TNR Power On Buttons
This page describes the behaviour of the TNR when certain buttons are held down on power up/boot. Most of these require a degree of finger flexibility (or a friend) since they aren’t easy to actually do.
Safe to execute
| Combination | Name | Description |
|---|---|---|
| [OK] & [CANCEL] | “ROM Update” | Allows new “Main”/TLCS firmware to be loaded. This is how Yamaha update the firmware (e.g. to v210) and can be rolled back if required. |
| [L1] & [L5] | “Advanced Mode” | Enters advanced mode, allowing the layer types (Score/Random etc.) to be changed |
| [L1] & [CLEAR] | “Test Mode” | This is described in the service manual. This provides a menu to a series of inbuilt tests that a service engineer can use to diagnose an issue. |
| [L2] & [CLEAR] | “Auto test mode” | Runs through all the tests one by one |
| [L3] & [CLEAR] | “DAC test” | Runs a DAC test (produces a continuous loud tone until you turn it off) |
| [R5] & [CANCEL] | Boot test output | Outputs the results of the boot ROM test |
| [R5] & [CLEAR] | “Normal mode” | Cancels the advanced mode setting, back to normal mode |
Not Safe to execute
The following ones provide ways of updating other sections of the ROM. I have an image of the boot code, and of the Tone generator code (and default sounds). The TG program and TG sounds are probably safe to load, but I haven’t tried it yet, hence the caution. Updating the “Main Prog” is extremely dangerous, since the “Main Prog” is in fact responsible for providing its own update - i.e. if you corrupt the Main Prog, there is no way of recovering your TNR. Updating this will brick your TNR.
| Combination | Name | Description |
|---|---|---|
| [R1] & [CANCEL] | “Main Prog Update” | This updates the boot code of the TNR. |
| [R2] & [CANCEL] | “TG Prog Update” | This updates the code running on the SWL01 (the Tone Generator). |
| [R3] & [CANCEL] | “TG Wave Update” | This updates the instrument definitions running on the SWL01, as well as (via a separate file) the names of the instruments. |
