Sony-SCDXA777ES-sacd-sm 维修电路原理图.pdf

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1、SERVICE MANUALModel Name Using Similar MechanismNEWCD Mechanism TypeCDM19JB-DVBU4BCDM19JN-DVBU4BBase Unit NameDVBU4BOptical Pick-up NameKHM-230AAASUPER AUDIO CD PLAYERUS ModelCanadian ModelAEP ModelSPECIFICATIONSSCD-XA777ESVer 1.1 2001.109-873-192-02Sony Corporation2001J0500-1Home Audio CompanyC 200

2、1.10Published by Sony Engineering Corporation(US and Canadian models)When a super audio CD is playedPlaying frequency range2 Hz to 100 kHzFrequency response2 Hz to 50 kHz ( 3 dB)Dynamic range108 dB or moreTotal harmonic distortion rate0.0012 % or lessWow and flutterValue of measurable limit (0.001 %

3、W. PEAK) or lessWhen a CD is playedFrequency response2 Hz to 20 kHzDynamic range100 dB or moreTotal harmonic distortion rate0.0017 % or lessWow and flutterValue of measurable limit (0.001 %W. PEAK) or lessOutput connector*Output only the audio signals of the CDLaser radiant power: 5.47 uW at 650 nm*

4、These output is the value measured at a distance of about 200mm from the objective lens surface on the optical pick-up.Power requirements120 V AC, 60 Hz230 V AC, 50/60 Hz (AEP model)Power consumption32 WDimensions (w/h/d)430 130 380 mm(17 5 1/8 15 in.)incl. projecting partsMass (approx.)16 kg (35 lb

5、s 5 oz.)Supplied accessoriesDesign and specifications are subject to change without notice.ANALOG OUTDIGITAL (CD)OUTOPTICAL*DIGITAL (CD)OUTCOAXIAL*PHONESJack typePhonojacksSquareopticaloutputconnectorCoaxialoutputconnectorStereophone jackOutput level2 Vrms(at 50 kilohms)18 dBm0.5 Vp-p10 mWLoad imped

6、anceOver 10 kilohmsLight emittingwave length:660 nm75 ohms32 ohms( ) Audio connecting cordphono jack 2 (Red and White) y phono jack 2 (Redand White) (3)phono jack 1 (Black) y phono jack 1 (Black) (2) Remote commander RM-SX700 (1) R06 (size-AA) batteries (2) AC power cord (Mains lead) (1)GeneralLaser

7、Semiconductor laser(SACD: 650 nm)(CD: 780 nm)Emission duration: continuousRadioFans.CN 收音机爱 好者资料库2SCD-XA777ESTABLE OF CONTENTS1.SERVICING NOTES.42.GENERAL.93.DISASSEMBLY3-1.Disassembly flow . 103-2.Case (Top) . 113-3.Loading Panel Assy. 113-4.Front Panel Section . 123-5.MAIN Board, Bracket (MAIN) .

8、123-6.Mechanism Deck (CDM19JB-DVBU4B/CDM19JN-DVBU4B), RF Board. 133-7.Disc Table, Belt, Loading Motor (M1). 133-8.Optical Pick-up (KHM-230AAA/J1NP) . 143-9.Base Unit (DVBU4B) . 154.TEST MODE. 165.DIAGRAMS5-1.Block Diagram RF/SERVO Section . 315-2.Block Diagram MAIN Section (1/2) . 325-3.Block Diagra

9、m MAIN Section (2/2) . 335-4.Block Diagram AUDIO Section (1/2) . 345-5.Block Diagram AUDIO Section (2/2) . 355-6.Block Diagram DISPLAY/POWER SUPPLY Section . 365-7.Note for Printed Wiring Boards andSchematic Diagrams . 375-8.Printed Wiring Boards LOADING MOTOR/RF/SWITCH Boards . 385-9.Schematic Diag

10、ram LOADING MOTOR/RF/SWITCH Boards . 395-10. Printed Wiring Board MAIN Board (Component Side) . 405-11. Printed Wiring Board MAIN Board (Conductor Side) . 415-12. Schematic Diagram MAIN Board (1/5) . 425-13. Schematic Diagram MAIN Board (2/5) . 435-14. Schematic Diagram MAIN Board (3/5) . 445-15. Sc

