| Menu Text | Function | |
| 01 | ROM Check | Test of ROM-ICs (IC123-126) |
| 02 | RAM Read/Write | Test of RAM-ICs (IC127-130) |
| 03 | Sequencer ROM | Test of Sequencer-ROM (IC151) |
| 04 | Sequencer RAM | Test of Sequencer-RAM (IC153, 158-159) |
| 05 | RAM Battery | Show Battery Voltage |
| 06 | LCD All On | switch Display black |
| 07 | LCD All Off | blank Display |
| 08 | LED Check | process LED sequence |
| 09 | Panel Switch | (interactive) Control Panel test |
| 10 | Pitch Bend | (interactive) Pitch Bend Wheel test |
| 11 | Modulation WH1 | same as above, but Modulation Wheel 1 |
| 12 | Modulation WH2 | ...and 2 |
| 13 | Data Entry | (interactive) Data Entry Slider test |
| 14 | R-Encorder or R-Encorder
(depends on OS version) |
(interactive) Data Entry Wheel test |
| 15 | Keyboard Check | (interactive) Keyboard test |
| 16 | After Touch | (interactive) Aftertouch test |
| 17 | MIDI (I/O/T) | test of MIDI in/out
(connect MIDI in and MIDI out for this test) |
| 18 | D-Card Insert | (interactive) Data (RAM-) Card insertion test |
| 19 | D-Card R/Write | Data (RAM-) Card read/write test |
| 20 | D-Card Protect | Data (RAM-) Card write-protection test |
| 21 | D-Card Battery | show Battery Voltage of Data (RAM-) Card |
| 22 | W-Card Insert | same as 18, but Waveform Card |
| 23 | W-Card Read | same as 19, but Waveform Card (read only) |
| 24 | Disk Read/Write | Floppy and Floppy Controller test
Warning: Data on disk will be destroyed. Use empty disks only! |
| 25 | Disk Eject | (interactive) Disk Eject Sensor test |
| 26 | Breath Control | (interactive) Breath Controller test |
| 27 | Foot Volume | same as 26, but Foot Volume Pedal |
| 28 | Foot Controller | same as 26, but Foot Controller Pedal |
| 29 | Sustain Switch | (interactive) Sustain Switch test |
| 30 | Foot Switch | same as 29, but Foot Switch |
| 31 | 1KHz to L1->L1 | 1kHz FM Sound to Output L1 |
| 32 | 1KHz to R1->R1 | same as 31, but Output R1 |
| 33 | 1KHz to L2->L2 | same as 31, but Output L2 |
| 34 | 1KHz to R2->R2 | same as 31, but Output R2 |
| 35 | 1KHz to L2->L1 | same as 32
If L2 isn't connected, sound must appear on L1. (Output 1+2 Test) |
| 36 | 1KHz to R2->R1 | same as 35, but R-Outputs |
| 37 | 1KHz to R1->L1 | same as 35, but Output R1
If R1 isn't connected, sound must appear on L1. (Mono Output Test) |
| 38 | Effect_0 to L1 | 1kHz FM Sound Output (Effect 0 -> L1)
Signal routed to 4 Channels with fallback on sum- or mono outputs |
| 39 | Effect_1 to L1 | same as 39, but using FX path 1 (PAN/LEF Test) |
| 40 | Effect_2 to L1 | same as 39, but using FX path 2 (PAN/LEF Test) |
| 41 | PCM Check | PCM playback test |
| 42 | FM Thru M3(PCM) | AWM test |
| 43 | FM Thru M3(FM) | Digital Filter test |
| 44 | Feedback FM->M3 | FM Feedback test |
| 45 | Click High | test of High Click (Metronome) |
| 46 | Click Low | test of Low Click (Metronome) |
| 47 | Jacks All Off | check Switch Detection
(plug in both switches and press them, then pull them off the jacks while still being pressed) |
| 48 | Factory Set | Reset SY77 to Factory Settings
(deletes all stored data!) |
| 49 | Exit | leave menu & reset SY77 |
| 50 | Jump to CARD | undocumented, possibly jumps into program data
stored on Data Card |