JBL MPA1100 Manuals

Power Amplifiers MPA Series MPA275 P r o f e s s i o n a l A m p l i f i e r Clip -10dB -20dB Signal Present Clip -10dB -20dB Signal Present Power Protect 1-CHANNEL-2 18 10 8 6 4 12 14 24 0 2 48 18 10 8 6 4 12 14 24 0 2 48 MPA400 P r o f e s s i o n a l A m p l i f i e r Clip -10dB -20dB Signal Present Clip -10dB -20dB Signal Present Power Protect 1-CHANNEL-2 18 10 8 6 4 12 14 24 0 2 48 18 10 8 6 4 12 14 24 0 2 48 MPA600 P r o f e s s i o n a l A m p l i f i e r Clip -10dB -20dB Signal Present Clip -10dB -20dB Signal Present Power Protect 1-CHANNEL-2 18 10 8 6 4 12 14 24 0 2 48 18 10 8 6 4 12 14 24 0 2 48 Clip -10dB -20dB Signal Present Clip -10dB -20dB Signal Present Power Protect 1-CHANNEL-2 18 10 8 6 4 12 14 24 0 2 48 18 10 8 6 4 12 14 24 0 2 48 MPA750 P r o f e s s i o n a l A m p l i f i e r Clip -10dB -20dB Signal Present Clip -10dB -20dB Signal Present Power Protect 1-CHANNEL-2 18 10 8 6 4 12 14 24 0 2 48 18 10 8 6 4 12 14 24 0 2 48 MPA1100 P r o f e s s i o n a l A m p l i f i e r Owner’s Manual MPA275 MPA400 MPA600 MPA750 MPA1100 1 Rack Mounting Precautions To avoid damage to the amplifier mounting ears and/or rack rails, the amplifier must be supported at all four corners when used in portable racks. Consult JBL Service Dept for availability of Rear Support Brackets. Lifting Precautions In order to safely move or install the amplifier, it is recommended that two persons share the weight when lifting and positioning the unit. Sicherheitsvorschriften für den Einbau in ein Gestell Um Schäden auf den Befestigungsleisten des Verstärkers und/oder den Gestellschienen zu vermei- den, muß der Verstärker beim Einbau in ein trag- bares Gestell an allen vier Ecken gestützt werden. Erkundigen Sie sich bei der JBL- Kundendienstabteilung nach Stützen für die Rückseite des Verstärkers. Sicherheitsvorschriften beim Hochheben Um den Verstärker sicher zu verschieben oder einzubauen, wird empfohlen, das Gewicht des Verstärkers beim Hochheben und Verschieben gleich- mäßig auf zwei Personen zu verteilen. Cautions Sicherheitsvorschriften WARNUNG: ZUR VERMEIDUNG VON FEUER ODER ELEKTRISCHEN SCHLÄGEN DAS GERÄT NICH MIT REGEN ODER FEUCHTIGKEIT IN BERÜHRUNG BRINGEN. WARNING: TO PREVENT FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. Erklärung der graphischen Symbole Der Blitz mit nach unten zeigendem Pfeil in einem gleichseitigen Dreieck weist den Benutzer auf das Vorhandensein einer unisolierten, “gefährlichen Spannung” im Gehäuse hin, die stark genug sein kann, einer Person einen elektrischen Schlag zu ver- setzen. Das Ausrufezeichen in einem gleichseitigen Dreieck weist den Benutzer auf nichtige Betriebs - und Wartungsvorschriften in den Beiliegenden Unterlagen des Geräteshin. CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE THE COVER. NO USER- SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. VORSICHT: UM DAS RISIKO EINES ELEKTRISCHEN SCHLAGES ZU VERMINDERN, ABDECKUNG NICHT ENTFERNEN. KEINE BENUTZER BEDIENUNGSTEILE IM INNERN. BEDIENUNG NUR DURCH QUALIFIZIERTES BEDIENUNGSPERSONAL. To reiterate the above warnings: servicing instruc- tions are for use by qualified personnel only. To avoid electric shock, do not perform any servicing other than that contained in the Operation Instructions unless you are qualified to do so. Refer all servicing to qualified service personnel CAUTION RISK OF ELECTRIC SHOCK: OPEN ONLY IF QUALIFIED AS SERVICE PERSONNEL Eindrigliche Warnung: Wartungsvorschriften dienen nur der Benutzung durch qualifiziertes Personal. Zur Vermeidung eines elektrischen Schlages keine anderen als die in den Betriebsvorschriften beschriebenen Wartungsarbeiten ausführen, es sei denn, Sie sind dafür qualifiziert. Wartungsarbeiten sind von qualifiziertem Wartungspersonal auszuführen. Explanation of Graphical Symbols The lightning flash with arrowhead symbol, within an equi- lateral triangle, is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to humans. The exclamation point within an equilateral triangle is intended to alert the users to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the product. V O R S I C H T GEFAHR EINES ELEKTRISCHEN SCHLAGES NICHT ÖFFNEN V O R S I C H T GEFAHR EINES ELEKTRISCHEN SCHLAGES: NUR VON QUALIFIZIERTEM WARTUNGSPERSONAL ZU ÖFFNEN V O R S I C H T UM ELEKTRISCHEN SCHLAG ZU VERMEIDEN, KEINE FINGERN ODER GEGENSTÄNDE IN ÖFFNUNGEN DES GEHÄUSES STECKEN. C A U T I O N TO AVOID ELECTRIC SHOCK, DO NOT INSERT FINGERS OR OBJECTS INTO ANY OPENINGS IN THE CABINET. 2 Cautions .................................................................................................................1 Unit Description ....................................................................................................3 General Information....................................................................................................3 Open Input Architecture™ Slots.................................................................................3 Feature Identification...................................................................................................4 Installation .............................................................................................................5 Inputs ...........................................................................................................................5 Outputs ........................................................................................................................5 Input Connections .......................................................................................................6 Changing XLR