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Chapter 8: Troubleshooting
Testing link end hardware
4
Check that test point P1 on the LPU PCB corresponds to pin 1 on the RJ45. Repeat for points
P2 to P8. This test is only valid if both the PSU and the ODU are disconnected.
5
Reconnect the ODU cable to the PSU.
6
Check that the PWR LED near the top right of the LPU PCB is illuminated to indicate power in
the Ethernet cable.
7
If any test fails, replace or repair the cable that connects the PSU to the LPU or ODU.
Ethernet LED blinks ten times then stays off
Meaning: There is no Ethernet traffic between the PSU and ODU.
Action: The fault may be in the LAN or ODU cable:
•
Confirm that Ethernet traffic is connected to the AC+DC injector LAN port, confirm the cable is
not faulty, replace if necessary.
•
If the LAN connection to the AC+DC power injector is working, check the drop cable is correctly
wired using a suitable cable tester. Repeat the drop cable tests on page
Page
8-4