Troubleshooting
101
Introduction Playing Sounds Editing Sounds
Other Convenient  
Functions
Connecting Other 
Equipment
Appendix
Quick Guide
Problem Items to check Action Page
Problems with the Synthesizer eects
Eect not applied
Could the eect switch be o? Check the on/o setting of each eect. p. 58
Is each layer’s Output Assign set to “MFX”?
With the factory settings, the Output Assign of some are not set to 
“MFX.” Set the Output Assign to “MFX.”
p. 75
Check the send level to each eect.
The eect won’t be obtained if the send level to that eect is set 
at 0. Even if the send levels to the eect is set above 0, the eect 
won’t be applied if the multi-eect output level, or reverb level are 
set to 0. Check each of these settings.
p. 59
You specied a delay time 
value (for example for multi 
eect 43: DELAY) as a note 
value, but there’s a limit 
beyond which the delay 
time will not change
Check the delay time setting.
Increase the tempo.
Since the delay time has an upper limit, specifying the delay time 
as a note value and then slowing down the tempo may reach this 
upper limit. The maximum delay time is the highest value that can 
be specied numerically (i.e., other than in terms of a note value).
p. 47
Problems with the USB Memory Song Player/Recorder
USB ash drive is not 
detected / Song les are 
not displayed
Check the format of your USB ash drive.
Format the USB ash drive on the JUPITER-50.
The JUPITER-50 can use USB ash drive that is formatted as FAT. 
(Normally, when you purchase USB ash drive, it will be formatted 
as FAT, so you can start using it immediately.) However, the 
JUPITER-50 cannot recognize a USB ash drive that is formatted in 
a format other than FAT (e.g., NTFS).
p. 70
Audio les on USB ash 
drive won’t play
The audio le’s le type might not be a le type that can be 
played on the JUPITER-50.
Use an audio le of the types listed in “Song les that can be 
played”.
p. 65
The audio le may be damaged. Check the audio le. —
Could the level be turned down?
Check the [VOLUME] knob setting, the Song Level setting and the 
SONG EQ’s Level setting.
p. 26, p. 64,  
p. 75
Noise and distortion is 
heard in the recorded 
sound
Was the input sensitivity appropriate?
If the input sensitivity is too high, the recorded sound will be 
distorted; if the input sensitivity is too low, the recorded sound 
will be buried in noise.
Raise the Recording Level knob as high as possible without 
causing the level meter’s CLIP indicator to light in red.
p. 68
Problems with external MIDI devices
No sound from an external 
MIDI device
Does the JUPITER-50’s MIDI transmit channel match the 
connected device’s MIDI receive channel?
Match the JUPITER-50’s transmit channel and your connected 
device’s receive channel.
p. 77
Exclusive messages are not 
received
Does the transmitting unit’s Device ID number match the 
JUPITER-50’s Device ID number?
Set the Device ID numbers. p. 77
When using sequencer 
software, operating knobs 
or other controls does not 
aect the sound
Some sequencer software does not “soft thru” system exclusive 
messages.
If you want to record system exclusive messages, turn on the Local 
Switch parameter.
p. 75, p. 86
Problems with an external device you’re recording
The volume level of the 
instrument connected to 
AUDIO IN (STEREO) is too 
low.
Could you be using a connection cable that contains a resistor? Use a connection cable that does not contain a resistor. —
Is the volume of the external device adjusted correctly? Adjust the volume of your external device to an appropriate level. —
Is the [LEVEL] knob adjusted correctly? Adjust the [LEVEL] knob. p. 28
Problems with the USB ash drive
Data on the USB ash drive 
was damaged
Could you have turned o the power while the USB song 
player/recorder was operating?
Format the USB ash drive on the JUPITER-50. p. 70
Could a strong physical shock have been applied to the USB 
ash drive?
Could the power have been turned o while accessing the USB 
ash drive?
Can’t back up to USB ash 
drive
Is there sucient free space on the USB ash drive? Use an SD card that has sucient free space. p. 78
Check the format of the USB ash drive. The JUPITER-50 can use 
USB ash drive that are formatted in FAT format.
Format the USB ash drive on the JUPITER-50. p. 70