JVC-THC20-ddts-sm 维修电路原理图.pdf

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1、SERVICE MANUALCOPYRIGHT 2006 Victor Company of Japan, LimitedNo.MB5062006/3DVD DIGITAL THEATER SYSTEMMB50620063TH-C30J,TH-C30C,TH-C20J,TH-C20CLead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)TABLE OF CONTENTS1PRECAUTION. . . . . . . . . . . . . . . . . . . . .

2、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-42SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-73DISASSEMBLY . . . . . . . . . . . . . . . . . . . .

3、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-84ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-295TROUBLESHOOTING . . . . . . . . . .

4、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33XV-THC30SP-PWC30SP-THC40FSP-THC40CSP-THC40SXV-THC20SP-PWC20SP-THC20FSP-THC20CSP-THC20SRadioFans.CN 收音机爱 好者资料库1-2 (No.MB506)SPECIFICATIONCenter unit (XV-THC30/XV-THC20)*1: This value is

5、measured at System cord CONNECTOR for reference.*2: Corresponding to Linear PCM, Dolby Digital, and DTS Digital Surround (with sampling frequency -32 kHz, 44.1 kHz, 48 kHz)Subwoofer (SP-PWC30)Subwoofer (SP-PWC20)Audio sectionTotal Harmonic Distortion *10.02%Digital input *2DIGITAL IN (DBS) (OPTICAL)

6、 : -21 dBm to -15 dBm (660 nm 30 nm)Video sectionVideo SystemNTSCHorizontal Resolution500 linesSignal-to-Noise Ratio64 dBVideo output levelComposite : 1.0 V(p-p)/75 S-video-Y : 1.0 V(p-p)/75 S-video-C : 0.286 V(p-p)/75 Component-Y : 1.0 V(p-p)/75 Component-PB/PR : 0.7 V(p-p)/75 Video input sensitivi

7、ty/Impedance (VCR IN)Composite : 1.0 V(p-p)/75 S-video-Y : 1.0 V(p-p)/75 S-video-C : 0.286 V(p-p)/75 USB storageUSB specificationCompatible with the USB 2.0 Full-SpeedCompatible deviceMass Storage ClassCompatible file systemFAT16, FAT32Bus power supplyMax. 500 mATuner sectionTuning RangeFM : 87.5 MH

8、z to 108.0 MHzAM : 530 kHz to 1 710 kHzGeneralPower RequirementsAC 120 V , 60 HzPower Consumption25 W (at operation)0.6 W (in standby mode)Dimensions (W H D)400 mm 85 mm 316 mm (15-3/4 inches 3-3/8 inches 12-1/2 inches)Mass3.8 kg (8.4 lbs)Amplifier sectionFront/Center/Surround167 W per channel, RMS

9、at 3 at 1 kHz, with 10 % total harmonic distortion.Subwoofer167 W, RMS at 3 at 100 Hz, with 10 % total harmonic distortion.Speaker sectionSpeaker unit16 cm (6-5/16 inches) Bass-reflexPower Handling Capacity170 WImpedance3 Frequency Range30 Hz to 200 HzSound Pressure Level73 dB/WmGeneralPower Require

10、mentsAC 120 V , 60 HzPower Consumption160 W (at operation)0 W (in standby mode)Dimensions (W H D)170 mm 411 mm 458 mm (6-3/4 inches 16-3/16 inches 18-1/16 inches)Mass11.5 kg (25.4 lbs)Amplifier sectionFront/Center/Surround135 W per channel, RMS at 4 at 1 kHz, with 10 % total harmonic distortion.Subw

11、oofer135 W, RMS at 4 at 100 Hz, with 10 % total harmonic distortion.Speaker sectionSpeaker unit16 cm (6-5/16 inches) Bass-reflexPower Handling Capacity140 WImpedance4 Frequency Range30 Hz to 200 HzSound Pressure Level74 dB/WmGeneralPower RequirementsAC 120 V , 60 HzPower Consumption135 W (at operati

