Kenwood-HM-381-MD-Service-Manual 电路图 维修手册.pdf

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1、70% 678679 620 605 680 681 677 686 674 684 607 612 683 682 685 676 675 603 614 JK602 (HM-381MD) MICRO HiFi COMPONENT SYSTEM RXD-M31MD/ LS-M31(M) SERVICE MANUAL 1999-12/B51-5555-00 (K/K) 1853 KENWOOD-Crop. certifies this equipment conforms to DHHS Regulations No. 21 DFR 1040. 10, Chapter 1, Subchapte

2、r J. DANGER : Laser radiation when open and interlock defeated. AVOID DIRECT EXPOSURE TO BEAM * Refer to parts list on page 42. In compliance with Federal Regulations, following are repro- ductions of labels on, or inside the product relating to laser product safety. Front cabinet (A60-1745-08) Top

3、panel (A21-3801-08) Knob (MD EJECT) (K29-7702-08) Knob (VOLUME) (K29-7690-08) Control panel * (A21-) Knob (ON/STANDBY) (K29-7700-08) Cass door cover (A02-2945-08) Headphone jack (E11-0398-08) MD door (A52-0376-08) Knob (TAPE/STOP) (K29-7699-08) Knob (MD/CD PLAY) (K29-7698-08) Knob (PANEL BUTTON) (K2

4、9-7701-08) Knob (MENU) (K29-7692-08) Knob (TAPE REC) (K29-7691-08) Knob (SET DEMO) (K29-7694-08) Knob (REPEAT) (K29-7693-08) Display lens (B12-0386-08) Cass door lens (B10-3524-08) Tuning panel (A21-3779-08) Knob (MD REC) (K29-7696-08) Knob (SOUND) (K29-7697-08) Knob (FF/TUNER/AUX) (K29-7695-08) Rad

5、ioFans.CN 收音机爱 好者资料库 SYSTEMMAIN UNITSPEAKER HM-381MD RXD-M31MDLS-M31(M) FM indoor antenna (1) Loop antenna (1)Batteries (R6/AA) (2) * AC (T90-0846-08) (E03-0115-05)(T90-0801-05) plug adaptor (1) * Use to adapt the plug on the power cord to the shape of the wall outlet. (Accessory only for regions wh

6、ere use is necessary.) Remote control unit (1) (A70-1241-05) : RC-F503 (K,P,M) (A70-1287-05) : RC-M0505E (E,T) Battery cover (A09-1114-08) REMOTE CONTROL UNIT RC-F0503E SLEEPTONESOUND 123TIMER 456REPEAT 789RANDOM +100PGMCLEAR DOT DISP.TIME DISP.TAPE P.CALL TAPETUNER BAND CD PTYTA/NEWSAUX SETENTERMUT

7、E 4 2 37 % fi 6 1 POWER VOLUME O.T.E. Operation to reset The microcomputer may fall into malfunction (impossibil- ity to operate, erroneous display, etc.) when the power cord is unplugged while unit is ON or due to an external factor. In this case, execute the following procedure to reset the microc

8、omputer and return it to normal condi- tion. Unplug the power cord from the power outlet then, while holding the “set/demo” key depressed, plug the power cord again. Please note that resetting the microcomputer clears the contents stored in and it returns to condition when it left the factory. 22 se

9、t/demo RXD-M31MD 2 CONTENTS / ACCESSORIES / CAUTIONS CONTENTS / ACCESSORIES / CAUTIONS.2 EXTERNAL VIEW.3 BLOCK DIAGRAM .4 CIRCUIT DESCRIPTION.5 ADJUSTMENT.11 WAVE FORM.12 PC BOARD .14 SCHEMATIC DIAGRAM .21 EXPLODED VIEW .39 PARTS LIST.42 SPECIFICATIONS .53 Accessories Cautions System configuration C

10、ontents Refer number for LS-M31(M), refer to parts list on page 52. Note related to transportation and movement Before transporting or moving this unit, carry out the follow- ing operations. 1 Remove the CD or MD from the unit. 2 Press the 6 key of the MD. 3 Press the 6 key of the CD. 4 Wait for som

