Geeetech

ok anyone know who ya contact about this, i got 2 brand new geeetech gt2560 boards that are useless. hooked up right with the right connectors done to there color spec'ss on there wire diagram page. hooked up one fan it works , hook up the pwm fan and bam the board is dead so now i got 2 dead boards hmmmmmmmmmmmm.

hi,pwm fan should be connected to turbofan(cool down the filament rapidly).it's controled by g-code.the board is ok.

all fans are dead and stepper motors are running in slow motion no power is getting to any thing after plugging in more then 2 fans it blow d17 diode. each fan worked before bye it's self and then when all together it shorted out i use the right connector and not Dupont Connectors so there is no oopssss, either the diode is to week for the job or it is faulty from fan plugs to diode finding cat whiskers here and there on some of the circuits , the testing we have done on the boards. we jumper d17 chip to test, fans comes back to life but that diode is there for reason{ power out not in } , making it one bridge not a good idea from what i see people doing with this problem.

hi,the diode on the board could allow 1amperes of current flow.and each fan just need 110mA.you can move the diode and it do not affect the circuit.you can have a try.