HarmanKardon-MA361-pwr-sm维修电路原理图.pdf

AUDIOACCESS MA-361/MA-361CP TWELVE CHANNEL DIGITAL AMPLIFIER PRELIMINARY SERVICE MANUAL Harman Consumer Group 250 Crossways Park Dr. Woodbury, New York 11797 RadioFans.CN 收音机爱 好者资料库MA-361AudioaccessTwelve Channel DigitalAThe Audioaccess MA-361 Twelve ChannelDigital Amplifierdesigned, engineeredand manufactured by Madrigal inMiddletown, CTwill no doubt be recog-nized as the finest amplifier available foruse in any dedicated multi-room systemapplication. The product of over two yearsof development and research, the goals ofthe MA-361 were clear: high power, lowdistortion, quiet, cool operation, outstand-ing sonics and ease of installation not onlywith associated Audioaccess components,but also with other home and commercialaudio distribution systems. The trendtowards use of higher quality and largerspeaker systems for custom installed appli-cations has created a need for poweramplification offering both true higherpower levels with low distortion. The MA-361 is a category leading product thatfinally addresses the evolution of highquality custom audio systems.Main FeaturesSome of the main features of the MA-361include a conservative power rating of100 Watts per channel into 8 Ohms from20Hz-20kHz with all channels driven, 7-band graphic equalization programma-ble on a per-zone basis, signal sensing,and voltage triggers to activate main power in each stereo zone of amplifica-tion. In normal use, the MA-361 runs amazingly cool, thanks to its highly efficientdigital design. A modular layout permitsthe installing dealer to easily replace indi-vidual amplifier modules, should serviceever be required. The MA-361 can beconfigured for use in either mono orstereo operation by means of dip-switch-es on the rear panel of the amplifier. Asimple bussing scheme allows audiosignals to be routed to a single zone,selected zones, or all areas. To aid in boththe pre-wiring phase of the project and infinal installation, a speaker terminationboardavailable separatelyallows thedealer to complete the speaker wiring tothe termination board during the prelimi-nary phase of the project. Later, upon finalinstallation, the termination board is thenplugged directly into a slot on the back ofthe amplifier, minimizing the chances ofwiring errors within the system.7-Band Graphic Equalization The MA-361s 7-band graphic equalizationcapabilities allows the installing dealer tocustom tailor the sound in each zone tocompensate for the different room acousticsthroughout a residence, maximizing theperformance of each pair of speakers.Signal Sensing and Voltage Triggers The signal sensing capabilities of the MA-361 ensure that the amplifiers for agiven zone are only powered on when aparticular area is active, saving on energyconsumption. Voltage triggers allow theMA-361 to automatically turn on accessoryitems such as a fan, or a separate devicewhen either the amplifier or a designatedzone is activated.Simply IngeniousRadioFans.CN 收音机爱 好者资料库A Harman International CompanyAudioaccessMadrigal Audio Laboratories, Inc.P.O.Box 781Middletown, CT 06457-0781Internet: Fax: 860.346.15402002 Madrigal Audio Laboratories, Inc.20201AA SS/MA-361Volume/Tone Control ModulesOptional Volume/Tone Control Modules,which plug into available slots inside theamplifier, provide the dealer with theability to supply high power at very lowdistortion levels to expansion roomswithin the multi-room system. A total of6 Volume/Tone Control Modules may beinstalled in the MA-361.Flexible Installation CapabilitiesThe MA-361 is designed for use not onlywith Audioaccess systems, but also withother Multi-room or RS-232 based systems.The unit is programmed with the propri-etary Installation Manager applicationwhen it is used with other AudioaccessMulti-Room components. Configurationsettings are downloaded from a WindowsPC or laptop via the RS-485 communica-tion port on the MA-361. When used withother RS-232 based systems, a separateapplication is available, which downloadsamplifier configuration settings via the RS-232 port on the MA-361CP version.SummaryThe combination of the MA-361s powercapabilities, sonic quality, features, program-ming ease, installation flexibility andserviceability clearly sets the new standardfor amplifiers within the multi-room category.FeaturesSpecificationsNumber of Channels:L 12, configured as 6 left/right mono orstereo pairs (zones)Power Output:L 100 Watts 8 , from 20Hz 20kHz, all channels driven130 Watts 4 , from 20Hz 20kHz, all channels driven200 Watts 4 , from 20Hz 20kHz, single channels drivenEfficiency:L 93% 100 Watts/8THD & Noise:L 0.3%, 0.1 Watt 200 Watts, 4IMD:L 0.26% 4, 200 WattsFrequency response:L 0.3 dB at rated power, 8 loadBandwidth:L 60kHz at rated power, 8 loadSignal/Noise:L 97dB unweighted (ref: rated power) into 8 Crosstalk:L -84 dB between any two channels (no audible crosstalk)Protection:L Short Circuit, Over Current, DC, Thermaland UndervoltageMuting:L Turn-on, Turn-off, Signal Sensing andTriggered per zoneInput