Manuals / Crown Audio / Home Audio / Stereo Amplifier

Crown Audio 1200 service manual Table of Contents

Models: 1200

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Micro-Tech 1200 Amplifier Service Manual
Table of Contents
Introduction	4
Scope	4
Warranty	4
Parts Information	5
Specifications	6
Voltage Conversion	7
Circuit Theory	8
Electrical Checkout Procedures	13
Parts List (Non-Module)	17
Module and Schematic Information	20
Fuse and Display Modules	21
Q42549-8 Output Module	22
Q42647-0 Output Module	23
Q42717-1 Output Module	24
Q42871-6 Output Module	25
Q42968-0 Output Module	26
Q43202-3 Output Module	27
Q42552A0 Main Module	28
Q42714-8 Main Module	30
Q42776-7 Main Module	32
Q42980-5 Main Module	35
Q43035-7 Main Module	38
Q43031-6 Main Module	41

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Contents

Elkhart, IN U.S.A POWER AMPLIFIERMICRO-TECH-1200 Elkhart, IN U.S.AAVIS Table of Contents Crown WARRANTYIntroduction SCOPESTANDARD AND SPECIAL PARTS Parts InformationGENERAL INFORMATION PART NUMBERING SYSTEMSMECHANICAL SpecificationsPOWER Power PERFORMANCEVoltage Conversion FRONT END OPERATION FEATURESTheory OVERVIEWLast Voltage Amplifiers LVAs VOLTAGE AMPLIFICATIONGROUNDED BRIDGE TOPOLOGY TheoryTheory High Side HSLow Side LS Theory OUTPUT DEVICE EMULATION PROTECTION ODEPTheory STANDARD INITIAL CONDITIONS Electrical Checkout ProceduresTEST 2 OUTPUT BIAS ADJUSTMENT TEST 3 ODEP VOLTAGE ADJUSTMENTTEST 5 COMMON MODE REJECTION TEST 4 AC POWER DRAWTEST 7 PHASE RESPONSE TEST 12 OUTPUT POWERTEST 15 LF PROTECTION TEST 16 SIGNAL TO NOISE RATIOTEST 13 REACTIVE LOADS TEST 14 ODEP LIMITINGElectrical Checkout Procedures POST TESTINGTEST 19 INTERMODULATION DISTORTION TEST 20 CLIPPINGSUPPLIMENTAL ITEMS Parts List Non-ModulePOWER SUPPLY OUTPUT ASSEMBLY ONE PER CHANNELMAIN CHASSIS ASSEMBLY OUTPUT ASSEMBLY CONTBACK PANEL ASSEMBLY CHASSIS FRONT ASSEMBLYMAIN CHASSIS ASSEMBLY CONT Parts List Non-ModuleMAIN MODULES Module and Schematic InformationSCHEMATIC INFORMATION MODULE HISTORYQ42866-6CHANNEL 2 FUSE MODULE Fuse and Display Module Parts ListsM43530-1LED ASSEMBLY SUPPLY M43534-3FUSE MODULEINDUCTORS Q42549-8Output Module P10115-7board Parts ListCAPACITORS DIODESINDUCTORS Q42647-0Output Module P10137-1board Parts ListCAPACITORS DIODESINDUCTORS Q42717-1Output Module P10233-8board Parts ListCAPACITORS DIODESINDUCTORS Q42871-6Output Module P10305-4board Parts ListCAPACITORS DIODESINDUCTORS Q42968-0Output Module P10341-9board Parts ListCAPACITORS DIODESINDUCTORS Q43202-3Output Module P10397-1board Parts ListCAPACITORS DIODESTRANSISTORS RESISTOR NETWORKSCAPACITORS DIODESMOUNTS U1, U2 SWITCHESCONNECTORS INTEGRATED CIRCUITSRESISTOR NETWORKS Q42714-8Main Module D 6910-0board Parts ListCAPACITORS DIODESINTEGRATED CIRCUITS Q42714-8Main Module D 6910-0board Parts List ContSWITCHES CONNECTORSRESISTOR NETWORKS Q42776-7Main Module D 7251-8board Parts ListCAPACITORS DIODESQ42776-7Main Module D 7251-1board Parts List Cont SWITCHESRESISTORS MISC Q42776-7Main Module D 7251-1board Parts List ContCONNECTORS INTEGRATED CIRCUITSRESISTOR NETWORKS Q42980-5Main Module D7911-7board Parts ListCAPACITORS DIODESRESISTORS Q42980-5Main Module D7911-7board Parts List ContINTEGRATED CIRCUITS Q42980-5Main Module D7911-7board Parts List ContSWITCHES CONNECTORSTRANSISTORS Q43035-7Main Module D7993-5board Parts ListCAPACITORS DIODESQ43035-7Main Module D7993-5board Parts List Cont RESISTOR NETWORKSRESISTORS MISC IC’SQ43035-7Main Module D7993-5board Parts List Cont SWITCHESTRANSISTORS Q43031-6Main Module D7993-5board Parts ListCAPACITORS DIODESQ43031-6Main Module D7993-5board Parts List Cont RESISTOR NETWORKSRESISTORS MISC Q43031-6Main Module D7993-5board Parts List ContSWITCHES IC’S