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Mortal Kombat CMOS U49 BAD- Repair

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seanr28 View Drop Down
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Joined: 24 September 2014
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Post Options Post Options   Thanks (0) Thanks(0)   Quote seanr28 Quote  Post ReplyReply Direct Link To This Post Topic: Mortal Kombat CMOS U49 BAD- Repair
    Posted: 21 November 2017 at 10:54pm
This had an error on boot, Error - COS CHIP U49 BAD

20171001_164354 by [url=https://www.flickr.com/photos/149562394@N02/]

20171001_164350 by [url=https://www.flickr.com/photos/149562394@N02/]

So I managed to get some equivalent chips

20171121_220734 by [url=https://www.flickr.com/photos/149562394@N02/]


removed bad U49 Chip


20171121_220736 by [url=https://www.flickr.com/photos/149562394@N02/]

20171121_220647 by [url=https://www.flickr.com/photos/149562394@N02/]


Cleaned up, installed socket and fitted replacement chip


20171121_224253 by [url=https://www.flickr.com/photos/149562394@N02/]


now works perfectly

20171121_224304 by [url=https://www.flickr.com/photos/149562394@N02/]

A nice and easy fix:)





Edited by seanr28 - 21 November 2017 at 10:59pm
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pinball2016 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote pinball2016 Quote  Post ReplyReply Direct Link To This Post Posted: 22 November 2017 at 11:01am
Nice one sean Thumbs Up

I had same issue with T2 board, guessing its a common ram chip to fail on these midway boards. Glad its up and running for you and easy fix, those are the best ones!

Craig
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seanr28 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote seanr28 Quote  Post ReplyReply Direct Link To This Post Posted: 22 November 2017 at 6:24pm
it was your post about the T2, that made me give it ago:)
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