Kenwood-RXDA75-cs-sm 电路图 维修手册.pdf

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1、(XD-A55/A75) 70% MINI HiFi COMPONENT SYSTEM RXD-A55/A75 SERVICE MANUAL 2001-4/B51-5713-00 (K/K) 1382 Panel assy (A60-2091-08) Knob(VOLUME) (K27-2470-08) Dress ring (A21-3957-08) In compliance with Federal Regulations, following are repro- duction of labels on, or inside the porduct relating to laser

2、 prod- uct 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 interlock defeated. AVOID DIRECT EXPOSURE TO BEAM. * Refer to parts list on page 33. Panel(CD) (A60-2090-08) Front glass * (B10-)

3、 RadioFans.CN 收音机爱 好者资料库 RXD-A55/A75 2 CONTENTS / ACCESSORIES CONTENTS / ACCESSORIES . 2 EXTERNAL VIEW.3 DISASSEMBLY FOR REPAIR.4 BLOCK DIAGRAM .9 CIRCUIT DESCRIPTION.11 ADJUSTMENT.14 PC BOARD . 16 SCHEMATIC DIAGRAM . 23 EXPLODED VIEW .31 PARTS LIST.33 SPECIFICATIONS .37 Contents FM Antenna (1) (T90

4、-0883-08) AM Loop Antenna (1) (T90-0879-08) Remote Control (1) (A70-1531-08) AA size battery (UM/SUM-3, R6, HP-7 or similar)(2) Accessories SYSTEM CONFIGURATIONCautions SYSTEMMAIN UNITDESTINATIONSPEAKER XD-A55RXD-A55KPLS-N50S XD-A75RXD-A75KPLS-N70S CLASS 1 LASER PRODUCT The marking this product has

5、been classified as Class 1. It means that there is no danger of hazardous radiati outside the product. RadioFans.CN 收音机爱 好者资料库 RXD-A55/A75 3 EXTERNAL VIEW ANTENNA FM 75 AM LOOP R SPEAKERS +- RL - VIDEO /AUX L Pin jack (E63-1219-08) Pin assy (E40-8933-08) Cabinet(TOP) (A02-3014-08) Lock terminal boar

6、d (E70-0144-08) AC power cord bushing (J42-0351-08) AC power cord (E30-7222-08) FM Antenna (E70-0145-08) RadioFans.CN 收音机爱 好者资料库 Caution on Disassembly Follow the below-mentioned notes when disassembling the unit and reassembling it, to keep it safe and ensure excellent performance: 1. Take cassette

7、 tape and compact disc out of the unit. 2. Be sure to remove the power supply plug from the wall outlet before starting to disassemble the unit. 3. Take off nylon bands or wire holders where they need be removed when disassembling the unit. After servicing the unit, be sure to rearrange the leads wh

8、ere they were before disassembling. 4. Take suffcient care on static electricity of integrated circuits and other circuits when servicing. Figure 7-2 Figure 7-3 1Top Cabinet1. Screw . (A1) x47-1 2Side Panel1. Screw . (B1) x87-1 (Left/right) 3CD Player Unit/1. Turn on the power supply,7-2 CD Tray Cov

9、er open the disc tray, take out the CD cover, and close. (Note 1) 2. Screw . (C1) x1 3. Hook. (C2) x3 4. Hook. (C3) x2 5. Socket . (C4) x2 4Rear Panel1. Screw . (D1) x97-2 5Main PWB1. Screw . (E1) x17-2 2. Socket . (E2) x38-2 3. Flat Cable . (E3) x1 4. Tip Wire. (E4) x1 6Power Supply PWB1. Screw . (

10、F1) x28-2 2. Socket . (F2) x1 3. Flat Wire. (F3) x18-3 7Front Panel1. Screw . (G1) x38-2 8Display PWB1. Screw .(H1) x98-3 2. Socket . (H2) x1 9Tape Mechanism1. Open the cassette holder.8-3 2. Screw. (J1) x5 10Headphones PWB1. Screw . (K1) x18-3 11Turntable1. Hook. (L1) x28-4 2. Cover . (L2) x1 12Dis

11、c Tray1. Turn fully the lock lever in the7-3 arrow direction. 2.While holding the lock lever,rotate8-1 the cam gear until the cam gear rib engages with the clamp lever. 3. Push the slide holder backward to8-5 engage the claw with the groove and remove it in the direction of the arrow. .(M1) x6 13CD

