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Nº433 Power Amplifier
4. No audio and the front-panel indicator LED is blinking
rapidly, remaining lit most of the time.
•A power-related fault is present (~ac mains voltage is too high
or too low).
• Power cycle the Nº433 with the power button, waiting at least
five minutes between powering the Nº433 off and on.
• Contact an authorized Mark Levinson dealer.
5. No audio and the front-panel indicator LED is blinking
rapidly, remaining lit about half of the time.
•A signal-related fault condition is present, probably either a DC
offset or an over-current condition. If this occurs:
a. Power the Nº433 off with the power button.
b. Disconnect the input signal and loudspeaker wires.
c. Wait five minutes.
d. Power the Nº433 on with the power button.
e. Bring the unit out of standby by pressing and releasing the
standby button.
If the Nº433 powers on, repeat these steps; reconnect input
signal and loudspeaker wires one at a time to determine what is
causing the fault condition. Remember to power the Nº433 off
with the power button before making or breaking connections.
If the Nº433 does not power on, there is an internal failure.
Contact an authorized Mark Levinson dealer.
6. No audio and the front-panel indicator LED is blinking
rapidly, remaining unlit most of the time.
•A thermal-related fault condition is present, which causes the
Nº433 to enter sleep mode. Once the heat sinks have cooled
below 85°C (158°F or 358K), the Nº433 can be taken out of sleep
mode with the standby button.
7. No audio and the front-panel indicator LED is lit at full
brightness.
• The Nº433 is powered on, but is not passing a signal. Examine
signal cables to ensure a solid connection between the Nº433
and the associated preamplifier and loudspeakers.