Assessments - 3, GPA: 3
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Facilidade de uso
Sound is poor or distorted If the sound coming from your P1000 is distorted, or is weak in some way (lacking in bass), please check the following items. < Ensure that all cables (both interconnects and speaker cable) are making a good connection. Turn the P1000 off, withdraw each cable from the connector and plug it back in again. Switch the P1000 back on to see if the sound quality has improved. < Check that you have selected the correct size of speakers to suit your system in the setup menu of the processor or pre-amp. Setting speakers to “Small”, for example, may be the cause of weak bass. See the handbook of your pre-amp./processor for details. Sound comes only from some of the speakers If sound is coming from some speakers only (but those speakers are operating normally), please check the following items. < Are all speakers in the system connected to the P1000? < Have you configured your pre-amp. to include all the speakers in your system? See the handbook of your pre-amp./processor for details. < Do you have an appropriate surround-sound source selected and playing through the pre-amp? < For sources connected digitally to the pre-amp., check that the source is putting multi-channel data out. Some DVD players (for example) allow selection of the output format and also whether multi- channel data is down-mixed to PCM (stereo). See the handbook of your source for details. < Ensure that the disc you are playing is a multi-channel recording and that the processor is putting multi-channel audio out. < Check that your speaker balance is correct (see your pre-amp./processor handbook for details). < Are all the channel-indicator LEDs on the front panel green? Refer to the table on page 10 if you see other colours. Hum on an amplifier output If you have a “hum” coming from one of the speakers, please check the following items. < Does the hum originate from a ground loop caused by an aerial, satellite dish or cable supply (if the aerial is disconnected, does the humming stop)? Please contact your dealer or aerial contractor for further advice. < Ensure that the interconnect and speaker leads are not wrapped around a mains lead. < Try switching the ground lift on the pre-amp./processor, if available (see the handbook of your pre- amp. for details). See also “Sound is poor or distorted”, above. There is radio/television reception interference If you find that radio or television interference is present when the P1000 is switched on, but disappears when it is switched off, ensure that the aerial/dish cable to your TV or receiver is routed away from your P1000 and its cabling, and that the cabling used from the aerial/dish is of a high-quality (screened). Repositioning the receiving aerial/dish may bring an improvement. < If you are unable to rectify the fault after checking the items suggested above, please contact your dealer for advice. Fault status indicators The light patterns described below indicate the following fault conditions: Light pattern Description Amplifier action All lights are green. This is the normal operating state of the amplifier. None. The power light is amber and the channel lights are off. A “DC offset” fault has occured. A DC offset fault can occur if an excessive DC voltage is present at the output of the pre-amp. feeding the P1000. Please see the note below. The condition does not clear automatically. Simply to clear the fault, turn the P1000 off for at least 30 seconds (using the switch on the rear of the unit), then turn it on again. If the fault fails to clear using this method, or to verify excessive DC offset voltage, turn the P1000 off using the switch on the rear of the unit, remove the interconnect leads (with the P1000 switched off), then turn the P1000 on again. The fault should have cleared; if the power light is still amber then your P1000 has developed a fault. Switch the unit off and contact your dealer. One or more channel lights are flashing amber/green. A short-circuit fault has occured. The flashing light(s) represent the amplifier channels with the short-circuit. The amplifier mutes the channel with the short-circuit. If the fault is cleared, the amplifier will resume normal operation. Note that audio must be fed to the channel for the short-circuit to be detected. For example, muting the output using your pre-amp. will make the fault appear to clear; it is likely that the fault condition will re-occur when the pre-amp. is unmuted, however, unless further action is taken. One or more channel lights are amber. An over-temperature fault has occured on a channel with the amber light. The amplifer mutes the channel with the fault. The amplifier stays in this state until the channel has cooled. If this fault occurs frequently, ensure that the amplifier has adequate ventilation. DC offset faults A “DC offset fault” is not an amplifier fault, but a speaker protection mechanism. If the amplifier is supplied with a DC voltage (rather than the expected AC voltage) for an extende...
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