Jvc-KDS-723-R-Service-Manual(1) 电路图 维修手册.pdf

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1、SERVICE MANUAL CD RECEIVER No.49693 Feb. 2002 COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD. KD-S723R/KD-S721R KD-S723R/KD-S721R Area Suffix E - Continental Europe EX - Central Europe Contents Safety precaution Preventing static electricity Important for laser products Location of main parts Disassemb

2、ly method 1-2 1-3 1-4 1-5 1-6 Adjustment method Flow of functional operation unit TOC read Maintenance of laser pickup Replacement of laser pickup Description of major ICs 1-11 1-12 1-14 1-14 1-15 COMPACT DIGITAL AUDIO KD-S721R KD-S723R 4 SCMMODE RNDRPTMO AM FM TP/PTY SELCD DISP 879101112 4 SCMMODE

3、RNDRPTMO AM FM TP/PTY SELCD DISP 879101112 KD-S723R LCD Color,Button Illumination- Amber KD-S721R LCD Color,Button Illumonation- Green Difference point RadioFans.CN 收音机爱 好者资料库 1-2 KD-S723R/KD-S721R ! Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention

4、to such burrs in the case 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 1-3 KD-S723R/KD-S721R Conductive material (conductive sheet) or iron plate (capti

5、on) Anti-static wrist strap Preventing 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 prevent this when performing repairs. 1.2. Han

6、dling 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. Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to the replacement

7、 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 connector. 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 resist

8、or that adjusts the laser power. Do not turn it 1.1.3. 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 cond

9、ition. (Refer to the text.) 2. Do not use 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. 1.1.2. Ground yourself 1. Use an anti-static wrist strap to release any static electricity built up in your body.

10、1.1.1. Ground the workbench 1. 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. 1.1. Grounding to prevent damage by static electricity Static electricity in the work area can destroy the

11、optical pickup (laser diode) in devices such as DVD players. Be careful to use proper grounding in the area where repairs are being performed. FD screw Feed motor assy FD gear Pickup unit Shorting Short circuit land RadioFans.CN 收音机爱 好者资料库 1-4 KD-S723R/KD-S721R Important for laser products 1.CLASS 1

12、 LASER PRODUCT 2.DANGER : Invisible laser radiation when open and inter lock failed or defeated. Avoid direct exposure to beam. 3.CAUTION : There are no serviceable parts inside the Laser Unit. Do not disassemble the Laser Unit. Replace the complete Laser Unit if it malfunctions. 4.CAUTION : The com

13、pact disc player uses invisible laserradiation and is equipped with safety switches whichprevent emission of radiation when the drawer is open and the safety interlocks have failed or are de feated. It is dangerous to defeat the safety switches. 5.CAUTION : If safety switches malfunction, the laser

14、is able to function. 6.CAUTION : Use of controls, adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. VARNING : Osynlig laserstrlning r denna del r ppnad och sprren r urkopplad. Betrakta ej strlen. VARO : Avattaessa ja suojalukitus o

15、hitettaessa olet alttiina nkymttmlle lasersteilylle.l katso steeseen. ADVARSEL : Usynlig laserstrling ved bning , nr sikkerhedsafbrydere er ude af funktion. Undg udsttelse for strling. ADVARSEL : Usynlig laserstrling ved pning,nr sikkerhetsbryteren er avslott. unng utsettelse for strling. REPRODUCTI

16、ON AND POSITION OF LABELS WARNING LABEL DANGER : Invisibie laser radiation when open and interlock or defeated. AVOID DIRECT EXPOSURE TO BEAM (e) VARNING : Osynlig laser- strlning r denna del r ppnad och sprren r urkopplad. Betrakta ej strlen. (s) VARO : Avattaessa ja suo- jalukitus ohitettaessa ole

17、t alttiina nkymttmlle lasersteilylle.l katso steeseen. (d) ADVARSEL :Usynlig laser- strling ved bning , nr sikkerhedsafbrydere er ude af funktion. Undg udst telse for strling. (f) CLASS 1 LASER PRODUCT !CAUTION Please use enough caution not to see the beam directly or touch it in case of an adjustme

18、nt or operation check. 1-5 KD-S723R/KD-S721R Main unit Location of main parts Control unit CD mechanism DisplayLED Digital: 0) RF signal Flow of functional operation until TOC read When the pickup correctly moves to the inner area of the disc TERMINAL Microprocessor commands FMO TC9462 53 FEED MOTOR

