Checking Battery Status: 1) Press the brown [FUNCTION] 'SPACE' button. 2) Press the [14] 'BATTERY CHECK' button. The current voltage will be displayed on the screen.
How do I reset my Yamaha dx7s?
DX7 - Factory Reset
- Insert ROM 3 cartridge (ROM#1 outside the USA) into the cartridge slot. ...
- Press the [MEMORY PROTECT INTERNAL] button. ...
- Press the [-1/NO] button to toggle the Memory Protect to OFF.
- Press the [FUNCTION] button.
- Press the #[16] button for LOAD. ...
- Press the [+1/YES] button. ...
- Press the [+1/YES] button.