TM 5-3810-295-34
while doing. Ohmmeter should be set on 100K ohm scale.
(22)Since bell and remote indicator cables (P-2
Meter should read infinity, no deflection allowed. (Do not
and P-4) have been tested previously, failure for both
touch pins of meter leads with fingers as body will give
the red light and bell to not function indicates an internal
erroneous signal). Leakage is cause for rejection.
failure of LSTC console and both units must be replaced. If
either bell or light circuit does not function, then, each circuit
(4) Check both ends of cable for short or excessive
should be rechecked per steps 2, 16, 17, and 18.
leakage from each pin to connector housing. Ohmmeter
(23)Failure of four test positions to malfunction after
should be set on 100K ohm scale. (Do not touch pins of
previously completing test steps 1 through 30 indicates a
meter leads.) Leakage is cause for rejection.
defective LSTC console, and both matched units must be
(5) Check schematic for shield if used and verify that
replaced.
shield is not grounded to connector housing and that shield is
c.
Cable Testing Procedure. Refer to figure 8-7 and
not open using subparagraphs (3) and (2) respectively,
above. Leakage or open is cause for rejection.
test LSTC cables as follows:
(6) Check ends of cable for moisture. This can be
(1) Disconnect cable from both ends and also
removed by air drying or by washing connector with alcohol.
disconnect any terminals on the cable assembly.
(2) Using an ohmmeter (1 ohm scale), check for
NOTE
continuity pin to pin or pin to lead per the particular electrical
If leakage exists, dry cable and retest before
schematic that corresponds to the cable. Continuity should
rejecting.
be per schematic.
(3) Using an ohmmeter, check for shorts or excessive
leakage from pin to pin. Refer to schematic
8-9
