Page 1 Service Manual TDS 410A, TDS 420A & TDS 460A Digitizing Oscilloscopes 070-9217-01 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 the Safety Summary prior to...
Page 2 Copyright 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 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 5 ..........4–53 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 6 ........10–2 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 7: Table Of Contents
....... 5–13 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 8 ....6–64 Figure 6–26: Accessing the Protection Switch ....6–70 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 9 ......10–11 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 10 ....... 4–22 Table 4–3: Analog Bandwidth (TDS 410A and TDS 420A) ..
Page 11 ....... 7–7 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 12 Table of Contents viii TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 13 Product Damage Precautions Use Proper Power Source Do not operate this product from a power source that applies more than the voltage specified. Provide Proper Ventilation To prevent product overheating, provide proper ventilation. TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 14 CAUTION indicates a hazard to property including the product. Symbols on the Product The following symbols may appear on the product: Double DANGER Protective Ground ATTENTION Insulated High Voltage (Earth) Terminal Refer to Manual TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 15 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 410A, TDS 420A & TDS 460A Service Manual...
Page 16 Service Safety Summary TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 17 This service manual provides service information for the TDS 410A, TDS 420A, and TDS 460A Digitizing Oscilloscopes. STOP. If servicing a TDS 410A, follow the procedures for the TDS 420A, 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 410A, TDS 420A & TDS 460A Service Manual...
Page 19 Preface Related Manuals These other manuals are available for the TDS 410A, TDS 420A, and TDS 460A Digitizing Oscilloscopes. The Reference gives you a quick overview of how to operate your oscillo- scope. The User Manual provides instructions on how to operate your oscilloscope.
Page 20 Preface TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 21 Tektronix. Before Servicing This manual is for servicing the TDS 410A, TDS 420A, & TDS 460A Digitizing Oscilloscopes. To prevent injury to yourself or damage to the oscilloscope, do the following before you attempt service:...
Page 22 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 23 Oscilloscopes. You can purchase such agreements to span several years. Self Service Tektronix supports repair to the module level by providing Module Exchange and Module Repair and Return. Module Exchange. This service reduces down time for repair by allowing you to exchange most modules for remanufactured ones.
Page 24 Introduction TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 26: Table 1-1: Key Features Of The Tds 400A Oscilloscopes
Hardcopy output using GPIB and, with Option 13, RS-232 or 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 410A, TDS 420A & TDS 460A Service Manual...
Page 27 100 MHz, and 20 MHz bandwidth. Such icons allow you to more readily determine status or the available settings. 1–2 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 28: Table 1-2: Record Length Vs. Divisions Per Record
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 410A, TDS 420A & TDS 460A Service Manual...
Page 29 You can use peak-detect, high-resolution, sample, envelope, and average modes to acquire signals. 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 410A, TDS 420A & TDS 460A Service Manual...
Page 30 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 410A, TDS 420A & TDS 460A Service Manual...
Page 31 An important component of the multiprocessor architecture of this digitizing (DSP) oscilloscope is Tektronix proprietary digital signal processor, the DSP. This dedicated processor supports advanced analysis of your waveforms when doing such compute-intensive tasks as interpolation, waveform math, and signal averaging.
Page 32 By using ZOOM, you can magnify the waveform parameter using the vertical and horizontal controls to expand (or contract) and position it for viewing. 1–7 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 33 Product Description 1–8 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 34: Table 1-3: Nominal Traits - Signal Acquisition System
Table 1–3: Nominal Traits — Signal Acquisition System Name Description Bandwidth Selections 20 MHz, 100 MHz, and FULL (TDS 410A and TDS 420A: 200 MHz, TDS 460A: 400 MHz) Digitizers, Number of TDS 410A: Two, both identical TDS 420A and TDS 460A: Four, all identical...
Page 35 1% of the more sensitive setting. For example, between 50 mV/div and 100 mV/div, the volts/division can be set with 0.5 mV resolution. Rise time is defined by the following formula: Rise Time (ns) BW (MHz) 1–10 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 36: Table 1-4: Nominal Traits - Time Base System
Table 1–5: Nominal Traits — Triggering System Name Description Range, Events Delay 1 to 9,999,999 Ranges, Trigger Level or Threshold Source Range Any Channel 12 divisions from center of screen Line 400 Volts 1–11 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 37: Table 1-6: Nominal Traits - Display System
1.25 (UL 198.6, 3AG): 5 A FAST, 250 V, or a 5 mm 20 mm, (IEC 127): 4 A (T), 250 V VGA compatible at 30.6 kHz sync rate. Each fuse type requires its own fuse cap. 1–12 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 38: Table 1-9: Nominal Traits - Mechanical
4.5 kg (10 lbs), for Printer Pack when packaged for domestic shipping; includes a pouch, a printer as received from the vendor, a Tektronix manual, cables, and five rolls of paper 1–13...
Page 39 472 mm (18.6 in), without front-panel handles; 517 mm (20.35 in), with front-panel handles installed Option 3P Height 241 mm (9.5 in) Width 381 mm (15.0 in) Depth 569 mm (22.4 in) 1–14 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 40: Figure 1-1: Tds 400A Dimensional Drawing
471 mm 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 1–15 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 41 Nominal Traits 1–16 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 42: Table 1-10: Warranted Characteristics - Signal Acquisition System
| + ( 15 mV + 0.1 div Vertical Scale)) 1 V/div–10 V/div (0.4% |Net Offset | + (150 mV + 0.1 div Vertical Scale) Accuracy, Position (1.5% (Position Volts/div) + Offset Accuracy + 0.04 div) 1–17 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 43 5 V (DC + peak AC) is reached Input Voltage, Maximum, , with peaks less than or equal to 30 V DC-50 or AC-50 Coupled 1–18 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 44: Table 1-11: Warranted Characteristics - Time Base System
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 1–11. 1–19 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 45: Table 1-12: Warranted Characteristics - Triggering System
20 ns Sensitivity, Edge-Type Trigger, DC 0.35 division from DC to 50 MHz, increasing to 1 division at 350 MHz (TDS 410A and Coupled TDS 420A) or 500 MHz (TDS 460A) for any channel as trigger source Sensitivity, Video-Type, TV Field and TV 0.6 division of video sync signal...
