TECHNICAL MANUAL ORGANIZATIONAL MAINTENANCE MANUAL MAGNETIC TAPE UNIT EXPANDED TROUBLESHOOTING (LOGIC DIAGRAM THEORY)

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1 TECHNICAL MANUAL ORGANIZATIONAL MAINTENANCE MANUAL MAGNETIC TAPE UNIT EXPANDED TROUBLESHOOTING (LOGIC DIAGRAM THEORY) GUIDED MISSILE AIR DEFENSE SYSTEM AN/TSQ-73 DEPARTMENT OF THE ARMY 5 JUNE 1984

2 TECHNICAL MANUAL ) HEADQUARTERS ) DEPARTMENT OF THE ARMY No ) Washington, D.C., 5 June 1984 ORGANIZATIONAL MAINTENANCE MANUAL: MAGNETIC TAPE UNIT EXPANDED TROUBLESHOOTING (LOGIC DIAGRAM THEORY) GUIDED MISSILE AIR DEFENSE SYSTEM AN/TSQ-73 REPORTING OF ERRORS You can help improve this publication. 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 located in back of this manual direct to: Commander, U.S. Army Missile Command, ATTN: DRSMI-SNPM, Redstone Arsenal, AL A reply will be furnished to you. TABLE OF CONTENTS Chapter LIST OF ILLUSTRATIONS... LIST OF TABLES... Page iii v 5 MAGNETIC TEST SET EXPANDED TROUBLESHOOTING Section I. INTRODUCTION 5-1. Scope Expanded Troubleshooting Concept Troubleshooting Aids Physical Description Circuit Card Location Index Tables and Key Signal Lookup Tables Section II. OVERALL THEORY OF OPERATION 5-6. Overall Functional Description Section III. DETAILED DESCRIPTION 5-7. General Two-Phase Clock Generator Main Timing Counter Input/Output Interface Input/Output Data Buffer Read, Status, or Interrupt Output Logic I/O Strobe and Request Counters State and Byte Counters Address, Command, and Enable Logic MTU Commands Logic Start/Stop Control Logic i

3 TABLE OF CONTENTS - Continued Chapter Page Write Timing Counter Write Data Control Logic Read Data Logic Read Control Logic Byte Timing Logic Record Gap Detect Logic End of Block (EOB) Counter Error Detect Logic Beginning of Tape/End of Tape (BOT/EOT) Detect Logic Test Command Generator MTT Control Logic MTT Write Function Logic MTT Read Function Logic MTT Tape Drive Electronics Section IV. WIRING HARNESSES AND POWER DISTRIBUTION W2 Harness and Front Panel Wiring Diagram MTT Wiring Diagram W1, W3, and MTS Interface Wiring Diagram Power Distribution ii

4 LIST OF ILLUSTRATIONS Figure Title Page 5-1. MTU Major Subassemblies MTU Component Location MTU Cabling Diagram MTU Overall Block Diagram MTU Functional Block Diagram Two-Phase Clock Generator Block Diagram Main Timing Counter Block Diagram Main Timing Counter Timing Diagram Input/Output Interface Block Diagram Input/Output Data Buffer Block Diagram Read, Status, or Interrupt Output Logic Block Diagram I/O Strobe and Request Counters Block Diagram Request Counter Timing Diagram I/O Strobe Counter Timing Diagram State and Byte Counters Block Diagram State and Byte Counters Timing Diagram Address, Command, and Enable Logic Block Diagram I/O Data SYNC Flip-Flops Timing Diagram MTU Commands Logic Block Diagram Start/Stop Control Logic Block Diagram Look Ahead Delay Counter Timing Diagram DEV CMD SYNC Counter Timing Diagram Start Delay Counter Timing Diagram Stop Delay Counter Reset Timing Diagram Stop Delay Counter Timing Diagram Flying Start Delay Counter Timing Diagram Write Timing Counter Block Diagram Write Timing Counter Timing Diagram Write Data/Control Block Diagram Write/Erase Delay (65/80-ps) Timing Diagram Write Counter Timing Diagram Write Request Delay Counter Timing Diagram LRC Counter Timing Diagram Read Data Logic Block Diagram Read Control Logic Block Diagram Read Request Timing Diagram Read Byte Timing Logic Block Diagram Read Byte Counter Timing Diagram Record Gap Detect Logic Block Diagram Record Gap Detect Timing Diagram High Speed Gap Detect Timing Diagram EOB Counter Block Diagram EOB Counter Timing Diagram Error Detect Logic Block Diagram Longitudinal Redundancy Check Logic Block Diagram BOT/EOT Detect Logic Block Diagram BOT/EOT SYNC Counters Timing Diagram Test Command Generator Block Diagram Test Commands Timing Diagram MTT Control Logic Block Diagram MTT Write Function Block Diagram MTT Read Function Block Diagram MTT Tape Drive Electronics Block Diagram Power Distribution Block Diagram iii

