JVC-THM45-ddcs-sm维修电路原理图.pdf
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1、SERVICE MANUAL COPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LIMITED No.MB033 2003/11 DVD DIGITAL CINEMA SYSTEM MB033200310 TH-M45 TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2、1-3 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3、 1-8 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-34 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4、 . . . . . 1-39 Area suffix B - U.K. E - Continental Europe EN - Northern Europe XV-THM45SP-PWM45 SP-THM45CSP-THM45FSP-THM45F SP-THM45SSP-THM45S RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB033) SPECIFICATION Design and specifications are subject to change without notice. Center unit Audio section Total Harmon
5、ic Distortion0.02% NOTE : This value is measured at System cord CONNECTOR for reference. Audio input sensitivity/ Impedance (at 1 kHz) Analog inputAUX IN290 mV/47 k Digital input*DIGITAL IN (OPTICAL)-21 dBm to -15 dBm (660 nm 30 nm) * Corresponding to Linear PCM, Dolby Digital, and DTS Digital Surro
6、und (with sampling frequency - 32 kHz, 44.1 kHz, 48 kHz) Video section Color SystemPAL Horizontal Resolution500 lines Signal-to-Noise Ratio (Composite signal when RGB is selected) 64 dB Video output levelComposite1.0 V(p-p)/75 S-video-Y1.0 V(p-p)/75 S-video-C0.286 V(p-p)/75 Tuner section Tuning Rang
7、eFM87.5 MHz to 108.0 MHz AM (MW)522 kHz to 1629 kHz General Power RequirementsAC 230 V, 50 Hz Power Consumption20 W (at operation), 1.6 W (in standby mode) Dimensions (W H D)400 mm 85 mm 386 mm Mass4.6 kg Subwoofer Amplifier section Front/Center/Surround80 W per channel, RMS at 6 at 1 kHz, with 10 %
8、 total harmonic distortion. Subwoofer120 W, RMS at 4 at 100 Hz, with 10 % total harmonic distortion. Speaker section Speaker unit16 cm Bass-reflex, Magnetically Shielded Frequency Range30 Hz to 200 Hz General Power RequirementsAC 230 V, 50 Hz Power Consumption150 W (at operation), 0 W (in standby mo
9、de) Dimensions (W H D)216 mm 353 mm 485 mm Mass12.0 kg Satellite Speakers Front speakers (SP-THM45F) Speakers8.0 cm Bass-reflex, Magnetically Shielded Power Handling Capacity80 W Impedance6 Frequency Range90 Hz to 20 kHz Dimensions (W H D)103 mm 115 mm 100 mm Mass0.64 kg Surround speakers (SP-THM45S
10、) Speakers8.0 cm Bass-reflex, Magnetically Shielded Power Handling Capacity80 W Impedance6 Frequency Range90 Hz to 20 kHz Dimensions (W H D)103 mm 115 mm 100 mm Mass0.52 kg Center speaker Speakers8.0 cm Bass-reflex, Magnetically Shielded Power Handling Capacity80 W Impedance6 Frequency Range90 Hz to
11、 20 kHz Dimensions (W H D)103 mm 115 mm 100 mm Mass0.64 kg Accessories Remote control (1), Batteries (2), FM antenna (1), AM (MW) loop antenna (1), Power cord (1), System cord (1) Speaker codes 5 mFor satellite (front left/right) and center speakers (3) 10 mFor satellite speakers (surround left/righ
12、t) (2) (The length of the above speaker cords are approximate.) RadioFans.CN 收音机爱 好者资料库 (No.MB033)1-3 SECTION 1 PRECAUTION 1.1Safety Precautions (1) This design of this product contains special hardware and many circuits and components specially for safety purpos- es. For continued protection, no ch
13、anges should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services should be per- formed by qualified personnel only. (2) Alterations of the design or circuitry of the product should not b
14、e made. Any design alterations of the product should not be made. Any design alterations or additions 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 i
15、n the products have special safety-related characteristics. These characteris- tics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by us- ing replacement components rated for higher voltage, watt- age, etc. Replacement parts which have th
16、ese special safety characteristics are identified in the Parts List of Ser- vice Manual. Electrical components 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
17、charac- teristics as the recommended replacement parts shown in the Parts List of Service Manual may create 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, m
18、oving parts and/or sharp edges for the prevention of electric shock and fire hazard. When service is required, the original lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after reassem- bling. (5) Leakage shock hazard testing After reass
19、embling 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 product is safe to operate without danger of electrical shock.Do not use a line isolation t
20、ransformer during this check. Plug the AC line cord directly into the AC outlet. Using a Leakage Current Tester, measure the leakage current from each exposed metal parts of the cabinet, particular- ly any exposed metal part having a return path to the chassis, to a known good earth ground. Any leak
21、age cur- rent must not exceed 0.5mA AC (r.m.s.). Alternate check method Plug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 per volt or more sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15F AC-type capacitor between an ex- posed
22、 metal part and a known good earth ground. Measure the AC voltage across the resistor 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 measure the AC voltage across the resistor. Now, reverse
23、the plug in the AC outlet and repeat each measurement. Voltage measured any must not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.). 1.2Warning (1) This equipment has been designed and manufactured to meet international safety standards. (2) It is the legal responsibility of the r
24、epairer to ensure that these safety standards are maintained. (3) Repairs must be made in accordance 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. 1.3
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