Alright...I didn't take any progress photos of this project because (I could come up with a whole slew of BS, but instead I will be honest)...well... I just didn't. I did a little here and there until it was finished (well, almost finished, I still have a little to do).
I purchased this DK Jr for $300 off craigslist...

It worked, but the monitor had some major collapse on the left side, the colors sucked pretty bad, the sound hummed, and it was dirty as all hell!

The cabinet itself was in OK condition... the T-Molding was a disaster... the side art was un-salvageable...but the CP was in decent enough condition (except for the jump button which was only semi-responsive)...the bezel was in good condition, and the marquee was in decent condition.


The first thing I did was order a cap kit for the Sanyo 20EZ monitor & sound board the cabinet contained from Bob Roberts. For this monitor a standard cap kit does NOT include 9 caps that historically haven't gone bad too often. The deluxe kit can be had for $2.00 more but I was unaware of this option at the time. Anyway, after re-capping the monitor it came up beautifully (here is where I don't have any photos) aside from one issue...there was a wave to the image. It was a very small wave, but a fast one...it would go away then come back...sometimes worse than others and no amount of adjusting seemed to fix it... After consulting with such minds as Ken Layton, Bob Roberts, and a couple more it was determined the issue was one of 2 things...the DK power supply (more likely), or the B+ Filter Cap (less likely). It was about this time that I started poking around pricing a Double Donkey Kong upgrade. I then looked at the possibilities of making this cabinet a Multi-Kong (which includes DK3 as well). The options were expensive to say the least. It was about this time that I started investigating the infamous classic 48-in-1 JAMMA board. I could spend, literally $350+ for a Double Donkey Kong, a DK3, and the interface to hook them all up in this one cabinet, or for $200 or so I could pick up a 48-in-1 JAMMA board that had all 3 + 45 other games....the choice seemed obvious. I opted to get the 48-in-1. While I ordered the board, I decided to order the 9 additional caps for the Sanyo 20EZ as well as the B+ Filter Cap from Bob Roberts. I also picked up a JAMMA harness at the same time. I negotiated with the distributor of the 48-in-1 who wanted $250 for the board (but he is located here in the states as opposed to Hong Kong) to throw in the Double Donkey Kong marquee for the $250 price. I also needed to pick up an inverter board for the Sanyo 20EZ monitor as it was wired for a Nintendo boardset which uses inverted color video. One of the users here, FLASHDOG, was kind enough to mail me an inverter board AT NO COST...he even refused my offer to cover shipping costs (THANKS BRO!).
While waiting for things to arrive I cleaned up the cabinet by removing the side art (what a pain in the ass), waxing the sides, painting the black portions, installing new white T-Molding, fixing the base of the cabinet where the wood was breaking off the front. I put a new jump button in (though I still need to order and install a new 2nd button (and at the same time I will install a different color button than the black one I used...it was all I had). I also replaced the florescent light in the marquee. It's expensive to replace the original bulb and starter, not to mention it puts out a pretty crappy amount of light, and it's hard to find the parts. A trip to Home Depot for an 18" under the counter florescent light fixed that problem. It plugs right in to the 100v outlet the Nintendo cabinets have in them and doesn't seem to mind running off 100v.
I then went through hours of hell to try to determine where to come up with 16VDC which the inverter board needed to run non-Nintendo games...I finally managed to locate where I needed to solder a lead to the main PCB, added the 9 new caps & B+ filter cap, hacked a couple of cables I had to use with the inverter board, and re-installed the monitor in the cab. I installed the 48-in-1 board (which is about 1/8 the size of just one of the original DK Jr boards!), wired up the JAMMA harness to everything except for a switcher power supply as I didn't have one handy...off to craigslist where I obtained an AT-style PC power supply for $3.50. I plugged it in using a molex connector and fired it up!
It worked! After determining that I needed to jump the V-Center pins for the vertical positioning pot to work I adjusted and am pretty damn happy with the result. The monitor looks fantastic. No more wave...colors are vibrant...and the 48-in-1 works nicely. There ARE some caveats to using a board like this. (a) Only the TOP high score is saved, and in a bonehead move, the initials AREN'T saved! (b) Some sounds are a bit different. I noticed that the DK and DK Jr walking/climbing sound uses a single sound instead of the 2 or 3 that the original uses...The DK Jr "ARGH ARGH" the DK makes when you set him free is missing...some sounds are a little higher pitch, but it's not bad... etc. Because I am using the board with my DK 4-way control panel, 11 of the games which are 8-way are just about useless...so I have removed them from the list. Of the remaining, there are 6 that use 2 buttons...which will be OK once I drill another hole and add a 2nd button (which the DK Jr CP harness already had WIRED but just sitting under the CP! (there is even a hole in the middle of the CP (not where I want it) for another button under the stock CPO!). There are 2 games that suppose to use a spinner/dial (Super Breakout and Arkanoid) which I will use the joysitck and 2 that is supposed to use a trackball (Centipede and Millipede) which are just about useless with a 4-way stick so they too are removed from my list of available games. All games on the board use MONO sound aside from Gyruss which uses Stereo, but no worries as it is an 8-way game that is removed.
Here is what the cabinet looks like now:


TO DO LIST: 1 Donkey Kong side art, 1 Donkey Kong Jr Side Art, new custom CPO which I have already designed but need printed. Shardian attempted to print it for me but his printer wasn't calibrated correctly and the blue is just too off from the color of the bezel to be used (THANKS FOR TRYING THOUGH!).
Here is my custom CPO...if you have a Double DK with a DK Jr bezel (or not) and would like the full size file to use this CPO, PM me...

All in all this is the most expensive arcade project I have put together...that said, about 2/3 of the project was paid for with Birthday money and the Nintendo cabinet is one of my favorite! I am very happy with the result thus far!