M1-ATX - Q2 part label - please help

cclass · 08-03-2005, 03:57 AM

My M1-ATX burned and I can't read text label on Q2 , which is burned. Can anybody please look at Q2 (beetle by the left side of ATX connector) and write me label of this part ?

Thanks. . .

neon_eddy · 08-03-2005, 07:19 AM

forgive me for my lazyness .. but I'm at work and can't go aout and look .. but by beetle do you mean .. the small black part with 4 connectors on each side..

if so mine ahs burned out twice .. yeah go figure, but I just pulled one off of an PW-70a I had laying around.. it's basicly a "mosfet power trench" .. not sure al lthat it does, but I'll sound stupid if I take a guess.

there is a little dimple on them that can help with aligning. And you only really need to worry about 2 of the leads.. the other 6 are just the same lead.. odd..

Power_nisse · 08-05-2005, 12:42 PM

what did you do to burn it?

if i may ask =)

Moneyfink · 08-05-2005, 12:56 PM

I did this, I know exactly what happened.

The Q2 is a pmos sensor that controls the 12 V rail. The M1-ATX is mean for processors that use 5V to power the processor. If you use a 12V processor it will draw too much on the 12 V line. Then this part burns up. Here are my emails with the mini-box people:

Quote:

I own a M1-ATX, and the component labeled Q2 keeps burning up. Can you
> tell
> me what this component does so that I can trouble shoot it. Also if you
> could send me a few of these components so that I can solder them on where
> the burnt up Q2 is. I will be willing to pay shipping and for the price of
> the Q2 components. Please send me a quote.
> -Drew
> fink.drew@gmail.com
> 513-319-3100
> m1-atx ordered from mp3car.com <http://mp3car.com>
>
------------------------------------------------------------------------

Q2 is a PMOS rated at 5A, FDS9453A. You are taking too much power from the
12V rail!
You could use a more powerful FET, FDS6679Z, but you will burn other things,
I think.

Try to reduce the 12V rail power consumption and you will be OK!

-Andrei

----------------------------------------------------------------------

So was I overloading the 90 Watt maximum that the PSU could handle? I have a 7200 Rpm HD (30.9W) , A 733 MHz Celeron (22.8 W), Motherboard (12.35 W), TouchScreen (2.5W), LCD (7 W), Keyboard (.25W), and 2mb videocard ( 4.15 W). This seems to be around 85 Watts, Wouldn't the PSU cut out instead of burn up. Do you think I wired something wrong? When you say "try to reduce the 12V rail power consumption it sounds like i might just be overloading the PSU.
Thank you for your help
drew

----------------------------------------------------------------------

The total powert consumption is less important than consumption on each rail. Looks like your 7200RM, LCD and video card consume from the 12V rail.
The offenders seem to be the 3.5" HDD and LCD. Hard drives consume a lot of power from the 12V rail at spinnup!

-Andrei
-----------------------------------------------------------------------
Can I purchase a few Spare PMOS, so that I can solder one in place of my burnt one? I will see if i can take some components off of the 12V rail. Is it possible to use 2 M1-ATX, and use one for my HDD and a few small things, and the other for my Processor and mobo and a few onboard components?
Thank you
- Show quoted text -

Drew
---------------------------------------------------------------------
Drew,

Please go to www.mouser.com and find the parts, they are really cheap.
As far as hooking up 2 M1-ATX in parallel, I would strongly suggest against doing that. -- this is a microprocessor controlled unit, you have 2 brains working at the same task, not a good idea.

-Andrei
------------------------------------------------------------------------
This is the last email I swear, Thank you so much for all your help though. When you said FDS9453A, did you mean FDS9435A, because this is the only thing that I found that came close to that part number? http://www.mouser.com/index.cfm?hand..._pcodeid=51229
Is that the part that I need?

------------------------------------------------------------------------
It is FDS9435A, sorry.

http://www.fairchildsemi.com/pf/FD/FDS9435A.html

I managed to repair mine and it was miracle of god. It took me over 2 hours to make the solders. I have now since moved onto an opus 150. If you look at my post history you might be able to find more info. I can post pics and tell you what to wire to what. anyway good luck and call me if you have any questions 513-319-3100 i'd love to help. If you **** up, i'll sell you my refurbished m1-atx for real cheap. what are you powering with you m1-atx?

Moneyfink · 08-05-2005, 12:57 PM

btw, I have a spare one, i bought a few extra ones to work with in case i messed up. If you want i can mail it to you, i can show you the oreintation and everyting

barb3tta · 08-06-2005, 04:33 AM

Hi all!
My q2 burned yesterday night...
I had the bad idea to connect LCD to the 12V of M1-ATX and... puff!!!
The strange thing is I have only the m9000,a slim DVD and the lcd to power... Is it too much???

I attached the lilliput to the M1-ATX 'cause the lilli dc-dc burned, too... And now I don't know where to attach it!!!

How did you solve this?

And is this failure covered by warranty? I'm not a soldering master, and I caused too many damage!

bye

Moneyfink · 08-06-2005, 08:44 AM

I had only soldered twice before when i fixed my Q2, Funny story Mine damaged after hooking up the lilli. Anyway, I got mine replaced the first time it did this, the second time i did it, i fixed it myslef

cclass · 08-07-2005, 01:11 AM

Quote: Originally Posted by Power_nisse

what did you do to burn it?

if i may ask =)

I burn it when connect lilliput 7" TFT to HDD power cable, but I have wrong made connector - plus and minus was changed. So my mistake not bad M1-ATX.

cclass · 08-07-2005, 01:14 AM

Thanks everybody,

thats the label I want - FDS9435A .

Do it myself is much cheaper as overseas charges from europe when to send supply for warranty.