Mackie-ART300A-as-sm维修电路原理图.pdf

ART300A Active Loudspeaker Service Manual 2002 MACKIE DESIGNS, INC. RadioFans.CN 收音机爱 好者资料库 2 ART300A Service Manual SERVICE ON THIS EQUIPMENT IS TO BE PERFORMED BY EXPERIENCED REPAIR TECHNICIANS ONLY RadioFans.CN 收音机爱 好者资料库 3 ART300A Service Manual CONTENTS Safety Instructions.2 Introduction.4 Active Speaker Safety Test.5 Overview.7 Rear Panel .8 Specifi cations.9 Parts .10 Final Assembly.10 Amplifer Assembly.11 Amplifi er PCB Assembly.12 Input Board Assembly and PCB.14 RCF Parts Differences.15 Main Circuit Board.16 Schematics Crossover .16 High Frequency Amplifi er.17 Low Frequency Amplifi er.18 Power Supply.19 PCB Layout.20 Input Board.21 Schematic.21 PCB Layout.22 RadioFans.CN 收音机爱 好者资料库 4 ART300A Service Manual Introduction About this Manual This manual contains the basic repair information for the ART series loudspeakers. For each model, the following information is supplied: Safety information Overview Rear panel view and features Specifi cations and test details Parts list, containing a master parts list and sub-assembly parts Parts list differences between RCF and Mackie Industrial ART speakers Schematics PCB layout drawing It is essential that you have a copy of the users manual as this contains the complete operating instructions. Service Technical Assistance Mackie Designs, Service Technical Assistance, is available 8AM - 5PM PST, Monday through Friday for Authorized Mackie Service Centers, at 1-800-258-6883. Feel free to call with any questions and speak with a carefully-calibrated technician. If one is not available, leave a detailed message and a qualifi ed Mackoid will return your call asap. Disclaimer The information contained in this manual is proprietary to Mackie Designs, Inc. The entire manual is protected under copyright and may not be reproduced by any means without express written permission from Mackie Designs, Inc. SERVICE ON THIS EQUIPMENT IS TO BE PERFORMED BY EXPERIENCED REPAIR TECHNICIANS ONLY 16220 Wood-Red Road NE, Woodinville, WA 98072 USA TEL 888.337.7404, FAX 425.487.4337, UK +44.1268.571.212, FAX +44.1268.570.809 +industrialrcf- ITALY +39.0522.354.111, FAX +39.0522.926.208 +industrialrcf.it FRANCE +33.3.8546.9160, FAX +33.3.8546.9161 +mercialwanadoo.fr GERMANY +49.2572.96042.0, FAX +49.2572.96042.10 +industrialmackie.de RadioFans.CN 收音机爱 好者资料库 5 ART300A Service Manual You must perform the following leakage test before returning any active speakers to your customer. Take every safety precaution to protect yourself while doing this test. 1. Make a small loading RC circuit as shown in the diagram below, and connect the AC volt meter between the AC power source ground and any exposed metal on the unit under test. 2. Connect the unit under test to an AC power source using a ground-lift adaptor, leaving the units safety ground fl oating. Turn the unit on. 3. The meter reading should be less than 750mVAC (note: this is equivalent to 0.5mA of leakage current). 4. Flip the plug over in the receptical so the hot and neutral are swapped. Verify that the reading is still less then 750mVAC. 5. If either reading is greater than 750mVAC, then you must investigate and repair the speaker before returning it to your customer. Active speaker safety test RadioFans.CN 收音机爱 好者资料库 6 ART300A Service Manual Safety First! Before connecting and using the equipment, please read the Quick-Start Guide carefully and keep it for future reference. Warning This equipment has been designed to be installed by qualifi ed professionals only! There are many factors to be considered when installing professional sound reinforcement systems, including mechanical and electrical considerations, as well as acoustic coverage and performance. Mackie Industrial strongly recommends that this equipment be installed only by a professional sound installer or contractor. 