Re-posted.
Here's how to convert a "flash rom" DBV-200
to an "EPROM" DBV-200, in pictorial format. I can't
flash DBV-200 heads (i don't have the software or
the serial cable), so having an EPROM is far easier
for me. Below are pictures of an IGT DBV-200 SS head.
But this works for Williams model 40x DBV-200 SG heads too.
The holes for the EPROM socket on the DBV head board are
already there. I tried both low-profile green and regular
black strip sockets. Both worked well. The new socket for the
EPROM can't stick up further than the metal housing
(otherwise the DBV-200 won't mount correctly). The green
low-profile strip socket worked best, and standard black
strip SIP sockets also worked (but there's no room for
anything taller). Before soldering the SIP socket strips in
place, i gently sanded (400 grit) the solder holes on the board
so the solder sticks nicely.
Also it is careful work removing the original Flash ROM.
I used a razor blade and cut all the pins on one side
of the chip. (Be careful not to cut the board or the board's traces.
Cut perpendicular to the board, towards the chip. This avoids
cutting the board traces.) Then bend the chip up and back/forth
a couple times, and the chip breaks off. Lastly clean-up the
board with a fine soldering iron where the chip was cut with a razor
blade. This ensures none of the (very small) pins that were cut
and left behind on the board are not shorting to each other.
This same procedure can be applied to Wms DBV-200 SH/SG
bill validator heads too. I tested this and it works well for
the Williams/Bally heads.
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