Problems with IR Board

[billbo911]

Originally Posted by Kevin Sevcik

I'm thinking this might be an oversight in the circuit design. The 78L05 series of regulators are rated for 100mA max output current. And the IR manual claims the circuit draws 100mA when an LED is on.

I can't say I agree with this. Here is a quote from the IR board users manual:

When a single LED is on, the current should increase to approximately 19 mA.

It also says:

With a single LED on, the power consumption will increase to approximately 228mW.

Which at 12vdc: (228mW/12vdc) = 19mA.
So at least they agree. My guess is that it is not a design flaw, but more likely a user error. (Sorry, I don't mean to point fingers.) I believe it is more likely the board shorted on something, whether it was one of the output wires or the back board. Either way, replacing the regulator "should" resolve the issue.
So far, I have only read about 2 or 3 boards failing, each time it appears to be the regulator. I'm not ready to jump to any conclusions yet. Let's see if a more consistent pattern develops.