Mark Levinson 434 Owner's Manual page 9

Nº436/434
In addition, the Nº436/434 uses state-of-the-art protections to
guard against the following fault conditions:
• Signal-related faults, including the presence of DC (direct
current) signals at the output and demands for excessive
current at the output (indicating a short-circuit). If a signal-
related fault is detected, the front panel indicator LED blinks
rapidly, remaining lit and unlit for equal intervals. The
Nº436/434 shuts itself down to protect itself and associated
loudspeakers. To restore normal operation, remove the source
of the fault. Then, power cycle the Nº436/434 using the
power button.
• Power-related faults, including over or under-voltage (±10%)
conditions at the ~ac mains connector. If AC mains voltage is
too high or too low for safe operation, the front panel indicator
LED blinks rapidly, remaining lit for longer intervals. Normal
operation will not be restored until AC mains voltage falls
back into a safe operating range.
For example, a 120V model of the Nº436/434 will operate
from approximately 108-132V, while a 240V model of the
Nº436/434 will operate from approximately 216-264V. Outside
of these limits, the Nº436/434 will activate sleep mode. When
AC mains voltage returns to the safe operating range, the
Nº436/434 can be taken out of sleep mode using the standby
button.
• Thermal-related faults, such as if the Nº436/434 becomes over-
heated. The front panel indicator LED blinks rapidly, remain-
ing unlit for longer intervals. The Nº436/434
automatically activates sleep mode and remains in sleep
mode until output heat sink temperatures drop below 85˚C
(185˚F or 358K). When temperatures return to a safe operating
range, the Nº436/434 can be taken out of sleep mode using
the standby button.
Getting Started
1-3