Kenwood_KMD-671R 维修电路图.pdf

《Kenwood_KMD-671R 维修电路图.pdf》由会员分享，可在线阅读，更多相关《Kenwood_KMD-671R 维修电路图.pdf（17页珍藏版）》请在收音机爱好者资料库上搜索。

1、 2000-1 PRINTED IN JAPAN B51-7580-00(S) 2209 SERVICE MANUAL MD RECEIVER KMD-671R 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 (X9

2、2-3390-00,0-01,X92-3560-00, X92-3580-00:B51-7461-00). SIZE AAA Battery Not supplied as service parts ATT LOUD 12 SCAN MD RECEIVER CDMD-CHANGER CONTROL 34 RDMREP 56 D.SCANM.RDM 45Wx4 TI VOL ADJ MENU AUD CLKNAME.S DISC- AM FM DISC+ PWR OFF SRC PTY L KMD-671R Mounting hardware assy (J21-9491-03) Plasti

3、c cabinet assy (A02-1486-13) Stay (J54-0606-04) : M type only Lever (D10-3031-04) x2 Antenna adaptor (T90-0523-05) : E type only DC cord (E30-4790-05) : E type only DC cord (E30-4785-05) : M type only Screw set (N99-1610-15) : M type only Screw set (N99-1632-05) : M type only Escutcheon (B07-2181-02

4、) Front glass (B10-3117-01) Panel assy (A64-1881-02) Remote controller assy (A70-0883-05): M type only 收音机爱好者资料库 Ra d i o Fa n s .CN BLOCK DIAGRAM KMD-671R 2 A8V SW5V UP BACK and E-VOL MPX CH MD AM FM VDD QUAL LEVEL MP IN IC2 Q21,22 MUTE MUTE DRIVER Q19,20 IC8, Q23 200mV 170mV 1200mV 1200mV BUFF Q29

5、 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 AMP NOISERDS DECODER IC10 u-COM IC1 IC7,Q33 RST L DATAS L CLK L DATAL REMO PANEL Q24 BU5V PAN 5V SW

6、 PANEL IC2 PAN 5V RST SW (X13) IC1 REMOTE CONTROL WITH LCD DRIVER KEY MATRIX LCD ILL. SW SW5V PAN 5V MD SERVO AVR IC6 A.8V AVR IC3,Q5 A.8V AVR ON/OFF SW Q3,4 ILLUMI AVR Q7-9 KMD-671R(M,E) P-CON BACK UP BU5V SW5VBU5V Q1,2 P-CON Q13-16 SP-OUT TEL-MUTE ACC PROTECTION THERMAL POWER IC SVR SW 3529mV AM F

7、M 773mV 1258mV CD-CH MD 3529mV PRE OUT IC4 MUTE SDA SCL PHONETEL-MUTE Q18 ACC DET.ACC DET. SVR BU DET. DSI Q10 Q17 BU DET. Q34 DSI SDA SCL Q30-32 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 P-ANT SW5VBU5V VLCD AVR Q4 Q2,3 KMD-671R(E) A1

8、 Q25,26TUNER SCL SDA CONTENTS BLOCK DIAGRAM . 2 COMPONENT DESCRIPTION . 3 MICROCOMPUTERS DESCRIPTION. 4 ADJUSTMENT . 6 PC BOARD . 7 SCHEMATIC DIAGRAM . 11 EXPLODED VIEW . 17 PARTS LIST. 18 SPECIFICATIONS .Back cover 收音机爱好者资料库 Ra d i o Fa n s .CN KMD-671R 3 COMPONENT DESCRIPTION G SWITCH UNIT(X13-970

9、2-71) Ref.No.Component NameApplication/FunctionOperation/Condition/Compatibility IC1LC75808WLCD driver with key-matrix IC2RS-171Remote control light sensor Q1DTA114EKorUN2111Key-matrix permission SWReady on key-matrix, ON when the base goes “Lo”. Q22SD2114KIllumination SW(Red)ON when the base goes “

10、Hi”. Q32SD2114KIllumination SW(Green)ON when the base goes “Hi”. Q42SC2412Kor2SD601ALCD AVR G ELECTRIC UNIT(X25-845X-XX) Ref.No.Component NameApplication/FunctionOperation/Condition/Compatibility IC1UPD784216GF520System MI-COM. IC2TDA7400DE-VOL. & N.C. MPX IC3M5237MLAVR ICIC is combined with Q5, and

11、 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”:detection voltage below 3.0V IC8HD74HC27FPMute logic3 input NOR gate x3 IC10TDA7479DRDS decoder Q12SC4081or2SD1

12、819ABU 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”. Q52SB1565F(E,F)Audio 8V AVROutput voltage 8.3V Q6DTC144EKorUN2213orKRC104SMD SERVO

13、 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”. Q132SB1277(Q,R)P-CON SWQ13 is turned ON when Q16s base goes “Hi”. Q16DTC114YKorUN2214orKRC1

14、07S 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(Momentary powerON when the base goes “Hi” during BU applied. down detection) Q182SC2412Kor2SD601

15、AACC 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 base goes “Hi”. Q21DTC143TKorUN2216Audio mute SWAudio pre-outs are muted when the base

16、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. Q25DTC124EKorUN2212orKRC103SFM+B SWQ26 is turned ON when Q25s base goes “Hi”. Q262SB1277(Q,R)ON durin

