Panasonic Rx-Dt30 Portable 电路图.pdf

《Panasonic Rx-Dt30 Portable 电路图.pdf》由会员分享，可在线阅读，更多相关《Panasonic Rx-Dt30 Portable 电路图.pdf（40页珍藏版）》请在收音机爱好者资料库上搜索。

1、ORDER NO. MD9502012C1 Service Manual Portable Stereo CD System MASH* Radio Cassette RX-DT30 Colour TAPE DECK : SG-20W MECHANISM SERIES TRAVERSE DECK : RAE01 13Z MECHANISM SERIES I SPECIFICATIONS ? Radio Section Frequency range FM AM Intermediate frequency FM AM Sensitivity FM AM H CD Player Sampling

2、 frequency Decoding Beam source No. of channels Wow and flutter D/A converter 88-108MHz 525 - 1705 kHz 10.7 MHz 455 kHz 17 dB/50 mW ( -3 dB limit sens. ) 51 dB/m/50 mW 44.1 kHz 16 bit Iinear Semiconductor laser (wavelength 780 nm) 2 channel, stereo Less than possible measurement data MASH (1 bit DAC

3、) Panasonic” / (K) Black Type 1 ? Tape Recorder Track system Recording system Erasing system Monitor system Frequency range Normal ? General 4 track, 2 channel, stereo AC bias Multi pole magnet Variablesoundmonitor 50 - 14000 Hz Power requirement AC 120V, 60Hz Power consumption; 30W Battery 12 V (8

4、“D” size, R20/LR20 batteries) Speakers 10 cm (4”) x 2 Jacks Output Headphones; 32c1 Dimensions (W x H x D) 580 x192 x260mm (223/s”x79/6”x1 01/4”) Weight 4.5 kg (9 lb. 15 oz.) without batteries Notes : Specifications are subject to change without notice. Weight and dimensions are approximate. 1995 Ma

5、tsushita Electronics (S) Pte. Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law. RadioFans.CN 收音机爱 好者资料库 RX-DT30 ? Disassembly Instructions Warning : This product uses a laser diode. Refer to caution statements on page 2. ACHTUNG :Die laserernheit nicht zerlegen.

6、Die lasereinheit darf nur gegen eine vom hersteller spezrfizierte einheit ausgetauscht werden. “ATTENTION SERVICER”Some chassis components may have sharp edges. Be careful when disassembling and servicing. Ref. No. 1 Removal of the Handle Ref. No. 2 Procedure 1. Release 2 ribs. Procedure 12. Pull ou

7、t the handle. _ -m-_- Handle -_ Ref. No. 3 Procedure 2*3 Removal of the Top Cabinet Unit 1. Press the CD eject button. 2. Remove 5 screw (0 - Q). 3. Remove the Top Cabinet Unit. CD Eject Button Ref. No. 4 Procedure 2+31,4 1 Removal of the Control P.C.B. I : Removal of the Front Cabinet 1 1. Remove t

8、he battery cover. 2. Remove 8 screws ( - 0 ). _, Front Cabinet 3.Press the 2 eject buttons. 4.Release 1 claw. 5. Remove the front cabinet in the direction of arrow 6.Remove 1 connector (CP307). 1. Remove 2 connectors (CN303, CN801). 2. Remove FFC cable from the connector CN702 (Control P.C.B.). 3. R

9、elease 4 claws. FFC Cable Control P.C.B. CN702 I CN303 Claws -5- RadioFans.CN 收音机爱 好者资料库 RX-DT30 I Ref. No. 5 Procedure 2*31,5 r- - - - 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 t

10、he Mechanism Unit _. . Ref. No. 7 Removal of the Traverse Unit FFC Cable Traverse Unit * I CN702 Remove 4 screws ( 0 - 0 ). Remove FFC cable from the connector CN702 (Control P.C.B.) CN1 CN305 ; ,_+ , “,I ,/ DG S RL203M11 RVD1 SS1 33TA SLB55VRTE7 Ca Cathode q i A , 4.7” AN8802SCE1 V 132 PST600DTA 2S

