Troubleshooting - Classe Audio Delta MONO Owner's Manual

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 Standby LED is not 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 line voltage supplying
the amplifier.
2. No sound, and Standby LED is blinking red.
• The protection circuitry has been engaged.
• Press and hold the standby button to reset the amplifier.
• If the amplifier does not reset or continues to go into protection
mode, disconnect the amplifier from the AC mains, and
disconnect all inputs and outputs.
• Try to power up the amplifier again, connecting it only to AC
power. If the LED continues to blink, there is a fault condition
in the amplifier itself and it should be disconnected and taken to
your Classé dealer for service.
• If it powers up without any difficulty, first power it back down
and reconnect only the inputs, then restart the amplifier. If
it again powers up normally, there may be a problem such as
shorted speaker leads. Check the connections to confirm there
are no obvious shorts, then connect first one channel, followed
by the other, to confirm either that there is no longer a shorted
lead or if there is, which channel is shorted.
3. The amplifier keeps shutting off.
• If the shut down occurs after approximately 20 minutes being
idle, it is likely that the Auto Standby power saving feature
is enabled. With very low signal levels the amplifier may not
reliably detect them, allowing Auto Standby to engage. To
determine its state or disable Auto Standby, see the Auto Standby
section of this manual.
• 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).
• The amplifier logs all protection circuit events--these are viewable
on the touchscreen of a CAN-Bus connected Classé component
or by your dealer on a PC using a special diagnostic program.
Contact your dealer to assess the likely cause of the trouble.
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