Tektronix 1740A series User Manual
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Tektronix 1740A series User Manual

Waveform/vector monitor
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Tektronix 1740A series User Manual

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  • Page 1 Artisan Technology Group is your source for quality new and certified-used/pre-owned equipment SERVICE CENTER REPAIRS WE BUY USED EQUIPMENT • FAST SHIPPING AND DELIVERY Experienced engineers and technicians on staff Sell your excess, underutilized, and idle used equipment at our full-service, in-house repair center We also offer credit for buy-backs and trade-ins •...

  • Page 2: Service Manual

    Service Manual 1740A/1750A/1760–Series Waveform/Vector Monitor 070-8469-00 Warning The servicing instructions are for use by qualified personnel only. To avoid personal injury, do not perform any servicing unless you are qualified to do so. Refer to the Safety Summary prior to performing service.
  • Page 3 Copyright Tektronix, Inc., 1993. All rights reserved. Printed in U.S.A. Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supersedes that in all previously published material. Specifications and price change privileges reserved. The following are registered trademarks: TEKTRONIX and TEK.
  • Page 4 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. Customer shall be re- sponsible for paying all shipping charges, duties, taxes, and any other charges for products returned to any other locations.
  • Page 5 The three members of the 1740A Series Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 6 German Postal Information Bescheinigung des Herstellers/Importeurs Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 7: Standards Compliance

    Standards Compliance The 1740A/1750A/1760–Series Waveform Vector Monitors comply with the following safety standards: Underwriters Laboratories: UL1244 — Second Edition—Standard for Electrical and Electronic Measuring and Testing Equipment Canadian Standards Association: C22.2 No. 231 Series–M89—CSA Safety Re- quirements for Electrical and Electronic Measuring and Testing Equipment American National Standard: ANSI/ISA–S82–1988—Safety Standard for Electri- cal and Electronic Test, Measuring, Controlling and Related Equipment International Standard: IEC 348—Second Edition—Safety Requirements for Elec-...

  • Page 8: Specifications

    Contents Specifications Specification ..........1–1 Characteristics Tables .

  • Page 9: Table Of Contents

    6–13 Tektronix Service Offerings .........
  • Page 10 Contents Bezel Removal ..........6–19 Graticule Light Removal and Replacement .
  • Page 11 Contents 1740A/1750A/1760 – Series Service Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 12: List Of Figures

    Contents List of Figures Figure 2–1: Dimensions of the 1700F00 plain cabinet ....2–2 Figure 2–2: 1700F02 portable cabinet ......2–3 Figure 2–3: Rear view showing the securing screws .

  • Page 13: Figure 2-6: 1700F05 Rack Mounting With A 1700F07 Utility Drawer

    Contents Figure 5–6: Typical Adjustment Procedures PC screen display ..5–11 Figure 5–7: A1 Power Supply Board......5–13 Figure 5–8: A3 Main Board.

  • Page 14: List Of Tables

    Contents List of Tables Table 1–1: Waveform Vertical Deflection ......1–3 Table 1–2: External Reference ....... . 1–5 Table 1–3: Waveform Horizontal Deflection .
  • Page 15 Contents Table 6–9: Etched Circuit Board Assemblies ..... . 6–17 Table 6–10: Main Board Plug Connections ..... . . 6–27 Table 7–1: Power Plugs Available for These Instruments .

  • Page 16: Safety Summary

    Safety Summary This summary contains general safety information for operating and servicing personnel. Specific warnings and cautions are given throughout the manual where they apply, but may not appear in this summary. Terms In this manual CAUTION statements identify conditions or practices that can damage the equipment or other property.
  • Page 17 Safety Summary Ground the product This product is grounded through the grounding conductor of the power module power cord. To avoid electrical shock, plug the power cord into a properly wired receptacle before connecting to the product input or output terminals. A protec- tive ground connection by way of the grounding conductor in the power cord is essential for safe operation.
  • Page 18 Preface This manual provides servicing information for the 1740A/1750A/1760–Series of instruments. Material found in this volume is targeted at the service techni- cian; operating information, tailored to the specific family member, can be found in that instrument’s “User” manual. To date there are three manuals available for this family of instruments. This Service Manual applies to all instruments in the family.

  • Page 19: Specification

    Preface The specifications contained in the Specification section of this manual should be used by the servicing technician. Its tables contain Performance Verification step numbers to make it possible to document the test methods used to verify the accuracy of the instrument. The User manual contains some servicing instructions for quick, non dangerous operations;...
  • Page 20 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 21 Specification The 1740A/1750A/1760–Series is a half-rack width by three-rack-unit high instrument. It is a versatile waveform monitor/vectorscope for composite and component television signals. Most circuitry and the mechanical components are shared throughout the series. In addition to NTSC and PAL standard versions, a dual standard (NTSC/PAL) version is available.

  • Page 22: Characteristics Tables

    Specification The 1760–Series combines component measurements with the composite capabilities of the 1740A/1750A–Series. It incorporates all of the measurements of the 1740A–Series with a full set of component analog measurements. The assignable cursors, along with the CRT readout can be used for time, voltage, and phase measurements.

  • Page 23: Table 1-1: Waveform Vertical Deflection

    Specification Table 1–1: Waveform Vertical Deflection (PAL Values in Parentheses) CATEGORY DESCRIPTION Deflection Factor 1 V full scale (X1): 1 volt input displayed within 1% of 140 IRE (1.00 V) X5 Gain: 0.2 volt input displayed within 1% of 140 IRE (1.00 V) X10 Gain: 0.1 volt input displayed within 1% of 140 IRE (1.00 V) Any one of the 8 inputs...
  • Page 24 Specification Table 1–1: Waveform Vertical Deflection (Cont.) (PAL Values in Parentheses) CATEGORY DESCRIPTION Luminance Filter Chrominance Rejection 34 dB (1745A–1755A–1765 only) Chrominance Filter Gain Ref. is flat at F (3.58 or 4.43 MHz) Performance Verification Procedure Step Chrominance Filter Bandwidth 1.5 MHz 0.3 MHz Centered at F...

  • Page 25: Table 1-2: External Reference

    Specification Table 1–1: Waveform Vertical Deflection (Cont.) (PAL Values in Parentheses) CATEGORY DESCRIPTION DC Restorer Offset Error 1 IRE (7 mV ) Typically 3 mV Performance Verification Procedure Step Fast Settling Time 6 video lines Blanking Shift with 10 to 90% APL Change 1 IRE (7 mV ) Performance Verification Procedure Step Blanking Shift with Presence and Absence of Burst...

  • Page 26: Table 1-3: Waveform Horizontal Deflection

    Specification Table 1–3: Waveform Horizontal Deflection CATEGORY DESCRIPTION Sweep Synchronization: Sweep triggered by horizontal and vertical sync pulses Sweep Length: 12 divisions Sweep freeruns without input Performance Verification Procedure Step Sweep Timing Accuracy 1 Line: 5 s/division 2 Line: 10 s/division 1 Field: displays one full field, including field rate sync 2 Field: displays two full fields and the field rate sync between them Performance Verification Procedure Step...

  • Page 27: Table 1-4: Measurement Cursors

    Specification Table 1–4: Measurement Cursors CATEGORY DESCRIPTION Waveform Accuracy Voltage: 0.5% Timing: 0.5%, for line rate sweeps Typically 0.5% for field rate sweeps Performance Verification Procedure Step : 9 & Vector Accuracy Gain: 1.5% Phase: Measured with respect to the Color Bar signal Performance Verification Procedure Step Table 1–5: RGB/YRGB CATEGORY...

  • Page 28: Table 1-7: Vector Mode

    Specification Table 1–7: Vector Mode CATEGORY DESCRIPTION Input Requirements 6 dB p–p Instrument freeruns with no input External Reference: Black burst or composite video Nominal Subcarrier Frequency (F NTSC 3.579545 MHz 4.43361875 MHz Chrominance Processing Bandwidth (–3 dB) 1 MHz 200 kHz Performance Verification Procedure Step : 15...

  • Page 29: Table 1-8: Audio Mode

    Specification Table 1–7: Vector Mode (Cont.) CATEGORY DESCRIPTION Phase Control Quantization Position Control Range 0.236 inch (6 mm) from center Performance Verification Procedure Step Differential Phase Performance Verification Procedure Step Differential Gain Performance Verification Procedure Step Table 1–8: Audio Mode CATEGORY DESCRIPTION Input...

  • Page 30: Table 1-9: Time Code

    Specification Table 1–9: Time Code CATEGORY DESCRIPTION Input Longitudinal Time Code. DC coupled, differential input 20 k . Input Impedance Input Amplitude 0, 4, 8, & 12 dBm full scale. Menu selectable for 140 IRE (1.0 V) deflection Maximum Input Voltage –10 V to +10 V peak Bandwidth (–3 dB) 200.0 kHz...

  • Page 31: Table 1-11: Component Vector Mode (1760-Series Only)

    Specification Table 1–11: Component Vector Mode (1760–Series only) CATEGORY DESCRIPTION Vertical Bandwidth –3 dB at 1.0 MHz Horizontal to Vertical Bandwidth Matching No eye opening at 500 kHz or 2 MHz Vertical Gain Accuracy 2.5%. With respect to graticule Performance Verification Procedure Step Horizontal Gain Accuracy 2.5% With respect to graticule...

  • Page 32: Table 1-14: Transcoded Gbr Outputs

    Specification Table 1–14: Transcoded GBR Outputs CATEGORY DESCRIPTION GBR, SMPTE, MII, or Betacam format. Selectable from a menu Input Format Accuracy Typically <1% No line select strobe on GBR outputs Performance Verification Procedure Step GBR Output Impedance Nominally 75 . Back porch clamped to 0V Table 1–15: CRT Display (PAL Values in Parentheses) CATEGORY...

  • Page 33: Table 1-16: Power Source

    Specification Table 1–16: Power Source CATEGORY DESCRIPTION Mains Voltage Range 90 –250 V Continuous range from 90 to 250 V ac Performance Verification Procedure Step Mains Frequency 50 or 60 Hz. Power Consumption 110 VA (67 watts) maximum; 102 VA (60 watts) typical Table 1–17: Environmental Characteristics CATEGORY DESCRIPTION...

  • Page 34: Table 1-19: Physical Characteristics

    FCC EMI Compatibility (FCC Rules Part 15, Sub-part J, Class A) VDE 0871.5 (Class B) Instrument must be installed in a cabinet equal to the shielding provide by Tektronix 1700F00, 1700F02, or 1700F05 cabinets to qualify for EMI certification. Table 1–19: Physical Characteristics...
  • Page 35 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 36: Installation

    Installation The information contained here deals with the installation and operation of the 1740A/1750A/1760–Series instrument. If the instrument is to be removed from its installed position for servicing, this will provide the information needed to remove it or reinstall it. Note that the repackaging information is located at the end of the Maintenance section.

  • Page 37: Figure 2-1: Dimensions Of The 1700F00 Plain Cabinet

    The 1700F02 Portable carrying case is an enhanced version of this cabinet, as is the 1700F04 side-by-side rack mount assembly. All of these cabinets are available from Tektronix. If you need one of these cabinets, contact your nearest Tektronix field office or representative for assistance in ordering.

  • Page 38: Figure 2-2: 1700F02 Portable Cabinet

    The mounting hole sizes and spacing are different from those of the 1700F00. All of the 1700–Series metal cabinets, which are available from Tektronix as Optional Accessories, provide the proper electrical environment for the instrument.

  • Page 39: Figure 2-3: Rear View Showing The Securing Screws

    The optional 1700F05 side-by-side rack adapter, shown in Figure 2–4, consists of two attached cabinets. It can be used to mount the 1740A/1750A/1760–Series and another half-rack width instrument, such as a spectrum monitor (Tektronix 1705A), in a standard 19-inch rack.

  • Page 40: Figure 2-4: The 1700F05 Side-By-Side Rack Adapter

    Installation 18.970 CONTROLS FRONT PANEL TO RACK ALIGNMENT. 6.875 5.250 Mounting 17.270 Holes REAR VIEW Figure 2–4: The 1700F05 side-by-side rack adapter The rack adapter is adjustable, so the instrument can be more closely aligned with other equipment in the rack. See Figure 2–4. 1700F05 1700F06 Figure 2–5: A1700F05 with a blank front panel (1700F06)
  • Page 41 If only one side of the rack adapter is used, a 1700F06 Blank Panel can be inserted in the unused section. See Figure 2–5. The rack adapter and panel are available through your local Tektronix field office or representative. When only one instrument is mounted in the side-by-side adapter, an accessory drawer (1700F07) can be installed in the blank side of the cabinet.

  • Page 42: Figure 2-7: Custom Installation Of An Instrument

    Installation For Flush Front Panel: Cut hole the same size as the monitor front molding to allow the monitor front panel to align with the custom panel surface. Requires four 0.156” holes below the 1700F00 cabinet to secure the instrument to the shelf. For Protruding Front Molding: Cut hole in panel the same size as the opening in the monitor cabinet to al-...

