Sharp MD-MT20 Service Manual

Contents

MD-MT20/20C/20W– 1 –CONTENTSPageSAFETY PRECAUTION FOR SERVICE MANUAL (MD-MT20W ONLY).............................................................................. 2SPECIFICATIONS ................................................................................................................................................................. 3NAMES OF PARTS ............................................................................................................................................................... 4OPERATION MANUAL .......................................................................................................................................................... 5QUICK GUIDE (MD-MT20 ONLY) ......................................................................................................................................... 8DISASSEMBLY .................................................................................................................................................................... 10REMOVING AND REINSTALLING THE MAIN PARTS ....................................................................................................... 11ADJUSTMENT ...................................................................................................................................................................... 12NOTES ON SCHEMATIC DIAGRAM .................................................................................................................................. 25TYPES OF TRANSISTOR AND DIODE .............................................................................................................................. 25VOLTAGE ............................................................................................................................................................................ 26BLOCK DIAGRAM ............................................................................................................................................................... 27SCHEMATIC DIAGRAM ...................................................................................................................................................... 28WIRING SIDE OF P.W.BOARD ........................................................................................................................................... 31WAVEFORMS OF MD CIRCUIT ......................................................................................................................................... 36TROUBLE SHOOTING ........................................................................................................................................................ 37FUNCTION TABLE OF IC .................................................................................................................................................... 40CIRCUIT DESCRIPTION ..................................................................................................................................................... 42PARTS GUIDE/EXPLODED VIEWPACKING OF THE SET (MD-MT20 ONLY)SERVICE MANUALSHARP CORPORATIONNo. S6943MDMT20//This document has been published to be usedfor after sales service only.The contents are subject to change without notice.MD-MT20(S)MD-MT20C(S)MD-MT20W(BL)MD-MT20W(GL)MD-MT20W(S)• In the interests of user-safety the set should be restored to itsoriginal condition and only parts identical to those specified beused.Illustration: MD-MT20/20CIllustration: MD-MT20W