Nakamichi-DVD15-dvd-sm 维修电路原理图.pdf

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1、1DVD-155 Disc MusicBank DVD ChangerService ManualRCONTENTS1. GENERAL . 22. REMOVAL PROCEDURES. 43. ELECTRICAL ADJUSTMENT . 93-1 Measurement instruments and jigs . 93-2 Parts location for adjustment. 93-3 Adjustment Procedure. 103-4 RAM Clear. 114. MECHANICAL ASSY AND PARTS LIST . 124-1 Synthesis Ass

2、y . 124-2 Mechanism Assy DVD-15 (A01) . 144-3 Motor Chassis EX Assy (B01) . 164-4 Loading EX Assy ADJ-3 (B02) . 174-5 DVD Traverse Assy ADJ-3 (B03) . 194-6 Pakage Assy and Accessory Assy . 205. ELECTRICAL PARTS LIST . 216. RECOMMENDED SPARE PARTS LIST . 267. IC BLOCK DIAGRAMS. 278. SPECIFICATIONS. 4

3、9For Schematic Diagrams, and Mounting Diagrams, see the separate volume.RadioFans.CN 收音机爱 好者资料库21. GENERAL1.1 Product CodeV6851.2 DestinationsBS, CAN, CH, DA, EP, HK, JPN, OTR, TW, USA,KR, AUSAbbreviationsCAN - CanadaCH - ChinaDA - South AmericaEP - EuropeHK - Hong KongJPN - JapanOTR - OtherTW - Tai

4、wanU.K. - United KingdomUSA - U.S.A.KR - KoreaAUS - Australia1.3 Cautions / Warnings(1) Product Safety NoticeParts marked with the symbol in the schematic dia-gram have critical characteristics.Use ONLY replacement parts recommended by themanufacturer. It is recommended that the unit be oper-ated fr

5、om a suitable DC supply or batteries during initialcheck-out procedures.(2) Leakage Current Check / Resistance CheckBefore returning the unit to the customer, make sureyou make either (1) a leakage current check or (2) a lineto chassis resistance check. If the leakage current ex-ceeds 0.5 milliamp,

6、or if the resistance from chassis toeither side of the power cord is less than 240 k ohms,the unit is defective.WARNINGDO NOT return the unit to the customeruntil the problem is located and corrected.(3) Protection of Eyes from Laser BeamTo protect eyes from invisible laser beam during servic-ing, D

7、O NOT LOOK AT THE LASER BEAM on theChanger.(4) Laser CautionCAUTIONAdjusting the knobs, switches, and controls etc. or tak-ing actions not specified herein may result in a harmfulemission of laser beams. This Changer must be adjustedand repaired only by qualified service personnel.OBSERVERA!Sdana in

8、stllningar av rattarna, omkopplarna ellervriga kontrollknappar som inte r beskriva ibruksanvisningen kan resultera i farlig laserutstrlning.Justering eller reparation av denna kompaktskivspelareskall endast utfras av kvalificerad servicepersonal.OBS!Indstilling af knapper, cmskiftere og vrigekontrol

9、knapper, som ikke flger den i brugsanvisningenbeskrevne mde, kan resultere i farlig laserudstrling.Justering eller reparation af denno CD-afspiller m kunudfres af kvalificeret servicepersonale.OBS!Justering av ratt, brytere og kontroller andre enn de somer beskrevet her, kan resultere i farlig laser

10、bestrling.Justering eller reparasjon av denne kompaktdiskspillerenma bare utfres av kvalifiserte fagfolk.HUOMAUTUSJos nuppeja, kyikimi ja stimi ym, sdetn tailaitetta kytetn toisella tavalla kuin on selostettu,tuloksena saattaa olla vaarallista lasersteiden vuotoa.CD-soittimen st ja korjaus on jtettv

11、 ainaasiantuntevan huoltoteknikon tehtvksiCLASS 1 LASER PRODUCTKLASSE 1 LASER PRODUKTLUOKAN 1 LASER LAITEKLASS 1 LASER APPARATCAUTION ;INVISIBLE LASER RADIATION WHEN OPENVARNING ;OSYNLIG LASERSTRALNING NAR DENNAAND INTERLOCKS DEFEATED. AVOID EXPOSURE TO BEAM.DEL AR OPPNAD OCH SPARREN AR URKOPPLAD.AD

12、VARSEL ;USYNLIG LASERSTRALING VED ABNING,VARO ;AVATTAESSA JA SUOJALUKITUS OHITETTAESSA NAR SIKKERHEDSAFBRYDERE ER UDE AF FUNKTIONALA KATSO SATEESEEN !BETRAKTA EJ STRALEN !UNDGA UDSTTELSE FOR STRALING.OLET ALTTIINA NAKYMATTOMALLE LASERSATEILYLLE.THIS DVD PLAYER IS CLASSIFIED AS A CLASS 1 LASERPRODUCT