12、on)0 W (in standby mode)Dimensions (W H D)170 mm 411 mm 458 mm (6-3/4 inches 16-3/16 inches 18-1/16 inches)Mass11.5 kg (25.4 lbs)RadioFans.CN 收音机爱 好者资料库(No.MB506)1-3Satellite Speakers - SP-XTHC30Satellite Speakers - SP-XTHC20Designs & specifications are subject to change without notice.Front speaker

13、s(SP-THC40F)Type2-way 2-speaker Bass reflex type (Magnetically shielded Type)Speaker8.0 cm (3-3/16 inches) cone 11.5 cm (5/8 inches) dome 1Power Handling Capacity170 WImpedance3 Frequency Range80 Hz to 20 000 HzSound Pressure Level77 dB/WmDimensions (W H D)104.5 mm 139 mm 101 mm (4-1/8 inches 5-1/2

14、inches 4 inches)Mass0.56 kg (1.3 lbs) eachCenter speaker(SP-THC40C)Type2-way 2-speaker Bass reflex type (Magnetically shielded Type)Speaker8.0 cm (3-3/16 inches) cone 11.5 cm (5/8 inches) dome 1Power Handling Capacity170 WImpedance3 Frequency Range80 Hz to 20 000 HzSound Pressure Level77 dB/WmDimens

15、ions (W H D)137 mm 105 mm 104.5 mm (5-7/16 inches 4-3/16 inches 4-1/8 inches)Mass0.57 kg (1.3 lbs)Surround speakers(SP-THC40S)Type1-way Bass reflex typeSpeaker8.0 cm (3-3/16 inches) cone 1Power Handling Capacity170 WImpedance3 Frequency Range80 Hz to 20 000 HzSound Pressure Level70 dB/WmDimensions (

16、W H D)111.5 mm 148 mm 106.5 mm (4-7/16 inches 5-7/8 inches 4-1/4 inches)Mass0.56 kg (1.3 lbs) eachFront speakers(SP-THC20F)Type1-way Bass reflex type (Magnetically shielded Type)Speaker8.0 cm (3-3/16 inches) cone 1Power Handling Capacity140 WImpedance4 Frequency Range90 Hz to 20 000 HzSound Pressure

17、 Level78 dB/WmDimensions (W H D)106 mm 119.5 mm 102 mm (4-3/16 inches 4-3/4 inches 4-1/16 inches)Mass0.55 kg (1.3 lbs) eachCenter speaker(SP-THC20C)Type1-way Bass reflex type (Magnetically shielded Type)Speaker8.0 cm (3-3/16 inches) cone 1Power Handling Capacity140 WImpedance4 Frequency Range90 Hz t

18、o 20 000 HzSound Pressure Level78 dB/WmDimensions (W H D)106 mm 119.5 mm 102 mm (4-3/16 inches 4-3/4 inches 4-1/16 inches)Mass0.55 kg (1.3 lbs)Surround speakers(SP-THC20S)Type1-way Bass reflex typeSpeaker8.0 cm (3-3/16 inches) cone 1Power Handling Capacity140 WImpedance4 Frequency Range90 Hz to 20 0

19、00 HzSound Pressure Level76 dB/WmDimensions (W H D)106 mm 119.5 mm 102 mm (4-3/16 inches 4-3/4 inches 4-1/16 inches)Mass0.63 kg (1.4 lbs) each1-4 (No.MB506)SECTION 1PRECAUTION1.1Safety Precautions(1) This design of this product contains special hardware andmany circuits and components specially for

20、safety purpos-es. For continued protection, no changes should be madeto the original design unless authorized in writing by themanufacturer. Replacement parts must be identical tothose used in the original circuits. Services should be per-formed by qualified personnel only.(2) Alterations of the des

21、ign or circuitry of the product shouldnot be made. Any design alterations of the product shouldnot be made. Any design alterations or additions will voidthe manufacturers warranty and will further relieve themanufacture of responsibility for personal injury or propertydamage resulting therefrom.(3)

22、Many electrical and mechanical parts in the products havespecial safety-related characteristics. These characteris-tics are often not evident from visual inspection nor can theprotection afforded by them necessarily be obtained by us-ing replacement components rated for higher voltage, watt-age, etc

