– 1 –CD-K491WNo.S0883CDK491W/ CONTENTSPageSAFETY PRECAUTION FOR SERVICE MANUAL ...

CD-K491W– 10 –CP-K4911 Front Speaker 1. Net ... (A1) x1 10-22. Baffle Board ... (A2) x13. Screw ... (

– 11 –CD-K491WHow to remove the pickup (See Fig. 11-2)1. Remove the screws (B1) x 2 pcs., to remove the shaft (B2).2. Remove the stop washer (B3) x 1

CD-K491W– 12 –MECHANISM SECTION• Driving Force CheckTorque MeterSpecified ValuePlay: TW-2412 Tape 1: Over 80 gTape 2: Over 80 g• Torque CheckTorque Me

– 13 –CD-K491WFigure 13 ADJUSTMENT POINTSInstrumentConnection• FM RFSignal generator: 1 kHz, 40 kHz dev, FM modulatedTest StageFrequencyFrequencyDispl

CD-K491W– 14 –TEST MODE21TOTE200 ms1V/diVIC 1 15200 ms1V/diVIC 1 7TRACKING/ERRORBARANCEADJUSTFigure 14-2Figure 14-32110ms0.50 VIC1 20 FE10ms0.

– 15 –CD-K491WDVD 1/VCR 1DVD 2/VCR 2DVD 1/VCR 1DVD 2/VCR 2When you connect this unit to a DVD player which is playinga disc with the

CD-K491W– 16 –SW1 OPEN/CLOSE ON—OFFSW2 MECHA UP ON—OFFSW3 DISC NUMBER ON—OFFSW4 PICKUP IN ON—OFFSW991 VOLTAGE SELECTOR 230-240VSWD01 VOLUME JOG ON—OFF

– 17 –CD-K491W Figure 17 BLOCK DIAGRAM (1/5)82712345986720121324253031322234353610 1127262829PU-IN SWXL1XINLD0FIN2JP–CV+SLCSL1FIN1EFTOFDSPONCSLDSL–SL+

CD-K491W– 18 – Figure 18 BLOCK DIAGRAM (2/5)138 101 4 6 7 14TOS ICA14GP1F38RDVD2DIGITALINICA15TC74HCU04INVERTERININDVD2DIGITALINFROM CD UNIT4 3 5 8

– 19 –CD-K491W Figure 19 BLOCK DIAGRAM (3/5)97 12135 DEM0DEM1XT1 BICKLRCK6 PD1620222 1415248 1817+B121 3 101121A-GND D3-GNDCENTERSUB WOOFERCENTERSUB

CD-K491W– 2 –SAFETY PRECAUTION FOR SERVICE MANUALWARNINGSTHE AEL (ACCESSIBLE EMISSION LEVEL) OF THE LASER POWER OUTPUT IS LESS THAN CLASS 1 BUT THE LA

CD-K491W– 20 – Figure 20 BLOCK DIAGRAM (4/5)J602MIC2J602MIC1VR602MIC2VOLUMEVR601MIC1VOLUMEVR603DIGITAL ECHOVOLUMEIC601M65845FPMIC AMP.LR10 252619 1827

– 21 –CD-K491W Figure 21 BLOCK DIAGRAM (5/5)03ECHOMELR2618272928DINOUT8417352362615560 78 7987 88 91929394 9596979810100111413185690155789121617288685

CD-K491W– 22 –Figure 22 SCHEMATIC DIAGRAM (1/20)ABCDEFGH123456• NOTES ON SCHEMATIC DIAGRAM can be found on page 16.R46560FSSLDODEFCLKCLDATCEDRFVCC2REF

– 23 –CD-K491WFigure 23 SCHEMATIC DIAGRAM (2/20)78 9 10 11 12• The numbers 1 to 12 are waveform numbers shown in page 52.11R8556(1/2W)C560.022 Q

CD-K491W– 24 –ABCDEFGH123456• NOTES ON SCHEMATIC DIAGRAM can be found on page 16.Figure 24 SCHEMATIC DIAGRAM (3/20)DH061SS133QG04KTA1266 GR9/5010/100S

– 25 –CD-K491WFigure 25 SCHEMATIC DIAGRAM (4/20)78 9 10 11 12CG040.01DG051SS133RG371KRG363.3KQG01KRC102 MQG03KTC3199 GRRG32100 ZDF01MTZJ3R3ARG311KDG02

