Panasonic-RXDT30-pr-sm 维修电路原理图.pdf

《Panasonic-RXDT30-pr-sm 维修电路原理图.pdf》由会员分享，可在线阅读，更多相关《Panasonic-RXDT30-pr-sm 维修电路原理图.pdf（40页珍藏版）》请在收音机爱好者资料库上搜索。

1、ORDER NO. MD9502012C1Service ManualPortable Stereo CD SystemMASH* Radio CassetteRX-DT30ColourTAPE DECK: SG-20W MECHANISM SERIESTRAVERSE DECK : RAE01 13Z MECHANISM SERIESI SPECIFICATIONS? Radio SectionFrequency rangeFMAMIntermediate frequencyFMAMSensitivityFMAMH CD PlayerSampling frequencyDecodingBea

2、m sourceNo. of channelsWow and flutterD/A converter88-108MHz525 - 1705 kHz10.7 MHz455 kHz17 dB/50 mW( -3 dB limit sens. )51 dB/m/50 mW44.1 kHz16 bit IinearSemiconductor laser(wavelength 780 nm)2 channel, stereoLess than possible measurement dataMASH (1 bit DAC)Panasonic”/ (K) Black Type 1? Tape Reco

3、rderTrack systemRecording systemErasing systemMonitor systemFrequency rangeNormal? General4 track, 2 channel, stereoAC biasMulti pole magnetVariablesoundmonitor50 - 14000 HzPower requirementAC120V, 60HzPower consumption; 30WBattery 12 V (8 “D” size, R20/LR20 batteries)Speakers10 cm (4”) x 2JacksOutp

4、utHeadphones; 32c1Dimensions (W x H x D)580 x192 x260mm(223/s”x79/6”x1 01/4”)Weight 4.5 kg (9 lb. 15 oz.) without batteriesNotes :Specifications are subject to change without notice.Weight and dimensions are approximate. 1995 Matsushita Electronics (S) Pte. Ltd.All rights reserved. Unauthorized copy

5、ing anddistribution is a violation of law.RadioFans.CN 收音机爱 好者资料库 RX-DT30? Disassembly InstructionsWarning : This product uses a laser diode. Refer to caution statements on page 2.ACHTUNG :Die laserernheit nicht zerlegen.Die lasereinheit darf nur gegen eine vom hersteller spezrfizierte einheit ausge

6、tauscht werden.“ATTENTION SERVICER”Some chassis components may have sharp edges. Be careful when disassembling and servicing.Ref. No. 1 Removal of the HandleRef. No.2Procedure 1. Release 2 ribs. Procedure12. Pull out the handle._-m-_- Handle -_Ref. No.3Procedure2*3Removal of the Top Cabinet Unit1. P

7、ress the CD eject button.2. Remove 5 screw (0 - Q).3. Remove the Top Cabinet Unit.CD Eject ButtonRef. No.4Procedure2+31,41Removal of the Control P.C.B.I: Removal of the Front Cabinet11. Remove the battery cover.2. Remove 8 screws ( - 0 )._, Front Cabinet3.Press the 2 eject buttons.4.Release 1 claw.5

8、. Remove the front cabinet in the direction of arrow6.Remove 1 connector (CP307).1. Remove 2 connectors (CN303, CN801).2. Remove FFC cable from the connector CN702 (Control P.C.B.).3. Release 4 claws.FFC CableControl P.C.B.CN702ICN303 Claws-5-RadioFans.CN 收音机爱 好者资料库RX-DT30IRef. No.5Procedure2*31,5r-

9、 - - -Removal of the Connector P.C.B.1. .Remove3screws(0-Q).2. Remove 4 connectors (CN1, CN304. CN305, CN801).3. Remove the Connector P.C.B.Ref. No.6-I Removal of the Mechanism Unit_. .Ref. No.7Removal of the Traverse UnitFFC CableTraverse Unit*ICN702Remove 4 screws ( 0 - 0 ).Remove FFC cable from t

