Arcade Collecting > Restorations & repair
Mario Bros in Red !
arcadefever:
:applaud: very nice !!! happy to see the PCB working after many years of storage ;)
Level42:
--- Quote from: arcadefever on June 22, 2008, 01:21:13 am --- :applaud: very nice !!! happy to see the PCB working after many years of storage ;)
--- End quote ---
Thanks fever... :) Yeah I really expected the board-set to have at least some problems but it's still running 100% :)
Now I gotta make up my mind on how to restore the sides and kickpanel......should I paint it completely or just "touch-up" the bad parts..... I fear of loosing the "original" look of the laminate when I paint it....
Level42:
If anyone ever needs the exact replacement for the Nintendo coin mechs:
http://www.asahiseikousa.com/html/roll_downkwm740.html
Amazingly, they are still in production and look exactly like they did 27 years ago :)
They are a bit costly, $38,- from what I've read elsewhere...but they're all aluminium so NO rust :)
Does anybody know a dealer ?
I found a dealer in Indonesia that has all the spare parts for this mech listed but I don't feel really comfy about ordering there.
Level42:
Some updates:
I loosened the sound/control board to see what cap values I needed to re-cap it. Well it was a nightmare to get it loose because of the (much too) long bolts that I needed the nuts to un-screw off. This plus the fact that Nintendo obviously was scared this PCB could come loose in transport and they put some really sticky stuff on it to hold the nuts.
Got all three loose eventually and wrote down the values. Then I put it back in place and fired up the machine again.......no picture. Stupid me ! I had removed the neck-board from the CRT to be able to reach the control/sound board better and forgot to put it back :banghead:
Powered down, re-installed the neck-board and powered up again. No vertical deflection anymore, no sound anymore :banghead: :banghead:
After some searching I found out that a soldering had come loose. Resoldered it and had perfect picture again. Sure was glad it was just that !
However, the sound now sounded like it was constantly "tripping". Only some peaks seemed to "get through".
I checked out my local electronics parts dealers' catalogue and decided instead of trying to revive the old sound board, I would replace it with a much more modern solution:
http://www.vellemanusa.com/us/enu/product/view/?id=350529
A small and cheap kit, a simple one IC amp. (For just €9.95 I couldn't justify trying to get the old-amp working again (and maybe fail).
I connected the 7P-Sound connector (+12V and GND, thanks Ken) as supply for the amp, since that connector is only used for the old-style DK boards. I removed the volume pot from the control board and set it up in the ingoing line. It worked great, but it was very loud :) I'll need a logarithmic pot I guess or a different value...
Turned it down, and now it sounds fine. Although there is still some small hum. I guess this must be picked up in the board-set someway. However it is much,much less than it was.
I'll put up some pics when I finished it installing neatly.
WunderCade:
Is the monitor a SanyoEZ that came in the cab with that wood case or is it something else? Is MB video inverted like DK?
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