SK16 Diode for replacement - Page 1
Forum section: electronics / beginners

author: Gakex
author_rank: Contributor
timestamp: January 14, 2013, 05:41:43 am
content: Hello im working on a printer the Epson L200 and i found a diode in short, I try to found the same diode in my town and didn't find it, my question is wat diode should i use for replace it.the diode is a smd SK16thank you.

author: Skimask
author_rank: Super Contributor
timestamp: January 14, 2013, 06:09:37 am
content: http://www.digikey.com/scripts/dksearch/dksus.dll?FV=fff40015%2Cfff8007f%2C40014d%2C4001ec%2C400389%2C4028fc%2C40385e%2C1140003%2C1800018%2C23c00eb%2Cb3800d1%2Cb3800d9%2Cb3800df%2Cb3800e3%2Cb380159%2Ce48000e%2Ce480012%2Ce480013%2Ce500001%2Ce500012%2Ce500013%2Ce500015%2Ce500018%2Ce500019%2Ce50001b&k=diodes&vendor=0&mnonly=0&newproducts=0&ptm=0&fid=0&quantity=0&PV1291=1670&stock=1Simple...relatively...Pull up the SK16 datasheet.Go to Digikey or any other electronic part supplier.Drill down the list until you get to something you can get.Basically anything in a DO214 package, rated at 60V reverse, 1 amp forward, fast recovery, and so on.The link above is not an exhaustive list and I'm sure anything you get your hands on that'll handle 60V reverse will likely do just fine.Heck, I'd take a 1N5820 or whatever I had on hand, solder it in there and see what happens.

author: Kremmen
author_rank: Super Contributor
timestamp: January 14, 2013, 07:14:32 am
content: That should work. In addition i would give a thought to why the diode failed in the first place? It didn't do so without a cause. So, was it defective from the start, or was it subjected to overvoltage or current? If the latter, then something else might have failed or there is a problem with the circuit in the first place either underdimendioned components or lacking protection features.

author: Skimask
author_rank: Super Contributor
timestamp: January 14, 2013, 09:31:45 am
content: Sometimes it just bad luck, plain and simple. You got a diode on the edge of the tolerance and a bunch of other components on the other edge of their tolerances. Who knows...Get one, put it in there. It either works or it don't. If it doesn't, you're not out anything...well not much anyways...

author: Kremmen
author_rank: Super Contributor
timestamp: January 14, 2013, 09:50:26 am
content: "Luck" should not be a word in the engineer's vocabulary %-B. There is no such thing as "bad luck", there is only bad design. Of course you can hit a defective component and that can be called bad luck, but to design on purpose on the edge of tolerances is not luck, it is a recipe for eventual failure. And a needless one as well established methods exist to estimate and evaluate impact of tolerance variations on the design. But then, not everyone bothers. And of course in these days of planned obsolescence sometimes failure is the design target.Of course it all depends. Buy a bargain gizmo from DX and you are guaranteed to get "luck" in the deal - usually the bad kind. Design something like the primary coolant circuit or fuel rod manipulators for a nuclear reactor and the word "luck" is one you hear seldom if at all.

author: Skimask
author_rank: Super Contributor
timestamp: January 14, 2013, 10:13:31 am
content: True, but it's a printer, and an Epson printer at that.One question I've got is if the O/P removed the diode first the verify it was actually shorted, and not just another component on the PCB making the O/P assume it is actually shorted...

author: Mechatrommer
author_rank: Super Contributor
timestamp: January 14, 2013, 12:45:23 pm
content: Quote from: Kremmen on January 14, 2013, 09:50:26 ami think retracing (rev-eng) it is also not an engineer's interest. i might be wrong.

author: Gakex
author_rank: Contributor
timestamp: January 15, 2013, 08:51:41 am
content: Im using a M7 diode and now is workin or at least now the ting can power on, since is a multi function printer/scaner I tested all in the normal functions, the scaner works fine, the printer apear to works fine but did't print anyting I mean the colors are moving but they dont relace anyting and the paper came out in blank...well now it just as before the M7 it seems that somting is wrong after or before the DIODE I'll try to find out what is bad with this board.there is only one diference that wen I plug in the power cable the panel leds turns on a litle bit.

author: amyk
author_rank: Super Contributor
timestamp: January 15, 2013, 12:28:24 pm
content: Quote from: Gakex on January 15, 2013, 08:51:41 amCheck the obvious first: did you plug the printhead connector back in?Epson inkjets are known for printheads drying out and clogging when left exposed to the atmosphere for some time (it is supposed to dry after all --- it's ink.) Searching the Internet and you'll find plenty of directions on how to unclog them...Incidentally here is an interesting teardown of a Canon printhead --- some of the photomicrographs look like chip images:http://www.nifty-stuff.com/forum/viewtopic.php?id=241&p=11

author: SeanB
author_rank: Super Contributor
timestamp: January 15, 2013, 03:07:46 pm
content: Printheads are mostly silicon on most inkjet printers.

author: Gakex
author_rank: Contributor
timestamp: January 16, 2013, 03:30:40 am
content: QuoteI was tinking in the printhead connector but i plugged it well and I'm gessing that it must bee an electronical problem because the printhead conector is near to the defective diode wich is near a IC i tink is the one that does the printer job.

author: junardz1224
author_rank: Newbie
timestamp: October 11, 2013, 03:38:17 am
content: greetings! i have same problem w/ epson L100 printer and i have SB160 diode on the board. Is this same problem w/ epson L200 printer and can i replace it w/ the replacement diode given on the internet? can you help me w/ this i have basic knowledge in electronics.