Sony-MDSJB930-md-sm 维修电路原理图.pdf

MICROFILMSERVICE MANUALMINIDISC DECKUS ModelCanadian ModelAEP ModelUK ModelSPECIFICATIONSMDS-JB930Model Name Using Similar MechanismMDS-JE520MD Mechanism TypeMDM-5DBU Base Unit TypeMBU-5DOptical Pick-up TypeKMS-260B/J1NU.S. and foreign patents licensed form Dolby LaboratoriesLicensing Corporation.Photo: Black modelRadioFans.CN 收音机爱 好者资料库MICROFILMSERVICE MANUALMINIDISC DECKUS ModelCanadian ModelAEP ModelUK ModelSPECIFICATIONSMDS-JB930Model Name Using Similar MechanismMDS-JE520MD Mechanism TypeMDM-5DBU Base Unit TypeMBU-5DOptical Pick-up TypeKMS-260B/J1NU.S. and foreign patents licensed form Dolby LaboratoriesLicensing Corporation.Photo: Black modelRadioFans.CN 收音机爱 好者资料库2SELF-DIAGNOSIS FUNCTIONThe self-diagnosis function consists of error codes for customers which are displayed automatically when errors occur, and error codeswhich show the error history in the test mode during servicing. For details on how to view error codes for the customer, refer to thefollowing box in the instruction manual. For details on how to check error codes during servicing, refer to the following “Procedure forusing the Self-Diagnosis Function (Error History Display Mode)”.PROCEDURE FOR USING THE SELF-DIAGNOSIS FUNCTION (ERROR HISTORY DISPLAY MODE)Note: Perform the self-diagnosis function in the “error history display mode” in the test mode. The following describes the least required procedure. Becareful not to enter other modes by mistake. If you set other modes accidentally, press the MENU/NO button to exit the mode.1.While pressing the AMS knob and p button, connect the power plug to the outlet, and release the AMS knoband p button.2.Turn the AMS knob and when “Service” is displayed, press the YES button.3.Turn the AMS knob to display “ERR DP MODE”.4.Press the YES button to sets the error history mode and displays “total rec”.5.Select the contents to be displayed or executed using the AMS knob.6.Press the AMS knob to display or execute the contents selected.7.Press the AMS knob another time returns to step 4.8.Press the MENU/NO button to display “ERROR DP MODE” and release the error history mode.9.To release the test mode, press the FILTER button. The unit sets into the STANDBY state, the disc is ejected, and the test mode ends.3ITEMS OF ERROR HISTORY MODE ITEMS AND CONTENTSSelecting the Test ModeDisplayDetails of HistoryE00No errorE01Disc error. PTOC cannot be read(DISC ejected)E02Disc error. UTOC error(DISC not ejected)E03Loading errorE04Address cannot be read (Servo has deviated)Table of Error CodesError CodeError CodeDetails of Errortotal recDisplays the recording time.Displayed as “rh”.The displayed time is the total time the laser is set to the high power state.This is about 1/4 of the actual recording time.The time is displayed in decimal digits from 0h to 65535h.total playDisplays the play time.Displayed as “ph”. The time displayed is the total actual play time. Pauses are not counted.The time is displayed in decimal digits from 0h to 65535h.retry errDisplays the total number of retries during recording and number of retry errors during play.Displayed as “r p”.“r” indicates the retries during recording while “p” indicates the retry errors during play.The number of retries and retry errors are displayed in hexadecimal digits from 00 to FF.total errDisplays the total number of errors.Displayed as “total ”.The number of errors is displayed in hexadecimal digits from 00 to FF.err historyDisplays the 10 latest errors.Displayed as “0 E”. indicates the history number. The smaller the number, the more recent is the error. (00 is the latest). indicates the error code.Refer to the following table for the details. The error history can be switched by turning the AMSknob.er refreshMode which erases the “retry err”, “total err”, and “err history” histories.When returning the unit to the customer after completing repairs, perform this to erase the past error history.After pressing the AMS button and “er refresh?” is displayed, press the YES button to erase thehistory.“Complete!” will be displayed momentarily.Be sure to check the following when this mode has been executed. The data has been erased. The mechanism operates normally when recording and play are performed.tm refreshMode which erases the “total rec” and “total play” histories.These histories serve as approximate indications of when to replace the optical pick-up.If the optical pickup has been replaced, perform this operation and erase the history.After pressing the AMS button and “tm refresh?” is displayed, press the YES button to erase thehistory.