  • Page 43: Table 2-1: Power Cord Options

    Installation Mains Frequency and The 1740A/1750A/1760–Series monitors operate at 50 and 60 Hz, over the range Voltage Range of 90–250 Volts, without operator adjustment. Power Cord Options The 1740A/1750A/1760–Series of instruments are delivered from the factory with a 60 Hz/117 V power cord, unless one of the power cord options was ordered.

  • Page 44: Figure 2-8: Rear Panel Connectors

    Installation                          Figure 2–8: Rear panel connectors Loop-Through Video There are a total of eight 75 compensated loop-through video input bnc Inputs connectors.

  • Page 45: Figure 2-9: Rear Panel Remote Connector

    Installation Picture Monitor Out (PIX The PIX OUT is a 75 , non-filtered output designed to drive a picture monitor. OUT) A bright-up strobe is added when the instrument is operated in the line select mode. Strobe will either be the line in the selected field, the line in all fields or of 15 lines duration in the selected field or all fields.
  • Page 46 Installation Table 2–2: Remote Connector (Cont.) 1740A/1750A/1760 – Series Service Manual 2–11 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 47: Figure 2-10: Replacement Adapter For 1740/1750

    Installation Table 2–2: Remote Connector (Cont.) Remote Connector Converter If the 1740A/1750A/1760–Series is used as a direct replacement for a 1740–Se- ries or 1750–Series instrument, an adapter or rewired remote cable will be required. Figure 2–10 is a diagram of how the adapter or cable will need to be wired.

  • Page 48: Figure 2-11: Rear Panel Rs232 Connector

    Software Disk The software disk is a 3.5” (1.44MB) high-density disk. It contains all programs necessary to upgrade or reload the operating software in the Tektronix 1740A/1750A/1760–Series instruments to software version 2.2 or greater. If a disk drive other than 3.5” is to be used, have the contents of the disk copied to the desired size disk or to a hard disk directory.
  • Page 49 Installation Performs software upgrade. UPGRADE.EXE Restores calibration constants and user presets. NVRESTOR.EXE Used to calibrate new features. NEW_CAL.EXE Data file used by SOFTWARE.BIN UPGRADE.EXE. Equipment Required to IBM Compatible PC with the following: Perform Software DOS 3.3 or Higher. Upgrades 640 K Bytes Random-Access Memory (RAM).

  • Page 50: Figure 2-12: Hookup For 9-Pin Pc Connector

    Installation CAUTION. The instrument cannot be used during execution of any of the programs on this disk. If the operation of any of these programs is interrupted, that program must be rerun from the beginning to ensure a proper upgrade. Procedure for Loading Software PC Hookup Hook up the 1740A/1750A/1760–Series rear-panel RS232 connector to the COM 1, 2, 3, or 4 connector on the PC, as shown in Figure 2–12, Figure...

  • Page 51: Figure 2-14: Rs232 Cable Standard And Alternate Hookups For 25-Pin Pc Connector

    Installation 25-Pin Female Connector 9-Pin Male Connector 25-Pin Female 9-Pin Male Connector Connector Figure 2–14: RS232 cable standard and alternate hookups for 25-Pin PC Connector 1. Run NVSAVE (Execution time <1 minute) a. Turn on the 1740A/1750A/1760–Series instrument. 1740A/1750A/1760 – Series Service Manual 2–16 Artisan Technology Group - Quality Instrumentation ...
  • Page 52 Installation NOTE. PC Floppy Drive or Hard Disk On PCs the drive letter for the floppy, or hard disk drive may be A, B, etc. Enter the appropriate letter for your floppy drive in the following steps. If the disk contents were copied to a hard disk directory, run the programs from that directory.
  • Page 53 Installation A8 XROM PAD 1 Figure 2–15: Location of XROM circuit board with PAD 1 shown d. Set switch 4 of SW1 to the open position. (SW1 is the red switch on the Main board, near the front of the instrument.) e.

  • Page 54: Calibration Of New Features

    Installation a. Be sure that was executed (step 1). NVSAVE prompt, type “B:” and b. At the ENTER. c. Type . When asked for the port, respond “UPGRADE” ENTER with the number of the connector you are using. d. Wait for the message that the program execution is completed. e.
  • Page 55 Installation 2. Calibrate the new features. a. Perform steps A through I for all instruments. b. Perform steps J and K for 1760–Series. c. Type X to exit the program. Special Recovery Procedure for Power Loss During the Execution of UPGRADE If there is a power failure to either the instrument or the PC during the loading of the software, the following recovery procedure is necessary.

  • Page 56: Operating Instructions

    1 and automatically displays the results in a “parade” format. In other words, when “A123” is selected, the A1 minus A2 waveform is shown to the left of the A1 minus A3 waveform. This lets you use the Tektronix-developed Bowtie test signal to check and adjust inter-channel timing on component systems.

  • Page 57: Figure 2-16: 1760 Front Panel

    Operating Instructions The middle three knobs under the display are called Bezel controls. Turn these knobs to adjust the parameters—or scroll through the lists—that appear above them on the display screen. Operating Instructions 1. Connect the instrument to the desired signal path(s). Remember to connect component signals to A1–2–3 or B1–2–3.

  • Page 58: Figure 2-17: The Crt Menu, With The Bezel Controls And Buttons

    Operating Instructions 4. Use the DISPLAY and INPUT buttons to view some aspect of the desired signal. 5. Select the CRT menu to adjust the waveform, readout, and scale brightness, and the waveform focus. Press the CLEAR MENU button to remove the menu from the display.

  • Page 59: Functional Overview

    Operating Instructions Figure 2–17 shows the bezel controls and buttons. The center three controls under the CRT are referred to as Left, Center, and Right bezel controls. Control functions vary with menu choice; a readout just above each active knob shows its present function. The knobs are used as variable analog controls to set values such as phase, amplitude, and intensity.

  • Page 60: Table 2-3: The Available Display Modes

    Operating Instructions Table 2–3: The available display modes Mode Composite Component VECTOR 1760–Series only 1750A–Series and 1760– Series, Option SC only WAVEFORM AUDIO Yes (via REMOTE input) Yes (via REMOTE input) LIGHTNING and Diamond 1760–Series only BOWTIE 1760–Series only PICTURE TIME CODE MULTIPLE Displays Vector...
  • Page 61 Operating Instructions Audio Audio amplitude and phase is monitored using a calibrated X/Y Lissajous display. The operator can verify that the program audio will be properly reproduced on both monaural and stereo receivers. Correct phasing between two audio channels is quickly verified by the direction of the display. Lightning and Diamond The front-panel LIGHTNING button is used for both the Lightning and the (1760–Series only)

  • Page 62: Displaying A Signal

    Operating Instructions When exiting MULTIPLE, the instrument will return to the previous (non-MUL- TIPLE) display settings. When entering MULTIPLE again, the previous MULTIPLE display settings will be restored. Displaying a Signal The paragraphs below describe how to use the various front-panel buttons to display exactly the signal or signals you want.
  • Page 63 Operating Instructions Sweep Sweep buttons are used to select the waveform sweep rate. LINE/FIELD toggles through four sweep rate selections: one line, two line, one field, and two field. In PARADE mode, the LINE/FIELD button becomes a two-way switch, toggling between line and field.
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  • Page 65: Block Diagram Description

    Block Diagram Description The 1740A–Series of Waveform/Vector Monitors has the typical composite displays used to monitor video quality. The 1750A–Series adds SCH phase measurements. The 1760–Series provides both composite and component analog capabilities. Option SC added to the 1760–Series provides SCH phase measurements.
  • Page 66 Block Diagram Description Horizontal Reference In addition to driving the Input Multiplexer the video signal also drives the Multiplexer and Reference Horizontal Reference Multiplexer to select the internal sync and subcarrier references for the Line Rate Controller, chroma for the vectorscope, and SCH Switch Phase.
  • Page 67 Block Diagram Description An offset voltage from the DACs vertically positions the display. When CRT readout is being processed the gain of the amplifier is changed by the Line Rate Controller. The differential output of the Vertical Amplifier drives the vertical output amplifier to normalize signal amplitude and drive the CRT deflection plates.

  • Page 68: Block Diagram 2 Vector – Sch – Component

    Block Diagram Description Block Diagram 2 Vector – SCH – Component The vector circuits on this page are common to all monitors of this family. The SCH circuitry, in the upper left corner, is used by the 1750A–Series and the 1760–Series Option SC.
  • Page 69 Block Diagram Description The resultant output for internal reference is a propeller (2 SCH dots 180 apart) display. When color framing of two signals is needed an external reference signal is required. The display logic is developed by comparing the incoming reference video SCH and sync and then comparing the result to the subcarrier generated by the 4 x Oscillator.

  • Page 70: Block Diagram 3 Microprocessor And Line Rate Controller

    Block Diagram Description Block Diagram 3 Microprocessor and Line Rate Controller The heart of these instruments is a microprocessor. It controls all aspects of the instruments operation. Where synchronous control signals are required a Line Rate Controller is employed. Microprocessor The 16-bit microprocessor has its program code stored in a Flash Erasable Programmable Read-Only Memory (EPROM).
  • Page 71 Block Diagram Description Serial Static Outputs This is a serial in/parallel out register for signals that do not need to be synchro- nized to the video signal. Serial Interface The Serial Interface is a latch, driven by the Microprocessor, that outputs the chip select and enables for the serial devices, such as the DACs and the serial/parallel registers used for the Remote and Front Panel.
  • Page 72 Block Diagram Description 1740A/1750A/1760 – Series Service Manual 3–8 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 73: Circuit Theory

    Circuit Theory The following discusses the circuit theory of these instruments down to the component level. It is arranged on a diagram-by-diagram basis for the schematic diagrams located in the Diagrams and Circuit Board Illustrations, located near the back of the volume. &...
  • Page 74 Circuit Theory Diagram Vertical Input Input MUX The Input MUX is an 8-to-1 multiplexer (U79) controlled by the Line Rate Controller on Diagram 7. It selects one or a combination of the input signals to drive the Pix Out, the Filters, the Internal Video Sync Separator (Diagram 7), and the flat input of the Filter Multiplexer (Diagram 4).
  • Page 75 Circuit Theory The chroma filtered video appropriate for the input color standard (PAL or NTSC) is selected by the Microprocessor through a Serial Converter on Diagram 9. Either the PAL NTSC (for NTSC) or the NTSC PAL (for PAL) control signal is asserted to close U76A or U76D to route the filtered video to the Vertical Amplifier (Diagram 4) and subsequently to the vectorscope demodulators.
  • Page 76 Circuit Theory Vertical Amplifier The Vertical Amplifier, U55, contains two independent amplifiers. The external gain controlled Auxiliary amplifier is used as differential output chrominance amplifier. The output of the Chroma Filter Amplifier (Diagram 3) is input to the + input of the Aux amplifier. Its gain is controlled by the CHROM GAIN level from a DAC shown on Diagram 9.
  • Page 77 Circuit Theory Horizontal Signal MUX The Horizontal Signal input selection consists of dual-in-line package (DIP) switch segments (U59, U63, U70, and U94) and an 3-to-8 line decoder (U50). The decoder is controlled by 3 synchronous outputs from the Line Rate Controller (Diagram 7).
  • Page 78 Circuit Theory Diagram Microprocessor The Microprocessor controls the functions of the 1740A/1750A/1760–Series. It has a 32-bit internal architecture and operates with a 16-bit data bus and a 24-bit address bus. Microprocessor U18 is the Microprocessor. It is crystal controlled, with Y1 as the active element of the clock oscillator.
  • Page 79 Circuit Theory Flash EPROM output is written into the Random Access Memory (RAM), U11 & U17, when SRAM and WR LO and WR HI are pulled low. The Microproces- sor reads the RAM when SRAM and RD LO and RD HI are pulled low. Decoders The Address Decoder is U21.
  • Page 80 Circuit Theory Synchronous Outputs Output signals from the Microprocessor are timed out to analog switches and DACs by the Line Rate Controller clocks synchronous latches. Each latch is clocked by its own individual output from the Line Rate Controller. Diagram Readout The Readout Control state machine interprets the readout instructions from the Microprocessor and loads digital data into the DAC.

  • Page 81: Diagram 10 Remote & 1760–Series / Xrom Bus Connectors

    Circuit Theory U77 and U82 are 8-bit serial in/parallel out shift registers. Their outputs are asynchronous switching control lines. Q24 is a driver for the 8 input coupling AC/DC switches. D/A Converters U32 and U38 are 8-bit serial in/parallel out shift registers that generate DAC load and chip enable signals.
  • Page 82 Circuit Theory Diagram Z-Axis & Control Bezel Controls The bezel controls are the five, two-section, potentiometers located below the CRT. The outside two are dedicated controls for vertical and horizontal positioning. The center three potentiometers are assigned by menu selection. U3 and U4 are 8-bit switched capacitor successive approximation A-to-D converters with serial output.

