|
Title: S+ MPU dead - cause and solution Post by: poppo 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.
Title: Re: S+ MPU dead - cause and solution Post by: FORDSBS on September 06, 2011, 04:59:52 PM :212-
Thanks, that's something we all should remember. Title: Re: S+ MPU dead - cause and solution Post by: Tilt 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.
(http://) Title: Re: S+ MPU dead - cause and solution Post by: Yoeddy1 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 Title: Re: S+ MPU dead - cause and solution Post by: FORDSBS on September 06, 2011, 06:28:50 PM I looked on EBay & did not find
Title: Re: S+ MPU dead - cause and solution Post by: poppo on September 06, 2011, 06:39:03 PM Here is one like pictured above.
http://www.all-spec.com/products/EX2.html (http://www.all-spec.com/products/EX2.html) Title: Re: S+ MPU dead - cause and solution Post by: CaptainHappy on September 06, 2011, 06:56:50 PM Poppo,
:209- Good eye! :244- CH :95- Title: Re: S+ MPU dead - cause and solution Post by: Tilt on September 06, 2011, 07:08:22 PM Here is one like pictured above. http://www.all-spec.com/products/EX2.html (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 (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 (http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=K158-ND) Title: Re: S+ MPU dead - cause and solution Post by: poppo 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. :72- Title: Re: S+ MPU dead - cause and solution Post by: FORDSBS on September 06, 2011, 07:43:57 PM :284- Poppo & Tilt. :259- to both
Title: Re: S+ MPU dead - cause and solution Post by: StatFreak 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. :3- :3- Stat :31- Title: Re: S+ MPU dead - cause and solution Post by: coorslight115 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 Title: Re: S+ MPU dead - cause and solution Post by: knagl 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.
Title: Re: S+ MPU dead - cause and solution Post by: StatFreak on September 06, 2011, 10:18:07 PM There are low profile ZIF sockets as well.
Title: Re: S+ MPU dead - cause and solution Post by: coorslight115 on September 06, 2011, 10:31:23 PM Never had a problem. I use the on my S+ boards as well..
Title: Re: S+ MPU dead - cause and solution Post by: coorslight115 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.
Title: Re: S+ MPU dead - cause and solution Post by: stayouttadabunker on September 06, 2011, 11:13:15 PM Here's some more links on the subject from like 2 years ago... :72- >>>
http://newlifegames.net/nlg/index.php?topic=2027.msg15057#msg15057 (http://newlifegames.net/nlg/index.php?topic=2027.msg15057#msg15057) Title: Re: S+ MPU dead - cause and solution Post by: poppo on September 06, 2011, 11:28:45 PM Years ago I posted about just plugging low profile ZIF into the existing sockets. Works fine.
|