Installation Manual

8-136 Troubleshooting
12. Locate the backside of J24 on the Main Interface PWA labeled NEEDLE SENSOR.
13. Measure VDC between Pin 4 and Pin 5 on J24.
14. Is the reading 24 VDC?
Main Interface PWA (P/N 60-1200-00) has failed.
See
Parts Replacement section.
Go to Step 15
15. Locate backside of J24 on the Main Interface PWA labeled NEEDLE SENSORS.
16. Measure VDC between Pin 6 and Pin 5 on J24 while toggling the Tactile Sensor.
17. Does the signal change from 24 VDC to 0 VDC?
Go to Step 18
Main Interface PWA (P/N 60-1200-00) has failed. See Parts
Replacement
section.
18. Check Cable (P/N 06-4599-00) for continuity (Pinout is 1 to 1).
19. Does the cable have continuity?
Cable (P/N 06-4599-00) has failed. See Parts
Replacement
section.
Tactile Sensor (P/N 55-5615 has failed. See
Parts Replacement section.
20. Locate U22 on the Main Interface PWA.
21. Measure VDC at Pin 3 on U22 while toggling the Tactile Sensor (use TP1 for ground).
22. Does the signal change from 5 VDC to 0 VDC?
Main Interface PWA (P/N 60-1200-00) has failed.
See
Parts Replacement section.
Contact Asymtek Technical Support
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