i just got this less than a month ago from mdd0127 along with a pack it's to be used to charge, and the mini-limiter board (not yet installed then), and i've already done something to it to cause it to fail. i don't knwo what, yet, but it should be something simple.
i hadn't tried it out yet, so first i powered it on, got the green led, and 48.8v out across the main terminals. i can't remember if the fan spun up or not.
unplugged it and took the lid off to take pics and to prepare for installing the mini limter board.
next, i researched the right spot to tie the sense wire to from the mini limiter board, at the resistor end that gets 2.48v over by the voltage adjust pot. in at least one of the posts specifying this info, it calls that r25, but on mine it is r75 (EDIT: this is R73, I just can't read), with r55 right next to it. mine is a 1/8w resistor, rather than the 1/4w seen in photos i ran across, but it's in the same physical place and it's got the right voltage. so....
i can't quite get in there with the soldering iron and wire, so i ahve to take the pcb out to do it. unscrewed the pcb from case, and then the heatsink clamps from all three sets of components that mount to the case.
took pics as i got it apart, to note the poor assembly process it went thru, where they didn't even bother to do anything more than dab the paste on there, no spreading or anything. they appear to have just put a dollop on each point it would need it, then screw the stuff down hoping it'd spread out (it didn't, not enough). plus these really thick rubber thermal pads/bags around three of the five case-heatsinked parts. figured i'd worry about that later, once i decided how i'd use it.
soldered on the sense wire from the ml board, then reassembled the meanwell, including putting the lid back on. plugged it back into the wall, and nothing. no light, no voltage, no motorcars, not a single luxury.
i checked first for broken leads or bad solder joints, and found neither. i reflowed a few critical ones anyway, for any parts i'd touched/bent during disassembly or install of the sense wire. and removed the sense wire, to no avail.
my three hour tour of all the es threads i could find on meanwells later, and poking and probing it, i found that basically the ac side works all the way up to the first switching stage, and then i'm not apparently getting any switching. haven't figured out why, yet, and am just too tired to continue right now; i keep dropping the probes and tha'ts gonna fry something for sure if i do it on the board.
so, below will be pics i took before i broke it, and later more troubleshooting hwen i have time and energy. hopefully someone else has had this same problem and i just missed their solution to it in the threads.
i hadn't tried it out yet, so first i powered it on, got the green led, and 48.8v out across the main terminals. i can't remember if the fan spun up or not.
unplugged it and took the lid off to take pics and to prepare for installing the mini limter board.
next, i researched the right spot to tie the sense wire to from the mini limiter board, at the resistor end that gets 2.48v over by the voltage adjust pot. in at least one of the posts specifying this info, it calls that r25, but on mine it is r75 (EDIT: this is R73, I just can't read), with r55 right next to it. mine is a 1/8w resistor, rather than the 1/4w seen in photos i ran across, but it's in the same physical place and it's got the right voltage. so....
i can't quite get in there with the soldering iron and wire, so i ahve to take the pcb out to do it. unscrewed the pcb from case, and then the heatsink clamps from all three sets of components that mount to the case.
took pics as i got it apart, to note the poor assembly process it went thru, where they didn't even bother to do anything more than dab the paste on there, no spreading or anything. they appear to have just put a dollop on each point it would need it, then screw the stuff down hoping it'd spread out (it didn't, not enough). plus these really thick rubber thermal pads/bags around three of the five case-heatsinked parts. figured i'd worry about that later, once i decided how i'd use it.
soldered on the sense wire from the ml board, then reassembled the meanwell, including putting the lid back on. plugged it back into the wall, and nothing. no light, no voltage, no motorcars, not a single luxury.
i checked first for broken leads or bad solder joints, and found neither. i reflowed a few critical ones anyway, for any parts i'd touched/bent during disassembly or install of the sense wire. and removed the sense wire, to no avail.
my three hour tour of all the es threads i could find on meanwells later, and poking and probing it, i found that basically the ac side works all the way up to the first switching stage, and then i'm not apparently getting any switching. haven't figured out why, yet, and am just too tired to continue right now; i keep dropping the probes and tha'ts gonna fry something for sure if i do it on the board.
so, below will be pics i took before i broke it, and later more troubleshooting hwen i have time and energy. hopefully someone else has had this same problem and i just missed their solution to it in the threads.