Kenwood-KMD-42-Service-Manual 电路图 维修手册.pdf

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1、 2000-1 PRINTED IN JAPAN B51-7579-00(S) 1474 SERVICE MANUAL MD RECEIVER KMD-42 G This service manual does not include information on the MD mechanism assembly (explodedview, parts list, schematic diagram or mechanism description). For such information, refer to the MD mechanism assembly manual (X92-

2、3390-00, 0-01, X92-3560-00, X92-3580-00 : B51-7461-00). FM Escutcheon (B07-2181-02) Front glass (B10-3116-01) Panel assy (A64-1880-02) SRC DISC+ PWR OFF KMD-42 MENU AUD AM DISC- AUTOCLKAMENAME.S SCANRDMREPD.SCANM.RDM MD RECEIVER CDMD-CHANGER CONTROL45Wx4 LOUD ATT 123456 Mounting hardware assy (J21-9

3、491-03) Plastic cabinet assy (A02-1486-13) Lever (D10-3031-04) x2 Screw set (N99-1610-15) Screw set (N99-1632-05) Stay (J54-0606-04) DC cord (E30-4783-05) RadioFans.CN 收音机爱 好者资料库 BLOCK DIAGRAM KMD-42 2 Q25,26 A8V UP BACK TUNER and E-VOL MPX CH MD AM FM VDD QUAL LEVEL MP IN IC2 Q21,22 MUTE MUTE DRIVE

4、R Q19,20 IC8, Q23 380mV 170mV 1200mV 1200mV FM+B AM+B Q27,28 TUN5V AUDIO OUT VDD 5V IF1/IF2/PLL+B AM+B FM+B S-METER SD ANT S 5.0V A8V BU5V LOAD LOE SW LOS SW MD EJECT M STOP M RST M MUTE M DATA M CLK BU5V R CLK R DATA QUAL NOISE AFC SD S-METER u-COM IC1 IC7,Q33 RST L DATAS L CLK L DATAL REMO PANEL Q

5、24 BU5V PAN 5V SW PANEL IC2 PAN 5V RST SW (X13) IC1 REMOTE CONTROL WITH LCD DRIVER KEY MATRIX LCD SW5V PAN 5V MD SERVO AVR IC6 A.8V AVR IC3,Q5 A.8V AVR ON/OFF SW Q3,4 ILLUMI AVR Q7-9 P-CON/ANT-CON BACK UP SW5VBU5V Q1,2 P-CON Q13-16 SP-OUT ACC PROTECTION THERMAL POWER IC SVR SW 3529mV AM FM 547mV 169

6、2mV CD-CH MD 3529mV PRE OUT IC4 MUTE SDA SCL PHONE Q18 ACC DET.ACC DET. SVR BU DET. DSI Q10 Q17 BU DET. SDA SCL S MUTE MP OUT RST DATA C REQ H CH-CON DATA H REQ C CLK MUTE CH L INH L CE SERVO AVR ON/OFF SW Q6 S 5.0V A8V VLCD AVR Q4 SW5VBU5V A1 SCL SDA CONTENTS BLOCK DIAGRAM . 2 COMPONENT DESCRIPTION

7、 . 3 MICROCOMPUTERS DESCRIPTION. 4 ADJUSTMENT . 6 PC BOARD . 7 SCHEMATIC DIAGRAM . 11 EXPLODED VIEW . 17 PARTS LIST. 18 SPECIFICATIONS .Back cover RadioFans.CN 收音机爱 好者资料库 KMD-42 3 COMPONENT DESCRIPTION G SWITCH UNIT(X13-9700-11) Ref.No.Component NameApplication/FunctionOperation/Condition/Compatibil

8、ity IC1LC75808WLCD driver with key-matrix IC2RS-171Remote control light sensor Q1DTA114EKorUN2111Key-matrix permission SWReady on key-matrix, ON when the base goes “Lo”. Q42SC2412Kor2SD601ALCD AVR G ELECTRIC UNIT(X25-8450-11) Ref.No.Component NameApplication/FunctionOperation/Condition/Compatibility

