Harman-Kardon-MA-361-Service-Manual 电路图 维修手册.pdf
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1、 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-361 Audioaccess Twelve Channel Digital Amplifier The Audioaccess MA-361 Twelve Channel Digital Amplifierdesigned,
2、engineered and manufactured by Madrigal in Middletown, CTwill no doubt be recog- nized as the finest amplifier available for use in any dedicated multi-room system application. The product of over two years of development and research, the goals of the MA-361 were clear: high power, low distortion,
3、quiet, cool operation, outstand- ing sonics and ease of installation not only with associated Audioaccess components, but also with other home and commercial audio distribution systems. The trend towards use of higher quality and larger speaker systems for custom installed appli- cations has created
4、 a need for power amplification offering both true higher power levels with low distortion. The MA-361 is a category leading product that finally addresses the evolution of high quality custom audio systems. Main Features Some of the main features of the MA-361 include a conservative power rating of
5、 100 Watts per channel into 8 Ohms from 20Hz-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 it
6、s highly efficient digital design. A modular layout permits the installing dealer to easily replace indi- vidual amplifier modules, should service ever be required. The MA-361 can be configured for use in either mono or stereo operation by means of dip-switch- es on the rear panel of the amplifier.
7、A simple bussing scheme allows audio signals to be routed to a single zone, selected zones, or all areas. To aid in both the pre-wiring phase of the project and in final installation, a speaker termination boardavailable separatelyallows the dealer to complete the speaker wiring to the termination b
8、oard during the prelimi- nary phase of the project. Later, upon final installation, the termination board is then plugged directly into a slot on the back of the amplifier, minimizing the chances of wiring errors within the system. 7-Band Graphic Equalization The MA-361s 7-band graphic equalization
9、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. Signal Sensing and Voltage Triggers The signal sensing capabilities of the MA-361 ensure that
10、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. Simply Ingen
11、ious RadioFans.CN 收音机爱 好者资料库 A Harman International Company Audioaccess Madrigal Audio Laboratories, Inc. P.O.Box 781 Middletown, CT 06457-0781 Internet: Fax: 860.346.15402002 Madrigal Audio Laboratories, Inc. 20201AA SS/MA-361 Volume/Tone Control Modules Optional Volume/Tone Control Modules, which
12、plug into available slots inside the amplifier, provide the dealer with the ability to supply high power at very low distortion levels to expansion rooms within the multi-room system. A total of 6 Volume/Tone Control Modules may be installed in the MA-361. Flexible Installation Capabilities The MA-3
13、61 is designed for use not only with Audioaccess systems, but also with other Multi-room or RS-232 based systems. The unit is programmed with the propri- etary Installation Manager application when it is used with other Audioaccess Multi-Room components. Configuration settings are downloaded from a
14、Windows PC or laptop via the RS-485 communica- tion 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 combination of the MA-361s power capabilit
15、ies, sonic quality, features, program- ming ease, installation flexibility and serviceability clearly sets the new standard for amplifiers within the multi-room category. Features Specifications Number of Channels: L 12, configured as 6 left/right mono or stereo pairs (zones) Power Output: L 100 Wat
16、ts 8 , from 20Hz 20kHz, all channels driven 130 Watts 4 , from 20Hz 20kHz, all channels driven 200 Watts 4 , from 20Hz 20kHz, single channels driven Efficiency: L 93% 100 Watts/8 THD the byte-wide (x8) data appears on DQ7-DQ0. This device is designed to be programmed in-system using only a single 3.
17、0 volt VCC supply. No VPP is required for write or erase operations. The device can also be programmed in standard EPROM programmers. This device is manufactured using AMDs 0.32 m process technology, and offers all the features and ben- efits of the Am29LV200, which was manufactured using 0.5 m proc
18、ess technology. In addition, the Am29LV200B features unlock bypass programming and in-system sector protection/unprotection. The standard device offers access times of 55, 70, 90 and 120 ns, allowing high speed microprocessors to operate without wait states. To eliminate bus contention the device ha
19、s separate chip enable (CE#), write enable (WE#) and output enable (OE#) controls. The device requires only a single 3.0 volt power supply for both read and write functions. Internally generated and regulated voltages are provided for the program and erase operations. The device is entirely command
20、set compatible with the JEDEC single-power-supply Flash standard. Com- mands are written to the command register using standard microprocessor write timings. Register con- tents serve as input to an internal state-machine that controls the erase and programming circuitry. Write cycles also internall
21、y latch addresses and data needed for the programming and erase operations. Reading data out of the device is similar to reading from other Flash or EPROM devices. Device programming occurs by executing the program command sequence. This initiates the Embedded Program algorithman internal algorithm
22、that auto- matically times the program pulse widths and verifies proper cell margin. The Unlock Bypass mode facili- tates faster programming times by requiring only two write cycles to program data instead of four. Device erasure occurs by executing the erase command sequence. This initiates the Emb
23、edded Erase algorithman internal algorithm that automatically preprograms the array (if it is not already programmed) before executing the erase operation. During erase, the device automatically times the erase pulse widths and verifies proper cell margin. The host system can detect whether a progra
24、m or erase operation is complete by observing the RY/BY# pin, or by reading the DQ7 (Data# Polling) and DQ6 (toggle) status bits. After a program or erase cycle has been completed, the device is ready to read array data or accept another command. The sector erase architecture allows memory sectors t
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