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Фрагмент инструкции
< 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 extended length of time, the coils in the attached speakers will eventually burn out (or, in extreme cases, catch fire). The P1000 can detect this condition, and cut the current to the speakers. DC offset faults can occur intermittently in all set-ups, particularly if a tuner or satellite receiver is connected. If it occurs frequently or predictably, please contact your dealer for advice. Technical specification All measurements are with 230V/50Hz mains powerContinuous output power All channels driven, 20Hz—20kHz, 8. 135W per channel; 945W total All channels driven, 20Hz—20kHz, 4. 210W per channel; 1.47kW total One or two channels driven at 1kHz, 8. 190W per channel One or two channels driven at 1kHz, 4. 305W per channel One or two channels driven at 1kHz, 3.2. 325W per channel Peak output current capability ±20.5A per channel Total harmonic distortion At any level up to rated power, into 4 or 8. <0.08% maximum (20Hz—20kHz); typically <0.007% at 1kHz Frequency response ±0.2dB (2Hz—50kHz) –1dB at 1Hz and 100kHz Residual hum and noise Ref. full power –110dB A weighted, or 100dB CCIR Voltage gain User selectable: A: x31.5dB B: x29dBC: x26dB Input impedance 22k. in parallel with 180pF Output impedance 20m. at 20Hz, 1kHz80m. at 20kHz Power requirements 115V or 230VAC, 50/60Hz, 2.2kW maximum via IEC mains inlet. A zero-crossing AC system eliminates large ‘transformer’ in-rush currents at switch on. Physical Dimensions: W430 x D400 x H133 mm Mass: 18kg (40 lb) net; 21kg (46 lb) packed E&OE Continual improvement policy Arcam has a policy of continual improvement for its products. This means that designs and sp...
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