9、 IC1UPD784216GF520System MI-COM. IC2TDA7400DE-VOL. & N.C. MPX IC3M5237MLAVR ICAVR IC is combined with Q5, and it works as the error detection, the driver. IC4TDA7386Power IC IC6LM2595S-5.0MD SERVO AVROutput voltage 5.0V fixation. A DC/DC Converter with the ON/OFF function. IC7PST9130NRReset IC“L”:de

10、tection voltage below 3.0V IC8HD74HC27FPMute logic3 input NOR gate x3 Q12SC4081or2SD1819ABU 5V AVRInverted darlington connection Q22SB1565F(E,F)On during BU applied. Q3DTA124EUAorUN5112Audio 8V AVR ON/OFF SWAudio 8V AVR ON/OFF control Q4DTC144EKorUN2213orKRC104SQ3 is turned ON when Q4s base goes “Hi

11、”. Q52SB1565F(E,F)Audio 8V AVROutput voltage 8.3V Q6DTC144EKorUN2213orKRC104SMD SERVO AVR ON/OFF SWAVR IC is activated when Q6s base goes “Hi”. Q7DTC144EUAorUN5213Illmination AVRAVR output is ON when Q7s base goes “Hi”. Q8DTA124EUAorUN5112 Q92SD1760 Q102SA1036KSW 5VON when the base goes “Lo”. Q132SB

12、1277(Q,R)P-CON SWQ13 is turned ON when Q16s base goes “Hi”. Q16DTC114YKorUN2214orKRC107S Q142SA1037KP-CON protectionProtect Q13 by turning ON when P-CON output is grounded. Q15DTA124EKorUN2112orKRA103SPrevents Q14 tuning ON during start-up after power ON. Q172SC2412Kor2SD601ABU detection(MomentaryON

13、 when the base goes “Hi” during BU applied. power down detection) Q182SC2412Kor2SD601AACC detectionON when the base goes “Hi” during ACC applied. Q19DTA124EKorUN2112orKRA103SMute driver for Audio mute SWON when the base goes “Lo”. Q20DTC144EKorUN2213orKRC104SE-VOL. mute SWE-VOL. is muted when the ba

14、se goes “Hi”. Q21DTC143TKorUN2216Audio mute SWAudio pre-outs are muted when the base goes “Hi”. Q22DTC143TKorUN2216 Q23DTC114YKorUN2214orKRC107SSVR SWPOWER IC RESET is activated when the base goes “Hi”. Q242SA1576APanel detection SWON when the base goes “Lo” during the panel closed. Q25DTC124EKorUN2

15、212orKRC103SFM+B SWQ26 is turned ON when Q25s base goes “Hi”. Q262SB1277(Q,R)ON during FM reception Q27DTC124EKorUN2212orKRC103SAM+B SWQ28 is turned ON when Q27s base goes “Hi”. Q282SB1277(Q,R)ON during AM reception Q33DTC144EKorUN2213orKRC104SRESET SWSystem RESET is activated when the panel reset S

16、W is pushed. RadioFans.CN 收音机爱 好者资料库 KMD-42 4 MICROCOMPUTERS DESCRIPTION G Terminal Description Pin No.Pin NameI/ODescriptionProcessing Operation 1TYPE 0IDestination type input terminal 0Pull down to GND 2TYPE 1IDestination type input terminal 1Pull down to GND 3N.C.ONot used 4N.C.ONot used 5N.C.ONo

17、t used 6N.C.ONot used 7N.C.ONot used 8N.C.ONot used 9VDD-VDD connection terminalConnected to BU 5V lines 10STBYOPower IC standby control output“Hi”: POWER ON mode 11SVROPower IC reset terminalWhen the momentary power down, after ACC OFF is detected and after POWER OFF, the output goes “Hi” temporari

