Jvc-KDS-577-Service-Manual(1) 电路图 维修手册.pdf

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1、SERVICE MANUAL CD RECEIVER No.49629 Apr. 2001 COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD. KD-S577 KD-S577 Area Suffix UR - Brazil Contents Safety precaution Preventing static electricity Location of main parts Disassembly method Adjustment method Flow of functional operation until TOC read Maintena

2、nce of laser pickup Replacement of laser pickup Description of major ICs 1-2 1-3 1-4 1-5 1-10 1-11 1-13 1-13 1-14 COMPACT DIGITAL AUDIO RadioFans.CN 收音机爱 好者资料库 KD-S577 1-2 ! Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case

3、of preforming repair of this system. Safety precaution ! Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check. RadioFans.CN 收音机爱 好者资料库 KD-S577 1-3 Front bracket CD mechanism control board Damper bracket CD mechanism assy FD screw Feed motor a

4、ssy FD gearPickup unit Preventing static electricity 1.Grounding to prevent damage by static electricity Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to

5、 prevent this when performing repairs. 2.About the earth processing for the destruction prevention by static electricity Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as CD players. Be careful to use proper grounding in the area where repairs are be

6、ing performed. 2-1 Ground the workbench Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the traverse unit (optical pickup) on it. 2-2 Ground yourself Use an anti-static wrist strap to release any static electricity built up in y

7、our body. 3. Handling the optical pickup 1. In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical pickup are shorted. After replacement, return the shorted parts to their original condition. (Refer to the text.) 2. Do not use

8、a tester to check the condition of the laser diode in the optical pickup. The testers internal power source can easily destroy the laser diode. 4.Handling the traverse unit (optical pickup) 1. Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit. 2.

9、Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to the replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long a time when attaching it to the co

10、nnector. 3. Handle the flexible cable carefully as it may break when subjected to strong force. 4. It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it Conductive material (conductive sheet) or iron plate (caption) Anti-static wrist strap Soldering Attent

11、ion when traverse unit is decomposed 1.Solder is put up before the card wire is removed from connector on the CD substrate as shown in Figure. (When the wire is removed without putting up solder, the CD pick-up assembly might destroy.) 2.Please remove solder after connecting the card wire with when

12、you install picking up in the substrate. *Please refer to Disassembly method in the text for pick-up and how to detach the substrate. RadioFans.CN 收音机爱 好者资料库 KD-S577 1-4 Main unit Location of main parts Control unit CD mechanism DisplayLED Digital: 0) RF signal Flow of functional operation until TOC

13、 read When the pickup correctly moves to the inner area of the disc TERMINAL Microprocessor commands FMO TC9462 53 FEED MOTOR +TERMINAL IC581 5 REST SW When the disc correctly rotates Tracking Servo Loop ON Servo CLV Rough Servo AccelerationAccelerationAcceleration Microprocessor commands Spindle mo

14、tor (-) IC581 7 0.5 Sec 0.5 Sec KD-S577 1-12 Feed Section Focus Section Tracking Section Spindle Section Is the voltage output at IC521 pin 53 5V or 0V? Check the feed motor. Is 4V present at both sides of the feed motor? Is the wiring for IC521 (90) (100) correct? Check IC581. Is 6V or 2V present a

15、t IC581 5 and 6? Is 5V present at IC581 pin 11? Check the feed motor connection wiring. Check the vicinity of IC521. Check CD 9V and 5V. YES YES YES NONO NO NO NO YES YES When the lens is moving: Check the circuits in the vicinity of IC581 pins 15 18. Check the pickup and its connections. NO YES YES

16、 YES Does the S-search waveform appear at IC581 pins 17 and 18? Is the disk rotated? Does the RF signal appear at TP1? Is 4V present at IC581 pins 7 and 8 ? Check the spindle motor and its wiring. Is 4V present at IC521 pin 55 ? Check the vicinity of IC581. Check IC501 and IC521. YES NO NO NO NONO Y