12、Servo PWB1. Screw . (N1) x18-6 (Note 2)2. Hook. (N2) x2 3. Socket . (N3) x4 14CD Mechanism1. Hook. (P1) x29-1 2. Hook. (P2) x3 15Loading Motor PWB1. Hook. (Q1) x59-1 STEPREMOVALPROCEDUREFIGURE Figure 7-1 (B1)x4 3x10mm (B1)x2 3x10mm Rear Panel (B1)x2 3x10mm Side Panel (Right) Side Panel (Left) (A1)x2

13、 3x12mm (A1)x2 3x12mm Top Cabinet (E1)x1 3x10mm (C3)x1 (D1)x2 3x10mm (C1)x1 3x10mm (D1)x7 3x10mm CD Player Unit DC Tray Cover Rear Panel Pull (C3) x1 (C4)x2 (C2) x3 1 1 2 Main PWB CD Servo PWB Note 1: How to open the changer manually. (Fig. 7-3) 1. In this state, turn fully the lock lever in the arr

14、ow direction through the hole on the loading chassis bottom. 2. While holding the lock lever, rotate the cam gear anticlockwise until the cam gear rib engages with the clamp lever. (Fig. 8-1) 3. After that, push forward the CD slide holder. Note 2: 1. After removing the connector for the optical pic

15、kup from the connector, wrap the conductive aluminium foil around the front end of the connector so as to protect the optical pickup from electrostatic damage. Note 3: 1. Be careful not to break the claw of the CD mechanism. 2. When fining back the cam gear assembly, let it lock by front movement. L

16、OCK LEVER RXD-A55/A75 4 DISASSEMBLY FOR REPAIR RXD-A55/A75 5 DISASSEMBLY FOR REPAIR Figure 8-1 Figure 8-2 Figure 8-3 Figure 8-4 Figure 8-5 Figure 8-6 CLAMP LEVER CAM GEAR RIB (F1)x1 3x6mm (G1)x3 3x10mm (F1)x1 3x10mm (F2)x1 (E3)x1 (E4)x1 (E2)x2 Main PWB (E2)x1 Power Supply PWB Power Supply PWB (H1)x9

17、 3x10mm (H2)x1 (J1)x5 3x10mm (K1)x1 3x10mm (F3)x1 Display PWB Headphones PWB Open Cassette Holder Tape Mechanism Turntable Disc Tray (L2) x1 CD Player Unit (L1) x2 1 3 2 (M1) x3 (M1) x3 (N3) x2 (N2) x2 (N3) x2 CD Servo PWB CD Player Base (N1)x1 3x8mm RXD-A55/A75 6 DISASSEMBLY FOR REPAIR Figure 9-1 (

18、P2) x3 (P1) x1 (Q1) x5 (P1) x1 Loading Motor PWB CD Mechanism RXD-A55/A75 7 DISASSEMBLY FOR REPAIR REMOVING AND REINSTALLING THE MAIN PARTS TAPE MECHANISM SECTION Perform steps 1 to 7 and 9 of the disassembly method to remove the tape mechanism. How to remove the record/playback and erase heads (TAP

19、E 2) (See Fig. 10-1) 1. When you remove the screw (A1) x 2 pcs., the recording/ playback head and three-dimensional head of the erasing head can be removesd. How to remove the playback head (TAPE 1) (See Fig. 10-2) 1. When you remove the screw (B1) x 2 pcs., the playback head. How to remove the pinc

20、h roller (TAPE 1/2) (See Fig. 10-3) 1. Carefully push the inside claw to remove it. The pinch roller pawl in the direction of the arrow , and remove the pinch roller (C1) upwards. Note: When installing the pinch roller, pay attention to the spring mounting position. How to remove the belt (TAPE 1) (

21、See Fig. 10-4) 1. Remove the main belt (D1) x 1 pc., from the motor side. 2. Remove the FF/REW belt (D2) x 1 pc. How to remove the belt (TAPE 2) (See Fig. 10-4) 1. Remove the main belt (E1) x 1 pc., from the motor side. 2. Remove the FF/REW belt (E2) x 1 pc. How to remove the motor (See Fig. 10-5) 1

22、. Remove the screws (F1) x 2 pcs., to remove the motor. Figure 10-1 Figure 10-2 Figure 10-3 Figure 10-4Figure 10-5 TAPE2TAPE1 Main Belt (D1)x1 TAPE2 Main Belt (E1)x1 TAPE1 Main Belt FF/REW Belt (E2)x1 FF/REW Belt (D2)x1 Motor Motor (A1)x2 2x9mm TAPE2 Record/Playback Head Erase Head (B1)x2 2x9mm TAPE

