JVC-THM501-ddts-sm维修电路原理图.pdf
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1、SERVICE MANUAL COPYRIGHT 2004 VICTOR COMPANY OF JAPAN, LIMITED No.MB192 2004/5 DVD DIGITAL THEATER SYSTEM MB19220045 TH-M505, TH-M501 TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2、 . . . . 1-3 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3、. . . . . 1-7 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4、. . . . . . . . . . 1-34 Area suffix J - U.S.A. Area suffix J - U.S.A. C - Canada TH-M501 TH-M505 (SP-THM505C, SP-THM303C) (SP-THM505F, SP-THM303F) (SP-THM505S, SP-THM303S) (SP-PWM505, SP-PWM501) (XV-THM505, XV-THM501) RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB192) SPECIFICATION Center unit (XV-THM606/XV-TH
5、M603/XV-THM505/XV-THM501/ XV-THM303/XV-THM301) *1: Corresponding to Linear PCM, Dolby Digital, and DTS Digital Surround (with sampling frequency - 32 kHz, 44.1 kHz, 48 kHz) Subwoofer (SP-PWM603/SP-PWM505/SP-PWM501) *2: For SP-PWM501 Front speakers (SP-THM505F) Surround speakers (SP-THM505S) Center S
6、peaker (SP-THM505C) Designs & specifications are subject to change without notice. Audio sectionTotal Harmonic Distortion0.02% NOTE:This value is measured at System cord CONNECTOR for reference. Digital input *1DIGITAL IN (DBS) (OPTICAL) : -21 dBm to -15 dBm (660 nm E30 nm) Video sectionVideo System
7、NTSC Horizontal Resolution500 lines Signal-to-Noise Ratio64 dB Video 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 sensitivity/Impedance (VCR IN) Composite:1.0 V(p-p)/75 S-video-Y:1.0 V(p-p)/7
8、5 S-video-C:0.286 V(p-p)/75 Tuner sectionTuning RangeFM:87.5 MHz to 108.0 MHz AM:530 kHz to 1 710 kHz Power RequirementsAC 120 V, 60 Hz GeneralPower Consumption18 W (at operation) 2.0 W (in standby mode) Dimensions (W H D)400 mm 85 mm 380 mm (15-3/4 inches 3-3/8 inches 15 inches) Amplifier section F
9、ront/Center/Surround140 W (80 W *2) per channel, RMS at 4 (Center/Surround)/ 140 W (120 W *2) per channel, RMS at 4 (Front) at 1 kHz, with 10 % total harmonic distortion. Subwoofer300 W , RMS at 4 at 100 Hz, with 10 % total harmonic distortion. Speaker section Speaker unit25 cm (9-7/8 inches) Bass-r
10、eflex, Magnetically Shielded Frequency Range20 Hz to 200 Hz GeneralPower RequirementsAC 120 V, 60 Hz Power Consumption155 W (at operation) 0 W (in standby mode) Dimensions (W H D)256 mm 482 mm 460 mm (10-1/8 inches x 19 inches x 18-1/8 inches) Mass18.5 kg (41 lbs) SpeakersWoofer8.0 cm (3-3/16 inches
11、) Tweeter1.5 cm (5/8 inches) Bass-reflex, Magnetically Shielded Power Handling Capacity140 W Impedance4 Frequency Range90 Hz to 20 kHz Dimensions (W H D)104.5 mm 139 mm 101 mm (4-1/8 inches 5-1/2 inches 4 inches) Mass0.7 kg (1.6 lbs) Speakers8.0 cm (3-3/16 inches) Bass-reflex, Magnetically Shielded
12、Power Handling Capacity140 W Impedance4 Frequency Range80 Hz to 20 kHz Dimensions (W H D)111.5 mm 139 mm 106.5 mm (4-7/16 inches 5-1/2 inches 4-1/4 inches) Mass0.52 kg (1.2 lbs) SpeakersWoofer8.0 cm (3-3/16 inches) Tweeter1.5 cm (5/8 inches) Bass-reflex, Magnetically Shielded Power Handling Capacity
13、140 W Impedance4 Frequency Range90 Hz to 20 kHz Dimensions (W H D)137 mm 105 mm 104.5 mm (5-7/16 inches 4-3/16 inches 4-1/8 inches) Mass0.7 kg (1.6 lbs) RadioFans.CN 收音机爱 好者资料库 (No.MB192)1-3 SECTION 1 PRECAUTION 1.1Safety Precautions (1) This design of this product contains special hardware and many
14、 circuits and components specially for safety purpos- es. For continued protection, no changes 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 qualifi
15、ed 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 additions will void the manufacturers warranty and will further relieve the manufacture of responsibility for personal
16、injury or property damage resulting therefrom. (3) Many electrical and mechanical parts in 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 replace
17、ment components rated for higher voltage, watt- age, etc. Replacement parts which have these 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
18、 Service Manual. The use of a substitute replacement which does not have the same safety 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,
19、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 required, the original lead routing and dress should be observed, and it should be confirmed that they have be
20、en returned to normal, after reassem- bling. (5) Leakage shock hazard testing After 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 pr
21、oduct 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. Using a Leakage Current Tester, measure the leakage current from each exposed metal parts of the cabinet, particular- ly any expos
22、ed metal part having a return path to the chassis, to a known good earth ground. Any leakage 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.
23、Connect a 1,500 10W resistor paralleled by a 0.15F AC-type capacitor between an exposed 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 re
24、turn path to the chassis, and measure the AC voltage across the resistor. Now, reverse 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 manufactu
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