Sony MDS-JB920 specs

MDS-JB920

6-9. SCHEMATIC DIAGRAM – MAIN Section (2/3) – See• page 72 and 73 for IC Block Diagrams.

(Page 51)

(Page 56)

(Page 59)

Note:

•Voltages and waveforms are dc with respect to ground in playback mode.

no mark : PB

∗: Impossible to measure

The components identified by mark !or dotted line with mark !are critical for safety.

Replace only with part number specified.

Les composants identifiés par une marque !sont critiques pour la sécurité. Ne les remplacer que par une piéce portant le numéro spécifié.

– 57 –

– 58 –

Image 48

Sony MDS-JB920 service manual

Contents

Specifications MDS-JE520MDM-5A SELF-DIAGNOSIS Function General Items of Error History Mode Items and Contents Table of Contents DiagramsSection Servicing Notes Flexible Circuit Board Repairing VarningVaroitus JIG for Checking BD Board Waveform IOP Record Precedure Checks Prior to Parts Replacement and Adjustments Forced ResetREC/PLAY Retry Cause Display Mode Precedure Hexadecimal nBinary Conversion Table Section General Location of ControlsFront view Rear view Page Page Section Disassembly Case Front Panel Seciton Main Board Mechanism Section MDM-5A Slider CAM Base Unit MBU-5A, BD Board SW BOARD, Loading Motor M103 Section Test Mode Precautions for USE of Test ModeSetting the Test Mode Exiting the Test Mode Selecting the Test Mode Display Contents Mark Group Operating the Continuous Playback Mode Non-Volatile Memory Mode EEP ModeMID Test Mode Displays Functions of Other ButtonsAuto gain display Not used in servicing Detrack check display Not used in servicing Display Contents When Lit When Off Meanings of Other Displays Section Electrical Adjustments Parts Replacement and Adjustment Precautions for Checking Laser Diode Emissinon Precautions for USE of Optical PICK-UP KMS-260APrecautions for Adjustments Laser power meter Temperature Compensation Offset Check Laser Power CheckCheck Prior to Repairs Traverse Check Play Checking MO Error Rate Check CD Error Rate CheckFocus Bias Check Self-Recording/playback Check Initial Setting of Adjustment Value Temperature Compensation Offset AdjutmentLaser Power Adjustment Recording and Displaying the IOP Information Traverse Adjustment Focus Bias Adjustment Error Rate Check Auto Gain Control Output Level AdjustmentCD Auto Gain Control Output Level Adjustment MO Auto Gain Control Output Level Adjustment Adjusting Points and Connecting Points Section Diagrams BD Board IC101 CXA2523AR RF AMP, FOCUS/TRACKING Error AMPIC PIN Function Description Srdt SensXrst Sqsy Xras XWEMvci Asyo Srdr SfdrSprd Spfd Main Board IC100 CXD8607N A/D Converter Avddl VDD1TEST2 Lvdd Main Board IC800 M30610MCA-264FP System Controller MDS-JB920 Block Diagram Servo Section ∙ Signal PathREC Analog REC Digital Block Diagram Main Section ∙ Signal Path Play Analog OUTPlay Digital OUT Circuit Boards Location Printed Wiring Boards BD Section MDS-JB920 Schematic Diagram BD /2 See 53 for Waveforms. See page 70 and 71 for IC Block Diagrams Waveforms BD board Main board Disp board MDS-JB920 MDS-JB920 MDS-JB920 MDS-JB920 Other layers pattern Side a US, CND Schematic Diagram Panel Section See page 54 for Waveforms Schematic Diagram BD Switch Section Printed Wiring Board BD Switch SectionIC Block Diagrams BD Board IC101 CXA2523AR IC121 CXD2654R IC152 BH6511FS-E2 Main Board IC100 CXD8607N IC101 CXA8054MIC203 CXA8042AS IC200 CXD8767N SN74HC153ANS SN74HCU04ANS-E20 Section Exploded Views Chassis Section Front Panel Section Supplied with RV760 206 201 204 205209 4-988-466-21 Spring ELECTROSTATIC, Leaf Base Unit Section MBU-5A Section Electrical Parts List TANTAL. Chip DiodeDiode F1J6TP CXA2523AR Disp Main C252 Mylar HZS6C1L HZ7.5CP-TKCXA8042AS SN74HC153ANS 390 Main PSW Coil with Core VibratorLED SEL6210S-TH10 Standby LED SEL6810A-TH10 Mega Control Transistor SW VOL Sony Corporation