Protection Circuit - Classe Audio CA-200 Owner's Manual

PROTECTION CIRCUIT

The Classé CA-200 is equipped with rail fuses to protect the output drivers (GDB6, 6 amps
fast blow. fig.2, page 11) and mosfet fuses (2AG 1/2 PT, 1/2 amp fast blow) to protect the mosfets,
which are used as pre-drivers for the output stage of the amplifier. In the event that a short circuit or
other problems would occur at the output of the amplifier, one or more of these fuses may blow in an
attempt to protect the amplifier. In addition to the fuses, the unit has a circuit for the detection of
unusual distortion characteristics and/or DC content in the incoming audio signal. There is also an
AC line fuse protecting the unit. It is located at the back of the unit immediately above the AC
receptacle (see fig.1, page 10).
If the protection circuit of the unit is triggered or any of the fuses has blown, the FRONT
PANEL POWER LED will go to BLINKING GREEN, indicating a "fault" condition.
IF THE PROTECTION CIRCUIT HAS BEEN TRIGGERED, TURN THE CA-200 OFF.
.After the situation which has triggered the protection circuit has been clearly identified and
corrected, attempt to re-start the unit. IF THE UNIT STILL GOES INTO PROTECTION MODE,
OR IF IT APPEARS THAT PROTECTION FUSES DID BLOW, CONTACT YOUR LOCAL
DEALER. DO NOT TRY TO CHANGE A BLOWN FUSE. REPLACING A FUSE WITHOUT
CHECKING FOR COMPONENT FAILURE COULD RESULT IN FURTHER, SERIOUS
DAMAGE TO VITAL COMPONENTS IN YOUR AMPLIFIER. CONTACT YOUR LOCAL
DEALER or Customer Service at the Classé Audio, Inc ---(514) 636-6384.
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CA-200 ISSUE 3 DEC. '97