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Service Manual
1780R-Series
Video Measurement Set
SN B030000 & Up
070-8030-01
This document supports firmware version 1.16
and above.
Warning
The servicing instructions are for use by qualified
personnel only. To avoid personal injury, do not
perform any servicing unless you are qualified to
do so. Refer to all safety summaries prior to
performing service.
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Copyright Tektronix, Inc. All rights reserved. Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes that in all previously published material. Specifications and price change privileges reserved. Printed in the U.S.A. Tektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070–1000 TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
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Service Assurance If you have not already purchased Service Assurance for this product, you may do so at any time during the product’s warranty period. Service Assurance provides Repair Protection and Calibration Services to meet your needs. Repair Protection extends priority repair services beyond the product’s warranty period; you may purchase up to three years of Repair Protection. Calibration Services provide annual calibration of your product, standards compliance and required audit documen
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WARRANTY Tektronix warrants that the products that it manufactures and sells will be free from defects in materials and workmanship for a period of three (3) years from the date of shipment. If a product proves defective during this warranty period, Tektronix, at its option, either will repair the defective product without charge for parts and labor, or will provide a replacement in exchange for the defective product. In order to obtain service under this warranty, Customer must notify Tektronix
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Table of Contents General Safety Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi Service Safety Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv Specifications Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–1 CRT Options . . . . . . . . . . . . . . . . .
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Table of Contents Operating Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–27 Front-panel Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–28 Functional Measurement Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–31 Theory of Operation Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–1 Schematic Dia
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Table of Contents Adjustment Procedures General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–1 Recommended Equipment List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–4 Adjustment List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–8 Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Table of Contents Options CRT Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–1 Power Cord Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–1 Electrical Parts List Diagrams Mechanical Parts List iv 1780R-Series Service Manual
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Table of Contents List of Figures Figure 1–1: Simplified representation of the 1780R-Series Video Measurement Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–1 Figure 2–1: Rear panel for the Tektronix 1780R-Series Measurement Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–3 Figure 2–2: Settings for the rear-panel mains selector switch . . . . . . 2–5 Figure 2–3: Upper right portion of the 1780R-Series rear panel, showing the loc
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Table of Contents Figure 4–1: 5% signal Attenuator for checking differential gain . . . . 4–4 Figure 4–2: Rear view of the X Y plug connections. (Pins 2, 4, 6, 10, 12, and 14 can be used to make ground connections.) . . . . . . . 4–5 Figure 4–3: REMOTE connector modified for Remote Sync input . . 4–5 Figure 4–4: RGB Parade Display Test Connector . . . . . . . . . . . . . . . . 4–6 Figure 4–5: Initial equipment hook-up for the Performance Check Procedure . . . . . . . . . . . . . . . . . . . .
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Table of Contents Figure 5–11: Adjustment locations on the Vectorscope circuit board (Assembly A6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–21 Figure 5–12: Connections for adjusting the calibrator amplitude . . . 5–22 Figure 5–13: Input & BNC circuit board (A8) adjustments, shown as they would appear with the instrument on its left side . . . . . . . . . 5–25 Figure 5–14: Test equipment connections for matching CH A and CH B1 input gains. . . . . .
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Table of Contents List of Tables Table 1–1: Input/Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–4 Table 1–2: Waveform Monitor Vertical System . . . . . . . . . . . . . . . . . 1–5 Table 1–3: Waveform Monitor Probe Input . . . . . . . . . . . . . . . . . . . . 1–8 Table 1–4: Waveform Monitor Horizontal Deflection System . . . . . . 1–8 Table 1–5: Waveform Monitor dG and dP Display . . . . . . . . . . . . . . . 1–11 Table 1–6: Synchronization . . . . . . . . . .
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Table of Contents Table 5–1: Recommended Equipment . . . . . . . . . . . . . . . . . . . . . . . . . 5–4 Table 5–2: 1780R-Series Adjustments for Calibration Procedure . . 5–8 Table 5–3: 1780R-Series Initial Control Settings . . . . . . . . . . . . . . . . . 5–12 Table 5–4: Low Voltage Power Supply Tolerance . . . . . . . . . . . . . . . . 5–14 Table 6–1: Static Susceptibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–3 Table 6–2: Test Selectable Components . . . . . . . . .
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Table of Contents x 1780R-Series Service Manual
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General Safety Summary Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. To avoid potential hazards, use this product only as specified. Only qualified personnel should perform service procedures. To Avoid Fire or Use Proper Power Cord. Use only the power cord specified for this product and certified for the country of use. Personal Injury Connect and Disconnect Properly. Do not connect or disconnect probes or test leads
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General Safety Summary Symbols and Terms Terms in this Manual. These terms may appear in this manual: WARNING. Warning statements identify conditions or practices that could result in injury or loss of life. CAUTION. Caution statements identify conditions or practices that could result in damage to this product or other property. Terms on the Product. These terms may appear on the product: DANGER indicates an injury hazard immediately accessible as you read the marking. WARNING indicates an inju
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Service Safety Summary Only qualified personnel should perform service procedures. Read this Service Safety Summary and the General Safety Summary before performing any service procedures. Do Not Service Alone. Do not perform internal service or adjustments of this product unless another person capable of rendering first aid and resuscitation is present. Disconnect Power. To avoid electric shock, disconnect the mains power by means of the power cord or, if provided, the power switch. Use Caution
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Service Safety Summary xiv 1780R-Series Service Manual
