Kenwood-MDXG3-cs-sm 电路图 维修手册.pdf

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1、70% MD PERSONAL STEREO SYSTEM MDX-G3 SERVICE MANUAL 2001-1/B51-5697-00 (K/K) 329 APE T Dressing panel (A21-3897-03): L (A21-3926-03): SR Arm (D10-3983-04) Handle (K01-0127-03): L (K01-0143-03): SR Knob assy (K29-7870-04): L (K29-7918-04): SR Panel assy (A60-1975-11): L (A60-1982-11): S (A60-1986-11)

2、: R In compliance with Federal Regulations, following are repro- duction of labels on, or inside the product relating to laser product safety. KENWOOD-Crop. certifies this equipment conforms to DHHS Regulations No.21 CFR 1040. 10, Chapter 1, subchapter J. DANGER : Laser radiation when open and inter

3、lock defeat- ed. AVOID DIRECT EXPOSURE TO BEAM. L: BLUE, S: SILVER, R: RED Note:Please contact KENWOOD service in your side if you want to get the AC power cord. Plastic cabinet assy (A02-2996-01) Miniature phone jack (E11-0399-05) Rod antenna (T90-0828-05) Miniature phone jack (E11-0399-05) AC inle

4、t (E03-0374-05) RadioFans.CN 收音机爱 好者资料库 POWER cord (1) (E30-2927-05) Remote control unit (1) Battery cover (A09-1151-08) (A70-1449-05) Batteries(R6/AA) for remote (2) AM loop antenna (1) (T90-0865-05) MDX-G3 2 CONTENTS / ACCESSORIES / CAUTIONS CONTENTS / ACCESSORIES / CAUTIONS. 2 EXTERNAL VIEW.3 DIS

5、ASSEMBLY FOR REPAIR.4 CIRCUIT DESCRIPTION.5 ADJUSTMENT.10 WIRING DIAGRAM.12 PC BOARD . 13 SCHEMATIC DIAGRAM . 16 EXPLODED VIEW .29 PARTS LIST.31 SPECIFICATIONS .39 Contents Accessories Operation to reset The microcomputer may fall into malfunction when a cord is unplugged and plugged again while the

6、 unit is ON or due to an external cause. In such a case, the microcomputer should be reset as described below: Unplug the power cord from the wall outlet and, while holding the POWER key depressed, plug the power cord again. This initializes the microcomputer. Note that this clears the previously st

7、ored memory. Note related to transportation and move- ment Before transporting or moving this unit, carry out the following oper- ations. 1. Remove the CD or MD from the unit. 2. Press the MD 6 key. 3. Wait for some time and verify that the display becomes as shown in the figure. 4. Press the CD 6 k

8、ey. 5. Wait for some time and verify that the display becomes as shown in the figure. 6. Wait a few seconds and turn the unit off. Memory backup function Stored contents which are cleared immediately when power plug is unplugged from power outlet. - Clock display(Backed up for 3 min.) Stored content

9、s which are cleared in at least a day after power plug is unplugged from power outlet. Amplifier section - Input selection - Volume control value - AUX input level - Tone control levels - Timer setting contents Tuner section - Receiving band - Frequency - Preset stations - Auto tuning setting Casset

10、te deck - Tape transport direction - Tape equalizer - Tape reverse mode MD recorder - Recording mode - Recording speed Cautions RadioFans.CN 收音机爱 好者资料库 MDX-G3 3 EXTERNAL VIEW CD/MD HIGH SPEED DUBBING SYSTEMCD/MD HIGH SPEED DUBBING SYSTEM 1 B I T D U A L D / A C O N V E R T E R 1 B I T D U A L D / A

11、C O N V E R T E R Rod antenna (T90-0828-05) Top cover assy (A52-0920-21): L (A52-0922-21): S (A52-0924-21): R RadioFans.CN 收音机爱 好者资料库 MDX-G3 4 DISASSEMBLY FOR REPAIR SP CONNECTOR X09 (G/7) -CN502 X28-CN1 1 1 1 1 2 1 1 2 2 x3 FRONT SIDE 4 3 3 3 5 4 4 FRONT SIDE FRONT SIDE FRONT SIDE x3 1. How to Remo

