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Crown Audio service manual MICRO-TECH-1200, Power Amplifier, Elkhart, IN U.S.A, K-SVCMT12

Models: 1200

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POWER AMPLIFIER

SERVICE MANUAL

MICRO-TECH®-1200

Mailing Address:	Shipping Address:
P.O. Box 1000	57620 C.R. 105
Elkhart, IN U.S.A. 46515-1000	Elkhart, IN U.S.A. 46517

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

K-SVCMT12

8-95

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Crown Audio service manual MICRO-TECH-1200, Power Amplifier, Elkhart, IN U.S.A, K-SVCMT12, Mailing Address, P.O. Box

Contents

MICRO-TECH-1200 POWER AMPLIFIERElkhart, IN U.S.A Elkhart, IN U.S.AAVIS Table of Contents Introduction WARRANTYSCOPE CrownGENERAL INFORMATION Parts InformationPART NUMBERING SYSTEMS STANDARD AND SPECIAL PARTSPOWER Power SpecificationsPERFORMANCE MECHANICALVoltage Conversion Theory FEATURESOVERVIEW FRONT END OPERATIONGROUNDED BRIDGE TOPOLOGY VOLTAGE AMPLIFICATIONTheory Last Voltage Amplifiers LVAsHigh Side HS TheoryLow Side LS Theory OUTPUT DEVICE EMULATION PROTECTION ODEPTheory TEST 2 OUTPUT BIAS ADJUSTMENT Electrical Checkout ProceduresTEST 3 ODEP VOLTAGE ADJUSTMENT STANDARD INITIAL CONDITIONSTEST 7 PHASE RESPONSE TEST 4 AC POWER DRAWTEST 12 OUTPUT POWER TEST 5 COMMON MODE REJECTIONTEST 13 REACTIVE LOADS TEST 16 SIGNAL TO NOISE RATIOTEST 14 ODEP LIMITING TEST 15 LF PROTECTIONTEST 19 INTERMODULATION DISTORTION POST TESTINGTEST 20 CLIPPING Electrical Checkout ProceduresPOWER SUPPLY Parts List Non-ModuleOUTPUT ASSEMBLY ONE PER CHANNEL SUPPLIMENTAL ITEMSBACK PANEL ASSEMBLY OUTPUT ASSEMBLY CONTCHASSIS FRONT ASSEMBLY MAIN CHASSIS ASSEMBLYMAIN CHASSIS ASSEMBLY CONT Parts List Non-ModuleSCHEMATIC INFORMATION Module and Schematic InformationMODULE HISTORY MAIN MODULESM43530-1LED ASSEMBLY SUPPLY Fuse and Display Module Parts ListsM43534-3FUSE MODULE Q42866-6CHANNEL 2 FUSE MODULECAPACITORS Q42549-8Output Module P10115-7board Parts ListDIODES INDUCTORSCAPACITORS Q42647-0Output Module P10137-1board Parts ListDIODES INDUCTORSCAPACITORS Q42717-1Output Module P10233-8board Parts ListDIODES INDUCTORSCAPACITORS Q42871-6Output Module P10305-4board Parts ListDIODES INDUCTORSCAPACITORS Q42968-0Output Module P10341-9board Parts ListDIODES INDUCTORSCAPACITORS Q43202-3Output Module P10397-1board Parts ListDIODES INDUCTORSCAPACITORS RESISTOR NETWORKSDIODES TRANSISTORSCONNECTORS SWITCHESINTEGRATED CIRCUITS MOUNTS U1, U2CAPACITORS Q42714-8Main Module D 6910-0board Parts ListDIODES RESISTOR NETWORKSSWITCHES Q42714-8Main Module D 6910-0board Parts List ContCONNECTORS INTEGRATED CIRCUITSCAPACITORS Q42776-7Main Module D 7251-8board Parts ListDIODES RESISTOR NETWORKSSWITCHES Q42776-7Main Module D 7251-1board Parts List ContRESISTORS CONNECTORS Q42776-7Main Module D 7251-1board Parts List ContINTEGRATED CIRCUITS MISCCAPACITORS Q42980-5Main Module D7911-7board Parts ListDIODES RESISTOR NETWORKSRESISTORS Q42980-5Main Module D7911-7board Parts List ContSWITCHES Q42980-5Main Module D7911-7board Parts List ContCONNECTORS INTEGRATED CIRCUITSCAPACITORS Q43035-7Main Module D7993-5board Parts ListDIODES TRANSISTORSRESISTOR NETWORKS Q43035-7Main Module D7993-5board Parts List ContRESISTORS Q43035-7Main Module D7993-5board Parts List Cont IC’SSWITCHES MISCCAPACITORS Q43031-6Main Module D7993-5board Parts ListDIODES TRANSISTORSRESISTOR NETWORKS Q43031-6Main Module D7993-5board Parts List ContRESISTORS SWITCHES Q43031-6Main Module D7993-5board Parts List ContIC’S MISC

POWER AMPLIFIER

SERVICE MANUAL

MICRO-TECH®-1200

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

K-SVCMT12