Impedance:L 20K Input Sensitivity:L 1.3 Volt for full output 4 or 8Gain:L 27dBDimensions:L 1714W x 518H x 1758D(438 mm x 130 mm x 448 mm)(with connectors & feet)Weight:L 110 Volt Amplifier:48 lb (21.8 kg)230 Volt Amplifier:51 lb (23.2 kg)Features, specifications and dimensions are subject to change.L 6 built-in 7-Band Graphic EQ, one per zoneL Signal sensingL Voltage trigger for each zone set with remov-able screw terminalL Available in two versions: MA-361 with RS-485port and MA-361CP with RS-232 portL Optional modules configured by AudioaccessInstallation Manager application or stand-alonePC programL Dual-color LED status indicator on front panelilluminates Green for normal operation, Red forstandby and a flashing Red for DC and/or ther-mal protectionL AC mains switch on front panelEasy installationL Simple built-in input bussing scheme, no con-figuration switches requiredL Plug-in TI-501 Speaker Termination Board, asnap for advance installations (available sepa-rately, not included with amplifier)Modular constructionL Amplifier modules may be replaced quicklyand easilyL Permits installation of optional modulesUpgradeableL Firmware upgradeableL Optional EM-401 Volume/Tone Control mod-ule for all six zones (available separately)L Download project settings via serial port usingInstallation Manager application or dedicatedstand-alone softwareRobust designL Low voltage standby (brown out protection)L Short circuit protectionL Thermal cutoff protectionL Soft clippingL Quiet, convection cooling (when properlyinstalled according to factory recommenda-tions)L UL/CSA/CE approvedFEATURES The Audioaccess MA-361 Twelve Channel Digital Amplifier designed, engineered and manufactured by Madrigal in Middletown, CT represents the product of over two years of research and development. As the inventor of the 12 channel amplifier category, Audioaccess has reinvented this category with the introduction of the MA-361. The goals for the MA-361 were clear: high power, low distortion, quiet, cool operation, outstanding sonics and ease of installation, when used not only in Audioaccess systems, but also with other home and commercial audio distribution systems. The trend towards higher quality and larger speakers for custom installed applications has created a need for this amp. We believe you will agree that the MA-361 is the first in an entirely new class of twelve channel amplifiers. Unique features The main features of the MA-361 include a conservative power rating of 100 Watts per channel into 8 Ohms from 20Hz-20kHz with all channels driven at 93% efficiency. This amazing efficiency not only minimizes power consumption, it also runs surprisingly cool. Other unique features include programmable 7-band graphic EQ (set by the installer via PC) for each zone and optional plug-in stereo Volume/Tone Control Modules, which pro-vide volume control in Expansion rooms/sub zones within an Audioaccess system or another RS-232 based control system. The modular layout permits the dealer to easily replace individual amplifier modules should service ever be required. An external speaker termination board can be ordered in advance to allow termination of loudspeakers before the amplifier is delivered for final installation. At final, simply plug the speaker termination board onto the rear panel of the amplifier. Other features To make the amplifier specifically attractive for use in whole-house audio distribution, we have included specific features to ensure reliable and easy installation. Signal sensing and voltage triggers activate the main power in each stereo zone of amplification. Dip switches on the rear-panel configure the MA-361 for use in either mono or stereo operation. A simple bussing scheme allows audio signals to be routed into a single zone, selected zones, or all areas. 7-Band Graphic Equalization The MA-361s 7-band graphic equalization capabilities allows the installing dealer to custom tailor the sound in each zone to compensate for the different room acoustics throughout a residence, maximizing the performance of each pair of speakers. This is accomplished by using the Audioaccess Installation Manager Software application (or stand-alone application) running on the dealers PC or laptop. Signal Sensing and Voltage Triggers The signal sensing capabilities of the MA-361 ensure that the amplifiers for a given zone are only powered on when a particular area is active, saving on energy consumption. Voltage triggers allow the MA-361 to automatically turn on accessory items such as a fan, or a separate device when either the amplifier or a designated zone is activated. Volume/Tone Control Modules Optional Volume/Tone Control Modules, which plug into available slots inside the amplifier, provide the ability to supply high power at very low distortion levels to expansion rooms within the multi-room system. The user may control the volume in rooms with Audioaccess keypads and touchscreens, or by using ANY other touch screen/control systems. A total