JVC-THA35-ddcs-sm 维修电路原理图.pdf

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1、TH-A35TH-A35SERVICE MANUALDVD DIGITAL CINEMA SYSTEMContentsCOPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LTD. No. 22020Jun. 2003Safety precautions - 1- 2Preventing static electricity - 1- 3Important for laser products - 1- 4Disassembly method - 1- 5Description of major ICs - 1- 15Wiring connection - 1- 20

2、Area SuffixJ . U.S.A.C . CanadaCOMPACTSUPER VIDEOD I G I T A LS U R R O U N DD I G I T A L E XP R O L O G I CVOLUMEPHONESDSPSORROUNDSOURCESTANDBYSTANDBY/ONRadioFans.CN 收音机爱 好者资料库TH-A351-2Warning!CAUTIONGood earth groundPlace this probe on each exposedmetal part.AC VOLTMETER(Having 1000 ohms/v1500 10

3、Wolts,or more sensitivity)0.15 F AC TYPESafety Precautions1. This design of this product contains special hardware and many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufactur

4、er. Replacement parts must be identical to those used in the original circuits. Services should be performed by qualified personnel only.2. Alterations of the design or circuitry of the product should not be made. Any design alterations of the product should not be made. Any design alterations or ad

5、ditions will void the manufacturers warranty and will further relieve the manufacture of responsibility for personal injury or property damage resulting therefrom.3. Many electrical and mechanical parts in the products have special safety-related characteristics. These characteristics are often not

6、evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in the Parts List of Service Manual. Electrical comp

7、onents having such features are identified by shading on the schematics and by ( ! ) on the Parts List in the Service Manual. The use of a substitute replacement which does not have the same safety characteristics as the recommended replacement parts shown in the Parts List of Service Manual may cre

8、ate shock, fire, or other hazards. 4. The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be separated from live parts, high temperature parts, moving parts and/or sharp edges for the prevention of electric shock and fire hazard. When service is requ

9、ired, the original lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after re-assembling. 5. Leakage currnet check (Electrical shock hazard testing) After re-assembling the product, always perform an isolation check on the exposed metal par

10、ts of the product (antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock. Do not use a line isolation transformer during this check.? Plug the AC line cord directly into the AC outlet.

11、Using a Leakage Current Tester, measure the leakage current from each exposed metal parts of the cabinet, particularly any exposed metal part having a return path to the chassis, to a known good earth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.)? Alternate check method Plug the AC l

12、ine cord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms per volt or more sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15 F AC-type capacitor between an exposed metal part and a known good earth ground. Measure the AC voltage across the resi

13、stor with the AC voltmeter.Move the resistor connection to each exposed metal part, particularly any exposed metal part having a return path to the chassis, and meausre the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. Voltage measured Any must n

14、ot exceed 0.75 V AC(r.m.s.). This corresponds to 0.5 mA AC(r.m.s.). 1. This equipment has been designed and manufactured to meet international safety standards.2. It is the legal responsibility of the repairer to ensure that these safety standards are maintained.3. Repairs must be made in accordance

15、 with the relevant safety standards.4. It is essential that safety critical components are replaced by approved parts.5. If mains voltage selector is provided, check setting for local voltage.Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such

16、burrs in the case of preforming repair of this system.RadioFans.CN 收音机爱 好者资料库TH-A351-3Preventing static electricityElectrostatic 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). Ta

17、ke care to prevent this when performing repairs.1.1. Grounding to prevent damage by static electricityStatic electricity in the work area can destroy the optical pickup (laser diode) in devices such as DVD players.Be careful to use proper grounding in the area where repairs are being performed.1.1.1

18、. Ground the workbench1. 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.1.1.2. Ground yourself1. Use an anti-static wrist strap to release any static electricity built up in your body.1.

19、1.3. Handling the optical pickup1. 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 a tester t

20、o check the condition of the laser diode in the optical pickup. The testers internal power source can easily destroy the laser diode.1.2. 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. Cut off th

21、e 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 connector.3.

22、 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 strap1MTH-A351-41. CLASS 1 LASER PRO

23、DUCT2. CAUTION : Visible and invisible laser radiation when open and interlock 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 c

24、ompact disc player uses invisible laser radiation and is equipped with safety switches which prevent emission of radiation when the drawer is open and the safety interlocks have failed or are defeated. It is dangerous to defeat the safety switches. Important for laser productsREPRODUCTION AND POSITI

25、ON OF LABELSCLASS 1 LABELWARNING LABEL5. CAUTION : If safety switches malfunction, the laser 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.!CAUTION Please use enough caution not

26、to see the beam directly or touch it in case of an adjustment or operation check. VARNING : Osynlig laserstrlning r denna del r ppnad och sprren r urkopplad. Betrakta ej strlen.VARO : Avattaessa ja suojalukitus ohitettaessa olet alttiina nkymttmlle lasersteilylle. l katso steeseen. ADVARSEL : Usynli

