IR Board Fried?

[Mr-Shutter]

Determining Why Your IR Board is DEAD
There are two main possible causes for IR board death.
First and most common, you hooked up groud and v+ backwards.
To confirm this apply a +12V supply to pin 1 and or 2, then ground to pin 3 and or 4. Messure the voltage at the top of capacitor 4. This should be +5v, if it is 0v then your power supply has died. You need a LM7508 5volt power reulator and replace with the one on the board. A quick fix is to use the +5volts from the RC board and hook it up to 1 and 2 then 3 and 4 to ground.
Jump the connections on the power regulator (u2) on the back of the PCB. You will notice a close cluster of 3 solder point. You must jump the outer connections of the group of 3. This is how you jump the regulator. If you do this YOU MUST MAKE SURE YOU INPUT IS +5. If it is not you will kill the board.

Otherwise order a replacement power reuglator for U2.

If you have a +5 voltage from c4 then you must have fried the board. You need to order a new one D:

Hope this Helps.

[StevenB]

From FIRST's schematic, the part is an LM78L05, available from Digi-Key.
http://search.digikey.com/scripts/Dk...ywords=LM78l05
Any of the TO-92 package chips should work.