12、ve Front Panel 1. Remove 6 screws(1) from the rear side. 2. Remove 2 screws(2) from the bottom side. 3. Slide the front panel frontwards and pull out the connec- tors and FPC. 4. Remove the front panel from the rear cabinet. 2. How to Remove Top Panel 1. Remove 3 screws(3) from rear side. 2. Remove

13、3 screws(4) from top side. 3. Remove 3 screws(5). 4. Lift the top cover. Note: You need to pull out FPC on the rear side of top cover. MDX-G3 5 CIRCUIT DESCRIPTION 4. Microprocessor : MN101C49KLA(X09,IC11) 4-1 Microprocessor Periphery Block Diagram 1. Initializing 1-1 Initialization Method While pre

14、ssing the POWER key, turn the AC on. 1-2 Initialization Operation During the initial operation, the display shows INITIAL- IZE and after that it will be retuned to standby condi- tion. If any mechanisms error occurred, the error indication is displayed as ERR on the display. 1-3 Mechanism Initializa

15、tion 1 CD Mechanism If a mechanism error occurred, the error indication is displayed as C ERR on the display. 2 Deck Mechanism If a mechanism error occurred, the error indication is displayed as T ERR on the display. 3 MD Mechanism If a mechanism error occurred, the error indication is displayed as

16、M ERR on the display. The disc will be unloaded from MD mechanism auto- matically, if a disc is its in. P.CH BandFrequencyP.CHBandFrequency 1FM98.30MHz16FM98.00MHz 2FM87.50MHz17FM98.50MHz 3FM108.00MHz18FM87.50MHz 4FM89.10MHz19AM990kHz 5FM90.00MHz20FM97.70MHz 6FM87.50MHz21AM531kHz 7FM87.50MHz22FM87.5

17、0MHz 8FM87.50MHz23FM87.50MHz 9AM1602kHz24FM87.50MHz 10AM999kHz25FM87.50MHz 11AM630kHz26FM87.50MHz 12AM1440kHz27FM87.50MHz 13FM106.0MHz28FM87.50MHz 14AM531kHz29FM108.0MHz 15FM87.50MHz30AM945kHz Set Destin- Band Receiving Channel IFRF ationFrequecy RangeSpace ME1FM87.5MHz108.0MHz50kHz+10.7MHz25kHz ME1

18、AM531kHz1602kHz9kHz+450kHz9kHz 2. Tuner Destination 3. Tuner Preset Frequency X28,IC1 6 3 4 5 51 X09,ED501 X09,IC1 2 X09,IC21 MN101C49KLA X09,IC22 X09,IC32 6 3 3 3 2 2 KEY1,2X09,A501 X09,S517 DECK MECHA. (ADR-2176TR3) DECK SYSTEM IC DOT DRIVER (M66004-001FPG) Vaccume Fluorescent Display (HNA-16MM30T

19、) ENCODERREMOTEKEY MD MECHA MDM-07 SYSTEM IC (M61510FP) CD MECHA (KSM213CDM) PLL IC (LC72131) DSP IC (MN662748RPMFA) MDX-G3 6 CIRCUIT DESCRIPTION 4-2 Key MatrixInput Voltage Value : 4.6V Input Voltage(V)KEY2(Pin7)KEY1(Pin8) 0.000.45POWERBEST HITS 0.431.10SOUNDMD REC 1.131.78AUXTAPE REC 1.812.37SKIP

20、DOWNTUNER 2.412.80SKIP UPCD PLAY/PAUSE 2.843.25STOPMD PLAY/PAUSE 3.293.68MD EJECTTAPE PLAY 3.724.22MENUSET/DEMO 4.244.60KEY OFFKEY OFF 4-3 Voltage Value of Control Port 1 Deck Reel Pulse Input Voltage(V)Active 0.001.94LOW 1.952.91- 2.924.6HIGH 2 Tuner Destination(Pin3) Input Voltage(V)Type 0.002.50J

