luk1 Posted June 3, 2010 Report Share Posted June 3, 2010 Hi, i have a problem with one element on PCB of the base of iRobot Roomba 560 (picture of the part of the scheme is here , specifically D15, D16, marked as ME 71. Can anybody tell which company is a manufacturer of it, and what is it (diode may be)? Also , if anybody knows where to get the spec for this element (or similar 812 ME, it was on the same position but in another device), i would appreciate it very much!Thanks! http://static.electro-tech-online.com/imgcache/1772-irobot%20roomba%20base%20scheme%20-%20ME%2071%20element.jpg Quote Link to comment Share on other sites More sharing options...
luk1 Posted June 3, 2010 Author Report Share Posted June 3, 2010 Looks like General semiconductor logo to me. But no ME 71 on their site. Quote Link to comment Share on other sites More sharing options...
luk1 Posted June 5, 2010 Author Report Share Posted June 5, 2010 Here is better image of the same element ( i got another camera which makes better macro), please if somebody can recognize the manufacturer of the D15 diode by logo , let me know which company is it! Quote Link to comment Share on other sites More sharing options...
Hero999 Posted June 6, 2010 Report Share Posted June 6, 2010 Yes it's a diode, it's not marked so it's impossible to know the manufacturer or part number.It probably isn't important and it can be replaced with a diode with a high enough current rating. The trouble is you don't know what the current rating is either. My advice is, try replacing it with a Schottky diode in the same package wich as high a current rating as you can find.How do you know that the diode is the only component which is damaged? You don't, even if you do replace it with an adequately rated diode, it still might not work. Quote Link to comment Share on other sites More sharing options...
luk1 Posted June 6, 2010 Author Report Share Posted June 6, 2010 Yes, Hero999, you right, i don't know for sure that this is the inly broken element. But this is my best bet so far, at least change this element, which is obviously broken :-) Problem is i don't have any idea about current rating of this element, will have to make some research about highest available. Are there some general rules about SMD diodes marking? Quote Link to comment Share on other sites More sharing options...
indulis Posted June 7, 2010 Report Share Posted June 7, 2010 Yup... it a General Semiconductor (bought by Vishay I think).It could also be a zener or a transient suppressor... Quote Link to comment Share on other sites More sharing options...
luk1 Posted June 8, 2010 Author Report Share Posted June 8, 2010 So far i put there instead of ME 71 another diode with similar package size (again, i'm not sure which one! It has one blue line on anode side, but no letters or numbers). The device works :-) Those SMD elements seems to be very difficult to identify :-( I can't find this ME 71 on Vishay site. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.