Sharp MD-M3 Service Manual

– 1 –MD-M3/M1CONTENTSMD-M3SERVICE MANUALSHARP CORPORATIONNo.S6940MDM3M1//• In the interests of user-safety the set should be restored to its originalcondition and only parts identical to those specified should be used.This document has been published to be usedfor after sales service only.The contents are subject to change without notice.PageIMPORTANT SERVICE NOTES (FOR U.S.A. ONLY) ........................................................................................................ 2SPECIFICATIONS .............................................................................................................................................................. 3NAMES OF PARTS ........................................................................................................................................................... 4OPERATION MANUAL ....................................................................................................................................................... 7QUICK GUIDE .................................................................................................................................................................... 9DISASSEMBLY ................................................................................................................................................................ 11REMOVING AND REINSTALLING THE MAIN PARTS ................................................................................................... 13TEST MODE .................................................................................................................................................................... 15ADJUSTMENT ................................................................................................................................................................. 17EEPROM WRITING PROCEDURE .................................................................................................................................. 23EXPLANATION OF MECHANISM ERROR ...................................................................................................................... 24EXPLANATION OF ERROR DISPLAY ............................................................................................................................. 25NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 26TYPE OF TRANSISTOR AND LED ................................................................................................................................. 26BLOCK DIAGRAM ........................................................................................................................................................... 27SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD ............................................................................................. 32WAVEFORMS OF CD CIRCUIT ...................................................................................................................................... 54WAVEFORMS OF MD CIRCUIT ..................................................................................................................................... 55TROUBLE SHOOTING (CD SECTION) .......................................................................................................................... 57TROUBLE SHOOTING (MD SECTION) ........................................................................................................................... 61TROUBLE SHOOTING (POWER SUPPLY SECTION) ................................................................................................... 65FUNCTION TABLE OF IC ................................................................................................................................................ 66REPLACEMENT PARTS LIST/EXPLODED VIEW/PACKING OF THE SET (FOR U.S.A.)MD-M3 MD micro System consisting ofMD-M3(main unit) and CP-M3(speakersystem).MD-M1 MD micro System consisting ofMD-M1(main unit) and CP-M1(speakersystem).Illustration: MD-M3Illustration: MD-M1MD-M1