11、hematic Diagram MAIN Board (4/5) . 455-16. Schematic Diagram MAIN Board (5/5) . 465-17. Printed Wiring Board D.OUT Board . 475-18. Schematic Diagram D.OUT Board . 475-19. Printed Wiring Board MOTHER Board (Component Side) . 485-20. Printed Wiring Board MOTHER Board (Conductor Side) . 495-21. Schemat

12、ic Diagram MOTHER Board (1/2) . 505-22. Schematic Diagram MOTHER Board (2/2) . 515-23. Printed Wiring Board AUDIO FRONT Board . 525-24. Schematic Diagram AUDIO FRONT Board . 535-25. Printed Wiring Board AUDIO SURR Board . 545-26. Schematic Diagram AUDIO SURR Board . 555-27. Printed Wiring Board AUDI

13、O C/SW Board . 565-28. Schematic Diagram AUDIO C/SW Board . 575-29. Printed Wiring Board PANEL Board . 585-30. Schematic Diagram PANEL Board . 595-31. Printed Wiring Boards HP/JOG/KEY/R.CNTL Boards . 605-32. Schematic Diagram HP/JOG/KEY/R.CNTL Boards . 615-33. Printed Wiring Board A-POWER Board . 62

14、5-34. Schematic Diagram A-POWER Board . 635-35. Printed Wiring Board D-POWER Board . 645-36. Schematic Diagram D-POWER Board . 655-37. Printed Wiring Boards AC/AC SW Boards . 665-38. Schematic Diagram AC/AC SW Boards . 675-39. IC Pin Function Description . 766.EXPLODED VIEWS6-1.Case Section . 916-2.

15、Front Panel Section . 926-3.Bottom Section. 936-4.Board Section-1. 946-5.Board Section-2. 956-6.Chassis Section . 966-7.Mechanism Deck Section(CDM19JB-DVBU4B, CDM19JN-DVBU4B) . 976-8.Base Unit Section (DVBU4B) . 987.ELECTRICAL PARTS LIST. 99ATTENTION AU COMPOSANT AYANT RAPPORT LA SCURIT!LES COMPOSAN

16、TS IDENTIFIS PAR UNE MARQUE 0SUR 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!COMPONE

17、NTS IDENTIFIED BY MARK 0 OR DOTTEDLINE WITH MARK 0 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.RadioFans.CN 收音机爱 好者资料库3SCD-XA777ESNotes on c

18、hip component replacement Never reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may be dam-aged by heat.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 cond

19、uctor of thecircuit board (within 3 times). Be careful not to apply force on the conductor when solderingor unsoldering.CAUTIONUse of controls or adjustments or performance of proceduresother than those specified herein may result in hazardous ra-diation exposure.This appliance is classified as a CL

20、ASS 1LASER product.The CLASS 1 LASER PRODUCTMARKING is located on the rear exterior.The following caution label is locatedinside the unit.SAFETY CHECK-OUTAfter correcting the original service problem, perform the follow-ing safety check before releasing the set to the customer:Check the antenna term

21、inals, 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

22、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

23、 suitable for this job.3.Measuring the voltage drop across a resistor by means of a VOMor battery-operated AC voltmeter. The “limit” indication is 0.75V, so analog meters must have an accurate low-voltage scale.The Simpson 250 and Sanwa SH-63Trd are examples of a pas-sive VOM that is suitable. Nearl

24、y all battery operated digitalmultimeters that have a 2 V AC range are suitable. (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 GroundThis label is located on the left exterior.US and Canadian modelsAEP model4SCD-XA777ESSE

25、CTION 1SERVICING NOTESThe 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 procedur

26、e 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-

27、up block. Therefore, when checking the laser diode emis-sion, observe from more than 30 cm away from the objective lens.CLEANING OF OPTICAL PICK-UP LENSIn cleaning the lens of optical pick-up, use the air blower.Never use a cotton swab for cleaning the lens of optical pick-up,which otherwise causes

