Power; Power - Grounding Information - ENSONIQ DP/4 Musician's Manual

Introduction
Power
Insert the line cord into the line receptacle on the rear panel of the DP / 4. Plug the other end of
the cable into a grounded AC outlet. (The proper voltage for your DP / 4 is listed on the Serial
Number label on the rear panel.) Tum the DP / 4 power on and make sure the display lights up.
H not, check your connections and power source.
Power - Grounding Information
ii
Like many modem electrical devices, your ENSONIQ product has a three-prong power cord with
earth ground to ensure safe operation. Some products have power cords with only two prongs
and no earth ground. To ensure safe operation, modem products with two-prong power cords
have polarized plugs which can only be inserted into an outlet the proper way.
Some products, such as older guitar amplifiers, do not have polarized plugs and can be connected
to an outlet incorrectly. This may result in dangerous high voltages on the audio connections that
could cause you physical harm or damage any properly grounded equipment to which they are
connected, such as your ENSONIQ product.
To .avoid shock hazards or equipment damage, we recommend the following precautions:
• H you own equipment with two pronged power cords, check to see if they are polarized or
non-polarized. You might consider having an authorized repair station change any non-
polarized plugs on your equipment to polarized plugs to avoid future problems.
Polarized
Non-polarized
• Exercise caution when using extension cords or plug adapters. Proper polarization should
always be maintained from the outlet to the plug. The use of polarized extension cords and
adapters is the easiest way to maintain proper polarity.
• Whenever possible, connect all products with grounded power cords to the same outlet
ground. This will ensure a common ground level to prevent equipment damage and
minimize hum in the audio output. .
AC outlet testers are available from many electronic supply and hardware stores. These can be
used to check for proper polarity of outlets and cords.
ENSONIQ DP/4 Musician's Manual