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TM 11-6625-2922-14&P




TECHNICAL MANUAL




OPERATOR'S, ORGANIZATIONAL, DIRECT SUPPORT,
AND GENERAL SUPPORT MAINTENANCE MANUAL
INCLUDING REPAIR PARTS AND SPECIAL TOOLS LISTS
FOR
OSCILLOSCOPE, TEKTRONIX MODEL R7704
(NSN 6625-00-007-8487)




HEADQUARTERS, DEPARTMENT OF THE ARMY
8 SEPTEMBER 1980
WARNING
DANGEROUS VOLTAGES EXIST IN
THIS EQUIPMENT

Dangerous potentials exist at several points throughout this equipment. When the equipment is
operated with the covers removed, DO NOT touch exposed connections or components. Some
transistors have voltages present on their cases. Disconnect power before cleaning the
equipment or replacing parts.

DON'T TAKE CHANCES!
Copyright 1970 by Tektronix Inc. All rights reserved. Reproduced by permission of the copyright owner, TEKTRONIX
INC.

TM 11-6625-2922-14&P



}
TECHNICAL MANUAL HEADQUARTERS
DEPARTMENT OF THE ARMY
No. 11-6625-2922-14&P WASHINGTON, DC, 8 September 1980

OPERATOR'S, ORGANIZATIONAL, DIRECT SUPPORT, AND
GENERAL SUPPORT MAINTENANCE MANUAL
(INCLUDING REPAIR PARTS AND SPECIAL TOOLS LISTS)
FOR
OSCILLOSCOPE, TEKTRONIX MODEL R7704
(NSN 6625-00-007-8487)


REPORTING ERRORS AND RECOMMENDING IMPROVEMENTS
You can help improve this manual. If you find any mistakes or if you know of a way to
improve the procedures, please let us know. Mail your letter, DA Form 2028 (Recommended
Changes to Publications and Blank Forms), or DA Form 2028-2 located in back of this manual
direct to: Commander, US Army Communications and Electronics Materiel Readiness Command,
ATTN: DRSEL-ME-MQ, Fort Monmouth, NJ 07703.
In either case, a reply will be furnished direct to you.


Table of Contents
Paragraph Page

SECTION 0. INTRODUCTION
Scope .................................................................................................................... 0-1 0-1
Indexes of Publications.......................................................................................... 0-2 0-1
Maintenance Forms, Records, and Reports.......................................................... 0-3 0-1
Reporting Equipment Improvement Recommendations (EIR) .............................. 0-4 0-1
Administrative Storage .......................................................................................... 0-5 0-1
Destruction of Army Electronics Materiel............................................................... 0-6 0-1




This manual is an authentication of the manufacturer's commercial literature which, through usage, has been found to
cover the data required to operate and maintain this equipment. Since the manual was not prepared in accordance with
military specifications, the format has not been structured to consider levels of maintenance.


0.1
R7704
TABLE OF CONTENTS


SECTION 1. R7704 SPECIFICATION Page Page

Introduction 1-1 First-Time Operation
Table 1-1 Electrical General 2-7
Vertical Deflection System 1-1 Setup Information 2-7
Triggering 1-2 Calibration Check 2-8
Horizontal Deflection System 1-2 Vertical and Horizontal Mode 2-8
Calibrator 1-2 Triggering 2-9
External Z-Axis Input 1-2 Control Illumination 2-10
Signal Outputs 1-3 Readout 2-10
Character Generator 1-4 Beam Finder 2-10
Power Supply 1-4 Z-Axis Input 2-10
Display 1-4 Test Set-Up Chart
Table 1-2 Environmental Characteristics 1-4 General 2-10
Table 1-3 Physical Characteristics 1-5 General Operating Information
Standard Accessories 1-5 Simplified Operating Instructions 2-10
Instrument Options Intensity Controls 2-16
General 1-5 Display Focus 2-16
Option 1 1-5 Trace Alignment Adjustment 2-17
Option 2 1-5 Graticule 2-17
Option 3 1-5 Light Filter 2-17
System Specifications Beam Finder 2-17
Control Illumination 2-17
Readout 2-18
Remote Readout 2-19
SECTION 2 OPERATING INSTRUCTIONS Display Photography 2-19
General 2-1 Vertical and Horizontal Mode Switch
Preliminary Information Logic 2-19
Operating Voltage 2-1 Vertical Mode 2-20
Operating Temperature 2-2 Horizontal Mode 2-21
Rackmounting 2-2 Vertical Trace Separation 2-22
Display Definitions 2-2 Trigger Source 2-22
Plug-In Units X-Y Operation 2-22
General 2-3 Intensity Modulation 2-23
Plug-In Installation 2-3 Raster Display 2-24
Controls and Connectors Calibrator 2-24
General 2-3 Signal Outputs 2-24
Display Controls 2-5 Probe Power Connectors 2-25
Mode Selectors 2-5 Remote Connector 2-25
Output Connectors 2-6 Remote Single-Sweep Reset 2-25
Input Connectors 2-7 Applications 2-26