17、ES YES YES Check the circuits in the vicinity of IC501 19 24 or the pickup Is the RF waveform at TP1 distorted? Proceed to the Tracking section When the disc is rotated at first: Check the circuit in the vicinity of IC501 pins 2 12. Check IC521. Check the pickup and its connections. YESYES YES Is th

18、e tracking error signal output at IC501 12? Approx. 1.2 V 4V KD-S577 1-13 Maintenance of laser pickup (1) Cleaning the pick up lens Before you replace the pick up, please try to clean the lens with a alcohol soaked cotton swab. (2) Life of the laser diode When the life of the laser diode has expired

19、, the following symptoms will appear. (1) The level of RF output (EFM output:ampli tude of eye pattern) will be low. Replacement of laser pickup Is RF output 1.0 0.35Vp-p? Replace it. NO YES O.K (3) Semi-fixed resistor on the APC PC board The semi-fixed resistor on the APC printed circuit board whic

20、h is attached to the pickup is used to adjust the laser power.Since this adjustment should be performed to match the characteristics of the whole optical block, do not touch the semi-fixed resistor. If the laser power is lower than the specified value,the laser diode is almost worn out, and the lase

21、r pickup should be replaced. If the semi-fixed resistor is adjusted while the pickup is functioning normally,the laser pickup may be damaged due to excessive current. Turn off the power switch and,disconnect the power cord from the ac outlet. Replace the pickup with a normal one.(Refer to Pickup Rem

22、oval on the previous page) Plug the power cord in,and turn the power on. At this time,check that the laser emits for about 3seconds and the objective lens moves up and down. Note: Do not observe the laser beam directly. Play a disc. Check the eye-pattern at TP1. Finish. KD-S577 1-14 HA13158A (IC321)

23、 : Power amp 1. Pin layout 2. Block diagram IN1 IN2 IN3 IN4 STBY 2 1 11 13 23 10 TAB PROTECTOR (ASO SURGE, TSD) INPUTBUFFER1 INPUTBUFFER2 INPUTBUFFER3 INPUTBUFFER4 AMP1 AMP2 AMP3 AMP4 MUTE PVCC1PVCC2 INVCC + - + - + - + - 12 22 14 18 6 3 4 5 7 8 9 15 16 17 19 20 21 1 23 Description of major ICs KD-S

24、577 1-15 1. Terminal Layout 20 1 41 60 21 40 80 61 2. Block Diagram O F T / R F D E B D O V D E T T R C R S R F E N V T E F E INPUTSERVO TIMING GENERATOR A/D CONVERTER / T E S T / R S T D V S S 1 D V D D 1 V S S V D D CLV SERVO MICRO COMPUTER INTERFACE VCO ITUNING GENERATION PITCH CONTROL STAT CK384

25、(EFM) VCOF BYTCK SMCK FCLK CSEL MSEL X2 X1 PCK EFM PLLF DSLF IREF DRF ARF RSEL PSEL MLD MCLK MDATA DSL. PLL VCO AVDD2 SUB CODE BUFFER SSEL SQCK SUBQ AVDD2 CLVS CRC BLKCK CLDCK SBCK SUBC DEMPH RESY FLAG6(RESY) EFM DEMODULATION SUBCODE DEMODULATION SYNC INTERPOLATION 16k SRAM CIRC ERROR CORRECTION DEI

26、NTERLEVE LRCKIN(MSEL) BCLK(SSEL) SRDATAIN (PSEL) IOSEL DIGITAL DEEMPHSIS 8TIMES OVER SAMPUNC DIGITAL FILTER1BIT DAC LOGIC S PEM (R) PEM (L) DIGITAL AUDIO INTERFACE DIGITAL AUDIO INTERFACE INTER POLATION SOFT MUTING DIGITAL ATTENUATION PEAK DETECTIVE AUTO CUE D/A CONVERTER OUTPUTPORT AVSS1 AVDD1 OUTR

