https://forum.asrock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Thu, 30 Apr 2026 07:04:48 +0000 Sat, 25 Jul 2015 17:45:35 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 https://forum.asrock.com/RSS_post_feed.asp?TID=482 https://forum.asrock.com/forum_images/web_wiz_forums_black.png https://forum.asrock.com/ https://forum.asrock.com/forum_posts.asp?TID=482&PID=2314&title=need-smd-marking-information-on-z77-extre#2314 Author: ahnic
Subject: 482
Posted: 25 Jul 2015 at 5:45pm

Yeah you are right, they are most likely used to control the usb port current. I measure the resistance of it and it is basically open circuit whereas the other 4 normal  p260 fuse have zero ohm. My board is not working suddenly at all and it won't start up. May be due to other component failures but I can't see other burned components or broken traces. Anyway I will replace that broken fuse first and see how it works. Thanks again for your help.
]]> Sat, 25 Jul 2015 17:45:35 +0000 https://forum.asrock.com/forum_posts.asp?TID=482&PID=2314&title=need-smd-marking-information-on-z77-extre#2314 https://forum.asrock.com/forum_posts.asp?TID=482&PID=2308&title=need-smd-marking-information-on-z77-extre#2308 Author: parsec
Subject: 482
Posted: 25 Jul 2015 at 10:53am

Yes, the standard nomenclature used with circuit boards assigns 'F' to fuses, and 'R' to resistors.

This part resembles a power resistor, I would agree, but a fuse is in many ways similar.

The question becomes what is the purpose of that fuse, so you can track down whatever is being fused by that part, in case a failure of another component caused the fuse to blow.

I looked over my Z77 Extreme4 board, and found four more identical fuses, and they are exactly the same as the one you want to replace.

One can be found along the right edge of the board, about 7cm above the gray SATA port, just above Q749.

Another is in the upper left hand area of the board, about 4 cm above the VRM heat sink with "EXTREME" written on it.

The other two are close together just to the left of the same VRM heat sink I mentioned above.

IMO, it seems that all these fuses, including the one that is blown on your board, are for the power for the various USB headers and USB ports on the board.

The one that is blown on your board may have been caused by an overload of the power draw on the USB 2.0 ports connected to either USB _2_3, USB_4_5, or USB_6_7.

So your board is not working at all, it won't start up at all or what happens when you apply power?
]]> Sat, 25 Jul 2015 10:53:13 +0000 https://forum.asrock.com/forum_posts.asp?TID=482&PID=2308&title=need-smd-marking-information-on-z77-extre#2308 https://forum.asrock.com/forum_posts.asp?TID=482&PID=2304&title=need-smd-marking-information-on-z77-extre#2304 Author: ahnic
Subject: 482
Posted: 25 Jul 2015 at 8:34am

Great thanks for your help. According to the number 260, it may not be a resistor, it may be a resettable fuse.
]]> Sat, 25 Jul 2015 08:34:31 +0000 https://forum.asrock.com/forum_posts.asp?TID=482&PID=2304&title=need-smd-marking-information-on-z77-extre#2304 https://forum.asrock.com/forum_posts.asp?TID=482&PID=2295&title=need-smd-marking-information-on-z77-extre#2295 Author: parsec
Subject: 482
Posted: 25 Jul 2015 at 2:50am

I'm can't take a picture now, but I have a Z77 Extreme4 board in its box, so I can easily check it.

Using a magnifying glass, I can easily see the F5 part and its markings.

It has a 'P' on top, and the number is 260.

Triple checked, the number is 260.

Good luck with your repair!
]]> Sat, 25 Jul 2015 02:50:38 +0000 https://forum.asrock.com/forum_posts.asp?TID=482&PID=2295&title=need-smd-marking-information-on-z77-extre#2295 https://forum.asrock.com/forum_posts.asp?TID=482&PID=2292&title=need-smd-marking-information-on-z77-extre#2292 Author: ahnic
Subject: 482
Posted: 24 Jul 2015 at 11:47pm


Hi,

My z77 extreme 4 is not working, it seems that the surface mount resistor F5 gets burned and I need to replace it. Anyone could help me to check the marking of this surface mount component F5? Thank you very much in advance!



]]> Fri, 24 Jul 2015 23:47:27 +0000 https://forum.asrock.com/forum_posts.asp?TID=482&PID=2292&title=need-smd-marking-information-on-z77-extre#2292