CD-K491W– 26 –Figure 26 SCHEMATIC DIAGRAM (5/20)ABCDEFGH123456• NOTES ON SCHEMATIC DIAGRAM can be found on page 16.TAPE MECHANISM ASSEMBLYQK14KRC104

– 27 –CD-K491WFigure 27 SCHEMATIC DIAGRAM (6/20)78 9 10 11 12RK574.7KQK19KRC104 MCK4147/25 CK46220/10CK4522/25 RK5010K RK58150(1/2W) ICK01AN7345KPLAY

CD-K491W– 28 –Figure 28 SCHEMATIC DIAGRAM (7/20)ABCDEFGH123456• NOTES ON SCHEMATIC DIAGRAM can be found on page 16.RR1947K CR154.7/50RR2147K CR174.7/5

– 29 –CD-K491WFigure 29 SCHEMATIC DIAGRAM (8/20)78 9 10 11 12CP5722/25 RP7322K QP11KTC3199GRRP295.6KCP250.001 CP260.001 RP305.6KQP12KTC3199GRCP280.022

– 3 –CD-K491WFOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFERTO THE OPERATION MANUAL.CD-K491WSpecifications for this model are s

CD-K491W– 30 –ABCDEFGH123456• NOTES ON SCHEMATIC DIAGRAM can be found on page 16.Figure 30 SCHEMATIC DIAGRAM (9/20)TO MAIN SECTION P25 8-CTO MAIN SE

– 31 –CD-K491W78 9 10 11 12Figure 31 SCHEMATIC DIAGRAM (10/20)QS_SPREDL_CH_IN R_CH_IN C_OUT L_CH_OUTR_CH_OUTRR_OUTRL_OUTGND(AU) +12V(A) RL_INRR_INQS_A

CD-K491W– 32 –ABCDEFGH123456Figure 32 SCHEMATIC DIAGRAM (11/20)• NOTES ON SCHEMATIC DIAGRAM can be found on page 16.J602MIC2BI601CNSU02C6222.2/50C6232

– 33 –CD-K491W78 9 10 11 12Figure 33 SCHEMATIC DIAGRAM (12/20)RT0322RT104.7KRT0810KCT150.022RT0447C309330PC3100.001R311100KL311560µHQ361KRC107 MQ365KR

CD-K491W– 34 –ABCDEFGH123456Figure 34 SCHEMATIC DIAGRAM (13/20)• NOTES ON SCHEMATIC DIAGRAM can be found on page 16.DOLBY AUDCA460 047CA390.1 CA380.1

– 35 –CD-K491W78 9 10 11 12Figure 35 SCHEMATIC DIAGRAM (14/20)ICA19AK4321 CA590.001 CA600.1 CA610.1 CA62100/16CA6410/16 CA6310/16 CA650.015 CA660.015

CD-K491W– 36 –Figure 36 SCHEMATIC DIAGRAM (15/20)• NOTES ON SCHEMATIC DIAGRAM can be found on page 16.ABCDEFGH123456CD050.001CV91100PCV92100PJV91HEADP

– 37 –CD-K491W78 9 10 11 12Figure 37 SCHEMATIC DIAGRAM (16/20)XD010031LD012.2µH CD060.001SWD01VOLUME JOG SW 0.001CD070.001CD080.001SWD02JOGCD02100/10

CD-K491W– 38 –ABCDEFGH123456Figure 38 SCHEMATIC DIAGRAM (17/20)• NOTES ON SCHEMATIC DIAGRAM can be found on page 16.RV2156K RV19390 CV19100/50RV1356KC

– 39 –CD-K491W78 9 10 11 12Figure 39 SCHEMATIC DIAGRAM (18/20)RV4156KCV310.1(ML) CV330.1(ML) RV444.7(1/2W) CV340.1(ML) RV4256KRV51330(1/2W) RV52330(1/

CD-K491W– 4 –NAMES OF PARTSCD-K491W Front panel1. Disc Tray2. Disc Number Selector Buttons3. Disc Skip Button4. Open/Close Button5. Left Front Speake

