CX6, CX6T, CX12 and CX12T
When the amplifier is first turned on, the red “PROTECT” LED on each channel will light for about two or three seconds, during which the output relays will stay open to mute the speakers. After the
The “SIGNAL” LED indicates signal levels that are
Whe the amplifier is shut off, the amplifier should mute both channels virtually instantaneously, with the “PROTECT” indicators lit until the power supplies are discharged.
TROUBLESHOOTING
Problem: Channel will not come out of muting
•If reducing the gain control to × attenuation does not release muting, the channel is defective or overheated (see “Overheating,” below).
•If reducing the gain releases the muting, raise the gain back up slowly while you watch the “SIGNAL” and “CLIP” indicators; the problem may be an abnormal signal (with excessive ultrasonic energy, for example) that could otherwise damage your speakers.
PROBLEM: No sound (CX6/CX12)
•Is the channel muted? (If the “PROTECT” indicator is lit, the channel is muted; see below.)
•Is the “SIGNAL” LED lit or flashing? (If so, the speaker is open or blown, there is an open circuit in the speaker wiring, or there is an open circuit in the internal output wiring of the amplifier.)
•If the “SIGNAL” indicator is dark, there is probably not enough signal, or even none at all. Try turning up the rear panel attenuators or boosting the signal level at the input.
•If the “SIGNAL” indicator shows little or no activity but the “CLIP” LED is lit or flashing, there is probably a short circuit in the speaker wiring, especially if the “PROTECT” indicator starts flashing. It is also possible, but less likely, that the channel’s output relay is defective and will not open, thereby short- circuiting the channel output and producing the same symptoms.
PROBLEM: Channel goes into muting, with “PROTECT” LED on (CX6/CX12)
•If the fan is running full speed, the channel probably suffers from severe overheating. Unless there is a blockage in the flow of cooling air, the channel should return to normal within a minute or so (see “Overheating,” below).
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