DOJ dies, people cry, buy better games instead :awe:

PCB problems and fixes
VectorGlow
Posts: 502
Joined: November 8th, 2008, 11:40 pm
Location: Wales, UK
eBay: realflight

Re: I don't f*cking believe this, my DOJ is dead.

Post by VectorGlow »

Thanks, should be possible to fix it.
Arcade game board repairer
User avatar
Catzoo
Please Continue...
Posts: 59
Joined: July 6th, 2009, 4:36 pm
Location:

Re: I don't f*cking believe this, my DOJ is dead.

Post by Catzoo »

I don't really understand why everyone is telling me to remove that battery. Yes , it can break the board , but it seems that everyone here is having problem a few months after removing the battery ...

Anyone here have a working Ketsui or DOJ board after removing this battery for a long time ? Is there somewhere on the internet where i could buy a new one ?
User avatar
Xenepp

Re: I don't f*cking believe this, my DOJ is dead.

Post by Xenepp »

That thing on the right there is a resistor array and is faulty clearly, it appears to have spread to the other one too. It's a fairly common part so at least that's fixable, has the corrosion spread since then? Could be a reason why your board isn't booting.
User avatar
Catzoo
Please Continue...
Posts: 59
Joined: July 6th, 2009, 4:36 pm
Location:

Re: I don't f*cking believe this, my DOJ is dead.

Post by Catzoo »

Oh , last thing that i forgot , my PCB is still booting on Freeplay , No continu.

Does that mean that , even leaking a bit , the battery is still working ? oO
User avatar
Drakon
Please Continue...
Posts: 263
Joined: December 19th, 2008, 3:15 am
Location: toronto canada

Re: I don't f*cking believe this, my DOJ is dead.

Post by Drakon »

wow....needle should be able to help out with that
VectorGlow
Posts: 502
Joined: November 8th, 2008, 11:40 pm
Location: Wales, UK
eBay: realflight

Re: I don't f*cking believe this, my DOJ is dead.

Post by VectorGlow »

Catzoo wrote:I don't really understand why everyone is telling me to remove that battery. Yes , it can break the board , but it seems that everyone here is having problem a few months after removing the battery ...
Coincidence perhaps?

Nothing to stop you replacing it though. :)
Anyone here have a working Ketsui or DOJ board after removing this battery for a long time ? Is there somewhere on the internet where i could buy a new one ?
Should be easy to find, what is marked on the battery in terms of voltage, mAh, etc?
Arcade game board repairer
User avatar
Catzoo
Please Continue...
Posts: 59
Joined: July 6th, 2009, 4:36 pm
Location:

Re: I don't f*cking believe this, my DOJ is dead.

Post by Catzoo »

Thanks :) But i was wondering if anyone here already tried to replace this battery ? :)
User avatar
Xenepp

Re: I don't f*cking believe this, my DOJ is dead.

Post by Xenepp »

The shelf life on these things is generally only about 5 years so I'd say a high percentage of these boards has had the battery replaced.

If the battery has leaked I'd suggest swapping it out asap. You'll definitely want to clean up the leaked acid too. If you are unsure about doing it yourself I'm sure someone around here wouldn't mind doing it for you, or I can if you want to pay for the new battery.

-Joel
User avatar
yosai
Windy City
Posts: 4087
Joined: August 17th, 2008, 5:00 pm
Location: London
eBay: yosai

Re: I don't f*cking believe this, my DOJ is dead.

Post by yosai »

Here's part of the battery datasheet.

Image

As all of these boards were made in 2002 you really should be replacing the battery if it's the original.
User avatar
hakoniwa
Please Continue...
Posts: 98
Joined: September 4th, 2008, 2:33 pm
Location: Furansu

Re: I don't f*cking believe this, my DOJ is dead.

Post by hakoniwa »

Many thread pop up on neo arcadia & arcade system as well.

I was wondering "how are mines?" and checked my Ketsui, Esp garuda & DDPDOJ. Results: 1 really melt, the second one just melt and the third one didn't.

I already took off two of them but I will replace all of them. I'm sure board with problems are the melty/exploded ones.

Thank you for your thread mate :D
User avatar
Xenepp

Re: I don't f*cking believe this, my DOJ is dead.