13、. THE CLASS 1 LASER PRODUCT LABEL IS LO-CATED ON THE REAR EXTERIOR.RadioFans.CN 收音机爱 好者资料库3 How to prevent or discharge the impressed elec-tricityPlease refer to the following items.1) GroundingWhen you repair a laser pickup, first ground the humanbody, as well as the measuring instruments and other

14、tools (with particular caution to the soldering iron). Whatsmore, your workbench and floor should desirably begrounded using a conductive sheet or copper plate. Becareful so as not to let your clothes touch the laser pickup,as static electricity on the clothes may be released evenif your body is gro

15、unded.2) Discharge of electricityBe sure to discharge electricity from objects brought intocontact with the laser pickup (i.e., soldering iron, twee-zers, probes, volt-ohm-meter probes, etc.) before start-ing work by contacting them with the DVD players chas-sis. Also, never touch the laser pickup w

16、hile power isapplied.3) Soldering ironThe soldering iron for use in repair work should be: (1) aceramic soldering iron, (2) a soldering iron with its metalpart grounded, or (3) a soldering iron whose insulationresistance after power application is 10 M-ohm or moreat 500 VDC. Soldering should be comp

17、leted promptly,at a soldering iron temperature of 320C ideally. (39W).A soldering iron heated above this temperature can breakdown the laser diode.GENERAL1.4 Caution for handling Laser Pickup of DVD PlayerElectric Influence because of impressed electricityLaser pickup of a DVD player is weaker and m

18、ore sen-sitive than that of CD player, it is possible to damagethe pickup under specific electrical environments, suchas impressed or leaked electricity, including static elec-tricity. Electricity that is impressed during modificationfor zone coding, or through updating the micro proces-sor and so f

19、orth, may influence the laser pickup.Prevention of Impressed Electricity In generalIt is very difficult to specify why and how static electric-ity is impressed. It is important to thoroughly groundthe working bench and fasten the antistatic electricitywrist band, as well as carry out the daily manag

20、ementof isolating the resistor of the soldering iron and theleaked current in the working room.Unfortunately, it is impossible for us, even as the sup-plier, to assure that all these conditions are met at anydistributor or subsidiary that does not have an identicalsituation to that of the manufactur

21、ing site. Consequently,we do not recommend any modification for zone cod-ing, that can be a negative factor against quality assur-ance, and we consider pickup failure of any unit modi-fied for zone coding to be out of warranty.Note: A precise digital tester is needed to measure the leaked current.Co

22、ndition of Soldering lronType Output WattageTip Temperature Isolated Resistance Leaked CurrentFor IC or LSl13-18W30040C100M1.0AFor Elec. Part23-30W36040C50M2.0A42. REMOVAL PROCEDURES Location of Major Parts2.1 Top Cover (Refer to Fig. 2-2)1) Remove the 8 screws and detach the Top Cover from themain

23、body.Fig. 2-2Fig. 2-1 Top View(The Mechanism P.C.B. Assy is constructed on the DVD Mechanism Block.)P-Supply P.C.B. AssyMechanism BLK AssyDigital P.C.B. AssyOutput P.C.B. AssyDVD Main P.C.B. Assy(Bottom side of Mechanism BLK)LED P.C.B. AssyH.P P.C.B. Assy Power-SW P.C.B. AssyM-Trance P.C.B. AssyFron

24、t P.C.B. AssyREG 5V P.C.B. AssyDiode P.C.B. AssyREG 3V P.C.B. Assy52.2 Front Panel (Refer to Fig. 2-3)1) Remove the 5 screws on the front panel.2) Remove the screws holding the H.P P.C.B. Assy. The screwscan be reached by going through the hole in the left sidePower-SW P.C.B. Assy.3) Disconnect the

25、P702 on the P-Supply P.C.B. Assy anddisconnect the P530 and P200 on the Digital P.C.B. Assy.4) Remove the front panel in front of you by pulling it outward,keeping it level as you pull.2.3 Mechanism Block (Refer to Fig. 2-4)1) Disconnect the flexible cable from the P550 and P570 onthe Digital P.C.B.

26、 Assy.2) Disconnect the P540 on the Output P.C.B. Assy.3) Remove the 4 screws and detach the machanism from themain body.2.4 DVD Main P.C.B. Assy (Refer to Fig. 2-5)1) Remove the 4 screws “1” on the DVD Main P.C.B. Assy.2) Disconnect the three connectors “a” , “b” and “c” on the DVDMain P.C.B. Assy.