19、 +TERMINAL IC501 10 REST SW When the disc correctly rotates Tracking Servo Loop ON Servo CLV Rough Servo AccelerationAccelerationAcceleration Microprocessor commands Spindle motor (-) IC501 7 0.5 Sec 0.5 Sec 1 FEO 1-13 KD-S723R/KD-S721R Feed Section Focus Section Tracking Section Spindle Section Is

20、the voltage output at IC541 pin 53 5V or 0V? Check the feed motor. Is 4V present at both sides of the feed motor? Is the wiring for IC541 (90) (100) correct? Check IC501. Is 6V or 2V present at IC501 10 and 11? Is 5V present at IC501 pin 20? Check the feed motor connection wiring. Check the vicinity

21、 of IC541. 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 IC501 pins 14 18. Check the pickup and its connections. NO YES YES YES Does the S-search waveform appear at IC501 pins 6 and 7? Is the disk rotated? Does the RF signal appe

22、ar at TP1? Is 4V present at IC501 pins 8 and 9 ? Check the spindle motor and its wiring. Is 4V present at IC541 pin 55 ? Check the vicinity of IC501. Check IC521 and IC541. YES NO NO NO NONO YES YES YES Check the circuits in the vicinity of IC521 2 7, 1824 or the pickup Is the RF waveform at TP1 dis

23、torted? Proceed to the Tracking section When the disc is rotated at first: Check the circuit in the vicinity of IC521 pins 2 12. Check IC521. Check the pickup and its connections. YESYES YES Is the tracking error signal output at IC521 12? Approx. 1.2 V 4V 1-14 KD-S723R/KD-S721R Maintenance of laser

24、 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, the following symptoms will appear. (1) The level of RF output (EFM output:ampli tude of eye

25、 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 which is attached to the pickup is used to adjust the laser power.Since this adjustment should be

26、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 laser pickup should be replaced. If the semi-fixed resistor is adjusted while the pickup is functi

27、oning 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 Removal on the previous page) Plug the power cord in,and turn the power on. At this time,check th

28、at 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. 1-15 KD-S723R/KD-S721R 2 1 11 12 10 1513 14 5 4 6 38 9 7 Surge Protector BIASTSD UNIT R: C:F note1) TAB (header of IC) conn

29、ected to GND HA13164A(IC901):Regulator 1.Terminal layout 2.Block diagram 3.Pin function Pin No.SymbolFunction 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 REMOTE ANT ACC.IN VDD5V SW5V ACC5V ANT.CTRL MEMORY.IN MEM.DET 9V CTRL CD8V AJ ILL10V GND Output voltage is VCC-1 V when M or H level applied to CTRL pin.

30、Output voltage is VCC-1 V when M or H level to CTRL pin and H level to ANT-CTRL. Connected to ACC. Regular 5.7V. Output voltage is 5V when M or H level applied to CTRL pin. Output for ACC detector. L:ANT output OFF , H:ANT output ON Connected to VCC. Low battery detect. Output voltage is 9V when M o

31、r H level applied to CTRL pin. L:BIAS OFF, M:BIAS ON, H:CD ON Output voltage is 8V when H level applied to CTRL pin. Adjustment pin for ILM output voltage. Output voltage is 10V when M or H level applied to CTRL pin. Connected to GND. 123456789 10 11 12 13 14 15 Description of major ICs TAB REMOTE A

32、NT ACC.IN VDD5V SW5V ACC5V ANT.CTRL MEMORY.IN MEM.DET 9V CTRL CD8V AJ ILL10V GND 1-16 KD-S723R/KD-S721R UPD178078GF-561 (IC701) : System CPU 1.Pin layout 80 51 1 30 50 31 81 100 Pin NO. 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 29 30,31 32 33 34 35 36 37 38 39 40 41

33、42 43 44 45 - I I O O - I O O - O O O - O I I I I I I I I I - I I - - - - - - I - I - - I - I - NC BUSINT BUSSI BUSSO JBUS-SCK NC I2CDAI I2CDAO I2CCLK NC LCDDA LCDSCK BUSI/O NC LCDCE SW2 SW3 SW4 RSTSW NC KEY0 KEY1 KEY2 LEVEL AVDD SM SQ NC AVSS REGCPU VDD REGOSC X2 X1 GND0 SD/ST GND2 NC IFC VDDPLL OS

