Your SY99 comes with a front panel. Select "Switch Lock" to disable your front panel: [Utility], "F1: Sys", "Switch Lock".

The SY99 has some tricky keystrokes to enter special features:

	ROM version information display (Q2201)
	SY99 Test mode (Q2911)
	SY99 Debug mode (Q2912)
	Changing main volume bahviour (Q2913)

The SY99 Test Mode was designed to test the SY99 hardware components.

Aside the normal SY99 Test Mode, there is an even more hidden “Advanced SY99 Test Mode”, which can be accessed by pressing [1] or [2] from the SY99 Test Mode main screen (see below).

CAUTION: Do NOT use the SY99 Test Mode if your synthesizer is working properly.

When entering SY99 Test Mode, you will loose all non-saved edit information stored

in volatile memory (e.g. the complete sequencer memory contents), since SY99 Test Mode

can only be exited by rebooting the SY99 (by turning off and turning it on again).

Therefore, it is highly recommended that you make a complete backup of your SY99 memory before entering SY99 test mode.

Diskette test routines may overwrite / format / erase disk contents. Insert a special test diskette with non-sensitive data before testing the disk drive.

Also dettach other synthesizers and amplifiers, because some low level test routines may send a maximum velocity sine tone to the output groups. These test routines can destroy your monitor equipment.

Enter the SY99 Test Mode by pressing (and holding down) [Voice]-[Bank D/EL4]-[8/OP 8]

<TT>*** SY99 TEST Ver 1.10 *** Please select</TT> 

<TT> Main ROM : Version 1.57 1992-05-12

 SEQ. ROM : Version 1.20 1991-06-22</TT> 

<TT>   [-1] : Auto        [+1] : MANUAL

 [COPY] : Fact.Set  [EXIT] : Exit</TT> 

Now press one of the following front panel switches:

 Your SY99 MIDI Manual shows a way to enable this test mode by sending the System Exclusive Message F0 43 1n 18 5A 00 F7 to your synthesizer (where n is probably the device number).

The SY99 has 11 different debug modes. You can access each debug mode by pressing (and holding down) the 'debug mode switch sequence' ( [Cursor Left]-[Cursor Right]-[Cursor Down]) in combination with one of the following keys:

<TT>[ENTER]</TT> 

Pressing [Left]-[Right]-[Down]-[Enter] will show a short information display about all available 'undocumented' keystrokes:

[0] task LED

[1] kill cntrl

[2] init ram$

[3] xmit kas out

[4] ch LED

[5] kill ad_scan

[6] xmit seq prm

[7] designers

[8] show title

[9] bye bye

[-] xmit screen

This operation is being investigated. If you have any further knowledge about this feature, please mail to sy99@relish.ch

According to the task (?) management, the 8 LEDs (4 Memory and 4 Bank) on the upper right corner will lighten up.

This operation is being investigated. If you have any further knowledge about this feature, please mail to sy99@relish.ch

This might be some kind of MIDI 'panic' button, e.g. when a MIDI controller 'hangs'.

CAREFUL:

This keystroke sequence will ERASE ALL MEMORY CONTENTS and

load FACTORY PRESETS. Your SY99 will then be rebooted.

This operation is being investigated. If you have any further knowledge about this feature, please mail to sy99@relish.ch

This key command sequence will enable the 'channel mode'

[EF BYPASS]-LED becomes a MIDI OUT status LED. Each time a note is played or released, the LED status will be set to on.The 16 Operator LEDs will show the internal voice organisation.

Pressing the whole sequence again will turn this option off.

This operation is being investigated. If you have any further knowledge about this feature, please mail to sy99@relish.ch

This operation is being investigated. If you have any further knowledge about this feature, please mail to sy99@relish.ch

The designers screen will show you the names of the SY99 designers: 

<TT>| SY99 Designers                        |

|                                       |

| TAMORI MITSUOKA TAKEYAMA FUJITANI     |

| WATARI MIYANO SHIBUTANI HASEBE KOIKE  |

| IWEBACHI KAKIZAKI FUNADA OJIMA SUZUKI |

| SAWADA YANO MATSUMOTO ASAKURO KANEKO  |

|                                       |

| Thanks for all designers of SY77      |</TT> 

The designers screen will disappear automatically after five seconds.

This will restart your SY99. It has the same function as if turning the SY99 off and on again.

You will loose all data stored in volatile memory (e.g. sequencer contents and non-saved

edit changes) when executing this command.

CAUTION:

This operation will erase data stored in volatile memory and lock your synthesizer.

<TT>| Sorry!                          |

| Error occured. (*****)          |</TT>

<TT>| Please turn the power off once. |</TT> 

The (*****) usually referrs to as the error number. To exit this display, turn power off and on again.

The xmit screen function is likely the same feature found in the Motif ES debug, transmit a LCD screenshot to a computer.

When pressing [SHIFT]-[EF BYPASS], the Main Volume Fader will change its behaviour and directly affect the Wet/Dry of the Effect Processors instead of controlling the Main Volume.

When entering this 'direct effect control' mode, the [EF BYPASS]-LED will start to blink.

By pressing [EF BYPASS] the original behaviour of the Main Volume Faders is restored.