TM 5-6350-255-13
Table 5.1. TROUBLESHOOTING -- Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
.j If peragraph c saIl falls, check for a + 6. volt 15 millisecond pulse at pin D on the Interface connector with an
oecllloscope whom tappleg the geophone spike.
k If the +6 volt. 15 millisecond pulse is observed in paragraph J, disconnect the transmitter from the encoder.
Check pin 36 of the encoder for the +6 volt 15 millisecond pulse. If the pulse is not there, very carefully check the
wiring into the code plug for an open. If the wiring checks our properly, replace the interrupt/control assembly.
l. If the pulse checked in paragraph i is missing, replace the seismic module and repeat paragraph c.
m. If paragraph c stil fails, temporarily replace the geophone and cable assemebly by disconnecting the small
connector on the seismic module and reconnecting a new geophone and cable assembly. Repeat paragraph c. If
paragraph c is successful, replace the geophone and cable assembly permanently.
5-9