34、C NC I/OSymbolFUNCTION No connection JVC bus communication line JVC bus communication line JVC bus communication line JVC bus communication line No connection Serial data input Serial data output Serial clock output No connection LCD driver serial data output LCD driver serial clock output JVC bus o

35、utput select No connection LCD driver communication line CD mech switch CD mech switch CD mech switch Traverse mech rest switch No connection Key input Key input Key input Audio level input Power supply Signal level meter input Signal quality input Non connection Connect to GND Connect to GND with c

36、apacitor Power supply Connect to GND with capacitor System clock System clock Connect to GND Station detector & Stereo indicator Connect to GND No connection IF count input - FM,AM osc input No connection 2.Pin function (1/2) 1-17 KD-S723R/KD-S721R Pin NO. 46 47 48 49 50 51 52 53 54 55 56 57 58 59 6

37、0 6168 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 8998 99 100 - O O - I I I - O O O O - - - - O O O O I/O I/O I/O I/O O I I I I - O O O O I - - - - GNDPLL AMEQ FMEQ IC(VPP) RESET SW1 REMOCON NC TEL_MUTE POWER CDON MUTE STAGE 1 BUZZER STAGE 2 NC LM0 LM1 BUCK CCE BUS0 BUS1 BUS2 BUS3 R

38、ST PS1 PS2 DETACH RDSSCK GND1 MONO SEEK/STOP FM/AM AFCK RDSDATA PLLMONITOR NC VDDPORT GNDPORT I/OSymbolFUNCTION - PLL error output for AM PLL error output for FM Setting to write for flash System reset CD mech switch Remocon input Non connection TEL mute output Power control CD power control Mute co

39、ntrol - Non connection - Non connection CD mech driver control CD mech driver control CD LSI communication line CD LSI communication line CD LSI communication line CD LSI communication line CD LSI communication line CD LSI communication line CD LSI communication line ACC detection input Memory detec

40、tion Detach detection Clock input for RDS Connect to GND Mono by force Switching SEEK & STOP Band switch AFcheck output RDS data input Non connection Non connection Vdd Connect to GND 2.Pin function (2/2) UPD178078GF-561 1-18 KD-S723R/KD-S721R 11 620 1 4 10 15 25 13 14 16 12 9 8 5 7 2 22 17 19 18 21

41、 23 24 3 - + - + - + - + - + - + - + - + Muting & ON Time Control Circuit Protective circuit Protective circuit Mute circuit Ripple Filter Stand by Switch N.C + + 0.22 F 2200 F0.022 F 0.22 F +5V ST ON + + + + 47 F 0.22 F 0.22 F 22 F + Mute + 3.3 F Low Level Mute ON LA4743K(IC302):Power AMP 1.Block d

42、iagram 1-19 KD-S723R/KD-S721R 2.Terminal layout 3.Pin function LA4743K TAB GND1 OUTRR- STBY OUTRR+ VCC1/2 OUTFR- GND2 OUTFR+ VREF INRR INFR SGND INFL INRF ONTIME OUTFL+ GND3 OUTFL- VCC3/4 OUTRL+ MUTE OUTRL- GND4 NC 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 SymbolPin No.Functi

43、on Header of IC Power GND Outpur(-) for front Rch Stand by input Output (+) for front Rch Power input Output (-) for rear Rch Power GND Output (+) for rear Rch Ripple filter Rear Rch input Front Rch input Signal GND Front Lch input Rear Lch input Power on time control Output (+) for rear Lch Power G

44、ND Output (-) for rear Lch Power input Output (+) for front Muting control input Output (-) for front Power GND No connection VREF 1-20 KD-S723R/KD-S721R VCC2 V05- V05+ V04+ V04- V03+ V03- V02+ V02- V01+ V01- VCC1 VIN1 VIN1G FR REV FWD S-GND VCONT VIN4 VIN4G VCC-S VREF-IN REG-OUT REG-IN VIN3G VIN3 V

45、IN2G 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(PNPTr The outside putting) 22K 22K 22K 11K 11K 11K CH1,2 Power supply LA6567H-X(IC501):CD DRIVER 1.Pin layout & blockdiagram Level shif

46、tLevel shiftLevel shiftLevel shift Thermal shutdown Input Signal system power supply 1-21 KD-S723R/KD-S721R 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(-) Loading terminal (

47、+) 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(For gain adjustment) C

48、H2 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 short with VCC1,VCC2) C

49、H4 Input terminal(For gain adjustment) CH4 Input terminal 5CH(VLO) Output voltage 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 VIN2