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Mark Levinson
Front Panel
The front panel contains one LED and one button, as shown.
Status LED
Indicates the operating state of the Nº53 and provides basic
diagnostic information when a fault condition occurs. Refer to the
table below for descriptions of LED behavior.
Refer to the “Troubleshooting” section in the back of the manual
for a description of the Status LED behavior when a fault is detected.
Standby Button
Places the Nº53 into Standby or Power Save mode, depending upon
the state of the rear panel Power Save Mode switch. Pressing the
Standby button while the amplifier is in Standby or Power Save
mode turns on the amplifier.
Standby mode provides full AC power to the amplifier but mutes
the outputs. Power Save mode powers only the low-voltage power
supply, control circuits, and communication circuits so that only
nonaudio functionality is available.
Note When the amplifier enters or exits Power Save mode, there’s an
extended initialization period before the amplifier is fully powered on.
During this period, additional Standby button presses are ignored.
LED Behavior Description
Fully lit Indicates that the amplifier is powered on.
Slowly blinking Indicates that the amplifier is in Standby mode.
Dimly lit Indicates that the amplifier is in Power Save mode
or, when the Power switch is turned on, that the
amplifier is initializing.
Not lit Indicates that the amplifier is powered off.
Standby
Status
LED
Front Panel