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Sony MZ-R900 service manual 3131

Models: MZ-R900

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6-5. SCHEMATIC DIAGRAM • See page 33 for Waveforms. • See page 43 for IC Block Diagrams

MZ-R900

3131

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Contents

MZ-R900 PORTABLE MINIDISC RECORDERUS Model Canadian ModelTABLE OF CONTENTS 3.DISASSEMBLY6.DIAGRAMS MZ-R900Notes on chip component replacement Flexible Circuit Board RepairingMZ-R900 SECTION SERVICING NOTES NOTES ON LASER DIODE EMISSION CHECKThe headphones/earphones with a remote control The display window of the remote controlMZ-R900 SECTION GENERAL Looking at controls3-2.PANEL ASSY, BOTTOM MZ-R900 SECTION DISASSEMBLY3-1.DISASSEMBLY FLOW 3-4.“LCD MODULE”, “PANEL ASSY, UPPER” MZ-R9003-3.PANEL ASSY, UPPER SECTION 3-6.“CASE ASSY, BATTERY”, “MAIN BOARD” 2 case assy, battery 3 main boardMZ-R900 3-5.MAIN BOARD ASSYMZ-R900 3-7.STRIP, ORNAMENTAL5 Remove the “strip, ornamental” B in the direction of arrow C3-9.SERVICE ASSY, OP LCX-4R MZ-R9003-11.MOTOR FLEXIBLE BOARD MZ-R9003-10.HOLDER ASSY MZ-R900 3-12.MOTOR, DC SLED M602Setting Method of Test Mode Operation in Setting the Test ModeMZ-R900 SECTION TEST MODE OutlineServo Adjustment Audio AdjustmentOverall Adjustment Mode Major item switching011 0 5 9 A 011 L r e f P w011C 6 8 S 011O F F JReset the error display code Description of Error Indication CodesSetting method of Reset the Error Display Code MZ-R900000P * * R 021Reset MZ-R900 SECTION ELECTRICAL ADJUSTMENTSSetting method of NV reset Change of Adjusted ValuesAdjustment sequence Adjustment method of Vc PWM Duty L item numberAdjustment method of Vc PWM Duty H item number Adjustment method of Vl PWM Duty item numberLaser Power Check Adjustment Method of temperature correction000 ADJ OK 014 SetTmpConfiguration of overall adjustment Overall Adjustment Mode Title DisplayElectrical Offset Adjusting Method MZ-R900Overall CD and MO adjustment items 000 Assy11XXXCD RUN 000 *** NG043 Resume CC 0230D6000 0230D5DAA 0230D6909 0230D751C DIAGRAMS SIGNAL PATHSECTION MZ-R900• SIGNAL PATH MZ-R900PLAYBACK REC ANALOG INPage MZ-R900 WaveformsMZ-R900 MZ-R900 3131IC Block Diagrams MZ-R900IC301 AK4562VNS-LIC551 SC111257FCR2IC601 XPC18A22FCR2MZ-R900 6-6.IC PIN FUNCTION DESCRIPTIONPin No Pin NameMZ-R900 PAUSE KEYFocus error signal input from RF amp IC501 MZ-R900MZ-R900 DSPVDD2MZ-R900 156MZ-R900 XPD ADASECTION EXPLODED VIEWS MZ-R9007-1.PANEL SECTION 2 1 9 2 7 8 2 2 6MZ-R900 7-2.CHASSIS SECTIONMZ-R900 7-3.MD MECHANISM DECK SECTION MT-MZR900-171ELECTRICAL PARTS LIST MZ-R900SECTION MAINRef. No MZ-R900MAIN MZ-R900 MAIN Ref. No MZ-R900MAIN MZ-R900 Ref. NoMEMO MZ-R900REVISION HISTORY MZ-R900Date Description of Revision