Sectionalization Tests - TM-11-6625-667-450039

TM 11-6625-667-45/NAVAIR 16-30APM123-2/TO 33A1-3-367-22

Do not use test cables with exposed

The power must be turned off when a

(braided shields. Use jacketed cables

circuit card is to be removed or in-

to avoid short circuits where the cables

serted in the extender card. The card

must be inserted in the extender

must pass over the circuit cards and

receptacle before power is reapplied to

other subassemblies.

the test set.

a. Test Equipment Required

Technical manual

Test equipment

TM 11-6625-1709-15

Oscilloscope, AN/USM-281A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TM 11-6625-700-10

Frequency Meter AN/USM-207 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Modulator (MD-796) (pin diode type modulator preserves pulse risetime and

falltime to at least 25 nanoseconds.

Attenuator, Fixed (FSN 5905-781-0312).

TM 11-6625-299-15

Generator, Signal AN/URM-64A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TM 11-6625-200-15

Multimeter ME 26B/U . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TM 11-6625-366-15

Multimeter TS 352B/U . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TM 11-1242

Test Set, Crystal Rectifier TS 268/U . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TM 11-6625-274-12

Test Set, Electron Tube TV 7/U . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TM 11-6625-403-14

................................................

Test Set, Radar

NAVELEX 0969-158-1010

Test Set, Radar AN/UPM-137ATa . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

NAVAIR 16-30 UPM-

1337-6-1

AIR FORCE T.O. 33A1-

3-426-21-1

NAVELEX 0969-158-1020

NAVAIR 16-30UPM-

137-6-2

AIR FORCE T.O. 83A1-3-

426-21-2

TM 11-6625-539-15

Test Set Transistor TS 1836/U . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TM 11-6625-433-15

.......................... ...........................

Wattmeter

TM 11-6625-493-15

Comparator, Frequency CM-77A/USM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

the AN/UPM-98A or AN/UPM-98B may be used for all procedures.

If the Test Set, Radar AN/UPM-137A is used, the Oscilloscope AN/USM-182 and Test Set, Radar AN/UPM-98 are not

required.

summation Bridge TS 779A/U and Waveguide Probe MX-2144A/U.

b. Tools.

and services chart (TM 11-6625-667-12). TWO

(1) Repair Kit, Printed Wiring Board

sectionalization tests are provided, the first used

MK-722/U.

Radar Test Set AN/UPM-98A or AN/UPM-98B

and the second uses Radar Test Set

(2) Tool Kit, Electronic Equipment

AN/UPM137A.

TK-100/G.

b. Test Setups. A test setup is provided for

3-4. Sectionalization Tests

each type of test (fig. 3-5 for sectionalization

WARNING

tests using AN/UPM-98A or AN/UPM-98B and

fig. 3-5.1 for sectionalization tests using

Be extremely careful when working

AN/UPM-137A). Instructions for making

around the 115 volt AC power con-

primary power connections are in TM

nections. Serious injury or death may

11-6625-667-12. During the sectionalization

result from contact with these ter-

tests, the required setup is referred to and test

minals.

conditions noted. Refer to figure 3-6 for physical

a. General. Sectionalization tests are per-

location of the test points. Test steps must be

formed to sectionalize a fault to a module or

performed in the order given to ensure proper

subassembly. These tests are an extension of the

equipment connections and test conditions.

operational tests in the daily maintenance checks

Change 5 3-3