I finally changed the battery in my old DX7 (after 27 years!). An easy job, as the front panel is hinged and swings up to reveal the battery below. The battery has tags through the main circuit board, so to replace it in the same way would mean removing this board from the case. The method I used was to gently prise the old battery off its tags, then solder a battery holder into the tags.
Just for fun I checked the old battery voltage and it was 0.2v (a far cry from 3.0v). The amazing thing is that the DX7 memories were still working perfectly! The original Sanyo battery showed no signs of leaking, and the only hint of trouble was the battery voltage (on the DX7) was reading 4.5v.
After I reassembled the keyboard I reloaded my favourite sound bank from the computer, and it is up and running again. The only thing to need resetting was the Function data.
Just for fun I checked the old battery voltage and it was 0.2v (a far cry from 3.0v). The amazing thing is that the DX7 memories were still working perfectly! The original Sanyo battery showed no signs of leaking, and the only hint of trouble was the battery voltage (on the DX7) was reading 4.5v.
After I reassembled the keyboard I reloaded my favourite sound bank from the computer, and it is up and running again. The only thing to need resetting was the Function data.