11、B709S BA1442A 2SC 1740SRTA RVTDTC114EST -ll- RX-DT30 ? Schematic Diagram 13 A SERVO CIRCUIT ZY ;z lC701 AN8802SCE1 V SERVO AMP P2 r _ _ _ _ _ _ _ _ _ _ _ RX-DT RX-DT30 I ? Schematic Diagram 2SC1684RTA WXHING(HIGH SPEED) a101.0102.0201.0202 ;st$OCDTA JO1 1 ilDECK 2-111 -R CH REC/PtAY “EL C H Kz.307 A

12、N731 7 REC/PLAY AMP 6: Q204 ” RIO, I*K tzl cto, K68oP J I 0305 2SC1740SRTA BEN 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. (I.BEATPFiOOF I, ll.BEATPROOF II) AC/BatterySelect Switch.(

13、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 CONTROL CIRCUIT ? SW801 : Easy CD Record Switch. (

14、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 : Reset Switch. ? SW1-1 - SW1-2 : Band select

15、 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%mod AM 74 dB/m, 30%mod Tape : 315 Hz,

16、 OdB CD : 1 kHz, OdB ? The voltage value and waveforms are the reference voltage of this unit measured by DC electronic voltmeter (high impedance) and oscilloscope on the basis of chassis. Accordingly, there may arise some error in voltage values and waveforms depending upon the internal impedance o

17、f the tester or the measuring unit. CAUTION : FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH SAME TYPE 3 A 125V FUSE No mark . . . Tape Playback ( ) . CD . . FM ( ) . . . AM CAUTION ! IC and LSI are sensitive to static electricity. Secondary trouble can be prevented by taking care d

18、uring 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 characteristics import

19、ant for safety. When replacing any of these components, use only manufacturers specified parts. ? This schematic diagram may be modifiedatanytime with thedevelopment of new technology. * .MAIN SIGNAL LINE i:. f=4 : :./. . . CD SIGNAL LINE kzz . . . FM SIGNAL LINE - . . . +B LINE A 1 RISK OF FIRE-REP

20、LACE FUSE AS MARKED. -This svmbol located near the fuse indicates that the fuse-used is a fast operating type. For continued protection against fire harzard, replace with the same type fuse. For fuse rating, refer to the rating adjacent to the symbol. ttfCe symbol indique que ie fusible utilise est

21、a rapide. Pour une protection permanente, nutiliser que des fusibles de meme type. Ce demier est indique la qu le present symbol est appose. FUSE CAUTION -19- RX-DT30 ? Terminal Function of ICs ? IC702 (MN66271 RA) Servo Processor / Digital Signal Processor / II I I Pin Mark I/O Function No. 1 BCLK

22、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) terminal 5 DVSS1 (-1 GND (digital circuit) terminal II I 6 TX 0 Digital audio interface signal II I 7 MCLK I Microprocessor

23、 command clock signal II I 8 MDATA I Microprocessorcommanddatasignal 9 MLD I Microprocessor command loadsignal 10 11 12 13 14 15 16 17 SENSE 0 Sense signal output (OFT,FESL,MAGEND,NAJEND,FQSAD,SFG) /FLOCK 0 Optical servo condition(focus)(L : lead-in) /TLOCK 0 Optical servo condition(tracking)(“L” :

24、lead-in) BLKCK 0 Sub-code block clock (f=75Hz) External clock signal input for sub-code Cl SQCK 1 register SUBQ 0 Sub-code Q code output DMUTE I Muting input (“H” : mute) Status signal output STAT 0 (CRC,CUE,CLVS,lTSTVP,FCLV,SQCK) 18 - 19 /RST SMCK I Reset input 1/2_divided clock signal of crystal o

25、scillating at 0 MSEL=H” (fSMCK=8.4672MHz) 1/4-divided clock signal of crystal oscillating at MSEL=“L(fSMCK=4.2336MHz) 20 PMCK 0 1 / 1 92-divided clock signal of crystal oscillating(fPMCK=88.2kHz) (Not used, open) 21 TRV 0 Traverse servo control output 22 TVD 0 Traverse drive signal output 23 PC 0 Sp

