crown amcron macrotech ma1200 ma1201 amplifier schematic service manual

Download Crown Amcron Macrotech Ma1200 Ma1201 Amplifier Schematic Service Manual

Post on 14-Oct-2015

852 views

Category:

Documents

189 download

Embed Size (px)

DESCRIPTION

Crown Amcron Macrotech Ma1200 Ma1201 Amplifier Schematic Service Manual

TRANSCRIPT

  • Macro-Tech 1200 Amplifier Service Manual

    1

    MACRO-TECH-1200

    POWER AMPLIFIER

    SERVICE MANUAL

    K-SVCMA122-96

    Macro-Tech, ODEP and Crown are registered trademarks of Crown International, Inc.

    Mailing Address:P.O. Box 1000

    Elkhart, IN U.S.A. 46515-1000

    Shipping Address:57620 C.R. 105

    Elkhart, IN U.S.A. 46517

    1996 by CROWN INTERNATIONAL, INC.

  • Macro-Tech 1200 Amplifier Service Manual

    2

    PRVENIR LE CHOCLECTRIQUE NENLEVEZPAS LES COUVERTURES.

    RIEN DES PARTIESUTILES LINTRIEUR.

    DBRANCHER LA BORNEAVANT DOUVRIR LA

    MODULE EN ARRIRE.

    TO PREVENT ELECTRIC SHOCK DONOT REMOVE TOP OR BOTTOM

    COVERS. NO USER SERVICEABLEPARTS INSIDE. REFER SERVICING

    TO QUALIFIED SERVICEPERSONNEL. DISCONNECT

    POWER CORD BEFORE REMOVINGREAR INPUT MODULE TO ACCESS

    GAIN SWITCH.

    CAUTION AVIS

    WARNINGTO REDUCE THE RISK OF ELECTRIC

    SHOCK, DO NOT EXPOSE THISEQUIPMENT TO RAIN OR MOISTURE!

    The information furnished in this manual does not include all of the details of design, production, or variationsof the equipment. Nor does it cover every possible situation which may arise during installation, operation ormaintenance. If you need special assistance beyond the scope of this manual, please contact the CrownTechnical Support Group.

    Mail: P.O. Box 1000 Elkhart IN 46515-1000Shipping: 57620 C.R. 105 Elkhart IN 46517

    Phone: (800) 342-6939/(219) 294-8200FAX: (219) 294-8301

  • Macro-Tech 1200 Amplifier Service Manual

    3

    Table of Contents

    Introduction ............................................................. 4Parts Information ..................................................... 5Specifications .......................................................... 6Voltage Conversion ................................................. 7Circuit Theory .......................................................... 8Electrical Checkout Procedures ............................ 13Parts List (Non-Module) ........................................ 17Module and Schematic Information ...................... 20Fuse Module Parts List .......................................... 21Q42553A8 Display Module Parts List ................... 22Q42855-9 Display Module Parts List ..................... 23Q43433-4 Display Module Parts List ..................... 24Q42647-0 Output Module Parts List ..................... 25Q42717-1 Output Module Parts List ..................... 26Q42871-6 Output Module Parts List ..................... 27Q42968-0 Output Module Parts List ..................... 28Q43202-3 Output Module Parts List ..................... 29Q42666-0 Main Module Parts List ......................... 30Q42736-1 Main Module Parts List ......................... 32Q42754-4 Main Module Parts List ......................... 35Q42776-7 Main Module Parts List ......................... 38Q42981-3 Main Module Parts List ......................... 41Q43036-5 Main Module Parts List ......................... 44Q43030-8 Main Module Parts List ......................... 47

  • Macro-Tech 1200 Amplifier Service Manual

    4

    CrownTechnical Support Group

    Factory ServiceParts Department

    Mailing Address:PO Box 1000

    Elkhart, IN USA 46515-1000

    Shipping Address:57620 C.R. 105

    Elkhart, IN USA 46517

    Phone: (219) 294-8200Toll Free: (800) 342-6939

    FAX: (219) 294-8301

    This manual contains service information on Crownpower amplifiers. It is designed to be used in conjunc-tion with the applicable Owner's Manual. However,some important information is duplicated in this Ser-vice Manual in case the Owner's Manual is not readilyavailable.

    NOTE: THE INFORMATION IN THIS MANUAL IS INTENDEDFOR USE BY AN EXPERIENCED TECHNICIAN ONLY!

    ScopeThis Service Manual in intended to apply to all versionsof the MA-1200 amplifier including the Amcron MA-1201. The Parts Listings include parts specific for theUS version and the European version (MA-1200E13).For parts specific only to other versions contact theCrown Technical Support Group for help in findingpart numbers.

    This Service Manual includes several sections. Thesesections include Parts Information, Specifications,Voltage Conversion, Circuit Theory, Electrical TestProcedures, Non-Module Parts Lists, and ModuleParts Lists. Schematics are attached. Note that com-ponent parts with circuit board comprise a completemodule. Module part numbers are always associatedwith a specific circuit board, although an unpopulated

    circuit board may be built up with different parts tocreate different modules. Note that Crown does notsell blank (unpopulated) circuit boards.