10、he connector CN702 (Control P.C.B.)CN1CN305;,_+ ,“,I ,/DGSRL203M11 RVD1 SS1 33TA SLB55VRTE7CaCathodeq iA, 4.7”AN8802SCE1 V132PST600DTA2SB709SBA1442A2SC 1740SRTARVTDTC114EST-ll-RX-DT30? Schematic Diagram13ASERVO CIRCUITZY;zlC701AN8802SCE1 VSERVO AMPP2r_RX-DTRX-DT30I? Schematic Diagram2SC1684RTAWXHING

11、(HIGH SPEED)a101.0102.0201.0202;st$OCDTAJO11ilDECK 2-111-R CHREC/PtAY“EL C HKz.307AN731 7REC/PLAY AMP6:Q204 ”RIO, I*Ktzlcto, K68oPJI03052SC1740SRTABEN PROcf-14-NOTES:? SW301? S501? S601? S602? S603? VR601? SW401? SW403-1 - SW403-4 :? SW404? VR301-1 - VR301-2 :? VR302-1 - VR302-2 :Beatproof Switch. (

12、I.BEATPFiOOF I, ll.BEATPROOF II)AC/BatterySelect Switch.(JK501)Deck 1 Playback Switch.Deck 2 Playback Switch.Deck 2 Record Switch.Tape Speed Adjustment Switch.CD Open/Close Switch.Function Select Switch. (CD.CD, R.RADIO, T.TAPE)Edit Recording Speed Switch.Volume Control V.R.XBS Control V.R.c For CON

13、TROL CIRCUIT ? SW801 : Easy CD Record Switch. (EASY CD REC). SW802 : Memory Switch. (MEMORY)? SW803 : CD Reverse Skip Switch. ( w )? SW804 : CD Forward Skip Switch. ( m )? SW805 : CD Repeat Switch. (REPEAT)? SW806 : CD Play/Pause Switch. ( b/II )? SW807 : CD Stop/Clear Switch. (m/CLEAR )? S701 : Res

14、et Switch.? SW1-1 - SW1-2 : Band select switch (S.FM STEREO, F.FM, A.c GENERAL ? Battery Current consumption:Vol.min . . . . . . . . . . . . . 0.037A (RADIO) Vol. max . . . . . . . . . . . . 0.066A (RADIO)0.042A (TAPE) 0.090A (TAPE)0.052A (CD) 0.085A (CD)Measurementcondition:Radio :FM 60 dB, 30%modA

15、M 74 dB/m, 30%modTape: 315 Hz, OdBCD : 1 kHz, OdB? The voltage value and waveforms are the reference voltage of this unitmeasured by DC electronic voltmeter (high impedance) and oscilloscope onthe basis of chassis.Accordingly, there may arise some error in voltage values and waveformsdepending upon

16、the internal impedance of the tester or the measuring unit.CAUTION : FOR CONTINUED PROTECTIONAGAINST FIRE HAZARD, REPLACE ONLY WITHSAME TYPE 3 A 125V FUSENo mark . . . Tape Playback( ) . CD . . FM( ). . . AMCAUTION !IC and LSI are sensitive to static electricity.Secondary trouble can be prevented by

17、 taking care during repair.? Cover the parts boxes made of plastics with aluminum foil.? Ground the soldering iron.? Put aconductive mat on the work table.? Do not touch the pins of IC or LSI with fingers directly.? Important safety notice :Components identified by h mark have special characteristic

18、s important forsafety. When replacing any of these components, use only manufacturersspecified parts.? This schematic diagram may be modifiedatanytime with thedevelopmentof new technology.* .MAIN SIGNAL LINEi:.f=4:./. . . CD SIGNAL LINEkzz& . . .TAPE PLAYBACK SIGNAL LINEUOO$ .RECORDING SIGNAL LINE17

19、; . . . FM SIGNAL LINE- . . . +B LINEA1 RISK OF FIRE-REPLACE FUSE AS MARKED.-This svmbol located near the fuse indicatesthat the fuse-used is a fast operating type. Forcontinued protection against fire harzard, replacewith the same type fuse. For fuse rating, refer to therating adjacent to the symbo

