Audioaccess MA-361 Service Manuel utilisateur

AUDIOACCESS

MA-361/MA-361CP

TWELVE CHANNEL DIGITAL AMPLIFIER

PRELIMINARY SERVICE MANUAL

Harman Consumer Group

250 Crossways Park Dr.

Woodbury, New York 11797

MA-361

Audioaccess®Twelve Channel Digital

Amplifier

www.audioaccess.com

The Audioaccess MA-361 Twelve Channel

Digital Amplifier—designed, engineered

and manufactured by Madrigal in

Middletown, CT—will 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, 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 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

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 its 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. 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

board—available separately—allows the

dealer to complete the speaker wiring to

the termination board 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-361’s 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.

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.

Simply Ingenious

A Harman International Company

Audioaccess®

Madrigal Audio Laboratories, Inc.

P.O.Box 781

Middletown, CT 06457-0781

Internet: www.madrigal.com

20201AA – SS/MA-361

Volume/Tone Control Modules

Optional Volume/Tone Control Modules,

which 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-361 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 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-361’s power

capabilities, 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:

▲12, configured as 6 left/right mono or

stereo pairs (zones)

Power Output:

▲100 Watts @ 8 Ω, from 20Hz – 20kHz,

all channels driven

130 Watts @ 4 Ω, from 20Hz – 20kHz,

all channels driven

200 Watts @ 4 Ω, from 20Hz – 20kHz,

single channels driven

Efficiency:

▲93% @ 100 Watts/8Ω

THD & Noise:

▲< 0.3%, 0.1 Watt – 200 Watts, 4Ω

IMD:

▲0.26% @ 4Ω, 200 Watts

Frequency response:

▲± 0.3 dB at rated power, 8Ωload

Bandwidth:

▲60kHz at rated power, 8Ωload

Signal/Noise:

▲97dB unweighted (ref: rated power) into 8 Ω

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 Ω

Input Sensitivity:

▲1.3 Volt for full output 4 or 8Ω

Gain:

▲27dB

Dimensions:

▲171⁄4"W x 51⁄8"H x 175⁄8"D

(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.

▲6 built-in 7-Band Graphic EQ, one per zone

▲Signal sensing

▲Voltage trigger for each zone set with remov-

able screw terminal

▲Available in two versions: MA-361 with RS-485

port and MA-361CP with RS-232 port

▲Optional modules configured by Audioaccess

Installation Manager application or stand-alone

PC program

▲Dual-color LED status indicator on front panel

illuminates Green for normal operation, Red for

standby and a flashing Red for DC and/or ther-

mal protection

▲AC mains switch on front panel

Easy installation

▲Simple built-in input bussing scheme, no con-

figuration switches required

▲Plug-in TI-501 Speaker Termination Board, a

snap for advance installations (available sepa-

rately, not included with amplifier)

Modular construction

▲Amplifier modules may be replaced quickly

and easily

▲Permits installation of optional modules

Upgradeable

▲Firmware upgradeable

▲Optional EM-401 Volume/Tone Control mod-

ule for all six zones (available separately)

▲Download project settings via serial port using

Installation Manager application or dedicated

stand-alone software

Robust design

▲Low voltage standby (brown out protection)

▲Short circuit protection

▲Thermal cutoff protection

▲Soft clipping

▲Quiet, convection cooling (when properly

installed according to factory recommenda-

tions)

▲UL/CSA/CE approved

FEATURES

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-361’s 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 dealer’s 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-361’s 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, 81Ú2 load

• Bandwidth: 60kHz at rated power, 81Ú2 load

• Signal/Noise: 97dB unweighted (ref: rated power) into 8 1Ú2

• 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 81Ú2

• Gain: 27dB

• Dimensions: 17 1/4"W x 5 1/8"H x 17 5/8"D (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-361AUDIOBOARDREMOVALANDASSEMBLYINSTRUCTIONS

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 14Remove Audio Module Signal Cables ............................................................................ A000010P135

Step 15Remove 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 eliminatea

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-361’s 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

o3/32” Hex Driver

oNeedle 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 Steps1 through 22.

Instructions on each step are included in the process sheet for each step. In addition, some notes are provided below

to clarify a step for either Assembly or Reassembly.

Once the Audio Board has been extracted, repeat each step below in a backwards order from Step 22 through Step 1

when installing the replacement Audio Board.

Step Number Description Process Sheet Number

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

This step is used for MA-361CP units only.

Step 7 Remove RS-485 PCB (Standard MA 361 Specific).............................................A000010P185

This step is used for the standard MA-361.

Step 8 Remove Amp Module Clamp Assembly............................................................A000010P180

Note the “Dimples” or “Notches” on each end of the amp Clamp Assembly. When re-

installing this clamp, assure that these “dimples” are reinstalled in the same direction as

when removed.

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

When reassembling, these screws must be tight for grounding purposes before AC

power is applied.

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

These Jumpers are present whenever the Volume Tone Modules, EM401, are not used.

Remove these jumpers and install in the replacement Audio Board.

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

Disconnect only the connector on the Audio Board PCB. Do not disconnect connector on

Power Supply or Controller PCB.

Step 20 Disconnect Cable on Audio Board to RCA Input Board.......................................A000010P105

Step 21 Remove Screws on Audio Board......................................................................A000010P095

Step 22 Remove Back Panel Screws............................................................................A000010P092

Ce manuel convient aux modèles suivants

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