23、1 Playback Head Pinch Roller (C1)x1 STEP1STEP2 (F1) x2 2.6x5mm Motor RXD-A55/A75 8 DISASSEMBLY FOR REPAIR How to remove the pickup (See Fig. 11-2) 1. Remove the stop washer (B1) x 1 pc., to remove the gear (B2). 2. Remove the screws (B3) x 2 pcs., to remove the shaft (B4). 3. Remove the pickup. Figu

24、re 11-2 CD MECHANISM SECTION Perform steps 1, 2, 3, 11 and 14 of the disassembly method to remove the CD mechanism. How to remove the loading motor (See Fig. 11-1) 1. Bend the hooks (A1) x 5 pcs., to remove the loading motor. Figure 11-1 Note After removing the connector for the optical pickup from

25、the connector wrap the conductive aluminium foil around the front end of connector so as to protect the optical pickup from electrostatic damage. (A1)x2 (A1)x1 Loading Moter CD Base (A1)x2 (B3) x2 2.6 x6mm Shaft (B4) x1 Stop Washer (B1) x1 Gear (B2) x1 CD Mechanism Pickup RXD-A55/A75 9 BLOCK DIAGRAM

26、 3 4 5 13 2 T.F 1 2 3 8 1 6 9 7 23 24 7 18 21 15 14 12 16 8 4 1 2 9 5 17 13 AM MIX AM IF GND VCC FM DET VCO MO/ST L R AM OSC IN AM OSC OUT FM/AM OUT AM RF IN STEREO MPXIN FM/AM 10 7 9 21 20 1 MO/ST FM/AM 11 15 22 16 17 VDO 3 4 5 6 OSC 4.5MHz X352 +B4 CE DI CL DO 1 3 2 9 10 7 16 15 13 12 14 11 R L R

27、L R L R L 17 3 +B4 FM OSC AM IN FM IN VT FM OSC FM FM+B 21 4 R L 8 18 AUX TAPE CD TUNER L R 23 +B4 R L 24 2 3 4 6 9 16 T1/T2 REC 13 4 5 7 18 VCC 1 +5V +B3 +B3 23 14 12 21 20 P.B H/N 17 8 15 19 NOR/ HIGH T1/T2 +B4 L R L R 10 L NF R NF ALC REF R REC R NF L REC POP REDUCE R(T2) L NF R(T1) L(T2) L(T1) +

28、B4 +B4 REC 7 4 1 8 -B2 +B4 5 VH+VH- VL- VL+ 14 18 R L 6 7 8,9 10,11 1 -B1 +B1 L-OUT R-OUT SP.DET. 12-14 25-36 15-24 4-11 1,2 38,39,50 10 4-6 7-9 1 2 21 56 58 59 57 55 54 49 50 48 47 46 43 42 67-78 79 80-89 90-92 93-100 52 53 51 45 44 41 40 38 39 36 37 25 33-31 34 35 11 16 13 12 17-20 +B7 +B7 +B7 +B7

29、 +B7 VDD VLOAD RESET VDO 22 23 24 CE CL DO DI VDD AVDO +B6 BIAS T1/T2 REC 1 2 3 +B7 +B3 +B6 R-CH L-CH +B2 -B2 +B3 M10V +B4 A10V VF2 +B4 63Hz 30 7 -B2 4 1 8 10Hz1K 29 28 -VF VF1 +B6 +5V +B5 CD+B C801 +B7 T1/T2 P.B POWER AMP. IC901 Q302 CNP301 AM FM BF301 B.P.F FM FRONT END TA7358AP IC301 FM RF L312T3

30、01 FM OSC T302 FM IFCF303 COVERAGETRACKING AMAM BAND T303T306 OSC BUFF CF352 T351 CF351 IC302 FM IF DET./FM MPX./AM IF LA1832S X351 456kHz ZD351 PLL(TUNER) LC72131 IC303 Q360 CNS11 FROM CD SECTION CNP1 LC75341 IC601 AUDIO PROCESSOR JK601 VIDEO IN M IC101 Q703 Q704 Q705 54PIN IC700 IC700 56PIN 53PIN