11、e time and verify that the display becomes as shown in the figure. 5 Wait a few seconds and turn the unit OFF. RadioFans.CN 收音机爱 好者资料库 RXD-M31MD 3 EXTERNAL VIEW FM 300W FM 75W AM GND DIGITAL OUT OPTICAL ANTENNA AUX INPUT AC 110120VAC 220240V SPEAKERS (616) + + SUPER WOOFER PRE OUT MANUALAUTO PANEL O

12、PEN/CLOSE R R L L Metal plate (RIGHT SIDE) (A51-1337-08) Metal plate (LEFT SIDE) (A50-1332-08) Speaker terminal (E70-0113-08) Phono jack (E63-1092-08) Slide switch (S62-0090-08) Power cord bushing * (J42-) AC power cord * (E30-) Slide switch * (S62-0091-08) Lock terminal board * (E70-) HS cover (BLA

13、CK) (F07-1685-18) RCA jack (E63-1091-08) Oscillating module* (OPTICAL) (W02-1114-05) * Refer to parts list on page 42. RadioFans.CN 收音机爱 好者资料库 RXD-M31MD 4 BLOCK DIAGRAM DISPLAY MD CONTROL BOARD MAIN BOARD ONLY E,T TYPE POWER BOARD RXD-M31MD BOARDBOARD KEY BOARD KEY CASSETTE BOARD TRANSFORMER BOARD A

14、UX IN ATT -3dB FM AM ANTTUNER ERASE R/P BIAS TRAP OSC BIAS Q713 IC702 IC703 FE-BIAS VR201 (RF-AMP) CXA1571M IC202 CXD2587Q (DSP/DAC/CD-TEXT) IC201 (4ch BTL-DRIVER) BA5979S IC203 MECHA. CD DIGITAL OUT RDS (MAIN u-COM) IC401 IC103 REMOTE FL FL DRIVER (A/D) KEY ENCODER ROTARY C0NTROL LED MID TREBLE BAS

15、S EX.BASS LOUD JK602 HEADPHONES AMP POWER D+12V F.OFF u-COM CD+B FL FL FILAMENT IC801 J10011007IC1001 IC701 IC301 Q601, IC601 Q612 -32V AVR +8.0V Q607 AC IN DIGITAL OUT JK302 DECK JK601 SPEAKERS JK301 JK101 Q712 MECHA. DECK Q1001- 603 AC5.6V +5.6V Q611 -18.5V +18.5V POWER AMP AVR +12V Q604 FE TE SI

16、RF FFDR FRDR TFDR TRDR SFDR SRDR MDP MD R. D MD T. D Rch-OUT Lch-OUT PB AMP REC AMP DOUT (FCS.TRK.SLD.SFD-DRIVE) +3dB MUTE DECK TUNER AUX CD MD +12V uPD78058GC-B20 MD MECHA. IC501 IC502 CN502 DIGITAL IN (LEVEL SHIFT) TC74HCT7007AF MD MECHA. MDM-98A CONTROL u-COM DSCK RESET PDOWN MD-ST SERCH KDATA U.

17、T.D U.K.D X1 X1 X2 DSTB MDDATA LOAD SW 5.0V 3.3V (5MHz) RXD-M31MD 5 CIRCUIT DESCRIPTION 1. Initialization 1-1 Setting of initial conditions While pressing the SET key, plug the AC power cord into an AC power outlet. 1-2 Initializing operation A microcomputer is initialized for start when the AC powe

18、r is turned on while pressing the SET key. At that time, CD mechanism, MD mechanism and CAS- SETTE mechanism are also initialized. During the initial operation, the display shows “INITIAL- IZE diately. ” and normal indication, after that it goes off imme- 1-3 Initial items and back up data 1-4 Mecha

19、nism initialization 1-4-1 CD mechanism If a mechanism error occurs, “C” is indicated on the display. 1-4-2 MD mechanism The MD ON code is input within 4 seconds after turned the power port on, the MD initial code (D122H) is out- put. If the MD on code is not input, the error indication is displayed

20、as M on the display. 1-4-3 CASSETTE mechanism If a mechanism error occurs, X is indicated on the dis- play. ch Destination K2E2E1/H 1FM97.50MHz FM97.50MHz FM97.50MHz 2FM108.00MHz FM108.00MHz FM 108.00MHz 3AM630kHz AM630kHz AM630kHz 4AM1000kHz AM999kHz AM999kHz 5AM1440kHz AM1440kHz AM1440kHz 6AM1610k

