Problems with IR Board

[Daniel Bathgate]

I can not make our board work either. I have tried hooking it up to a 9 volt battery and a benchtop power supply set to 9 volts, and have verified that there are 5 volts across C4 and the pins 2 and 3 on the white connector. However, nothing happens when I connect power. If I hold down the "learn" button and connect the battery, none of the LEDs light.

I've paranoidly double checked the polarity every time I've connected it, and since I have been fairly careful, I doubt static has damaged it (though that is always a possibility.) I seem to attract problems sometimes...

---[More fiddling with the edit window still open]---

Aha! Our board DOES work. Just not the LEDs. I checked across the contacts of the LEDs with my trusty voltmeter after entering the setup sequence, and low and behold CMD0 had 5 volts across it. So I tried going through the whole learning sequence, then held my voltmeter to the connector and saw a voltage jump whenever I pressed the button. It works! Either all of the LEDs are bad, or could it be the LEDs are wired backwards? According to the voltmeter, the positive leads (for all but ERROR) are the ones towards the outside, which is the side of the LED that has the little notch and the larger piece of metal internally. If I'm reading the Wikipedia page correctly, it seems they should be the other way around.

That's something I could fix myself, but following BMW's recommendation I won't attempt it. Good to know ours works except for that though!