james.wilson Posted August 10, 2011 Share Posted August 10, 2011 the resistors wont be your problem. Unless the line is huge that is. What line are you connecting too as normally you would connect an ethernet module onto the headers of the data line. securitywarehouse Security Supplies from Security Warehouse Trade Members please contact us for your TSI vetted trade discount. Link to comment Share on other sites More sharing options...
GalaxyGuy Posted August 11, 2011 Share Posted August 11, 2011 the resistors wont be your problem. Unless the line is huge that is. What line are you connecting too as normally you would connect an ethernet module onto the headers of the data line. Line 1 and fitted in the panel from OP's diagram/info. I'm suspecting that there's a component on the PCB at fault which is drawing excessive current and dragging the post regulator voltage down. This would explain the excessive heat and dim LED on the board. By the sounds of it, this started out as an intermittent fault and has now gone hard. I can repair this, but as I said to the OP earlier, it probably wouldn't be cost effective to do so. Regards, Link to comment Share on other sites More sharing options...
DanielHole Posted August 12, 2011 Author Share Posted August 12, 2011 Thanks for the reply's it looks like its had it then ? can you point me in the right direction to try and repair the board ? Link to comment Share on other sites More sharing options...
james.wilson Posted August 12, 2011 Share Posted August 12, 2011 Be hard enough if it was infront of you muchless without seeing it at all. Personally I would attempt it unless it was an obvious dry joint etc. It needs assuming it is faulty sending back or binning. securitywarehouse Security Supplies from Security Warehouse Trade Members please contact us for your TSI vetted trade discount. Link to comment Share on other sites More sharing options...
GalaxyGuy Posted August 16, 2011 Share Posted August 16, 2011 Thanks for the reply's it looks like its had it then ? can you point me in the right direction to try and repair the board ? From your previous descriptions of excessive heat and dim LED's, it sounds like something has gone faulty and is drawing too much current. If a part on the board is drawing too much current, then attempting to locate this would be the first port of call. Measure the secondary voltage after the 3 pin voltage regulator. The regulator should be regulating the 12Vdc input voltage down to 5Vdc. If there's a faulty chip or low resistance somewhere on that secondary power rail, then the voltage is likely be lower. After that, it's down to basic fault finding techniques to isolate the problem. There are two programmable parts on the board. One is an 8 bit micro-controller and the other is an 8 pin SEEPROM. If it's one of these that's faulty, then you're probably going to struggle to get any replacement part programmed on your own. One of the problems that I see with boards like this being sold on Ebay is that many sellers don't realise that they're static sensitive devices. They wrap them up in standard bubble wrap, poly bags and the likes. Anyway, that's probably all I can offer on debugging this without specialist equipment. Good luck with getting it going again. Regards, Link to comment Share on other sites More sharing options...
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