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Nemesis pcb

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Shinydaz View Drop Down
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    Posted: 19 Aug 2017 at 2:55am
I took a gamble buying this board, as it hadn't been running for nearly 20 years, but it looks in great condition.

Upon hooking it up to my jamma rig, sadly it didn't boot.





After probing the 68000, checking roms, enables etc..
I thought I may aswell attack some of the fajitsu's
After 2 hours on the cpu board, I was happy all is well on there, so I flipped it over and started on the fajitsu's on the lower board, one was bound to be bad right?

74LS04 at F13 was a simple inverter chip, so basically it flips the input from high to low or low to high on the output.



2 of the output pins were stuck and 1 was just showing nothing, so it looks like I found a bad chip. Popped a donor chip in (Never replace with fajitsu's) and to my amazement it booted straight up.





There is still no sound yet but I'm just happy it's living again, it's an awesome game.


Edited by Shinydaz - 20 Aug 2017 at 3:04pm
Hunting for a pole position !!
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Shinydaz View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Shinydaz Quote  Post ReplyReply Direct Link To This Post Posted: 20 Aug 2017 at 2:10pm
Replaced the 3 caps around the sound section to restore the sound.
Hunting for a pole position !!
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Purity View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Purity Quote  Post ReplyReply Direct Link To This Post Posted: 20 Aug 2017 at 2:34pm
Nice work fella, you seem to make repairs look easy :-)
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Shinydaz View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Shinydaz Quote  Post ReplyReply Direct Link To This Post Posted: 20 Aug 2017 at 3:03pm
Learning every day Ben, need to get more equipment though, I seriously need a soldering iron upgrade, maybe a hakko. The sale of this board will hopefully go towards some bits.
Hunting for a pole position !!
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Del Griffith View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Del Griffith Quote  Post ReplyReply Direct Link To This Post Posted: 20 Aug 2017 at 3:25pm
Nice work and a great game
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Shinydaz View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Shinydaz Quote  Post ReplyReply Direct Link To This Post Posted: 20 Aug 2017 at 5:44pm
It's a fantasic game and now fully working, just need a value on it now, see if my hard work has paid off.

Hunting for a pole position !!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ZXSTfm Quote  Post ReplyReply Direct Link To This Post Posted: 20 Aug 2017 at 5:49pm
Originally posted by Shinydaz Shinydaz wrote:

It's a fantasic game and now fully working, just need a value on it now, see if my hard work has paid off.



Nice fix for a great game. Well done :)

These go for silly money now. Depends on whether it's a conversion from Konami GT or an original with the correct labels.

Originals goes for over £1k in Japan haha!

I've seen corroded obviously none working go for daft money on ebay......
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Shinydaz View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Shinydaz Quote  Post ReplyReply Direct Link To This Post Posted: 20 Aug 2017 at 6:01pm




Looks genuine to me.

Edited by Shinydaz - 20 Aug 2017 at 6:01pm
Hunting for a pole position !!
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