Search results for query: *

I've been trying my hand at BGA rework, not Hikaru hardware but Naomi which is pretty similar. Modified Jovy 7500. Microscope camera to watch the chip drop into place. :D

Even if they thought it was a hack surely it should have been added to mame? half the roms in mame are hacks / bootlegs.

That Tito guy sure does like to wave his hands about.

Okay I was wrong they're a nightmare to remove due to the amount of pins that are connected to a very large ground plane. I managed to get one off in good shape but the rest were damaged anyway. I suggest not messing with your rom board if it works but if you still want it I've got a connector.

I had a look today, found the motherboard but not the rom board but getting closer.

Thank you, such a great project. :thumbup:

I'm using the one from this thread, compiling them is a bit beyond me. If you've got precompiled files I've love to try the tmnt one too. Thanks for the quick reply.

@ack great job on the test roms, I tried the Wrestlefest one I did notice the screen stays black on sprite ram test though. It does display when pressing button one but blink and you miss it, not sure if this is a bug? Would it be possible to add a rom test to test the graphics maskroms?

Thanks a lot, and yours is the same revision? -2?

Does anyone happen to have a 400-5397-01 Sun psu on hand they can check a resistor value for me? It's R18 next to the fuse, mine has rusted in half so I can no longer see the colour rings or read the value with a meter. I've marked on this picture where it is, if someone could tell me the value...

The desoldering station should make light work of it, just need to find the rom board.

I can harvest you a connector if that's all you need.

I replaced the 245s first. ^^

First you'll need to be able to flash tsop56 S29GL128 chips, I sourced the chips from aliexpress but mouser also has them. Then you'll need to order some flex pcbs from osh park, pcbway etc using the attached gerber files. This repair will require a microscope or a magnifying glass and some...

It's easy to miss old posts, I only found it and remembered it because I was looking for something similar (a diy tsop56 adapter).

https://www.arcade-projects.com/threads/mx26l6420-adapter-for-xgecu-t56-programmer.28314/

Replace the buffer on the bottom think it's a 16245 off the top of my head and the tsop flash chip with a known good one. If doesn't fix it that's likely game over, as it will be a bad bga connection on one of the custom chips or the chips themselves.

Doesn't matter I've drawn my own up in kicad now, it'll be released for free once it's confirmed working.

Funny how you post a no I won't help post followed by a post asking for help. I know the solution to the problem you're having with the 171-7978b conversion too, oh well.

I've had a graphics glitch issue like this on a Naomi 2, it was tricky to track down as all the rams passed. I ended up using freeze spray on the video rams one at a time until the glitch went away. The only issue was I replaced the ram and the issue didn't go away. Turned out the freeze spray...