Page 46: Table 1-15: Warranted Characteristics - Environmental, Safety, And Reliability
European Community Requirements EN55022 Radiated Emissions Class B EN55022 Conducted Emissions Class B With Option 3P: VDE 0871, Category B, Vfg. 1046/1984 FCC Rules and Regulations, Part 15, Subpart B, Class A 1–21 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 47 (braid and foil) GPIB cable. The cable shield must have low impedance connections to both connector housings. Acceptable cables are Tektronix part numbers 012-0991-00, -01, and -02. To maintain emission requirements when connecting to the VGA-compatible video output of this oscilloscope, use only a high-quality double-shielded (braid and foil) video cable with ferrite cores at both ends.
Page 48: Table 1-16: Typical Characteristics - Signal Acquisition System
Standard-Accessory Probe Attached ta a A esso o e Atta he 5 mV/div–10 V/div DC–200 MHz 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 410A, TDS 420A & TDS 460A Service Manual...
Page 49: Table 1-17: Typical Characteristics - Time Base System
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 1–11. You set the maximum external clock rate using the Horizontal Clock menu. 1–24 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 50: Table 1-18: Typical Characteristics - Triggering System
PAL and SECAM 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 410A, TDS 420A & TDS 460A Service Manual...
Page 51: Table 1-19: Typical Characteristics - Data Handling
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 410A, TDS 420A & TDS 460A Service Manual...
Page 53 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 410A, TDS 420A & TDS 460A Service Manual...
Page 54: Table 2-1: Power-Cord Conductor Identification
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 1–20 for those ranges. 2–2 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 55 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 410A, TDS 420A & TDS 460A Service Manual...
Page 56: Table 2-3: Effects Of Corrupted Data
(Chapter 5) 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 410A, TDS 420A & TDS 460A Service Manual...
Page 57 (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 58 Installation 2–6 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 59 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 410A, TDS 420A & TDS 460A Service Manual...
Page 60: Figure 2-1: Map Of Display Functions
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 410A, TDS 420A & TDS 460A Service Manual...
Page 61 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 410A, TDS 420A & TDS 460A Service Manual...
Page 62 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 410A, TDS 420A & TDS 460A Service Manual...
Page 63 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 410A, TDS 420A & TDS 460A Service Manual...
Page 64 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 410A, TDS 420A & TDS 460A Service Manual...
Page 65 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 410A, TDS 420A & TDS 460A Service Manual...
Page 66 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 410A, TDS 420A & TDS 460A Service Manual...
Page 67 From the Utility menu, you can configure the GPIB port (talk/listen, address, etc.) and access internal routines for self diagnostics and self compensation. Instructions for setting up communication over the GPIB are found in the Adjustment Procedures, starting on page 5–1. 2–15 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 68 Operating Information 2–16 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 70 Theory of Operation This section describes the electrical operation of the Tektronix TDS 410A, TDS 420A, and TDS 460A Digitizing Oscilloscopes using the major circuit blocks or modules. This section has two main parts: Logic Conventions describes how logic functions are discused and represented in this manual.
Page 71 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 410A, TDS 420A & TDS 460A Service Manual...
Page 72 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. 3–3 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 73 Theory of Operation 3–4 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 75 If you are not familiar with operating this oscilloscope, read Operating Informa- tion in Chapter 2 of this manual. These instructions will acquaint you with the use of the front-panel controls and the menu system. 4–1 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 76 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 410A, TDS 420A & TDS 460A Service Manual...
Page 77: Figure 4-1: Map Of Display Functions
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 410A, TDS 420A & TDS 460A Service Manual...
Page 78 Performance Verification Procedures 4–4 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 79 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 410A, TDS 420A & TDS 460A Service Manual...
Page 80: Figure 4-2: Verifying Adjustments And Signal Path Compensation
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 410A, TDS 420A & TDS 460A Service Manual...
Page 81 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 inch, 720 K or 1.44 Mbyte floppy disk. 4–7 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 82: Figure 4-3: Universal Test Hookup For Functional Tests
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 410A, TDS 420A & TDS 460A Service Manual...
Page 83 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 410A, TDS 420A & TDS 460A Service Manual...
Page 84 Press the main-menu button Recall Factory Setup; then press the side-menu button OK Confirm Factory Init. c. Modify default settings: Press AUTOSET to obtain a viewable, triggered display. Set the horizontal SCALE to 200 s. 4–10 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 85 Press the side-menu button OK Confirm Factory Init. c. Modify default settings: Press AUTOSET to obtain a viewable, triggered display. Set the horizontal SCALE for the M (main) time base to 200 s. Press VERTICAL MENU. 4–11 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 86 The trigger-level readout for the delayed trigger system changes when you rotate the general purpose knob. 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 410A, TDS 420A & TDS 460A Service Manual...
Page 87 TEK00000.SET your file. If you ran the procedure again, the digitizing oscilloscope would increment the name and call the file TEK00001.SET c. Press the side-menu button Save To Selected File. 4–13 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 88 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 410A, TDS 420A & TDS 460A Service Manual...
Page 89 20 minutes, and must be operating at an ambient temperature between 0 C and +50 C. (The warm-up requirement is usually met in the course of meeting the prerequisites listed above.) 4–15 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 90: Table 4-1: Test Equipment
Amplitude range: 6 mVp-p to 2 V with NRV-Z8 power sensor and Trigger Sensitivity 13. Splitter, Power Frequency range: DC to 1 GHz. Rohde & Schwarz RVZ Checking Analog Bandwidth Tracking: >2.0% 4–16 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 91 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 BNC), Tektronix part number 011-0069-02.
