Is it doing this with the GD Rom disconnected also?
You may have blown a buffer. BTW a failed GD Rom drive can fry your DIMM too.
You may have blown a buffer. BTW a failed GD Rom drive can fry your DIMM too.
- Thread starter xanderXone
- Start date
xanderXone
Student
Regarding Error 22, Ken has this to say (from Arcade-Museum):
I would take it as gospel. I get Error 22 on two of my DIMM boards, both boards were in cabs that had +5V voltage over 5.15. After adjusting voltages on all my cabs to slightly over 5V I haven't had any subsequent issues with DIMM boards. Check your voltages and grab another DIMM.
xanderXone
Student
Thank you for the info ∆∆∆∆
I believe that I may have just had the dimm board seated incorrectly causing the error 22. Prior to that all I had been seeing was error 21.
I am going to test it some more tonight and see how it goes.
It looks like I am going to have to get a cap kit and new flyback to fix my monitor issues as well
I believe that I may have just had the dimm board seated incorrectly causing the error 22. Prior to that all I had been seeing was error 21.
I am going to test it some more tonight and see how it goes.
It looks like I am going to have to get a cap kit and new flyback to fix my monitor issues as well
xanderXone
Student
I'm not sure what you are asking, but maybe someone else who knows more will chime in.
To update this thread and bring everyone up to speed: After installing a new cap kit and flyback, and adjusting the voltage on my power supply the arcade is working better than ever!
I'm still getting error 21 on startup, but usually only one or two times before it works. I need to buy/borrow a good multimeter since the cheap harbor freight one I have isn't cutting it.
Next order of business is some repair work to a couple of the edges, and installation of new T-molding, and some fresh paint in a few places to finish up the job!
Thanks again for everyone's help and advice!
Swoop up the cap kit for the Sun PSU while you are at it: https://iankellogg.com/sun-power-supply-cap-kit.html.
Let us know if that resolved intermittent ERROR 21 issues as well.
Yes they will. Don't get your hopes up too high though, replacing the buffer has only fixed one DIMM I tried it on even though it is one of the top three failures on the DIMMS.
What I've read is these buffers will all fail eventually from some guy who has repaired 200+ I don't know how accurate that is.
Can you list or link the 3 common dimm failures?
Brentradio
Champion
So basically what you are saying is the chances of this fix working are pretty dimm...
Any idea why my horizontal hold would be hyper sensitive when connecting my netboot setup up to a CPS2 cab? When I take it off and reconnect the CPS2, it's fine. I've tried several other remote boards for the K7000 that's in it and they all are the same way.
xanderXone
Student
I just finished installing the sun power cap kit, and man was that difficult! I used the same solder sucker that I used on the monitor PCB but it was not working at all. The copper traces are so close together that I had a really difficult time not bridging the connections. Some of the solder pads were even lifting off the board! What a pain!
After powering on the first time though it booted right up with no errors, so that's a relief. I'm just hoping that my soldering job will be good enough to stand the test of time. I guess we'll have to wait and see.
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Cool @xanderXone. Keep us posted on the frequency of the recurrence of ERROR 21. I know @twistedsymphony has cap kit'ed his Sun PSU and he has said he never has issues with the NetDimm that others hate so much. Might be a correlation.
yeah I capped a couple of NAOMI PSUs but those were having trouble holding a stable voltage or couldn't be adjusted into range.
on my cab I run the 3.3V a little hot (adjusted to 3.4V at the NAOMI's power connector). 5V I don't think matters much for the Net DIMM (though mine is adjusted to 5.05V)
making sure your cart connectors are free of damage and clean is important. Also using screws to clamp down the Net DIMM helps too
on my cab I run the 3.3V a little hot (adjusted to 3.4V at the NAOMI's power connector). 5V I don't think matters much for the Net DIMM (though mine is adjusted to 5.05V)
making sure your cart connectors are free of damage and clean is important. Also using screws to clamp down the Net DIMM helps too
xanderXone
Student
Just a quick update: The system is still not running correctly. I am still getting freezing in the loading menu and the occasional error 21. I've been using my harbor freight multimeter still since I can't seem to find anyone that has a better one that I can borrow. The fan on the power supply is really noisy though, so I am going to replace that next and continue to play with the voltages and see if that solves the problem. Does anyone know where I can get a 80mm fan with a 2-pin JST PH connector?
streetfighterken
Grand Master
Any 3-pin fan will work. Just cut the old fan wires and solder +12 and Ground to them. To identify what the wires are on the new fan, touch a 9-volt battery to them and see what works.
xanderXone
Student
Why would I do that when I could just buy the fan with the right connector?
What I needed was a two pin connector, there are a few different styles though so you need to make sure that you are buying the correct one.
It took a little research but I was able to find one on Amazon, and it is now installed. I have tried to cycle the power a few times and I get Error 21 on first startup but then the next power cycle loads the game no problem. I probably need to replace the dimm battery or something I'm sure.
What I needed was a two pin connector, there are a few different styles though so you need to make sure that you are buying the correct one.
It took a little research but I was able to find one on Amazon, and it is now installed. I have tried to cycle the power a few times and I get Error 21 on first startup but then the next power cycle loads the game no problem. I probably need to replace the dimm battery or something I'm sure.
xanderXone
Student
Because then you can use any fan you want? I use Sunon MagLev ones pretty much exclusively for everything. I just get the right size and resolder the old leads. It takes like two minutes.
