CHAPTER 1 INTRODUCTION

ARMY TM 5-6675-238-14 MARINE CORPS TM 08839A-14/1 CHAPTER 1 INTRODUCTION Section I. GENERAL 1-1. Scope. This manual covers maintenance instruc- tions for Position and Azimuth Determining System Test Set AN/USM-427 (PADS test set). This equipment is operated and maintained at the general support level. Unpacking and installation instructions, operating in- structions, and functioning of equipment are included. 1-2. Maintenance Forms and Records. Department of The Army forms and procedures used for equipment maintenance will be those prescribed by DA PAM 738- 750, The Army Maintenance Management System (TAMMS). Marine Corps personnel will prepare and maintain records and report forms as prepared by TM- 4700-15/ 1, Equipment Record Procedures. 1-3. Destruction of Army Materiel to Prevent Enemy Use. Refer to TM 750-244-3 for procedures for destruc- tion of equipment to prevent enemy use. 1-4. Administrative Storage. Refer to TM 740-90-1 for procedures, forms, records, and inspections required during administrative storage of the PADS test set. Marine Corps users shall refer to MCO 4450.7 for this information. 1-5. Calibration. No calibration of the PADS test set is required. Specific adjustment procedures are in chapter 8. 1-6. Reporting Equipment Improvement Recommen- dations (EIR). EIRs can and must be submitted by anyone who is aware of an unsatisfactory condition with the equipment design or use. It is not necessary to show a new design or list a better way to perform a proce- dure, just tell why the design is unfavorable or why a procedure is difficult, Army users may submit EIRs on SF (Standard Form) 368 (Quality Deficiency Report) to: Commander, U.S. Army Troop Support Command ATTN: AMSTR-QX 4300 Goodfellow Blvd. St. Louis, MO 63120-1798 Marine Corps users are encouraged to submit EIR’s in accordance with MCO 1650.17. They shall submit Quality Deficiency Reports in accordance with MCO 4855.10. Mail directly to Commanding General, Marine Corps Logistics Base (P840), Albany, GA 31704-5000. Marine Corps users shall submit NAVMC Form 10772 “Reporting Errors and Recommending Improvements.” Send to: Commandant of the Marine Corps Headquarters, Marine Corps Code LMA-1 Washington, DC 20380 Section II. DESCRIPTION AND DATA 1-7. Purpose and Use. a_.Purpose. The PADS test set (figure 1-1) Provides testing and troubleshooting of the Position and Azimuth Determining System AN/USQ-70. Provision is made to automatically sequence test operations and operator actions. The PADS test set provides duplication of the PADS Control and Display Unit C-10164/USQ-70 on/ off, enter functions, and failure indicators. Provisions are incorporated in the PADS test set to control power turn-on to PADS. PADS Computer CP-1283/USQ-70, once checked out by the PADS test set, is then used to verifv PADS Inertial Measurement Unit MX-9832/ USQ-70 operation. b. Use. The PADS test set is used to test all com- puter functions and load and verify the computer mem- ory with an operational program or diagnostic program. Use of the PADS test set can isolate a malfunction to plug-in modules within the computer and control and display unit. 1-8. Description. The PADS test set consists of a Signal Processor Unit TS-3617/USM-427, Punched Tape Reader RF-239/USM-427, and Buffer Unit CV-3404/ USM-427. In addition, a Signal Processor Unit Case CY- 7563/USM-427, Punched Tape Reader Case CY-7562/ USM-427, and Test Set Accessories Case CY-7609/ USM-427 are provided to house the equipment during transport. These cases are hereinafter referred to as transit cases. Change 1 1-1