Damaged motherboard

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Damaged motherboard

Postby » Tue Jun 10, 2003 5:14

I have revived a fsc oem board P5F79 (witha little help from Binary) and its been running fine for a few months. Then one day it just popped out, smoked. I did some troubleshooting and found out a regulator was burned - P30N03A. The problem is i dont know what this is and cant find anything online - datasheet, cross reference, nothing. Is there somebody who can help me here?

Re: Damaged motherboard

Postby » Tue Jun 10, 2003 9:31

Is there some marking on the part? Or can you post a picture of it and it's surroundings? <P>How do you know it's bad? Is it burnt? Are the Electrolyte Capacitors around it OK (eg. not cracked, leaking, bloated/swollen)?<P>Also it might be that not only this part is bad, others might have been damaged, too.

Re: Damaged motherboard

Postby » Wed Jun 11, 2003 1:01

Burnt like the center leg came off almost burned pattern too. Three pcs 6.3V/1000uF electrolytic capacitors popped out too. I replaced them already. Other components (cpu, ram, v/c, s/c) are ok. I tested these on my other board, a Redfox agp-ali socket 7.<BR>I can send you picture if you send me an email address

Re: Damaged motherboard

Postby » Wed Jun 11, 2003 15:46

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Hawke:<BR><B>Three pcs 6.3V/1000uF electrolytic capacitors popped out too.</B><HR></BLOCKQUOTE><P>Hmmm ... are you sure the caps popped the same time as the regulator? Or maybe they have been bad long before?<P>Send me the pic, please:<P>fscforum.20.juggernaut@spamgourmet.com

Re: Damaged motherboard

Postby » Fri Jun 13, 2003 10:42

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Juggernaut:<BR><B> Hmmm ... are you sure the caps popped the same time as the regulator? Or maybe they have been bad long before?<P>Send me the pic, please:<P></B><HR></BLOCKQUOTE><P>That I'm not sure... I'm sending the pix right now. I failed to mention that there are two P30N03A and that only one got busted. There's also a MOSPEC S16C40C in the middle of the two. Hope this helps!

Juggernaut
Posts: 1233
Joined: Wed Jun 11, 2003 0:01

Re: Damaged motherboard

Postby Juggernaut » Fri Jun 13, 2003 14:21

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Hawke:<BR><B> That I'm not sure... I'm sending the pix right now. I failed to mention that there are two P30N03A and that only one got busted. There's also a MOSPEC S16C40C in the middle of the two. Hope this helps!</B><HR></BLOCKQUOTE><P>OK thanks for the mail, this describes it quite detailed.<P>Well, it seems to be parts of the CPU Voltage Regulator - but I guess you figured that out already ;-)<P>It seems that the whole name is "MIP30N03A" and that it was manufactured by "MegaMOS".<P>Google turned out the following: <BR>"P30N03A - see RFP70N03" ... so this is a Power MOSFET. Unfortunately Fairchild doesn't have the PDF any more: <A HREF="http://www.fairchildsemi.com/ds/RF/RFP70N03.pdf" TARGET=_blank>http://www.fairchildsemi.com/ds/RF/RFP70N03.pdf</A> <P>But Google's Cache still has it: <A HREF="http://www.google.de/search?q=cache:cKa4WBIFheMJ:www.fairchildsemi.com/ds/RF/RFP70N03.pdf+&hl=de&ie=UTF-8" TARGET=_blank>http://www.google.de/search?q=cache:cKa4WBIFheMJ:www.fairchildsemi.com/ds/RF/RFP70N03.pdf+&hl=de&ie=UTF-8</A> <P>So this is a "70A, 30V, 0.010 Ohm, N-Channel Power MOSFET" in the packaging form "TO-220AB".<P>So I guess the "MIP30N03A" is a 30A, 30V N-Channel MOSFET with 0.01 to 0.02 Ohms...<P>Hopefully this helps, but if not then I'll ask someone on tuesday who knows about these things.

Re: Damaged motherboard

Postby » Mon Jun 16, 2003 1:01

Great, thanks! I'll do some tinkering for a while, post the results later

Re: Damaged motherboard

Postby » Sat Jun 28, 2003 0:09

I'm now running win98se and no problem so far. I'm still not sure what caused the problem in the first place, could be parts failure, anybody have a guess? System config: P200 MMX (couldn't find 233 MMX), 128MB SDRAM, Maxtor 10GB HD, S3 Trio 3d/2X v/c, Creative Vibra 128 s/c, 16X CDROM. I use it for playing MP3's since I have 2 other PC's: K6-2 450MHz on REdfox AGP-ALI, and Athlon XP 1700+ on ECS K7S5A. I used <A HREF="http://www.fairchildsemi.com/ds/RF/RFP30N06LE.pdf" TARGET=_blank>http://www.fairchildsemi.com/ds/RF/RFP30N06LE.pdf</A>

Juggernaut
Posts: 1233
Joined: Wed Jun 11, 2003 0:01

Re: Damaged motherboard

Postby Juggernaut » Sun Jun 29, 2003 21:20

Glad you got it working again!<P>Wow, you got some impressive mainboards there. The cream de la cream of cheap manufacturers LOL

Re: Damaged motherboard

Postby » Wed Jul 02, 2003 5:18

Thanks, couldn't have done it without you!


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