Page 92 450 ps 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 410A, TDS 420A & TDS 460A Service Manual...
Page 93 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 410A, TDS 420A & TDS 460A Service Manual...
Page 94: Figure 4-4: Initial Test Hookup
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 Coaxial Cables Figure 4–4: Initial Test Hookup 4–20 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 95 Press MEASURE. 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 410A, TDS 420A & TDS 460A Service Manual...
Page 96: Table 4-2: Dc Offset Accuracy
One BNC T connector (Item 8) (Averaged) One DC calibration generator (Item 10) Two precision coaxial cables (Item 5) Prerequisites The oscilloscope must meet the prerequisites listed on page 4–15 4–22 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 97: Figure 4-5: Initial Test Hookup
Press SHIFT and then ACQUIRE MENU. Press the main-menu button Mode; then press the side-menu button Average 16. Press DISPLAY. Press the main-menu button Graticule; then press the side-menu button Frame. 4–23 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 98 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 410A, TDS 420A & TDS 460A Service Manual...
Page 99 Factory Setup. Press the side-menu button OK Confirm Factory Init. b. Modify the default settings: Press TRIGGER MENU. Press the main-menu button COUPLING; then press the side menu button Noise Rej. 4–25 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 100: Figure 4-6: Initial Test Hookup
Press WAVEFORM OFF to remove the channel just confirmed from display. Press the front-panel button that corresponds to the channel you are to confirm. Move the leveled output of the sine wave generator to the channel you select. 4–26 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 101: Table 4-3: Analog Bandwidth (Tds 410A And Tds 420A)
Set the vertical scale: Set the vertical SCALE to one of the settings listed in Table 4–3 (TDS 410A and TDS 420A) or Table 4–4 (TDS 460A) not yet checked. (Start with the 100 mV setting.) Table 4–3: Analog Bandwidth (TDS 410A and TDS 420A)
Page 102: Table 4-4: Analog Bandwidth (Tds 460A)
Table 4–4 (TDS 460A) that corresponds to the vertical scale set in substep d. Set the horizontal SCALE to 5 ns (TDS 410A and TDS 420A) or 2 ns (TDS 460A). Press SET LEVEL TO 50% as necessary to trigger the display.
Page 103: Figure 4-7: Measurement Of Analog Bandwidth
STOP. Checking the bandwidth of each channel at all vertical scale settings is time consuming and unnecessary. You may skip checking the remaining vertical scale settings in Table 4–3 (TDS 410A and TDS 420A) or Table 4–4 (TDS 460A) (that is, skip the following substep, h) if this digitizing oscilloscope has...
Page 104 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 410A and TDS 420A) or Table 4–4 (TDS 460A) for the channel under test.
Page 105: Figure 4-8: Initial Test Hookup
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 410A, TDS 420A & TDS 460A Service Manual...
Page 106 Performance Tests c. If you are testing a TDS 410A, skip to step h. d. Save a CH 3 waveform: Move the coupler from CH 2 to CH 3, so that CH 1 and CH 3 are driven. Press CH 3; then press the side-menu button To Ref 3.
Page 107: Figure 4-9: Measurement Of Channel Delay
CHECK that the cursor readout on screen is 200 ps. If you are testing a TDS 410A, skip to step 3. Press WAVEFORM OFF twice to turn off CH 1 and Ref 2; then press CH 4 to turn on CH 4.
Page 108: Figure 4-10: Initial Test Hookup
Attenuator (if necessary) Coaxial Cable Figure 4–10: Initial Test Hookup b. Initialize the oscilloscope: Press save/recall SETUP. Press the main-menu button Recall Factory Setup. Press the side-menu button OK Confirm Factory Init. 4–34 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 109 Mode; then press the side-menu button Sample. Press MEASURE. Press the main-menu button Remove Measurement; then press the side-menu button Measurement 1. Set the horizontal SCALE of the Main time base to 100 ns. 4–35 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 110 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 410A, TDS 420A & TDS 460A Service Manual...
Page 111: Figure 4-11: Measurement Of Accuracy - Long-Term And Delay-Time
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 410A, TDS 420A & TDS 460A Service Manual...
Page 112: Figure 4-12: Initial Test Hookup
CH 1 (see Figure 4–12). Digitizing Oscilloscope Output Sense DC Calibrator Dual Banana to BNC Adapters BNC T Connector Coaxial Cables Figure 4–12: Initial Test Hookup b. Initialize the oscilloscope: Press save/recall Setup. 4–38 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 113 Select the Delayed time base: Press HORIZONTAL MENU. Press the main-menu button Time Base. Press the side-menu buttons Delayed Only and Delayed Triggerable. Set D (delayed) horizontal SCALE to 500 s. 4–39 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 114 1. Install the test hookup and preset the oscilloscope controls: a. Initialize the oscilloscope: Press save/recall SETUP. Press the main-menu button Recall Factory Setup. Press the side-menu button OK Confirm Factory Init. 4–40 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 115: Figure 4-13: Initial Test Hookup
Figure 4–13: Initial Test Hookup 2. Confirm Main and Delayed trigger systems are within sensitivity limits (50 MHz): a. Display the test signal: Set the generator frequency to 50 MHz. Press MEASURE. 4–41 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 116 (Use the side menu to switch between trigger slopes; use the trigger MAIN LEVEL knob to stabilize the trigger if required.) Leave the Main trigger system triggered on the positive slope of the waveform before continuing to the next step. 4–42 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 117: Figure 4-14: Measurement Of Trigger Sensitivity
(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 410A, TDS 420A & TDS 460A Service Manual...
Page 118 Press the side-menu button Main Only. c. Display the test signal: Set the generator frequency to 350 MHz (TDS 410A and TDS 420A) or 500 MHz (TDS 460A). 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 119: Figure 4-15: Initial Test Hookup
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 410A, TDS 420A & TDS 460A Service Manual...
Page 120: Figure 4-16: Confirming Auxiliary Triggering At Maximum Triggering Frequency
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 410A, TDS 420A & TDS 460A Service Manual...