“Complete!” will be displayed momentarily.Be sure to check the following when this mode has been executed. The data has been erased. The mechanism operates normally when recording and play are performed.E05FOK has deviatedE06Cannot focus (Servo has deviated)E07Recording retryE08Recording retry errorE09Playback retry error(Access error)E0APlayback retry error (C2 error)Details of Error4SECTION 1SERVICING NOTESSAFETY CHECK-OUTAfter correcting the original service problem, perform the follow-ing safety check before releasing the set to the customer:Check the antenna terminals, metal trim, “metallized” knobs,screws, and all other exposed metal parts for AC leakage.Check leakage as described below.LEAKAGE TESTThe AC leakage from any exposed metal part to earth ground andfrom all exposed metal parts to any exposed metal part having areturn to chassis, must not exceed 0.5 mA (500 microamperes.).Leakage current can be measured by any one of three methods.1.A commercial leakage tester, such as the Simpson 229 or RCAWT-540A. Follow the manufacturers instructions to use theseinstruments.2.A battery-operated AC milliammeter. The Data Precision 245digital multimeter is suitable for this job.3.Measuring the voltage drop across a resistor by means of aVOM or battery-operated AC voltmeter. The “limit” indica-tion is 0.75 V, so analog meters must have an accurate low-voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-amples of a passive VOM that is suitable. Nearly all batteryoperated digital multimeters that have a 2 V AC range are suit-able. (See Fig. A)Fig. A.Using an AC voltmeter to check AC leakage.1.5 k0.15 FACvoltmeter(0.75 V)To Exposed MetalParts on SetEarth GroundMODEL IDENTIFICATION BACK PANEL TABLE OF CONTENTSSELF-DIAGNOSIS FUNCTION.21.SERVICING NOTES.42.GENERAL. 113.DISASSEMBLY. 134.TEST MODE. 175.ELECTRICAL ADJUSTMENTS. 226.DIAGRAMS6-1.Block Diagram SERVO Section . 316-2.Block Diagram MAIN Section . 326-3.Note for Printed Wiring Boards andSchematic Diagrams . 336-4.Printed Wiring Board BD Board . 356-5.Schematic Diagram BD Board (1/2) . 366-6.Schematic Diagram BD Board (2/2) . 376-7.Schematic Diagram SW Board . 386-8.Printed Wiring Board SW Board . 386-9.Schematic Diagram MAIN (1/3) /BAT Boards . 396-10. Schematic Diagram MAIN Board (2/3) . 406-11. Schematic Diagram MAIN Board (3/3) . 416-12. Printed Wiring Board MAIN Board (Side A) . 426-13. Printed Wiring Boards MAIN Board (Side B), BAT Board . 436-14. Printed Wiring Board AC Board . 446-15. Schematic Diagram AC Board . 456-16. Printed Wiring Boards PANEL Section . 466-17. Schematic Diagram PANEL Section . 476-18. IC Pin Function Description . 547.EXPLODED VIEWS. 618.ELECTRICAL PARTS LIST. 65Part No.ModelPart No.AEP, UK models4-998-603-6US model4-998-603-7Canadian model4-998-603-85Flexible 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 thecircuit board (within 3 times). Be careful not to apply force on the conductor when solderingor 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.ADVARSELEksplosjonsfare ved feilaktig skifte av batteri.Benytt samme batteritype eller en tilsvarende typeanbefalt av apparatfabrikanten.Brukte batterier kasseres i henhold til fabrikantensinstruksjoner.VARNINGExplosionsfara vid felaktigt batteribyte.Anvnd samma batterityp eller en likvrdig typ som rekommenderas av apparattillverkaren.Kassera anvnt batteri enligt gllande freskrifter.VAROITUSParisto voi rjht, jos se on virheellisesti asennettu.Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin.Hvit kytetty paristo valmistajan ohjeiden mukaisesti.ADVARSEL!Lithiumbatteri-Eksplosionsfare ved fejlagtig hndtering.Udskiftning m kun ske med batteriaf samme fabrikat og type.Levr det brugte batteri tilbage til leverandren.CAUTIONDanger of explosion if battery is incorrectly replaced.Replace only with the same or equivalent type recommended bythe manufacturer.Discard used batteries according to the manufacturers instruc-tions.CAUTIONUse of controls or adjustments or performance of proceduresother than those specified herein may result in hazardous ra-diation exposure.Laser component in this product is capable of emitting radia-tion exceeding the limit for Class 1.This appliance is classified asa CLASS 1 LASER product.The CLASS 1 LASER PROD-UCT MARKING is located onthe rear exterior.This cautionlabel is locatedinside the unit.ATTENTION AU COMPOSANT AYANT RAPPORT LA SCURIT!LES COMPOSANTS IDENTIFIS PAR UNE MARQUE !SUR LES DIAGRAMMES SCHMATIQUES ET LA LISTEDES PICES SONT CRITIQUES POUR LA SCURITDE FONCTIONNEMENT. NE REMPLACER CES COM-POSANTS QUE PAR DES PICES SONY DONT LESNUMROS SONT DONNS DANS CE MANUEL OUDANS LES SUPPLMENTS PUBLIS PAR SONY.SAFETY-RELATED COMPONENT WARNING!COMPONENTS IDENTIFIED BY MARK ! OR DOTTEDLINE WITH MARK ! ON THE SCHEMATIC DIAGRAMSAND IN THE PARTS LIST ARE CRITICAL TO SAFEOPERATION. REPLACE THESE COMPONENTS WITHSONY PARTS WHOSE PART NUMBERS APPEAR ASSHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-LISHED BY SONY.The laser diode in the optical pick-up block may suffer electro-static break-down because of the potential difference generatedby the charged electrostatic load, etc. on clothing and the humanbody.During repair, pay attention to electrostatic break-down and alsouse the procedure in the printed matter which is included