TM9-4935-481-14-1
C4
Table 3-16. Tracker Performance Test-Continued
Table 3-16. Tracker Performance Test-Continued
STEP
UNIT
PROCEDURE
CORRECTIVE ACTION
STEP
UNIT
PROCEDURE
CORRECTIVE ACTION
39
Remove the firing mechanism from the tracker as per instructions contained in TM 9-1425-484-24.
49
Replace or repair the faulty component.
40
Solder the leads of a new firing mechanism to the tracker filter and rerun the TRIG OUTPUT test on the
TTS.
50
Install the firing mechanism.
Proceed with step 42.
51
Rerun the tracker on the TTS.
41
Install the new firing mechanism as per TM 9-1425-484-24, and rerun the tracker on the TTS.
52
PP
MAIN POWER switch to OFF.
42
Unsolder the firing mechanism leads from the tracker filter.
43
44
MCP
DMM INPUT switch to DMM INPUT.
45
MCP
DMM LO switch to EXT.
46
MCP
DMM FUNCTION switch to K OHMS.
47
PP
MAIN POWER switch to ON.
48
Perform resistance measurements as necessary, utilizing the DMM probes and the tracker schematic
diagram located in TM 9-1430-483-34 to isolate the malfunction to a short or an open in the trigger
high or low side. Unsolder wires as necessary to isolate circuitry. Replace the CSCB as a final check.
NOTE
The maximum resistance for either line from the exposed filter
side through to the CSC board connector should be < 0.010 k
ohms. The minimum resistance from the exposed filter lead to
the exposed ground lug beside it should be> 9.000 k ohms.
3-273