Page 121: Figure 4-17: Initial Test Hookup
75 terminator, the output of a NTSC format video generator to CH 1 (see Figure 4–17). Digitizing Oscilloscope Video Generator Output Terminators Figure 4–17: Initial Test Hookup 4–47 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 122 Press the main menu button Fine Scale. Use the General Purpose knob, adjust the fine gain until the sync pulse amplitude is 0.6 divisions measured using the graticule (see Figure 4–18). 4–48 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 123: Figure 4-18: Adjusting Sync Pulse Amplitude
TV line duration (63.5 s), then it is the end of field 2 — see waveform R1 in Figure 4–19.) Press the side menu button Even. Center the display at mid screen. 4–49 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 124: Figure 4-19: Measurement Of Video Sensitivity
(63.5 s and 31.75 s respectively), then triggering is occurring on both fields — see waveforms R3 and R4 in Figure 4–19.) d. Check delay by lines: Press the main-menu button Scan. 4–50 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 125 1. Install the test hookup and preset the instrument controls: a. Initialize the oscilloscope: Press save/recall SETUP. Press the main-menu button Recall Factory Setup. Press the side-menu button OK Confirm Factory Init. 4–51 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 126: Figure 4-20: Initial Test Hookup
Modify the default settings: Press HORIZONTAL MENU, then press the Clock main- menu button. Press the side-menu button External. Set the Max Ext Clock Rate to 10.0 MHz. Press CLEAR MENU. 4–52 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 127 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 410A, TDS 420A & TDS 460A Service Manual...
Page 128: Figure 4-21: Initial Test Hookup
(its icon is shown at the left). Press the side-menu button Amplitude. 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 410A, TDS 420A & TDS 460A Service Manual...
Page 129: Figure 4-22: Measurement Of Probe Compensator Limits
Some procedures in this manual require a sine wave generator to produce the necessary test signals. 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 410A, TDS 420A & TDS 460A Service Manual...
Page 130: Figure 4-23: Sine Wave Generator Leveling Equipment Setup
3. Record the reference level: Note the reading on the level meter. 4. Set the generator to the new frequency and reference level: Change the sine wave generator to the desired new frequency. 4–56 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 131: Figure 4-24: Equipment Setup For Maximum Amplitude
Set the sine wave generator to a reference frequency of 10 MHz. Adjust the sine wave generator amplitude to the required number of divisions as measured by the digitizing oscilloscope. 4–57 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 132 3. The signal amplitude is now correctly set for the new frequency. Disconnect the sine wave generator from the power sensor. Connect the sinewave generator to the digitizing oscilloscope. 4–58 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 134 Adjustment Procedures This chapter contains information needed to adjust the TDS 410A, TDS 420A, & TDS 460A Digitizing Oscilloscopes. Description The Adjustment Procedures are divided into three parts: This general information about adjusting this oscilloscope and the written procedures for installing and using the adjustment software.
Page 135 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 410A, TDS 420A & TDS 460A Service Manual...
Page 136: Table 5-1: Adjustments Required For Module Replaced
Acquisition Board 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 410A, TDS 420A & TDS 460A Service Manual...
Page 137: Table 5-2: Adjustments And Dependencies
Low Frequency Response Adjustment Voltage Reference High Frequency Response Adjustment Voltage Reference (TDS 460A only) Trigger Adjustment Voltage Reference Probe Adjustment Voltage Reference, Low Frequency Response, and High Frequency Response Monitor Adjustment None 5–4 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 138: Table 5-3: Test Equipment, Fixtures, And Supplies
Adjustment Procedures Equipment Required The test equipment required to adjust the TDS 410A, TDS 420A, & TDS 460A Digitizing Oscilloscopes is listed in Table 5–3. Table 5–3: Test Equipment, Fixtures, and Supplies Item Number and Description Minimum Requirements Example Purpose...
Page 139 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 410A, TDS 420A & TDS 460A Service Manual...
Page 140 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 410A, TDS 420A & TDS 460A Service Manual...
Page 141 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 410A, TDS 420A & TDS 460A Service Manual...
Page 142 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 410A, TDS 420A & TDS 460A Service Manual...
Page 143: Figure 5-1: Hookup For Probe Compensation
Press the main-menu button Recall Factory Setup. Press the side-menu button OK Confirm Factory Init. c. Modify the initialized front-panel control settings: Press AUTOSET. Set the horizontal SCALE to 200 s. Press SET LEVEL TO 50%. 5–10 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 144: Figure 5-2: Performing Probe Compensation
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 410A, TDS 420A & TDS 460A Service Manual...
Page 145: Figure 5-3: Proper And Improper Probe Compensation
Measure the Probe Equipment TDS 410A and TDS 420A: one leveled sine wave generator (Item 13) Required Bandwidth TDS 460A: one leveled sine wave generator (Item 14)
Page 146: Figure 5-4: Exposing The Inner Probe Tip
Adapter Tip Adapter Figure 5–5: Initial Test Hookup c. Initialize the oscilloscope: Press save/recall SETUP. Press the main-menu button Recall Factory Setup. Press the side-menu button OK Confirm Factory Init. 5–13 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 147 600 mV (6 division), 10 MHz or less reference signal. (TDS 410A and TDS 420A Only) Set the horizontal SCALE to 2 ns and set the frequency of the generator to 200 MHz. (TDS 460A Only) Set the horizontal SCALE to 1 ns and set the frequency of the generator to 350 MHz.
