Troubleshooting - Classe CA-M400 Manual De Instrucciones

Troubleshooting

In general, you should refer any service problems to your Classé dealer. Before
contacting your dealer, however, check to see if the problem is listed here.
1. No sound, and no Channel LED is lit.
• The amplifier is not plugged into the AC mains, or the AC
mains are down (circuit breaker, fuse).
• A brown-out or short-term loss of power might require the
internal microprocessor to be reset. Unplug the unit for at least
30 seconds and then plug it in again and try powering it up.
• The AC mains fuse is blown. See Troubleshooting #4, below (or
contact your Classé dealer).
• The AC mains is out of range. Check the voltage specified on
the rear panel.
2. No sound, and a Channel LED is blinking red.
• Your protection circuitry may have been engaged. To reset the
amplifier, press and hold the Standby button for 3 seconds
to power down the amplifier. Then disconnect all inputs and
outputs.
• Then try powering up the amplifier by pressing the Standby
button. If the LED continues to blink, there is a fault condition
in the amplifier itself. It should be powered down, disconnected
from the AC mains and taken to your Classe dealer for service.
• If it powers up without any difficulty, power it back down and
reconnect only the inputs. Then restart the amplifier. If it goes
into its blinking protection mode, something is wrong with a
component "upstream" of the amplifier—probably a DC offset
or similar problem. Your amplifier is trying to protect your
loudspeakers (even small amounts of DC can damage woofers in
relatively little time). Try different source components to discover
whether the problem is limited to a single source, or exists all the
time (which would indicate a problem with the preamplifier).
Contact your dealer for help with the appropriate component.
3. The amplifier keeps shutting off.
• Make sure you are providing adequate ventilation to the
amplifier, and that the ambient room temperature is below
105°F (40°C).
• Run through the troubleshooting sequence outlined above
(assuming the amplifier is going into its protection mode).
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