28、a trouble.RESETTING OPERATION AT POWER ONIf the power is turned on with a disc loaded in the set, a sequenceof operation as shown below will be performed.(The operation varies depending on the type of disc)Condition: continue mode(1) CD 1.Sled reverse move (sled in) 2.Disc detect 3.IC setting for CD

29、 4.Servo error signal offset auto adjustment 5.Spindle kick for LD on 6.LD on 7.Focus search 8.Focus servo on 9.Spindle kick 10. Spindle servo on 11. E-F balance auto adjustment 12. Tracking & sled servo on 13. Focus bias auto adjustment 14. Focus servo gain auto adjustment 15. Tracking servo gain a

30、uto adjustment 16. Jump to lead-in area 17. Read TOC 18. StopNOTES ON HANDLING THE OPTICAL PICK-UPBLOCK OR BASE UNIT(2) SACD (single layer) 1.Sled reverse move (sled in) 2.Disc detect 3.IC setting for SACD 4.Servo error signal offset auto adjustment 5.Spindle kick for LD on 6.LD on 7.Focus search 8.

31、Focus servo on 9.Spindle kick 10. Spindle servo on 11. E-F balance auto adjustment 12. Tracking & sled servo on 13. Focus bias auto adjustment 14. Focus servo gain auto adjustment 15. Tracking servo gain auto adjustment 16. Jump to lead-in area 17. Read TOC 18. Stop(3) SACD (dual layer) 1.Sled rever

32、se move (sled in) 2.Disc detect 3.IC setting for SACD 4.Servo error signal offset auto adjustment 5.Spindle kick for LD on 6.LD on 7.Focus search 8.Focus servo on (layer 0) 9.Spindle kick 10. Spindle servo on 11. E-F balance auto adjustment (layer 0) 12. Tracking & sled servo on (layer 0) 13. Focus

33、bias auto adjustment (layer 0) 14. Focus servo gain auto adjustment (layer 0) 15. Tracking servo gain auto adjustment (layer 0) 16. Jump to lead-in area 17. Read TOC 18. Focus jump (layer 0tlayer 1) 19. E-F balance auto adjustment (layer 1) 20. Tracking & sled servo on (layer 1) 21. Focus bias auto

34、adjustment (layer 1) 22. Focus servo gain auto adjustment (layer 1) 23. Tracking servo gain auto adjustment (layer 1) 24. Focus Jump (layer 1tlayer 0) 25. StopPart No.MODEL IDENTIFICATION Back Panel ModelPart No.US and Canadian4-235-601-1AEP4-235-601-25SCD-XA777ESHOW TO OPEN THE DISC TABLE WHEN POWE

35、R SWITCH TURNS OFFOPTICAL PICK-UP SERVICE POSITIONPlace the insulator on the MAIN board, then install the base unit (DVBU4B) on it as shown in the figure.disc tableloading panel assytapering drivercover (CAM)2Draw out the loading panel assyin the direction of arrow B.1Insert a tapering driver in the

36、 holeat the bottom of the unit,turn the cover (CAM) fully in thedirection of arrow A.BAbase unit(DVBU4B)MAIN boardinsulator6SCD-XA777ESNote: Follow the disassembly procedure in the numerical order given.D-POWER/POWER BOARDS AND RF BOARD SERVICE POSITION1Remove the case.2Turn over the set.4two bottom

37、 plates3four screws (3 8)3eight screws (3 8)D-POWER boardPOWER boardINSTALLATION TWO WIRES (FLAT TYPE) (25/35 CORE)Note: When the wire (flat type) (35 core) is disconnected from the RF board, then it is again connected, disconnect the wire (flat type) (25 core) once, and reconnect the wire (flat typ

38、e) (35 core) first.wire (flat type) (35 core)wire (flat type) (25 core)RF board BOTTOM VIEW 7SCD-XA777ESMAIN BOARD SERVICE POSITIONIn checking the MAIN board, prepare jig (extension cable J-2501-205-A: 1.50 mm Pitch, 7 cores, Length 300 mm/J-2501-086-A: 1.00 mm Pitch, 19 cores, Length 300 mm).Note:

