Sony-MDX65-md-sm 维修电路原理图.pdf

1 MICROFILMModel Name Using Similar MechanismMDX-62Mini Disc Mechanism TypeMG-798K-133Optical Pick-up NameKMS-241A/J2NSERVICE MANUALUS ModelCanadian ModelAEP ModelUK ModelE ModelMDX-65MINIDISC CHANGERSystemMini disc digital audio systemLaser Diode PropertiesMaterial: GaAlAsWavelength: 780 nmEmission Duration: ContinuousLaser output Power: Less than44.6 W* This output is the value measured at a distance of200 mm from the objective lens surface on theOptical Pick-up Block.Frequency response10 20,000 HzWow and flutter Below measurable limitSignal-to-noise ratio95 dBOutputsBus control output (8 PIN)Analog audio output (RCA PIN)Current drain300 mA (MD playback)600 mA (during loading or ejecting adisc)DimensionsApprox. 176 83.5 142 mm(7 3 3/8 5 18/32 in.) (w/h/d) not incl.projecting parts and controlsMassApprox. 1.1 kg (2 lb. 7 oz.)Power requirement12 V DC car battery (negativeground)Supplied accessoriesMounting hardware (1 set)Bus cable 5.5 m (1)RCA pin cord 5.5 m (1) U.S. and foreign patents licensed from DolbyLaboratories Licensing Corporation. Design and specifications subject to change withoutnotice.SPECIFICATIONS Sony BUS system compatible with mobile MDchangers. Direct-in system for inserting and removingMDs easily. No waiting time to change discs in continuousplay. The MD changer compartment has a built in lightfor easy use even in the dark. 1 bit Digital/Analog converter for high qualitysound reproduction.FEATURESDolby noise reduction extension manufactured under licensefrom Dolby Laboratories Licensing Corporation.“DOLBY” and the double-D symbol a are trademarks of DolbyLaboratories Licensing Corporation.RadioFans.CN 收音机爱 好者资料库 2 TABLE OF CONTENTS1. SERVICE NOTE1-1. To Place the Set into Playback Mode. 31-2. How to Check the Servo Board Waveforms . 32. GENERALPreparations . 4Listening MDs . 4Connections . 53. DISASSEMBLY3-1. Panel (Rear) Assy. 63-2. Case (Upper) . 63-3. Panel (Front) Assy. 73-4. MD Block. 73-5. Main Board . 83-6. Chassis (OP) Block . 83-7. Servo Board. 93-8. Optical Pick-up . 93-9. Note on Assembly for the Chassis (OP) Block . 104. DIAGRAMS4-1. IC Pin Descriptions . 114-2. Circuit Boards Location . 144-3. Block Diagram . 154-4. Printed Wiring Boards Servo Section . 174-5. Schematic Diagram Servo Section. 214-6. Schematic Diagram Main Section. 234-7. Printed Wiring Boards Main Section . 264-8. Printed Wiring Board Power Section . 294-9. Schematic Diagram Power Section . 315. EXPLODED VIEWS5-1. Case Section . 385-2. Main Board Section . 395-3. MD Section (1). 405-4. MD Section (2). 415-5. MD Section (3). 426. ELECTRICAL PARTS LIST. 43SERVICE NOTECAUTIONUse of controls or adjustments or performance of proce-dures other than those specified herein may result in haz-ardous radiation exposure.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.NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK ORBASE UNITThe laser diode in the optical pick-up block may suffer electrostaticbreakdown because of the potential difference generated by thecharged electrostatic load, etc. on clothing and the human body.During repair, pay attention to electrostatic breakdown and also usethe procedure in the printed matter which is included in the repairparts.