Technical Manual
Table Of Contents
- Table of Contents
- Product Specifications
- Warnings, Cautions, and Notes
- Introduction
- Commissioning
- Tools Required
- Connect to the Main Board
- Commission the DCU
- Installer Commands
- Global Commands
- Administrator Commands (for an LTE Backhaul)
- Alarm Menu
- Manufacturing Menu
- MTU Menu
- Transceiver Menu
- Records Menu
- Power Supply Debug Menu
- Transceiver Debug Menu
- Advanced Menu
- Global Navigation Satellite System (GNSS) Menu
- Maintenance
- Troubleshooting
- Testing the DCU
- Local Menu “WALL” Command Information
- DCU-Generated Headend Messages
- Index
42 D C U M a i n t e n a n c e a n d O p e r a t i o n M a n u a l
Repairs
6. Ensure you are properly grounded with an ESD strap.
7. Loosen screws and remove the DB9 connectors from the main board. Note
the location for each connector. You will need to reattach the connectors in
the same place on the new board.
8. Loosen screws and disconnect the ribbon cable from the main board.
9. .Remove the cellular coaxial cable, if it is interfering with the main board.
10. Remove the push bars installed through the card guide.
11. Pull the card out.
12. Insert the new card.
13. Reattach the cables as originally connected.
14. Replace the cover.
15. Reattach the DC power harness.
16. Reconnect AC power.
Ribbon Cable
Coaxial Cable
DB9 Connectors
Push Barbs