31、IC700 55PIN IC700 MOTOR DRIVER TAPE MECHANISM ASSEMBLY SOLM1,SOLM2 SOLENOID MM1 MOTOR TAPE SWM2 T2 PLAY R.PLAY SWM4 SWM1 T1 PLAY SWM3 F.PLAY AN7345K /PLAYBACK AMP. PLAYBACK AND RECORD Rch Lch Rch Lch TAPE 1 TAPE2 PB HEAD REC/PB HEAD SWITCHING Q103-106 SWITCHING Q107,108 AC BIAS Q111 Q109 Q126 Q110 S

32、WITCHING Q121,122 MUTING SWITCHING ERASE HEAD L104Q128 BIAS OSC SWITCHING Q124 BIAS AM IF Q862,863 IC860 KIA4558P OPE AMP. -2ODB ATT SYSTEM MUTE Q603,604Q605,606 Q864,865 Q901-904 FL701 DISPLAY IC700(1/2) SYSTEM UPD 780206 Q710-712 Q701-703 MICROCOMPUTER Q700 RESET XL701 4.1943MHz P-IN JOG701 JOG RX

33、701 SENSOR REMOCON KEY TO CD SECTION JK670 HEADPHONES M M901 FAN MOTOR Q907 DRIVER Q905 RL901 SO901 TERMINAL SPEAKER D809 T801 TRANSFORMER F804 5A/125V F805 5A/125V D810 D811-814 Q803 Q850 F806 CONSTANT VOLTAGE 2A/125V KIA7810AP REGULATOR VOLTAGE Q851 VOLTAGE CONSTANT ZD851 2A/125V F807 KIA4558P MIC

34、ROCOMPUTER IC700(2/2) OPE AMP. IC561,562 SYSTEM UPD 780206 ZD801 REGULATOR KIA7805P VOLTAGE Q852 Q802 Q801 D804 D803 5A/125V F801 D801 CONSTANT REGULATOR VOLTAGE D802-805 T802 SUB POWER TRANSFORMER RY801 AC POWER SUPPLY CORD AC 120V 60Hz UNSWITCH 5V SWITCHING MAIN POWER RXD-A75/A55 RXD-A55/A75 10 BL

35、OCK DIAGRAM FOCUS COIL TRACKING COIL FD0 TD0 SLDO SPDO 20 22 21 26 XOUT WRQ DO RES DI CE CONT5 19 37 28 50 56 75 RFVDD VVDD VDD ADAVDD FIN1 RVDD LVDD XVDD FIN2 LDS LDD TIN2 TIN1 CLK XIN 23 40 51 55 57 69 49 48 66 65 64 63 61 62 5 7 28 18 7 46 41 47 80 10 79 9 8 42 43 45 44 25 70 71 LCHO LVSS RCHO RV

36、SS CONT2 CONT3 CONT4 +3.3V +3.3V 4 5 7 6 18 23 24 40 82 VCC1 VCC2 VCC4 VCC3 1 2 25 17 39 38 42 41 8-14 22 29-35 15 16 27 26 21+5V 1 2 3 4 5 6 AGND R-CH DGND L-CH +5V +5V DO 4 6 5DI CLK 3 2 1 CE WRQ DRF 8 9 7 OC. DISC NO CLAMP SW CD RES 4 5 6 1 2 3 1 6 2 3 4 5 1 4 6 5 3 2 +5V PICK UP UNIT IC1 LC78645

37、E CONTROL SERVO/SIGNAL XL1 33.8688MHz Q2 CONSTANT VOLTAGE Q1 LASER DRIVER IC2 M63001FP DRIVER FOCUS/TRACKING/SPIN/SLED M M M1 MOTOR SPINDLE MOTOR SLED M2 PICKUP IN Q3 CNP7 to SECTION MAIN SECTION CNP8 DISPLAY to CNP4CNS4 M SW1 OPEN/CLOSE SW2 CLAMP DISC SW3 NUMBER LOADING RXD-A75/A55 RXD-A55/A75 11 C

38、IRCUIT DESCRIPTION Port No.Port NameI/OFunction 1VDD-POWER SUPPLY(+5V) 2-20dB ATTO-20dB ATTENUATION 3NO USE/DSA STB-GND 4T BIASODECK BIAS CONTROL 5T T1/T2ODECK T1/T2 CHANGE OVER 6REC/PLAYODECK RECORDING/PLAYBACK CHANGE OVER 7RES OUTOCD DSP REQUEST 8DRFICDRF LEVEL DETECTION 9WRQICD DSP WRITE REQUEST

