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AMPLIFIER CONDITION
The output mutes during
playback and the following
LEDs illuminate: Power
Stand-by, and
Regulator Bias
The amplifier switches to
stand-by mode and the
Power Stand-by LED
illuminates
The amplifier switches to
stand-by at high volumes
and the Power Stand-by
LED illuminates
The amplifier powers down
completely and no LEDs
illuminate
POSSIBLE CAUSES
Excessive DC at the
amplifier input
Electrical short in speaker
cables or inside speaker
Insufficient AC current from
the wall outlet
Excessive heat
DC present at the output
stage
Internal amplifier problem
COURSE OF ACTION
Have source unit and
preamplifier checked for high
DC output
If preamplifier is a tube
model, see Using a Tube
Preamplifier, on page 14.
Check all speaker cables for
any cuts or frayed edges that
might form a connection
between the positive and neg-
ative speaker binding post ter-
minals
Make sure the AC line is at
least 15 amps for 300cx and
350Mc amplifiers; 400cx,
450Mcx, 700cx, and 750Mcx
amplifiers should be
operated from a dedicated
20-amp line.
Allow amplifier to cool before
resuming operation. See
Placement, on page 4 for ven-
tilation requirements
Contact your authorized Krell
dealer, distributor, or Krell
Contact your authorized Krell
dealer, distributor, or Krell
18 Krell Full Power Balanced X Series Power Amplifiers
If the course of action listed in the table below does not correct the situation, please con-
tact your authorized Krell dealer, distributor, or Krell.