MICRO-TECH-1200 | Crown Audio instruction

POWER AMPLIFIER

SERVICE MANUAL

MICRO-TECH®-1200

©1995 by CROWN INTERNATIONAL, INC.

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

Image 1

Crown Audio service manual MICRO-TECH-1200

Contents

MICRO-TECH-1200 Avis Table of Contents Introduction WarrantyScope Parts Information Power Specifications Voltage Conversion Theory FeaturesOverview Front END Operation Grounded Bridge Topology Voltage AmplificationLast Voltage Amplifiers LVAs Voltage Translators Low Side LS High Side HS Output Device Emulation Protection Odep Positive Test 2 Output Bias Adjustment Electrical Checkout ProceduresTest 3 Odep Voltage Adjustment Standard Initial Conditions Test 5 Common Mode Rejection Test 4 AC Power DrawTest 7 Phase Response Test 12 Output Power Test 13 Reactive Loads Test 16 Signal to Noise RatioTest 14 Odep Limiting Test 15 LF Protection Test 19 Intermodulation Distortion Post TestingTest 20 Clipping Spec at 0 dB Output 0.01% Spec at -35 dB Output 0.05% Power Supply Parts List Non-ModuleOutput Assembly ONE PER Channel Supplimental Items Back Panel Assembly Output AssemblyChassis Front Assembly Main Chassis Assembly Parts 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 List Connectors SwitchesIntegrated Circuits Mounts U1, U2 Q42714-8 Main Module D 6910-0 board Parts List Dpdt Open Q42776-7 Main Module D 7251-8 board Parts List Q42776-7 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 List Jumper IC’S Q43031-6 Main Module D7993-5 board Parts List Resistor Networks Switches