QSC Audio CMX 2000V user manual Fan Cooling, Safe Operating Levels, Troubleshooting

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Fan Cooling

The fan speed varies automatically to maintain safe internal temperatures. Keep the front and rear vents clear to allow full air flow. Hot air exhausts out the front of the amplifier so it does not heat the interior of the rack. Make sure that plenty of cool air can enter the rack, especially if there are other units which exhaust hot air into it. See (Figure 35).

Safe Operating Levels

The amplifiers protective muting system guards against excessive internal temperatures. With normal ventilation and 4 to 8 ohm loads, the amplifier will handle any signal level including overdrive‑but make sure that the speakers can handle the full power! However, lower load impedances and higher signal levels produce more internal heating. Into 2 ohm loads, frequent or prolonged clipping (indicated by constant flashing of the red CLIP LED) may trigger protective muting. Bridge mono mode doubles the output impedance of the amp; 4 ohms is the minimum load impedance. Heavy clipping may cause muting. If this happens, refer to the Troubleshooting, section.

Warm air exits the amplifier and rack.

Cool air enters the amplifier and rack.

— Figure 35 —

Troubleshooting

Problem: No Sound

Indication: POWER indicator not lit

Check the AC plug. Also check the circuit breaker on the rear panel.

Confirm that the AC outlet works by plugging in another device. If too many amplifiers are used on one outlet, the building’s circuit breaker may trip and shut off power.

An overload in Bridged Mono mode may cause the amplifier to click off for several seconds. Check the load impedance (4Ω minimum), or reduce signal level.

An amplifier which keeps shutting off may have a serious internal fault. Turn it off, remove AC power, and have the amplifier serviced by a qualified technician.

Indication: SIGNAL LED responding to signal level

If the green SIGNAL indicators are lighting normally, the fault is somewhere between the amp and the speaker. Check the speaker wiring for breaks. Try another speaker and cable.

Indication: SIGNAL LED not lit

If the green POWER indicator LED is lit and the fan is running, yet the signal LEDs indicate no signal, check the input. Make sure the signal source is operating and try another input cable. Connect the source to another channel or amplifier to confirm its operation.

