Crown Audio 1200 service manual Avis

Page 2

Micro-Tech 1200 Amplifier Service Manual

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

Mail: P.O. Box 1000 Elkhart IN 46515-1000

Shipping: 57620 C.R. 105 Elkhart IN 46517

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

FAX: (219) 294-8301


	CAUTION			AVIS

TO PREVENT ELECTRIC SHOCK DO
NOT REMOVE TOP OR BOTTOM			À PRÉVENIR LE CHOC
COVERS. NO USER SERVICEABLE			ÉLECTRIQUE N’ENLEVEZ
PARTS INSIDE. REFER SERVICING			PAS LES COUVERTURES.
TO QUALIFIED SERVICE				RIEN DES PARTIES
PERSONNEL. DISCONNECT			UTILES À L’INTÉRIEUR.
POWER CORD BEFORE REMOVING			DÉBRANCHER LA BORNE
REAR INPUT MODULE TO ACCESS			AVANT D’OUVRIR LA
	GAIN SWITCH.		MODULE EN ARRIÈRE.

WARNING

TO REDUCE THE RISK OF ELECTRIC

SHOCK, DO NOT EXPOSE THIS

EQUIPMENT TO RAIN OR MOISTURE!

2

Image 2

Contents MICRO-TECH-1200 Avis Table of Contents Scope WarrantyIntroduction Parts Information Specifications PowerVoltage Conversion Overview FeaturesTheory Front END OperationLast Voltage Amplifiers LVAs Voltage AmplificationGrounded Bridge Topology Voltage TranslatorsHigh Side HS Low Side LSOutput Device Emulation Protection Odep Positive Test 3 Odep Voltage Adjustment Electrical Checkout ProceduresTest 2 Output Bias Adjustment Standard Initial ConditionsTest 7 Phase Response Test 4 AC Power DrawTest 5 Common Mode Rejection Test 12 Output PowerTest 14 Odep Limiting Test 16 Signal to Noise RatioTest 13 Reactive Loads Test 15 LF ProtectionTest 20 Clipping Post TestingTest 19 Intermodulation Distortion Spec at 0 dB Output 0.01% Spec at -35 dB Output 0.05%Output Assembly ONE PER Channel Parts List Non-ModulePower Supply Supplimental ItemsChassis Front Assembly Output AssemblyBack Panel Assembly Main Chassis 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 Q42552A0 Main Module D6304A4/D6304B2 board Parts List Resistor NetworksIntegrated Circuits SwitchesConnectors Mounts U1, U2Q42714-8 Main Module D 6910-0 board Parts List Dpdt Q42776-7 Main Module D 7251-8 board Parts List OpenQ42776-7 Main Module D 7251-1 board Parts List HDR, 5 PIN Q42980-5 Main Module D7911-7 board Parts List Resistors DP3T Q43035-7 Main Module D7993-5 board Parts List NPN MPS8097Jumper IC’S Q43031-6 Main Module D7993-5 board Parts List Resistor Networks Switches