Assessments - 3, GPA: 4.3
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Box 1000, Elkhart, Indiana 46515-1000 U.S.A. Telephone: 219-294-8000. Trademark Notice: Distributed Intelligence™ and IQ for Windows™ are trademarks and Crown®, IQ®, and IQ System® are registered trademarks of Crown International, Inc. Other trademarks are the property of their respective owners. Models: IQ-USM 810 Some models may be exported under the name Amcron.® 130447-1 Rev. A IQ-USM 810 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: Plant 2 SW 1718 W. Mishawaka Road Elkhart IN 46517 Phone: (800) 342-6939 / (219) 294-8200 FAX: (219) 294-8301 TO PREVENT ELECTRIC SHOCK DO NOT REMOVE TOP OR BOTTOM COVERS. NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. DISCONNECT POWER CORD BEFORE REMOVING REAR INPUT MODULE TO ACCESS GAIN SWITCH. CAUTION A PREVENIR LE CHOC ELECTRIQUE N’ENLEVEZ PAS LES COUVERTURES. RIEN DES PARTIES UTILES A L’INTERIEUR. DEBRANCHER LA BORNE AVANT D’OUVRIR LA MODULE EN ARRIERE. AVIS WARNING TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE! The exclamation point The lightning bolt triangle is used to alert the triangle is used to user to important operating alert the user to the or maintenance instructions. risk of electric shock. ©2000 Crown International, Inc. IQ-USM 810 Service Manual 130447-1 Rev. A Revision History Revision Number Date Comments Rev. A 04-2000 Initial Printing ©2000 Crown International, Inc. 130447-1 Rev. A IQ-USM 810 Service Manual This page intentionally left blank ©2000 Crown International, Inc. IQ-USM 810 Service Manual 130447-1 Rev. A Table of Contents 1 Introduction ............................................................................ 1-1 1.1 Introduction ................................................................................ 1-1 1.2 The IQ-USM 810 ........................................................................ 1-1 1.3 Warranty ..................................................................................... 1-1 2 Specifications ......................................................................... 2-1 3 Circuit Theory ........................................................................ 3-1 3.1 Overview .................................................................................... 3-1 3.2 Power Supply ............................................................................. 3-1 3.3 Input ........................................................................................... 3-1 3.3.1 Input Analog Processing ................................................... 3-1 3.3.2 Clock Signals .................................................................... 3-2 3.3.3 A/D Conversion ................................................................. 3-2 3.3.4 DC Voltages ...................................................................... 3-4 3.4 Output ........................................................................................ 3-4 3.4.1 Clock Buffers ..................................................................... 3-4 3.4.2 DAC Conversion................................................................3-4 3.4.3 Output Analog Processing ................................................ 3-4 3.5 SHARC Processing .................................................................... 3-5 3.5.1 +3.3V Power Supply..........................................................3-5 3.5.2 Clocks ............................................................................... 3-5 3.5.3 Reset ................................................................................. 3-5 3.5.4 System Control Interface ................................................... 3-5 3.5.5 PLDs .................................................................................. 3-6 3.5.6 Bus Arbitration...................................................................3-6 3.5.7 Bus Utilization....................................................................3-6 3.5.8 DSP Processing ................................................................ 3-6 3.5.9 Audio Routing....................................................................3-8 3.6 System Controller ....................................................................... 3-8 3.6.1 Control Processing ............................................................ 3-9 3.6.2 RS232 .............................................................................. 3-10 3.6.3 Crown Bus Loop..............................................................3-10 3.6.4 Real Time Clock .............................................................. 3-10 3.6.5 Front Panel ..........