TM 10--3510--221--24
0107 00--1
TYPICAL DISCRETE INPUT SIGNAL FAULT
0107 00
THIS WORK PACKAGE COVERS:
Troubleshooting Typical Discrete Input Signal Fault
INITIAL SETUP:
Maintenance Level
Materials/Parts
Unit
Tools and Special Tools
Equipment Conditions
Tool Kit, General Mechanics (Item 1, WP 0272 00)
Power must be applied at main control
Multimeter (Item 2, WP 0272 00)
enclosure (WP 0010 00).
1. Open door on main control enclosure. Verify SW1 and SW2 are ON.
2. ESD. Check for >11 VDC between PCB2 J1 terminals (2) and (3).
Is >11 VDC present?
YES Go to step 3.
NO Go to NO +12 VDC POWER AVAILABLE (WP 0100 00).
3. Position SW1 then SW2 to OFF.
4. ESD. Check wire connections between suspect discrete component and PCB2.
Are connections OK?
YES Go to step 5.
NO Repair as necessary.
5. ESD. Check ribbon cable connections between PCB2 and PCB8.
Are connections OK?
YES Go to step 6.
NO Repair as necessary.
6. ESD. Check to ensure PCB8 and PCB9 are properly seated in card cage.
Are PCB8 and PCB9 properly seated?
YES Go to step 7.
NO Properly seat PCB8 or PCB9.
7. Position SW1 then SW2 to ON.
8. ESD. Check for >11 VDC between card cage connector wire numbers (192) and (193).
Is >11 VDC present?
YES Go to step 9.
NO Go to NO +/--12 VDC POWER AVAILABLE (WP 0101 00).