  • Page 83: Diagram 13 Dacs & Digital Control

    Circuit Theory Diagram Front Panel Switching There are 28 momentary contact switches arranged in a matrix. When U7, a serial in/parallel out shift register, is loaded, shifted, and read, PB8 – PB10 are pulled low along with the CS (chip select and SH/LD (shift/load) for U6 and U8. When one or more of the push-button switches is closed a low state is loaded into one of the U6 parallel inputs.
  • Page 84 Circuit Theory SCH Board ID When an SCH board is installed, the SCH ID0–SCH ID3 inputs to U27 are held low for recognition by the Microprocessor (when it requests ID over the buffered serial bus). Diagram Subcarrier Regenerator 45 Phase Flipper When PAL subcarrier is input to the Loop Phase Detector a 90 phase shift is required on alternate lines.
  • Page 85 Circuit Theory Lock Detector The Lock Detector is similar to the Loop Phase Detector, except that the + Carrier input signal is phase shifted by 90 . This results in the output of the Lock Detector being maximum when the output of the Loop Phase Detect or is zero.
  • Page 86 Circuit Theory Diagram Phase Shifter VCXO The VCXO is a crystal-controlled, ECL oscillator consisting of U29A and B. Center frequency is established by Y1 for PAL and Y2 for NTSC. The center frequency for the crystal oscillator is fine tuned by Netting Capacitor adjust- ments C106 and C109.
  • Page 87 Circuit Theory Diagram Demodulator Incoming chrominance is band-pass filtered, clamped at sync tip time, and compared to the phase-shifted, regenerated subcarrier signal for demodulation. Subcarrier signal is quadrature shifted (90 ) before input to the R–Y (V) demodulator. In addition, for PAL applications, and any time the front-panel selected Test Circle is enabled, a V–Axis switcher shifts the subcarrier input by 180 for alternate lines.
  • Page 88 Circuit Theory Demodulator Output A four-pole, active, low-pass filter (Q2 and Q3 for the R–Y (V) and Q1 and Q4 Filters and Amplifiers for the B–Y (U)) removes the high-frequency components of the demodulation process. These filters determine the bandwidth of the vector mode signal path to control the rise time and delay of the demodulated signal.
  • Page 89 Circuit Theory Sync Delay The transitions from the 50% point detector are one input to a one shot, U12A. The other input is the sync gate from the Line Rate Controller. When the 50% transition occurs during sync time (active video line), U12A switches and generates a pulse whose duration is dependent on the current through Q15.

  • Page 90: Diagram 18 Reference Sch

    Circuit Theory The oscillator output is divided by 4 with a Johnson counter internal to U9. The counter’s four outputs are 90 apart. The four output signals drive a 4:1 multiplexer also internal to U9. The multiplexer is controlled by the NTSC and PAL pulses from U24 (Diagram 18) and pulses and levels from the Line Rate Controller (Diagram 7).
  • Page 91 Circuit Theory Q3, in the operational amplifier, saturates when the amplifier output drops below 0 V. This saturation condition, coupled with the clamp feedback, is used to strip off large amplitude video what would otherwise break down the comparator. SCH Sync Locked U18 and U15 form an F oscillator that is series tuned by a selected crystal, Y3 Oscillator...

  • Page 92: Figure 3-1: Ntsc Line Count (U24) & Color Frame 1 Sch Field Pulse

    Circuit Theory LINE 18 LINE 19 LINE 20 LINE 21 LINE 22 LINE 23 LINE 24 NTSC NTSC NTSC NTSC NTSC NTSC NTSC FIELD 1 FIELD 2 FIELD 3 FIELD 4 SCH FIELD PULSE FROM U9 OCCURS IN FIELD 1 ONLY Figure 3–1: NTSC line count (U24) &...

  • Page 93: Diagram 19 Component Inputs, Transcoders, & Rgb Outputs

    Circuit Theory Diagram Component Inputs, Transcoders, & RGB Outputs This schematic diagram is used only with 1760–Series instruments. Input Selection Video from the A1 – A3 and B1 – B3 input amplifiers is routed to emitter followers Q2 and Q3 for channel 1 (A1 or B1), Q12 and Q13 for channel 2, and Q22 and Q23 for channel 3.

  • Page 94: Diagram 20 Component Control And Switching

    Circuit Theory When Beta format is selected, the four DIP switches, U40C, U40D, U51C, and U52C are open and the gain of the amplifiers is changed to reduce the P and P components of the RGB signal by approximately 30%. When the SMPTE format is selected the switches are closed and the P components are at full amplitude.

  • Page 95: Table 3-2: Component Display Output Switching

    Circuit Theory When the lightning display is selected, the sync dot, at center screen, needs to be unblanked. In order to display the sync dot the Clear input for U502B goes low to clear it. Output Switching Signal selection for the component displays is accomplished by a series of DIP switches activated by the Controller switch enable signals SW1 –...

  • Page 96: Diagram 21 Low Voltage Power Supply

    Circuit Theory When the signal from the inverted input is switched in, U101C grounds the base of Q111 and U103 or U102C, which provides the input signal to the emitter of Q111 through Q127, an emitter follower. The output of Q111 can be backporch clamped.
  • Page 97 Circuit Theory the drain voltage “flies back” in a positive direction. Current now flows in all of the secondary windings and supplies power. Line Rectifier and Filter The input line voltage is filtered by the rear-panel connector to reduce the electrical noise conducted into or out of the instrument.
  • Page 98 Circuit Theory The pulse width modulator works as follows: The oscillator resets the latch and U6 pin 6 goes high, turning the switcher mosfet on. The current through the switcher mosfet increases, causing the voltage across R90 to increase. This voltage is divided across R91 and R92, to input to the comparator (pin 3).

  • Page 99: Diagram 22 High Voltage Power Supply

    Circuit Theory Shutdown Logic U7 is a quad comparator, whose outputs are open collectors. All four comparator outputs are connected in parallel and under normal operating conditions are high. Whenever the output of any one of the comparators goes low, Q15 will turn off and the pulse width modulator current sense line will go high and shut down the power supply.
  • Page 100 Circuit Theory C25 and Q8 are a start delay circuit that holds the error amplifier output low, through CR12, until C25 is charged. Delaying the start of the high voltage oscillator allows the Low Voltage Power Supply to start, unencumbered by the load from the high voltage oscillator.

  • Page 101: Diagram 23 Xrom

    Circuit Theory Diagram 23 XROM This is a special circuit board that may be present in some 1740A/1750A–Series instruments. It is not used in the 1760–Series instruments. Where it is employed, it is physically located next to the CRT. Diagnostics and Circuit U5 is a parallel in/serial out shift register.
  • Page 102 Circuit Theory 1740A/1750A/1760 – Series Service Manual 3–38 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 103 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 104: Performance Verification

    Time Base: 10 ns/Div to 5 ms/Div sweep speeds, triggering to 50 MHz. For example: A TEKTRONIX TAS 465 Oscilloscope. Also 10X probe, P6109B, and 1X probe, P6119B. 2. Television Signal Generator Color test signals for the television standard of the monitor to be tested: color bar signal, linearity staircase and variable apl, pulse and bar;...
  • Page 105 Output Level Range: –11.55 dBm (200 mV) to 0.43 dBm (800 mV). Frequency: 50 kHz to 10 MHz. For example: TEKTRONIX SG503 installed in a TM500–Series Power Module. 6. Function Generator Range: 0.1 to 5 Vpp when loaded by 75 ; 10 Vpp when unloaded.
  • Page 106 For example: Tektronix Part No. 015-0408-00 (includes Peak-to-Peak Detector Head 015-0413-00) installed in a TM500–Series Power Module. 12. Power Module For powering and housing Tektronix SG503, FG503, DM501A, DC503A, 067-0916-00, and a 015-0408-00. For example: Tektronix TM500–Series Power Module. 13. Spectrum Analyzer Bandwidth up to 10 MHz and sensitivity up to 50 dB;...
  • Page 107 Three 75 cables required, one precision (1%) 50 cable required. For example: 75 – 42-inch (Tektronix Part No. 012-0159-00). 50 – 36-inch 1% precision (Tektronix Part No. 012-0482-00). 18. Dual Input Coupler Matched BNC cable-T for making phase comparisons between two inputs.

  • Page 108: Figure 4-1: External Horizontal Or Rgb/Yrgb Cable Adapter

    Performance Verification 19. External Horizontal/RGB and YRGB Cable Adapter SIGNAL FEMALE CONNECT GROUND 25-Pin Male Connector Figure 4–1: External Horizontal or RGB/YRGB Cable Adapter 20. Remote Sync Cable Adapter 25-Pin Male Connector FEMALE SIGNAL CONNECT GROUND Figure 4–2: Remote Sync Cable Adapter 1740A/1750A/1760 –...

  • Page 109: Figure 4-3: Audio And Timecode Cable Adapter

    Performance Verification 21. Audio and Timecode Cable Adapter 25-Pin Male Connector BANANA CONNECTORS +SIGNAL COMMON –SIGNAL Figure 4–3: Audio and Timecode Cable Adapter 1740A/1750A/1760 – Series Service Manual 4–6 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 110: Performance Check Procedure Short-Form Reference

    Performance Verification Performance Check Procedure Short-Form Reference The short-form reference table is intended for those who are familiar with the complete Performance Check procedure. Step and page numbers provide easy cross-reference to the long-form procedure on the following pages. Table 4–1: Short-Form Performance Check Step # Step Name Step Requirement...
  • Page 111 Performance Verification Table 4–1: Short-Form Performance Check Step # Step Name Step Requirement Page # Restorer Response 60 Hz (50 Hz PAL) Attenuation: Slow Mode 10%. Fast Mode 4–24 95%. DC Restorer Blanking Shift Blanking shift with Presence or Absence of Burst: 1 IRE (7 4–25 mV PAL).
  • Page 112 Performance Verification Table 4–1: Short-Form Performance Check Step # Step Name Step Requirement Page # Bowtie Gain and Offset (1760–Series Only) Bowtie gain matches CH-A1 INPUT gain 2%. Bowtie DC 4–39 offset between channels <5 mV. Bowtie Common Mode Rejection Ratio 34 dB at 3 MHz.

  • Page 113: Performance Check Procedure

    Performance Verification Performance Check Procedure 1. Preliminary Setup a. Connect the 1740A/1750A/1760–Series ac power cord to the variable autotransformer. Set the mains Power switch for the autotransformer to On and set the autotransformer to the local nominal mains voltage (110 V or 220 V). b.
  • Page 114 Performance Verification Power Supply Operation Requirement – Stable operation over an ac input range of 90 - 250 V. a. Vary the autotransformer from low-line to high-line voltage (90 - 132 V for 110 V, or 180 - 250 V for 220 V operation). b.
  • Page 115 Performance Verification d. Check – that the CH-A and CH-A1 baselines are within 1 IRE (7 mV PAL) of each other (1 major division). e. Check – that the CH-A2 and CH-A3 baselines are within 1 IRE (7 mV PAL) of the CH-A baseline (1 major division) by moving the dual-input coupler to each respective input channel.
  • Page 116 Performance Verification u. Check – that the CH-B1, CH-B2, and CH-B3 baselines are within 1 IRE (7 mV PAL) of the CH-A baseline (1 major division) by moving the dual-input coupler to each respective input channel. v. Turn on the DC REST and select EXT REF. w.
  • Page 117 Performance Verification b. Horizontally center the display, and then turn on the MAG SWEEP. c. Check – that part of the sync pulse and burst is displayed. d. Check – by adjusting the HORIZ POS control, that both ends of the display can be positioned past the center of the CRT.
  • Page 118 Performance Verification h. Enter the CONFIG menu and select CAL SIG OFF. Exit the CONFIG menu. Connect the output of the Multiburst generator to the digital counter. Set the Multiburst generator to Low, Continuous, Manual, and turn the Markers Off. Adjust the Multiburst frequency to 5.0 MHz. Replace the color bar signal on the CH-A INPUT with the multiburst signal.
  • Page 119 Performance Verification c. Check – that the signal display is 140 IRE 1.4 IRE (1.0 V 10 mV PAL). d. Enter the GAIN menu and select X5. If desired, press the CLEAR MENU button to remove the readout. e. Set the VAC amplitude to 199.9 mV. Check –...

  • Page 120: Figure 4-4: Timing Cursor Check

    Performance Verification 10. Voltage, Timing, and Vector Cursors Requirement – Voltage Accuracy: 0.5%. Timing Accuracy: 0.5%, for line rate sweeps. Vector Accuracy: Gain 1.5%, Phase a. Set the VAC amplitude to 999.9 mV. b. Vertically position the signal to range from the 100 IRE to the –40 IRE graticules (1.0 V to the 0 V graticules PAL).

