Main Test.

TM 11-7010-201-40-5/ET821-AA-MMI-050/E154 MTS/T O 31S5-2TSQ73-2-5

(7) Measure resistance between J01-257 and GND; resistance should be less than one ohm.

(8) Measure resistance between J01-259 and GND; resistance should be less than one ohm.

d. Main Test.

(1) Turn power supply on and check that Y ADDRESS, X ADDRESS, TC, CK, SELF TEST, CARD ID, and STATE

indicators light.

NOTE

Use GND binding post as ground reference for the following steps.

(2) Measure voltage at J01-256; voltage should be + 5 + 0.5v.

(3) Measure voltage at J01-258; voltage should be + 5 + 0.5v.

(4) Using oscilloscope, measure voltage at J01-108 for + 3.25 1.75v. Press and hold SCP switch and check that

J01-108 goes to 0 0.5v without any bounce. Release SCP switch and check that J01-108 goes back to + 3.25 1.75v

without any bounce.

(5) Press LT switch and check that all front panel indicators light.

(6) Turn DATA/FUNCTIONAL/CONT switch to DATA.

(7) Check that all front panel indicators light.

(8) Perform the following test for each pin listed in table 5-2:

(a) Jumper J01-259 to J01-1, and check that all indicators except STATE 1 light.

(b) Press LT switch and check that STATE 1 indicator lights.

(9) Turn DATA/FUNCTIONAL/CONT switch to FUNCTIONAL.

(10) Check that indicators 1 through 72 do not light and all other indicators light.

(11) Perform the tests shown in table 5-3 for each pin listed.

(12) Turn DATA/FUNCTIONAL/CONT switch to OFF.

(13) Check that indicators 1 through 72 do not light and all other indicators light.

(14) Perform the tests shown in table 5-4 for each pin listed.

(15) Turn off power supply.

(16) Disconnect power supply from MTS test aid.

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