DJX PSS-D1 finally got round to it!

[SineHacker]

Hi all, I haven't posted in a while and I haven't been doing much bending because of work and MA ties, but as I mentioned sometime in 2009, I've had one of these waiting under the table, the original Yamaha DJX PSS-D1

I bent a DJX-2B previously which was the hardest machine to work with I've encountered so far (see the thread here if you're interested) but the PSS-D1 was much more forgiving and easy to bend, despite having an almost identical circuit board layout to the groovebox. If you have one bend it, it's easy and fun!

there is almost definitely much more stuff in there that I didn't find but I was quite satisfied with the 30 patch points that I choose to include. This probably one of the last keyboards that yamaha made using AMW before AMW2 became the standard in their 90's products. (AMW2 is in the groovebox and as mentioned is significantly more difficult to work with)

nuff sed, here's some mug shots:







I was able to keep the internal speaker in below the patch bay, nice! it took me nearly a week to shape that off cut of plastic i used for the panel, it did have a mirrored backing which didn't peel off but scratched easily, I used it on a VSS200 which was one of my first bends and it looked a bit like a disco, so this time I used some steel wool to remove the mirror backing and give a really light frosting effect:



I used a miller to position and drill the 4mm patch sockets with a precision to 1/5mm. this worked fine, but then i also drilled 3mm holes to allow for the speaker sound, and I didn't lock down the plate properly which caused the drill bit to chew up and split the panel as it exited - after shaping the panel for a week I couldn't bring myself to restart the job so i used it anyway:



the miller is a great tool, this one belongs to the uni:



oh oh, did anyone come across these before, stackable test/patch cables? there are two cables stacked in the pic. from rapid, nice!:



and some internal pics, if you are thinking about bending one, don't go by the markings that you can see in these pictures because some of them are marking up nasty crash points! I would encourage you to explore the machine for yourself to see if you can find any cool stuff I didn't!:














if anyone has any questions feel free to ask away


I promise a video soon 

[SineHacker]

here's my music video 

DJX PSS-D1 circuit shagged my music video!!

[Gordonjcp]

Those two 28-pin chips below the chip with your bend leads coming off look like memory chips.  Can you read the numbers on them?

[SineHacker]

Hey Gord, hope all is well! I don't think they are memory chips - although the DJX has a sampler, the DJX2B has pretty much exactly the same board layout, and no sampler. I was hoping for similar bends to the DJX2B, where all the interesting spots are on the fat rectangular chip to the left of the pair - and you can see clearly on the DJX2B that all the pins on that chip connect to the two. Everything I tied, and I did have a good try believe me, either did nothing or caused a dead crash.

I did get excited about them possibly being memory when I opened it up but couldn't get anything from them, from what I have discovered so far, the DJX bends more like the older PSS keyboards that use AMW, like the PSS-790 or the PSS-500/600.

however I will get those numbers for you in case you can pick up on anything! I've always had trouble finding any information like datasheets on more recent Yamaha technology i.e post 90's