CD-K491W– 40 –ABCDEFGH123456Figure 40 SCHEMATIC DIAGRAM (19/20)• NOTES ON SCHEMATIC DIAGRAM can be found on page 16.D9041N4004SD991KBU1003 Q908KTC3199

– 41 –CD-K491W78 9 10 11 12Figure 41 SCHEMATIC DIAGRAM (20/20)230-240V220V127V110VF990T5AL 250VSW991VOLTAGESELECTORF997T2.5AL 250V D993D995D994D992F

CD-K491W– 42 –Figure 42 WIRING SIDE OF P.W.BOARD (1/10)ABCDEFGH1234569 8 7 6 5 4 3 2 1CNPU0210/100FM/MW9/50SWF02SPANSELECTORQG04CZ71QR13CR02CP19CP53RP

– 43 –CD-K491WFigure 43 WIRING SIDE OF P.W.BOARD (2/10)78 9 10 11 12 3 2 12RK58RK19RK09RK01RK17RF43RF46RF51RF54RF58RF61RF65RF64RF81RF31RF30RF29RF36RF3

CD-K491W– 44 –Figure 44 WIRING SIDE OF P.W.BOARD (3/10)ABCDEFGH123456LEDD03FFSWD26VIRTUAL FWD02 CV92RE02RE03RD13DD02RE25RD33RD32RD58RE56LV91RV91RV92R

– 45 –CD-K491WFigure 45 WIRING SIDE OF P.W.BOARD (4/10)78 9 10 11 12SWD34CLOCKSWD38CLEAR SWD49KARAOKESWD40DVD/VIDEO2XD01LEDD21SWD52DISC3SWD51D1SC2SWD5

CD-K491W– 46 –Figure 46 WIRING SIDE OF P.W.BOARD (5/10)ABCDEFGH123456120JA11DIGITAL 2COAXIALCNSA11FWA02CFWU02TO MAIN PWBP42 3-HCNPR12TO MAIN PWBP42 2-

– 47 –CD-K491WFigure 47 WIRING SIDE OF P.W.BOARD (6/10)78 9 10 11 12+-+-PICK UP INSLED MOTORSPINDLE MOTORM2CNP3ASW4M1+-123456BI99CNS52121CNS10WHRDGYWH

CD-K491W– 48 –Figure 48 WIRING SIDE OF P.W.BOARD (710)ABCDEFGH1234561 2 33 2 1E C B321321321321ECBECBECBECBECBBCEB C E1 2 3123R321R3022345 17896

– 49 –CD-K491WFigure 49 WIRING SIDE OF P.W.BOARD (8/10)78 9 10 11 12CNPM2SWM5F. A. SSWM4REC RVSSWM3REC FWDVRM1TAPESPEED1FWM243421PHM1SWM6CAMTAPE MECHA

– 5 –CD-K491W62 63VIDEO OUTMONITORSPANSELECTORFM/MW(kHZ)50/9100/101234567810111315 1617 189121444 4546 47 48 49 50 515253 54 555657 58 59 6061 Rear p

CD-K491W– 50 –ABCDEFGH123456Figure 50 WIRING SIDE OF P.W.BOARD (9/10)ECBECBBCESPEAKER AMP.1 PWB-F1SPEAKER AMP.2 PWB-F2CNS904CFWP02TO POWER PWBP51 12-F

– 51 –CD-K491WFigure 51 WIRING SIDE OF P.W.BOARD (10/10)C919C913D992C906ZD952 D995R906R904C905D991C960C961Q951ZD951 C963D952R957R956D951C959ZD902D993C

CD-K491W– 52 –WAVEFORMS OF CD CIRCUIT35ms0.50 VIC1 20 F.E15ms5.0 VIC1 54 DRFSTOP PLAYFOCUS SERCH1354267891011345678967810111296789120.5ms1.00 V

– 53 –CD-K491WTROUBLESHOOTINGWhen the CD does not functionWhen the CD section does not operate When the objective lens of the optical pickup is dirty,

CD-K491W– 54 –• When the CD tray fails to open or close.Is there following voltage input in specific state of ICF01 pin 86? Open state: 0V Cl

– 55 –CD-K491W• Playback can only be performed when a disc isloaded.Is HF waveform normal (see the Fig.55-1, 2)?Check the tracking system. Is the Foc