  • Page 121: Table 4-2: Vector Cursor Readout Values

    Performance Verification Replace the VAC output on the CH-A INPUT with the color bar signal. Terminate the loop-through in 75 k. Select VECTOR DISPLAY. Adjust the AMPLITUDE and PHASE bezel knob controls for readouts of 0.0 IRE (0.0 mV PAL) and 0.0 . Exactly center the vector display using the VERT and HORIZ POS controls.
  • Page 122 Performance Verification e. Connect a 75 cable from the 1740A/1750A/1760–Series PIX OUT to the test oscilloscope, terminating the oscilloscope end of the cable with a 75 feedthrough terminator. Check – for a signal amplitude on the test oscilloscope of 1 V 0.75 minor division.
  • Page 123 Performance Verification h. Check – that the signal amplitude is 100 IRE 2 IRE (700 mV 14 mV PAL) while varying the leveled sine wave generator frequency from 1.0 to 10.0 MHz. Remove the Peak-to-Peak Detector Head from the CH-A INPUT and terminate the loop-through in 75 .
  • Page 124 Performance Verification b. Set the function generator for a sine wave output. Adjust the frequency to 15 kHz and adjust the amplitude for a 100 IRE (700 mV PAL) display on the 1740A/1750A/1760–Series. c. Enter the FILTER menu. d. Check – by switching between FLAT and LUM(CRT menu), that the amplitude changes 1 IRE (7 mV PAL).
  • Page 125 Performance Verification 14. Chrominance Filter Gain and Frequency Response (Waveform Display) Requirement – Gain: a. Enter the GAIN menu and select X1. Exit the GAIN menu. b. Enter the FILTER menu and select FLAT. c. Adjust the leveled sine wave generator amplitude for a 100 IRE (700 mV PAL) display on the 1740A/1750A/1760–Series.
  • Page 126 Performance Verification b. Set the leveled sine wave generator frequency to 3.58 MHz (4.43 MHz PAL), and adjust the amplitude to place the signal on the compass rose. c. Set the leveled sine wave generator frequency to 2.98 MHz (3.83 MHz PAL).
  • Page 127 Performance Verification a. Select 2 LINE SWEEP (10 s/div) and turn on the MAG SWEEP. b. Set the pulse and bar signal controls as follows: Overlay On, Amplitude Full, Luminance On, Setup Off (NTSC only), Window Off, Field Sq Wave Off, Burst On, T Pulse On, and T Bar On. c.

  • Page 128: Figure 4-5: Fast Dc Restorer Response

    Performance Verification h. Check – that the displayed amplitude is 126 IRE (900 mV PAL). Enter the CONFIG menu and select DC RESTORER FAST. Enter the GAIN menu and select X10. Press the CLEAR MENU button. Select 2 FIELD SWEEP and EXT REF. k.
  • Page 129 Performance Verification b. Replace the function generator output on the CH-A INPUT with the color bar signal from the television signal generator. Leave the loop-through connector terminated. c. Enter the GAIN menu and select X10 . If desired, press the CLEAR MENU button to remove the readout.
  • Page 130 Performance Verification Replace the linearity signal on the CH-A INPUT with the output from the leveled sine wave generator. Leave the loop-through terminated. Enter the FILTER menu and select FLAT. If desired, press the CLEAR MENU button to remove the readout. k.

  • Page 131: Figure 4-6: R-Y Display

    Performance Verification d. Enter the CONFIG menu. Select VECTOR, then select VECTOR TEST e. Check – for the best overlay of the circles without any separation, and best center dot overlay (should appear to be one dot). Exit the CONFIG menu, then enter the GAIN menu. Select VARIABLE OFF.
  • Page 132 Performance Verification c. Check – that the dots on the vector display are clear and do not have tails and the lines between the dots are reasonably straight. d. Select 100% bars on the color bar signal. e. Enter the CONFIG menu. Select VECTOR, then select 100% BARS. If desired, press the CLEAR MENU button to remove the readout.
  • Page 133 Performance Verification 25. Burst Phase with Burst Amplitude Change Requirement – Phase Shift with Burst Amplitude Change of 6 dB: a. Remove the color bar signal from the CH-A INPUT. Move the black burst signal from the EXT REF INPUT and connect it to the CH-A INPUT.
  • Page 134 Performance Verification Enter the GAIN menu and select VARIABLE OFF. Exit the GAIN menu. 28. Clamp Stability, Phase Control, and Position Control Range Requirement – Clamp Stability: 1/64 inch (0.4 mm). Phase Control Range: 360 continuous rotation. Position Control Range: 0.236 inch (6 mm) from center.
  • Page 135 Performance Verification 30. RGB/YRGB Requirement – Staircase Input Gain: 0.8 division 10%. Sweep Length: RGB – 33% of normal, YRGB – 25% of normal. a. In the CONFIG menu select REM INPUT:STAIRCASE. b. Set the function generator amplitude to 0 to +10 V as measured on the test oscilloscope.

  • Page 136: Table 4-3: Audio And Timecode Values

    Performance Verification h. Enter the GAIN menu and select 0 DBM. Connect the function generator output to the REMOTE INPUT connector pin 12. Check – for a 140 IRE display 7 IRE (1.0 V 50 mV PAL). k. Repeat parts a. through j. using the Gain and signal amplitude settings in Table 4–3.

  • Page 137: Figure 4-7: Audio Display

    Performance Verification Figure 4–7: Audio Display Set the function generator frequency to 500 kHz. g. Check – that the audio trace extends past the compass rose. h. Select TIMECODE DISPLAY. Check – for a display amplitude of 98 IRE (700 mV PAL). 33.
  • Page 138 Performance Verification g. Check – the display for a locked sine wave. h. Set the function generator frequency to 90 Hz. Check – the display for a locked sine wave. Remove the function generator output and the Remote Cable Adapter from the 1740A/1750A/1760–Series.
  • Page 139 Performance Verification m. Connect the precision high-frequency terminator to the Device Under Test connector on the RF Bridge. n. Check – that the frequency response from 0 MHz to 6 MHz is 40 dBm. o. Return the spectrum analyzer frequency marker to 6 MHz if it was moved.
  • Page 140 Performance Verification g. Check – that the SCH dots are within 5 of the 0 SCH line when either EXT or INT REF are selected . Note: Leave INT REF selected. h. Enter the LINE SELECT menu and select Line 11 (Line 7 PAL) using the LINE SELECT control (bezel knob).
  • Page 141 Performance Verification c. Enter the CONFIG menu. Select VECTOR and then select BARS 100%. d. In the Config menu, select FORMAT, then select LIGHTNING DISPLAY, and then select SMPTE/EBU. e. Check – that the component vector dots are in the graticule boxes 2.5%.

  • Page 142: Figure 4-8: Option Blanking Pulse

    Performance Verification b. Connect a X10 probe from the CH1 oscilloscope input to A7U602 pin 9. c. Set the oscilloscope for 10 s/Div and position the sync pulse (CH2) to the CRT graticule center. d. Select X10 Mag on the oscilloscope. e.

  • Page 143: Figure 4-9: Bowtie Common Mode Rejection Ratio

    Performance Verification g. Check – that the offset between the two lines is less than 0.5 major divisions. h. Connect the component signals Y, B–Y, and R–Y to the CH-B1, CH-B2, and CH-B3 INPUTs respectively. Terminate the loop-throughs in 75 . Leave the signal generator set for 100% SMPTE Color Bars.
  • Page 144 Performance Verification Disconnect the T connector and terminator from the CH-A1 and CH-A2 INPUTs. g. Connect the component signals Y, B-Y, and R–Y to the CH-A1, CH-A2, and CH-A3 INPUTs respectively. Terminate the loop-throughs in 75 . h. Select Bowtie on the component signal generator. From the GAIN menu select X1.
  • Page 145 Performance Verification d. In the CONFIG menu select VECTOR, then select 100% BARS. e. Check – for an opening of < 2 minor divisions on the vertical transition. 43. GBR Picture Monitor Outputs (1760–Series Only) Requirement – Accuracy: a. Connect the G OUTPUT to the test oscilloscope using a 75 feed- through terminator.
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  • Page 147: Adjustment Procedures

    30 MHz Bandwidth, 2 mV Sensitivity. Time Base: 10 ns/div to 5 ms/div sweep speeds, Triggering to 50 MHz. For example: A TEKTRONIX TAS 465 Oscilloscope. Also 10X probe, P6109B, and 1X probe, P6119B. 1740A/1750A/1760 – Series Service Manual 5–1...
  • Page 148 Color test signals for the television standard of the monitor to be tested: Color bar signal, multiburst signal, and black burst signal. For example: NTSC Tektronix 1410 with Option AA and Option AB (modified SPG2 and TSG7), TSG3, and TSG5. PAL Tektronix 1411 with Option AA and Option AB (modified SPG12 and TSG17), TSG13, and TSG15.
  • Page 149 For example: Tektronix Part No. 015-0408-00 (includes Peak-to-Peak Detector Head 015-0413-00) installed in a TM500–Series Power Module. 11. Power Module For powering and housing Tektronix SG505, FG503, DM501A, DC503A, 067-0916-00, and a 015-0408-00. For example: Tektronix TM500–Series Power Module. 12. Low-Distortion Oscillator 1-kHz balanced output, 387 mV to 1.54 V amplitude.
  • Page 150 Terminators Six required; two should be end-line, and four should be feed-through type. For example: End-line, 75 terminator (Tektronix Part No. 011-0102-00). Feed-through, 75 terminator (Tektronix Part No. 011-0103-02). 14. Coaxial Cable Three 75 cables required; one 50 cable required.

  • Page 151: Figure 5-1: External Horizontal/Rgb And Yrgb Cable Adapter

    Adjustment Procedure 17. External Horizontal/RGB and YRGB Cable Adapter SIGNAL FEMALE CONNECT GROUND 25-Pin Male Connector Figure 5–1: External Horizontal/RGB and YRGB Cable Adapter 18. Remote Sync Cable Adapter 25-Pin Male Connector FEMALE SIGNAL CONNECT GROUND Figure 5–2: Remote Sync Cable Adapter 1740A/1750A/1760 –...

  • Page 152: Figure 5-3: Audio And Timecode Cable Adapter

    Adjustment Procedure 19. Audio and Timecode Cable Adapter 25-Pin Male Connector BANANA CONNECTORS +SIGNAL COMMON –SIGNAL Figure 5–3: Audio and Timecode Cable Adapter 1740A/1750A/1760 – Series Service Manual 5–6 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 153: Figure 5-4: Rs232 Cable Standard And Alternate Hookups For 9-Pin Pc Connector

    Adjustment Procedure 20. RS232 Cable Connector or adapter which allows hookup between the PC and the waveform monitor. Figure 5–4 shows the cable connections for a 9-pin PC connector. For a 25-pin to 9-pin adapter, construct one as shown in Figure 5–5 or purchase an RS232 DTE cable or adapter.

  • Page 154: Figure 5-5: Rs232 Cable Standard And Alternate Hookups For 25-Pin

    Adjustment Procedure 25-Pin Female 9-Pin Male Connector Connector 25-Pin Female 9-Pin Male Connector Connector Figure 5–5: RS232 cable standard and alternate hookups for 25-pin PC connector Optional Equipment 21. Magnifying Glass For aid in viewing CRT graticule as necessary. 1740A/1750A/1760 – Series Service Manual 5–8 Artisan Technology Group - Quality Instrumentation ...

  • Page 155: Getting Started

    Adjustment Procedure Getting Started 1. Initial Equipment Setup a. Connect an RS232 cable from the 1740A/1750A/1760–Series rear-panel RS232 connector to the COM 1, 2, 3, or 4 connector on the PC. See the Required Equipment List for the cable wiring illustrations. NOTE.
  • Page 156 Adjustment Procedure NOTE. PC Floppy Drive On PCs the drive letter for the floppy drive may be A or B. Enter the appropri- ate letter for your floppy drive in the following step. c. At the PC DOS prompt, type the drive letter for the floppy drive to be used followed by a colon, and then press the Return key.

  • Page 157: Functional Description Of Pc Display

    Adjustment Procedure Functional Description of PC Display Figure 5–6: Typical Adjustment Procedures PC screen display This box lists the instrument type and which procedure is being performed. This box lists the current step number and how many steps there are in the procedure being performed.
  • Page 158 Adjustment Procedure This box lists the active function keys which can be pressed during the program. They function as follows: Pressing this key brings up the Help Menu. Pressing this key brings up the Setup Window which details the initial equipment connections for that particular step.