Page 148 The probe tip should be exposed from the procedure Measure Probe Bandwidth. If not, follow the instructions in Figure 5–4 to expose the probe tip. Follow the instructions in Figure 5–6 to remove the probe body covers. 5–15 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 149 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: Press save/recall SETUP. 5–16 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 150 Press the main-menu button Trigger Position; and press the side-menu button 10%. Push SHIFT. Then press SAVE WAVEFORM. Press the main-menu button Save Waveform. Then press the side-menu button To Ref 1. 5–17 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 151 5 ns than during the entire first 20 ns the adjustments affect. See Figure 5–10 to see what areas on the front corner that the various adjustments affect. 5–18 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 152 If bandwidth is met, adjustment is complete. Skip to step 3. If bandwidth is not met, redo this procedure, increasing front corner overshoot slightly relative to the stored waveform. Repeat this step (d) until bandwidth is met. 5–19 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 153 Figure 5–10: Adjustments vs. Front-Corner Response 3. Disconnect the hookup: Unplug the probe from the BNC to probe tip adapter. Reverse the instructions in Figure 5–4, page 5–13, to reinstall the retractable probe tip. 5–20 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 154 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 410A, TDS 420A & TDS 460A Service Manual...
Page 155 Locate R482 (BRITE) (see Figure 5–11). Adjust R482 until the background raster lines in the 5% luminance patch (see Figure 5–12 on page 5–12) disappear while the lines in the 10% luminance patch are visible. 5–22 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 156 Repeatedly press the side-menu button –more– until White Box appears in the side menu. Push White Box. Press the main-menu button EXECUTE. Then press the side-menu button Ok Confirm Run Test. 5–23 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 157 Press the main-menu button Tests. Repeatedly press the side-menu button –more– until Composite appears in the side menu. Push Composite. Press the main-menu button EXECUTE. Then press the side-menu button Ok Confirm Run Test. 5–24 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 158 Corner Corner 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 410A, TDS 420A & TDS 460A Service Manual...
Page 159 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 410A, TDS 420A & TDS 460A Service Manual...
Page 161 Maintenance This chapter contains the information needed to do periodic and corrective maintenance on the TDS 410A, TDS 420A, & TDS 460A Digitizing Oscillo- scopes. Specifically, the following sections are included: Preparation — General information on preventing damage to internal modules when doing maintenance.
Page 162 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 410A, TDS 420A & TDS 460A Service Manual...
Page 163 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 6–3 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 164 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 410A, TDS 420A, & TDS 460A Digitizing Oscilloscopes. Inspection and cleaning are done as preventive maintenance.
Page 165 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 410A, TDS 420A & TDS 460A Service Manual...
Page 166 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 410A, TDS 420A & TDS 460A Service Manual...
Page 167 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 410A, TDS 420A & TDS 460A Service Manual...
Page 168 Maintenance 6–8 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 169 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. List of Modules Chapter 10 lists all modules. 6–9 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 170 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 410A, TDS 420A & TDS 460A Service Manual...
Page 171 Removal and Installation Procedures NOTE. Read the cleaning procedure before disassembling the oscilloscope for cleaning. Figure 6–1: Oscilloscope Orientation 6–11 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 172 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 410A, TDS 420A & TDS 460A Service Manual...
Page 173 Go to Table 6–6 on page 6–17. Find the procedure that includes the name of the module noted in step1. Perform the access instructions listed for the procedure found to access and remove the module. 6–13 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 174 — 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 410A, TDS 420A & TDS 460A Service Manual...
Page 175 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 410A, TDS 420A & TDS 460A Service Manual...
Page 176 Menu Button 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 410A, TDS 420A & TDS 460A Service Manual...
Page 177 Do the procedure listed at left to remove the module. A07 Auxiliary Power Supply 6–61 Do the procedure listed at left to remove the module. Line Filter 6–59 Do the procedure listed at left to remove the module. 6–17 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 178 6–63 Do A08 Jumper Board Assembly, D1 Bus, and Board Supports (see page 6–43). Do not remove the board supports. Do the procedure listed at left to remove the module. 6–18 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 179 Board Support (3) A01 Backplane Battery (2) Assembly 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 410A, TDS 420A & TDS 460A Service Manual...
Page 180 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 410A, TDS 420A & TDS 460A Service Manual...
Page 181 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 410A, TDS 420A & TDS 460A Service Manual...
Page 182 Backplane to Acquisition Backplane to (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 6–22 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 183 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. 6–23 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 184 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 6–5: Knob and Shaft Removal 6–24 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 185 3. Remove line cord: a. Find the line cord on the rear cover. (See Figure 6–6.) Unplug Rotate Line Fuse Line Cap Pull Figure 6–6: Line Fuse and Line Cord Removal 6–25 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 186 4. Remove rear cover: Remove the four T-15 Torx 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. 6–26 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 187 Front Foot: Rotate and remove. Mounting Screw Figure 6–7: Front Cover, Rear Cover, Cabinet, EMI Gasket, and Cabinet Handle and Feet Removal 6–27 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 188 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. 6–28 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 189 Remove the covering from the back of the sticky-back labels, align them to the rear panel, and press firmly to install. e. See the procedure Line Fuse and Line Cord to reinstall the line cord, which completes the oscilloscope reassembly. 6–29 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 190 Repeat for the bottom edge of the trim ring. Lock Trim Ring Menu Button (17) Menu Elastomer Figure 6–8: Trim Ring, Menu Elastomer, and Menu Buttons Removal 6–30 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 191 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. Repeat the process just described to install the remaining three gaskets. 6–31 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 192 Handle and Feet (page 6–26) to reinstall the cabinet and rear cover Line Fuse and Line Cord (page 6–25) to reinstall the line cord, which completes the oscilloscope reassembly Spudger EMI Gaskets (4) Figure 6–9: EMI Gasket Removal and Installation 6–32 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 193 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. 