CD-K491W– 56 –• Checking the spin system.YesNoPlay operation is performed without disc.The turntable rotates a little.The turntable fails to rotate o

– 57 –CD-K491W1 DEFI Input Input terminal of defect detection signal (DEF). (Connected to OV when not used.)2 TAI Input For PLL Input terminal for tes

CD-K491W– 58 –IC2 VHiLC78622K-1: Servo/Signal Control (LC78622K) (2/2)FunctionTerminal NameInput/Output49* PW Output Output terminal of subcodes P, A

– 59 –CD-K491WIC1 VHiLA9241M/-1: Servo Amp. (LA9241M) (1/2)1 FIN2 Connection pin for photodiode of pickup.RF signal is generated through addition with

CD-K491W– 6 –GBOXS0010AWM3GBOXS0011AWM3CP-K491 CP-SW491 Front speakers1. Super Tweeter2. Tweeter3. Woofer4. Bass Reflex Duct5. Speaker Terminals

CD-K491W– 60 –IC1 VHiLA9241M/-1: Servo Amp. (LA9241M) (2/2)Pin No.Port NameFunction51 CL Micro computer command clock input pin.52 DAT Micro computer

– 61 –CD-K491W1 VREFOUT Output Buffered reference voltage output (VANA/2)2 VREFIN Input Reference voltage input (Biased to VANA/2 internally)3 MSC3 I

CD-K491W– 62 –ICF01 RH-iX0254AWZZ:System Microcomputer (IX0254AW)1,2 P00-P01 Input/Output 8-Bit input/output port. Input/output can be specified in 4

– 63 –CD-K491WICD01 RH-iX0234AWZZ:System Microcomputer (IX0234AW) (1/2)1,2 P16-P17 Input/Output 8-Bit input/output port. Input/output can be specifie

CD-K491W– 64 –ICD01 RH-iX0234AWZZ:System Microcomputer (IX0234AW) (2/2)In this unit, the terminal with asterisk mark (*) is (open) terminal which is

– 65 –CD-K491W1* A0 Output Address bus. The address bus is always active.2 GND — Ground pin3 SS_ Input Serial host interfase: Slave select input (SPI)

CD-K491W– 66 –54 SDD Output Data output for serial ports B, C and D55 VCC — Used to connect a power supply of +3.3V ±5%56* GPIO2 Input/Output General-

– 67 –CD-K491WICA18 VHiZR38600/-1: DOLBY AC-3/5.1CH MPEG2 AUDIO DECORDER (ZR38600 )Serial In123S/PDIFInputControlDataBus1620AddressBusSeiralAudioInpu

CD-K491W– 68 –FLD01 : VVKBJ613GK/-1 FL DisplayFigure 68 FL DISPLAYPIN No.CONNECTIONPIN No.CONNECTION1234567891011121314151G 2G 3G 4G 5G 6G 7G 8G 9G

– 69 –CD-K491WPARTS GUIDENOTE:Parts marked with “ ” are important for maintaining the safety of the set.Be sure to replace parts with specified ones f

– 7 –CD-K491WOPERATION MANUALSETTING THE CLOCK1Press the ON/STAND-BY button to enter the stand-by mode.2Press the CLOCK button.3Within 5 seconds, pres

PRICERANKDESCRIPTIONNO.PARTS CODE NO. PARTS CODEPRICERANKDESCRIPTIONCD-K491W– 1 –INTEGRATED CIRCUITSIC1 VHILA9241M/-1 J AS Servo Amp.,LA9241MIC2 VHILC

NO.PRICERANKDESCRIPTIONPARTS CODENO. PARTS CODEPRICERANKDESCRIPTIONCD-K491WDV17 VHD1SS133//-1 J AA Silicon,1SS133DV19~25 VHD1SS133//-1 J AA Silicon,1S

PRICERANKDESCRIPTIONNO.PARTS CODE NO. PARTS CODEPRICERANKDESCRIPTIONCD-K491WC85 VCKYBT1HB102K J AA 0.001 µF,50VC301 VCKYMN1HB102K J AA 0.001 µF,50VC30

NO.PRICERANKDESCRIPTIONPARTS CODENO. PARTS CODEPRICERANKDESCRIPTIONCD-K491WCA95,96 VCEAZA1EW476M J AB 47 µF,25V,ElectrolyticCA97 VCKYTV1EF104Z J AA 0.