Post by Xenepp »

Yeah I'm willing to bet those with now faulty boards didn't clean the corrosion after removing their battery.

-Joel
User avatar
Xenepp

Re: I don't f*cking believe this, my DOJ is dead.

Post by Xenepp »

I guess in your case the damage was done since that resistor array was already dead, it could have lead to further problems over time.

Do you have current pics of the board?
User avatar
Xenepp

Re: I don't f*cking believe this, my DOJ is dead.

Post by Xenepp »

Yeah that corrosion will eat through thin tracks (and big ones) quite easily. Good news is it shouldn't be too hard to repair if that's all it is.

-Joel
User avatar
geotrig
Potato!
Posts: 7800
Joined: December 5th, 2008, 1:14 pm
Location: ._.
eBay: ._.

Re: I don't f*cking believe this, my DOJ is dead.

Post by geotrig »

it's not to bad if done right by someone really...can look bad when done badly though.trace it along the track and glue it to the board...and nice green wire to blend in ...anyway it will be in a case no!
Image

<trk>:I remember catching a big fat one and my friend said "throw it back in, that one already tastes like wood"
User avatar
Devil Soundwave
Doesn't go to eleven
Posts: 4713
Joined: January 7th, 2009, 11:56 pm
Location: Wetherby, Yorkshire
eBay: DevilSoundwave

Re: I don't f*cking believe this, my DOJ is dead.

Post by Devil Soundwave »

kernow wrote:Would it just be by bridging them with a thin wire? bit of an ugly repair but I guess you can't rebuild the track any way, sadly. :?
You can repair the track with a conductive silver track pen, yo.

http://www.maplin.co.uk/Module.aspx?ModuleNo=33837
User avatar
markedkiller78
Pony fucker
Posts: 7620
Joined: August 17th, 2008, 6:53 pm
Location: Glasgow
eBay: markedkiller78
Initials: MAL

Re: I don't f*cking believe this, my DOJ is dead.

Post by markedkiller78 »

Image
User avatar
markedkiller78
Pony fucker
Posts: 7620
Joined: August 17th, 2008, 6:53 pm
Location: Glasgow
eBay: markedkiller78
Initials: MAL

Re: I don't f*cking believe this, my DOJ is dead.

Post by markedkiller78 »

I've got a bad / broken trace on a TMNT board that I'm going to bring. If I flex the board in one spot it works perfectly.

Who is saving your DOJ Kern? I would love to see how you fix these things for future reference
Image
VectorGlow
Posts: 502
Joined: November 8th, 2008, 11:40 pm
Location: Wales, UK
eBay: realflight

Re: I don't f*cking believe this, my DOJ is dead.

Post by VectorGlow »

markedkiller78 wrote:I've got a bad / broken trace on a TMNT board that I'm going to bring. If I flex the board in one spot it works perfectly.
Do you know which track it is? I've had boards with broken tracks that when flexed in one area cause the problem to show up, when in fact the break was elsewhere on the board - ie a very, very TINY amount of flex is sometimes enough.
Who is saving your DOJ Kern? I would love to see how you fix these things for future reference
If he can't get it sorted at the meet he's sending it to me. I think. No obligation though. :)
Arcade game board repairer
User avatar
markedkiller78
Pony fucker
Posts: 7620
Joined: August 17th, 2008, 6:53 pm
Location: Glasgow
eBay: markedkiller78
Initials: MAL

Re: I don't f*cking believe this, my DOJ is dead.

Post by markedkiller78 »

I've no clue what track :oops:

I reseated the roms & one pin is totally bent as I though that it was the culprit (when I pushed on it, the board flexed) I'm sure it's something simple tbh, but simple & solder have me stumped
Image
VectorGlow
Posts: 502
Joined: November 8th, 2008, 11:40 pm
Location: Wales, UK
eBay: realflight

Re: I don't f*cking believe this, my DOJ is dead.

Post by VectorGlow »

As you have a TMNT board it's worth noting that problems can also occur with the legs on the various surface mounted CPUs, ie they may not be soldered on properly, the chip may have been knocked, flexed badly, etc. This of course applies to all boards with SMT chips, especially the larger ones with very small finely spaced legs (such as Numan Athletics and others of the later era).
Arcade game board repairer