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Place the DX7mega128 board gently on the DX7 main board so that the 28 pins that form a DIP
package align with the vacated IC14 spot. The 8 pins along the edge should align with IC20. Do
not press the board in place yet. You can use a small mirror to check the pin alignment.
Once you are happy that all the pins are aligning with the desired locations, firmly and evenly
press the DX7mega128 board in place. Make a visual check to see that the board is flush with the
sockets.
Using a screwdriver, carefully tighten the original main board screw through the DX7mega128
board into the nylon standoff. Again do not force it or over tighten as this can not only strip
the standoff, but it can cause the DX7mega128 board to change position. It should be tight
enough so that it cannot work lose. Double check the pins.
Reassembly
Remove all tools from the DX7. Carefully reassemble the DX7 in the reverse order, taking care to
replace the correct screws in the various locations. If you disconnected the green keybed ground
strap wire don't forget to screw it back in.
Test
Plug the AC cable in and turn it on. After a few moments, you should get a greeting message like:
DX7mega128
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Welcome to
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DX7mega128
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Install v1.20
Preliminary
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