20、l.ttfCe symbol indique que ie fusible utilise est arapide. Pour une protection permanente, nutiliserque des fusibles de meme type. Ce demier estindique la qu le present symbol est appose.FUSE CAUTION-19-RX-DT30 ? Terminal Function of ICs? IC702 (MN66271 RA)Servo Processor / Digital Signal Processor

21、/II I IPin Mark I/O FunctionNo.1 BCLK 0 Serial bit clock terminal (Not used, open)2 LRCK 0 L/R discriminating signal (Not used, open)3 SRDATA 0 Serial data (Not used, open)4 DVDD1 IPower supply (digital circuit) terminal5 DVSS1 (-1 GND (digital circuit) terminalII I6 TX 0 Digital audio interface sig

22、nalII I7 MCLK I Microprocessor command clock signalII I8 MDATA I Microprocessorcommanddatasignal9 MLD I Microprocessor command loadsignal1011121314151617SENSE 0Sense signal output(OFT,FESL,MAGEND,NAJEND,FQSAD,SFG)/FLOCK 0 Optical servo condition(focus)(L : lead-in)/TLOCK 0 Optical servo condition(tr

23、acking)(“L” : lead-in)BLKCK 0 Sub-code block clock (f=75Hz)External clock signal input for sub-code ClSQCK 1 registerSUBQ 0 Sub-code Q code outputDMUTE I Muting input (“H” : mute)Status signal outputSTAT0 (CRC,CUE,CLVS,lTSTVP,FCLV,SQCK)18-19/RSTSMCKI Reset input1/2_divided clock signal of crystal os

24、cillating at0 MSEL=H” (fSMCK=8.4672MHz)1/4-divided clock signal of crystaloscillating at MSEL=“L(fSMCK=4.2336MHz)20 PMCK 0 1 / 1 92-divided clock signal of crystaloscillating(fPMCK=88.2kHz)(Not used, open)21 TRV 0 Traverse servo control output22 TVD 0 Traverse drive signal output23 PC 0 Spindle moto

25、r ON signal output (L” : ON)24 ECM0Spindle motordrive signal output(forced mode output)- - -_ Spindle motordrive signal output25ECS26 KICK27 TRD0(servo error signal output)0 Kick pulse output0 Tracking drive outputII II28 FOD 0 Focus drive output29 VREFID/A (drive) output (TVD,ECS,TRD,FOD,FBAL,TBAL)

26、 Reference voltage input.Digital Filter / D/A ConverterI,1 1IPin Mark I/ONo.Function30 FBALoFocus balance adjustment output(Not used,open)31 TBAL 0 Tracking balanceadjustmentoutput32 FE I Focus error signal input (analog input)33 TE I Tracking error signal input (analog input)34 RFENV I RF envelope

27、signal inputIII II35 VDET I Vibration detection signal input (“H” : detection)36 OFT I Off-track signal input (“H” : off track)I,I1 (fPCK=4.321MHz during normal playback)54 PDO I 0 IPhasecompansonsignalof EFM and PCKsignals (Not used, open)55 SUBC 0 Sub-code serial data output (Not used, open)56 SBC

28、KI Clock input for sub-code serial data(Not used. open)57 v s s - GND58 Xl I Crystal oscillating circuit input (f=16.9344MHz)5960/X2 0 Crystal oscillating circuit output (f=16.9344MHz)VDD I Power supply input (foroscillating circuit)-26-RX-DT30FunctionI I61 BYTCK1 0 1 Byte clock output (Not used, op

29、en)Sub-code frame clock signal outputCrystal frame clock signal output(fCLK=7.35kHz,double=l4.7kHz)Interpolation flag output (“H” : interpolation)FLAG1 0 1 Flag output (Not used, open)0 Spindle servo phase synchronizing signal/ 66 / cLvs 1 / (Not used:open)output ( H : CLV, “L” : rough servo)Frame r

30、esynchronizing signal output70 IRST2 I Reset input through MASH circuit (“L” : Reset)71 /TEST I Test input? IC701 (AN8802SCE1 V)Servo AmplifierPinMarkl/O FunctionNo.1 PDAD I PDA channel signal input with delay2 PDA I PDA channel signal input without delay3 LPD I Laser PD connection4 LD 0 Power suppl