39、10REQUESTIRESET SIGNAL INPUT 11X2OMAIN CLOCK OUTPUT 12X1IMAIN CLOCK INPUT 13VPP/IC-GND 14XT2-OPEN 15SPN-OPEN 16VDD-POWER SUPPLY(+5V) 17CD CLKOCD DSP CLOCK 18CD DIOCD DSP COMMAND 19CD DOICD DSP CODE Q INPUT 20CD CEOCD DSP CE OUTPUT 21CEOCHIP ENABLE OUTPUT 22CLKOCLOCK OUTPUT 23DIODATA OUTPUT 24DOIDATA

40、 INPUT 25AVSS-GND 26O/C SW/DSA DATAICD OPEN CLOSE SWITCH INPUT 27 NO USE/DSA ACK /TUN SM -GND 28SPEANA 2ISPEANA DATA INPUT(16kHz) 29SPEANA 1ISPEANA DATA INPUT(1kHz) 30SPEANA 0ISPEANA DATA INPUT(63kHz) 3133KEY2KEY0IKEY INPUT 34AVDD-ANALOG POWER SUPPLY 35AVREF-ANALOG REFERENCE VOLTAGE 36P INIPOWER FAI

41、LURE DETECTION 37,38JOG1,0IJOG VOLUME INPUT 1, 0 39REMOCONIREMOTE CONTROL SIGNAL INPUT 40VSS-GND 41SMUTEOSYSTEM MUTE CONTROL 42T SOL BODECK2 SOLENOID CONTROL 43T SOL AODECK1 SOLENOID CONTROL 44T MOTORODECK MOTOR CONTROL 45TIMER LEDOTIMER LED CONTROL 46VDD-POWER SUPPLY(+5V) 47AC RLY CONT.OAC RELAY CO

42、NTROL 48SP RLYOSPEAKER OUTPUT RELAY CONTROL 49SP DETISPEAKER OUTPUT DETECTION 50T1 RUNIDECK1 REEL SENSOR DETECTION PORT 51T2 RUNIDECK2 REEL SENSOR DETECTION PORT 52CD CLAMP SWICD CHANGER CLAMP SWITCH INPUT 53PLAY SW AIDECK PLAY SWITCH A INPUT 54PLAY SW BIDECK PLAY SWITCH B INPUT 55FPAIDECK FORWARD R

43、ECORDING SWITCH INPUT 1. Port Description of Microprocessor RXD-A55/A75 12 CIRCUIT DESCRIPTION Port No.Port NameI/OFunction 56FPBIDECK REVERSE RECORDING SWITCH INPUT 57MIC IN-OPEN 58MP3 LEDOMP3 LED CONTROL 59DESTOUTODISCRIMINATION PORT FOR DESTINATION 60STANDBY LEDOSTANDBY LED CONTROL 61KARAOKE LATC

44、H-OPEN 6266NO USE-GND 6770 P22P19OFL DISPLAY CONTROL PORT DEST3DEST0IDESTINATION INPUT PORT 7178P18P11OFL DISPLAY CONTROL PORT 79VLOAD-FL DRIVER POWER SUPPLY(-30V) 8089P10P1OFL DISPLAY SEGMENT CONTROL PORT 90100G11G1OFL DISPLAY GRID CONTROL PORT Port No.Port NameI/OFunction 1IN2-ICH2 inverted input.

45、 2IN1A-ICH1 inverted input. 3IN1B-OCH1 output offset control. 4OUT1-OCH1inverted output. 5OUT1+OCH1 non-inverted output. 6OUT2-OCH2 inverted output. 7OUT2+OCH2 non-inverted output. 814GND-GND 15OUT3+OCH3 non-inverted output. 16OUT3-OCH3 inverted output. 17IN3-ICH3 inverted input. 18VCC1-Power supply

46、 1 (CH1, CH2, CH3). 19STANDBYISTANDBY signal input. 20VREF-CH1CH4 reference voltage input. 21MUTEIMute signal input (CH6). 22IN5-GND 23IN5+-Connected to power supply. 24VCC2-Power supply 2 (CH4). 25IN4-ICH4 inverted input. 26OUT4-OCH4 inverted output. 27OUT4+OCH4 non-inverted output. 28VCC3-Power supply 3 (CH5). 2935GND-GND 36OUT5+OCH5 non-inverted output. 37OUT5-OCH5 inverted output.