26、indle motor ON signal output (L” : ON) 24 ECM 0 Spindle motordrive signal output (forced mode output) - - -_ Spindle motordrive signal output 25ECS 26 KICK 27 TRD 0(servo error signal output) 0 Kick pulse output 0 Tracking drive output II I I 28 FOD 0 Focus drive output 29 VREF I D/A (drive) output

27、(TVD,ECS,TRD,FOD, FBAL,TBAL) Reference voltage input. Digital Filter / D/A Converter I,1 1 I Pin Mark I/O No. Function 30 FBAL oFocus balance adjustment output (Not used,open) 31 TBAL 0 Tracking balanceadjustmentoutput 32 FE I Focus error signal input (analog input) 33 TE I Tracking error signal inp

28、ut (analog input) 34 RFENV I RF envelope signal input I II I I 35 VDET I Vibration detection signal input (“H” : detection) 36 OFT I Off-track signal input (“H” : off track) I , I 1 (fPCK=4.321MHz during normal playback) 54 PDO I 0 IPhasecompansonsignalof EFM and PCK signals (Not used, open) 55 SUBC

29、 0 Sub-code serial data output (Not used, open) 56 SBCK I Clock input for sub-code serial data (Not used. open) 57 v s s - GND 58 Xl I Crystal oscillating circuit input (f=16.9344MHz) 59 60 / X2 0 Crystal oscillating circuit output (f=16.9344MHz) VDD I Power supply input (foroscillating circuit) -26

30、- RX-DT30 Function I I 61 BYTCK1 0 1 Byte clock output (Not used, open) Sub-code frame clock signal output Crystal 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

31、 / 66 / cLvs 1 / (Not used:open) output ( H : CLV, “L” : rough servo) Frame resynchronizing signal output 70 IRST2 I Reset input through MASH circuit (“L” : Reset) 71 /TEST I Test input ? IC701 (AN8802SCE1 V) Servo Amplifier Pin Mark l/O Function No. 1 PDAD I PDA channel signal input with delay 2 PD

32、A I PDA channel signal input without delay 3 LPD I Laser PD connection 4 LD 0 Power supply for LD driving RF amplifier output (Not used, open) Capacitor connection for RF detection 11 CEA I Capacitor connection for HPF amplifier 12 GND- Groundconnection 13 LDON I ON/OFF input of LD APC(“H” : ON, I”

33、: OFF) 14 TES I Tracking error shunt signal input 15PLAY I Play signal input (“H” : PLAY) 16 VWEL I Double speed (“H” : double, “L” : single) “L” : SMCK=4.2336MHz (“H” : Q code buffer mode) 29 FBAL I Focus balance signal input 30 VREF 0 Reference voltage output 31 PDB I Photo detection Bch input wit

34、hout delay 32 PDBD I Photo detection Bch input with delay -27- RX-DT30 1 ? IC801 (M38222M2051) System Microprocessor Function “lJ I LCD bias reference voltage V2 2“LlILCD bias reference voltage Vi 3PCNT 0Power control signal output I I 4 -1 - IGND 5 - -GND 6MUTEA 0AF muting control signal output 7 -

35、 -GND aKEY1IKey source input I I - GND 10FUNC 0Mode select control signal output 11 I- GND 16 I II I 19 - -GND 20SQCK 0CD subcode clock input 21RECH IREC detect signal input 22SUBQ ICD subcode data input 23 CD CLOSE ICD close detect switch signal input 24CDON ICD detect signal input 25 - -GND 26 RES

36、ET SW IReset SW (S701) signal input 27RSTISystem reset signal input 28XC IN -GND 29 XCOUT -GND 30XINIClock input 31XOUT 0Clock output 41MCLK 0CD signal process IC control signal outpu 42MDATA 0CD signal.process IC data output 43MLD0CD signal process IC strove signal output 44 ,- Not used 46 49SEG23

37、1 I 0LCD segment signal output 64SEG8 65SEG7 I 1 - Not used 72SEGO 73VDDIPower supply (+5V) 74VREFIA/D converter reference voltage 75AVSS -GND 76COM3 , ,0LCDcommon signal output 79COMO 80VL3ILCD bias reference voltage V3 -28- (RX-DT30 ? IWO3 (Al Focus Co 8389SEl) I / Tracking Coil / Traverse Motor /