31、y for LD drivingRF amplifier output (Not used, open)Capacitor connection for RF detection11 CEA I Capacitor connection for HPF amplifier12 GND- Groundconnection13 LDON I ON/OFF input of LD APC(“H” : ON, I” : OFF)14 TES I Tracking error shunt signal input15PLAY I Play signal input (“H” : PLAY)16 VWEL

32、 I Double speed (“H” : double, “L” : single)“L” : SMCK=4.2336MHz(“H” : Q code buffer mode)29 FBAL I Focus balance signal input30 VREF 0 Reference voltage output31 PDB I Photo detection Bch input without delay32 PDBD I Photo detection Bch input with delay-27-RX-DT30 1? IC801 (M38222M2051)System Micro

33、processorFunction“lJ I LCD bias reference voltage V22“LlILCD bias reference voltage Vi3PCNT 0Power control signal outputI I4 -1 - IGND5 - -GND6MUTEA 0AF muting control signal output7 - -GNDaKEY1IKey source inputI I-GND10FUNC 0Mode select control signal output11I-GND16I II I19 - -GND20SQCK 0CD subcod

34、e clock input21RECH IREC detect signal input22SUBQ ICD subcode data input23 CD CLOSE ICD close detect switch signal input24CDON ICD detect signal input25 - -GND26 RESET SW IReset SW (S701) signal input27RSTISystem reset signal input28XC IN -GND29 XCOUT -GND30XINIClock input31XOUT 0Clock output41MCLK

35、 0CD signal process IC control signal outpu42MDATA 0CD signal.process IC data output43MLD0CD signal process IC strove signal output44,-Not used4649SEG231I0LCD segment signal output64SEG865SEG7I1-Not used72SEGO73VDDIPower supply (+5V)74VREFIA/D converter reference voltage75AVSS -GND76COM3,0LCDcommon

36、signal output79COMO80VL3ILCD bias reference voltage V3-28-(RX-DT30? IWO3 (AlFocus Co8389SEl)I / Tracking Coil / Traverse Motor / Spindle Motor7 j N R E S E Tl/OFunctionIPower supply terminalI Referencevoltage inputIMotor driver (4) inputIMotor driver (3) input- Groundconnection- GroundconnectionI Re

37、setinput- GroundconnectionIMotor driver (2) inputIPC2 (power cut) inputI Motordriver(l)inputIPC1 (powercut) input (Not used, open)“)? Alignment Points0000 IC702W-F)4Fig.1Fig. 2und connection (2) for driverSERVOP.C.B.Mechanical adjustment screwsAllen wrench(szzP1101c)-29-, RX-DT30 1H Measurements and

38、 Adjustments? TUNER SECTION. ALIGNMENT INSTRUCTIONREAD CAREFULLY BEFORE AT-TEMPTING ALIGNMENT? Set power source voltage to 12 V DC.? Set XBS switch to minimum? Set volume control to maximum? Output of signal generator should be no higher than necessary? Set band switch to AM or FMto obtain an output

39、 reading.? Set selector switch to RADIONote :? No FM STEREO alignment is required due to Tuner IC (BAl442A) is used.SIGNAL GENERATOR orINDICATORSWEEP GENERATORRADIO DIAL(ELECTRONICADJUSTMENTSETTINGVOLTMETER or(Shown in Fig. 1)REMARKSCONNECTIONS FREQUENCYOSCILLOSCOPE)Fashion a loop ofHeadphone Jackse

40、veral turns of455 kHzPoint of non-(32D)wire and radiate a30 % Mod.interference.(on/abicalectfw plug as shownT2(AM IFT)Adjust for maximum output.signal into the loopat 400 Hzabout 6OOkHz)in Fig.2 and then connectant. of receiver.tie lead wires of Me plug tothe measuring instrument. AM-IF ALIGNMENT? A

