4
IMPORTANT NOTES
Power Supply
•  Do not connect this unit to same electrical 
outlet that is being used by an electrical 
appliance that is controlled by an inverter 
or a motor (such as a refrigerator, washing 
machine, microwave oven, or air conditioner). 
Depending on the way in which the electrical 
appliance is used, power supply noise 
may cause this unit to malfunction or may 
produce audible noise. If it is not practical 
to use a separate electrical outlet, connect a 
power supply noise lter between this unit 
and the electrical outlet.
•  The AC adaptor will begin to generate heat 
after long hours of consecutive use. This is 
normal, and is not a cause for concern.
•  To prevent malfunction and equipment 
failure, always make sure to turn o the 
power on all your equipment before you 
make any connections.
•  With the factory settings, the JUPITER-50 will 
automatically be switched o four hours after 
you stop playing or operating the unit. If you 
don’t want the unit to turn o automatically, 
change the “Auto O” setting to “OFF” as 
described on p. 79.
*  The settings you were editing will be lost when the 
unit is turned o. If you want to keep your settings, 
you must save your settings before turning the 
unit o.
Placement
•  Using the unit near power ampliers (or 
other equipment containing large power 
transformers) may induce hum. To alleviate 
the problem, change the orientation of this 
unit; or move it farther away from the source 
of interference.
•  This device may interfere with radio and 
television reception. Do not use this device in 
the vicinity of such receivers.
•  Noise may be produced if wireless 
communications devices, such as cell phones, 
are operated in the vicinity of this unit. 
Such noise could occur when receiving or 
initiating a call, or while conversing. Should 
you experience such problems, you should 
relocate such wireless devices so they are at 
a greater distance from this unit, or switch 
them o.
•  Do not expose the unit to direct sunlight, 
place it near devices that radiate heat, leave 
it inside an enclosed vehicle, or otherwise 
subject it to temperature extremes. Excessive 
heat can deform or discolor the unit.
•  When moved from one location to another 
where the temperature and/or humidity is 
very dierent, water droplets (condensation) 
may form inside the unit. Damage or 
malfunction may result if you attempt to use 
the unit in this condition. Therefore, before 
using the unit, you must allow it to stand for 
several hours, until the condensation has 
completely evaporated.
•  Do not allow objects to remain on top of 
the keyboard. This can be the cause of 
malfunction, such as keys ceasing to produce 
sound.
•  Depending on the material and temperature 
of the surface on which you place the unit, its 
rubber feet may discolor or mar the surface. 
You can place a piece of felt or cloth 
under the rubber feet to prevent this from 
happening. If you do so, please make 
sure that the unit will not slip or move 
accidentally.
•  Do not put anything that contains water on 
this unit. Also, avoid the use of insecticides, 
perfumes, alcohol, nail polish, spray cans, etc., 
near the unit. Swiftly wipe away any liquid 
that spills on the unit using a dry, soft cloth.
Maintenance
•  For everyday cleaning wipe the unit with a 
soft, dry cloth or one that has been slightly 
dampened with water. To remove stubborn 
dirt, use a cloth impregnated with a mild, 
non-abrasive detergent. Afterwards, be sure 
to wipe the unit thoroughly with a soft, dry 
cloth.
•  Never use benzine, thinners, alcohol or 
solvents of any kind, to avoid the possibility 
of discoloration and/or deformation.
Repairs and Data
•  Please be aware that all data contained in the 
unit’s memory may be lost when the unit is 
sent for repairs. Important data should always 
be backed up USB ash drives, or written 
down on paper (when possible). During 
repairs, due care is taken to avoid the loss of 
data. However, in certain cases (such as when 
circuitry related to memory itself is out of 
order), we regret that it may not be possible 
to restore the data, and Roland assumes no 
liability concerning such loss of data.
Additional Precautions
•  Please be aware that the contents of memory 
can be irretrievably lost as a result of a 
malfunction, or the improper operation of 
the unit. To protect yourself against the risk 
of loosing important data, we recommend 
that you periodically save a backup copy of 
important data you have stored in the unit’s 
memory on USB ash drives.
•  Unfortunately, it may be impossible to 
restore the contents of data that was stored 
in the unit’s memory or USB ash drives once 
it has been lost. Roland Corporation assumes 
no liability concerning such loss of data.
•  Use a reasonable amount of care when using 
the unit’s buttons, sliders, or other controls; 
and when using its jacks and connectors. 
Rough handling can lead to malfunctions.
•  Never strike or apply strong pressure to the 
display.
•  When disconnecting all cables, grasp the 
connector itself—never pull on the cable. 
This way you will avoid causing shorts, or 
damage to the cable’s internal elements.
•  To avoid disturbing others nearby, try to keep 
the unit’s volume at reasonable levels. You 
may prefer to use headphones, so you do not 
need to be concerned about those around 
you.
•  The sound of keys being struck and vibrations 
produced by playing an instrument can be 
transmitted through a oor or wall to an 
unexpected extent. Please take care not to 
cause annoyance to others nearby.
•  When you need to transport the unit, 
package it in the box (including padding) 
that it came in, if possible. Otherwise, you will 
need to use equivalent packaging materials.
•  Use only the specied expression pedal 
(EV-5; sold separately). By connecting any 
other expression pedals, you risk causing 
malfunction and/or damage to the unit.
•  Some connection cables contain resistors. 
Do not use cables that incorporate resistors 
for connecting to this unit. The use of such 
cables can cause the sound level to be 
extremely low, or impossible to hear. For 
information on cable specications, contact 
the manufacturer of the cable.
•  The usable range of D-BEAM controller will 
become extremely small when used under 
strong direct sunlight. Please be aware of this 
when using the D-BEAM controller outside.
•  The sensitivity of the D-BEAM controller 
will change depending on the amount of 
light in the vicinity of the unit. If it does not 
function as you expect, adjust the sensitivity 
as appropriate for the brightness of your 
location.
•  When operating an expression pedal, or 
opening and closing the USB memory cover, 
please take care not to pinch your ngers or 
toes between a moving part and the main 
unit. In places where small children are 
present, make sure that an adult provides 
supervision and guidance.