TM-9-1040-267-20-P
LAUNCHER, GRENADE, SMOKE: SCREENING, RP, M243; RP, M257; RP, M259
TECHNICAL MANUAL; ORGANIZATIONAL MAINTENANCE MANUAL (INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST)
FEBRUARY 1984
TM-9-1040-267-20-P - Page 24 of 108
2-10
TM 9-1040-267-20&P
Table 2-2. TROUBLESHOOTING procedures (CO/VT).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ARMING FIRE UNIT
2. ARMING FIRING UNIT WON’T FIRE DISCHARGERS
NOTE
Do not let multimeter probe prod touch electrical receptacle connector shell. This will cause wrong meter reading.
●
Insure good contact by multimeter probe prod on test point. Poor contact will cause false meter reading.
●
Check key on electrical receptacle connector to locate position of pins A through F.
Step 1.
Set range switch on RX1 000 and zero multimeter. Move toggle switch
lever (1) to OFF. Touch red probe prod on pin C and black probe prod on
pin E of the electrical receptacle connector (2).
a. If meter reads zero (0) on OHMS scale, no fault.
Go to step 2.
b. If any other reading, faulty arming firing unit.
Replace arming firing unit.
Step 2.
Touch red probe prod on pin D and black probe prod on pin F of electrical
receptacle connector (2).
a. If meter reads zero (0) on OHMS scale, no fault.
Go to step 3.
b. If any other reading, faulty arming firing unit.
Replace aiming firing unit.
Step 3.
Touch red probe prod on pin D and black probe prod on pin B of electrical
receptacle connector (2).
a. If meter reads zero (0) on OHMS scale, no fault.
Go to step 4.
b. If any other reading, faulty arming firing unit.
Replace arming firing unit.
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