  • Page 159: Circuit Board Adjustment Locations

    Adjustment Procedure Selects X10 as the adjustment size. X10 is the default adjustment size and is used to bring an adjustment close to proper position. Selects X100 as the adjustment size. X100 is the largest adjustment size and is used to rough in adjustments that are far out of position. This box displays the current arrow key adjustment size.
  • Page 160 Adjustment Procedure R168 C131 R182 C135 C137 R183 C151 C154 R134 R135 Figure 5–8: A3 Main Board C106 C109 Figure 5–9: A5 Vector Board 1740A/1750A/1760 – Series Service Manual 5–14 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 161 Adjustment Procedure R173 Figure 5–10: A6 SCH Board C136 C135 U126 R122 C111 U161 R601 R159 Figure 5–11: A7 Component Board 1740A/1750A/1760 – Series Service Manual 5–15 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 162: Waveform Illustrations

    Adjustment Procedure Waveform Illustrations The following waveform illustrations are provided as a reference. The illustra- tions are of the 1765 unless otherwise noted. Figure 5–12: Adjusting for thinnest Luminance Step Figure 5–13: Matching Flat and Luminance Filter responses 1740A/1750A/1760 – Series Service Manual 5–16 Artisan Technology Group - Quality Instrumentation ...
  • Page 163 Adjustment Procedure 50uS Figure 5–14: Adjusting the NTSC SCH on the oscilloscope Figure 5–15: Matching the SCH dot flipping points 1740A/1750A/1760 – Series Service Manual 5–17 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 164 Adjustment Procedure 50% POINT 100mV Figure 5–16: Adjusting the Option Blanking Pulse Figure 5–17: Adjusting for minimum Bowtie amplitude 1740A/1750A/1760 – Series Service Manual 5–18 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 165 Adjustment Procedure Figure 5–18: Adjusting Diamond Display phase 1740A/1750A/1760 – Series Service Manual 5–19 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 166 Adjustment Procedure 1740A/1750A/1760 – Series Service Manual 5–20 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 167 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 168: Maintenance

    Service Options A number of servicing options are available. They range from returning the instrument to Tektronix for repair and/or recalibration, to a major assembly exchange, to full component level servicing, by customer (at the installation site). Each of these options should be investigated as to which will be the most time efficient and cost effective.

  • Page 169: Replacing And Cleaning The Air Filter

    Additional Air Filters. Additional air filters can be ordered directly from Tektronix. The part number for the air filters is listed with the optional accessories at the rear of the Mechanical Replaceable Parts list, at the back of the book.

  • Page 170: Static-Sensitive Components

    Maintenance Periodic checks of the transistors and integrated circuits are not recommended. The best measure of performance is the actual operation of the component in the circuit. Static-Sensitive This instrument contains electrical components that are susceptible to damage Components from static discharge. Static voltages 1 kV to 30 kV are common in unprotected environments.

  • Page 171: Determining The Software Version

    Maintenance 9. Use a soldering iron that is connected to earth ground. NOTE. 10. Use only special antistatic, suction, or wick-type desoldering tools. Determining the Software Operation of this instrument is dependent on the software, which is loaded in Version Flash EPROM.
  • Page 172 Maintenance 1. Ensure that the malfunction exists in the instrument. This is done by making sure that the instrument is operating as intended by Tektronix (see Operating Instructions), and by checking that a malfunction has not occurred up stream from the waveform monitor.

  • Page 173: Line Fuse Replacement

    Maintenance Line Fuse Replacement This instrument is protected with an F-type cartridge fuse, located in a holder, directly above the line cord receptacle on the rear panel. The fuse should only be replaced with the correct type and value. Using a higher rated or slo blo fuse could cause circuit damage.

  • Page 174: Low Volts Supply

    Maintenance Table 6–2: Power Supply Fault Symptoms Symptom Procedure Line fuse open Rectifier/Switcher/Snubber Check Power Supply cycles OFF/ON Output Check Note: Check instrument for shorts. Error Amplifier Check Shutdown Logic Check Does not power up Controller/Gate Drive Check Transformer Driver Check Error Amplifier Check Shutdown Logic Check Rectifier/Switcher/Snubber Check...
  • Page 175 Maintenance CAUTION. Do not proceed until the drain of Q14 is near 0 V. Dangerous voltage potentials are present in the circuit until the capacitors discharge. 2. Rectifier/Switcher/Snubber Check a. Use the digital multimeter to measure the voltage between TP2 and TP3. Be sure the voltage is near 0 V before proceeding.

  • Page 176: Table 6-4: Control Circuit Test Points

    Maintenance 4. Controller/Gate Drive Check a. Connect the negative 20 Vdc Power Supply output to TP3. Connect the positive output to the cathode of CR22. Short the emitter and base of Q15 together. Connect the oscilloscope probe ground to TP3. b.

  • Page 177: Table 6-5: Shut Down Logic Levels

    Maintenance g. Using the oscilloscope, observe the signal at the collector of Q13. With J3 un shorted this point should have a 1 V, 170 kHz sine wave riding on 5 Vdc. With J3 shorted this point should be at 5 Vdc. 6.

  • Page 178: High Volts Supply

    Maintenance d. Using the digital multimeter, measure the voltage at U6, pin 3. It should be approximately 5 Vdc. Short the base to the emitter of Q15. Pin 3 should now measure 0 V. High Volts Supply WARNING. Dangerous potentials exist on this circuit board. Extreme care should be exercised in troubleshooting these circuits.

  • Page 179: Table 6-7: High Voltage Oscillator Test Points

    Maintenance 4. Grid Drive Check a. Turn off the Power Supply. Use the diode check on the digital multime- ter to test CR2, CR5, CR6, CR8, and CR9 for shorts. b. Power up the Power Supply. c. Using the digital multimeter, measure the voltage between TP1 and the cathode of CR8.

  • Page 180: Corrective Maintenance

    NOTE. When considering which service offerings best suit the current need, remember that Tektronix provides a limited parts and service warranty for all its products. No customer repairs should be attempted during the warranty period for this instrument.

  • Page 181: Table 6-8: 1740A/1750A/1760-Series Replacement Circuit Boards

    Maintenance NOTE. Circuit boards that are damaged due to mishandling or containing modifications not originated by Tektronix are not acceptable for the exchange program. When calling in to arrange for a circuit board exchange it is essential that you have some key information ready to relay to our technician. The instrument type and serial number, along with installed options are absolutely essential.

  • Page 182: Factory Replacement Parts

    (if known) ensures that you will receive the module required to return the instrument to complete operation. Factory Replacement Replacement parts are available through the local Tektronix field office or Parts representative. However, many common electronic parts are available through local sources.

  • Page 183: Etched Circuit Boards

    Maintenance Etched Circuit Boards The individual instruments for this series have many common etched circuit boards. The differences between members of this family are largely defined by the etched circuit boards making up the instrument. All of the circuit boards are designated as assemblies.
  • Page 184 Maintenance Figure 6–1 shows the locations of all circuit board assembles for the 1760–Series Option SC. Most of the circuit boards shown in the illustration are used by the 1740A/1750A–Series also. See Table 6–9. A8 is used in some 1740A–Series and 1750A–Series instruments, it contains additional Flash EPROM.

  • Page 185: Major Assembly Interconnection

    Maintenance Major Assembly Signals and power supply voltages are passed through the instrument with a Interconnection system of interconnecting cables. The connector holders, on these cables, have numbers that identify terminal connectors; numerals are used from pin 2 up. A triangular key symbol is used to identify pin 1 on the circuit board to assist in aligning connector with correct square pins.

  • Page 186: Mechanical Disassembly/Assembly

    Maintenance Mechanical Disassembly/Assembly The instructions contained here are for disassembly. Reassembly is performed by reversing the order of the steps used to disassemble the instrument. WARNING. Before attempting any disassembly of the instrument be sure to disconnect the power cord. CAUTION.

  • Page 187: Graticule Light Removal And Replacement

    NOTE. All screws, unless otherwise noted, are TORX screws and can be removed with a T15 screwdriver tip (Tektronix part number 003-0966-00). The exception is #2 Pozidrive screws which can be removed with a #1 Pozidrive tip (003-0443-00).
  • Page 188 Maintenance Figure 6–4: Replacing graticule light bulbs 3. To install a bulb, hold it with the tweezers or fingers as described in step two, position it in front of the socket, and push the bulb with your finger until it snaps into place. 4.

  • Page 189: Connector

    Maintenance CRT Removal 1. Remove the bezel. WARNING. The CRT may retain a dangerous charge. Ground the conductor of the anode to discharge the CRT. Do not allow the conductor to touch your body or any circuitry. 2. Disconnect the anode, by separating the connector. Do not touch the exposed tip of the connector.

  • Page 190: Replacement Of The Crt

    Maintenance 4. Hold one hand in front of the CRT. Grasp the CRT just behind the anode cap and push the CRT straight out (some pressure is needed). Replacement of the CRT 5. Reposition the metal CRT shield on the CRT base mounting. 6.

  • Page 191: 1740A/1750A/1760 - Series Service Manual

    Maintenance Removing the Rear Panel 1. Remove the nine rear screws. See Figure 6–6. and the Input and BNC Circuit Boards Figure 6–6: Removing the rear panel and Input/BNC assembly 2. Unplug the plug from J12 on the Main (A3) etched circuit board. 3.
  • Page 192 Maintenance Figure 6–7: Disassembling Input/BNC assembly A4/A4–A1 CAUTION. The Input circuit board assembly uses surface mount components. Do not attempt to solder on this board unless you have been trained in micro soldering and have the proper tools available. 7. To replace the rear panel and Input assembly, reverse the procedure. 1740A/1750A/1760 –...

  • Page 193: Removing The Front Panel And The Front Panel Circuit Board

    Maintenance Removing the Front Panel 1. Remove the blue multiwire connector from J154. and the Front Panel 2. Push down on the clip located on the top of the front-panel assembly and Circuit Board push outward on the upper part of the assembly. See Figure 6–8. Figure 6–8: Removing the front–panel assembly 3.

  • Page 194: Removing The Main Board

    Maintenance Figure 6–9: Front Panel circuit board assembly b. The board should now separate from the front panel, spacer, and the switches to make the components accessible. 5. To re–assemble, reverse the procedure. Removing the Main Board 1. Remove the plugs from the connectors as shown in Table 6–10. Table 6–10: Main Board Plug Connections Plug from- Jack...
  • Page 195 Maintenance 2. Use a -inch Allen wrench to remove the five front-panel knobs immediately below the CRT. Remove the small panel from immediately below the CRT bezel. See Bezel removal instructions. 3. Slip the CRT and trace rotation leads through the appropriate holes in the Main board.

  • Page 196: Removing The Power Supply Board

    Maintenance 8. To replace the Main board, lay the board flat and slide it back into place. 9. To complete the replacement of the board, reverse the rest of the steps. Removing the Power 1. Be sure that the instrument is unplugged from the mains and that DS7 on Supply Board the Power Supply is extinguished.

  • Page 197: Removing The Vector Board

    Maintenance WARNING. The CRT may retain a dangerous charge. Ground the conductor of the anode to discharge the CRT. Do not allow the conductor to touch your body or any circuitry. 4. Remove the connectors on J1, J2, J4, and J5. 5.
  • Page 198 Maintenance 3. Remove the three screws holding the circuit board in place. See Figure 6–12. 4. Move top of circuit board out and up to remove. 5. To reinstall the circuit board reverse the procedure. Removing the SCH Board 1. Unplug the cable from A5J1 (Vector circuit board). (1750A–Series &...

  • Page 199: Removing The Component Board (1760–Series Only)

    Maintenance NOTE. Not all 1740A/1750A–Series instruments contain an XROM circuit board. 3. Move the circuit board up to remove. 4. To reinstall the circuit board reverse the procedure. Removing the Component 1. Unplug the connectors on A7J9, J11, and J13. Board 2.

  • Page 200: Repackaging

    Repackaging Identification Tag If the instrument is to be shipped to a Tektronix Service Center for service or repair, attach a tag to the instrument showing: 1. Owner (with complete address) and the name of the person at your firm that can be contacted.
  • Page 201 Maintenance for cushioning. The shipping carton should have a test strength of at least 275 pounds. 2. Surround the instrument with polyethylene sheeting to protect the finish. 3. Cushion the instrument on all sides by tightly packing dunnage or urethane foam between the carton and the instrument. Allow three inches on all sides for cushioning.
  • Page 202 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 203: Options

    A6 Assembly (SCH circuit board and appropriate software). Option SC is a catalog option to allow the instrument to make all measurements that the 1750A–Series can make. Existing instruments can be upgraded; contact your nearest Tektronix representative or sales office for more information. Power Cord Options Any of the following power cord options can be ordered for the 1740A/1750A/1760–Series.
  • Page 204 Options Table 7–1: Power Plugs Available for These Instruments Power Plug Description Standard 120 V 3-prong power plug, on a 2.5 meter long power cord, for use with common ground systems in North America. Option A1 Universal Europe 220 V/16 A Locking Power Plug, on a 2.5 meter long power cord.

  • Page 205: Crt Options

    There are two optional cabinets and a dual rack adapter available for the installation of these instruments. Only a brief descrip- tion is provided here; for more information contact a Tektronix field office or distributor.

  • Page 206: Carrying Case (1700F02)

    Options Carrying Case (1700F02) This is a silver-grey, metal cabinet, with feet, front elevating bail, and carrying handle designed for portable applications. Figure 7–2: The 1700F02 portable carrying case Side-by-Side Rack This is a 19-inch, rack mounting adapter that accepts two 1700–Series instru- Adapter (1700F05) ments in a side-by-side configuration.

  • Page 207: Blank Panel (1700F06)

    Options Blank Panel (1700F06) If only one 1700–Series instrument is to be installed in the Side-by-Side Rack Adapter, a blank panel (1700F06) can be installed for air flow protection, and appearance. 1700F06 Figure 7–4: A1700F05 with a blank front-panel (1700F06) 1740A/1750A/1760 –...