38、 Spindle Motor 7 j N R E S E T l/OFunction IPower supply terminal I Referencevoltage input IMotor driver (4) input IMotor driver (3) input - Groundconnection - Groundconnection I Resetinput - Groundconnection IMotor driver (2) input IPC2 (power cut) input I Motordriver(l)input IPC1 (powercut) input

39、(Not used, open) “) ? Alignment Points 0 0 0 0 IC702 W-F) 4 Fig.1 Fig. 2 und connection (2) for driver SERVO P.C.B. Mechanical adjustment screws Allen wrench (szzP1101c) -29- , RX-DT30 1 H Measurements and Adjustments ? TUNER SECTION . ALIGNMENT INSTRUCTION READ CAREFULLY BEFORE AT-TEMPTING ALIGNMEN

40、T ? 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 FM to obtain an output reading. ? Set selector switch to RADIO Note :? No FM STEREO alignment is required du

41、e to Tuner IC (BAl442A) is used. SIGNAL GENERATOR or INDICATOR SWEEP GENERATOR RADIO DIAL (ELECTRONICADJUSTMENT SETTING VOLTMETER or(Shown in Fig. 1) REMARKS CONNECTIONS FREQUENCY OSCILLOSCOPE) Fashion a loop of Headphone Jack several turns of455 kHzPoint of non-(32D) wire and radiate a30 % Mod.inte

42、rference.(on/abicale c tfw plug as shown T2(AM IFT)Adjust for maximum output. signal into the loopat 400 Hzabout 6OOkHz) in Fig.2 and then connect ant. of receiver. tie lead wires of Me plug to the measuring instrument. . AM-IF ALIGNMENT ? AM-RF ALIGNMENT SIGNAL GENERATOR or INDICATOR SWEEP GENERATO

43、R RADIO DIAL(ELECTRONICADJUSTMENT REMARKS SETTINGVOLTMETER or(Shown in Fig. 1) CONNECTIONS FREQUENCY OSCILLOSCOPE) 511 kHz Tuningcapacitor II II fully closed. L4(AM OSC Coil) Adjust for maximum output. II 1753 kHz Tuningcapacitor fully opened. CT1 -4(AM OSCTrimmer) Adjust for maximum output. 600 kHz

44、 Tune to signalI LS(AM ANT Coil) Adjust for maximum output. Adjust L3 by moving coil bobbin along ferrite core. II 1500 kHz I, I Fix antenna coil with wax after completing alignment. CT1 -3(AM ANT Trimmer) Adjust for maximum output. ? FM-IF ALIGNMENT SIGNAL GENERATOR or SWEEP GENERATOR CONNECTIONS F

45、REQUENCY RADIO DIAL SETTING INDICATOR (ELECTRONIC VOLTMETER or OSCILLOSCOPE) ADJUSTMENT (Shown in Fig. 1) REMARKS Connect to test pointm through ceramic capacitor. Negative side to test point m . 10.7 MHz (Sweep) Connect vert. amp. of Point of non- scope to test point interference.(on/ m about 90 MH

46、z) Negative side to test point m. Tl(FM 1st)Waveform is shown in Fig. 3 TB(FM 2nd) Waveform is shown in Fig. 4 ? FM-RF ALIGNMENT Connect to test point m through FM dummy antenna. Negative side to test point m 66.2 MHz 109.2 MHz 106 MHz Variable capacitor fully closed. Variable capacitor fully opened

47、. Headphone Jack (32) Fabicale the plug as shown inFig.2 and then connect L2 (FM OSC Coil)*2 Adjust for maximum output. the lead wires of the plugto the measuring instrument. CT1 -2 (FM OSC II 8, Trimmer) Tune to signal I, CTI-1 (FM ANT Trimmer) *2 Three output response will be present; proper tunin

48、g is the center frequency. -3O- 1 RX-DT30 ? TAPE SPEED ALIGNMENT (DECK 1,2) I Normalspeed(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” positi

49、on. 3. Playback the middle part of the test 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. Note : The normal speed adjustment must be done before the high speed adjustment. ? CASSETTE DECK SECTION ? ALIGNMENT INSTRUCTION READ CAREFULLY BEFO