27、2.5 Mechanism Assy (Refer to Fig. 2-5)1) Remove the DVD Main P.C.B. Assy.2) Remove the 8 screws 2 in the diagram, and then removethe left and right plates 3.Fig.2-3Fig.2-4Fig.2-5Digital P.C.B. AssyMechanism BlockP570P550P540112332abcDVD Main P.C.B. AssyMechanism AssyREMOVAL PROCEDURESP200P530P702Dig

28、italP.C.B. AssyP-Supply P.C.B. AssyH.P P.C.B. Assy 62.6. Bottom Cover EX Assy, Top Cover EX Assyand F Panel EX Assy (Refer to Fig. 2-7)1) Remove the 6 screws 1 (M2.6x5 + Pan (#0 Type 3) anddetach the Bottom Cover EX Assy.2) Remove the 2 screws 2 (M2.6x3 + Pan), and detach theTop Cover EX Assy and F

29、Panel EX Assy.2.7. Mechanism P.C.B. Assy (Refer to Fig. 2-7)1) Remove the Bottom Cover EX Assy, Top Cover EX Assyand F Panel EX Assy. See item 2.6.2) Shorting the laser diode shorting land of the DVD TraverseAssy:Short the laser diode shorting lands (2 places shown by thearrows) with a soldering iro

30、n before removing the Mecha-nism P.C.B. Assy.Note: Use a soldering iron whose metal part is grounded ora ceramic soldering iron.CAUTION: Do not disconnect the Flexible Cable from theconnector P200 on the Mechanism P.C.B. Assy unless thelaser shorting lands (2 places) are shorted.Shorting the Laser D

31、iode Shorting Lands of the DVD TraverseAssyNote when reassembling:Unsolder the laser diode shorting lands after reassemblingthe Mechanism P.C.B. Assy.3) Remove 1 screw 3 (M2.6x3.5 + Pan (#0 Type 3) and 1screw 4 (M2.6x8 + Pan).4) Disconnect the Mecha Flexible P.C B. Assy 5 by pullingthe edges of the

32、connector CP103 6 on the MechanismP.C.B. Assy to unlock the connector edges.5) Pull the edges of the connector CN300 7 on the Mecha-nism P.C.B. Assy to unlock the connector edges and care-fully pull out the Traverse Flexible P.C.B. Assy.6) Pull the edges of the connector CN200 8 on the Mecha-nism P.

33、C.B. Assy to unlock the connector edges and care-fully pull out the Pickup Flexible P.C.B. 9.7) Carefully disconnect the 3 connectors CPI04 10 (EX Mo-tor Assy), CN500 11 (Sled Motor Assy), and CN600 12(Inner Switch)8) Remove the Mechanism P.C.B. Assy from the MechanismAssy.2.8. Loading EX Assy (Refe

34、r to Fig. 2-7)1) Remove the Mechanism P.C.B Assy. See item 2.7.2) Remove the 6 screws 13 (ST2.6x3 + Pan (#0 Type 3), 1screw 14 (M1.7x2.5 + Pan (#0 Type 3) (Black), and 4screws 15 (M2x2 + Pan (#0 Type 3) (Black).Note when reassembling:When reassembling the Mecha Flexible P.C B. Assy 5,move it to the

35、front side.Be sure that the shutter is positioned in the center of theshutter sensor on the Mecha Flexible P.C.B. Assy, when theshutter of the Loading EX Assy is closed by hand,3) Remove the EX Loading Chassis block 16 backward whilelifting its to the right side a little.4) Remove the Loading EX Ass

36、y while lifting it.Note: Do not damage the Catch Arm Assy and the LoadingLink Assy of the Loading EX Assy.2.9. DVD Traverse Assy (Refer to Fig. 2-7)1) Remove the Loading EX Assy. See item 2.8.2) Remove the 3 screws 17 (ST2 6x3 + Pan (#0 Type 3) andremove the EX Motor Assy.3) Remove the 3 screws 18 (

37、ST2.6x3 + Pan (#0 Type 3) andremove the EX Chassis Assy.4) Remove the 4 pcs. of Damper Screw SL19, 4 pcs of andSUS Collar B 20, and 4 pcs of SUS Collar T 21, anddetach the DVD Traverse Assy.Notes:1. Pay attention so as not to damage the Door Sensor P.C B.of the Mecha Flexible P.C.B. 5.2. Assemble th

