ARMY TM 5-6675-309-14
MARINE CORPS TM 08840A-14/1
Section I. GENERAL
This manual covers maintenance
the equipment design or use. It is not necessary to show
tions for Power Supply Test Set AN/USM-428 (PSTS).
a new design or list a better way to perform a proce-
dure, just tell why the design is unfavorable or why a
structions, and functioning of equipment are also in-
procedure is difficult. EIRs may be submitted on SF
(Standard Form) 368 (Quality Deficiency Report). Mail
1-2. Maintenance Forms and Records. Department
Commander, U.S. Army Troop Support Command
the Army forms and procedures used for equipment
maintenance will be those prescribed by DA PAM 738-
4300 Goodfellow Blvd.
750, the Army Maintenance Management System
St. Louis, MO 63120-1798
(TAMMS) or TM 4700-15/1, the Marine Corps.
Marine Corps users shall submit NAVMC FORM 10772
of Army Materiel
to Prevent Enemy
"Reporting Errors and Recommending Improvements."
Use. Refer to TM 750-244-2 for procedures for destruc-
tion of this equipment to prevent enemy use.
Commandant of Marine Corps
Headquarters, Marine Corps
1-4. Administrative Storage. Refer
to TM 740-90-1
procedures, forms, records, and inspections required
Washington, DC 20380
during administrative storage of the PSTS. Marine
Corps users shall refer to MCO 4450.7 for this informa-
A reply will be sent directly to you.
1-6. Reporting Equipment Improvement Recommen-
dations (EIR). EIRs can and must be submitted by
anyone who is aware of an unsatisfactory condition with
Section Il. DESCRIPTION AND DATA
(1) The PSTS is used to verify a fault, isolate the
fault to a plug-in module or chassis-mounted compo-
a. Purpose. The PSTS is specifically designed for
nent, and to verify correct operation after repair.
testing and troubleshooting Power Supply PP-7352/
(2) The PSTS tests for proper operation of over-
USQ-70 and computer power supply (part of Computer
voltage, undervoltage, and overcurrent circuitry in the
CP-1283/USQ-70). Both power supplies are part of the
unit under test (UUT). Each test is made using various
Position and Azimuth Determining System AN/USQ-
loads, input voltages, or control signals. The UUT
70. These equipments are referred to herein as PADS
monitor and control signals are tested by controls,
PS (or PS), and PADS COMP PS (or COMP PS). Al-
indicators, and test jacks on the PSTS front panel. The
though both power supplies are tested on the PSTS,
only one can be connected and tested at any given time.
A fixed 28-VDC power source and a variable 0-to 40-
VDC power source are required to supplement the
PSTS testing of the power supplies. These power
sources are switched within the PSTS.