Yamaha XM4180 Owner's Manual - Page 6
Controls and Functions, Front Panel - power
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Controls and Functions ■ Front Panel 432 1 6 1 POWER/STANDBY switch and indicator This is the main POWER switch. Press to turn on the amplifier. Press it again to turn off. The POWER indicator lights up when the amplifier it turned on. STANDBY operation can only be set from an external device, connected to the REMOTE terminal. When STANDBY is on, the indicator is lit in orange. 2 PROTECT/MUTE indicator When the protection system is active, the PROTECT indicator lights up and the speakers are automatically 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 automatically and the amplifier is ready for normal operation. If a DC voltage is detected at the amplifier's outputs The protection system activates if a DC voltage is detected at the amplifier's outputs. Once the DC voltage problem is corrected, the protection system deactivates automatically and the amplifier 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 Precautions section of this Owner's Manual for ways to prevent the amplifier from overheating. 3 CLIP/LIMIT indicator A channel's CLIP indicator lights up when its output distortion exceeds 1% (i.e., clipping). Output signal clipping is typically caused by excessive input signal levels. When this happens, the limiter is engaged automatically. 4 SIGNAL indicator A channel's SIGNAL indicator lights up when its output exceeds a certain amount (2V rms on the XM4180/ XM4080, 4V rms on the XH200.) 6 XM4180/XM4080/XH200 Owner's Manual 5 * The illustration shows model XM4180. 5 VOLUME controls The channel volume controls have click detents for the settings, and each channel can be set over a range of -∞ dB to 0 dB. On the XM4180 and XM4080, when the amplifier is set to bridged mode, only the first volume control on each channel pair is used (i.e., for the A/B pair, channel A is active, and for the C/D pair, channel C is active). 6 Air intakes The amplifier has a forced-air cooling fan that takes in air from the front and exhausts it from the rear. Make absolutely sure that these intakes are not obstructed. Front Rear Air intake Air exhaust Security cover If you want to keep the volume settings from being modified, attach the included security cover using the screw holes shown below, so that the volume controls are inaccessible. * The illustration shows model XM4180/XM4080. 4
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