27、g 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.CLASS 1LASER PRODUCTCLASS 1LASER PRODUCTTH-A351-52. PIN CONFIGURATIONDisassembly method?Removing th

28、e cabinet top?Removing the tray Door?Removing the cabinet front?Removing the TUNER and panel rear?Removing the MPEG BOARD?Removing the MAIN BOARD?Removing FAN?Removing the Thermal - Regifer?Removing the VCD mechanism base assembly?Removing PWB, AMP?Removing Power , fruformer?Removing the FRONT PWB &

29、 LED PWBCommence disassembly of this set by removing the main units and then proceed to the components and assemblies inside the units.TH-A351-6?Removing the cabinet top (See Fig.1)1. Unscrew the 6 serew A 2. Lift the cabinet top by holding the two sides of it, while moving it upward and backward.?R

30、emoving the Tray Door(See Fig.2)1. Eject the disc tray. (Rotate the screw B counter - clockwise if no supply)2. Lift up the tray door in the indicated directionFig.1CLASS 1LASER PRODUCTRight coverLeft coverTop coverRear coverFig.2BTH-A351-7Fig.3Fig.4Fig.5?Removing the cabinet front(See Fig.3)Caution

31、 You must ensure the TRAY door isnt its place before you remove the panel front from body.1. Unscrew the serew 2 C & 2 D.2. Pull the panel front toward yourself while pressing 5 stoppers to disengage.?Removing the TUNER and panel rear (See Fig.4)1. Unserew the screw H form mpeg board unit and unit a

32、nd main board unit. 2. Unserw the screw K form body.3. Take the supply cord out of panel rear.4. Remove teh panel rear with tuner .?Removing the MPEG BOARD (See Fig.5)Caution Mpeg board may be taken out only when the panel rear and Tunet have been taken away.1. Pull the cable connetor mpeg board.2.

33、Unscrew the screw M.3.Separate the mpeg board from main board vertically.DCSTOPPERSTOPPERSTOPPERSTOPPERSTOPPERCDMCLASS 1LASER PRODUCTHKTH-A351-8? Removing the MAIN Board ( See Fig.6 & 7 )CautionMain board may be taken out when the mpeg board has been taken away.1. Force the PCB spacer Q to exit the

34、holes of main board.2. Unscrew the screw P.3.Unscrew the screw R then you can remove the main board with heat sink.4.Untie or open connecters to power transformer, PWB,AMP, DVD - mech.? Removing FAN (See Fig.8)1.Unscreew 3 screws R with HOLDER, pull out connector from PWB, main.2.Unscrew 2 screws S

35、from HLDR.? Removing the Thermal - Regifer (See Fig.9)1.Unscreew the screws though power IC and thermal- HOLDER.2.Pull wire of thermal - register from PWB main.PQFig. 6Fig. 7Fig. 9Fig. 8RSPULLTH-A351-9? Removing the CD mechanism base assembly(See Fig.10)?Prior to performing the following procedure,

36、remove the cabinet front assembly.1. Disconnect the harnesses from connector CN191 and CN192 on the main board and release them from the cord stopper respectively.2. Remove the four screws M attaching the transformer assembly.? Removing PWB,AMP(See Fig.11)1. Unscrew 4 screws L.2. Pull out connecter

37、from PWB, AMP.? Removing Power, frusformer(See Fig.11)1. Unscrew 4 screws N2. Untie wire connecter to PWB, MAIN.Fig. 11Fig. 10TH-A351-10? Removing the front PWB & Led, PWB (See Fig.12-13)?Prior to performing the following procedure, remove the front panel assembly.1. Remove the seven screws X and 3

38、screws attaching the front panel board inside the front panel assembly.2. Push out KNOB, VOLUME through PWB, FR.Fig. 13Fig. 12TH-A351-111. Pin layput2. Block diagramDescription of major ICs?STK402-950 ( U701 ) : 5 channels AF power amplifier. 4200(unit: mm)3.6(12.0)2.016.521.032.027.34.023x2.0=46.00

39、.55.50.42.98.512478.070.0TH-A351-122. PIN CONFIGURATION?WM8770 ( U1 ) : 8-channel code c & volume control1. TH-A351-131.Block Diagram? UPD78F0034A ( IC 401 ) : CPUTH-A351-142.Outline of FunctionTH-A351-151. BLOCK DIAGRAM UPD 16315 ( IC904 ): VFD control ler / driverDescription of major ICsTH-A351-16

40、2. Pin Layout ( AK4112BVF )?AK4112 ( U17 ) : Digital audio receiver1. BLOCK DIAGRAMTH-A351-17? M29W160DB ( U12 ) : 16M Flash memory.Pim layoutDQ3DQ9DQ2A6DQ0WA3RBDQ6A8A9DQ13A17A10DQ14A2DQ12DQ10DQ15A1VCCDQ4DQ5A7DQ7NCNCAI03844M29W160DTM29W160DB121132425363748DQ8NCA19A1A18A4A5DQ1DQ11GA12A13A16A11BYTEA15

