Troubleshooting
External Input Does Not Recognize External Contact Closure
25
External Input Does Not Recognize External Contact Closure
Table 20. Troubleshooting Procedure for External Input Not Recognizing External Contact Closure
Probable Cause
Action
OK
?
Action
1. Setup problem - external input is not
enabled.
Verify external input is enabled in the GUI.
No
Enable external input.
Yes
Go to next cause.
2. Incorrect external wiring to external
input connector
Remove the console’s cover following steps1 & 3 in
Display/CPU Assembly removal instructions on page
26.
Verify the external input plug is pushed all the way
into the connector (Item 3 in Figure 2). Verify each of
the wires is correctly seated in the plug’s terminal
clamps. If the clamps are not opened all the way
when inserting the wires into the plug, the wires can
be inserted behind the clamps preventing proper
contact.
No
Correct wiring connections.
Yes
Replace USIOM board.