18、ly. 12N.C.ONot used 13P-MUTEOPower IC mute control“Lo”: Mute 14ANT-CONOAntenna control“Hi”: during FM/AM reception 15IC2-SCKOClock output to the E-VOL. IC 16N.C.ONot used 17P-CONOPower control“Hi”: POWER ON mode except ALL OFF mode 18ACC-DETIACC detection input“Hi”: ACC OFF, “Lo”: ACC ON 19REMOIData

19、 input from the remote control light sensor 20P-ONOA.8V AVR ON/OFF control terminal“Hi”: POWER ON mode or during MD Loading/ Eject 21 BU-DET IMomentary power down detection input“Hi”: When momentary power down detected or BU OFF, “Lo”: BU ON 22TSET-Not usedConnected to GND 23IC2-SDAI/OData input/out

20、put with the E-VOL. IC 24MUTEOMute control output“Hi”: Mute ON, “Lo”: Mute OFF 25SW5OSW 5V control“Lo”: POWER ON mode or during MD Loading/ Eject 26M-CLKI/OClock input/output with the MI-COM. of MD mecha. 27M-DATAI/OData input/output with the MI-COM. of MD mecha. 28IC3-SDAI/OData input/output with t

21、he F/E(tuner) 29CHCONOChanger control“Lo”: Standby, “Hi”: during the movement 30IC3-SCKOClock output to the F/E(tuner) 31 REQ H ORequest output to changers“Lo”: Request 32ILL-ONOIllumination AVR ON/OFF control terminal“Hi”: POWER ON mode 33DSIODSI output terminalNot used 34N.C.ONot used 35N.C.ONot u

22、sed 36MD+BOMD servo +B ON/OFF control terminal“Hi”: MD source is selected or during MD Loading /Eject. 37VDD-VDD connection terminalConnected to BU 5V lines 38X2-Main clock resonator connection terminal 39X1IMain clock resonator connection terminal 40VSS-Ground connection terminalConnected to GND 41

23、XT2-Sub clock resonator connection terminal 42XT1ISub clock resonator connection terminal 43RESETIReset input terminal“Lo”: System reset 44N.C.ONot used 45R-CLKIClock input from RDS decoderNot used(pull down to GND) 46REQ CIRequest input from changers“Hi”: Request 47KEY-REQIKey request terminal“Lo”:

24、 Request 48N.C.ONot used 49LOS-SWIMD insertion detection terminal“Lo”: MD insertion detected System -com : UPD784216GF520 Pin No.Pin NameI/ODescriptionProcessing Operation 50N.C.ONot used 51AVDD-VDD connection terminalConnected to BU 5V lines 52AVREF 0-VDD connection terminal(A/D converter reference

25、Connected to BU 5V lines voltage input) 53PHONEIPHONE detection inputNot used(pull down to GND) 54N.C.INot usedConnected to GND 55NIOSEINoise detection inputNot used(pull down to GND) 56S-METERIS-meter input from the F/E(tuner) 57N.C.INot usedConnected to GND 58N.C.INot usedConnected to GND 59N.C.IN

26、ot usedConnected to GND 60M-MUTEIMute request from the MI-COM. of MD mecha.“Lo”: Mute requested 61AVSS-Ground connection terminal(A/D, D/A converter)Connected to GND 62N.C.ONot used 63M-RSTOReset output to the MI-COM. of MD mecha.“Lo”: Reset 64AVREF 1-VDD connection terminal(D/A converter referenceC

27、onnected to BU 5V lines voltage input) 65DATA CIData input from changers 66DATA HOData output to changers 67CH-CLKI/OClock input/output with changers 68L-DATALIData input from the LCD driver IC 69L-DATASOData output to the LCD driver IC 70L-CLKOClock output to the LCD driver IC 71M-STOPOStop request