21、(Japan) 2.514.6M(Asia) 3 Voltage Protection(Pin4) Input Voltage(V)Protection 0.002.50ON 2.514.6OFF 4 CD Protection(Pin5) Input Voltage(V)Protection 0.001.49ON 1.503.49OFF 3.504.6ON Port No.Port NameI/ODescription Active HL 1GNDConnected to ground. 2PHOTOIDeck reel sensor input. 3TYPEIDiscrimination

22、of tuner destination. 4PROTECTIONIDetection port for power supply protection. 5CD PROTECTIDetection port for CD protection. 6MD BACKVIDetection port for MD back up voltage. 7,8KEY2,KEY1IA/D key (1,2) input. 9KEY3Unused. 10VREF+A/D reference voltage input for the A/D converter. 11VDDPower supply inpu

23、t (+5V). 12OSC2OMain clock output (8.38MHz). 13OSC1IMain clock input (8.38MHz). 14GNDConnected to ground. 15XIITimer clock input (32kHz). 16XOOTimer clock output (32kHz). 17GNDConnected to ground 18MD TXDOMD communication TX (to mecha. u-com RX). 19MD RXDIMD communication RX (to mecha. u-com TX). 20

24、NC-Unused. 21FL SDATAOData output to FL dot driver. 22NC-Unused. 23FL SCLKOClock output to FL dot driver. 24FLRESETOReset output to FL dot driver.Reset 25FL CEOCE output to FL dot driver. 26REMIRemote control signal input. 27MODEL TYPEIDiscrimination port for model type.Fixed 28CD BLKCKISub code syn

25、chronous signal input. 29RDSCLK-Unused. 30,31ENC A,BIVolume encoder (A/B) input. 32VDD2-Microcomputer power supply (+5v). 33RESETIReset signal input for microcomputer.Reset 34CEIBack up detection input.AC OnAC Off 35OP/CL SWIInput port of detection switch for CD open/close. 36SLTSWICD start switch i

26、nput. 37XRSTOCD DSP reset output.Reset 3840NC-Unused. 4-4 Port Description of Microprocessor MDX-G3 7 CIRCUIT DESCRIPTION Port No.Port NameI/ODescription Active HL 41VPP-Microcomputer power supply (+5v). 42MDATAOCD DSP command data output. 43STATICD DSP status signal input. 44MCLKOCD DSP command clo

27、ck signal output. 45MLDOCD DSP command load signal output. 46SUBQICD sub code input. 47SQCKOClock output for CD sub code. 48EEP SDA-Unused. 49EEP SCL-Unused. 50HI SPEED-Unused. 51OPEN-Unused. 52CLOSE-Unused. 53MD CEIDetection port for MD back up. 54MD RSTIReset output from MD mechanism. 55INI MD SWI

28、Unused. 56BACK CHK-Unused. 57BACK ON-Unused. 58MD IN SWILoad switch input for MD disc. 59NC-Unused. 60PLAY SWIDetection switch input of head position for deck. 61CrO2 SW-Unused. 62HALF SWICassette half switch input. 63REC F SWIDeck forward recording switch input.OFFON 64CPMOControl port of capstan m

29、otor for deck. 65REC R SWIDeck reverse recording switch input.OFFON 66SOLOControl port of solenoid for deck. 67LMUTEODeck line mute control.ON 68A/B-1ODeck recording mute The value shown in ( ) is the voltage measured at the moment of STOP. The voltage followed by (REC) refers to the value during MD

30、 RECORDING. 2SC2878 2SC3940A 2SA1175 2SC2785 DTA124ESA DTC143TSA KRC103M UN4112UN4212 UN4216 DTA144EUA DTC114YUA UN5111 2SA1576A 2SD1819A KTC32052SB798-DL 2SC4081DTA114EUA DTA124EUA DTC124EUA UVXZABADWYAAAC 2 1 3 5 7 4 6 1 2 3 4 5 6 L-PLAY L-REC R-REC R-PLAY GND ERASE 12 11 10 9 8 7 6 5 4 3 2 1 SOL

31、PHOTO PLAY-SW CPM+ NC NC NC COMMON CrO2-SW PACK-SW REC-F-SW REC-R-SW 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 TA +9V L-PLAY-OUT TA MGND R-PLAY-OUT NC L-REC-IN TA-SIG-GND R-REC-IN BEAT-C R/P(H=REC) BIAS(H=BIAS ON) NOR(H=NOR, SJ3MD ONLY) A/B(L=PLAY) LINE-MUTE SOL PHOTO REC-R SW CPM

