Yamaha Disklavier MX100A - Checking Software Versions on Non-Controller Models

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7. Checking the Version on Silent Pianos and GranTouch models
Since Silent Pianos and GranTouch models do not have controllers, you need to use the keyboard to engage ver-
sion-check mode. The piano then identifies the sensor and tone-generator versions by playing out notes as
described below. This operation is common for all models that lack controllers.
Enter version-check mode: 2A# + 5C#+7D#+ [POWER]
• Sensor version Number of notes played of ascending C-major scale starting at 4C.
Example: “4C” “6D” indicates Version 2.
• Tone-generator version: Number of notes played of descending C-major scale starting at 88C.
Example: “ 88C” “87B” “85 A” indicates Version 3.