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Author Topic: S+ MPU dead - cause and solution  (Read 10581 times)
poppo
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« on: September 06, 2011, 04:55:31 PM »

I received a S+ MPU for repair. It would not boot (totally dead). The problem was caused by a screwdriver being slid under the CMOS socket instead of the chip when trying to remove it. This severed the CMOS power trace (see arrow on picture 1). Installed a jumper on the back of the board and the board functions fine.


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* mpu2.jpg (267.09 KB, 972x786 - viewed 373 times.)
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FORDSBS
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PET


« Reply #1 on: September 06, 2011, 04:59:52 PM »

 Agree with Post
Thanks, that's something we all should  remember.
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Tilt
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« Reply #2 on: September 06, 2011, 05:29:20 PM »

Nice work Poppo.  I cringe when I see stuff like that.  Using the right tool for the job would have prevented it.  A screwdriver, bent or otherwise, is not a good tool to use for removing IC's and often leads to bent/broken pins too.  Here's what you need to remove them, cost about $20.00.







* IC Extractor.jpg (16.81 KB, 200x200 - viewed 634 times.)
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Yoeddy1
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« Reply #3 on: September 06, 2011, 06:26:53 PM »

Tilt, where can those be had?  You guys would die if you saw the condition of my my massacred SB socket on my S2000 MPU.  I'm always careful to make sure that the bent screwdriver is under the EPROM and not the socket, but switching kits in and out abuses the plastic on that socket.

Jason
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FORDSBS
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« Reply #4 on: September 06, 2011, 06:28:50 PM »

I looked on EBay & did not find
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poppo
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« Reply #5 on: September 06, 2011, 06:39:03 PM »

Here is one like pictured above.

http://www.all-spec.com/products/EX2.html
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CaptainHappy
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« Reply #6 on: September 06, 2011, 06:56:50 PM »

Poppo,

 Sherlock Smiley Good eye! Clap

CH CaptainHappy
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Tilt
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« Reply #7 on: September 06, 2011, 07:08:22 PM »

Here is one like pictured above.

http://www.all-spec.com/products/EX2.html



And here's links to Digikey and Mouser too.

Mouser:

http://www.mouser.com/ProductDetail/OK-Industries/EX-2/?qs=sGAEpiMZZMuqHt7hmXVVHuBWGzdwIvLQHKpcdYcYH8g%3d

Digikey:

http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=K158-ND

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poppo
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« Reply #8 on: September 06, 2011, 07:38:18 PM »

A screwdriver, bent or otherwise, is not a good tool to use for removing IC's and often leads to bent/broken pins too.

True, but no way I'm retiring my universal extractor.  rotflmao





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FORDSBS
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PET


« Reply #9 on: September 06, 2011, 07:43:57 PM »

 Thanks Poppo & Tilt.   +1 (Karma, or whatever) to both
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StatFreak
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« Reply #10 on: September 06, 2011, 08:58:44 PM »

I've been plugging the EX2 on this site for years, but every time I post, someone inevitably responds that it's too expensive and that the PLCC extractor (WRONG TOOL) or a bent screwdriver will do just as well (which they won't unless you're very practiced at using them for the wrong job.)

Tilt, you can officially take over promoting the EX2 on NLG. applause applause


Stat garfield
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coorslight115
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« Reply #11 on: September 06, 2011, 09:18:00 PM »

Tilt, where can those be had?  You guys would die if you saw the condition of my my massacred SB socket on my S2000 MPU.  I'm always careful to make sure that the bent screwdriver is under the EPROM and not the socket, but switching kits in and out abuses the plastic on that socket.

Jason

Jason ...You need to do what I did...Use a ZIFF socket! ( Yes I know it is big ..but it works great!!)

I have extras if interested. $5 each  PM me


* IMG_1388.JPG (1321.2 KB, 1600x1200 - viewed 393 times.)

* IMG_1389.JPG (1148.23 KB, 1600x1200 - viewed 366 times.)
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knagl
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« Reply #12 on: September 06, 2011, 09:49:43 PM »

I bought some of those chunky green ZIF sockets off of eBay for my S+ -- the pins were sideways from what I needed.  I twisted each one with a pliers until they were all facing the right way, then put it in my MPU board and made sure that every pin was seated correctly.  It killed the board.  It wouldn't work after that, even with the ZIFs removed.  I love the idea of them, but I'm deathly afraid of putting them in any of my boards, especially the more expensive S2000 or Game King boards, after my bad experience.
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« Reply #13 on: September 06, 2011, 10:18:07 PM »

There are low profile ZIF sockets as well.
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coorslight115
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« Reply #14 on: September 06, 2011, 10:31:23 PM »

Never had a problem. I use the on my S+ boards as well..


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coorslight115
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« Reply #15 on: September 06, 2011, 10:33:16 PM »

Low profile are available...but cost more. These did not need any mods. plugged right in as is.


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stayouttadabunker
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« Reply #16 on: September 06, 2011, 11:13:15 PM »

Here's some more links on the subject from like 2 years ago... rotflmao >>>


http://newlifegames.net/nlg/index.php?topic=2027.msg15057#msg15057
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poppo
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« Reply #17 on: September 06, 2011, 11:28:45 PM »

Years ago I posted about just plugging low profile ZIF into the existing sockets. Works fine.



* zif.jpg (484.74 KB, 768x512 - viewed 360 times.)
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