Quantcast Table 5-11. Troubleshooting - continued. - TM-9-1270-219-13-P0110

 

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Table 5-11. Troubleshooting - continued. - TM-9-1270-219-13-P0109
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TM-9-1270-219-13-P Fire and Flight Air Data Subsystem Helicopter Armament: XM 143 PN 03-004-02 Manual
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Table 5-12. TP7, TP8 Outputs.
TM 9-1270-219-13&P
Table 5-11. Troubleshooting - continued.
Malfunction
Test or Inspection
Corrective
Action
Step 32 Set S10 to Vv and measure the voltage at TP7 and TP8. The result should be 10.000V 100mV.
If the result is out of tolerance, replace the Analog Interface Unit as specified in Section V.
Step 33 Set S10 to Vw and measure the voltage at TP7 and TP8. The result should be +3.333V 100mV.
If the result is out of tolerance replace the Analog Interface Unit as specified in Section V.
Step 34 Set S10 to Vlu and measure the voltage at TP7 and TP8. The result should be +5.000V 100mV.
If the result is out of tolerance replace the Analog Interface Unit as specified in Section V.
If replacing the Analog Interface Unit does not correct the failure, replace the front panel assembly.
Step 35 Set S10 to V  lv and measure the voltage at TP7 and TP8. The result should be 3.333V 100mV.
If the result is out of tolerance replace the Analog Interface Unit as specified in Section V.
If replacing the Analog Interface Unit does not correct the failure, replace the front panel assembly.
Step 36 Set S2 to CPU TEST down. Set S8 to V  u and observe the DATA WORD display. The display should read 042
4.
If display is incorrect replace the Central Processor Unit as specified in Section V.
Step 37 Set S8 to Vv and observe the DATA WORD display. The display should read 142 12.
If display is incorrect replace the Central Processor Unit as specified in Section V.
Step 38 Set S8 to Vw and observe the DATA WORD display. The display should read 178 12.
If display is incorrect replace the Central Processor Unit as specified in Section V.
Step 39 Set S8 to P  ABS a n d o b s e r v e t h e D A T A W O R D d i s p l a y . T h e d i s p l a y s h o u l d r e a d 2 0 3 3 .
If display is incorrect replace the Central Processor Unit as specified in Section V.
Step 40 Set S8 to T  AIR and S6 to +15. Observe the DATA WORD display. The display should read 140 6.
If display is incorrect replace the Analog Interface Unit as specified in Section V.
Step 41 Set S8 to V  D W and observe the DATA WORD display. The display should read 000 12.
If the display is incorrect replace the Central Processor Unit as specified in Section V.
Step 42 Set S7 to 10, S4 to up, B1 to 60, B2 to 55 and vent PS a n d PT to atmosphere. Set S8 to V  u a n d o b s e r v e t h e
DATA WORD display. The display should read 031 12.
If display is incorrect replace the Central Processor Unit as specified in Section V.
5-26

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