Sectionalization Tests Using AN/TPM-25A

TM 11-6625-447-45/NAVAIR 16-30APM123-2/TO 33A1-3-367-22

5.1-6.1 Sectionalization Tests Using

u n i t from its case to expose test points and ad

AN/TPM-25A

j u s t m e n t controls as follows:

(1) Unlatch and remove the test set cover.

a. General. Sectionalization tests are per-

(2) two screws on each side tip and

formed to sectionalize a fault to a module or

bottom of front panel.

subassembly. Two sectionalization test charts

(3) Lift the test set from the case.

are provided. The first uses Radar Test Set

(4) Place the unit carefully on a clean area o f

AN/TPM-25A and the second uses Radar Test

t h e workbench. Position it for convenient access

Set AN/UPM-137A. Use of the sectionalization

to both the rear section and the front panel

test charts is described in c below.

Remove module retainer by removing the

b. Test Setup. Test setups are provided for

securing screws.

each type of test (fig. 5.1-7, 5.1-11, and 5.1-12).

c. Use of charts. The sectionalization test

Instructions for making primary power con-

charts (d and e. below) are step by step test

n e c t i o n s are in TM 11-6625-667-12. During the

p r o c e d u r e s . Each step should be followed in the

sectionalization tests, the required test setup is

order given for effective fault isolation. The

r e f e r r e d to and test conditions noted. Reference

Procedure column refers to the applicable test

should be made to figure 5.1-1 for location of

s e t u p and provides instructions for adjusting the

s p e c i f i e d internal test points. Test steps must be

equipment for a measurement. The Normal In-

performed in the order given for proper equip-

d i c a t i o n column specifies the results that should

ment connections and conditions. General in-

be observed. If the result is not normal in any

s t r u c t i o n s are provided in the charts for using

step, refer to paragraph 5.1-7 for the

t h e test equipment. These instructions should be

troubleshooting procedure necessary to localize

supplement with the instruction manual ap-

the trouble.

plicable to the specific test equipment used.

b e f o r e proceeding with a test setup, remove the

Change 5

5.1-10.5