in therepair parts.The flexible board is easily damaged and should be handled withcare.NOTES ON LASER DIODE EMISSION CHECKThe laser beam on this model is concentrated so as to be focusedon the disc reflective surface by the objective lens in the opticalpick-up block. Therefore, when checking the laser diode emis-sion, observe from more than 30 cm away from the objective lens.NOTES ON HANDLING THE OPTICAL PICK-UPBLOCK OR BASE UNIT6JIG FOR CHECKING BD BOARD WAVEFORMThe special jig (J-2501-149-A) is useful for checking the waveform of the BD board. The names of terminals and the checking items to beperformed are shown as follows.GND: GroundI+3V : For measuring IOP (Check the deterioration of the optical pick-up laser)IOP : For measuring IOP (Check the deterioration of the optical pick-up laser)TEO : TRK error signal (Traverse adjustment)VC: Reference level for checking the signalRF: RF signal (Check jitter)CN110RF5P Connector6P connectorVCTEOIOPI+3VGNDMechanism deckRFVCTEOfor MDM-3for MDM-5IOPI+3VVCRFTEOIOPI+3VGNDVCRFTEOIOPI+3VGND15167IOP DATA RECORDING AND DISPLAY WHEN OPTICAL PICK-UP AND NON-VOLATILE MEMORY (IC171 OFBD BOARD) ARE REPLACEDThe IOP value labeled on the optical pick-up can be recorded in the non-volatile memory. By recording the value, it will eliminate the needto look at the value on the optical pick-up label. When replacing the optical pick-up or non-volatile memory (IC171 of BD board), recordthe IOP value on the optical pick-up according to the following procedure.Record Procedure:1.While pressing the AMS knob and p button, connect the power plug to the outlet, and release the AMS knoband p button.2.Turn the AMS knob to display “Service”, and press the YES button.3.Turn the AMS knob to display “lop Write” (C28), and press the YES button.4.The display becomes “Ref=.” ( is an arbitrary number) and the numbers which can be changed will blink.5.Input the IOP value written on the optical pick-up label.To select the number: Turn the AMS knob.To select the digit: Press the AMS knob.6.When the YES button is pressed, the display becomes “Measu=.” ( is an arbitrary number).7.As the adjustment results are recorded for the 6 value. Leave it as it is and press the YES button.8.“Complete!” will be displayed momentarily. The value will be recorded in the non-volatile memory and the display will become “IopWrite”.9.Press the FILTER button to complete.Display Procedure:1.While pressing the AMS knob and p button, connect the power plug to the outlet, and release the AMS knoband p button.2.Turn the AMS knob to display “Service”, and press the YES button.3.Turn the AMS knob to display “lop Read” (C27).4.“./#.#” is displayed and the recorded contents are displayed.: indicates the IOP value on the optical pick-up label.#.#: indicates the IOP value after adjustment5.To end, press the AMS knob or MENU/NO button to display “Iop Read”. Then press the FILTER button.FORCED RESETThe system microprocessor can be reset in the following procedure.Use these procedure when the unit cannot be operated normally due to the overrunning of the microprocessor, etc.Procedure :Disconnect the power plug, short-circuit jumper wire of JW705 and JW706 (RESET). BAT BOARD (Component Side) JW706JW705CN7038CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTSBefore performing repairs, perform the following checks to determine the faulty locations up to a certain extent.Details of the procedures are described in “5 Electrical Adjustments”. 0.9 mW powerSpecified value : 0.84 to 0.92 mW 7.0 mW powerSpecified value : 6.8 to 7.2 mWlop (at 7mW) Labeled on the optical pickupIop value 10mA Traverse waveformSpecified value : Below 10% offset Error rate checkSpecified value : For points a, b, and cC1 error : About 200AD error : Above 00 Error rate checkSpecified value:a. When using test disc (MDW-74/AU-1)C1 error : Below 80AD error : Below 2b.When using check disc (TDYS-1)C1 error : Below 50 CPLAY error rate checkSpecified value:C1 error : Below 80AD error : Below 2 Unsatisfactory if displayed as T= (#) NG”NG(, # are both arbitrary numbers)Laser power check(6-2 : See page 24)Traverse check(6-3 : See page 24)Focus bias check(6-4 : See page 25)C PLAY check(6-5 : See page 25)Self-recording/playbackcheck(6-6 : See page 25)Temperaturecompensationoffset check(6-1 : See page 24)Criteria for Determination(Unsatisfactory if specified value is not satisfied) Clean the optical pick-up Adjust again Replace the optical pick-up Replace the optical pick-up Replace the optical pick-up Replace the optical pick-up Replace the optical pick-upIf always unsatisfactory: Replace the overwrite head Check for disconnection of the circuits around theoverwrite headIf occasionally unsatisfactory: Check if the overwrite head is distorted Check the mechanism around the sled Check for disconnection of the circuits aroundD101 (BD board) Check the signals around IC101, IC121, CN102,CN103 (BD board)Measure if unsatisfacto