28、 to the MI-COM. of MD mecha.“Lo”: Stop, “Hi”: during the movement 72BEEPOBEEP sound output 73N.C.ONot used 74N.C.ONot used 75N.C.ONot used 76LOE-SWIMD loading complete detection SW input terminal“Lo”: MD loading completion 77EJECTOMD mecha. Loading/Eject switching output terminalStandby : (EJECT, LO

29、AD)=(Lo, Lo) Eject: (EJECT, LOAD)=(Hi, Lo) 78LOADOMD mecha. Loading/Eject switching output terminalLoading : (EJECT, LOAD)=(Lo, Hi) Brake: (EJECT, LOAD)=(Hi, Hi) 79L-INHOINH output to the LCD driver IC“Hi”: Active, “Lo”: LCD indication OFF 80L-CEOCE output to the LCD driver IC“Hi”: Active 81PANELIPa

30、nel detaching detection input“Lo”: Panel not detached 82N.C.ONot used 83N.C.ONot used 84QUALIQuality input from RDS decoderNot used(pull down to GND) 85R-DATAIData input from RDS decoderNot used(pull down to GND) 86N.C.ONot used 87N.C.ONot used 88SDISD input from the F/E(tuner)“Hi”: Station detected

31、, “Lo”: Not detected 89N.C.ONot used 90N.C.ONot used 91N.C.ONot used 92 AFC ONoise detection time constant switching terminalNot used 93N.C.ONot used 94N.C.ONot used 95N.C.ONot used 96AM+BOAM+B control“Hi”: during AM reception 97FM+BOFM+B control“Hi”: during FM reception 98ST TYPE 0IIC2 stereo data

32、setting terminal“Lo”: Initial value 99ST TYPE 1IIC2 stereo data setting terminal“Lo”: Initial value 100VSS-Ground connection terminalConnected to GND KMD-42 5 KMD-42 6 MICROCOMPUTERS DESCRIPTIONADJUSTMENT TEST MODE 1. To enter test mode While holding the “FM” key and preset “6” key, reset the unit.

33、All indication segments are ON at the beginning of test mode. 2. To release test mode Simply reset the unit. (NOTE) The test mode is not canceled by ACC OFF, power OFF, momentary power down. 3. MD receiver test mode specification Pressing the “Track Up” key jumps between tracks in the following orde

34、r. No.7 No.2 No.13 No.23 No.30 No.34 No.7 (Same as the beginning) Pressing the “Track Down” key jumps to the previous track to the being played. Pressing the preset “1” key jumps to No.28 track. Again pressing the preset “1” key jumps to No.22 track. 4. Audio adjustment The volume is set to -10dB (w

35、hich is shown as 30). Loudness is OFF. CRSC becomes OFF regardless of the functional excuse, too. The BASS / TREBLE and BALANCE / FADER controls can be set to the full boost / full cut and full front / full rear and full right / full left respectively by pressing the “Track Up” / “Track Down” keys.

36、Sound coordination(Kex / ec4 / dB) doesnt appear for the Audio mode feed. Pin No.Pin NameI/ODescriptionProcessing Operation 50N.C.ONot used 51AVDD-VDD connection terminalConnected to BU 5V lines 52AVREF 0-VDD connection terminal(A/D converter referenceConnected to BU 5V lines voltage input) 53PHONEI

37、PHONE detection inputNot used(pull down to GND) 54N.C.INot usedConnected to GND 55NIOSEINoise detection inputNot used(pull down to GND) 56S-METERIS-meter input from the F/E(tuner) 57N.C.INot usedConnected to GND 58N.C.INot usedConnected to GND 59N.C.INot usedConnected to GND 60M-MUTEIMute request fr

38、om the MI-COM. of MD mecha.“Lo”: Mute requested 61AVSS-Ground connection terminal(A/D, D/A converter)Connected to GND 62N.C.ONot used 63M-RSTOReset output to the MI-COM. of MD mecha.“Lo”: Reset 64AVREF 1-VDD connection terminal(D/A converter referenceConnected to BU 5V lines voltage input) 65DATA CI

