First, download the schematics from Sander Meyers' site.
Second, the backup battery is not involved in the actual operation of thesynth --
all it does is provide voltage to the RAM chips while the synth is turnedoff.
There are MANY possible causes for the problems you describe; Iwould start with the interboard connectors, which are the cause of manyof the problems encountered in the DK600.
When in doubt, refer to the schematic.
And incidentally, the chips inside this synth are worth WAY more thanwhat you paid; even if you can't get it working, you didok.
~G
At 08:28 AM 10/30/2006, you wrote:
I was excited to find one in asmall shop for $50, thinking the
"obscure fuse" was the main reason behind the low price (andthe fact
that the shop owner was focused on guitar repair). The only thingthe
shop owner knew about the DK-600 is that the battery often leaks and
destroys all
the internal goodness. He said it hadn't leaked, but I knew that I
should replace it soon anyway. I didn't expect it to be perfect whenI
put in a fuse, but at least it turned on. There was no sound output,
but when looking for the battery, I saw the ribbon cable connecting
the keyboard PCB to the display PCB was unplugged. That solved the
problem.....for about a day or two.
Now, I am unable to use the keypad at all to select differentpatches.
The display still lights up, but when I try to edit the first patch
that loads on startup, only the pots will work, NO PUSH BUTTONS
anywhere on the entire panel. This
change didn't happen all at once; it went from being able to use
everything, to only being able to press certain number keys to get
certain patches, to only editing the first patch, to editing the
first patch until it "stopped letting me" make any morechanges, to
where I am now.
What exactly am I dealing with? I have soldering experience and a
multimeter, but I'm trying to figure out how severe this could be.The
first thing I am planning on doing is replacing the backup battery,
even though I am sure it is more of a power or chip issue. Anyideas?