w w w . t e c h n i c o l o r . c o m / m c s
Page 94
If the above conditions have all been met and you still do not see any LEDs lit, there is probably
an issue with your system.
More commonly, you may see unlit LEDs on one or multiple COM46 cards, but not the
whole chassis. Things to check for when this situation occurs:
All COM46 cards are fully aligned in their grooves.
All COM46 cards are properly connected to their receivers on the back panel.
All thumbscrews are tightened completely.
If any COM46 cards remain unlit after ensuring that all of these conditions have been met,
there may be something wrong with the cards.
13.3
System Startup
It is important to understand the behaviors associated with the execution of normal procedures
before you can effectively diagnose any card issues. This section covers the sequence of events
that occur in a COM2000 system at boot-up.
The COM46 card goes through four steps at startup:
1)
Self test This includes SWiM channel lock.
2)
IP Initialization (obtain IP address, establish network connectivity)
3)
DIRECTV Program Guide acquisition
4)
Channel acquisition and video streaming