21、Hz AM1602kHz AM1602kHz 7FM87.50MHz FM87.50MHz FM87.50MHz 8FM87.50MHz FM87.50MHz FM87.50MHz 9FM87.50MHz FM87.50MHz FM87.50MHz 10FM89.10MHz FM89.10MHz FM89.10MHz 11FM87.50MHz FM87.50MHz FM87.50MHz 12FM90.00MHz FM90.00MHz FM90.00MHz 13FM106.00MHz FM106.00MHz FM 106.00MHz 14AM530kHz AM531kHz AM531kHz 15

22、FM87.50MHz FM87.50MHz FM87.50MHz 16FM98.00MHz FM98.00MHz FM98.00MHz 17FM98.50MHz FM98.50MHz FM98.50MHz 18FM87.50MHz FM87.50MHz FM87.50MHz 19AM990kHz AM990kHz AM990kHz 20FM97.40MHz FM97.40MHz FM97.40MHz 21FM87.50MHz FM87.50MHz FM87.50MHz 22FM87.50MHz FM87.50MHz FM87.50MHz 23FM87.50MHz FM87.50MHz FM87

23、.50MHz 24FM87.50MHz FM87.50MHz FM87.50MHz 25FM87.50MHz FM87.50MHz FM87.50MHz 26FM87.50MHz FM87.50MHz FM87.50MHz 27FM87.50MHz FM87.50MHz FM87.50MHz 28FM87.50MHz FM87.50MHz FM87.50MHz 29FM87.50MHz FM87.50MHz FM87.50MHz 30FM87.50MHz FM87.50MHz FM87.50MHz 31FM87.50MHz FM87.50MHz FM87.50MHz 32FM87.50MHz

24、FM87.50MHz FM87.50MHz 33FM87.50MHz FM87.50MHz FM87.50MHz 34FM87.50MHz FM87.50MHz FM87.50MHz 35FM87.50MHz FM87.50MHz FM87.50MHz 36FM87.50MHz FM87.50MHz FM87.50MHz 37FM87.50MHz FM87.50MHz FM87.50MHz 38FM87.50MHz FM87.50MHz FML 74.00MHz 39FM87.50MHz FM87.50MHz FML 65.00MHz 40FM87.50MHz FM87.50MHz FML 6

25、9.00MHz 2. TUNER preset frequency ITEMS POWEROFF VOLUME15 BALANCECENTER LOUDNESSOFF AMPEX. BASSON INPUT SELTUNER AUX INPUT0 BASS0 TREBLE0 BANDFM LAST fLIMIT TUNERLAST Pch AUTO/MONOAUTO PchTEST f CLOCKAM 12 : 00 PROG ONAM 12 : 00 CLOCKPROG OFFAM 12 : 00 TIMERPRO MODEPLAY SOURCETUNER Pch1 EXEOFF OTTOF

26、F SLEEPOFF PLAY MODETRACK REPEATOFF CD RANDOMOFF PLAY MODESTOP DIRECTIONFORWARD DECKRVS MODEp OPERATION MODESTOP back up data 4. Main microprocessor M30622MA-198FP (MAIN BOARD IC401) 4-1 Microprocessor periphery block diagram 4-2 Key matrix Vref = 5V Desti- U-COMDiscrimination Receiving frequencyCha

27、nnel nation Desti- DSW4DSW3DSW2 Bandrangespace IFRF nation K, PK1000 FM87.5MHz108.0MHz100kHz+10.7MHz25kHz AM530kHz1700kHz10kHz+450kHz10kHz M, XK2001 FM87.5MHz108.0MHz100kHz+10.7MHz25kHz AM530kHz1610kHz10kHz+450kHz10kHz JJ001 FM76.0MHz108.0MHz100kHz-10.7MHz25kHz AM531kHz1629kHz9kHz+450kHz9kHz E, T E1

