What would be burning up those diodes? Incorrect wiring to the drive? Leaking electrolytics?
In my limited experience, diodes usually don't fail for no reason. Dave On 2/10/2015 12:53 PM, Jon Elson wrote: > On 02/09/2015 10:43 PM, Dean Posekany wrote: >> After the comments/recommendations to think about attempting a repair to >> the Parker drives, I popped several open and took a good look around. On >> the top surface I could find no obvious problems. Not popped caps, no >> burn marks, nothing. On the bottom, I found what looks to be a problem >> on two of the bad drives. There are three SMD's located near the drive >> output port that appear to be toast. The problem is I can't identify >> them. The board stencil “CR” notation seems to indicate they are crystal >> rectifiers and you can see polarity marks on one side. I tried to track >> down the SMD codes online but had no success. Soooooooo, since some of >> you spurred me on, I thought I'd throw this back out here to see if any >> of you guys had any ideas. I've attached links to three photos that may >> be of some help. >> >> This is a close-up of one of my good drives: >> >> _https://www.dropbox.com/sc/fzugl3ebp7hlbbj/AABZSMn6f70FORZS3FpRhRc-a_ > The markings appear to be CU02 then on next line M ON. > The CU02M shows up as a CMR1U-02M, available from Digi-Key. > 200V 1A, 35ns reverse recovery time. > > > Jon > > ------------------------------------------------------------------------------ > Dive into the World of Parallel Programming. The Go Parallel Website, > sponsored by Intel and developed in partnership with Slashdot Media, is your > hub for all things parallel software development, from weekly thought > leadership blogs to news, videos, case studies, tutorials and more. Take a > look and join the conversation now. http://goparallel.sourceforge.net/ > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com ------------------------------------------------------------------------------ Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
