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