PRICERANKDESCRIPTIONNO.PARTS CODE NO. PARTS CODEPRICERANKDESCRIPTIONCD-K491WCV27 VCEAZA0JW108M J AC 1000 µF,6.3V,ElectrolyticCV28 VCEAZA1HW476M J AB 4

NO.PRICERANKDESCRIPTIONPARTS CODENO. PARTS CODEPRICERANKDESCRIPTIONCD-K491WR330 VRD-ST2CD102J J AA 1 kohm,1/6WR338,339 VRD-ST2CD471J J AA 470 ohms,1/6

PRICERANKDESCRIPTIONNO.PARTS CODE NO. PARTS CODEPRICERANKDESCRIPTIONCD-K491WRE22 VRD-ST2CD102J J AA 1 kohm,1/6WRE23 VRD-ST2CD122J J AA 1.2 kohms,1/6WR

NO.PRICERANKDESCRIPTIONPARTS CODENO. PARTS CODEPRICERANKDESCRIPTIONCD-K491WRK66 VRD-MN2BD273J J AA 27 kohms,1/8WRK67 VRD-MN2BD473J J AA 47 kohms,1/8WR

PRICERANKDESCRIPTIONNO.PARTS CODE NO. PARTS CODEPRICERANKDESCRIPTIONCD-K491WRZ43~46 VRD-ST2CD102J J AA 1 kohm,1/6WRZ47 VRD-MN2BD102J J AA 1 kohm,1/8WR

NO.PRICERANKDESCRIPTIONPARTS CODENO. PARTS CODEPRICERANKDESCRIPTIONCD-K491WSWM3(250-9) 92LM-SW1676A J AC Switch,Leaf Type [REC FWD]SWM4(250-10) 92LM-S

CD-K491W– 8 –1 Top Cabinet 1. Screw ... (A1) x4 8-12 Side Panel 1. Screw ... (B1) x8 8-1(Left/right)3 CD Player

PRICERANKDESCRIPTIONNO.PARTS CODE NO. PARTS CODEPRICERANKDESCRIPTIONCD-K491W290 JKNBZ0537AWSA J AC Button,Karaoke Marker291 TSPC-0532AWZZ J Label,Spec

NO.PRICERANKDESCRIPTIONPARTS CODENO. PARTS CODEPRICERANKDESCRIPTIONCD-K491W– 12 –907 92L394-0041 J AC Leg Cushion908 92L372-0094 J AB Screw,ø4×20mm909

CD-K491W– 13 –ABCDEFGH123456Figure 13 CD MECHANISM EXPLODED VIEWCD-K491W306-1701304701302301702702303M1703x2305x2SW4M2305PWB-K306-2306-3306704

CD-K491WFigure 14 CABINET EXPLODED VIEW (1/2)ABCDEFGH123456CD-K491WNote: Only the unit and consumale parts are supplied as aprts supply for the Tape

CD-K491WABCDEFGH123456Figure 15 CABINET EXPLODED VIEW (2/2)CD-K491W– 15 –PWB-JCDMECHANISMPWB-B604281262272267258283281604262620x4281271259SOLM2M3602x

CD-K491WABCDEFGH123456Figure 16 SPEAKER EXPLODED VIEW (1/3)CP-K491– 16 –903905x2905x2SP3,4909x2911SP1,2908x4910(withCapacitor C1,2)C1,2Capacitor912909

CD-K491WABCDEFGH123456CP-SW491Figure 17 SPEAKER EXPLODED VIEW (2/3)– 17 –RED BLACK901900SP7SP7905x4902906907903

CD-K491WFigure 18 SPEAKER EXPLODED VIEW (3/3)ABCDEFGH123456GBOXS0011AWM3GBOXS0010AWM3Center SpeakerRear Speaker– 18 –C12.7µF, 100V FilmCapacitorC12.7µ

– 9 –CD-K491WFigure 9-1Figure 9-2Figure 9-3Figure 9-4Figure 9-5Figure 9-6(E2) x4ø3 x10mm(D3) x4ø3x10mm(F1) x1ø3 x10mm(D3) x8ø3x10mm(E2) x1ø3x10mm(G4)