  • Page 208: Utility Drawer (1700F07)

    Any of these items can be ordered with the 1740A/1750A/1760–Series instru- ment. In addition, these items are available, along with accessory items listed in this manual, from your nearest Tektronix field office or distributor. Be sure to include both the name and number of any Field Upgrade Kits ordered.
  • Page 209 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 210: Index

    1740A/1750A/1760–Series. Use this list to identify and order replacement parts. There is a separate Replaceable Electrical Parts list for each instrument. Parts Ordering Information Replacement parts are available from or through your local Tektronix, Inc., Field Office or representative. Changes to Tektronix instruments are sometimes made to accommodate improved components as they become available and to give you the benefit of the latest circuit improvements.
  • Page 211 Chassis-mounted parts and cable assemblies have no assembly number prefix and are located at the end of the electrical parts list. Tektronix Part No. Indicates part number to be used when ordering replacement part from (Column 2) Tektronix.
  • Page 212 76493 BELL INDUSTRIES INC 19070 REYES AVE COMPTON CA 90224–5825 JW MILLER DIV PO BOX 5825 80009 TEKTRONIX INC 14150 SW KARL BRAUN DR BEAVERTON OR 97077–0001 PO BOX 500 84411 AMERICAN SHIZUKI CORP 301 WEST O ST OGALLALA NE 69153–1844...
  • Page 213 Replaceable Electrical Part Mfr. Code. Manufacturer Address City, State, Zip Code S3629 SCHURTER AG H 2015 SECOND STREET BERKELEY CA 94170 C/O PANEL COMPONENTS CORP S4307 SCHAFFNER ELECTRONIK AG LUTERBACH SWITZERLAND TK0510 PANASONIC COMPANY ONE PANASONIC WAY SECAUCUS NJ 07094 DIV OF MATSUSHITA ELECTRIC CORP TK0978 KINSEKI LTD...
  • Page 214 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number 671–2484–00 B010100 B011701 CIRCUIT BD ASSY:POWER SUPPLY 80009 671–2484–00 671–2484–01 B011702 B012075 CIRCUIT BD ASSY:POWER SUPPLY 80009 671–2484–01 671–2484–02...
  • Page 215 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number *END ATTACHED PARTS* A1C1 283–0429–00 CAP,FXD,CER DI:270PF,20%,2000V 51406 DHR12–Z5U271M–2K A1C2 281–0775–01 CAP,FXD,CER:MCL;0.1UF,20%,50V,Z5U,0.170 X 0.100;AX 04222 SA105E104MAA A1C3 283–0021–00 CAP,FXD,CER DI:0.001UF,20%,5000V...
  • Page 216 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A1C40 290–1309–00 671–2484–02 CAP,FXD,AL:100UF,20%,63V,10 X 20MM,RDL,105 DEG,L0W 80009 290–1309–00 Z,T&A A1C41 290–1267–00 CAP,FXD,AL:560UF,20%,50V,12.5 X 31.5,LOW IMP;RDL 80009 290–1267–00 A1C42 281–0773–00...
  • Page 217 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number *ATTACHED PARTS* 210–0406–00 NUT,PLAIN,HEX:4–40 X 0.188,BRS CD PL 73743 12161–50 211–0008–00 SCR,MACH:4–40 X 0.25,PNH,STL 93907 ORDER BY DESCR 214–3841–00...
  • Page 218 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A1J4 131–3392–00 CONN,HDR:PCBMALE,STR,1 X 10,0.1 CTR,0.230 MLG X 80009 131–3392–00 0.120 TAIL,30 GLD,BD RETENTION A1J5 131–4794–00 CONN,HDR:PCBMALE,STR,1 X 2,0.1 CTR,0.235 MLG X 80009 131–4794–00...
  • Page 219 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A1Q14 151–1286–00 XSTR,PWR:MOS,N–CH;800V,4.0A,3.0 80009 151–1286–00 OHM;BUK456–800A,TO–220 *ATTACHED PARTS* 210–0406–00 NUT,PLAIN,HEX:4–40 X 0.188,BRS CD PL 73743 12161–50 211–0008–00 SCR,MACH:4–40 X 0.25,PNH,STL...
  • Page 220 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A1R36 315–0102–03 RES,FXD,CMPSN:1K OHM,5%,0.25W 80009 315–0102–03 A1R37 322–3385–00 RES,FXD:MET FILM;100K OHM,1%,0.2W, TC=100 57668 CRB20 FXE 100K PPM;AX,T&R,SM BODY A1R38 311–2239–00...
  • Page 221 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A1R70 303–0100–00 RES,FXD,CMPSN:10 OHM,5%,1W,CMPSN OR FILM 80009 303–0100–00 A1R71 322–3222–00 RES,FXD:MET FILM;2K OHM,1%,0.2W, TC=100 57668 CRB20 FXE 2K00 PPM;AX,T&R,SM BODY...
  • Page 222 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A1R105 322–3431–00 RES,FXD,FILM:301K OHM,1%,0.2W, TC=T0 57668 CRB20 FXE 301K A1R106 322–3339–00 RES,FXD:MET FILM;33.2K OHM,1%,0.2W, TC=100 80009 322–3339–00 PPM;AX,T&R,SM BODY A1R107 322–3239–00...
  • Page 223 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A2CR1 152–5038–00 DIO,SIG:30V,1.5PF,VF = 600MV @ 80009 152–5038–00 10MA;MMBD301L,SOT–23,8MM T&R A2CR2 152–5038–00 DIO,SIG:30V,1.5PF,VF = 600MV @ 80009 152–5038–00 10MA;MMBD301L,SOT–23,8MM T&R...
  • Page 224 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A2DS26 150–5008–00 671–2356–00 671–2356–00 DIO,OPTO: 50434 HLMP–6505 OPT21 A2DS26 150–5011–00 671–2356–01 DIO,OPTO: 80009 150–5011–00 A2DS27 150–5008–00 671–2356–00 671–2356–00...
  • Page 225 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A2R18 321–5045–00 RES,FXD:THK FILM;68.1 OHM,1%,0.125W, TC=100 80009 321–5045–00 PPM;1206,T&R A2R19 321–5045–00 RES,FXD:THK FILM;68.1 OHM,1%,0.125W, TC=100 80009 321–5045–00 PPM;1206,T&R A2R20 321–5045–00...
  • Page 226 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A2R49 321–5045–00 RES,FXD:THK FILM;68.1 OHM,1%,0.125W, TC=100 80009 321–5045–00 PPM;1206,T&R A2R50 321–5045–00 RES,FXD:THK FILM;68.1 OHM,1%,0.125W, TC=100 80009 321–5045–00 PPM;1206,T&R A2R51 321–5045–00...
  • Page 227 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A3C10 283–5098–00 CAP,FXD,CER:MLC;0.1UF,+80%–20%,50V,Z5U,1206;SMD,8 04222 12065E104ZAT3A MM T&R A3C11 283–5098–00 CAP,FXD,CER:MLC;0.1UF,+80%–20%,50V,Z5U,1206;SMD,8 04222 12065E104ZAT3A MM T&R A3C12 283–5098–00 CAP,FXD,CER:MLC;0.1UF,+80%–20%,50V,Z5U,1206;SMD,8 04222 12065E104ZAT3A MM T&R...
  • Page 228 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A3C48 283–5098–00 CAP,FXD,CER:MLC;0.1UF,+80%–20%,50V,Z5U,1206;SMD,8 04222 12065E104ZAT3A MM T&R A3C49 283–5098–00 CAP,FXD,CER:MLC;0.1UF,+80%–20%,50V,Z5U,1206;SMD,8 04222 12065E104ZAT3A MM T&R A3C50 283–5197–00 CAP,FXD,CER:MLC;330PF,5%,100V,NPO,1206;SMD,8MM 04222...
  • Page 229 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A3C77 283–5098–00 CAP,FXD,CER:MLC;0.1UF,+80%–20%,50V,Z5U,1206;SMD,8 04222 12065E104ZAT3A MM T&R A3C78 283–5314–00 CAP,FXD,CER: 80009 283–5314–00 A3C79 283–5098–00 CAP,FXD,CER:MLC;0.1UF,+80%–20%,50V,Z5U,1206;SMD,8 04222 12065E104ZAT3A MM T&R A3C80 283–5098–00...
  • Page 230 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A3C111 283–5189–00 671–2978–01 CAP,FXD,CER:MLC;220PF,5%,100V,NPO,1206;SMD,8MM 04222 12061A221JAT1A A3C111 283–5203–00 671–2355–00 671–2355–06 CAP,FXD,CER:MLC;1000PF,10%,100V,X7R,1206;SMD,8MM 04222 12061C102KAT1A A3C111 283–5189–00 671–2355–07 CAP,FXD,CER:MLC;220PF,5%,100V,NPO,1206;SMD,8MM 04222...
  • Page 231 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A3C153 283–5098–00 CAP,FXD,CER:MLC;0.1UF,+80%–20%,50V,Z5U,1206;SMD,8 04222 12065E104ZAT3A MM T&R A3C154 283–5106–00 CAP,FXD,CER:MLC;470PF,5%,100V,NPO,1206;SMD,8MM 80009 283–5106–00 A3C155 283–5014–00 CAP,FXD,CER:MLC;330PF,5%,50V,NPO,1206;SMD,8MM 80009 283–5014–00 A3C156 283–5098–00...
  • Page 232 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A3CR8 152–5047–00 DIO,SIG:ULTRA FAST;100V,0.74VF,4NS,2.0PF, COM– 80009 152–5047–00 CATH;MMBD1204,SOT–23,8MM T&R A3CR9 152–5018–00 DIO,SIG:ULTRA FAST;100V,0.74VF,4NS,2.0PF,SER– 80009 152–5018–00 PAIR;MMBD1203–HI,SOT–23,8MM T&R A3DS1 150–5008–00...
  • Page 233 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A3Q5 151–5000–00 XSTR,SIG:BIPOLAR,PNP;40V,200MA,250MHZ, 04713 MMBT3906LT1 AMPL;MMBT3906L,TO–236/SOT–23,8MM T&R A3Q6 151–5001–00 XSTR,SIG:BIPOLAR,NPN;40V,200MA,300MHZ, 80009 151–5001–00 AMPL;MMBT3904L,TO–236/SOT–23,8MM T&R A3Q7 151–5001–00 XSTR,SIG:BIPOLAR,NPN;40V,200MA,300MHZ, 80009 151–5001–00...
  • Page 234 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A3R3 321–5042–00 RES,FXD:THK FILM;39.2 OHM,1%,0.125W, TC=100 80009 321–5042–00 PPM;1206,T&R A3R4 321–5042–00 RES,FXD:THK FILM;39.2 OHM,1%,0.125W, TC=100 80009 321–5042–00 PPM;1206,T&R A3R5 321–5018–00...
  • Page 235 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A3R36 321–5026–00 RES,FXD:THK FILM;4.75K OHM,1%,0.125W, TC=100 80009 321–5026–00 PPM;1206,T&R A3R37 321–5026–00 RES,FXD:THK FILM;4.75K OHM,1%,0.125W, TC=100 80009 321–5026–00 PPM;1206,T&R A3R38 321–5026–00...
  • Page 236 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A3R66 321–5009–00 RES,FXD:THK FILM;182 OHM,1%,0.125W, TC=100 80009 321–5009–00 PPM;1206,T&R A3R67 321–5042–00 RES,FXD:THK FILM;39.2 OHM,1%,0.125W, TC=100 80009 321–5042–00 PPM;1206,T&R A3R68 321–5011–00...
  • Page 237 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A3R99 321–5030–00 RES,FXD:THK FILM;10.0K OHM,1%,0.125W, TC=100 80009 321–5030–00 PPM;1206,T&R A3R100 321–5031–00 RES,FXD:THK FILM;12.1K OHM,1%,0.125W, TC=100 80009 321–5031–00 PPM;1206,T&R A3R101 321–5036–00...
  • Page 238 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A3R130 321–5020–00 RES,FXD:THK FILM;1.5K OHM,1%,0.125W, TC=100 80009 321–5020–00 PPM;1206,T&R A3R131 321–5020–00 RES,FXD:THK FILM;1.5K OHM,1%,0.125W, TC=100 80009 321–5020–00 PPM;1206,T&R A3R132 321–5020–00...
  • Page 239 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A3R160 321–5012–00 RES,FXD:THK FILM;332 OHM,1%,0.125W, TC=100 80009 321–5012–00 PPM;1206,T&R A3R161 321–5012–00 RES,FXD:THK FILM;332 OHM,1%,0.125W, TC=100 80009 321–5012–00 PPM;1206,T&R A3R162 321–5012–00...
  • Page 240 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A3R188 321–5020–00 RES,FXD:THK FILM;1.5K OHM,1%,0.125W, TC=100 80009 321–5020–00 PPM;1206,T&R A3R189 321–5012–00 RES,FXD:THK FILM;332 OHM,1%,0.125W, TC=100 80009 321–5012–00 PPM;1206,T&R A3R190 321–5012–00...
  • Page 241 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A3R220 321–5015–00 RES,FXD:THK FILM;562 OHM,1%,0.125W, TC=100 80009 321–5015–00 PPM;1206,T&R A3R221 321–5015–00 RES,FXD:THK FILM;562 OHM,1%,0.125W, TC=100 80009 321–5015–00 PPM;1206,T&R A3R224 321–5026–00...
  • Page 242 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A3R249 321–5006–00 671–2355–00 671–2355–06 RES,FXD:THK FILM;100 OHM,1%,0.125W, TC=100 80009 321–5006–00 PPM;1206,T&R A3R249 321–5014–00 671–2355–07 RES,FXD:THK FILM;475 OHM,1%,0.125W, TC=100 80009 321–5014–00...
  • Page 243 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A3R280 321–5113–00 RES,FXD:THK FILM;75 OHM,1%,0.125W, TC=100 80009 321–5113–00 PPM;1206,T&R A3R281 321–5011–00 RES,FXD:THK FILM;274 OHM,1%,0.125W, TC=100 80009 321–5011–00 PPM;1206,T&R A3R282 321–5266–00...
  • Page 244 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A3R310 321–5026–00 RES,FXD:THK FILM;4.75K OHM,1%,0.125W, TC=100 80009 321–5026–00 PPM;1206,T&R A3R311 321–5026–00 RES,FXD:THK FILM;4.75K OHM,1%,0.125W, TC=100 80009 321–5026–00 PPM;1206,T&R A3R312 321–5020–00...
  • Page 245 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A3R342 321–5090–00 RES,FXD,FILM:20K OHM,1%,0.125W 80009 321–5090–00 A3R343 321–5030–00 RES,FXD:THK FILM;10.0K OHM,1%,0.125W, TC=100 80009 321–5030–00 PPM;1206,T&R A3R344 321–5020–00 RES,FXD:THK FILM;1.5K OHM,1%,0.125W, TC=100 80009 321–5020–00...
  • Page 246 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A3R374 321–5006–00 RES,FXD:THK FILM;100 OHM,1%,0.125W, TC=100 80009 321–5006–00 PPM;1206,T&R A3R375 321–5006–00 RES,FXD:THK FILM;100 OHM,1%,0.125W, TC=100 80009 321–5006–00 PPM;1206,T&R A3R376 322–3130–00...
  • Page 247 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A3U19 156–5058–01 IC,DGTL:FTTL,BUS XCVR;OCTAL, NONINV, 80009 156–5058–01 3–STATE;74F245,SO20.300,24MM T&R A3U20 156–5441–01 IC,LIN: 80009 156–5441–01 A3U21 156–5190–01 IC,DGTL:FTTL,DEMUX/DCDR;1–OF–8 80009 156–5190–01...
  • Page 248 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A3U49 156–6059–01 IC,MISC:CMOS,ANALOG 80009 156–6059–01 SW;QUAD;DG444DY,SO16.150,16MM T&R A3U50 156–5073–01 671–2355–00 671–2978–00 IC,MISC:HCMOS,ANALOG MUX;TPL 80009 156–5073–01 SPDT;HC4053,SO16.150,16MM,T&R A3U50 156–5571–00 671–2978–01...
  • Page 249 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A3U81 156–6415–00 IC,LIN: 80009 156–6415–00 A3U82 156–5480–01 IC,DGTL: 80009 156–5480–01 A3U83 156–5692–00 IC,LIN: 80009 156–5692–00 A3U84 156–5138–01 IC,LIN:BIFET,OP–AMP;DUAL;MC34002/TL072,SO8.150, 80009 156–5138–01...
  • Page 250 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A4C14 290–1289–00 CAP,FXD,ALUM:47UF,20%,16V,0.250 X 0.276;RDL,NONPO- 80009 290–1289–00 LAR,BULK A4C15 283–5004–00 CAP,FXD,CER:MLC;0.1UF,10%,25V,X7R,1206;SMD,8MM 80009 283–5004–00 A4C16 283–5004–00 CAP,FXD,CER:MLC;0.1UF,10%,25V,X7R,1206;SMD,8MM 80009 283–5004–00 A4C17 283–5004–00...
  • Page 251 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A4C60 283–5004–00 672–1396–01 CAP,FXD,CER:MLC;0.1UF,10%,25V,X7R,1206;SMD,8MM 80009 283–5004–00 A4C61 281–0775–01 672–1396–00 672–1396–00 CAP,FXD,CER:MCL;0.1UF,20%,50V,Z5U,0.170 X 0.100;AX 04222 SA105E104MAA A4C61 283–5004–00 672–1396–01 CAP,FXD,CER:MLC;0.1UF,10%,25V,X7R,1206;SMD,8MM...
  • Page 252 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A4R1 321–5012–00 RES,FXD:THK FILM;332 OHM,1%,0.125W, TC=100 80009 321–5012–00 PPM;1206,T&R A4R2 321–5025–00 672–1396–00 672–1396–02 RES,FXD:THK FILM;3.92K OHM,1%,0.125W, TC=100 80009 321–5025–00...
  • Page 253 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A4R35 321–5049–00 RES,FXD:THK FILM;1M OHM,1%,0.125W, TC=100 80009 321–5049–00 PPM;1206,T&R A4R36 321–5018–00 RES,FXD:THK FILM;1.0K OHM,1%,0.125W, TC=100 80009 321–5018–00 PPM;1206,T&R A4R37 321–5018–00...