1. Never install, connect, or disconnect the unit with the power supply on. 2. Before powering up the speaker, make sure the voltage select switch corresponds to the AC Voltage supply. 3. Make sure the safety ground on the power cord is properly grounded. 4. To prevent the risk of electric shock, never open the unit. There are no user serviceable parts inside. 5. To ensure normal cooling of the amplifi er, make sure the unit is well ventilated. Avoid exposure to direct sunlight or proximity to any heat source, dust, or dampness. Installation A 1-3/8 (35mm) socket is provided in the bottom of the cabinet for mounting the loudspeaker on a speaker stand. The speaker can be suspended with approved rigging hardware. Always use at least two M10 threaded inserts located on opposite sides of the enclosure. The speaker must be positioned so that the weight of the enclosure is equally distributed over the two inserts. Warning Never attempt to suspend the ART Series loudspeakers by their handles. Consult a professional rigger or structural engineer prior to suspending loudspeakers from a structure not intended for that use. Always know the working load limit of the structure supporting the loudspeaker array. Always make sure that the rigging hardware minimum rating is at least fi ve times the actual load. RadioFans.CN 收音机爱 好者资料库 7 ART300A Service Manual Overview The ART300A is a full-range two-way professional active speaker system that combines high power and wide bandwidth in a light-weight enclosure for fi xed-installation systems. The 12 low-frequency transducer, in combination with a 1 compression driver coupled to an integral 90 x 70 constant directivity polynomial horn, form an extremely powerful package for any small to medium-sized sound reinforcement application. It features a balanced XLR input with a Mic/Line switch and a paralleled balanced XLR output for cascading multiple speakers. Rear panel controls also include Music and Voice equalization switches, a rotary volume control, and an input limiter. The two built-in power amplifi ers provide 300W for the LF driver and 60W for the HF driver. The enclosure is constructed of high-strength polypropylene, with M10 threaded inserts on all four sides for rigging, and an integral locking 1-3/8 socket in the bottom for mounting on a standard speaker stand. RadioFans.CN 收音机爱 好者资料库 8 ART300A Service Manual Rear Panel 1. INPUT is a balanced XLR input jack that accepts mic-level or line-level signals. 2. OUTPUT is a balanced XLR output jack in parallel with the INPUT jack, allowing the signal to “loop through” for daisy-chaining speakers together. 3. LINE/MIC switch for mic-level or line-level signals at the INPUT. 4. VOICE equalization switch ON provides a gentle boost at 3kHz and 6kHz. 5. MUSIC equalization switch ON provides a low-frequency and high-frequency boost. 6. LIMITER indicator illuminates when the limit- ing protection circuits are activated. 7. OPERATE indicator illuminates when the POWER switch is turned on. 8. VOLUME control adjusts the input-stage gain. 9. POWER switch turns the AC power on and off. 10. AC OUTLET for connecting AC power to an additional Mackie Industrial active speaker system. 