27、 OUTL FLAG IPFLAG TX ECM PC LRCK SRDATA BCLK DMUTE TRKV KICK VREF TRVSTR ECS TVD TRD FOD TBAL FBAL TOFS TES /TLOCK /FLOCK PLAY LDON WVEL SENSE MN35510(IC561):Digital servo & digital signal processor KD-S577 1-16 3. Description Pin No. symbolI/O O O O 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 2

28、0 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 Pin No. symbolI/O 42 41 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 O II II O BCLK LRCK SRDATA DVDD1 DVSS1 TX MCLK MDATA MLD I I I SENSE FLOCK TLOCK BLKCK SQCK O O O O

29、O O I III I SUBQ DMUTE STATUS I O O RST SMCK PMCK TRV TVD PC ECM ECS KICK TRD O O O O O O O I I I FOD VREF FBAL TBAL FE TE I I I I IRF ENV VDET OFT TRCRS I O RFDET BDO LDON Description Not used Not used Not used Connected to GND Digital audio interface output Power supply (Digital) Micom command clo

30、ck signal input Micom command load signal input Micom command data input Focus lock signal output Active :Low Sence signal output (Data is latched at signals rising point) Tracking lock signal output Active :Low sub-code - block - clock signal output Outside clock for sub-code Q resister input Sub-c

31、ode Q -code output Connected to GND Status signal (CRC,CUE,CLVS,TTSTOP,ECLV,SQOK) Reset signal input (L:Reset) Not used Not used Traverse enforced output Traverse drive output Not used Spindle motor drive signal (Enforced mode output) 3-State Spindle motor drive signal (Servo error signal output) Ki

32、ck pulse output Tracking drive output Focus drive output Reference voltage input pin for D/A output block (TVD,FOD,FBA,TBAL) Focus Balance adjust signal output Tracking Balance adjust signal output Focus error signal input(Analog input) Tracking error signal input(Analog input) RF envelope signal in

33、put(Analog input) Vibration detect signal input(H:detect) Off track signal input(H:off track) Track cross signal input RF detect signal input(L:detect) BDO input pin(L:detect) Laser ON signal output(H:on) I I I I/O I/O IIIIII Description Not used Not used TES PLAY WVEL ARF IREF DRF DSLF PLLF Trackin

34、g error shunt signal output(H:shunt) RF signal input Reference current input pin Bias pin for DSL Not used Loop filter pin for DSL Loop filter pin for PLL Power supply(Analog) Connected to GND(Analog) Not used Not used Not used Not used Not used IIII Connected to GND(for Xtal oscillation circuit) I

35、O I O O IIIIIIIIIIIIIIII Not used Not used Not used Not used Not used Not used Not used Not used Not used Pull up Connected to GND Connected to GND Connected to GND pull up pull up pull up Power supply(Digital) Lch audio output Connected to GND Rch audio output Power supply(for Xtal oscillation circ

36、uit) Input of 16.9344MHz Xtal oscillation circuit Output of Xtal oscillation circuit VCOF AVDD2 AVSS2 EFM PCK PDO SUBC SBCK VSS XI X2 VDD BYTCK CLDCK FLAG IPPLAG FLAG CLVS CRC DEMPH RESY IOSEL TEST AVDD1 OUT L AVSS1 OUT R RSEL SSEL MSEL PSEL CSEL MN35510 KD-S577 1-17 AN8806SB-W (IC501) : RF&Servo AM

37、P PD LD LDON LDP VCC RF- RF OUT RF IN C.AGC ARF C.ENV C.EA CS BDO BDO CS BRT OFTR /NRFDET GND PDAC PDBD PDF PDE PDER PDFR TBAL FBAL EF- EF OUT TE- TE OUT CROSS TE BPF VDET LD OFF VREF ENV 302425262322143 33 32 34 31 36 35 13 14 15 16 20 2 21 629728 27891017111219 ENV CURCUITRF DET AGC EQ BDO OFTR -

38、+ - + - + - +- + - + - + - + - + - + - + - + - + - + -+ - + - + - + VCBA VCBA VCBA VCBA - + 1.Pin layout 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 2.Block diagram KD-S577 1-18 35 36 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 1

