CHAPTER 5 GENERAL SUPPORT MAINTENANCE INSTRUCTIONS

TM 32-5865-069-24&P

CHAPTER 5

GENERAL SUPPORT MAINTENANCE INSTRUCTIONS

5-1. SCOPE. This chapter provides the information required for general support

maintenance personnel to perform the maintenance tasks authorized in the Mainte-

nance Allocation Chart (MAC). Maintenance is performed using Electronic Equipment

Test Station AN/USM-410 for those items listed in table 5-1. Manual testing

procedures are provided for those modules not tested on the AN/USM-410. These

modules will be evacuated to SIG/INT EW section for diagnostic testing and repair.

5-2. TEST LEVEL DESCRIPTIONS. Four levels of test can be performed using the

AN/USM-410. The levels are defined as follows:

a. Level 1.

Go-chain (performance) test at unit level. No disassembly is

required.

b. Level 2. Unit level diagnostic tests necessary to isolate faults to a

printed circuit assembly/module; or a function group of printed circuit

assemblies/modules. Minimal disassembly is required for testing.

Go-chain (performance) tests at printed circuit assembly/module

Level 3.

level.

d. Level 4. Printed circuit assembly/module level diagnostic tests necessary

to fault isolate to the active piece part/functional group.

5-3. TEST PROCEDURES. Tests for each Unit Under Test (UUT) specified in

table 5-1 require Interface Devices (ID) and cables to connect the UUT to the

AN/USM-41O. The required items of test equipment for each UUT are identified in

table 5-1. Interconnection data is shown in the referenced figure. Automatic

Test Equipment Software Programs (ATESP) written for the UUTS specified are stored

on Test Program Tape (TPT) and are identified by a specific TPT number. TPT

number, program entry points and file names are listed in table 5-1. Operation of

the AN/USM-410 is described in technical manual PDEP 11-6625-2773-12-3. The test

procedure for each UUT is as follows:

a. Pre-test inspection:

(1) Inspect the UUT as described in table 5-2.

(2) Correct any defects found before beginning testing.

b. Preprogram start procedure:

(1) Perform the turn-on procedure for the AN/USM-410 as described in PDEP

11-6625-2773-12-3.

(2) Mount the ATESP magnetic tape in accordance with the instructions

detailed in PDEP 11-6625-2773-12-3.