Merry Christmas all
OK, started working on the electronics, as they arrived yesterday.
Cut the wires for the 12V rail on the ATX power supply, then connected the green & black terminals on the 24pin plug and turned it on to check they had made a good connection. Fan turned on, was happy, so I turned it off again. Was on for maybe 2 sec.
Soldered the live and ground cables into their groups (also modified one of the MOLEX cables to connect to the 5A connection on the RAMPS)/ Thought I would check continuity before putting it live- and there is continuity between the live and earth wires!! Disconnected the green/black bridge but it is still earthed. cut all the cables again so they werent touching, then checked live/ earth again and there was still continuity. About 150-250 ohm resistance on the multimeter. Pretty sure thats not the way its meant to be so I thought I would check here before possibly frying my ATX.
Any thoughts? Or am I just being paranoid? Or have I already ruined it? Didnt smell any thing, or see any smoke. Looking through the grill on the side, there is some white stuff that seems to have leaked out of 2 of the toroids I can see. (though on opening the case it seems to be in other places on the board so might be an adhesive/ epoxy/ sealant type thing)
*Edit* - did another check, this time on wires of the same rail (ie 12V live to12V live), and there was only 5-9 ohms. So maybe it IS meant to be that way?
Cheers for any advice
OK, started working on the electronics, as they arrived yesterday.
Cut the wires for the 12V rail on the ATX power supply, then connected the green & black terminals on the 24pin plug and turned it on to check they had made a good connection. Fan turned on, was happy, so I turned it off again. Was on for maybe 2 sec.
Soldered the live and ground cables into their groups (also modified one of the MOLEX cables to connect to the 5A connection on the RAMPS)/ Thought I would check continuity before putting it live- and there is continuity between the live and earth wires!! Disconnected the green/black bridge but it is still earthed. cut all the cables again so they werent touching, then checked live/ earth again and there was still continuity. About 150-250 ohm resistance on the multimeter. Pretty sure thats not the way its meant to be so I thought I would check here before possibly frying my ATX.
Any thoughts? Or am I just being paranoid? Or have I already ruined it? Didnt smell any thing, or see any smoke. Looking through the grill on the side, there is some white stuff that seems to have leaked out of 2 of the toroids I can see. (though on opening the case it seems to be in other places on the board so might be an adhesive/ epoxy/ sealant type thing)
*Edit* - did another check, this time on wires of the same rail (ie 12V live to12V live), and there was only 5-9 ohms. So maybe it IS meant to be that way?
Cheers for any advice