Yamaha XP2500 - Manual (Page 6)

6
XP7000/XP5000/XP3500/XP2500/XP1000 Owner’s Manual
Controls and Functions
■ Front Panel
1
POWER switch and indicator
Press this to turn the power on or off. The POWER/
STANDBY indicator lights up in green when the power
is ON. If the amplifier has been set to STANDBY mode,
the indicator is lit in orange.
2
TEMP indicator
Lights up red if the heat sink temperature exceeds 85°C
(185°F).
3 PROTECTION indicator
When the protection system is active, the PROTECT
indicator light up in red and the speakers are automati-
cally disconnected from the amplifier’s outputs. The
protection system activates in the following situations:
When the amplifier is turned on
The protection system activates for approximately
three seconds when the amplifier is turned on. After
three seconds, the protection system deactivates auto-
matically and the amplifier is ready for normal opera-
tion.
If a DC voltage is detected at the amplifier’s
outputs
XP7000/5000: Power shut down and the indicator is
not lit.
XP3500/2500/1000: The protection system is active.
Once the DC voltage problem is corrected, the protec-
tion system deactivates automatically and the ampli-
fier is ready for normal operation.
If the amplifier overheats
When overheating occurs, the PROTECT/MUTE
indicator lights. You should immediately turn off the
amplifier and allow it time to cool down. See the Pre-
cautions section of this Owner’s Manual for ways to
prevent the amplifier from overheating.
4 CLIP indicator
Lights up red when the output signal distortion on the
corresponding channel rises above 1% — indicating
that “clipping” has occurred bacause the signal level is
too high.
5
SIGNAL indicator
Lights up green when the corresponding channel’s out-
put level exceeds 2 Vrms (equivalent to 1/2 W into an 8
Ω load, or 1 W into a 4 Ω load).
6 Volume control knobs
Each control knob adjusts the volume of the corre-
sponding channel, in 31 steps from -
∞ dB to 0 dB.
* If you wish to lock in the knob settings, you can
fasten the supplied security cover over the
knobs so that the settings will not be disturbed.
● How to install the security cover
(1) Use the supplied hex wrench to remove the four
attachment screws from the amplifier.
(2) Adjust the security cover to the position of screw
holes. Fasten it into place using the same screws.
7 Air intakes
The amplifier uses forced-air cooling. The cooling fans
draw air in from the front and exhaust it through the
rear. Please be sure that you do not block the air intakes
or exhaust vents.
* The fans do not come on at initial power-on, but
will switch on automatically when the temperature
of the heat sink rises above 50°C (122°F). The fan
speed will then vary automatically as the tempera-
ture changes.
* The illustration shows model XP7000.
1 7 6
2
3 7
4
5
Front Rear
Air
exhaust
Air
intake