    Each of the compact audio power amplifiers aredesigned for professional or commercial use. Provid-ing high power amplification from 20Hz to 20KHz withminimum distortion, they feature balanced inputs withbridged and parallel monophonic capability. Specificfeatures vary depending on model family.

    WarrantyEach Owner's Manual contains basic policies as re-lated to the customer. In addition it should be statedthat this service documentation is meant to be usedonly by properly trained service personnel. Becausemost Crown products carry a 3 Year Full Warranty(including round trip shipping within the United States),all warranty service should be referred to the CrownFactory or Authorized Warranty Service Center. Seethe applicable Owners Manual for warranty details. Tofind the location of the nearest Authorized ServiceCenter or obtain instructions for receiving Crown Fac-tory Service please contact the Crown Technical Sup-port Group (within North America) or your Crown/Amcron Importer (outside North America).

    Introduction

  • Macro-Tech 1200 Amplifier Service Manual

    5

    Parts Information

    shipment on a C.O.D. or pre-payment (check or creditcard) basis.

    TermsNormal terms are pre-paid. Net-30 Days applies toonly those firms having pre-established accounts withCrown. If pre-paying, the order must be packed andweighed before a total bill can be established, afterwhich an amount due will be issued and shipmentmade upon receipt of pre-payment. New parts re-turned for credit are subject to a 10% re-stocking fee,and authorization from the Crown Parts Departmentmust be obtained before returning parts for credit.

    Crown is not a general parts warehouse. Parts sold bythe Crown Parts Department are solely for servicingCrown/Amcron products. Part prices and availabil-ity are subject to change without notice.

    General InformationLater sections include both mechanical and electricalparts lists for this product. The parts listed are currentas of the date printed. Crown reserves the right tomodify and improve its products for the benefit of itscustomers.

    Part Numbering SystemsAs of the printing of this manual, Crown is using twonumbering systems. The elder system always useseight characters. The first character is a letter. Com-mon letters used are C, D, H, M, P, and Q. The secondthrough sixth characters are numbers. The numbersbuild sequentially (for each prefix letter) as new partsare added to our parts inventory system. (In somecases there will be a space then a four characternumber after the prefix letter; the space is considereda character.) The seventh character is usually a hy-phen, though it may be a letter to indicate a revision orspecial note. The last character is called a check-digit,and is useful to Crown for internal tracking.

    Crown is in the process of converting to a new partnumber system. Length may vary from eight to twelvecharacters. There is still a letter prefix, then fivenumbers. These five numbers identify a type of part.The seventh character is a hyphen. Remaining char-acters identify the details of the type of part identifiedby the first part of the number.

    Standard and Special PartsMany smaller electrical and electronic parts used byCrown are stocked by and available from electronicsupply houses. However, some electronic parts thatappear to be standard are actually special. A partordered from Crown will assure an acceptable re-placement. Structural items such as modules andpanels are available from Crown only.

    Ordering PartsWhen ordering parts, be sure to give the productmodel, and include a description and part number(CPN/DPN) from the parts listing. Price quotes areavailable on request.

    ShipmentShipment will be normally made by UPS or best othermethod unless you specify otherwise. Shipments aremade to and from Elkhart, Indiana USA, only. Estab-lished accounts with Crown will receive shipmentfreight prepaid and will be billed. All others will receive

    CrownParts Department

    Mailing Address:PO Box 1000

    Elkhart, IN USA 46515-1000

    Shipping Address:57620 C.R. 105

    Elkhart, IN USA 46517

    Phone: (219) 294-8210or: (219) 294-8211

    Toll Free: (800) 342-6939FAX: (219) 294-8301

  • Macro-Tech 1200 Amplifier Service Manual

    6

    Specifications

    Unless noted otherwise, all specifications are basedon driving an 8 ohm load per channel, both channelsdriven, the sensitivity switch in the 26dB position, theAC supply is 120VAC at 60Hz. Crown specificationsare guaranteed through the warranty period (normally3 years). Because our testing methods are more strin-gent than our published specifications, every Crownamplifier will exceed its published specifications.

    POWERPower8 Ohm Stereo310W/Ch4 Ohm Stereo480W/Ch2 Ohm Stereo675W/Ch8 Ohm Bridge Mono970W4 Ohm Bridge Mono1300W2 Ohm Parallel Mono965W1 Ohm Parallel Mono1300W

    Load Impedances: Rated for 16, 8, 4, 2, and 1 (parallelmono only) Ohm operation; safe with all types of loads,even totally reactive loads.

    AC Mains: 120VAC at 60 Hz with standard three-wiregrounded connector for North American units; 100VAC,120VAC, 220VAC, and 240VAC a

View more >