23、. Replacement parts which have these specialsafety characteristics are identified in the Parts List of Ser-vice Manual. Electrical components having such featuresare identified by shading on the schematics and by ( ) onthe Parts List in the Service Manual. The use of a substitutereplacement which do

24、es not have the same safety charac-teristics as the recommended replacement parts shown inthe Parts List of Service Manual may create shock, fire, orother hazards.(4) The leads in the products are routed and dressed with ties,clamps, tubings, barriers and the like to be separated fromlive parts, hig

25、h temperature parts, moving parts and/orsharp edges for the prevention of electric shock and firehazard. When service is required, the original lead routingand dress should be observed, and it should be confirmedthat they have been returned to normal, after reassem-bling.(5) Leakage shock hazard tes

26、tingAfter reassembling the product, always perform an isola-tion check on the exposed metal parts of the product (an-tenna terminals, knobs, metal cabinet, screw heads,headphone jack, control shafts, etc.) to be sure the productis safe to operate without danger of electrical shock.Do notuse a line i

27、solation transformer during this check. Plug the AC line cord directly into the AC outlet. Using aLeakage Current Tester, measure the leakage currentfrom each exposed metal parts of the cabinet, particular-ly any exposed metal part having a return path to thechassis, to a known good earth ground. An

28、y leakage cur-rent must not exceed 0.5mA AC (r.m.s.). Alternate check methodPlug the AC line cord directly into the AC outlet. Use anAC voltmeter having, 1,000 per volt or more sensitivityin the following manner. Connect a 1,500 10W resistorparalleled by a 0.15F AC-type capacitor between an ex-posed

29、 metal part and a known good earth ground.Measure the AC voltage across the resistor with the ACvoltmeter. Move the resistor connection to each exposed metalpart, particularly any exposed metal part having a returnpath to the chassis, and measure the AC voltage acrossthe resistor. Now, reverse the p

30、lug in the AC outlet andrepeat each measurement. Voltage measured any mustnot exceed 0.75 V AC (r.m.s.). This corresponds to 0.5mA AC (r.m.s.). 1.2Warning(1) This equipment has been designed and manufactured tomeet international safety standards.(2) It is the legal responsibility of the repairer to

31、ensure thatthese safety standards are maintained.(3) Repairs must be made in accordance with the relevantsafety standards.(4) It is essential that safety critical components are replacedby approved parts.(5) If mains voltage selector is provided, check setting for localvoltage.1.3CautionBurrs formed

32、 during molding may be left over on some partsof the chassis. Therefore, pay attention to such burrs in the case of pre-forming repair of this system.1.4Critical parts for safetyIn regard with component parts appearing on the silk-screenprinted side (parts side) of the PWB diagrams, the parts that a

33、reprinted over with black such as the resistor ( ), diode ( )and ICP ( ) or identified by the mark nearby are criticalfor safety. When replacing them, be sure to use the parts of thesame type and rating as specified by the manufacturer. (This regulation dose not Except the J and C version)Good earth

34、 groundPlace this probe on each exposedmetal part.AC VOLTMETER(Having 1000 ohms/volts,or more sensitivity)1500 10W0.15 F AC TYPE(No.MB506)1-51.5Preventing static electricityElectrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy

35、 the laserdiode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.1.5.1 Grounding to prevent damage by static electricityStatic electricity in the work area can destroy the optical pickup (laser diode) in devices such as laser products. Be careful to use proper

36、 grounding in the area where repairs are being performed. (1) Ground the workbenchGround the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing thetraverse unit (optical pickup) on it.(2) Ground yourselfUse an anti-static wrist strap to relea

37、se any static electricity built up in your body. (3) Handling the optical pickup In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement opticalpickup are shorted. After replacement, return the shorted parts to their original condition.

