JVC-THA10-ddcs-sm维修电路原理图.pdf

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1、SERVICE MANUAL No.20872 Sep. 2000 COPYRIGHT 2000 VICTOR COMPANY OF JAPAN, LTD. Printed in Japan 200009(S) No.20872 DVD DIGITAL THEATER SYSTEM TH-A10R/TH-A10TH-A10R/TH-A10 TH-A10R TH-A10 XV-THA10R (DVD player)/XV-TH-A10 SP-THA10 (Speaker section) SP-PWA10 (Powered subwoofer) SP-XCA10 (Center speaker)

2、 SP-XSA10 (Satellite speaker) x 4 Contents Safety Precautions Important for laser products Preventing static electricity Disassembly method Adjustment method Flow of functional operation until TOC read Maintenance of laser pickup Replacement of laser pickup Description of major ICs 1-2 1-3 1-4 1-5 1

3、-21 1-24 1-25 1-25 1-26 Area Suffix TH-A10R B EN EE U.K. Northern Europe Russia Area Suffix TH-A10 EContinental Europe VICTOR COMPANY OF JAPAN, LIMITED OPTICAL DISC BUSINESS DIV. PERSONAL Region cord. 3) Press Enter button. And EEPROM initialize start. 4) When indicate 96kHz EEPROM on the display ,

4、initialize finished. Note : During the EEPROM initialization the keys may not be operated. Press the POWER key to initiate the STAND-BY mode and the test mode will then be cancelled. Adjustment and confirmation matter 1.The oscilloscope is connected between 1(RFOP) of CN104 and 2(GND). 2.Reproductio

5、n of the test disc (VT-501) made by JVC. 3.It is confirmed that RF LEVEL is 350mVp-p 150mVp-p. 4.When there is disorder in the waveform road cuts etc, test disk is exchanged and measured. 1. The CD jitter meter is connected between 11(GND) of CN104 and 12(FLTOUT). The RF level is observed at the sam

6、e time. 2.The first test disk(CTS-1000) made of JVC is reproduced. 3.It is confirmed that RF LEVEL is 360 100mVp-p. 5. When there is disorder in the waveform road cuts etc, test disk is exchanged and measured. FRONT SIDE P12 and GND P1 and GND Main Adjustment DVD SERVO CONTROL PWB TH-A10R/TH-A10 1-2

7、2 MeasurementAdjustment point Refer to Fig.2 Mode Reproduction part Disc Measurement machine No need Flap adjustment of the Pick-up guide shaft adjusts Tangential adjustment machine screw A and Tilt adjustment machine screw B from the DVD Mechanism Assy bottom. 1. The part at the center on the DVD t

8、est disc is reproduced. 2.The flap adjustment screws is turned alternately and adjusted like clearly seeing the waveform of CN1041 to the way. Note 1.The tangential adjustment is done finish and, then, tilt is adjusted. 2.The repeat the adjustment 2-3 times,for best result. 3.The final adjustment sh

9、ould be tilt adjustment. VT-501 DVD Mechanism Assy Stand Stand 200mm DVD player Fig.1 CN101 of DVD Servo Control PWB CN11 of Connection PWB Extension Cord connections Refer to Fig.1 Extension cord No. QUQ110-3740AM General tool : Hex-head wrench (1.27 mm) (4) Flap adjustment of the Pick-up guide sha

10、ft 1) Make sure that there is no disc on the tray. 2) Press both the PLAY and OPEN/CLOSE keys of the main unit to activate the primary power and ( ; Version3, ; Region cord) will be displayed on the FL indicator. Note: If the FL indicator display stops and remains at TEST 0, unplug the power cord fr

11、om the outlet and after waiting at least 1 second, plug it in again. After the tray open/close procedure has completed, unplug it again and then perform the initialization procedure again. 3) Press the OPEN/CLOSE key of the main unit to draw the tray out. *Place the test disk (VT-501) on the tray an

12、d then press the OPEN/CLOSE key. (Note: Pushing the tray to close it is not possible.) 4) Press the PLAY key of the main unit. 5) The JIT 0000 is displayed on the FL indicator. Set the FL indicator figure value to its minimum by adjusting the pickup guide shaft flap. * The test mode is cancelled whe

