Specifications

4.4 Troubleshooting
The following table (continued on the next page) identifies troubleshooting problems and
solutions for the SEM-4020.
Problem Solution
Module will not mate with the field
connector.
1. Check the orientation of the field
connector. Make sure that pin 1 is at
the top.
2. Check the field connector for proper
mounting and position on the rear z-
rails.
3. Check the keying of both connectors.
Make sure you do not connect the
DSM to a connector wired for other
peripherals (damage may occur).
4. Check for bent pins on the male
connector, or plugged sockets on the
female connector.
Problem Solution
The Communications LED (Green) is
OFF, or ON SOLID
The SEM is NOT Running.
1) Make certain that the SEM is fully seated
in its slot.
2) Make certain that the Module Rack is
Powered, and Turned on.
3) Make certain ICM is running, & no
downloads, are occurring.