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
Chapter 6 • Troubleshooting
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 51
Backplane
• Verify incoming power. If there are no LED lights or LED activity is erratic
on any boards the backplane may be bad.
• Remove all circuit boards and check for damaged backplane connector pins.
Refer to the following image for the connectors to check.
• Re-seat all circuit boards to see if the symptoms go away.
• If the symptoms to not go away, you will have to remove the backplane.
• Remove all circuit boards using proper ESD procedures.
• Remove four backplane screws as indicated in the following image.
Check connectors for bent pins
4 Phillips screws