY VIDEO DISPLAY VIDEO MONITOR 7V, 2A FUSED BACKPLANE OPTION 13 RS-232 DTE PORT CENTRONICS A10 SERPAR COMPATIBLE Figure 9- 6: TDS 400A Block Diagram, B080000 & up (Cont.) 9- 9 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 272 Diagrams 9- 10 TDS 420A, TDS 430A & TDS 460A Service Manual...

  • Page 273: Replaceable Parts

    670-7918-03 670-7918-XX When you order parts, Tektronix will provide you with the most current part for your product type, serial number, and modification (if applicable). At the time of your order, Tektronix will determine the part number revision level needed for your product, based on the information you provide.

  • Page 274: Using The Replaceable Parts List

    Module Servicing 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 reman- ufactured module. These modules cost significantly less than new modules and meet the same factory specifications.
  • Page 275 30817 INSTRUMENT SPECIALTIES CO INC EXIT 53 RT 80 DELAWARE WATER GAP PA 18327 BOX A 34416 PARSONS MFG CORP 1055 OBRIAN DR MENLO PARK CA 94025- - 1408 10- 3 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 276 3000 COLUMBIA HOUSE BLVD #120 0KB01 STAUFFER SUPPLY CO 810 SE SHERMAN PORTLAND, OR 97214- - 4657 TK0588 UNIVERSAL PRECISION PRODUCT 1775 NW CORNELIUS PASS RD HILLSBORO, OR 97124 10- 4 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 277 334- - 8820- - 00 MARKER,IDENT:BEZEL (TDS460A ONLY) 80009 334882000 334- - 8821- - 00 MARKER,IDENT:BEZEL (TDS420A ONLY) 80009 334882100 334- - 9232- - 00 MARKER,IDENT:BEZEL (TDS430A ONLY) 80009 334923200 10- 5 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 278 - - 31 105- - 1081- - 00 BRKT,ADAPTER:FLOPPY DISK DRIVE TK1163 105108100 211- - 0866- - 01 SCREW,PHIL, M2.5 x 10, PNH, BRZN 0KB01 211- - 0866- - 01 10- 6 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 279 Figure 10- 1: External and front panel modules 10- 7 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 280 CIRCUIT BD ASSY:BACKPLANE 80009 671167605 - - 26 200- - 3660- - 00 COVER,AUTO CAL:POLYCARBONATE TK1163 ORDER BY DESC - - 27 441- - 2072- - 01 CHASSIS ASSY:ALUMINUM 80009 441207200 10- 8 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 281 Figure 10- 2: Internal modules (B010100 - B079999) 10- 9 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 282 CIRCUIT BD ASSY:BACKPLANE 80009 671167605 - - 28 200- - 3660- - 00 COVER,AUTO CAL:POLYCARBONATE TK1163 ORDER BY DESC - - 29 441- - 2072- - 01 CHASSIS ASSY:ALUMINUM 80009 441207200 10- 10 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 283 Figure 10- 3: Internal modules (B080000 - Up) 10- 11 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 284 174- - 2278- - 00 - - 13 174- - 3135- - 00 CABLE ASSY,SP:FLAT,FLX,26,1MM,15.0L 80009 174313500 (DISK DRIVE) - - 14 174- - 2284- - 00 CA ASSY,SP,ELEC:FLAT FLEX,8.8L 80009 174228400 10- 12 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 285 Figure 10- 4: Cables and routing (B010100 - B079999) 10- 13 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 286 174- - 2278- - 00 - - 10 174- - 3135- - 00 CABLE ASSY,SP:FLAT,FLX,26,1MM,15.0L 80009 174313500 (DISK DRIVE) - - 11 174- - 2284- - 00 CA ASSY,SP,ELEC:FLAT FLEX,8.8L 80009 174228400 10- 14 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 287 Figure 10- 5: Cables and routing (B080000 - Up) 10- 15 TDS 420A, TDS 430A & TDS 460A Service Manual...
  • Page 288 MANUAL,TECH:RS- - 232/CENTRONICS 80009 0708567XX (OPTION 13 ONLY) 070- - 8722- - XX MANUAL,TECH:INSTRUCTION 80009 0708722XX (TDS4F5P ONLY) 070- - 8762- - XX MANUAL,TECH:USER,VIDEO DISPLAY 80009 0708762XX (OPTION 05 ONLY) 10- 16 TDS 420A, TDS 430A & TDS 460A Service Manual...

This manual is also suitable for:

Tds 460aTds 430a

Table of Contents