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Naomi Error 01

Take a normal Naomi game card and see if it plays oké if it does your card is dead. The buffer chips On the card are dead or someone already tinkerd with it
 
ah okay you did mean card as in cart

Yeah since I tested the cart on other mobos that work fine it's definitely the cart

Is there anyway to repair the buffer chips or is it a lost cause?
 
Na it’s a lost cause . Card is to cheap to tinker around with it. You can try a reflow but I think that’s out of your comfort zone

just google it
 
The buffers are electronic circuits which are there to protect the cart they sit across the address and data bus.

One more thing to try is to remove the PCB from the cart and then only insert the PCB into the NAOMI to rule out bad connections.
 
There are a bunch of old threads on KLOV about this that just say to replace the SMD buffers but nobody went into detail on what/how/part numbers really. Hopefully Ken can set your game straight.
 
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Hydreigon said:
This could be a likely replacement buffer: https://www.mouser.com/ProductDetail/Nexperia/74LVCH16245ADGV-QJ?qs=T8HDo%2BTk69UsCtErOTazMA==

Checked the datasheet of the product I linked and can confirm a near identical pinout. Speak of power, I would keep the Naomi power below 5.1 (I attempt keep all my Naomi related hardware voltages at 5v and 3.33v flat.
Click to expand...
Something is strange, the driver is only 16 bit and there is only 1 which goes to the connector the other goes to the EPROM ?
 
@GuileWinQuote one more thing to try is to measure the voltages at the test points on the cart while powered.

TP1, TP3, TP5, TP7 and TP9
 
Most likely the final update:

Got the game shipped over to Ken at IRepairSega, and he reached out to me today that he switched out chips and capacitors and still can't get the game running.

He said that during his time at Sega, that he had never seen the type of board that Subtle Style used for Akatsuki Blitzkampf (the game was released in 2008 by a very small team, which probably has something to do with it).
So he's at a loss as well.

Sucks that such a rare pcb couldn't be saved but at least I tried. Thanks to everyone who tried to troubleshoot with me. ;(
 
sad to hear that
GuileWinQuote said:
he had never seen the type of board that Subtle Style used for Akatsuki Blitzkampf
Click to expand...
strange, they are less common but not really rare, there was released 15 or so games on such type ROM boards.

in theory, if flash ROMs and security PIC is alive it may be saved, if use some other more common game (like Dynamite Deka) donor PCB, and put on it flash ROMs and PIC from your board. but, it expected to be not cheap...
 
Yeah these boards were used in more games then just that . So strange that he never seen it :-/

I’m from Amsterdam so not around the corner or I could have had a look for you and swap out some parts with working cards I have here
 
GuileWinQuote said:
Most likely the final update:

Got the game shipped over to Ken at IRepairSega, and he reached out to me today that he switched out chips and capacitors and still can't get the game running.

He said that during his time at Sega, that he had never seen the type of board that Subtle Style used for Akatsuki Blitzkampf (the game was released in 2008 by a very small team, which probably has something to do with it).
So he's at a loss as well.

Sucks that such a rare pcb couldn't be saved but at least I tried. Thanks to everyone who tried to troubleshoot with me. ;(
Click to expand...
Actually you can save this rare game, let Ken keep the PCB and then find another M4 PCB. Then send the new working M4 PCB to Ken and ask him to transplant the 4 NAND chips from your original broken cart over to the donor, you will also need to transplant the PIC chip :D
 
GuileWinQuote said:
Most likely the final update:

Got the game shipped over to Ken at IRepairSega, and he reached out to me today that he switched out chips and capacitors and still can't get the game running.

He said that during his time at Sega, that he had never seen the type of board that Subtle Style used for Akatsuki Blitzkampf (the game was released in 2008 by a very small team, which probably has something to do with it).
So he's at a loss as well.

Sucks that such a rare pcb couldn't be saved but at least I tried. Thanks to everyone who tried to troubleshoot with me. ;(
Click to expand...
Weird indeed (both the fact that he has never seen that type of board and that he switched out chips and capacitors, looks like shotgun repairing to me).
Anyway those boards are pretty simple and most chips can be replaced easily. The only killer is the Xilinx (I haven't even checked but I guess it's undumped).
 
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