Crown Audio 1200 service manual Table of Contents

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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 MICRO-TECH-1200 Avis Table of Contents Warranty IntroductionScope Parts Information Power SpecificationsVoltage Conversion Front END Operation FeaturesTheory OverviewVoltage Translators Voltage AmplificationGrounded Bridge Topology Last Voltage Amplifiers LVAsLow Side LS High Side HSOutput Device Emulation Protection Odep Positive Standard Initial Conditions Electrical Checkout ProceduresTest 2 Output Bias Adjustment Test 3 Odep Voltage AdjustmentTest 12 Output Power Test 4 AC Power DrawTest 5 Common Mode Rejection Test 7 Phase ResponseTest 15 LF Protection Test 16 Signal to Noise RatioTest 13 Reactive Loads Test 14 Odep LimitingSpec at 0 dB Output 0.01% Spec at -35 dB Output 0.05% Post TestingTest 19 Intermodulation Distortion Test 20 ClippingSupplimental Items Parts List Non-ModulePower Supply Output Assembly ONE PER ChannelMain Chassis Assembly Output AssemblyBack Panel Assembly Chassis Front AssemblyParts List Non-Module Module and Schematic Information Fuse and Display Module Parts Lists Q42549-8 Output Module P10115-7 board Parts List Q42647-0 Output Module P10137-1 board Parts List Q42717-1 Output Module P10233-8 board Parts List Q42871-6 Output Module P10305-4 board Parts List Q42968-0 Output Module P10341-9 board Parts List Q43202-3 Output Module P10397-1 board Parts List Resistor Networks Q42552A0 Main Module D6304A4/D6304B2 board Parts ListMounts U1, U2 SwitchesConnectors Integrated CircuitsQ42714-8 Main Module D 6910-0 board Parts List Dpdt Open Q42776-7 Main Module D 7251-8 board Parts ListQ42776-7 Main Module D 7251-1 board Parts List HDR, 5 PIN Q42980-5 Main Module D7911-7 board Parts List Resistors DP3T NPN MPS8097 Q43035-7 Main Module D7993-5 board Parts ListJumper IC’S Q43031-6 Main Module D7993-5 board Parts List Resistor Networks Switches