Troubleshooting Wiring-continued

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

h. Set DATA/FUNCTIONAL/CONT switch to FUNCTIONAL or CONT, depending on error condition observed on

MTS display.

NOTE

If both FUNCTIONAL INPUT ERROR and FUNCTIONAL OUTPUT ERROR indicators

on the MTS light, there is a short circuit in the input signal line. If only the FUNCTIONAL

OUTPUT ERROR indicator lights, the fault is in the output signal line.

Check MTS test aid indicators 1 through 72 and note which indicator lights.

j. Using table 3-4, column 1 (MTS test aid lamp number), locate lamp number corresponding to indication noted in

step i. On same line of table 3-4, locate pin number corresponding to appropriate circuit card assembly part number.

k. Refer to system maintenance manual to determine applicable wire list number, then to the wire list in Section VI

of Chapter 5 of this manual.

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