420 blowing fuse

[rush]

hi guys trying for mounths to repaie this 420 now it has come to the point that the fuse is blown ,replace the 125 volt fuse pluged back in and again it blow has anyone come across this problem. the fuse iam referring to is the one that sits right by the cord any info would be greatly apperciated............

[skinerd]

You have a short, no doubt, if you need a schematic for this power supply I have one.....
very unusual for this fuse to blow, usually the power supply smokes first.

[bigstraw]

if you have a dmm check to see if there's a shorted diode in the power supply section, may or maynot be near fuse.

[rush]

bigstraw whats a dmm check.............

[rush]

skinerd i could sure use the schematic anything of the web seem to small to read.......

[bigstraw]

use a Digital Multimeter to check for a shorted diode, that's if you know a little electronics.

[rush]

bigstraw dont know much in electronic but i do know that a doid current must flow in one direction not both ways is this correct

[skinerd]

skinerd i could sure use the schematic anything of the web seem to small to read.......


I'll try to attach it here, it's a pdf file.

[rush]

thanks skinerd.........