39、Data input from changers 66DATA HOData output to changers 67CH-CLKI/OClock input/output with changers 68L-DATALIData input from the LCD driver IC 69L-DATASOData output to the LCD driver IC 70L-CLKOClock output to the LCD driver IC 71M-STOPOStop request to the MI-COM. of MD mecha.“Lo”: Stop, “Hi”: du

40、ring the movement 72BEEPOBEEP sound output 73N.C.ONot used 74N.C.ONot used 75N.C.ONot used 76LOE-SWIMD loading complete detection SW input terminal“Lo”: MD loading completion 77EJECTOMD mecha. Loading/Eject switching output terminalStandby : (EJECT, LOAD)=(Lo, Lo) Eject: (EJECT, LOAD)=(Hi, Lo) 78LOA

41、DOMD mecha. Loading/Eject switching output terminalLoading : (EJECT, LOAD)=(Lo, Hi) Brake: (EJECT, LOAD)=(Hi, Hi) 79L-INHOINH output to the LCD driver IC“Hi”: Active, “Lo”: LCD indication OFF 80L-CEOCE output to the LCD driver IC“Hi”: Active 81PANELIPanel detaching detection input“Lo”: Panel not det

42、ached 82N.C.ONot used 83N.C.ONot used 84QUALIQuality input from RDS decoderNot used(pull down to GND) 85R-DATAIData input from RDS decoderNot used(pull down to GND) 86N.C.ONot used 87N.C.ONot used 88SDISD input from the F/E(tuner)“Hi”: Station detected, “Lo”: Not detected 89N.C.ONot used 90N.C.ONot

43、used 91N.C.ONot used 92 AFC ONoise detection time constant switching terminalNot used 93N.C.ONot used 94N.C.ONot used 95N.C.ONot used 96AM+BOAM+B control“Hi”: during AM reception 97FM+BOFM+B control“Hi”: during FM reception 98ST TYPE 0IIC2 stereo data setting terminal“Lo”: Initial value 99ST TYPE 1I

44、IC2 stereo data setting terminal“Lo”: Initial value 100VSS-Ground connection terminalConnected to GND KMD-42 5 KMD-42 6 MICROCOMPUTERS DESCRIPTIONADJUSTMENT TEST MODE 1. To enter test mode While holding the “FM” key and preset “6” key, reset the unit. All indication segments are ON at the beginning

45、of test mode. 2. To release test mode Simply reset the unit. (NOTE) The test mode is not canceled by ACC OFF, power OFF, momentary power down. 3. MD receiver test mode specification Pressing the “Track Up” key jumps between tracks in the following order. No.7 No.2 No.13 No.23 No.30 No.34 No.7 (Same

46、as the beginning) Pressing the “Track Down” key jumps to the previous track to the being played. Pressing the preset “1” key jumps to No.28 track. Again pressing the preset “1” key jumps to No.22 track. 4. Audio adjustment The volume is set to -10dB (which is shown as 30). Loudness is OFF. CRSC beco

47、mes OFF regardless of the functional excuse, too. The BASS / TREBLE and BALANCE / FADER controls can be set to the full boost / full cut and full front / full rear and full right / full left respectively by pressing the “Track Up” / “Track Down” keys. Sound coordination(Kex / ec4 / dB) doesnt appear

48、 for the Audio mode feed. ELECTRIC UNIT PC BOARD (Component Side View) ABCDEFGIH 1 2 3 4 5 6 7 SWITCH UNIT Refer to the schematic diagram for the values of resistors and capacitors. C89C88 R126 R125 R124 R123 R122 R121 R120 R119 R118 C83 C61 C77 C70 R150 R151 R152 C39 R146 C38 R147 C41 R93 C40 C60 C59 C74 R32 R143 R141 C71 C75 C73C72 W8 R106 R108 R101 R129 R127 R133 R134 R137 R135