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 focused onthe disc reflective surface by the objective lens in the optical pick-upblock. Therefore, when checking the laser diode emission, observefrom more than 30 cm away from the objective lens.NOTES ON PICK-UP FLEXIBLE BOARDThe pick-up flexible board in this set is secured to the optical pick-upwith an adhesive tape. Once the tape is removed, an adhering forcebecomes weak, and it cannot be reused.Therefore, if the optical pick-up is replaced, replace also the pick-upflexible board with a new one.NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK(KMS-241A/J2N)The laser diode in the optical pick-up block may suffer electrostaticbreak-down easily. When handling it, perform soldering bridge tothe laser-tap on the flexible board. Also perform measures againstelectrostatic break-down sufficiently before the operation. Theflexible board is easily damaged and should be handled with care.laser-tapSAFETY-RELATED COMPONENT WARNING!COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINEWITH MARK ! ON THE SCHEMATIC DIAGRAMS AND INTHE PARTS LIST ARE CRITICAL TO SAFE OPERATION.REPLACE THESE COMPONENTS WITH SONY PARTS WHOSEPART NUMBERS APPEAR AS SHOWN IN THIS MANUAL ORIN SUPPLEMENTS PUBLISHED BY SONY.OPTICAL PICK-UP FLEXIBLE BOARDATTENTION AU COMPOSANT AYANT RAPPORT LA SCURIT!LES COMPOSANTS IDENTIFIS PAR UNE MARQUE ! SUR LESDIAGRAMMES SCHMATIQUES ET LA LISTE DES PICES SONTCRITIQUES POUR LA SCURIT DE FONCTIONNEMENT. NEREMPLACER CES COMPOSANTS QUE PAR DES PICES SONYDONT LES NUMROS SONT DONNS DANS CE MANUEL OUDANS LES SUPPLMENTS PUBLIS PAR SONY.RadioFans.CN 收音机爱 好者资料库 3 BP1BP2MDX-65Master unit(CDX-C880, C880R, etc.)BUS CONTROL INBUS CONTROL OUTSECTION 1SERVICE NOTE1-1. TO PLACE THE SET INTO PLAYBACK MODEThe this set has no key control function and cannot be placed intothe Playback mode alone.For key control, the this set is controlled through serialcommunication with a master unit (car audio player, TV tuner orsource selector compatible with the Sony BUS system.)To service the this set, the set should be connected as given below:1-2. HOW TO CHECK THE SERVO BOARD WAVEFORMS1. Remove the panel (rear) assy, case (upper) and panel (front) assy.Then, remove the main board from the mechanism deck. (Seepage 8 of “SECTION 3. DISASSEMBLY”.)2. Remove the chassis (OP) block from the mechanism deck. (Seepage 10 of “SECTION 3. DISASSEMBLY”.)3. Short each bridge points BP1 and BP2 on the main board bysolder bridge. main board (conductor side) 4. Connect the power board with the main board by the mainflexible board. Connect the main board with the servo board bythe servo flexible board.5. Connect to a master unit. With the master unit OFF, press thepreset buttons 4 n 5 n 1 (2 seconds or more each) in thisturn to enter the TEST mode.6. Open the doors and insert a disc in the chassis (OP) assy. Usethe SOURCE button on the master unit to select to MD toplayback.7. Check the waveforms at each point on the servo board.Note: After this check is completed, remove solder betweenshorted bridge points BP1 and BP2 and open these points. 4 SECTION 2GENERALThis section extracted from US,Canadian, E models instruction manual. 5 6 1 BVTT 2.6x63 case (upper)2 BVTT 2.6x62 PTT 2.6x84 BVTT 2.6x63 BVTT 2.6x66 panel (rear) assy5 CN9011 coverSECTION 3DISASSEMBLYNote : Follow the disassembly procedure in the numerical order given.3-1. PANEL (REAR) ASSY3-2. CASE (UPPER) 7 1 damper (798)2 damper (798)3 tension spring (FL)4 tension spring (FL)5 tension spring (FL)6 MD block1 claw2 claw3 panel (front) assy4 CN6203-3. PANEL (FRONT) ASSY3-4. MD BLOCK 8 4 bearing (ELV)7 bearing (ELV)9 worm wheel (ELV2)6 chassis (OP) block3 chassis (bottom) assy1 precision screws (P 1.7x1.8)2 precision screws (P 1.7x1.8)5 bearing (ELV)8 bearing (ELV)1 cushion3 escutcheon6 chassis (front)7 collar (EHS)5 lead stopper! CN700! CN701! CN603! CN6010 CN600! CN5009 CN602! MAIN board! cushion (MAIN)8 sheet (MAIN PC board)2 screws (M1.7)! special flat screws (1.7x3)4 screws (M1.7)3-5. MAIN BOARD3-6. CHASSIS (OP) BLOCK 9 1 screws (K1.7x3.5)2 optical pick-up1 CN2006 CN1005 CN3004 CN4003 screws (M1.7x2.2)7 SERVO board2 Unsolder the motor