Steve Howlett Posted April 10, 2010 Posted April 10, 2010 So i have the kit all soldered up and tested on each channel with the low power heat sinks.I cleaned the board with some flux remover and some isopropyl alcohol, waited for it to dry and then installed the large/high power heat sinks.I then plugged in my controller and my computer identified it, status light said everything was good/ was solid but my outputs wouldn't turn on.I followed the instructions to do a reset and when i plugged my controller back in the LED wouldn't turn on at all.I checked the board again for solder bridges again to make sure and everything was fine. Did voltage checks on the diodes and noticed i was getting lower then 24v out and less then 5 on my j0 pins.I checked the 5v reg and noticed it was getting hot, checked through the troubleshooting guide and it told me to remove ic's that were in the holders and i found that with rs485/u1 chip removed the 5v reg wouldn't get hot and my led would flash as normal. I checked the voltages again and i got 29V at the diodes (between left of d1 and d2) this time, 5v on the 4th left j0 pin and gnd and 9.5 v at the 3rd left j0 pin meaning that everything is fine without the u1 chip.Do you think my chip is fried?? andIf so what do you think could of caused this to happen?My regs are in the correct positions. No solder bridges and the U1 chip is supposed to be ESD safe so i didn't think i would manage to fry it while cleaning the board.Any suggestions would be greatly appreciated!
ErnieHorning Posted April 10, 2010 Posted April 10, 2010 I'd look around the top side of the board for stray lead wires from clipping resistors, capacitors, ect. They can get caught it the flux pretty easily for awhile after soldering. It tends to remain sticky for several minutes after being heated. Cleaning with flux remover will loosen the wires and allow them to move around. Also look under the sockets which can easily hide a wire.If you don't find anything, I would chock it up to infant mortality. If a part is going to fail, it's most likely going to do so in the first few seconds. Call LOR support and get a replacement IC. You'll probably receive it in just a couple of days.
Steve Howlett Posted April 10, 2010 Author Posted April 10, 2010 Thanks for the reply!Yeah i checked around everything, i don't see any stray clippings or bits of solder. I'm guessing ill have to call LOR to get a new IC. Its strange for it to be working before and not now though, i was playing with it with the low power heat sinks for a bit before i decided to clean up and throw on the high power ones.
cmoore60 Posted April 10, 2010 Posted April 10, 2010 It is nothing new for the comm chip to fail and cause this type of problem.Simply email support@lightorama.com explain what has happened and they will take care of you.Chuck
Steve Howlett Posted April 11, 2010 Author Posted April 11, 2010 Hey guys i got a response and im gonna get a new chip sent to me. Just in case anyone else was wondering what happend heres the reply i got when i emailed support."Hi Steve,It sounds like the comm chip has an internal short. Such shorts can be caused by static discharge, placing the reset jumper on the incorrect pins, temporary conduction on the card cause by contanimants, etc...Send us your shipping address and we will send you out a replacement chip.Best regards,BrianLight O Rama Support Team"
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