6–33 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 194 Then pull the ESD shield off the left edge of the front panel to remove. (The shield snaps on and off.) 6–34 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 195 Release the five snap locks at the edge and center of the circuit board, and then pull the board away from the assembly until it unplugs from J405. See Figure 6–12. c. Lift the circuit board away from the rest of the assembly. 6–35 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 196 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.) 6–36 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 197 Front Cover, Rear Cover, Cabinet, Rear EMI Gasket, and Cabinet Handle and Feet (page 6–26) to reinstall the cabinet and rear cover Line Fuse and Line Cord (page 6–25) to reinstall the line cord, which completes the oscilloscope reassembly 6–37 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 198 Front Cover, Rear Cover, Cabinet, Rear EMI Gasket, and Cabinet Handle and Feet (page 6–26) to reinstall the cabinet and rear cover Line Fuse and Line Cord (page 6–25) to reinstall the line cord, which completes the oscilloscope reassembly 6–38 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 199 Removal and Installation Procedures A05 Attenuator Assembly Mounting Screws (4) Attenuator Shield Figure 6–13: A05 Attenuator Removal 6–39 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 200 Remove the three T-15 Torx screws securing the monitor assembly to the top of the chassis. (See Figure 6–14 to locate the screws.) 6–40 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 201 Front Cover, Rear Cover, Cabinet, Rear EMI Gasket, and Cabinet Handle and Feet (page 6–26) to reinstall the cabinet and rear cover Line Fuse and Line Cord (page 6–25) to reinstall the line cord, which completes the oscilloscope reassembly 6–41 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 202 Removal and Installation Procedures A26 Monitor Assembly EMI Clip Monitor Frame Mounting Screws (6) Figure 6–14: A26 Monitor Assembly Removal 6–42 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 203 See Figure 6–15. D1 Bus Board Support (3) A08 Jumper Board Figure 6–15: A08 Jumper Board Assembly, D1 Bus, and Board Supports Removal 6–43 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 204 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. 6–44 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 205 Line Fuse and Line Cord (page 6–25) 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 6–16: A03 CPU Removal 6–45 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 206 Front Cover, Rear Cover, Cabinet, Rear EMI Gasket, and Cabinet Handle and Feet (page 6–26) to reinstall the cabinet and rear cover Line Fuse and Line Cord (page 6–25) to reinstall the line cord, which completes the oscilloscope reassembly 6–46 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 207 Remove the single T-15 Torx screw from the bracket that secures the DSP assembly at the inside rear corner of the main chassis. 6–47 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 208 Front Cover, Rear Cover, Cabinet, Rear EMI Gasket, and Cabinet Handle and Feet (page 6–26) to reinstall the cabinet and rear cover Line Fuse and Line Cord (page 6–25) to reinstall the line cord, which completes the oscilloscope reassembly 6–48 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 209 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. 6–49 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 210 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. 6–50 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 211 Front Cover, Rear Cover, Cabinet, Rear EMI Gasket, and Cabinet Handle and Feet (page 6–26) to reinstall the cabinet and rear cover. Line Fuse and Line Cord (page 6–25) to reinstall the line cord, which completes the oscilloscope reassembly. 6–51 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 212 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 Torx screw mounting the clip to the chassis. 6–52 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 213 Front Cover, Rear Cover, Cabinet, Rear EMI Gasket, and Cabinet Handle and Feet (page 6–26) to reinstall the cabinet and rear cover Line Fuse and Line Cord (page 6–25) to reinstall the line cord, which completes the oscilloscope reassembly 6–53 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 214 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. 6–54 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 215 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. 6–55 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 216 Front Cover, Rear Cover, Cabinet, Rear EMI Gasket, and Cabinet Handle and Feet (page 6–26) to reinstall the cabinet and rear cover. Line Fuse and Line Cord (page 6–25) to reinstall the line cord, which completes the oscilloscope reassembly. 6–56 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 217 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. 6–57 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 218 See the following procedures to replace the modules removed by the access procedure: Front Cover, Rear Cover, Cabinet, Rear EMI Gasket, and Cabinet Handle and Feet (page 6–26) to reinstall the cabinet and rear cover 6–58 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 219 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 6–23: Line Filter Removal 6–59 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 220 Front Cover, Rear Cover, Cabinet, Rear EMI Gasket, and Cabinet Handle and Feet (page 6–26) to reinstall the cabinet and rear cover Line Fuse and Line Cord (page 6–25) to reinstall the line cord, which completes the oscilloscope reassembly 6–60 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 221 Then, pull up on the board to release it from the two retainers. Lift the board out of the chassis to complete the removal. 6–61 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 222 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. 6–62 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 223 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. 6–63 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 224 Front Cover, Rear Cover, Cabinet, Rear EMI Gasket, and Cabinet Handle and Feet (page 6–26) to reinstall the cabinet and rear cover Line Fuse and Line Cord (page 6–25) to reinstall the line cord, which completes the oscilloscope reassembly 6–64 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 225 A25 Low Voltage Power Supply and its Mount (page 6–54) h. A26 Monitor Assembly (page 6–40) A07 Auxiliary Power Supply (page 6–61) Line Filter (page 6–59) k. A08 Jumper Board Assembly, D1 Bus, and Board Supports (page 6–43) 6–65 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 226 Line Fuse and Line Cord (page 6–25) A08 Jumper Board Assembly, D1 Bus, and Board Supports (page 6–43) Line Filter (page 6–59) k. A07 Auxiliary Power Supply (page 6–61) 6–66 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 227 A06 Front-Panel Assembly, ESD Shield, and Menu Flex and Probe Code Flex Circuits (page 6–34) r. Front Cover, Rear Cover, Cabinet, Rear EMI Gasket, and Cabinet Handle and Feet (page 6–26) s. Line Fuse and Line Cord (page 6–25) 6–67 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 228 Removal and Installation Procedures 6–68 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 229 If a module needs to be replaced, follow the Removal and Installation Procedures located on page 6–9. If servicing a TDS 410A, follow the procedures for the TDS 420A, but ignore all references to CH 3 and CH 4.
