Sony MDS-JB920 service manual Varning, Varoitus, Flexible Circuit Board Repairing

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CAUTION

Danger of explosion if battery is incorrectly replaced.

Replace only with the same or equivalent type recommended by the manufacturer.

Discard used batteries according to the manufacturer’s instruc- tions.

ADVARSEL!

Lithiumbatteri-Eksplosionsfare ved fejlagtig håndtering.

Udskiftning må kun ske med batteri af samme fabrikat og type.

Levér det brugte batteri tilbage til leverandøren.

ADVARSEL

Eksplosjonsfare ved feilaktig skifte av batteri.

Benytt samme batteritype eller en tilsvarende type

anbefalt av apparatfabrikanten.

Brukte batterier kasseres i henhold til fabrikantens

instruksjoner.

VARNING

Explosionsfara vid felaktigt batteribyte.

Använd samma batterityp eller en likvärdig typ som rekommenderas av apparattillverkaren.

Kassera använt batteri enligt gällande föreskrifter.

VAROITUS

Paristo voi räjähtää, jos se on virheellisesti asennettu.

Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin. Hävitä käytetty paristo valmistajan ohjeiden mukaisesti.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS

AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB- LISHED BY SONY.

Laser component in this product is capable of emitting radia- tion exceeding the limit for Class 1.

This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PROD- UCT MARKING is located on the rear exterior.

This caution label is located inside the unit.

CAUTION

Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous ra- diation exposure.

Flexible Circuit Board Repairing

•Keep the temperature of the soldering iron around 270 ˚C dur- ing repairing.

•Do not touch the soldering iron on the same conductor of the circuit board (within 3 times).

•Be careful not to apply force on the conductor when soldering or unsoldering.

Notes on chip component replacement

•Never reuse a disconnected chip component.

•Notice that the minus side of a tantalum capacitor may be dam- aged by heat.

ATTENTION AU COMPOSANT AYANT RAPPORT À LA SÉCURITÉ!

LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE !

SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COM- POSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

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Contents MDM-5A SpecificationsMDS-JE520 General SELF-DIAGNOSIS FunctionItems of Error History Mode Items and Contents Section Servicing Notes Table of ContentsDiagrams Varoitus Flexible Circuit Board RepairingVarning IOP JIG for Checking BD Board WaveformRecord Precedure REC/PLAY Checks Prior to Parts Replacement and AdjustmentsForced Reset Precedure Retry Cause Display ModeHexadecimal nBinary Conversion Table Front view Rear view Section GeneralLocation of Controls Page Page Case Section DisassemblyMain Board Front Panel SecitonSlider CAM Mechanism Section MDM-5ASW BOARD, Loading Motor M103 Base Unit MBU-5A, BD BoardPrecautions for USE of Test Mode Section Test ModeSetting the Test Mode Exiting the Test ModeDisplay Contents Mark Group Selecting the Test ModeMID Operating the Continuous Playback ModeNon-Volatile Memory Mode EEP Mode Functions of Other Buttons Test Mode DisplaysAuto gain display Not used in servicing Detrack check display Not used in servicingMeanings of Other Displays Display Contents When Lit When OffParts Replacement and Adjustment Section Electrical AdjustmentsPrecautions for USE of Optical PICK-UP KMS-260A Precautions for Checking Laser Diode EmissinonPrecautions for Adjustments Laser power meterLaser Power Check Temperature Compensation Offset CheckCheck Prior to Repairs Traverse CheckCD Error Rate Check Play Checking MO Error Rate CheckFocus Bias Check Self-Recording/playback CheckTemperature Compensation Offset Adjutment Initial Setting of Adjustment ValueLaser Power Adjustment Recording and Displaying the IOP InformationTraverse 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 AdjustmentAdjusting Points and Connecting Points IC PIN Function Description Section DiagramsBD Board IC101 CXA2523AR RF AMP, FOCUS/TRACKING Error AMP Sens SrdtXrst SqsyXWE XrasMvci AsyoSfdr SrdrSprd SpfdMain Board IC100 CXD8607N A/D Converter VDD1 AvddlTEST2 LvddMain Board IC800 M30610MCA-264FP System Controller MDS-JB920 ∙ Signal Path Block Diagram Servo SectionREC Analog REC DigitalPlay Digital OUT Block Diagram Main Section∙ Signal Path Play Analog 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 SeeWaveforms 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 CXA2523ARIC152 BH6511FS-E2 IC121 CXD2654RIC101 CXA8054M Main Board IC100 CXD8607NIC203 CXA8042ASIC200 CXD8767N SN74HCU04ANS-E20 SN74HC153ANSChassis Section Section Exploded ViewsSupplied with RV760 Front Panel Section209 4-988-466-21 Spring ELECTROSTATIC, Leaf 206 201204 205 Base Unit Section MBU-5A Section Electrical Parts List Diode TANTAL. ChipDiode F1J6TP CXA2523ARDisp Main C252 Mylar HZ7.5CP-TK HZS6C1LCXA8042AS SN74HC153ANS390 Coil with Core Vibrator Main PSWLED SEL6210S-TH10 Standby LED SEL6810A-TH10 Mega Control TransistorSW VOL Sony Corporation
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