13、n the power is turned off. TH-A10R/TH-A10 1-23 Confirmation after adjustment. Confirm to reproduce video CD and CD after the DVD test disc is adjusted and to find abnormality. (5) About keeping the disc As for the DVD test disc, plane accuracy is demanded.Please note the keeping place on the disc. 1

14、. Please do not put the disc directly on the work desk etc. after uses . 2. To keep the planarity of the disc, politely handle ,and please put in a special case and keep the disc vertically after uses . Please keep keeping the disc in a cool place where direct sunshine and the air-conditioning wind

15、do not drive. 3. When the disc curves,an accurate adjustment cannot be done. Please exchange for a new test disc and adjust optics. 4. Other discs might not be able to be reproduced when adjusting on a curved disc. A AB Fig.2 Point of adjustment * Please execute the static electricity protection mea

16、sures before starting the adjustment. * When the following parts are exchanged,optical adjustment Adjust the flap of the disc motor is necessary. 1.The disc motor was exchanged. 2.The laser pick up was exchanged. 3.The traverse motor unit was exchanged. Note Additionally, please adjust the flap of t

17、he disc motor when the picture quality deterioration is seen .The basic adjustment though, is unnecessary for part exchange in the traverse. An optical adjustment in the laser pick up cannot be done. Please adjust the flap of the disc motor after exchanging the laser pick up. * When the traverse uni

18、t is exchanged, the adjustment is basically unnecessary. TH-A10R/TH-A10 1-24 Precautions for Service Handling of Traverse Unit and Laser Pickup 1. Do not touch any peripheral element of the pickup or the actuator. 2. The traverse unit and the pickup are precision devices and therefore must not be su

19、bjected to strong shock. 3. Do not use a tester to examine the laser diode. (The diode can easily be destroyed by the internal power supply of the tester.) 4. To replace the traverse unit, pull out the metal short pin for protection from charging. 5. When replacing the pickup, after mounting a new p

20、ickup, remove the solder on the short land which is provided at the center of the flexible wire to open the circuit. 6. Half-fixed resistors for laser power adjustment are adjusted in pairs at shipment to match the characteristics of the optical block. Do not change the setting of these half-fixed r

21、esistors for laser power adjustment. Destruction of Traverse Unit and Laser Pickup by Static Electricity Laser diodes are easily destroyed by static electricity charged on clothing or the human body. Before repairing peripheral elements of the traverse unit or pickup, be sure to take the following e

22、lectrostatic protection: 1. Wear an antistatic wrist wrap. 2. With a conductive sheet or a steel plate on the workbench on which the traverse unit or the pick up is to be repaired, ground the sheet or the plate. 3. After removing the flexible wire from the connector (CN101), short-circuit the flexib

23、le wire by the metal clip. 4. Short-circuit the laser diode by soldering the land which is provided at the center of the flexible wire for the pickup. After completing the repair, remove the solder to open the circuit. Short-circuit TH-A10R/TH-A10 1-25 1 2 3 4 5 6 7 8 9 10 11 33 32 31 30 29 28 27 26

24、 25 24 23 12 13 14 15 16 17 18 19 20 21 22 44 43 42 41 40 39 38 37 36 35 34 SDOS OCKS MIS BCLK LRCK SDTI1 SDTI2 SDTI3 SDTO DAUX DFS VREFL RIN+ RIN- LIN+ LIN- ROUT1 LOUT1 ROUT2 LOUT2 ROUT3 LOUT3 DEM1 DEM0 MCKO DVDD DVSS PD XTS ICKS1 ICKS0 CAD1 CAD0 CDTO CDTI CCLK CS PIS XTO XTI AVSS AVDD VREFH VCOM L

25、IN+ LIN- RIN+ RIN- LOUT1 ROUT1 LOUT2 ROUT2 LOUT3 ROUT3 LPF LPF LPF LPF LPF LPF DAC DAC DAC DAC DAC DAC DATT DATT DATT DATT DATT DATT ADC ADC HPF HPF Audio I/F MCLK BICK LRCK SDOUT SDIN1 SDIN2 SDIN3 SDTO SDTI1 SDTI2 SDTI3 SDOS DAUX Format Converter AL4527 (IC601): A/D, D/A Converters 1. Terminal layo