lead wires.3-7. SERVO BOARD3-8. OPTICAL PICK-UP 10 ABBBAA2 Turn the three feed screw (ELV) assy fully in the direction of arrows A.!Turn the three gear (ELVB) fully in the direction of arrows B.6 bearing (ELV)7 bearing (ELV)0 precision screws (P1.7x1.8)9 precision screw (P1.7x1.8)8 chassis (bottom) assy5 chassis (OP) block3 bearing (ELV)4 bearing (ELV)1 worm wheel (ELV2)! gear (ELVC)! gear (ELVA2)! polyethylene washer! polyethylene washer3-9. NOTE ON ASSEMBLY FOR THE CHASSIS (OP) BLOCK 11 4-1. IC PIN DESCRIPTIONS IC100 CXA2523AR (RF AMP)Pin No.Pin NameI/OPin Description1III-V converted RF signal input (I) from detector of optical pick-up.2JII-V converted RF signal input (J) from detector of optical pick-up.3VCOCenter voltage (+1.65 V) generation output4 9A FISignal input (A to F) from detector of optical pick-up.10PDIQuantity monitor input of light from laser diode of optical pick-up.11APCOLaser amplifier output to automatic power control circuit.12APCREFIReference voltage input for laser power setting.13GNDGND14TEMPIITemperature sensor connecting pin (Not used in this set.)15TEMPROReference voltage output for temperature sensor. (Not used in this set.)16SWDTIWrite data signal input from System controller (IC600).17SCLKISerial clock signal input from System controller (IC600).18XLATISerial latch signal input from System controller (IC600).19XSTBYIStandby signal input (“L” : Standby) (Fixed at “H” in this set.)20FOCNTICenter frequency control voltage input of internal circuit filter (BPF22, BPF3T and EQ).21VREFOReference voltage output (Not used in this set.)22EQADJICenter frequency setting input of internal circuit filter (EQ).233TADJICenter frequency setting input of internal circuit filter (BPF3T).24VCCPower supply pin (+3.3 V)25WBLADJICenter frequency setting input of internal circuit filter (BPF22).26TEOTracking error signal output to CXD2652AR (IC200).27CSLEDIConnecting pin for low pass filter condenser of sled error signal.28SEOSled error signal output to CXD2652AR (IC200).29ADFMOFM signal output of ADIP.30ADINIFM signal input of ADIP by AC combination.31ADAGCIExternal condenser connecting pin for AGC of ADIP.32ADFGOADIP double FM signal output (22.05 kHz 1 kHz) to CXD2652AR (IC200).33AUXOSupport signal (I3 signal/temperature signal) output (Not used in this set.)34FEOFocus error signal output to CXD2652AR (IC200).35ABCDOQuantity signal output of light to CXD2652AR (IC200).36BOTMOBottom hold signal output of quantity signal (RF/ABCD) of light to CXD2652AR (IC200).37PEAKOPeak hold signal output of quantity signal (RF/ABCD) of light to CXD2652AR (IC200).38RFOPlayback EFM RF signal output to CXD2652AR (IC200).39RFAGCIExternal condenser connecting pin of AGC circuit for RF.40AGCIIRF signal input by AC combination.41COMPOOUser comparator output pin (Not used in this set.)42COMPPIUser comparator input pin (Fixed at “L” in this set.)43ADDCIExternal condenser connecting pin for low frequency interception of ADIP amplifier.44OPOOExternal condenser connect pin for lower cut of ADIP amplifier.45OPNIUser operational amplifier inversion input pin (Fixed at “L” in this set.)46RFOORF signal output47MORFIIRF signal input of MO by AC combination.48MORFOORF signal output of MO.SECTION 4DIAGRAMS 12 IC600 PD784216GC-027-8EU (SYSTEM CONTROLLER)Pin No.Pin NameI/OPin Description1M1OElevator motor (M904) drive signal output2M1OElevator motor (M904) drive signal output3M2OLoading motor (M903) drive signal output4M2OLoading motor (M903) drive signal output5MDMONOMechanism deck system power control output (“H” : Power ON)6LESILoading end sensor detection switch (S902) input7SESIStore end sensor detection switch (S903) input8HOMEIHome position detection switch (S901) input (“L” : Home position)9VDDPower supply pin (+5 V)10X2Main system clock connecting pin (14 MHz)11X1Main system clock connecting pin (14 MHz)12VSSGND13XT2Sub system clock connecting pin (32.768 kHz)14XT1Sub system clock connecting pin (32.768 kHz)15RESETSystem reset input16BU INIBackup OFF detection input (“L” : Backup OFF)17BUS ONIBUS OFF detection of SONY BUS. (“H” : BUS OFF)18SQ SYISub code Q sync input from CXD2652AR (IC200).19STR SWISTOP switch (S600) input20ONot used.21CC XINTIInterruption status input from CXD2652AR (IC200).22ONot used.23AVDDPower supply for A/D converter. (+5 V)24AVREF0Reference voltage for A/D converter.25INITIInitial input pin at reset.26TEMPIThermistor connecting pin for temperature detection.27EHSIElevator height position detection input28, 29IConnect to GND.30 32OConnect to GND.33AVSSAnalog GND34ERR PWMOError data output (Not used in this set.)35ONot used.36AVREF1Reference voltage for D/A converter.37, 38ONot used.39Not used.40MD SIIRead data signal input from CXD2652AR (IC200).41MD SOOWrite data signal output to CXA2523AR (IC100) and CXD2652AR (IC200).42MD CKOOSerial clock signal output to CXA2523AR (IC100) and CXD2652AR (IC200).43ONot used.44Not used.45UNISIISerial data input for SONY BUS.46UNISOOSerial data output for SONY BUS.47UNI CKIISerial clock input for SONY BUS.48LINKOFFOLink control signal output for SONY BUS. (“H” : Link OFF)49ONot used.50INot used.51, 52D-BASS1, 2ODigital D-BASS select output 1, 2 (Not used in this set.)53 55ONot used.56 59MNT0 3OMonitor 0 3 signal input from CXD2652AR (IC200).60AGINGONot used.61AGCHKONot used.62TFTONONot used. 13 Pin No.Pin NameI/OPin Description63ONot used.64EE CSOChip select output to EEPROM. (Not used in this set.)65EE CKOOSerial clock output to EEPROM. (Not used in this set.)66EE SIOI/OData input from/output to EEPROM. (Not used in this set.)67SENSIInternal status input from CXD2652AR (IC200).68LIMIT SWIOptical pick-up innermost track limit position detection switch (S400) input69DOORSWIFront door open detection switch (S620) input (“L” : Open complete)70MD LATOSerial latch signal output to CXA2523AR (IC100) and CXD2652AR (IC200).71MD RSTOReset signal output to CXD2652AR (IC200).72VSSGND73MD ONOServo system power control output (“H” : Power ON)74EMPH OODe-emphasis circuit control output (“H” : De-emphasis ON)75A ATTIAnalog mute control input (“H” : Mute ON)76ILLONOIllumination lamp (PL620) light-up control output (“H” : Lamp light-up)77TSTSMDISingle mode setting pin (“L” : Single mode)78TSTCKOOSerial clock output to LED for TEST mode display. (Not used in this set.)79TSTSOOSerial data output to LED for TEST mode display. (Not used in this set.)80TSTMODITEST mode setting pin (“L” : TEST mode)81VDDPower supply pin (+5 V)82 85TSTOUT0 3OTEST key output pin of 4 8 matrix. (Not used in this set.)86 93TSTIN0 7ITEST key input pin of 4 8 matrix. (Not used in this set.)94TEST/VPPFixed at “L” in this set.95DCS1IDisc with/without detection 1 switch (S611) input (“H” : with disc)96DCS2IDisc with/without detection 2 switch (S612) input (“H” : with disc)97DCS3IDisc with/without detection 3 switch (S613) input (“H” : with disc)98DCS4IDisc with/without detection 4 switch (S614) input (“H” : with disc)99DCS5IDisc with/without detection 5 switch (S615) input (“H” : with disc)100DCS6IDisc with/without detection 6 switch (S616) input (“H” : with disc) 14 SENSOR boardPOWER boardSERVO boardLAMP boardMAIN board4-2. CIRCUIT BOARDS LOCATION 15 16 4-3. BLOCK DIAGRAMMDX-65+9VDCS6DCS111FOCUS8DRIVERCONTROL56IC300SLED/SPINDLE MOTOR DRIVE,FOCUS/TRACKING COIL DRIVE26TRACKING29DRIVERCONTROL323124M902(SLED)0422DRIVERCONTROL1920M15 M901(SPINDLE)13DRIVERCONTROL1718M746911 APC10 PDLDAUTOMATICPOWER CON