41、A14VSSEA0RPVSSTH-A351-18?2a3020 ( IC 701 ): DC - DC Regulator ?LX171/LX1711 ( IC603 ) : 1.5V InternalRegulatorsOscillator40 / 400 KHz 2 2.30/2.53V 0.7V1uA 34M 2 1 0 o h m( VIN8SYNC7EN5FB6COMP1.22VShutdownComparatorFrequencyFoldbackComparatorError Am plifiergm = 630uM/VoltLockoutComparatorCurrentSens

42、eAmp llflerCurrentComparator G N D V s wS B 1 0.7VSVC L KSRQQSlopeCompensationSLEEPVREFV25CNPVDDCPP+N+P-N-FAOUTFBK-FBK+VDDIS-CLOCKRPWMCPWMEAOUTEAININAMPOUTINPUT -INPUT +MUTEUVLO&REFERENCEOUTPUTDRIVERS&LOGICFAULTTIMER5VReference264110CLKOSCSYNC+-220mVPVDDMUXMUTEMUTE714139118652827251517FEEDBACK AMPER

43、ROR AMPCURRENT SENSEINPUT AMP162423222120SRQQCLK5VReference18Class-D mono power amplifier controllerTH-A351-19? IR2110 ( IC603,604 ): Low and nigh side driverFunctional Block Diagram? MC 14053B ( U21 ): digitally - controlled analog swithPin layoutVBSDLINVDDPULSEGENRSQVSSUVDETECTDELAYHVLEVELSHIFTVCC

44、PULSEFILTERUVDETECTVDD/VCCLEVELSHIFTVDD/VCCLEVELSHIFTLOVSCOMRSQRSRQHINHOYIY0Z1Z0INHVEEVDDYXX1X0ABCVSSZTH-A351-20Wiring connection No.22020SCHJun. 2003COPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LTD.TH-A35SCHEMATIC DIAGRAMSBlock diagramStandard schematic diagramsPrinted circuit boards2-12-22-202-31Conten

45、tsCD-ROM No.SML200306TH-A35DVD DIGITAL CINEMA SYSTEMArea SuffixJ . U.S.A.C . CanadaCOMPACTSUPER VIDEOD I G I T A LS U R R O U N DD I G I T A L E XP R O L O G I CVOLUMEPHONESDSPSORROUNDSOURCESTANDBYSTANDBY/ONTH-A35In regard with component parts appearing on the silk-screen printed side (parts side) o

46、f the PWB diagrams, the parts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the mark nearby are critical for safety. (This regulation does not correspond to J and C version.)TH-A352-1ABC12345Block DiagramTH-A352-2ABCD12345Standard schematic diagram

47、sAUDIO CODEC & AUDIO/VIDEO POSTSPDIF-INERFRX1RSTOMDMCML_4112MCLK_4112SEL-4112AIN1ALRCLKIMCLK_4112MDO_4112ML-8746AIN0AMCLK/8770MCTUN-INRAOUT1PH-LTUN-INLMDALKCLKOALRCLKIABCLKOAOUT2PH-RAUDIORST-SCART-LSCART-RAMCLKAMCLK/4112ABCLKIAUTOAOUT3AOUT033V33VD3333V33VD5V33VA5VD33+12VA-12VAD33+12VA-12VADSP_VCC33A

48、5VABCLKIALRCLKISPDIF-INERFAUDIORST-AIN1MDO_4112MDMCML_4112MCLK_4112AMCLKMCLK_4112SEL-4112A5VD3333VD5VML-8746MDMCAMCLK/8770ABCLKOALRCLKIALRCLKOAOUT3AOUT2AOUT1AOUT0TUN-INLPH-LPH-RTUN-INRAIN0+12VA-12VAAUDIORST-DSP_VCC33AUTOSCART-LSCART-RR5210K+C194100UF/16VR6322KR3610KC1750.1UC1800.1UF+C3210UF/16V+C222

49、100UF/6.3VFB1+C1310UF/16V+C4110UF/16VR4410KR47.5R427.5K+C16747UF/16VR2231K+C36100UF/10VQ152N3904213U17AK4112DVDD1DVSS2TVDD3V/TX4XTI5XTO6PDN7R8AVDD9AVSS10RX111RX2/IF012RX3/IF113RX4/IF214CM0/CDT028CM1/CDT127OCSK1/CCLK26OCKS0/CSN25MCKO124MCKO223DAUX22BICK21SDTO20LRCK19ERF18FS9617P/SN16AUTO15R1040C1890.

50、1U+C38100UF/10VR4810K+C17147UF/16VR16615KC220.1UJK1AV2-8.4-13312FB39C1810.1UFR181.8KC2022PFC1900.1UR20533K+C2810UF/16V+C4610UF/16VR311.8KR261.8KU1WM8770AIN1L1AIN1R2AIN2L3AIN2R4AIN3L5AIN3R6AIN4L7AIN4R8AIN5L9AIN5R10AIN6L11AIN6R12AIN7L13AIN7R14AIN8L15AIN8R16AINOPL17AINVGL18AINVGR19AINOPR20RECL21RECR22R