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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 significant problem. Please
use 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. Check the fuse for continuity using an ohm meter, where the
resistance should be essentially zero ohms. If the fuse is “open”
or blown, replace it only with a fuse of the same type and rating
(specified below).
Using any other type of fuse, particularly a larger-
value fuse, can result in permanent damage to your amplifier.
If
you are not comfortable replacing the fuse yourself, contact your
Classé dealer for assistance.
Mains voltage:
100-120VAC
Fuse type:
IEC time lag, high breaking capacity
Rating:
8AH 250V
Mains voltage:
200-240VAC
Fuse type:
IEC time lag, high breaking capacity
Rating:
4AH 250V
c. After replacing the fuse and fuse cover, reconnect the amplifier to
the AC mains only and turn it on
without reconnecting 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 up the
amplifier. 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 remains functional (the fuse
does not blow), then the original 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.
6. The Standby LED is solid red and the VU Meter LED shows a
pulsing light pattern (
heartbeat
).
This is a normal reaction when the AC mains is abruptly interrupted or
turned off, instead of using the normal Standby procedure. The pulsing
LED shows a calibration period that lasts for 30 seconds after the AC
Mains has been re-established.
