TM-9-1290-365-24-P
PALADIN MUZZLE VELOCITY SYSTEM M93 UPGRADED
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST
OCTOBER 2000
TM-9-1290-365-24-P - Page 271 of 334
ARMY TM 9-1290-365-24&P
i.
Check for logic level pulses on U13, pin 19. If failed, replace U13.
j.
Check for logic level pulses on U14, pin 14. If failed, replace U14.
k. Check for logic level pulses on U19, pin 11. If failed, replace U19.
I.
Check for logic level pulses on U15, pins 2,5 and 6. If failed, replace U15.
m. Check for logic level pulses on U13, pins 16 and 23. If failed, replace U13.
n. Check for logic level pulses on U21, pins 18, 5 and 3. If failed, replace U21.
o. If not failed, replace U23 and U31.
D.7.1 3.4.2.3 Possible PORTS Failures.
a. Choose “SHUTDOWN” option from the EVENT menu, verify the following message on screen
“SHUTDOWN COMPLETE”. Turn off power switch on tester, wait about 5 seconds and turn on the
power switch.
b. Temporarily replace U34 with a new component.
c. Re-run the test as many times as needed to perform the troubleshooting.
d. If the failure does not reappear, the malfunction is corrected. U34 was the failed component. If the
failure reappears, reassemble the original U34 and proceed with steps below.
e. Check for logic level pulses on U13, pin 19. If failed, replace U13.
f.
Check for logic level pulses on U14, pins 13 and 14. If failed, replace U14.
g. Check for logic level pulses on Ul9, pins 3, 8 and 11. If failed, replace U1 9.
h. Check for logic level pulses on Ul7, pin 15. If failed, replace U1 7.
i.
Check for logic level pulses on U15, pin 19. If failed, replace U15.
j.
If not failed, replace U2.
D.7.13.4.3
Measurement Failures. Failure in test procedure para. D.7.1 2.6k., m.
D.7.13.4.3.1
ANT.PWR Indicator Failure.
a. Check for logic 0 on U17, pin 5. If failed, replace U17.
b. Check for transistor Q2, shorted emitter or collector not shorted. If shorted, remove shorting or
replace Q2.
c. Choose “SHELL” option from the EVENT menu. Turn ACOL switch to ON and then to OFF. Re-run
the test as many times as needed to perform the troubleshooting. Deenergize function generator
for troubleshooting.
d. Choose “SHELL” option from the EVENT menu and turn ACCL switch to ON, check for logic 1 on
Ul7, pin 5. If failed, replace Ul7.
e. Check for 0.7 ± 0.2Vdc on transistor Q2 base. If failed, check diode CR17, resistors R112 R9.
Check that Q2 base is not shorted to ground.
f.
Check for transistor Q2 is saturated. If failed, replace Q2.
D.7.1 3.4.3.2 Incorrect or No Measurement Result Failure.
a. Choose “SHELL” option from the EVENT menu. Turn ACCL switch to ON and then to OFF. Re-run
the test as many times as needed to perform the troubleshooting.
b. Check for logic 1 on U17, pin 6. If failed, replace U17.
c. Check for logic 0 on U11 pin 12. If failed, replace U11
d. Check for logic level square wave of 50KHz on U18, pin 6. If failed, replace U18.
D-101
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