17、g FM reception Q27DTC124EKorUN2212orKRC103SAM+B SWQ28 is turned ON when Q27s base goes “Hi”. Q282SB1277(Q,R)ON during AM reception Q292SC4081or2SD1819AComposite signal output buffer Q302SC4081or2SD1819ANoise buffer Q31DTC114TKorUN2215AFC time constant SWOFF during FM seek, ON during FM reception Q32

18、DTA124EKorUN2112orKRA103SQ31 is turned OFF when Q32s emitter goes “Lo”. Q33DTC144EKorUN2213orKRC104SRESET SWSystem RESET is activated when the panel reset SW is pushed. Q342SC4081or2SD1819ADSI driverON when the base goes “Hi”. 收音机爱好者资料库 Ra d i o Fa n s .CN KMD-671R 4 MICROCOMPUTERS DESCRIPTION G Ter

19、minal Description Pin No.Pin NameI/ODescriptionProcessing Operation 1TYPE 0IDestination type input terminal 0Pull up to BU 5V lines 2TYPE 1IDestination type input terminal 1Pull down to GND 3N.C.ONot used 4N.C.ONot used 5N.C.ONot used 6N.C.ONot used 7N.C.ONot used 8N.C.ONot used 9VDD-VDD connection

20、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” temporarily. 12N.C.ONot used 13P-MUTEOPower IC mute control“Lo”: Mute 14ANT-CONOA

21、ntenna 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 input from the remote control light sensor 20P-ONOA.8V AVR ON/OFF contr

22、ol 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/output with the E-VOL. IC 24MUTEOMute control output“Hi”: Mute ON, “Lo”: Mu

23、te 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 the F/E(tuner) 29CHCONOChanger control“Lo”: Standby, “Hi”: during the mov

24、ement 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 terminal“Hi”: DSI LED ON 34N.C.ONot used 35N.C.ONot used 36MD+BOMD servo +B ON/OFF control terminal“Hi”: MD source is

25、 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 41XT2-Sub clock resonator connection terminal 42XT1ISub clock reson

26、ator connection terminal 43RESETIReset input terminal“Lo”: System reset 44N.C.ONot used 45R-CLKIClock input from RDS decoder 46REQ CIRequest input from changers“Hi”: Request 47KEY-REQIKey request terminal“Lo”: Request 48N.C.ONot used 49LOS-SWIMD insertion detection terminal“Lo”: MD insertion detecte

27、d 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 referenceConnected to BU 5V lines voltage input) 53PHONEIPHONE detection input1V or less: TEL MUTE,

28、2.5V or greater: NAVI MUTE 54N.C.INot usedConnected to GND 55NIOSEINoise detection input 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 from the MI-COM. of MD mecha.“Lo”: Mute requested

29、 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 CIData input from changers 66DATA HOData output t

30、o 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”: during the movement 72BEEPOBEEP sound output 73N.

31、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) 78LOADOMD mecha. Loading/Eject switching output term

32、inalLoading : (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 detached 82N.C.ONot used 83N.C.ONot used 84QUALIQu

33、ality input from RDS decoder 85R-DATAIData input from RDS decoder 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 used 91N.C.ONot used 92 AFC ONoise detection time constant switching terminal“Lo”: During FM seek,

34、“Hi”: During FM reception 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 1IIC2 stereo data setting terminal“Lo”: Initial value 100VSS-G

35、round connection terminalConnected to GND KMD-671R 5 KMD-671R 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 of test mode. 2. To release test mode Simply reset the u

36、nit. (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 as the beginning) Pressing the “Track Down” key jumps to

37、 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 becomes OFF regardless of the functional excuse, too. The BA

38、SS / 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 for the Audio mode feed. Pin No.Pin NameI/ODescriptionP

39、rocessing 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) 53PHONEIPHONE detection input1V or less: TEL MUTE, 2.5V or greater: NAVI MUTE 54N.C.INot usedConnected to GND 55

40、NIOSEINoise detection input 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 from the MI-COM. of MD mecha.“Lo”: Mute requested 61AVSS-Ground connection terminal(A/D, D/A converter)Connect

41、ed 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 CIData input from changers 66DATA HOData output to changers 67CH-CLKI/OClock input/output with changers 68L-DA

42、TALIData 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”: during the movement 72BEEPOBEEP sound output 73N.C.ONot used 74N.C.ONot used 75N.C.ONot used 76LOE-SWIMD loadi

43、ng 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) 78LOADOMD mecha. Loading/Eject switching output terminalLoading : (EJECT, LOAD)=(Lo, Hi) Brake: (EJECT, LOAD)=(Hi

44、, 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 detached 82N.C.ONot used 83N.C.ONot used 84QUALIQuality input from RDS decoder 85R-DATAIData input from RDS dec

45、oder 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 used 91N.C.ONot used 92 AFC ONoise detection time constant switching terminal“Lo”: During FM seek, “Hi”: During FM reception 93N.C.ONot used 94N.C.ONot used 95N

46、.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 1IIC2 stereo data setting terminal“Lo”: Initial value 100VSS-Ground connection terminalConnected to GND KMD-671R 5 KMD-671R

47、 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 of test mode. 2. To release test mode Simply reset the unit. (NOTE) The test mode is not canceled by ACC OFF, power O

48、FF, 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 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 tra