39、Be sure to ground the MAIN board with a lead wire when checking it.lead wireMAIN boardMOTHER boardconnect jig (extension cableJ-2501-086-A) to the MAINboard (CN901/902) and MOTHER board (CN301/302).connect jig (extension cableJ-2501-205-A) to the MAINboard (CN903) and PANEL board (CN1002).AUDIO MODU

40、LE BLOCK SERVICE POSITIONaudio module block8SCD-XA777ESNOTE FOR INSTALLATION (AUDIO MODULE BLOCK)Note: When installing the audio module block, insert the audio module block as shown below.audio module blockNOTE ON POSITION OF WIRE (FLAT TYPE)MAIN boardwire (flat type)heatsinkA-POWER boardHeatsink ge

41、ts heated up to a high temperature.Be careful to keep the position of wire (flat type).B FRONT9SCD-XA777ESSECTION 2GENERALThis section is extracted frominstruction manual.Rear Panel Parts Descriptions1 ANALOG 5.1CH OUT jacks (5)Connect to an amplifier equipped with the 5.1CHinput jacks (Multi-channe

42、l amplifier, AV amplifier,etc.) using the audio connecting cords.2 DIGITAL (CD) OUT COAXIAL connector (7)Connect to an audio component using the coaxialdigital cable.3 DIGITAL (CD) OUT OPTICAL connector (7)Connect to an audio component using an opticaldigital cable.4 AC IN terminal (7)Connect the AC

43、 power cord.5 ANALOG 2CH OUT L/R jacks (6)Connect to an audio component (stereo/2 channel)using the audio connecting cord.NoteOnly the audio signals of the CD can be output from theDIGITAL (CD) OUT connectors shown in 2 and 3 Those of theSuper Audio CD cannot be output through DIGITAL (CD) OUTANALOG

44、LRRRL5 CH OUT2CH OUTOUTOPT CALCOAX ALCEN ERFRONTSURROUNDSUB WOO ERDIGITAL(CD)AC NRemote Parts DescriptionsCONTINUE SHUFFLEPLAY MODEPROGRAMSACD/CD123456780 09TIME/TEXTREPEATAMSBACLEAR10ENTERMODED SPLAY/MULTI 2CHNDEXLEVELADJCHECK1 CONTINUE button (20)Press to resume normal play from Shuffle Play orPro

45、gramme Play.SHUFFLE button (20)Press to select Shuffle Play.PROGRAM button (21)Press to select Programme Play.2 DISPLAY MODE button (16)Press to turn off the information.3 TIME/TEXT button (15)Each time you press the button, the playing time of thetrack, the total remaining time on the disc, or TEXT

46、information appears in the display.4 Number buttons (18)Press to enter the track numbers.5i10 button (18)Press to locate a track numbered over 10.6 REPEAT button (19)Press repeatedly to play all tracks or only one track onthe disc.7 AyB button (20)Press to select Repeat A-B Play.8 H button (14)Press

47、 to start play.X button (14)Press to pause play.x button (14)Press to stop play.9 AMS ./ (AMS: Automatic Music Sensor)buttons (18)Press to locate a specific track.0 m/M buttons (18)Press to locate a portion you want to play within atrack.qa INDEX /. buttons (18)Press to locate a specific point marke

48、d with an indexsignal when you play a disc that has index signals.qs SACD/CD button (14)Each time you press the button, ”SACD“ or ”CD“appears in the display. Select the type of CD you wantto play.qd MULTI/2CH button (14)Press to select the playback area when the 2 channel +Multi-channel Super Audio

49、CD (page 13) is loaded.qf ENTER button (25)Press to decide the selection.qg CLEAR button (21)Press to delete a programmed track number.qh LEVEL ADJ button (25)Press to adjust the output level balance for the Multi-channel management function (page 23).qj CHECK button (21)Press to check the programme

50、d order.7 TIME/TEXT button (15)Each time you press the button, the playing time of thetrack, the total remaining time on the disc, or TEXTinformation appears in the display8 MENU (13)Press to enter the menu9 MULTI/2CH button (with an LED) (14)Each time you press the button while the 2 channel +Multi