  • Page 254 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A4R68 321–5049–00 RES,FXD:THK FILM;1M OHM,1%,0.125W, TC=100 80009 321–5049–00 PPM;1206,T&R A4R69 321–5018–00 RES,FXD:THK FILM;1.0K OHM,1%,0.125W, TC=100 80009 321–5018–00 PPM;1206,T&R A4R70 321–5018–00...
  • Page 255 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A4R99 321–5000–00 672–1396–00 672–1396–02 RES,FXD:THK FILM;10 OHM,1%,0.125W, TC=100 57668 MCR18EZHFW10E PPM;1206,T&R A4R99 321–5042–00 672–1396–03 RES,FXD:THK FILM;39.2 OHM,1%,0.125W, TC=100 80009 321–5042–00...
  • Page 256 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A4U1 156–6059–01 IC,MISC:CMOS,ANALOG 80009 156–6059–01 SW;QUAD;DG444DY,SO16.150,16MM T&R A4U2 156–6407–00 IC,LIN: 80009 156–6407–00 A4U3 156–6407–00 IC,LIN: 80009 156–6407–00 A4U4 156–6407–00...
  • Page 257 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A4A1L9 108–0455–00 672–1396–00 672–1396–01 COIL,RF:FIXED,24NH,15% 80009 108–0455–00 671–2339–00 B010100 B010179 CIRCUIT BD ASSY:VECTORSCOPE 80009 671–2339–00 671–2339–01 B010180 B010478...
  • Page 258 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A5C52 283–5106–00 CAP,FXD,CER:MLC;470PF,5%,100V,NPO,1206;SMD,8MM 80009 283–5106–00 A5C53 283–5004–00 CAP,FXD,CER:MLC;0.1UF,10%,25V,X7R,1206;SMD,8MM 80009 283–5004–00 A5C54 283–5004–00 CAP,FXD,CER:MLC;0.1UF,10%,25V,X7R,1206;SMD,8MM 80009 283–5004–00 A5C55 283–5004–00 CAP,FXD,CER:MLC;0.1UF,10%,25V,X7R,1206;SMD,8MM 80009 283–5004–00...
  • Page 259 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A5C102 283–5001–00 CAP,FXD,CER:MLC;100PF,5%,50V,NPO,1206;SMD,8MM 80009 283–5001–00 A5C103 283–5004–00 CAP,FXD,CER:MLC;0.1UF,10%,25V,X7R,1206;SMD,8MM 80009 283–5004–00 A5C104 283–5187–00 CAP,FXD,CER:MLC;15PF,5%,100V,NPO,1206;SMD,8MM 04222 12061A150JAT1A A5C105 283–5004–00 CAP,FXD,CER:MLC;0.1UF,10%,25V,X7R,1206;SMD,8MM 80009 283–5004–00...
  • Page 260 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A5Q7 151–5002–00 XSTR,SIG:JFET,N–CH;5V,75MA,60 80009 151–5002–00 OHM,SW;MMBF4392L,SOT–23,8MM T&R A5Q8 151–5000–00 XSTR,SIG:BIPOLAR,PNP;40V,200MA,250MHZ, 04713 MMBT3906LT1 AMPL;MMBT3906L,TO–236/SOT–23,8MM T&R A5Q9 151–5001–00 XSTR,SIG:BIPOLAR,NPN;40V,200MA,300MHZ, 80009 151–5001–00...
  • Page 261 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A5R2 321–5018–00 RES,FXD:THK FILM;1.0K OHM,1%,0.125W, TC=100 80009 321–5018–00 PPM;1206,T&R A5R4 321–5022–00 RES,FXD:THK FILM;2.21K OHM,1%,0.125W, TC=100 80009 321–5022–00 PPM;1206,T&R A5R5 321–5025–00...
  • Page 262 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A5R33 321–5034–00 RES,FXD:THK FILM;22.1K OHM,1%,0.125W, TC=100 80009 321–5034–00 PPM;1206,T&R A5R34 321–5049–00 671–2339–00 671–2339–00 RES,FXD:THK FILM;1M OHM,1%,0.125W, TC=100 80009 321–5049–00...
  • Page 263 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A5R64 321–5038–00 RES,FXD:THK FILM;47.5K OHM,1%,0.125W, TC=100 80009 321–5038–00 PPM;1206,T&R A5R65 321–5036–00 RES,FXD:THK FILM;33.2K OHM,1%,0.125W, TC=100 80009 321–5036–00 PPM;1206,T&R A5R66 321–5030–00...
  • Page 264 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A5R95 321–5030–00 RES,FXD:THK FILM;10.0K OHM,1%,0.125W, TC=100 80009 321–5030–00 PPM;1206,T&R A5R96 321–5006–00 RES,FXD:THK FILM;100 OHM,1%,0.125W, TC=100 80009 321–5006–00 PPM;1206,T&R A5R97 321–5023–00...
  • Page 265 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A5R125 321–5090–00 RES,FXD,FILM:20K OHM,1%,0.125W 80009 321–5090–00 A5R126 321–5026–00 RES,FXD:THK FILM;4.75K OHM,1%,0.125W, TC=100 80009 321–5026–00 PPM;1206,T&R A5R127 321–5064–00 RES,FXD:THK FILM;200K OHM,1%,0.125W, TC=100 80009 321–5064–00...
  • Page 266 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A5R156 321–5026–00 RES,FXD:THK FILM;4.75K OHM,1%,0.125W, TC=100 80009 321–5026–00 PPM;1206,T&R A5R157 321–5015–00 RES,FXD:THK FILM;562 OHM,1%,0.125W, TC=100 80009 321–5015–00 PPM;1206,T&R A5R158 321–5015–00...
  • Page 267 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A5R187 321–5026–00 671–2339–00 671–2339–00 RES,FXD:THK FILM;4.75K OHM,1%,0.125W, TC=100 80009 321–5026–00 PPM;1206,T&R A5R187 321–5018–00 671–2339–01 RES,FXD:THK FILM;1.0K OHM,1%,0.125W, TC=100 80009 321–5018–00...
  • Page 268 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A5R217 321–5026–00 RES,FXD:THK FILM;4.75K OHM,1%,0.125W, TC=100 80009 321–5026–00 PPM;1206,T&R A5R218 321–5018–00 RES,FXD:THK FILM;1.0K OHM,1%,0.125W, TC=100 80009 321–5018–00 PPM;1206,T&R A5R219 321–5048–00...
  • Page 269 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A5U29 156–5269–01 671–2339–00 671–2339–03 IC,DGTL:ECL,RCVR,TPL LINE 80009 156–5269–01 RCVR,10H116,PLCC20,16MM A5U29 156–5361–00 671–2339–04 IC,DGTL:ECL,RCVR,TPL LINE RCVR,10116,PLCC20 80009 156–5361–00 A5U30 156–5136–00...
  • Page 270 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A6C36 283–0642–01 CAP,FXD,MICA DI:33PF,2%,500V 09023 CDA10ED330G03 A6C37 283–0633–01 CAP,FXD,MICA DI:77PF,1%,500V,RDL,T&A 09023 CDA15ED770F03 A6C38 283–0597–00 CAP,FXD,MICA DI:470PF,10%,300V 80009 283–0597–00 A6C39 281–0765–00...
  • Page 271 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A6CR4 152–1187–00 671–2472–02 DIO,SIG:VVC;30V,11PF AT 3V,2.1PF AT 25V, 80009 152–1187–00 C3/C25=5.2,Q=300,1R=50NA;KN3201,D0–34,T&R A6CR5 152–0141–02 DIO,SIG:ULTRA FAST;40V,150MA,4NS,2PF;1N4152,DO–35 80009 152–0141–02 A6CR6 152–0141–02...
  • Page 272 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A6Q22 151–0711–02 671–2472–02 XSTR,SIG:BIPOLAR,NPN;25V,50MA,650MHZ, 80009 151–0711–02 AMPL;MPSH10,TO–92 BEC,T&A A6Q26 151–1039–00 XSTR,SIG:JFET,P–CH;9V,16MA,2MS,GENER- 80009 151–1039–00 AL;2N5462,TO–92,SDG A6Q27 151–0188–00 XSTR,SIG:BIPOLAR,PNP;40V,200MA,250MHZ, 80009 151–0188–00...
  • Page 273 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A6R37 322–3226–00 RES,FXD:MET FILM;2.21K OHM,1%,0.2W, TC=100 57668 CRB20 FXE 2K21 PPM;AX,T&R,SM BODY A6R38 322–3289–00 RES,FXD:MET FILM;10K OHM,1%,0.2W, TC=100 80009 322–3289–00...
  • Page 274 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A6R85 322–3265–00 RES,FXD:MET FILM;5.62K OHM,1%,0.2W, TC=100 80009 322–3265–00 PPM;AX,T&R,SM BODY A6R87 322–3193–00 RES,FXD:MET FILM;1K OHM,1%,0.2W, TC=100 57668 CRB20 FXE 1K00 PPM;AX,T&R,SM BODY...
  • Page 275 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A6R131 322–3126–00 RES,FXD,FILM:200 OHM,1%,0.2W, TC=T0 80009 322–3126–00 A6R132 322–3126–00 RES,FXD,FILM:200 OHM,1%,0.2W, TC=T0 80009 322–3126–00 A6R133 322–3184–00 RES,FXD,FILM:806 OHM,1%,0.2W, TC=T0...
  • Page 276 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A6R177 322–3385–00 RES,FXD:MET FILM;100K OHM,1%,0.2W, TC=100 57668 CRB20 FXE 100K PPM;AX,T&R,SM BODY A6R178 322–3385–00 RES,FXD:MET FILM;100K OHM,1%,0.2W, TC=100...
  • Page 277 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A6U28 156–1225–00 IC,LIN:BIPOLAR,COMPTR;DUAL,OPEN 01295 LM393P COLL,300NS;LM393N,DIP08.3 A6U29 156–4135–00 IC,LIN:BIPOLAR,COMPTR;TTL 80009 156–4135–00 OUT,9NS,LATCH;MAX9686BCPA,DIP08.3 A6U30 156–4135–00 IC,LIN:BIPOLAR,COMPTR;TTL 80009 156–4135–00 OUT,9NS,LATCH;MAX9686BCPA,DIP08.3 A6U31 156–4135–00...
  • Page 278 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A7C118 281–0773–00 CAP,FXD,CER:MLC;0.01UF,10%,100V,SAF,0.100 X 0.170;AX 80009 281–0773–00 A7C119 281–0773–00 CAP,FXD,CER:MLC;0.01UF,10%,100V,SAF,0.100 X 0.170;AX 80009 281–0773–00 A7C120 281–0775–01 CAP,FXD,CER:MCL;0.1UF,20%,50V,Z5U,0.170 X 0.100;AX...
  • Page 279 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A7J13 131–3181–00 CONN,HDR: 80009 131–3181–00 A7J81 131–3378–00 CONN,RF JACK: 00779 227677–1 A7J82 131–3378–00 CONN,RF JACK: 00779 227677–1 A7J83 131–3378–00...
  • Page 280 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A7Q136 151–0190–00 XSTR,SIG:BIPOLAR,NPN;40V,200MA,300MHZ, 80009 151–0190–00 AMPL;2N3904,TO–92 EBC A7Q143 151–0711–02 XSTR,SIG:BIPOLAR,NPN;25V,50MA,650MHZ, 80009 151–0711–02 AMPL;MPSH10,TO–92 BEC,T&A A7Q151 151–0190–00 XSTR,SIG:BIPOLAR,NPN;40V,200MA,300MHZ, 80009 151–0190–00...
  • Page 281 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A7R36 322–3097–00 RES,FXD:MET FILM;100 OHM,1%,0.2W, TC=100 57668 CRB20 FXE 100E PPM;AX,T&R,SM BODY A7R40 321–0317–00 RES,FXD,FILM:19.6K OHM,1%,0.125W, TC=T0 07716...
  • Page 282 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A7R90 322–3193–07 RES,FXD,FILM:1K OHM,0.1%,0.2W, TC=T9 80009 322–3193–07 A7R91 322–3193–07 RES,FXD,FILM:1K OHM,0.1%,0.2W, TC=T9 80009 322–3193–07 A7R92 322–3222–00 RES,FXD:MET FILM;2K OHM,1%,0.2W, TC=100...
  • Page 283 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A7R137 322–3210–00 RES,FXD:MET FILM;1.5K OHM,1%,0.2W, TC=100 57668 CRB20 FXE 1K50 PPM;AX,T&R,SM BODY A7R140 322–3354–00 RES,FXD:MET FILM;47.5K OHM,1%,0.2W, TC=100 80009 322–3354–00...
  • Page 284 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A7R206 322–3289–00 RES,FXD:MET FILM;10K OHM,1%,0.2W, TC=100 80009 322–3289–00 PPM;AX,T&R,SM BODY A7R207 322–3277–00 RES,FXD,FILM:7.5K OHM,1%,0.2W, TC=T0 57668 CRB20 FXE 7K50 A7R208 322–3289–00...
  • Page 285 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A7U125 156–2463–00 IC,DGTL:HCMOS,GATE;QUAD 2–IN OR;74HC32,DIP14.3 18324 74HC32N A7U126 156–1688–00 IC,LIN:BIFET,OP–AMP;DUAL,LOW OFFSET,LOW 80009 156–1688–00 DRIFT;LF412ACN,DIP08.3 A7U151 156–3972–00 IC,MISC:CMOS,ANALOG SW;QUAD SPST,100 80009 156–3972–00...
  • Page 286 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number A8C7 283–5098–00 CAP,FXD,CER:MLC;0.1UF,+80%–20%,50V,Z5U,1206;SMD,8 04222 12065E104ZAT3A MM T&R A8C8 283–5098–00 CAP,FXD,CER:MLC;0.1UF,+80%–20%,50V,Z5U,1206;SMD,8 04222 12065E104ZAT3A MM T&R A8J1 131–3181–00 CONN,HDR: 80009 131–3181–00...
  • Page 287 Replaceable Electrical Parts Component Tektronix Serial / Assembly Number Mfr. Mfr. Part Number Part Number Effective Discontinued Name & Description Code Number (CONNECTED @ A3J5 & A7J12,1760–SER ONLY) 174–2746–00 CA ASSY,SP,ELEC:2 X 20,28 AWG,5.5 L,RBN 80009 174–2746–00 (CONNECTED @ A3J2 & A7J13,1760–SER ONLY) 8–78...
  • Page 288 Replaceable Electrical Parts 8–79 1740A/1750A/1760–Series Service Manual REV JUL 1994 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 289 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 290 Example: ID CONTROL, (ID CONTROL), or /ID CONTROL. Abbreviations are based on ANSI Y1.1–1972. Other ANSI standards that are used in the preparation of diagrams by Tektronix, Inc. are: Y14.15, 1966 — Drafting Practices. Y14.2, 1973 — Line Conventions and Lettering.
  • Page 291 Diagrams/Circuit Board Illustrations The following information and special symbols may appear in this manual. Assembly Numbers Each assembly in the instrument is assigned an assembly number (e.g., A20). The assembly number appears on the diagram (in circuit board outline), circuit board illustration title, and lookup table for the schematic diagram.
  • Page 292 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 293 1740A/1750A/1760–Series. Use this list to identify and order replacement parts. There is a separate Replaceable Mechanical Parts list for each instrument. Parts Ordering Information Replacement parts are available from or through your local Tektronix, Inc., Field Office or representative. Changes to Tektronix instruments are sometimes made to accommodate improved components as they become available and to give you the benefit of the latest circuit improvements.
  • Page 294 Figure & Index No. Items in this section are referenced by figure and index numbers to the illustra- (Column 1) tions. Tektronix Part No. Indicates part number to be used when ordering replacement part from (Column 2) Tektronix. Serial No.
  • Page 295 SUB TRACOR INC 78189 ILLINOIS TOOL WORKS INC ST CHARLES ROAD ELGIN IL 60120 SHAKEPROOF DIV 80009 TEKTRONIX INC 14150 SW KARL BRAUN DR BEAVERTON OR 97077–0001 PO BOX 500 80126 PACIFIC ELECTRICORD CO 747 W REDONDO BEACH GARDENA CA 90247–4203...
  • Page 296 Replaceable Mechanical Parts Fig. & Index Tektronix Serial Number Mfr. Part No. Effective Dscont Qty 12345 Name & Description Code Mfr. Part No. 1–1 333–4024–00 PANEL,FRONT:1740A 80009 333–4024–00 (1740A ONLY) 333–4017–00 PANEL,FRONT:1741A 80009 333–4017–00 (1741A ONLY) 333–4018–00 PANEL,FRONT:1745A 80009 333–4018–00 (1745A ONLY) 333–4019–00...
  • Page 297 Replaceable Mechanical Parts Fig. & Index Tektronix Serial Number Mfr. Part No. Effective Dscont 12345 Name & Description Code Mfr. Part No. *END MOUNTING PARTS* –26 131–3573–00 CONN,PLUG,ELEC:MALE,W/LOCKING ADAPTER 80126 B–0779 –27 337–3841–00 SHIELD,ELEC:PLASTIC,POWER SUPPLY 80009 337–3841–00 –28 333–4022–00 PANEL,REAR:1740A/1750A 80009 333–4022–00...
  • Page 298 Replaceable Mechanical Parts Fig. & Index Tektronix Serial Number Mfr. Part No. Effective Dscont 12345 Name & Description Code Mfr. Part No. (1750A–SERIES/1760–SERIES OPT SC ONLY) *END MOUNTING PARTS* –57 337–3839–00 B010100 B012374 SHIELD,ELEC:PLASTIC,VECTOR 80009 337–3839–00 337–3839–01 B012375 SHIELD,ELEC:PLASTIC,VECTOR 80009 337–3839–01...
  • Page 299 Replaceable Mechanical Parts Fig. & Index Tektronix Serial Number Mfr. Part No. Effective Dscont 12345 Name & Description Code Mfr. Part No. ––––– ––––– PTD CASE ASSY:1700F02 ––––– ––––– RACK ADAPTER,SIDE–BY–SIDE:1700F05 ––––– ––––– FILLER PANEL:1700F06 ––––– ––––– DRAWER,UTILITY:1700F07 10–7 1740A/1750A/1760–Series Service Manual REV JUL 1994 Artisan Technology Group - Quality Instrumentation ...
  • Page 300 Replaceable Mechanical Parts 10–8 1740A/1750A/1760–Series Service Manual REV JUL 1994 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 301: Glossary