28、 110 FM87.5MHz108.0MHz50kHz+10.7MHz25kHz RDSAM531kHz1602kHz9kHz+450kHz9kHz 3. Destination list of TUNER(DSW4=50pin, DSW3=49pin, DSW2=48pin) 0=(input low)1=(input high) IC202 IC801 Q1001 1007 IC301 IC702 IC102 IC103 E TYPE ONLY IC401 CD mechanism Mechanism control circuit Mechanism control circuit Au

29、to reverse cassette mechanism Head amp CXD2587Q CD-DSP TUNER PLL IC LC72131M AUDIO AMP SYSTEM IC (LC75396) MD MDM-98A LED ED1 FL CM1829C Key matrix encoder remocon RDS demodu- lator DOT driver LC75710NE LED driver M30622MA-198FP u-COM DISPLAY BOARD VOLTAGE V RXD-M31MD 6 CIRCUIT DESCRIPTION 4-3 Pin d

30、escription of main microprocessor Pin No.NameI/ODescription 1CEOSYSTEM IC(LC75396)/PLL IC(LC72131)CE 2PLL DOIPLL data input. 3SDITuner SD detector input.H: no tunedL: tuned 4STEREOITuner stereo detetor input.H: monoL: stereo 5EMPHASISONo used. 6RDS DATAIRDS data input.(E/T type only) 7CEIAC off dete

31、ctor input.H: AC onL: AC off 8BYTEIGround. 9CNVSSIGround. 10XCINITimer clock(32.768kHz). 11XCOUTOTimer clock(32.768kHz). 12RESETIU-com reset signal input.H: normalL: reset 13XOUTOMain clock. 14VSS-Ground. 15XINIMain clock. 16VCC-Power supply(+5.0V) 17NMIIPower supply(+5.0V) 18REMOCONIRemocon signal

32、input. 19RDX CLKIRDS clock input.(E/Ttype only) 20SCORISub code synchro signal input. 21CD DC OFFOPower supply control for CD DSP.H: offL: on 22SCLKOCD sense data read out clock. 23SENSEICD sense input. 24CD CLKOCD DSP clock. 25XLATOCD DSP latch output. 26CD DATA OCD DSP data output. 27CD RSTOCD DSP

33、 reset signal output.H: normalL: reset 28SQCKOCD sub code clock. 29SQSOIInput of CD sub code. 30NCONo used. 31FL DATAOData output of FL driver. 32NCONo used. 33FL CLKOClock output of FL driver. 34CD ZD-No used. 35UART1OTransmission data output to MD(UART). 36UART2IData input from MD(UART). 37LCD OCD

34、 laser output control.H: offL: on 38NCONo used. 39MD RSTOMD reset signal output.H: normalL: reset 40CD MONOON/OFF control output of disc monitor.H: onL: off 41NCONo used. 42DM SHORTOSame as CD power signal.H: offL: on 43DOOR SWIInput port of CD door switch.H: openL: close 44,45NCONo used. 46MODELIIn

35、put port of model discrimination. 47DOLBYINo used. 4850CODE24IDiscrimination of tuner destination. 51FL RSTOReset signal output of FL driver. Pin No.NameI/ODescription 52PWX33OControl port of MD CE. 53ENC1IRotary encoder input(vol.A). 54ENC2IRotary encoder input(vol.B). 55LED5OControl port of LED(MD

36、).H: onL: off 56LED4OControl port of LED(CD).H: onL: off 57LED3OControl port of LED(standby,RED).H: offL: on 58LED2OControl port of LED(standby,GRN).H: offL: on 59LED1OControl port of LED(FWD).H: onL: off 60LED0OControl port of LED(RVS).H: onL: off 61FL CEOOutput port of CE(FLdriver). 62VCC-Power su

37、pply. 63NCONo used. 64VSS-Ground. 65A/B-2 6566 HH LH LL REC REC PAUSE,ARM PLAY ODeck activity choise mode. 66A/B-1ODeck activity choise mode. 67CPMODeck motor control.H: onL: off 68SOLODeck solenoid control.H: onL: off 69REC F SWIDeck FWD REC switch input.H: offL: on 70REC R SWIDeck RVS REV switch i

38、nput.H: offL: on 71PACK SWIDeck pack switch input.H: offL: on 72Cro2 SW-No used. 73PLAY SWIDeck play switch input.H: offL: on 74B1/2-No used. 75A120/70-No used. 76BIASODeck bias control.H: onL: off 77NOR-No used. 78REC/PLAY-No used. 79NR/ON-No used. 80S.CLOClock output to system IC/PLL IC. 81PRT MDI

