Power Requirements; Connecting Headphones (Phones/Output Jack); Connecting A Footswitch (Sustain Jack) - Yamaha Portable Grand DGX-640 Owner's Manual

Be sure to do the following operations BEFORE turning on the power.

Power Requirements

1
Make sure that the [ ](Standby/On) switch of the
instrument is in the "Standby" position.
WARNING
• Use the specified adaptor (page 112). The use of other
adaptors may result in irreparable damage to both the
adaptor and the instrument.
2
Connect the AC adaptor to the power supply jack.
3
Plug the AC adaptor into an AC outlet.
CAUTION
• Unplug the AC Power Adaptor when not using the
instrument, or during electrical storms.
Make all necessary connections below BEFORE turning the power on.

Connecting Headphones (PHONES/OUTPUT Jack)

Any pair of stereo headphones with a 1/4" stereo
phone plug can be plugged in here for convenient
monitoring. The speakers are automatically shut off
when a plug is inserted into this jack.
The PHONES/OUTPUT jack also functions as an
external output. You can connect the PHONES/OUT-
PUT jack to a keyboard amplifier, stereo system,

Connecting a Footswitch (SUSTAIN Jack)

The sustain function lets you produce a natural sustain
as you play by pressing a footswitch. Plug the sup-
plied footswitch into this jack and use it to switch sus-
tain on and off.
2
AC power
adaptor
mixer, tape recorder, or other line-level audio device
to send the instrument's output signal to that device.
WARNING
• Avoid listening with the headphones at high volume for
long periods of time; doing so may not only result in ear
fatigue, it may be damaging to your hearing.
CAUTION
• To prevent damage to the speakers, set the volume of the
external devices at the minimum setting before connecting
them. Failure to observe these cautions may result in elec-
tric shock or equipment damage. Also, be sure to set the
volumes of all devices at their minimum levels and gradu-
ally raise the volume controls while playing the instrument
to set the desired listening level.
NOTE
• The sustain function does not affect split voices.
• Make sure that the footswitch plug is properly connected to
the SUSTAIN jack before turning on the power.
• Do not press the footswitch while turning the power on. Doing
this changes the recognized polarity of the footswitch, result-
ing in reversed footswitch operation.
Setting Up
3
AC outlet
13
Owner's Manual