Polarity.................................................................................................7 To Parallel the Inputs ..................................................................................................7 Bridged Mono Mode ...................................................................................................8 AC Power Connection.................................................................................................9 Operation .............................................................................................................10 Controls......................................................................................................................12 Gain Control Lockout................................................................................................12 Displays......................................................................................................................12 Typical Power Up, Operation, Power Down Behavior...........................................12 Maximum Long-Term Output Power........................................................................14 Protection Circuits......................................................................................................14 Specifications.......................................................................................................16 Power Output Ratings ...............................................................................................17 Troubleshooting ..................................................................................................19 Illustrations Figure 1. Open Input Architecture Slots.....................................................................3 Figure 2. Rear and Front Views of 2-Space High Amplifiers ....................................4 Figure 3. Rear and Front Views of 3-Space High Amplifiers ....................................4 Figure 4. Neutrik Speakon Connector Wiring for Speaker Outputs.........................5 Figure 5. Typical Unbalanced Connection.................................................................6 Figure 6. Portable Balanced System ...........................................................................6 Figure 7. Installed Balanced System...........................................................................6 Figure 8. Ground Bus Connection..............................................................................6 Figure 9. Jumper Positions for XLR Polarity Reversal................................................7 Figure 10. Switch Settings for Bridged Mono Operation...........................................7 Figure 11. Connection Options of Speaker Load for Bridged Mono ......................8 Figure 12. Speakon Connection Details for Bridged Mono Operation. ...................8 Figure 13. Gain Control Lockout...............................................................................12 Figure 14. LED Displays During Normal Operation................................................13 Figure 15. LED Displays During Abnormal Operating Conditions .........................13 Tables Table 1. JBL MPA Series AC Power Consumption versus Load Impedance With 110, 115 & 120 V Mains ..............................9 Table 2. JBL MPA Series AC Power Consumption versus Load Impedance With 220, 230 & 240 V Mains.............................10 Table 3. LED Display Operation...............................................................................11 Table 4. Output Ratings With 110, 115 and 120 V Mains........................................16 Table 5. Output Ratings With 110, 115 and 120 V Mains........................................17 Table of Contents 3 The MPA275, MPA400, MPA600, MPA750 and MPA1100 are high-efficiency profession- al power amplifiers, with two independent channels, respectively capable of deliver- ing 275, 400, 600, 750 and 1100 watts into a four ohm load (per channel), and substantially more power into lower impedance loads. Semi-toroidal power trans- formers (one per channel in the MPA750 and MPA1100) are mounted in each front corner, as close as possible to the rack ears and rails. The rear panels are 16.9 inches behind the front mounting plane, so an extra rack depth allowance (i.e., more than 18 inches) will be needed to clear XLR or Speakon connections. The built-in fan cooling takes air in the rear, exhausting through front vents. Due to the flow-through cooling, amplifiers may be racked with zero clearance in between, which also helps support the weight. Rear support within the rack must be used in portable applica- tions. Open Input Architecture™ Slots Provided with each MPA Series amplifier is a standard input module. This module and the upper input cover panel can be removed, permitting future upgrades. Internally, a ribbon cable runs behind both of these “slots.” The ribbon cable con- nects to the rest of the amplifier and carries several levels of DC power, and (for each channel) the input signals, speaker output monitor, muting status, clip activity, ther- mal status, and power-on status. These signals are provided to support future remote control and monitoring schemes as they become available. The JBL Marketing depart- ment will be happy to entertain suggestions for input modules. The “standard input board” which is shipped with each amplifier has balanced XLR and barrier strip inputs, bridging and input-parallel switches, and footprints for passive rolloffs and popular input isolation transformers (more info is available on request). Unit Description Figure 1. Open Input Architecture Slots.