Page 230 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 6–26: Accessing the Protection Switch 6–70 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 231 DB-25 adaptor, null modem adaptor, gender changer adaptor, and an extension cable to connect the console port to your personal computer (see Figure 6–27 on page 6–73). 2. Prerequisites: Power off the oscilloscope. 6–71 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 232 (Com1 or Com2). c. Configure port parameters: Set the telecommunication software (or terminal) parameters: Baud Rate 9600 Parity None Data Bits Stop Bits Duplex Full Protocol None 6–72 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 233 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 6–27: Console Port Connections 6–73 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 234 Note: Set all the switches of S1 back to the closed power. position and cycle power before performing another procedure. Figure 6–28: Primary Troubleshooting Procedure 6–74 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 235 Troubleshooting Pin 3 Pin 1 Pin 32 Figure 6–29: A03 CPU Board Connector P1 6–75 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 236 Replace the module. Run all Select the next module from extended diagnostics. Table 6–10. Does the display report Done. any errors? Select the next module from Table 6–10. Figure 6–30: Module Isolation Troubleshooting Procedure 6–76 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 237 Cable Cable Cable 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 6–77 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 238 Replace the A25 Low within specification (see Voltage Power Supply. Table 6–11 and Figure 6–33)? Perform the Power Supply Overload troubleshooting procedure. Figure 6–31: Low Voltage Power Supply Troubleshooting Procedure 6–78 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 239 J2 Pin Minimum Output Maximum Output +5.1 V +5.05 V +5.15 V +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 6–79 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 240 Check the current drawn from the Replace the A25 Low Voltage specification shown in power supply secondary. Power Supply. Table 6–12? Check and repair the circuit. Figure 6–32: Power Supply Overload Troubleshooting Procedure 6–80 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 241 –6.4 V 6 and 7 5.5 A –15 V 1 and 2 0.75 A Pin 1 A25 Low Voltage Power Supply Figure 6–33: A25 Low Voltage Power Supply Module (Right Side) 6–81 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 242 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 6–34: Monitor Troubleshooting Procedure 6–82 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 243 60 Hz Rate Figure 6–35: Horizontal and Vertical Sync Signals White Level J2 pin 7 (Video) Black Level Blanking Level Figure 6–36: A Video Signal with White, Black, and Blanking Levels 6–83 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 244 Troubleshooting J440 Figure 6–37: A26 Monitor Connector J440 Pin 1 Pin 1 Figure 6–38: A07 Auxiliary Power Connectors J4 and J7 6–84 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 245 Troubleshooting Pin 1 Figure 6–39: A02 Display Connector J2 6–85 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 246 The A06 Front Panel sockets and are the cables. board is ok. cables ok? Replace the A03 CPU board. Figure 6–40: Processor/Front Panel Troubleshooting Procedure 6–86 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 247 Connector Nominal Voltage J101 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 6–87 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 248 D1 Bus, and Board Supports removal still double the procedure (see page 6–43), remove the amplitude? A08 Jumper board. Replace the A04 Acquisition board or the A08 Jumper board. Figure 6–42: Attenuator/Acquisition Troubleshooting Procedure 6–88 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 249 Figure 6–43: A08 Jumper and A05 Attenuator Boards Signal Locations Table 6–14: Channel and P1 Signal Locations Trigger Vertical Vertical Inverted P1 Pin Number P1 Pin Number P1 Pin Number Channel Number 6–89 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 250 +5.1 V +5.15 V +4.9 V +6 V +6.6 V +6.0 V –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 6–90 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 251 –6.4 V –6.0 V –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 6–45: A04 Acquisition Board Power Connector 6–91 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 252 Are there 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 6–46: Backplane Troubleshooting Procedure 6–92 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 253 Nominal Voltage Minimum Voltage Maximum Voltage +15 V +14.25 V +15.75 V +5 V +5.05 V +5.15 V –5 V –5.05 V –5.2 V –15 V –14.85 V –15.15 V 6–93 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 254 Troubleshooting Pin 1 Pin 1 Pin 1 Pin 1 Pin 1 Figure 6–47: A01 Backplane Module 6–94 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 255 Power on the oscilloscope. The A01 Backplane was Repeat the procedure or contact your local bad. Tektronix service center. Figure 6–48: I2C Isolation Troubleshooting Procedure 6–95 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 256 A03 CPU, the the A02 Display, and the A09 DSP, the A02 Display, and the A01 Backplane modules. A01 Backplane modules. Figure 6–49: Console Troubleshooting Procedure 6–96 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 258 Options and Accessories This chapter describes the various options as well as the standard and optional accessories that are available for the TDS 410A, TDS 420A, and TDS 460A Digitizing Oscilloscopes. Options The following options are available: Option 02: Front Cover With this option, Tektronix ships a front cover and pouch with the instrument.
Page 259 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 260 Options and Accessories Option 96: Certificate of Tektronix ships a Certificate of Calibration which states this instrument meets or Calibration exceeds all warranted specifications and was calibrated using standards and instruments whose accuracies are traceable to the National Institute of Standards and Technology, an accepted value of a natural physical constant, or a ratio calibration technique.
Page 261 You can also order the optional accessories listed in Table 7–4: Table 7–4: Optional Accessories Accessory Part Number High Voltage Differential Probe P5200 TDS 410A, TDS 420A, & TDS 460A Service Manual 070-9217-XX Plotter (GPIB and Centronics Standard) HC100 Plotter (Centronics Standard) HC200...
Page 262 Connector, BNC: BNC to Probe Tip Adapter 013-0226-00 Connector, BNC: 50 , BNC to Probe Tip Adapter 013-0227-00 Connector, Probe: Package of 100, compact 131-4244-00 Connector, Probe: Package of 25, compact 131-5031-00 7–5 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 263 NOTE. The next four items can only be used with the Compact-to-Miniature Probe Tip Adapter. Dual-Lead Adapter 015-0325-00 BNC-to-Probe Tip Adapter 013-0084-01 G.R.-to-Probe Tip Adapter, 50 017-0088-00 Bayonet Ground Assembly 013-0085-00 7–6 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 264 Service Assurance Tektronix offers the following services that you can purchase any time during the warranty period of this product: REP (Repair) Service Assurance provides one year of post-warranty repair support.