26、ut 2. Block diagram Discription of major ICs TH-A10R/TH-A10 1-26 SDOS OCKS MIS BCLK LRCK SDTI1 SDTI2 SDTI3 SDTO DAUX DFS DEM1 DEM0 MCKO DVDD DVSS PD XTS ICKS1 ICKS0 CAD1 CAD0 LOUT3 ROUT3 LOUT2 ROUT2 LOUT1 ROUT1 LIN- LIN+ RIN- RIN+ VREF VCOM VREFH AVDD AVSS XTI XTO PIS CS CCLK CDTI CDTO Functions I/O

27、 I I I I I/O I I I O I I I I - - - I I I I I I O O O O O O I I I I O O - - - O I I I I I I I I/O I 3. 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 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 SDTO source select terminal L: Internal ADC output H: DAUX inp

28、ut Serial control mode select terminal L: 3-wire serial H: IC bus Soft mute terminal H: Starting Soft mute L: Cancel Audio serial data clock terminal Input channel clock terminal DAC1 audio serial data input terminal DAC2 audio serial data input terminal DAC3 audio serial data input terminal Audio s

29、erial data output terminal Auxiliary audio serial data input terminal 2x sampling mode terminal L: Ordinal speed H: 2x speed De-emphasize 1 terminal De-emphasize 2 terminal Power terminal for output buffer 2.7 5.5 V Digital power supply terminal 4.5 5.5 V Digital ground terminal 0 V Power down & res

30、et terminal L: Power is down and register is initialized. Input clock selection 2 terminals Input clock selection 1 terminals Input clock selection 0 terminals Chip address 1 terminal Chip address 0 terminal DAC3 L channel analog output terminal DAC3 R channel analog output terminal DAC2 L channel a

31、nalog output terminal DAC2 R channel analog output terminal DAC1 L channel analog output terminal DAC1 R channel analog output terminal L channel analog reverse input terminal L channel analog non-reverse input terminal R channel analog reverse input terminal R channel analog non-reverse input termi

32、nal Zero input detection terminal L: P/S = H COMMON voltage output terminal Reference voltage input terminal Analog power supply terminal 4.5 5.5 V Analog ground terminal 0 V Zero input detection terminal L: P/S = H Master clock input terminal Parallel/serial select terminal L: Serial control mode H

33、: Parallel control mode Audio data interface format 0 terminal (with parallel control mode) Chip select terminal (with 3-wire serial control mode) Audio data interface format 0 terminal (with parallel control mode) Control data clock terminal (with serial control mode) Loopback mode 0 terminal (with

34、 parallel control mode) Control data input terminal (with serial control mode) Loopback mode 1 terminal Pin No. Symbol TH-A10R/TH-A10 1-27 INSTRUCTION REGISTERINSTRUCTION DECODE, CONTROL AND CLOCK GENERATION ADD. BUFFERS DATA REGISTER 16 R/W AMPS AND AUTO ERASE 16 DECODER EEPROM 4096bit 256 x 16 VPP

35、 SW VREF VPP GENERATOR DO DI CS SK PE 1 2 3 4 PE VCC CS SK NC GND DO DI 8 7 6 5 8 PIN SOP Pin no. Symbol 1 PE 2 VCC 3 CS 4 SK 5 DI 6 DO 7 GND 8 NC Function Program enable (With built-in pull-up resistor) Power supply Chip selection Cereal clock input Cereal data input Cereal data output Ground No co

36、nnection NOTE : The pull-up resistor of the PE pin is about 2.5M (VCC=5V) AK93C65AF-X (IC403) : EEPROM 1.Terminal layout 2.Block diagram 3.Pin function TH-A10R/TH-A10 1-28 1.Pin layout 2.Block diagram AN8706FHQ (IC101) : Front end processor AN8706FHQ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 2

37、0 21 22 23 24 25 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 CBDOFS RBCA TESTSG RFINP RFINN VCC2 GND2 VREF2 COFTFS COF