5 LIST OF ILLUSTRATIONS - Continued Figure Title Page FO-1. Two-Phase Clock Generator Logic Diagram... FO-2. Main Timing Counter Logic Diagram... FO-3. Input/Output Interface Logic Diagram... FO-4. Input/Output Data Buffer Logic Diagram... FO-5. Read, Status, or Interrupt Output Logic Diagram... FO-6. I/O Strobe and Request Counter Logic Diagram... FO-7. State and Byte Counters Logic Diagram... FO-8. Address, Command, and Enable Logic Diagram... FO-9. MTU Commands Logic Diagram... FO-10. Start/Stop Control Logic Diagram... FO-11. Write Timing Counter Logic Diagram... FO-12. Write Data/Control Logic Diagram... FO-13. Read Data Logic Diagram... FO-14. Read Control Logic Diagram... FO-15. Read Byte Timing Logic Diagram... FO-16. Record Gap Detect Logic Diagram... FO-17. End of Block Counter Logic Diagram... FO-18. Error Detect Logic Diagram... FO-19. BOT/ELT Detect Logic Diagram... FO-20. Test Command Generator Logic Diagram... FO-21. MTT Control Logic Diagram... FO-22. MTT Write Function Logic Diagram... FO-23. MTT Read Function Logic Diagram... FO-24. MTT Tape Drive Electronics Signal Flow Diagram... FO-25. W2 Harness and Front Panel Wiring Diagram... FO-26. MTT Wiring Diagram... FO-27. WI, W3, and Module Test Set (MTS) Interface Wiring Diagram... FO-28. MTU Power Distribution Diagram... FO-29. MTT Power Distribution Diagram... iv

6 LIST OF TABLES Table Title Page 5-1. Card Location in Logic Diagrams Index Key Signal Lookup Listing Timing Decoder Truth Table IRG Interrupt Decoder Truth Table I/O Parity Truth Table Set Error Register Inputs and Outputs Generated Byte Encoder Truth Table v / (vi blank)

7 CHAPTER 5 MAGNETIC TAPE UNIT EXPANDED TROUBLESHOOTING Section I. INTRODUCTION 5-1. Scope. The expanded troubleshooting part of TM of the Recorder-Reproducer RD- 449/TSQ-73(V), hereinafter referred to as the magnetic tape unit (MTU), Equipment Maintenance for Guided Missile Air Defense System AN/ TSQ-73 is contained in volumes 2 and 3. It provides supplemental information for the use and guidance of advanced personnel responsible for repair of the MTU beyond the scope of organizational maintenance covered in the basic TM series of technical manuals Expanded Troubleshooting Concept. Expanded troubleshooting is required when existing fault isolation procedures in the basic manuals fail to isolate and correct a malfunction. The troubleshooting covered in this manual is based on the use of existing onsite equipment (tapes, tools, test equipment, spare parts, and publications). Isolation of malfunctions is based on the fault analysis of normal system operating conditions and the use of built-in maintenance and diagnostic (M&D) software programs Troubleshooting Aids. Volume 2 contains the detailed descriptions and the related functional block diagrams. The functional block diagrams are related to the functional logic diagrams in volume 3 by the titles of the functional areas. Power distribution diagrams, cabling diagrams, and front-panel schematic diagrams are also supplied in volume 3. a. Input/Output Tables. Input and output tables are provided, as applicable, for each figure and sheet to enable easy access to signals referenced to other diagrams. b. Input/Output Symbols. Symbols used on diagrams to indicate input and output signals include the following: * Indicates input from another figure. Indicates input from the same figure. Indicates output to another figure. Indicates output to the same figure. 5-1 Indicates output to the same and another figure. Indicates bidirectional signal flow. c. Equipment Interface. The troubleshooting diagrams may reference inputs and outputs interfacing between other pieces of equipment. When a notation shows that external equipment is involved, it is assumed that the user will refer to the applicable troubleshooting information provided for that equipment. d. Logic Symbols. Logic symbols depend on card types. For discrete circuit cards containing conventional integrated circuits, conventional logic symbols are used. These symbols are used independently, with card locations and card pin numbers notated with the symbol. For analog circuits, circuit card details are provided only to functional level Physical Description (fig. 5-1). The MTU includes magnetic tape transport Al and an associated tape cartridge, card cage assembly A2, dc/dc converter PS 1, and a front-panel assembly containing switches, indicators, and external interface connectors. Locations and reference designations of major components of the MTU are shown in figure 5-2. The MTU major subassemblies are described in the following subparagraphs. a. Front Panel Assembly (fig. 5-2). The front panel assembly contains all controls and indicators required for operation of the MTU. The controls and indicators permit the operator to place the MTU under automatic data processor (ADP) control, enable the write logic, advance or rewind the tape, enable the faultdetect logic, and perform self-test operations. External interface to the MTU is provided through device exchange channel (DEC) connector J 1 and POWER connector J2 mounted on the right side of the frontpanel assembly. Connector J1 provides signal connections between the MTU and ADP and also provides an interlock that makes sure that the interconnecting cable is terminated. Connector J2 provides dc power connections between the MTU and the power cabinet through the maintenance bench power duct and an external power cable.

8 Figure 5-1. MTU Major Subassemblies. MS

VOLTMETER, DIGITAL AN/GSM-64C (NSN )

TECHNICAL MANUAL OPERATOR S, ORGANIZATIONAL DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL VOLTMETER, DIGITAL AN/GSM-64C (NSN6625-024-0834) HEADQUARTERS, DEPARTMENT OF THE ARMY 11 MARCH 1983 Technical