Installation Manual
Troubleshooting 8-39
Light Beacon Signal Verification
1. Locate U6 on the Main Interface PWA.
2. With Front Hatch closed, measure VDC between Pin 3 and Pin 4.
3. Is the reading greater than 23 VDC?
Go to Step 4
Main Interface PWA (P/N 60-1200-00) has failed. See Parts
Replacement
section.
4. Press the black OFF (0) button on the Operator’s Console and switch the Main Circuit Breaker to the
OFF (0) position.
5. Disconnect the Beacon Cable (P/N 06-4538-00) from J4 on the XY Servo Interface PWA.
6. With the Front Hatch closed, measure VDC between Pin 1 and Pin 4.
7. Is the reading greater than 23 VDC?
Servo Signal Interconnect Cable B (P/N 06-4525-00)
has failed. See
Parts Replacement section.
Light Beacon (P/N 194035) has failed. See
Parts Replacement section.
No
Yes
No
Yes