41、M-RF ALIGNMENTSIGNAL GENERATOR orINDICATORSWEEP GENERATORRADIO DIAL(ELECTRONICADJUSTMENTREMARKSSETTINGVOLTMETER or(Shown in Fig. 1)CONNECTIONS FREQUENCYOSCILLOSCOPE)511 kHzTuningcapacitorIIIIfully closed.L4(AM OSC Coil)Adjust for maximum output.II1753 kHzTuningcapacitorfully opened.CT1 -4(AM OSCTrim

42、mer) Adjust for maximum output.600 kHzTune to signalI LS(AM ANT Coil)Adjust for maximum output. Adjust L3 bymoving coil bobbin along ferrite core.II1500 kHzI,I Fix antenna coil with wax after completing alignment.CT1 -3(AM ANT Trimmer) Adjust for maximum output.? FM-IF ALIGNMENTSIGNAL GENERATOR orSW

43、EEP GENERATORCONNECTIONS FREQUENCYRADIO DIALSETTINGINDICATOR(ELECTRONICVOLTMETER orOSCILLOSCOPE)ADJUSTMENT(Shown in Fig. 1)REMARKSConnect to testpointm throughceramic capacitor.Negative side totest point m .10.7 MHz(Sweep)Connect vert. amp. ofPoint of non-scope to test pointinterference.(on/ mabout

44、90 MHz)Negative side to testpoint m.Tl(FM 1st)Waveform is shown in Fig. 3TB(FM 2nd)Waveform is shown in Fig. 4? FM-RF ALIGNMENTConnect to testpoint mthrough FM dummyantenna.Negative side totest point m66.2 MHz109.2 MHz106 MHzVariablecapacitorfully closed.Variablecapacitorfully opened.Headphone Jack(

45、32)Fabicale the plug as showninFig.2 and then connectL2 (FM OSC Coil)*2 Adjust for maximum output.the lead wires of the plugtothe measuring instrument.CT1 -2 (FM OSCII8,Trimmer)Tune to signalI,CTI-1 (FM ANTTrimmer)*2 Three output response will be present; proper tuning is the center frequency.-3O-1

46、RX-DT30? TAPE SPEED ALIGNMENT (DECK 1,2)INormalspeed(Standard Value : 3000 * 50 Hz . . . Deck 2)(StandardValue : Deck 2 * 50 Hz . . . Deck 1)High speed(Standard Value : 5100 Hz -)1. Test equipment connection is shown in figure.2. Set the unit to “TAPE” position.3. Playback the middle part of the tes

47、t tape (QZZCWAT) in deck 2.4. Adjust VR601 for the output value shown in Fig. 5.5. Playback the middle part of the test tape (QZZCWAT) in deck 1.6. Repeat step 4.5. Set the unit to “HIGH” speed position.6. Place the cassette deck into the REC mode (DECK 1)and the PLAY mode (DECK 2).7. Repeat step 4.

48、Note :The normal speed adjustment must be done before thehigh speed adjustment.? CASSETTE DECK SECTION? ALIGNMENT INSTRUCTIONREAD CAREFULLY BEFORE Al-TEMPTING ALIGNMENTNote : No Azimuth Head Alignment is required due to Aztec Head is used in the cassette mechanism.UNITIISpeaker terminalLCH” CR CHcDi

49、gital frequencycounterAdjusment Target : 3000 * 50 Hz. Normal speed (Deck 2)Adjusment Target : Deck 2 * 50 HzNormal speed (Deck 1)Adjusment Target : 5100 Hz -. . . High speed? ALIGNMENT POINTSFM OSC109.2MHzFM ANTAM ANTAM OSC106MHz1500kHz1753kHz1 Ipiq/CT1-41FM 1st10.7MHzIFM 2nd10.7MHzIFig. 1FM OSCAM

50、IFT66.2Ml-l455kHzDECK P.C.B.TAPE SPEED ALIGNMENT? r=i,1IJFig. 5-3l-AM ANT6OOkHz-1L31AM 0%BllkHz-aaTo HeadphonerT Z Zeasuring,-ir-eI) InstrumentL-2$,R=16-32nFig. 2Fig. 3I. 10.7 MHz,1,-_,Fig. 41, RX-DT30 1? CD Player SectionWarning:Caution :This product uses a laser diode. Refer to caution statements