39、4 13 12 11 10 9 8 7 6 5 4 3 2 1 3. Pin function PD AC FBAL TBAL PDFR PDER PDF PDE PD BD TE BPF VDET CROSS TE OUT TE- FE OUT FE- /NRFDET GND LD OFF VREF ENV OFTR C.AGC ARF C.ENV C.EA CS BDO BDO CS BRT LD LD ON LDP VCC RF- RF OUT RF IN PD Pin No.SymbolI/O I O I - - I O I I/O O I/O I/O I/O O I/O O O -

40、O O - O I O O I O I I I I/O I/O I I I II-V amp input I-V amp input I-V amp input I-V amp input E I-V amp gain control F I-V amp gain control Tracking balance control Focus balance control Inverse input pin for focus error amp Output pin of focus error Inverse input pin for tracking error amp Trackin

41、g error signal output Tracking error cross output Input pin of tracking error through BPF Vibration detection signal output Connect to ground Reference voltage output Function APC amp input terminal APC amp output terminal APC ON/OFF control terminal Envelope output Ground RF detection signal output

42、 Of-track status signal output BDO output pin A capacitor is connected to this terminal to detect the envelope of RF signal RF output Connecting pin of AGC loop filter RF input RFamp output Inverse input pin for RF amp Power supply Connect to ground A capacitor is connected to this terminal to detec

43、t the envelope of RF signal A capacitor is connected to detect the lower envelope of RF signal A capacitor is connected to detect the lower envelope of RF signal KD-S577 1-19 VCC2 V05- V05+ V04+ V04- V03+ V03- VC2+ V02- V01+ V01- VCC1 VIN1 VIN1G FR REV FWD S-GND VCONT VIN4 VIN4G VCC-S VREF-IN REG-OU

44、T REG-IN VIN3G VIN3 VIN2G VIN2 FR 28 27 26 25 24 23 22 21 20 19 18 17 16 15 FR 1 2 3 4 5 6 7 8 9 10 11 12 13 14 FR CH 3,4,5 Power supply Output control CH5 CH4 CH2 CH1 CH3 22K 11K 5VREG(PNPT r The outside puuting) 22K 22K 22K 11K 11K 11K CH1,2 Power supply LA6567H-X(IC541) : Servo BTL driver 1.Pin l

45、ayout & blockdiagram Level shiftLevel shiftLevel shiftLevel shift Thermal shutdown Input Signal system power supply KD-S577 1-20 2. Pin function 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Pin no.Symbol CH3,4,5 Power supply( It is short with VCC1,VCC-S) Loading output(

46、-) Loading terminal (+) CH4 Output terminal(+) CH4 Output terminal(-) CH3 Output terminal(+) CH3 Output terminal(-) CH2 Output terminal(+) CH2 Output terminal(-) CH1 Output terminal(+) CH1 Output terminal(-) CH1,2(BTL) Power supply(It is short with VCC-S,VCC2) CH1 Input terminal CH1 Input terminal(F

47、or gain adjustment) CH2 Input terminal CH2 Input terminal(For gain adjustment) CH3 Input terminal CH3 Input terminal(For gain adjustment) Regulator terminal(Outside putting PNP base) Regulator terminal(Outside putting PNP collector) Standard voltage input terminal Signal system power supply(It is sh

48、ort with VCC1,VCC2) CH4 Input terminal(For gain adjustment) CH4 Input terminal 5CH(VLO) Output voltag set terminal Signal system GND 5CH(VLO)Signal output switch terminal(FWD),Input of logic of loading part 5CH(VLO)Signal output switch terminal(REV), Input of logic of loading part Function VCC2 V05- V05+ V04+ V04- V03+ V03- V02+ V02- V01+ V01- VCC1 VIN1 VIN1G VIN2 VIN2G VIN3 VIN3G REG-IN REG-OUT VREF-IN VCC-S VIN4G VIN4 VCONT S-GND FWD REV LA6567H-X(2/2) Frame(FR)at the center bocomes sy