Page 265 Options and Accessories 7–8 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 267 The modules that make up this instrument are often a combination of mechanical and electrical subparts. Therefore, all replaceable modules are listed in Sec- tion 10, Mechanical Parts List. Refer to that section for part numbers when using this manual. 8–1 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 268 Electrical Parts List 8–2 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 270 Diagrams This section contains the block diagram and the interconnection diagram for this oscilloscope. If servicing a TDS 410A, ignore all references to CH 3 and CH 4. Symbols Graphic symbols and class designation letters are based on ANSI Standard Y32.2–1975.
Page 271 10 PINS LINE FILTER 2 PINS * NO BLOCK DIAGRAMS FOR THESE BOARDS. 2 PINS # THESE REPLACEABLE CABLES ARE LISTED IN SECTION 10. AUXILIARY POWER Figure 9–1: TDS 400A Interconnections 9–2 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 272 P1 & P2 A10 SERPAR 50 PINS 98 PINS 98 PINS 8 PINS DISPLAY 22 PINS 10 PINS J901 A01 BACKPLANE 10 PINS A26 MONITOR Figure 9–1: TDS 400A Interconnections (Cont.) 9–3 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 273 A17 BEZEL BUTTON FRONT PANEL POTS BATTERY PROBE ADJ PROBE COMPENSATION FRONT PANEL LINE FILTER FL52 POWER LOW VOLTAGE POWER SUPPLY SWITCH POWER BACKPLANE FUSE Figure 9–2: TDS 400A Block Diagram 9–4 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 274 SYSTEM GPIB IEEE 488 PORT MONITOR ASSEMBLY VIDEO DISPLAY VIDEO MONITOR 7V, 2A FUSED OPTION 13 RS-232 DTE PORT CENTRONICS A10 SERPAR COMPATIBLE Figure 9–2: TDS 400A Block Diagram (Cont.) 9–5 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 275 Diagrams 9–6 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 277 670-7918-03 670-7918-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 278 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 279 EXIT 53 RT 80 DELAWARE WATER GAP PA 18327 BOX A 34416 PARSONS MFG CORP 1055 OBRIAN DR MENLO PARK CA 94025–1408 50463 POWER SYSTEMS INC. 45 GRIFIN ROAD SOUTH LINFIELD, CT 06002 10–3 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 280 BOHEMIA LONG ISLAND NY 11716–2501 PO BOX 511 70903 COOPER BELDEN ELECTRONICS WIRE AND CABLE SUB OF COOPER INDUSTRIES INC 80009 TEKTRONIX INC 14150 SW KARL BRAUN DR BEAVERTON OR 97077–0001 PO BOX 500 10–4 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 281 80009 3540736XX (TDS410A ONLY) –25 366–2164–XX PUSH BUTTON:SMOKE TAN 80009 3662164XX –26 334–8820–XX MARKER,IDENT:BEZEL 80009 3348820XX (TDS460A ONLY) 334–8821–XX MARKER,IDENT:BEZEL 80009 3348821XX (TDS420A ONLY) 334–8822–XX MARKER,IDENT:BEZEL 80009 3348822XX (TDS410A ONLY) 10–5 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 282 –28 200–4219–XX COVER:DISK DRIVE,3.5 INCH 80009 2004219XX –29 131–5421–XX CONTACT,ELEC:ESD PROTECTION,0.005 ST STL 80009 1315421XX –30 260–2539–XX SWITCH SET:BEZEL TK1918 2602539XX –31 259–0086–XX FLEX CIRCUIT:BEZEL BUTTON 07416 ORDER BY DESC 10–6 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 283 Figure 10–1: External and Front Panel Modules 10–7 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 284 80009 6713086XX (TDS410A ONLY) –25 337–3713–XX SHIELD,ELEC:ATTENUATOR TK1935 3373713XX –26 671–1676–XX CIRCUIT BD ASSY:BACKPLANE 80009 6711676XX –27 200–3660–XX COVER,AUTO CAL:POLYCARBONATE TK1163 ORDER BY DESC –28 441–1982–XX CHASSIS ASSY:ALUMINUM 80009 4411982XX 10–8 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 285 Figure 10–2: Internal Modules 10–9 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 286 ORDER BY DESC –11 174–2280–XX CA ASSY,SP,ELEC:FLAT FLEX,1.7L TK2469 174–2280–XX –12 174–2278–XX CA ASSY,SP,ELEC:FLAT FLEX,2.5L TK2469 174–2278–XX –13 174–3135–XX CABLE ASSY,SP:FLAT,FLX,26,1MM,15.0L 80009 1743135XX (DISK DRIVE) –14 174–2284–XX CA ASSY,SP,ELEC:FLAT FLEX,8.8L 80009 1742284XX 10–10 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 287 Figure 10–3: Cables and Routing 10–11 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 288 CABLE ASSY,PWR,:3,18 AWG,98 L,SVT,GREY/BLK 70903 ORDER BY DESC (OPTION A4–NORTH AMERICAN) 161–0167–00 CABLE ASSY,PWR,:3.0 X 0.75,6A,240V,2.5M L S3109 ORDER BY DESC (OPTION A5–SWITZERLAND) –––––––– CLAMP,PWR CORD:POLYMIDE TK1163 ORDER BY DESC (SEE FIGURE 10–1–9) 10–12 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 289 COVER,FRONT:ASB (SEE FIGURE 10–1–22) 070–8521–XX MANUAL,TECH:RACKMOUNT 80009 0708521XX 070–8567–XX MANUAL,TECH:RS–232/CENTRONICS 80009 0708567XX (OPTION 13 ONLY) 070–8722–XX MANUAL,TECH:INSTRUCTION 80009 0708722XX (OPTION 3P ONLY) 070–8762–XX MANUAL,TECH:USER,VIDEO DISPLAY 80009 0708762XX (OPTION 05 ONLY) 10–13 TDS 410A, TDS 420A & TDS 460A Service Manual...
Page 290 10–14 TDS 410A, TDS 420A & TDS 460A Service Manual...

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