i
R7704

CONTENTS (Cont)

SECTION 3 CIRCUIT DESCRIPTION Page Page

Introduction 3-1 Lubrication 4-3
Block Diagram Visual Inspection 4-3
General 3-1 Semiconductor Checks 4-3
Circuit Operation Recalibration 4-3
General 3-3 Troubleshooting
Logic Fundamentals Introduction 4-3
General 3-3 Troubleshooting Aids 4-3
Symbols 3-3 Troubleshooting Equipment 4-4
Logic Polarity 3-3 Troubleshooting Techniques 4-7
Input/Output Tables 3-4 Special Troubleshooting Information 4-9
Non-Digital Devices 3-4 Corrective Maintenance
Main Interface General 4-18
General 3-7 Obtaining Replacement Parts 4-18
Logic Circuit Soldering Techniques 4-18
General 3-7 Component Replacement 4-19
Horizontal Logic 3-7 Recalibration After Repair 4-25
Z-Axis Logic 3-13 Instrument Repackaging 4-25
Horizontal Binary 3-14
Vertical Binary 3-16

SECTION 5 PERFORMANCE CHECK/CALIBRATION

Plug-In Binary 3-18
1 Clock Generator 3-20 Introduction 5-1
Vertical Chopped Blanking 3-21 Test Equipment Required
Chop Counter 3-24 General 5-1
Vertical Mode Logic 3-26 Test Equipment 5-1
Trigger Selector 3-27 Accessories 5-2
Vertical Interface 3-30 Adjustment Tools 5-2
Vertical Amplifier 3-33 Short-Form Procedure and Index 5-3
Horizontal Interface 3-35 Performance Check/Calibration Procedure
Horizontal Amplifier 3-36 General 5-5
Output Signals 3-38 Preliminary Procedure for Performance
CRT Circuit 3-41 Check Only 5-6
Line to DC Converter/Regulator 3-45 Preliminary Procedure for Complete
Low-Voltage Regulator 3-49 Calibration 5-6
Controls and Cabling 3-53 Preliminary Control Settings 5-6
Readout System Calibration Steps 5-7
Introduction to Readout System 3-54
Circuit Analysis of Readout System 3-60

SECTION 6 RACKMOUNTING

SECTION 4 MAINTENANCE Introduction 6-1

Introduction 4-1 Instrument Dimensions 6-1
Cover Removal 4-1 Rack Dimensions 6-1
Power-Unit Removal 4-1 Slide-Out Tracks 6-1
Preventive Maintenance Mounting Procedure 6-1
General 4-1 Removing or Installing the Instrument 6-5
Cleaning 4-2 Slide-Out Track Lubrication 6-5

ii
R7704

CONTENTS (Cont)

SECTION 7 ELECTRICAL PARTS LIST Page SECTION 9 MECHANICAL PARTS LIST
Abbreviations and Symbols Mechanical Parts List Information
Parts Ordering Information Index of Mechanical Parts List and
Index of Electrical Parts List Illustrations
Electrical Parts List Mechanical Parts List
Part Number-National Stock Number
Cross Reference Index

SECTION 8 DIAGRAMS AND CIRCUIT BOARD CHANGE INFORMATION
ILLUSTRATIONS Abbreviations and symbols used in this manual are
based on or taken directly from IEEE Standard 260
Symbols and Reference Designators 8-1 "Standard Symbols for Units", MIL-STD-12B and
Voltage and Waveform Test Conditions 8-2 other standards of the electronics industry.
Diagrams Change Information, if any, is located at the rear of
Circuit Board Illustrations this manual.