32、REC-F SW HALF SW (SJ3MD ONLY) PLAY SW 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 VEF GND BIN-R AIN-R PBNF-R PBEQ-R EQOUT-R TAI-R PBOUT-R MAI MAOUT IREF RIN-R RIP ROUT-R 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 REC-RET BIN-L AIN-L PBNF-L PBEQ-L EQOUT-L TAI-L PBOUT-L BI/II A/B A120/70 MUTE RIN-L VCC ROUT

33、-L 47K R118 R119 47K 750 R124 2.2K R120 750 R121 47K R125 L3 8200P C111 47u25 C110 + R115 2.2 1/4W R114 2.2 1/4W 0.018 C109 4700P C108 10K R112 R111 10K C107 4700P 10 1/4W R113 C106 10u50 + R110 18K R122 3.3K 1.5K R108 10K R107 R4 8200P C4 7.5K R8 10K 5.1K R6 0.039 C6 22K 1u50 + 10u50 + C13 10u50 +

34、C14 15K R15 15K R16 L1 10mH C15 220P L2 10mH C16 220P 680P C1 220K R1 R2 220K C2 680P 10K R17 10K R18 330K VR2 VR1 330K 220P C17 47K R19 220P C18 47K R20 1M R21 1M R23 1M R22 1M R24 R3 10K C3 8200P R7 7.5K R5 5.1K C5 0.039 10uH L4 1u50 C105 + 1 1/4W R123 + 4.7u50 C103 4.7u50 C104 + R105 10K 4.7 1/4W

35、 R100 C100+ 4.7u50 C11 + 5.6K R9 10u50 C7 + C19 4.7u50 + 100u10 9 10 18 4.7u50 + 5 4 6 2 3 1 7 8 2 1 100u10 C114 + W51 4.7u50 + C12 5.6K 10u50 + R10C8 0.22u50 C9 + 4.3K R13 2.7K R11 2.7K R12 R14 4.3K 0.22u50 C10 + 14 18 20 R25 1K R26 1K C21 4700P C20 R101 C101 C22 4700P VH02 ONLY) BI/II(L=TYPE I, (H

36、=MUTE ON) CrO2 SW +B 9 3 1 2 6 4 5 7 8 12 10 11 6 5 4 3 1 2 SOL 2.2K 10K MATSUSHITA MTR 14 20 +9V +9V +9V +9V +9V +9V+9V 8 3 4 5 6 7 9 10 E3 E1 E2 R103 100 R104 10K W50 +B +B +B +B +B CN3 CN2 CN1 Q2 Q1 D4 Q3Q4 Q9 Q10 D2 Q6 Q5 Q8 Q17Q18 Q15Q16 Q19 3/3 X09-A/7 CN5 IC1: HA12230NT Q1,2: 2SB1424(Q,R) Q4:

37、 KRC103M or UN4212 Q5,6,19: DTC124EUA or UN5212 Q8: KTC3205 or 2SC3940A(R,S) Q9,10: KTC3199(Y,GR) or 2SC2785(F,E) Q15-18: RK7002 D1,2: 1SS133 or HSS104A D4: S5688B(TPB5) B LINE GND LINE SIGNAL LINE DIGITAL LINE E HD Rch Lch R/P HD Q3DTC143TSA or: UN4216 D1 BIAS (Lch) BIAS (Rch) IC1 (X28-3130-00) MDX

38、-G3 (2/3) B REC : 4.0V PLAY : 0V 4.5V 4.5V 4.5V 4.5V REC : 8.0V PLAY : 4.0V4.5VREC : 4.5V PLAY : 0VPLAY : 0V STOP/REC : 4.2V 4.5V REC : 4.2V 8.9V PLAY : 4.5V 9.0V 4.3V 4.5V 1.2V 4.5V 4.5V REC : 4.2V PLAY : 4.5V 4.5V 4.5V 4.5V 4.5V REC : 4.5V REC : 8.9V REC : 5.2V REC : 4.0V STOP : 8.7V PLAY : 8.3V S