38、 (Refer to the text.) Do not use a tester to check the condition of the laser diode in the optical pickup. The testers internal power source can easilydestroy the laser diode. 1.6Handling the traverse unit (optical pickup)(1) Do not subject the traverse unit (optical pickup) to strong shocks, as it

39、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 thereplacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long a

40、time when attaching it to the connector. (3) Handle the flexible cable carefully as it may break when subjected to strong force. (4) I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.1.7Attention when traverse unit is decomposed*Please refer to Disass

41、embly method in the text for the pickup unit. Apply solder to the short land sections before the flexible wire is disconnected from the connecto on the servo board. (If the flexiblewire is disconnected without applying solder, the pickup may be destroyed by static electricity.) In the assembly, be s

42、ure to remove solder from the short land sections after connecting the flexible wire.1MConductive material(conductive sheet) or iron palate(caption)Anti-static wrist strapDouble Soldering pointMotorface tapeCard wire1-6 (No.MB506)1.8Importance administering point on the safetyGraphic symbol mark (Th

43、is symbol means slow blow type fuse.)FOR CONTINUED PROTECTION AGAINST RISKOF FIRE, REPLACE ONLY WITH SAME TYPEAND RATING OF FUSES ;should be read as follows ;F901 : T1AH 250VF901 : T1AH 250VFull Fuse Replacement MarkingFUSE CAUTIONLe symbole graphique (Ce symbole signifiefusible de type a fusion len

44、t.)POUR UNE PROTECTION CONTINUE CONTREDES RISQUES DINCENDIE, REMPLACERSEULEMENT PAR UN FUSIBLE DU MEME TYPE ;Marquage Pour Le RemplacementComplet De FusiblePRECAUTIONS SUR LES FUSIBLESdoit etre interprete comme suit ;Graphic symbol mark (This symbol means fast blow type fuse.)FOR CONTINUED PROTECTIO

45、N AGAINST RISKOF FIRE, REPLACE ONLY WITH SAME TYPEAND RATING OF FUSES ;should be read as follows ;F101 : 8A 125VF153 : 10A 125VF154 : 10A 125VF101 : 8A 125VF153 : 10A 125VF154 : 10A 125VFull Fuse Replacement MarkingFUSE CAUTIONLe symbole graphique (Ce symbole signifiefusible de type a fusion rapide.

46、)POUR UNE PROTECTION CONTINUE CONTREDES RISQUES DINCENDIE, REMPLACERSEULEMENT PAR UN FUSIBLE DU MEME TYPE ;Marquage Pour Le RemplacementComplet De FusiblePRECAUTIONS SUR LES FUSIBLESdoit etre interprete comme suit ;fast blow type / type a fusion rapideB5203CN274B5504B5218B5220FC157D151D153B5605D514B

47、5221FC158B5701B5303FC156C164B5224B5223B5304B5222B5606B5802B5305B5106C523C512D152FC155D154C163B5302B5040D550D549B5202B5001B5112B5101B5901B5204B5002B5205C503D506B5206B5207D541B5208B5003B5502B5402D601C3715R3727R3720B5035C3720B5036D3706B5219C3716D3708Q3704D3707B5406B5102B5021B5022B2214C3504B5024C3502B50

48、25C161C162D3502B2215L2102R2115B5043D3501C3503D510B5041D551C3602C3604D3602B5042D3601B2023CN372C101FC102D101FC101RY101D515D516D535CN502R3719D3703C3721R685R686R555CN151CN371CN101FW501S901CN102FC103FC104B5301B5201HS151B5225B5803B5306B5505B5004B5607D901L901D902D903PC901D992B4701P901FC901FC902T901B4301C91

49、1C908C904C992C916C912C907C905C909C903C914C913R921R951R901B4302B4101B4202W914C902R922B4146TH901D904R903D956D4811B4305R4811B4306D4705R4708B4802C4451C4441C4431B4207B4113B4403B4201HS901IC901B4605B4507B4407B4133B4135B4211B4320B4212B4321B4138B4139B4140B4141B4214B4217B4149B4218R973Q982B4150B4151R982Q983W92

50、1C983D981slow blow type / type a fusion lent(No.MB506)1-7SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.1-8 (No.MB506)SECTION 3DISASSEMBLY3.1Main body3.1.1Removing the top cover (See Fig.1 and 2)(1) Remove the four screws A (both side) attac