of 6 Volume/Tone Control Modules may be installed in the MA-361. Flexible Installation Capabilities The MA-361 is designed for use with Audioaccess systems, as well as other Multi-room or RS-232 based systems. The unit is programmed with the proprietary Installation Manager application when it is used with other Audioaccess Multi-Room components. Configuration settings are downloaded from a Windows PC or laptop via the RS-485 communication port on the MA-361. When used with other RS-232 based systems, a separate application is available, which downloads amplifier configuration settings via the RS-232 port on the MA-361CP version. Summary The MA-361s combination of power capabilities, sonic quality, features, programming ease, installation flexibility and serviceability clearly sets the new standard for amplifiers within the multi-room category. Specifications: Number of Channels: 12, configured as 6 left/right mono or stereo pairs (zones) Power Output: 100 Watts 8 ohms, from 20Hz 20kHz, all channels driven 130 Watts 4 ohms, from 20Hz 20kHz, all channels driven 200 Watts 4 ohms, from 20Hz 20kHz, two channels driven Efficiency: 93% 100 Watts/8 ohms THD & Noise: 0.3%, 0.1 Watt 200 Watts, 4 ohms IMD:-0.26% 4 ohms 200 Watts Frequency response: 0.3 dB at rated power, 812 load Bandwidth: 60kHz at rated power, 812 load Signal/Noise: 97dB unweighted (ref: rated power) into 8 12 Crosstalk: -84 dB between any two channels (no audible crosstalk) Protection:Short Circuit, Over Current, DC, Thermal and Undervoltage Muting: Turn-on, Turn-off, Signal Sensing and Triggered per zone Input Impedance: 20K Input Sensitivity: 1.3 Volt for full output 4 or 812 Gain: 27dB Dimensions: 17 1/4W x 5 1/8H x 17 5/8D (438 mm x 130 mm x 448 mm) (with connectors & feet) Weight:110 Volt Amplifier: 48 lb (21.8 kg), 230 Volt Amplifier: 51 lb (23.2 kg) Features, specifications and dimensions are subject to change. Madrigal Audio Laboratories P.O. Box 781 Middletown, CT 06457-0781 (860) 346-0896 FAX (860) 347-6251 # A041102 MA-361 AUDIO BOARD REMOVAL AND ASSEMBLY INSTRUCTIONS Audioaccess AUDIO BOARD DISASSEMBLY INSTRUCTIONS APRIL 15, 2002 A041102 MA-361 Disassembly Instructions Page 2 Table of Contents Overview.3 Affected Units .3 Cautions before Beginnning .3 Tools Required.3 Disassembly/Reassembly Steps.4 Removal/Assembly Sheets.A Process Description Sheets Step 1 Remove Top Cover. A000010P265 Step 2 Remove Larger PCP Clamp Assembly . A000010P245 Step 3 Remove First Graphic EQ PCB. A000010P210 Step 4 Remove Second Graphic EQ PCB . A000010P205 Step 5 Remove Screws Holding RS-232/485 PCB . A000010P200 Step 6 Remove RS-232 PCB (CP Model Specific). A000010P190 Step 7 Remove RS-485 PCB (Standard MA 361 Specific). A000010P185 Step 8 Remove Amp Module Clamp Assembly. A000010P180 Step 9 Remove Outer Ribbon to Audio Output PCB . A000010P170 Step 10 Remove Inner Ribbon to Audio Output PCB. A000010P165 Step 11 Remove Screws on Audio Output PCB .A000010P160A Step 12 Remove Audio Output PCB . A000010P155 Step 13 Remove Audio Modules. A000010P150 Step 14 Remove Audio Module Signal Cables . A000010P135 Step 15 Remove Audio Module Power Cables . A000010P130 Step 16 Remove Volume Bypass Jumpers. A000010P125 Step 17 Remove 20 Pin Ribbon Cable.A000010P120A Step 18 Remove 40 Pin Ribbon Cable.A000010P115A Step 19 Disconnect Connector on Audio Board P1. A000010P110 Step 20 Disconnect Cable on Audio Board to RCA Input Board. A000010P105 Step 21 Remove Screws on Audio Board1 . A000010P095 Step 22 Remove Back Panel Screws. A000010P092 Audioaccess AUDIO BOARD DISASSEMBLY INSTRUCTIONS APRIL 15, 2002 A041102 MA-361 Disassembly Instructions Page 3 Overview The following procedure will allow a qualified Audioaccess Distributor to successfully remove and reinstall the MA-361 Audio Board. New replacement audio boards shipped April 2002 eliminate a problem where keypad messages may be heard as pops in Zones 1, 2 , 3 and 4 in affected units. In addition, the signal sensing sensitivity was lowered to avoid audio from shutting off during low passages of music if the amplifier is configured to turn on with Signal Sensing. Affected Units MA-361s manufactured before the serial numbers listed below should receive an updated Audio Board. Starting Serial Numbers Updated Audio Boards Domestic Units 361u1073 Export Units 361e1018 Cautions! Before Beginning CAUTION! Hazardous voltages available inside unit. Before proceeding, remove AC cable from AC outlet. CAUTION! Static sensitive parts and subassemblies inside unit. A static protection wrist strap must be worn when touching static sensitive components. Please follow wrist strap manufacturers instructions for proper use. Tools Required o #2 Phillips Screwdriver o 3/32” Hex Driver o Needle Nose Pliers Audioaccess AUDIO BOARD DISASSEMBLY INSTRUCTIONS APRIL 15, 2002 A041102 MA-361 Disassembly Instructions Page 4 Disassembly/Reassembly Steps The Disassembly steps are depicted in the process sheets and are identified below in Steps 1 through 22. Instru