Tatsujin Oh problem!

Dragon1952 · Post by **Dragon1952** » Thu Dec 13, 2007 5:57 pm

Gentlemen and ladies,

I bought a Toaplan TATSUJIN OH from Yahoo Japan and when I received it I am experiencing this problem, hope someone out there might have an idea what I can do to fix it.

PROBLEM: After I coin-up and start a 1 Player game, the ship appears and is unable to be moved by the controls and is in a continuous shooting state! The second player mode works fine and there is NO problem on that side. This has been tested in two different cabinets, a Sega City and a New Sega City and does it on both. As well no other games have this issue so deductively it is not a cabinet stuck button type issue.

Anyone else have this happen? If so what solved the problem?

i appreciate any help....

dpful · Post by **dpful** » Thu Dec 13, 2007 7:38 pm

You could follow the traces on the board itself from the input of button 1 as well as the control ground and see which microchips they lead to, or if there is a dirt blob or a cut somewhere. Carbon cunducts electricity so if there's any burns or pencil marks or something...

Stefan_L · Post by **Stefan_L** » Thu Dec 13, 2007 7:57 pm

One of my Tatsujin oh PCB has that problem and is caused by the "Jamma HK" wich is broken in the corner, i don't know wich version you have as there is two versions of that "Jamma HK" chip... the one i have is the super fragile peice of shit version... seen in the following pic: http://www.ym2149.com/arcade/pic/broken_jammahk.jpg (wich actually is a bigger version of my avatar

)

CIT · Post by **CIT** » Thu Dec 13, 2007 9:26 pm

Anybody know how you can change the region setting on a Truxton II/Tatsujin-Oh PCB?

robivy64 · Post by **robivy64** » Thu Dec 13, 2007 9:40 pm

My old board had the other chip, labelled "TOAPLAN"

Dragon1952 · Post by **Dragon1952** » Fri Dec 14, 2007 2:43 am

Stefan,
Apparrently, I have the board with the JAMMA HK chip. I have examined it and don't notice any problem but where and how would it show a crack?
The one in your picture looks identical to this one. I will try to generate a close-up picture and post it. I have yet to figure out posting pictures here but I do it all the time on your hobby forums.

dpful,
Also, this borad is very clean so I don't see anissue with dirt or carbon!

dpful · Post by **dpful** » Fri Dec 14, 2007 6:05 am

The chip could have cold solder joints (where the solder blob on the back of the board develops a tiny crack around the leg of the chip). Sometimes you can see those; the solder blob should make a very clean slope up to the post of the chips leg, if you can see a line between the two, it could be a crack.

If you carefully touch the pins and blobs with something metal (jumping a crack), then you can identify the cracks also.
Of course, the chip could be blown, but cracks are always more likely.

Plus, no draw all over the board with a pencil or put out your cigarettes on it

Dragon1952 · Post by **Dragon1952** » Fri Dec 14, 2007 6:22 am

Thanks, I will further check it closely for cold solder joints and resolder them all if neccessary!

Dragon1952 · Post by **Dragon1952** » Fri Dec 14, 2007 7:17 am

I resoldered anything that looked "cold-solder" suspect and also carefully looked over the entire solder side for any additional cold solder joints and tested and retested but NO luck! Damn! This board wasn't cheap either (by my poor standards) and I suppose I will keep trying since I hate for this to remain in this condition.

dpful · Post by **dpful** » Fri Dec 14, 2007 11:11 pm

it looks like that chip could have cold solder joints on the top also, what a pain in the ass. Gook luck.

Stefan_L · Post by **Stefan_L** » Sat Dec 15, 2007 7:28 pm

CIT wrote:Anybody know how you can change the region setting on a Truxton II/Tatsujin-Oh PCB?

It's changed by adding or removing resistors at JP1-4, i don't know exactly wich combination taht gives what except for Tatsujin Oh wich is having resistors on all JP1-4.

Stefan_L · Post by **Stefan_L** » Sat Dec 15, 2007 7:30 pm

Dragon1952 wrote:Stefan,
Apparrently, I have the board with the JAMMA HK chip. I have examined it and don't notice any problem but where and how would it show a crack?

On my PCB the crack (on the blue boardpart) is rounded so it's easy to see but if the crack just goes along the side of the top block then it could be very difficult to see.

Dragon1952 · Post by **Dragon1952** » Sat Dec 15, 2007 7:39 pm

Were you able to fix this problem on your board? I notice your exact problem now!

Stefan_L · Post by **Stefan_L** » Sat Dec 15, 2007 7:45 pm

No it's impossible... at least for me

But i have a working one also.

Stefan_L · Post by **Stefan_L** » Sat Dec 15, 2007 8:03 pm

Just a little correction... my other Tatsujin Oh PCB do also have a cracked Jamma-HK chip but it's only affecting player two... player one controls are all fine, so it's playable but with no twoplayer function.

Dragon1952 · Post by **Dragon1952** » Sat Dec 15, 2007 8:24 pm

Yeah, I can still play this as a one-player, but I have to switch to starting only the right side player two as a single player. I just wanted this to work as it should and for what I paid for.

CIT · Post by **CIT** » Sat Dec 15, 2007 8:29 pm

Stefan_L wrote:
CIT wrote:Anybody know how you can change the region setting on a Truxton II/Tatsujin-Oh PCB?
It's changed by adding or removing resistors at JP1-4, i don't know exactly wich combination taht gives what except for Tatsujin Oh wich is having resistors on all JP1-4.

Thanks! I was having a closer look at the PCB last night, and suspected that might be it.

In the test menu all the dip settings are listed, with region settings under "sw 3".

Do you happen to know off the bat what Ω those resistors need to have?

cools · Post by **cools** » Fri Jan 25, 2008 9:47 am

Dragon1952 wrote:Sega City and a New Sega City

Don't suppose you could supply some pictures of these cabinets? I know nothing about them

Dragon1952 · Post by **Dragon1952** » Fri Jan 25, 2008 4:29 pm

Here is the New Sega City cabinet!

The Sega City looks very much the same except where the speakers are, which are not protruding but are flush.

cools · Post by **cools** » Fri Jan 25, 2008 4:48 pm

Now I'm utterly confused. That's a Sega New Astro City. The one similar to that is a Sega Astro City.

The reason I asked is because there is apparently a Sega City too, but I've heard nothing else about it other than it exists! An owner would be a rare find

Dragon1952 · Post by **Dragon1952** » Sat Jan 26, 2008 6:34 pm

Is there anyone on this forum who could fix this problem without incurring tremendous expense?

shmups.system11.org

Tatsujin Oh problem!

Tatsujin Oh problem!

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