    Glossary AC Coupled A connection which removes the constant voltage (DC compo- nent) on which the signal (AC component) is riding. Usually implemented by passing the signal through a capacitor. APL (Average Picture Level.) The average signal level (with respect to blanking) during active picture time, expressed as a percentage of the difference between the blanking and reference white levels.
  • Page 302 Glossary Bruch Blanking (PAL) A 4-field burst blanking sequence employed in PAL signals to ensure that burst phase is the same at the end of each vertical interval. Burst (NTSC) A small reference packet of the subcarrier sine wave, typically 8 or 9 cycles, which is sent on every line of video.
  • Page 303 In television it may refer to: (1) An instrument, such as a TEKTRONIX 1450, which takes video in its transmitted form (modulated onto the picture carrier) and converts it to baseband.
  • Page 304 Glossary Gamma (NTSC) Since picture monitors have a nonlinear relationship between the input voltage and brightness, the signal must be correspondingly predis- torted. Gamma correction is always done at the source (camera) in television systems: the R, G, and B signals are converted to R , and B .
  • Page 305 Glossary Lightning Lightning display. A display, for use with SMPTE specified color difference signal (Y, P ), that plots the two color difference signals against luminance to create a display similar in appearance to a lightning bolt. Linear Distortion Refers to distortions which are independent of signal amplitude.
  • Page 306 Glossary RGB Red, Green, and Blue. Also referred to as GBR. The three primary colors used in color television’s additive color reproduction system. These are the three color signals generated by the camera and used by the picture monitor to produce a picture.
  • Page 307 Glossary Unmodulated When used to describe television test signals, this term refers to pulses and pedestals which do not have high-frequency chrominance information added to them. V The R–Y signal after a weighting factor of 0.877 has been applied. The weighting is necessary to reduce peak modulation in the composite signal.
  • Page 308 Glossary 1740A/1750A/1760 – Series Service Manual Glossary–8 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 309 Index 1740A/1750A/1760 – Series Service Manual Index–1 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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  • Page 368 Artisan Technology Group is your source for quality new and certified-used/pre-owned equipment SERVICE CENTER REPAIRS WE BUY USED EQUIPMENT • FAST SHIPPING AND DELIVERY Experienced engineers and technicians on staff Sell your excess, underutilized, and idle used equipment at our full-service, in-house repair center We also offer credit for buy-backs and trade-ins •...

This manual is also suitable for:

1750a series1760 series

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