dogcow Posted June 27, 2012 Share Posted June 27, 2012 i have a united crane board which is having problems i think it is due to the contacts on the edge connectors being worn off. any idea what to do about fixing this or should i send it in for repair? Link to comment Share on other sites More sharing options...
Billnuts Posted June 27, 2012 Share Posted June 27, 2012 well, there is a way use a eraser on the male part (the gold contacts on the motherboard the female harness can be redone with a little time, and the right tools you will need a few sewing needles and micro screwdrivers and small files the gold contacts inside can become flat ___ you need them to be curved again ( first clean them with the small file to get rid of corrosion and dirt second use the needle and the small screwdriver to bend each one carefully back to a ( curved shape takes a while to do each one.. the female connectors can be replaced with a new jamma harness by butchering the harness and replacing with a jamma harness you may have to cut to size and then re-wire each wire eather way its the same about of time bill Link to comment Share on other sites More sharing options...
dogcow Posted June 27, 2012 Author Share Posted June 27, 2012 the contacts in the cable are fine i swapped the motherboard and it appears to be working. maybe it is something else with the old board i dont know. do you know offhand how much voltage is supposed to be going to the board. I was told 5.4v measured from the chip next to bank 2 the lower left pin to the upper right pin, but i notice on the board there is a little contact marked "5.25v measurement point" however idk what to do with that...any idea? Link to comment Share on other sites More sharing options...
Billnuts Posted June 27, 2012 Share Posted June 27, 2012 5 volt to 5.5 is adjustable via the power supply higher voltage 5.4 is to offset current draw the chips and internal regualtors should compinsate for the minor voltage increase thats just a test point to make sure you have 5v if you have 5v there everything before that point is working ok.. check your 12volt inputs and check for cold solders 12volt can go from 12v to 13 volt test that under a load sometimes power supplys are funky under load I dont think thats where the problem lies check all connectors for cold solders or loose solders whats it doing / not doing? Link to comment Share on other sites More sharing options...
dogcow Posted June 28, 2012 Author Share Posted June 28, 2012 5 volt to 5.5 is adjustable via the power supply higher voltage 5.4 is to offset current draw the chips and internal regualtors should compinsate for the minor voltage increase thats just a test point to make sure you have 5v if you have 5v there everything before that point is working ok.. check your 12volt inputs and check for cold solders 12volt can go from 12v to 13 volt test that under a load sometimes power supplys are funky under load I dont think thats where the problem lies check all connectors for cold solders or loose solders whats it doing / not doing? after the boot up sequence , it homes then anywhere between a few seconds to a few minutes it will go through the power up sequence again. The power supply is brand new when I bought the unit it had a bad ps Link to comment Share on other sites More sharing options...
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