39、MD protection.H: protection on 82FAN H/L-No used. 83FAN ON/OFF-No used. 84A MUTEOAudio muting control.H: offL: on 85CD A MUTEOCD analog muting control.H: onL: off 86TU.MTOTuner muting control.H: onL: off 87PWR07OPower relay control.H: onL: off 88PRT07IDetection port of protection.H: protection on 89

40、91KEY1KEY3IKey A/D input(13). 92,93A/DP1,A/DP2-No used. 94TA.MTOMuting control of DECK.H: onL: off 95RDS SLEVELIRDS S-level input.(E/T type only) 96AVSS-Ground. 97PHOTOIDeck reel detector input. 98VREF-Reference voltage.(no back up) 99AVCC-Power supply.(back up) 100S.DIOData output to system IC/PLL

41、IC. RXD-M31MD 7 CIRCUIT DESCRIPTION Back up power supply (+5V) (MAIN BOARD: IC401) IC501 MAIN u-COM M30622MA-198FP MD_MUTE MUTE AND OR (MAIN u-COM) back up sw MD SUPPLY VOLTAGE CHANGE-OVER TERMINAL MD_RESET MD-ST SEARCHLOAD_IN DSCK K_DATA DSTB MD_DATA uart rxd txd digital in analog L/R in analog L/R

42、 out AD / DA CONVERTER MD CONTROL u-COM DRIVE UNIT MD u-COM RF AMP ENDEC / ATRAC MD mecha. unit (MDM-98A) 2 22 2 2 1 3 1 uPD78058GC-B20 DISPLAY CONTROL RF AMP CONTROL SIGNAL PROCESSING IC CONTROL (TUNER) VOLUME, MUTE CONTROL INPUT SELECTOR CONTROL back up voltage detection 5. Composition (MD section

43、) 5-1 Microprocessor periphery block diagram 6. Test mode 6-1 Test mode of the receiver (1) Setting of the test mode. While pressing the Band key, plug the AC power cord into an AC power outlet. (2) Canceling of the test mode. Unplug an AC power cord. (3) Condition in test mode. POWER ON SELECTOR TU

44、NER BAND FL, LED All the fluorescent display indicate and LEDs light. (The all illuminated state is cleared by pressing any main unit key or remocon key. EX. BASS OFF 5-2 Pin description of MD u-com : UPD78058GC-B20(MD control board, IC501) Pin No.NameI/ODescription 1PDOWNOMDM-98A power down detecto

45、r. 2SEARCHOCD search output. 3LOAD INILoad switch input. 4AVSS-A/D power supply(connected to ground). 5GND-No used. 6NC-No used. 7AVREF1-D/A reference voltage(+5.0V). 8UART2ICommuniation from main u-com(UART RXD). 9UART1OCommuniation to main u-com(UART TXD). 10NC-No used. 11MD DATAIMD IC input data(

46、MDM-98A input data). 12K DATAOMD IC output data(MDM-98A output data). 13DSCKOMD IC clock output(MDM-98A). 14DSTBIStrobe input for MD IC(MDM-98A). 15COMM ANSINo used. 16COMM DININo used. 17COMM DOUTONo used. 18COMM CLKI/ONo used. 19COMM REQONo used. 2031-No used. 326.5/5.0VOChange- over of load volta

47、ge for MD unit. (disc load/eject : H other : L) 33VSS-Ground. 3443-No used. 44INISWIInitial switch input. 4552-No used. 5355GND-No used. 5658NC-No used. 59SRESETONo used. 60RESETIReset signal input. 61GND-No used. 6266-No used. 67CEIDetection signal input of AC OFF. 68VDD-U-com power supply. 69X2-5MHz oscillator. 70X1I5MHz oscillator. 71IC-No used. 72NC-No used. 73GND-No used. 74AVDD-A/D power supply. 75AVREFOIA/D reference voltage. 76BACKUPO Detection signal(A/D) input for back up. (back up : more than 2.2V no back up : less than 2.2V 77AMUTEOAnalog signal input. H :