38、TSL RFON RFOP TS DCRF FS VIN6 VIN5 VCC1 VIN1 VIN2 VIN3 VIN4 VREF4 DIFP DIFN CBDOSL CSAG DCAGC AGCG PEAK BOTTOM RFENV FC BOOST OFTR BDO JITOUT GND3 FUPDN ITDLI VCOIN PLFLT PLFLT2 FCPO PCPO VCC3 CAPA DTRD IDGT VCC5 RDCKP RDCKN RDTP RDTN GND5 GND4 VCC4 DTMONN DTMONP DSLFLT DSLO FLTOUT DCFLT VREF3 VPWBD

39、O VPWOFT IDDLY DBAL GND1 VREF1 TKCNT TKCFLT TEOUT TEI RSCL LDONB LDONA LPCOA LPC1 VHARF TGBAL POFLT PTH TBAL TG FGCTL FBAL FEOUT FEN VREFL VREFC VREFH PULIN SEN SCK STDI STNBY XTRON MTRON ROMRAM FE(SSD) FE BAL TE(DPD) TE BAL TG(DPD) LPC(Amp)VREF reg MU BDO Det RF ENV AGC EQ OFTR Det INTERFACE DSL PL

40、L DFLTOP/NRFENV RFIN TGTETKCNTTBALFBALFE Head Amp. SSD Signal Head Amp. DPD Signal FC/Boost AGC Cont RFOUT FS/TS JITTER Det DSLOUT JITOUT BDO OFTR CLK DATA SYNC TKCNT OPTICAL HEAD (650nm) TGBALCPUSTNBYMTRONSERVO PROCESSOR Head Amp. TH-A10R/TH-A10 1-29 Pin No.SymbolI/OFunctions 1 2 3 4 5 6 7 8 9 10 1

41、1 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 42 43 44 45 46 47 48 49 50 I I O I O I O I I O I I O I O O O I I I I I I I I O I O O O O O I I I I O O O O O O O I O O O O O O LDONB LDONA LPCOA LPC1 VHARF TGBAL POFLT PTH TBAL TG FGCTL FBAL FEOUT FEN VREFL V

42、REFC VREFH PULIN SEN SCK STDI STNBY XTRON MTRON ROMRAM RSCL TEI TEOUT TKCFLT TKCNT VREF1 GND1 DBAL IDDLY VPWOFT VPWBDO VREF3 DCFLT FLTOUT DSLO DSLFLT DTMONP DTMONN VCC4 GND4 GND5 RDTN RDTP RDCKN RDCKP Laser ON (CD Head) terminal Laser ON (DVD Head) terminal Laser drive output terminal Laser PIN inpu

43、t terminal VHALF voltage output terminal Tangential phase balance control terminal Track detection Threshold value level terminal Track detection Threshold value level terminal Tracking balance control terminal Tangential phase error signal output terminal Focus amplifier Gain control terminal Focus

44、 balance control terminal Focus error signal output terminal Focus error output amplifier reversing input terminal VREFL voltage output terminal VREFC voltage output terminal VREFH voltage output terminal DSL,PLL drawing mode switch terminal SEN(Cereal data input terminal) SCK(Cereal data input term

45、inal) STDI(Cereal data input terminal) Standby mode control terminal Tracking OFF holding input terminal Monitor output ON/OFF switch terminal ROM . RAM switch terminal Standard current source terminal Tracking error output Amp reversing input terminal Tracking error signal output terminal Track cou

46、nt detection filter terminal Track count output terminal VREF1 voltage output terminal Earth terminal 1 Data slice offset adjustment terminal Data slice delay adjustment terminal OFTR detection level setting terminal BDO detection level setting terminal VREF3 voltage output terminal Capacity connect

47、ion terminal for data slice input filter Filter amplifier output terminal Data slice single data output terminal Constant filter terminal when data is sliceddelly PLL differential motion 2 making to value edge signal moniter output (+) PLL differential motion 2 making to value edge signal moniter ou

48、tput (-) Power terminal 4 (5V) Earth terminal 4 Earth terminal 5 PLL differential motion making to synchronization RF signal reversing output PLL differential motion making to synchronization RF signal rotation output PLL differential motion making synchronization clock reversing output PLL differen

49、tial motion making synchronization clock rotation output 3.Pin function AN8706FHQ (1/2) TH-A10R/TH-A10 1-30 I/OPin No.SymbolFunctions 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 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 I I I I I O O O O I O I O O O O I I O O O O O O O O O I I I I O O O O O O O O O I I I I I I I O