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Contents CMX 2000V Amplifier TD‑000323‑00Important Safety Precautions and Explanation of Symbols Disclaimer QSC Audio Products 3-Year Limited WarrantyIntroduction FeaturesRack Mounting UnpackingBack Panel Front Panel FigureSetting the Mode Switches Features and SetupAttenuation Control Security Plate Clip LimiterInput Low‑Frequency Filter What it is Parallel Inputs ModeBridge Mono Mode Parallel Inputs Mßode Stereo ModeDifference Between Modes Distributed Constant Voltage Outputs Bridge Mono ModeInputs ConnectionsBalanced Inputs Unbalanced InputsSpeaker Cabling Speakon OutputsTerminal Block Connector LED Indicators AC Power SwitchOperation Attenuation ControlsSafe Operating Levels TroubleshootingFan Cooling Indication Clip LED flashing Problem Distorted Sound Indication Clip LED flashingProblem Squeals and feedback CMX SpecificationsPin 2 positive Output Detachable terminal block and SpeakonMailing Address Info@qscaudio.com Service@qscaudio.comTelephone Numbers Facsimile NumbersAmplificateur CMX Série CMXAvertissement QSC Audio Products garantie limitée de 3 ans Avis de non-responsabilitéCaractéristiques Déballage Installation sur bâtiPanneau avant Figure Voyant dalimentation PowerPanneau arrière Bouches daérationPlaque de sécurité de commande datténuation Fonctions et configurationRéglage des commutateurs de mode Limiteur d’amplitudeFiltre de basses fréquences dentrée Mode Parallel Inputs Entrées parallèles Précautions liées au mode Bridge Mono Mode Bridge Mono Mono pontDifférence entre les modes Mode StereoMode Parallel Inputs Entrées parallèles Sorties de tension constante distribuée Mode Bridge Mono Mono pontEntrées BranchementsEntrées équilibrées Entrées déséquilibréesCâblage des haut-parleurs Sorties SpeakonCâblage du connecteur de bornier Connecteur de bornierCommandes datténuation Mode demploiInterrupteur de marche/arrêt VoyantsIndication Voyant Signal éteint Indication Le voyant Signal répond au niveau de signalVentilateur de refroidissement Niveaux dutilisation sûrsProblème Pas de séparation des canaux Caractéristiques techniques Téléphone AdresseTélécopieur Site Web CourrielVerstärker CMX Serie CMXAchtung Beschränkte Dreijahresgarantie durch QSC Audio Products HaftungsausschlussFunktionsmerkmale EinführungRack-Einbau AuspackenEntlüftungsschlitze RückplatteStrom-Ein-LED Schutzmodus-LED Netzschalter DämpfungsreglerDämpfungsregler-Sicherheitsplatte Funktionsmerkmale und SetupEinstellen der Betriebsartenschalter Clip-LimiterTiefpass-Eingangsfilter PARALLELEINGANGS-Modus Vorsichtsmaßnahmen im MONO-BRÜCKEN-Modus MONO-BRÜCKEN-ModusPARALLELEINGANGS-Modus Unterschiede zwischen den BetriebsartenSTEREO-Modus Verteilte, konstante Spannungsausgänge MONO-BRÜCKEN-Modus70-/100-V-Betrieb STEREO-Modus beide Kanäle angesteuert 2500 WEingänge VerbindungenSymmetrische Eingänge Asymmetrische EingängeLautsprecherverkabelung Speakon AusgängeKlemmleistenanschlusses KlemmleistenanschlussVerkabelung des Netzschalter BedienungDämpfungsregler LED-AnzeigenSymptom SIGNAL-LED leuchtet nicht Symptom SIGNAL-LED spricht auf Signalpegel anLüfterkühlung Sichere BetriebspegelProblem Tonverzerrungen Symptom CLIP-LED blinkt Symptom CLIP-LED blinktSymptom CLIP-LED blinkt nicht Problem Keine KanaltrennungTechnische Daten Fax-Nummern TelefonnummernInternet Mail Verkauf und Marketing +1 714 Kundendienst Fax +1 714CMX 系列 重要的安全注意事项和符号说明 警告! QSC Audio Products 3 年有限质保 免责声明FTC:20 Hz‑20 kHz @ 0.1% THD 机架安装 后面板 设置模式开关 衰减控制安全板输入低频过滤器 并行输入模式 桥式单声模式 立体声模式 模式间的差异桥式单声模式 非平衡输入: 输入端扬声器布线 Speakon 输出接线盒连接器 衰减控件 交流电源开关LED 指示灯 工作电压 (交流电源)故障排除 风扇冷却安全操作级别 Page 4Ω/EIA 1 KHZ/1% THD 电话: 通信地址:传真: 网址: 电子邮件:Amplificador CMX ¡ADVERTENCIA Garantía limitada de 3 años de QSC Audio Products Renuncia de responsabilidadCaracterísticas IntroducciónMontaje en estante DesembalajePanel posterior Panel frontal FiguraIndicador LED de encendido Interruptor eléctricoPlaca de seguridad de control de la atenuación Características y configuraciónAjuste de los conmutadores de modo Limitador de recorteFiltro de entrada de baja frecuencia Modo de entradas paralelas Parallel Inputs Modo monofónico puenteado Modo de entradas paralelas Parallel Inputs La diferencia entre modosModo estereofónico Estereo Salidas de voltaje constante distribuido Modo monofónico puenteado Bridge MonoOperación a 70 / 100 voltios Modo monofónico puenteado Bridge Mono Voltios 5000 WEntradas ConexionesEntradas balanceadas Entradas no balanceadasCableado del altavoz Salidas SpeakonDe terminales Conector del bloque de terminalesCableado del conector del bloque Interruptor eléctrico de CA OperaciónControles de atenuación Indicadores LEDIndicación No está iluminado el LED Signal Resolución de problemasEnfriamiento con el ventilador Niveles seguros de operaciónProblema No hay separación entre los canales Especificaciones Números de teléfono Dirección postalNúmeros de fax World Wide Web Dirección electrónica