F1J - Able to identify? - diyAudio
Go Back   Home > Forums > Amplifiers > Power Supplies

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 16th November 2011, 10:59 PM   #1
RichIOM is offline RichIOM  Isle of Man
diyAudio Member
 
Join Date: Nov 2011
Location: Peel
Default F1J - Able to identify?

I was wondering if someone can help me identify the following component:

Click the image to open in full size.

Not much to go on by the picture I know, but one side of it has blown off so I can't make out the markings on it.

One side does however read. F1J

I'm guessing it's a fuse resistor, possibly 0.1 ohm?

It's out of a blown PSU for a PC, but the PSU is a mini proprietary type for a Sony Vaio all in one computer, which are basically impossible to replace, as no where stocks the PSUs, and it seems such a waste.

I'm hoping just replacing this will fix the issue and it's not connected to some sort of short. Doing some research on these, appear to show that these PSU's failure rate was quite high, and no doubt all the same issue.

Thanks.
  Reply With Quote
Old 16th November 2011, 11:39 PM   #2
diyAudio Member
 
nigelwright7557's Avatar
 
Join Date: Apr 2008
Location: Carlisle, England
If the resistor has blown then there has to be a reason. Its highly unlikely it just blew up for no reason. Something is forcing too high a voltage into it. So there is another problem elsewhere.

You could use an external supply and feed the various voltages into the computer via short wires as a last resort.
  Reply With Quote
Old 17th November 2011, 08:26 AM   #3
RichIOM is offline RichIOM  Isle of Man
diyAudio Member
 
Join Date: Nov 2011
Location: Peel
I came across the following when researching reasons for something like this to happen.

So I guess I'll need to test the caps first, failing that presume it was a power surge or lightning strike?

"Supply dead, fuse blown - shorted switchmode power transistor and other semiconductors, open fusable resistors, other bad parts. Note: actual cause of failure may be power surge/brownout/lightning strikes, random failure, or primary side electrolytic capacitor(s) with greatly reduced capacity or entirely open - test them before powering up the repaired unit."
  Reply With Quote
Old 13th November 2012, 09:19 PM   #4
RichIOM is offline RichIOM  Isle of Man
diyAudio Member
 
Join Date: Nov 2011
Location: Peel
Sorry to resurrect but this item has remained in my attic for ages now.

Just wondering how I might be able to source a replacement component? I'm not able to identify exactly what it is other than the info I first supplied.

I agree the fault is likely to be something else, but it is possible that it could be power surge related.

I've read many people binning these PSU's because of failure and because they were of a design that a standard psu couldn't replace due to size constraints.

So I'd like to repair this one and get the PC working again.
  Reply With Quote
Old 17th November 2012, 08:32 PM   #5
diyAudio Member
 
payloadde's Avatar
 
Join Date: Mar 2008
F1J = 1Watt 5%
If you want to make any progress on that, it is necessary to investigate into the surroundings. I assume you have no circuit diagram.
But you could tell us to what other components it connects - this might give us a clue for an educated guess ...
__________________
Judge: This court appreciates that you invented physics, Mr.Newton, but unfortunately you can't have a patent on it.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
F1J for Audeze LCD-2 headphones? calvert73 Pass Labs 0 13th September 2011 06:16 PM
Firstwatt F1J Tea-Bag Pass Labs 96 16th August 2011 07:17 PM
Can anybody identify this costis_n Tubes / Valves 5 5th April 2010 12:48 AM
Help me identify the following please bail_w Chip Amps 4 29th September 2009 05:40 PM
Please help me identify this Lloyd1986 Subwoofers 5 26th January 2005 10:48 PM


New To Site? Need Help?

All times are GMT. The time now is 12:34 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2