Jvc-THM-45-Service-Manual电路原理图.pdf
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1、SERVICE MANUALCOPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LIMITEDNo.MB0332003/11DVD DIGITAL CINEMA SYSTEMMB033200310TH-M45TABLE OF CONTENTS1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32 SP
2、ECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-73 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-84
3、ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-345 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4、 . . 1-39Area suffixB - U.K.E - Continental EuropeEN - Northern EuropeXV-THM45 SP-PWM45SP-THM45C SP-THM45F SP-THM45F SP-THM45S SP-THM45S1-2 (No.MB033)SPECIFICATIONDesign and specifications are subject to change without notice.Center unitAudio sectionTotal Harmonic Distortion 0.02%NOTE : This value i
5、s measured at System cord CONNECTOR for reference.Audio input sensitivity/Impedance (at 1 kHz)Analog input AUX IN 290 mV/47 kDigital input* DIGITAL IN (OPTICAL) -21 dBm to -15 dBm (660 nm 30 nm)* Corresponding to Linear PCM, Dolby Digital, and DTS Digital Surround (with sampling frequency - 32 kHz,
6、44.1 kHz, 48 kHz)Video sectionColor System PALHorizontal Resolution 500 linesSignal-to-Noise Ratio (Composite signal when “RGB“ is selected)64 dBVideo output level 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 Tuner sectionTuning Range FM 87.5 MHz to 108.0 MHzAM (MW) 522
7、kHz to 1629 kHzGeneralPower Requirements AC 230 V, 50 HzPower Consumption 20 W (at operation), 1.6 W (in standby mode)Dimensions (W H D) 400 mm 85 mm 386 mmMass 4.6 kgSubwooferAmplifier sectionFront/Center/Surround 80 W per channel, RMS at 6 at 1 kHz, with 10 % total harmonic distortion.Subwoofer 12
8、0 W, RMS at 4 at 100 Hz, with 10 % total harmonic distortion.Speaker sectionSpeaker unit 16 cm Bass-reflex, Magnetically ShieldedFrequency Range 30 Hz to 200 HzGeneralPower Requirements AC 230 V, 50 HzPower Consumption 150 W (at operation), 0 W (in standby mode)Dimensions (W H D) 216 mm 353 mm 485 m
9、mMass 12.0 kgSatellite SpeakersFront speakers (SP-THM45F)Speakers 8.0 cm Bass-reflex, Magnetically ShieldedPower Handling Capacity 80 WImpedance 6 Frequency Range 90 Hz to 20 kHzDimensions (W H D) 103 mm 115 mm 100 mmMass 0.64 kgSurround speakers (SP-THM45S)Speakers 8.0 cm Bass-reflex, Magnetically
10、ShieldedPower Handling Capacity 80 WImpedance 6 Frequency Range 90 Hz to 20 kHzDimensions (W H D) 103 mm 115 mm 100 mmMass 0.52 kgCenter speakerSpeakers 8.0 cm Bass-reflex, Magnetically ShieldedPower Handling Capacity 80 WImpedance 6 Frequency Range 90 Hz to 20 kHzDimensions (W H D) 103 mm 115 mm 10
11、0 mmMass 0.64 kgAccessoriesRemote control (1), Batteries (2), FM antenna (1), AM (MW) loop antenna (1), Power cord (1), System cord (1)Speaker codes5 m For satellite (front left/right) and center speakers (3)10 m For satellite speakers (surround left/right) (2) (The length of the above speaker cords
12、 are approximate.)(No.MB033)1-3SECTION 1PRECAUTION1.1 Safety Precautions(1) This design of this product contains special hardware andmany circuits and components specially for safety purpos-es. For continued protection, no changes should be madeto the original design unless authorized in writing by
13、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 design or circuitry of the product shouldnot be made. Any design alterations of the product shouldnot be made. Any design alter
14、ations or additions will voidthe manufacturers warranty and will further relieve themanufacture of responsibility for personal injury or propertydamage resulting therefrom.(3) Many electrical and mechanical parts in the products havespecial safety-related characteristics. These characteris-tics are
15、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. Replacement parts which have these specialsafety characteristics are identified in the Parts List of Ser-vice Manual. Elec
16、trical 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 does not have the same safety charac-teristics as the recommended replacement parts shown inthe Parts List of Service Manual m
17、ay 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, high temperature parts, moving parts and/orsharp edges for the prevention of electric shock and firehazard. When service is req
18、uired, 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 testingAfter reassembling the product, always perform an isola-tion check on the exposed metal parts of the product (an-tenna t
19、erminals, 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 isolation transformer during this check. Plug the AC line cord directly into the AC outlet. Using a“Leakage Current Tester“,
20、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. Any leakage cur-rent must not exceed 0.5mA AC (r.m.s.). Alternate check methodPlug the AC line cord directly into the AC out
21、let. 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 metal part and a known good earth ground.Measure the AC voltage across the resistor with the ACvoltmeter. Move the resist
22、or 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 plug in the AC outlet andrepeat each measurement. Voltage measured any mustnot exceed 0.75 V AC (r.m.s.). This corresponds
23、to 0.5mA AC (r.m.s.). 1.2 Warning(1) This equipment has been designed and manufactured tomeet international safety standards.(2) It is the legal responsibility of the repairer to ensure thatthese safety standards are maintained.(3) Repairs must be made in accordance with the relevantsafety standards
24、.(4) It is essential that safety critical components are replacedby approved parts.(5) If mains voltage selector is provided, check setting for localvoltage.1.3 CautionBurrs formed during molding may be left over on some partsof the chassis. Therefore, pay attention to such burrs in the case of pre-
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