11. Grounding Terminal provides an additional safety grounding point. 12. IEC AC Socket. Connect the detachable power cord to the socket. The protection fuse is also contained in the AC socket. CAUTION: Replace fuse only with the same type as indicated on the rear panel. Connections The XLR connectors use the following AES standard: Pin 1 = Ground (Shield) Pin 2 = Hot (+) Pin 3 = Cold () 1 2 4 5 3 8 10912 11 7 6 RadioFans.CN 收音机爱 好者资料库 9 ART300A Service Manual Specifi cations System: Freq. Range (10 dB): 55Hz-19kHz Freq. Response (3 dB): 75Hz-16kHz Horz. Coverage Angle (6 dB): 90, averaged 1kHz-10kHz Vert. Coverage Angle (6 dB): 70, averaged 1kHz-10kHz Directivity Factor Q (DI): 10.0 (10.0), averaged 1kHz-10kHz System Sensitivity1: 101 dB, 1W1m Rated Maximum SPL2: 126 dB 1 m (3.3ft) peak HF Protection: Dynamic Transducers: Low Frequency: 12 (300 mm) diameter woofer High Frequency: 1 (25 mm) compression driver, horn loaded Preamp and Processor: Input Sensitivity: Mic In: 8mV Line In: 125mV Input Impedance: Mic In: 650 unbalanced 1.3k balanced Line In: 10k unbalanced 19k balanced Crossover Frequency and Slope: 1.8kHz; 24 dB/octave Time Alignment: Analog, 0.3 ms HF delay Speaker Protection: Thermal, over-excursion Music Equalization: +4.3 dB 65Hz +4.0 dB 12kHz Voice Equalization: +4.0 dB 3kHz +4.0 dB 6kHz Indicators: Power ON, Limiter Amplifi ers: LF Amplifi er Power: 300 watts RMS HF Amplifi er Power: 60 watts RMS Distortion: < 0.1% THD at rated power Amp Protection: Thermal, limiter, short circuit Power Supply: 115/230 VAC, 2A, 50/60 Hz Physical: Enclosure: Asymmetrical trapezoidal, reinforced polypropylene Mounting: Lockable 1-3/8 (35mm) stand mount Rigging Inserts: 4 points, accepts M10 threaded hardware Input/Output Connectors: 2 XLR balanced Dimensions HxWxD: 24.4 x 15.4 x 12.3 (620 mm x 390 mm x 312 mm) Net Weight: 44.0 lb (20.0 kg) Testing: DC voltages: + 83 VDC - 83 VDC + 41 VDC - 41 VDC + 15 VDC - 15 VDC DC offset: less than +/- 0.1 VDC Bias: At idle, into 8 ohm loads after warm-up adjust R36 5.5 mV R39-R40 (low freq amplifi er) adjust R73 13 mV R81-R82 (high freq amplifi er) AC current draw: Less than 0.3 A at idle RadioFans.CN 收音机爱 好者资料库 10 ART300A Service Manual ART300A Parts 13112024 ART300A Final Assembly PART # DESCRIPTION QUANTITY NOTES 21111060 WOOFER L12.1 23103350 INPUT ASSEMBLY.1 See page 14 23103360 AMPLIFIER ASSEMBLY.1 See next page 23103450 ACCESSORY (FLOOR WEDGE ANTI-TIP-OVER THINGY) .1 23103620 WIRE ASSEMBLY.1 25110480 TWEETER N 350.1 33090090 CABINET FRONT 33526.1 33090400 CABINET REAR 34288 .1 33160530 WOOFER GASKET 21202.1 33221060 WOOFER GRILL 31809.1 33221130 CONTROL BOARD SHIELD 32656 .1 33890100 FEET 34287.4 33901250 HANDLE 31154.1 33901270 WIRE CABLE GROMMET 32498.1 33912130 ANTIVIBRATION 22867.4 33912160 TRANSFORMER SPACERS 23128.6 33921210 NUTS FOR MOUNTING INSERTS 22839.4 33921480 MOUNTING INSERTS 31832 .4 33921510 GRILL SPACERS 32515.4 33921540 TWEETER MOUNTING PLATES 32655.2 33921580 SPACERS 33359 .8 33950280 MOUNTING INSERT COVER STICKERS (HEX) 23495.4 33951920 TRADEMARK BADGE 34672.1 33960580 WARRANTY MOD.1712 .1 33961560 INSTRUCTION GUIDE MOD.1743 .1 33993020 SHIPPING BOX 34673.1 33994990 BOX PACKING 31914.2 33995000 BOX PACKING 31915.2 33995350 SHIPPING PALLET 33301 .0.0833 33995360 BOX COVER 33303.0.1666 33995370 ANGLE 1800 33302.0.3333 33995380 BOX PACKING 33368.2 43040390 SOUND ABSORBER FOAM SP.15 DENS.50 .24 43900110 STOPPER PLUG.1 43900580 U-SHAPED RUBBER GASKET ESPACE200.0.001 43900810 KNURLED KNOB 32243 .