38、e Door Sensor P.C.B. so as not it is inclined.3. Be sure that the projection of the Front Door Assy can becorrectly inserted into the Door Sensor.REMOVAL PROCEDURES7Fig.2-7REMOVAL PROCEDURES2.8. Loading EX Assy2.6. Bottom Cover EX Assy2.6. Panel EX Assy2.9. DVD Traverse Assy2.7. Mechanism P.C.B. Ass

39、y2.6. Top Cover EX Assy82.10 Pickup (Refer to Fig.2-8)Caution: Do not remove or loosen screws that are not in-cluded in this procedure.Note: After reassembling the Pickup, you need to perform “TiltAdjustment” of the Pickup.Preparation:Since you need to reposition the screw F03 to the original po-sit

40、ion, check the current position before removing the screwF03. Give a mark on the head of screw F03 to allow easy reposi-tioning. Check the end position of the screw F03. It will be almost thesame as the bottom surface of the chassis.1) Remove the DVD Traverse Assy. Refer to item 2.9.2) Remove a scre

41、w F01 (M1.7x3.5+Pan CMT) and detach F02(Hook L.S)3) Give a mark to the screw F03 for repositioning.4) Remove a screw F03 (Screw S) and detach F04/F05 (Pickupblock).F06 (SP Push Shaft) can be removed.5) Pull out F04 (Shaft L) from F05 (Pickup).Notes on reassembling: Assemble the screw F03 so that it

42、is roughly positioned tothe original position. Perform “Tilt Adjustment”. Refer to Stap 3 “Tilt Adjustment” in3.3 “Adjustment procedure”Fig.2-8REMOVAL PROCEDURESDo not remove or loosen93. ELECTRICAL ADJUSTMENT3.2 Parts Location for AdjustmentFig.3-1 Parts Location for Electorical Adjustment (DVD Mai

43、n P.C.B. Assy)Fig.3-2 Tilt Adjustment Screws (Mechanism Assy)3.1 Measurement instruments and Jigs1) DC Voltmeter2) AC Voltmeter3) Tracking Offset Meter LE-9055A or LTM-9055 (Leader Electronics Corp.)4) A-BEX Vertical Deviation Test Disc TDV-562 (DA09206A)5) SONY Test Disc Type 310Note: Perform the a

44、djustment in the order of “CD LD ON” and“DVD LD ON” as mentioned below:1. Press the STOP ( ) button once.The message will change as follows: AS ADJUST DVD LD ON2. Adjust VR120 to obtain 0V 10 mV DC on the DC voltmeter.3. Press the FORWARD SKIP ( ) button once.The following message will appear on the

45、 display, CD LD ON4. Adjust VR121 to obtain 0V 10 mV DC on the DC voltmeter.5. Press the FORWARD SKIP ( ) button again to select “DVDLD ON”, and confirm that the DC voltage is at the level that it wasadjusted to in step 2. If there is any deviance to the DC voltage,re-adjust.6. Press the FORWARD SKI

46、P ( ) button twice.The following message will appear on the display. CD LD ON LD OFFThe pickup will then move to the innermost position and stopsthere.7. Proceed to the next step.1. Press the STOP ( ) button once.Be sure that the following message appears on the display. MECHA ADJUST2. Press the EJE

47、CT ( ) button and insert the DVD Test Disc.3. Press the PLAY ( ) button to play back the disc.4. Press the FORWARD SKIP ( ) button to play back theChapter 16 (outermost track).5. Press the PAUSE ( ) button to pause the disc. (The disc willkeep turning.)6.Turn Screw A to obtain the minimum reading on

48、 the AC voltmeter.7. Turn Screw B to obtain the minimum reading on the AC voltmeter.8. Repeat steps 6 and 7 several times until the minimum readingsare obtained.9. Press the EJECT ( ) button to eject the disc.10.Proceed to the next step.STEPITEMSIGNALSOURCEOUTPUTCONNECTIONADJUSTMENTREMARKSASAdjustme

49、ntDC VoltmeterbetweenTP120(AS)(+)andTP107(VREF)(-)on DVD MainP.C.B. AssyVR120(for DVD,LD)VR121(for CD,LD)TiltAdjustmentDVD VerticalDeviationTest DiscTDV-562(DA09206)AC VoltmeterbetweenTP201(JI OUT)(+) andTP105(DGND)(-)on DVD MainP.C.B. AssyTilt ScrewsA and B231. Connect each measuring instrument as

50、follows:Connect a DC voltmeter between TP120 (AS) (+ terminal)and TP107 (VREF) (- terminal) on the DVD Main P.C.B. Assy.Connect an AC voltmeter between TP201 (JI OUT) (+ termi-nal) and TP105 (DGND) (-terminal) on the DVD Main P.C.B.Assy.Connect a tracking offset meter between TP300 (DSCTE) (+termina