Sony MZ-R90/R91, MT-MZR70-165 000P * * R, E I B, 000S t a t 000A d r s 000B E m p 000# # # # # #

Contents US Model Canadian ModelAEP Model UK ModelFlexible Circuit Board Repairing Notes on chip component replacementTABLE OF CONTENTS SECTION SERVICING NOTE NOTES ON LASER DIODE EMISSION CHECKNOTES ON HANDLING THE OPTICAL PICK-UPBLOCK LCX-2R OPTICAL PICK-UPFLEXIBLE BOARDSECTION 2 GENERAL Page Page SECTION DISASSEMBLY 3-3.LCD MODULE 3-4.MAIN BOARD3-5.MD MECHANISM DECK MT-MZR70-165 3-6.SERVICE ASSY, OPover write head section 3-7.HOLDER ASSY 3-8.MOTOR FLEXIBLE BOARD3-9.MOTOR, DC M602 3-10.“MOTOR, DC M601”, “MOTOR, DC M603”SECTION 4 TEST MODE 4-2-2.Operation in Setting the Test Mode4-2-1.Setting Method of Test Mode 888xxxxxxxxxFREC1SHUF000M a n u a l 011 C 6 8 S 011 0 F FJ011 0 6 3 B 011 0 5 9 A000P * * R E I B000S t a t 000A d r s 000B E m p 000# # # # # # 000P * * R 000B O v r 000B f u l 000R t r y0001 s t 0001 s t 0001 s t 0001 s t000N - 1 000N - 1 000N - 2 000N - 2 000N 000R # # # #Description of Error Indication Codes • Description of Indication History4-7.KEY CHECK MODE SECTION ELECTRICAL ADJUSTMENTS 021R e s N021R e s O K ? 021R e s762V c l P W M 765V c h P W M763V r h V c l 766V r h V c h014S e t T m p 000 A s s yC D R U N 341 C D O K043R e s u m e 043R e s C l rConnection Check MethodConnecting Location MZ-R70 DIAGRAMSSECTION MZ-R70 MZ-R70 6-3.BLOCK DIAGRAM - POWER SUPPLY SECTIONWaveforms Page Page Refer to page 41 for IC Block Diagrams MZ-R70MZ-R70 MZ-R70 IC501 SN761056IC302 NJM2173IC601 MPC17A56FTAIC603 MPC18A21MTBIC301 IC901 MPC18A31FTAAK4517-VQ-L 6-9.IC PIN DESCRIPTIONS MAIN BOARD IC502 CXD2660GA Page Page Page Page Page SECTION EXPLODED VIEWS Page SECTION ELECTRICAL PARTS LIST MAINMAIN MAIN MAIN MAIN Sony Corporation MZ-R70Personal Audio Division Company Published by General Engineering DeptUS Model Canadian Model AEP Model UK Model E Model Australian Model Chinese ModelVer Subject Taiwan model Addition