Sony MDS-JB920 guide

MDS-JB920

6-10. SCHEMATIC DIAGRAM – MAIN Section (3/3) – See• page 53 and 54 for Waveforms. •See page 72 and 73 for IC Block Diagrams.

(Page 58)

(Page 68)

(Page 68)

(Page 56)

Note:

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

no mark : PB

∗: Impossible to measure

– 59 –

– 60 –

Image 49

Sony MDS-JB920 service manual

Contents

MDS-JE520 SpecificationsMDM-5A General SELF-DIAGNOSIS Function Items of Error History Mode Items and Contents Diagrams Table of ContentsSection Servicing Notes Varning Flexible Circuit Board RepairingVaroitus IOP JIG for Checking BD Board Waveform Record Precedure Forced Reset Checks Prior to Parts Replacement and AdjustmentsREC/PLAY Precedure Retry Cause Display Mode Hexadecimal nBinary Conversion Table Location of Controls Section GeneralFront view Rear view Page Page Case Section Disassembly Main Board Front Panel Seciton Slider CAM Mechanism Section MDM-5A SW BOARD, Loading Motor M103 Base Unit MBU-5A, BD Board Precautions for USE of Test Mode Section Test ModeSetting the Test Mode Exiting the Test Mode Display Contents Mark Group Selecting the Test Mode Non-Volatile Memory Mode EEP Mode Operating the Continuous Playback ModeMID Functions of Other Buttons Test Mode DisplaysAuto gain display Not used in servicing Detrack check display Not used in servicing Meanings of Other Displays Display Contents When Lit When Off Parts Replacement and Adjustment Section Electrical Adjustments Precautions for USE of Optical PICK-UP KMS-260A Precautions for Checking Laser Diode EmissinonPrecautions for Adjustments Laser power meter Laser Power Check Temperature Compensation Offset CheckCheck Prior to Repairs Traverse Check CD Error Rate Check Play Checking MO Error Rate CheckFocus Bias Check Self-Recording/playback Check Temperature Compensation Offset Adjutment Initial Setting of Adjustment ValueLaser Power Adjustment Recording and Displaying the IOP Information Traverse Adjustment Focus Bias Adjustment Auto Gain Control Output Level Adjustment Error Rate CheckCD Auto Gain Control Output Level Adjustment MO Auto Gain Control Output Level Adjustment Adjusting Points and Connecting Points BD Board IC101 CXA2523AR RF AMP, FOCUS/TRACKING Error AMP Section DiagramsIC PIN Function Description Sens SrdtXrst Sqsy XWE XrasMvci Asyo Sfdr SrdrSprd Spfd Main Board IC100 CXD8607N A/D Converter VDD1 AvddlTEST2 Lvdd Main Board IC800 M30610MCA-264FP System Controller MDS-JB920 ∙ Signal Path Block Diagram Servo SectionREC Analog REC Digital ∙ Signal Path Play Analog OUT Block Diagram Main SectionPlay Digital OUT Circuit Boards Location Printed Wiring Boards BD Section MDS-JB920 53 for Waveforms. See page 70 and 71 for IC Block Diagrams Schematic Diagram BD /2 See 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 Printed Wiring Board BD Switch Section Schematic Diagram BD Switch SectionIC Block Diagrams BD Board IC101 CXA2523AR IC152 BH6511FS-E2 IC121 CXD2654R IC101 CXA8054M Main Board IC100 CXD8607NIC203 CXA8042AS IC200 CXD8767N SN74HCU04ANS-E20 SN74HC153ANS Chassis Section Section Exploded Views Supplied with RV760 Front Panel Section 204 205 206 201209 4-988-466-21 Spring ELECTROSTATIC, Leaf Base Unit Section MBU-5A Section Electrical Parts List Diode TANTAL. ChipDiode F1J6TP CXA2523AR Disp Main C252 Mylar HZ7.5CP-TK HZS6C1LCXA8042AS SN74HC153ANS 390 Coil with Core Vibrator Main PSWLED SEL6210S-TH10 Standby LED SEL6810A-TH10 Mega Control Transistor SW VOL Sony Corporation