Classe Audio CA-M400 Owner's Manual page 25

4. The AC mains fuse is blown.
There is a specific troubleshooting procedure for a blown AC
mains fuse, since this rare occurrence sometimes indicates a signifi-
cant problem. Please follow the following steps, in order:
a. Disconnect your amplifier from the AC mains, as well as
from its input connections and speaker connections, and
remove the fuse cover on the rear of the unit.
b. If the fuse appears to be blown, replace it only with a fuse
of the same type and rating. Using any other type of fuse, par-
ticularly a larger-value fuse, can result in permanent damage to
your amplifier. If you are uncomfortable replacing the fuse
yourself, contact your Classé dealer for assistance.
c. After replacing the fuse and fuse cover, reconnect the am-
plifier to the AC mains only and turn it on without recon-
necting either the inputs or the speaker wires. If the fuse blows
again, disconnect it from the AC mains and contact your
Classé dealer for assistance.
d. If everything seems fine, place the amplifier back into
standby and carefully reconnect the input cable and power
the amplifier up. If the fuse then blows (or the amplifier
goes into protection), you may have a serious fault with
your preamplifier/processor. Contact your Classé dealer.
e. Finally, if everything is still fine, place the amplifier in
standby and carefully reconnect the speaker wires. Check
both ends of the speaker wires for possible short circuits.
Then power up the amplifier again. If the amplifier re-
mains functional (the fuse does not blow), then the origi-
nal fuse probably blew in order to protect the amplifier
from a large AC mains surge. If it blows again, contact
your Classé dealer for assistance.
5. The blue standby LED is flashing fast, and the channel LED is
flashing red.
✓ Try resetting the unit by disconnecting it from the AC
mains power, waiting a few seconds, and reconnecting the
amplifier to power. If this does not solve the problem,
contact your Classé dealer for assistance.
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