User manual QSC AUDIO MX 700

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Manual abstract: user guide QSC AUDIO MX 700

Detailed instructions for use are in the User's Guide.

[. . . ] 5 MX 1000a . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 MX 1500a . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 MX 2000a . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 MX 3000a . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] CLASS 1 WIRING MUST BE USED BRIDGED MONO OPERATION: PLACE BRIDGING SWITCH ON INPUT PANEL TO BRIDGED POSITION. Shows signal is present Shows output capability is being exceeded, with clipping distortion Shows when the output is muted by protection circuitry. NO SIGNAL PWR SIG CLIP PROT The "PROT" indicator lights whenever the output is muted. At turn-on, the amplifier mutes for a few seconds; at turn-off, it mutes immediately and remains muted until the power supplies have drained. This is normal. Table 1: LED Display Operation NORMAL SIGNAL PWR SIG CLIP PROT AC POWER Any MXa Series amplifier can be wired for 100, 120, or 220­240 VAC, 50 or 60 Hz operation. Unless it is specially ordered, each amplifier is configured for the line voltage in the market for which it is intended. For example, those intended for Japan are 100 VAC; for North and Central America, 120 VAC; for Europe and most of Asia, 220­240 VAC. For 120-volt operation, the plug is a standard 15-ampere grounded NEMA fitting; it meets safety agency requirements for current consumption of less than 12 amperes during "normal" operation, but peak current draw under heavy usage can be much higher. OCCASIONAL CLIPPING PWR SIG CLIP PROT The "PWR" LED is lit, and the "SIG" LED is lit or flashing. This is normal. The "PWR" and "SIG" LEDs are lit, and the "CLIP" LED flashes on occasional peaks. This is normal. STEADY CLIPPING PWR SIG CLIP PROT The "PWR", "SIG", and "CLIP" LEDs are lit continuously. The channel is in hard clipping, and you should reduce power immediately to avoid speaker damage. THERMAL MUTING PWR SIG CLIP PROT The "SIG" LED is flashing, and the "PROT" LED is lit; this indicates that the protection circuitry is muting the output. The condition will reset itself when conditions allow. KEY Not Illuminated Flashing Full Brightness Figure 5: LED displays further explained. 6 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). MX 1000a, MX 1500a, MX 2000a: Complementary linear stage with 2-step high-efficiency circuit MX 3000a: Complementary linear stage 3-step high-efficiency circuit 100, 120, 220-240 VAC, 50/60 Hz AMPLIFIER PROTECTION LOAD PROTECTION OUTPUT CIRCUIT TYPE POWER REQUIREMENTS POWER CONSUMPTION Normal operation: 1/8 power @ 4 per channel Maximum: full power @ 2 per channel Divide current by 2 for 220-240 VAC operation Normal Operation @ 120 VAC Maximum @ 120 VAC 4A 22A 5. 5A 29A 7. 5A 38A <12A 58A DIMENSIONS Faceplate Width Chassis Depth Faceplate Height (2 rack spaces) Faceplate Height (3 rack spaces) WEIGHT Shipping, Lbs Net, Lbs Standard 19" (48. 3 cm) Rack Mounting 17. 9" (45. 5 cm) deep (to support rear ears) 3. 5" (8. 9 cm) 3. 5" (8. 9 cm) 5. 25" (13. 3 cm) 5. 25" (13. 3 cm) 49 lbs/22. 2 kg 42 lbs/19 kg 49 lbs/22. 2 kg 42 lbs/19 kg 62 lbs/28 kg 54 lbs/24. 5 kg 74 lbs/33. 8 kg 69 lbs/31 kg OPEN INPUT ARCHITECTURETM LEVEL I On the rear of an MXa or EX amplifier are an upper and a lower input panel; both are easily removable for future upgrades. This is the concept of Open Input Architecture, and the opening in which the panels mount is called the "slot". As installed at the factory, the lower is the MXa or EX standard input panel and the upper one is a blank. A ribbon cable connects the "slot" panels to the rest of the amplifier. It carries input signals, speaker output monitor signals, muting status, and clip activity; these are for supporting future accessories and remote control systems. Although the physical dimensions of the MXa and EX panels are the same, their internal cabling is different and the MXa platform does not support all the EX functions. The MXa Open Input Architecture slot thus is designated as "Level I" and the EX as "Level II. " The standard input panel shipped with each MXa Series amplifier has balanced 1/4" (6. 3 mm) RTS phone jacks and barrier strip inputs and the Parallel-Stereo-Bridge switch. The panel's circuit board has solder footprints for passive roll-off circuit components, input isolation transformers, and other special customizations. 9 The MX-1 Input Expander panel may be installed in the upper panel position. Other accessories include a stereo precision attenuator (for the lower panel position) and a cinema crossover (for the upper panel position). More are in development. PARALLEL, STEREO, OR BRIDGED OPERATION The Parallel-Stereo-Bridge switch is located on the input panel, next to the input jack for channel 1). The most commonly used operating mode for a power amplifier is "Stereo, " in which the two channels are independent and separate all the way from input to output. [. . . ] On the MX 3000a, the thermal management circuitry controls the variable-speed fan according to how much cooling air flow is required. At and above 80° C, the thermal limiting circuit reduces the audio signal by up to 15 dB. At 85° C, the channel mutes to go into thermal protection. VIII. TECHNICAL ASSISTANCE & SERVICE Servicing your unit requires a trained technician capable of performing the type of service you need. [. . . ]

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