iii
Page

APPENDIX A. REFERENCES...................................................................................................................... A-1
APPENDIX B. COMPONENTS OF END ITEM LIST (Not applicable)
APPENDIX C. ADDITIONAL AUTHORIZATION LIST (Not applicable)
APPENDIX D. MAINTENANCE ALLOCATION
Section I. Introduction............................................................................................................................ D-1
II. Maintenance Allocation Chart for Oscilloscope, Tektronix Model R7704 ............................. D-3
III. Tool and Test Equipment Requirements for Oscilloscope, Tektronix Model R7704 ............ D-4
IV. Remarks ................................................................................................................................ D-5
APPENDIX E. REPAIR PARTS AND SPECIAL TOOLS LIST (See Section 7, Electrical Parts List)
APPENDIX F. EXPENDABLE SUPPLIES AND MATERIALS LIST (Not applicable)

iv
SECTION 0
INTRODUCTION

0-1. Scope
c. Discrepancy in Shipment Report (DISREP) (SF
This manual contains instructions for the operation and 361). Fill out and forward Discrepancy in Shipment
organizational, direct support, and general support Report (DISREP) (SF 361) as prescribed in AR 55-
maintenance of Oscilloscope, Tektronix Model R7704. 38/NAVSUPINST 4610.33B/AFR 75-18/MCO P4610.19C
Throughout this manual, Oscilloscope, Tektronix Model and DLAR 4500.15.
R7704 is referred to as the R7704.
0-4. Reporting Equipment Improvement
0-2. Indexes of Publications Recommendations (EIR)

a. DA Pam 310-4. Refer to the latest issue of DA If your R7704 needs improvement, let us know. Send us
Pam 310-4 to determine whether there are new editions, an EIR. You, the user, are the only one who can tell us
changes, or additional publications pertaining to the what you don't like about your equipment. Let us know
equipment. why you don't like the design. Tell us why a procedure is
hard to perform. Put it on an SF 368 (Quality Deficiency
b. DA Pam 310-7. Refer to DA Pam 310-7 to Report). Mail it to Commander, US Army
determine whether there are modification work orders Communications and Electronics Materiel Readiness
(MWO's) pertaining to the equipment. Command, ATT'N: DRSEL-ME-MQ, Fort Monmouth, NJ
07703. We'll send you a reply.
0-3. Maintenance Forms, Records, and Reports
0-5. Administrative Storage
a. Reports of Maintenance and Unsatisfactory
Equipment. Department of the Army forms and To prepare the R7704 for administrative storage,
procedures used for equipment maintenance will be perform the procedures described in Section 4,
those prescribed by TM 38-750, The Army Maintenance Maintenance, and Section 5, Performance
Management System. Check/Calibration. Upon removal from administrative
storage, perform the procedures described in Section 5,
b. Report of Packaging and Handling Deficiencies. Performance Check/Calibration, to determine that the
Fill out and forward DD Form 6 (Packaging Improvement equipment is fully operational.
Report) as prescribed in AR 735-11/NAVINST
4440.127E/AFR 400-54/MCO 4430.3E and DSAR 0-6. Destruction of Army Electronics Materiel
4140.55.
Destruction of Army electronics materiel to prevent
enemy use shall be in accordance with TM 750-244-2.


0-1
Fig. 1-1. The R7704 Oscilloscope.
Fig. 1-1. The R7704 Oscilloscope

R7704 (A)
R7704

SECTION 1
R7704 SPECIFICATION

Change information, if any, affecting this section will be found at the rear of the manual.

Introduction The R7704 features a CRT with small spot size
and high writing speed. Graticule area is 8 X 10
The Tektronix R7704 Oscilloscope is a solid- centimeters. In addition, the instrument contains a
state, high performance instrument designed for readout system to provide CRT display of alpha-numeric
mounting in a 19-inch rack (complete rackmounting information from the plug-in units; data such as
information is given in Section 6). This instrument deflection factor, sweep rate, etc. can be encoded.
accepts Tektronix 7-series plug-in units to form a
complete measurement system. The flexibility of this This instrument will meet the electrical
plug-in feature and the variety of plug-in units available characteristics listed in Table 1-1 following complete
allow the system to be used for many measurement calibration as given in Section 5. The performance
applications. check procedure included in Section 5 provides a
convenient method of checking instrument performance
The R7704 has four plug-in compartments. The without making internal checks or adjustments. The
left pair of plug-ins is connected to the vertical deflection following electrical characteristics apply over a calibration
system. The right pair is connected to the horizontal interval of 1000 hours and an ambient temperature range
deflection system. Electronic switching between the of 0