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

  TM-9-1290-365-24-P - Page 269 of 334

ARMY TM 9-1290-365-24&P
D.7.13.2
Deleted
D.7.13.3 DOPPLER INPUT CIRCUIT FAILURES. Failure in test procedure para. D.7.12.5.
D.7.13.3.1
D.SIN Failure. Failure in test procedure para. D.7.12.5d.
a. Check the Doppler input circuit diodes CR9, CR10, CR11 and related components.
b. Check buffers and amplifier U36 outputs for signal levels equal to input level.
D.7.1 3.3.2 DOP.OUT Failure. Failure in test procedure para. D.7.12.5f.
a. Check shaper U29, pin 13 for logic levels, square wave signal with the same input frequency.
b. Check related components.
D.7.13.3.3
D.TRIG Failure. Failures in test procedure para. D.7.12.5h., j.
a. Check U36, pin 14. Check related components.
b. Check shaper U29, pin 2. Check related components.
D.7.13.4 FUNCTIONAL FAILURES. Failure in test procedure para. D.7.12.6.
D.7.13.4.1
No communication. The UUT does not respond to communication from PC. Failure in test
procedure para. D.7.1 2.6g.
NOTE
Reset PC and re-run software. Reset 1553 simulator.
a. Check for logic 1 on U33, pin 15 (/RESET). If 0 (processor is in reset state), check for proper
operation of the processor circuitry lAW para D.7.1 3.5.
b. Using oscilloscope, check that the transmission signal from PC arrives at Ti, between pins 5 and 7.
c. Check for logic level pulses, on U42, between pins 40 and 41. If failed, replace Ti.
d. Check for logic 0 on U33, pin 16. If failed, replace U33.
e. Check for logic 1 on U33, pin 10. If failed, replace U33.
f.
Check for 4.3 ± 0.3 Vdc on diode CR4, cathode. If failed, check diode CR4 and capacitor C44.
g. Check for logic 0 on U33, pin 5. If failed, replace U33.
h. Check for +4.5+0.5Vdc on collector of transistor Q1. If failed, replace Q1.
i.
Temporary replace U34 with a new component.
j.
Run the software on PC.
k. 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. Re-run the software
as many times as needed to perform the troubleshooting.
I.
Check for logic level pulses on U13, pins 21 and 18. If failed, replace U13.
m. Check for logic level pulses on U28, pin 8. If failed, replace U28.
n. If not failed, replace U42.
D.7.13.4.2 BIT FAILURE TRUE Failures. Failure in test procedure para. D.7.1 2.6i.
D-99


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