39、TOP : 8.7V PLAY : 8.2V STOP : 0V PLAY : 4.6V MDX-G3 Y39-3740-21 CAUTION: For continued safety, replace safety critical components only with manufacturers recommend- ed parts (refer to parts list). indi- cates safety critical components. For continued protection against risk of fire, replace only wit

40、h same type and rating fuse(s). To reduce the risk of electric shock, leakage-current or resistance measurements shall be carried out (exposed parts are acceptably insulated from the supply circuit) before the appliance is returned to the customer. DOLBY and the double-D symbol are trademarks of Dol

41、by Laboratories Licensing Corporation. Noise reduction circuit made under license from Dolby Laboratories Licensing Corporation. The DC voltage is an actual reading measured with a high impedance type voltmeter with a cassette loaded at playback mode. The measurement value may vary depending on the

42、measuring instru- ments used or on the product. Bias circuit DC voltage is measured while in the record mode. AEAGAIAKAMAFAHAJALAN 2 1 3 5 7 4 6 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 VC VCC E D A B C F LD GND LD VR PD FCS(+) TRK(+) TRK(-) FCS(-) 2 1 SW GND OP/CL SW 1 2 LD VCC 1 2 VC RF 36 35 34 33

43、32 31 30 29 28 27 26 25 24 23 22 21 20 19 PDAC PDBD PDF PDE PDER PDFR TBAL FBAL FE- FEOUT TE- TEOUT CROSS TEBPF VDET LDOFF VREF ENV 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 PD LD LDON LDP VCC RF- RFOUT RFIN CAGC ARF CENV CEA CSBDO BDO CSBRT OFTR RFDET GND 61 62 63 64 65 66 67 68 69 70 71 72 73 7

44、4 75 76 77 78 79 80 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 BBYTCK CLDCK FCLK IPFLAG FLAG CLVS CRC DEMPH RESY IOSEL TEST AVDD1 OUTL AVSS1 OUTR RSEL CSEL PSEL MSEL SSEL B

45、CLK LRCK SRDATA DVDD1 DVSS1 TX MCLK MDATA MLD SENSE FLOCK TLOCK BLKCK SQCK SUBQ DMUTE STAT RST SMCK PMCK LDON BDO RFDET TRCRS OFT VDET RFENV TE FE TBAL FBAL VREF FOD TRD KICK ECS ECM PC TVD TRV XVDD X2 X1 XVSS SBCK SUBC VCOF2 PCK/DSLB EFM/CK384 AVSS2 AVDD2 VCOF PLLF DSLF DRF IREF ARF WVEL PLAY PLLF2

46、 26 25 24 23 22 21 20 19 18 17 16 IN3 IN4 VREF SVCC STANDBY PGND2 PVCC2 VO4+ VO4- 1 2 3 4 5 6 7 8 9 10 11 IN2 PC2 IN1 PC1 RSTOUT PGND1 PVCC1 VO1- VO1+ R201 47K R202 68K R203 68K R205 68K R204 68K R206 47K 31 32 33 34 35 36 37 38 39 40 30 R259 33K R260 150K R257 10K R258 100K R254 33K 270K R251 18K R

47、256 6.8K R255 3 4 VCC 6 5 7 2 1 GND 8 C287 12P C275 5600P 1200P C277 R275 2.2K R271 2.2K 10P C288 2.2K R276 2.2K R272 1200P C278 100K R273 100K R274 5600P C276 C283 47P C284 100P C280C279 100u10 + R285 10KR286 10K + C285 100u10 2.2K R281 2.2K R282 C281 1500PC282 1500P 3.3u50 + C271 3.3u50 + C272 OUT

48、IN GND 4.7 R291 C297 0.01 10u50 + 22 R287 16 14 15 17 L201 10uH R207 91 C211 0.1 C212 0.1 R215 56K C213 330P R218 68K C214 220P 100 R214 10 R213 R216 39K R217 100 R211 330K 330K R212 37 33 32 30 31 35 34 C217R219 47K0.022 100K R220 0.022 C216 0.033 C218 C206 100u10 + 38 36 39 C230 2200P C229 4700P C228 0.022 C227 2200P 820K 1u50 +