Jvc EXD 1 Service Manual
This is the 36 pages manual for Jvc EXD 1 Service Manual.
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Extracted text from Jvc EXD 1 Service Manual (Ocr-read)
Page 1
1-2 (No.MB399) SPECIFICATION Designs and Specifications are subject to change without notice. General Power source AC 230 V , 50 Hz Power consumption 25 W (in operation) 1.0 W (on standby) Weight 3.0 kg External dimensions (W × H × D) 150 mm × 152 mm × 246 mm DVD player Playable discs DVD VIDEO, DVD AUDIO, VCD, SVCD, CD, CD-R/RW (CD, VCD, MP3, WMA, JPEG format), DVD-R/-RW (video format) Video output Color system PAL Horizontal resolution 500 lines Composite × 1 1.0 V (p-p)/75 Ω, synchronization negative S-video × 1 Y output: 1.0 V (p-p)/75 Ω, synchronization negative C output: 0.3 V (p-p)/75 Ω Component × 1 Y output: 1.0 V (p-p)/75 Ω, synchronization negative PB/PR output: 0.7 V (p-p)/75 Ω Audio output Analog sound output Speakers × 2 Output power (IEC 268-3): 36 W (18 W+18 W) at 4 Ω (10% THD) Fitting impedance: 4 Ω to 16 Ω Headphones × 1 11 mW/32 Ω Fitting impedance: 16 Ω to 1 kΩ Subwoofer × 1 500 mVrms/10 kΩ Digital sound output Optical × 1 -21 dBm to -15 dBm Audio input Sound input AUX × 1 400 mV/50 kΩ USB AUDIO × 1 Tuner FM tuner Receiving frequency 87.50 MHz to 108.00 MHz Antenna 75 Ω- Unbalanced type AM (MW) tuner Receiving frequency 522 kHz to 1 629 kHz Antenna External antenna jack (loop antenna) Speaker Type Full range 1-way bass-reflex type Magnetically shielded type Speaker 8cm cone × 1 Frequency response 55 to 20 000 Hz Power handling capacity 30 W Impedance 4Ω Sound pressure level 80 dB/W m Dimension (W × H × D) 120 mm × 151 mm × 241 mm Weight 1.8 kg each
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(No.MB399)1-3 SECTION 1 PRECAUTION 1.1 Safety Precautions (1) This design of this product contains special hardware and many 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 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 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 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 replacement 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 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, 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 been 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 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. 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 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, 1,000Ω per volt or more sensitivity in the following manner. Connect a 1,500Ω 10W resistor paralleled by a 0.15µF 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 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 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.). 1.2 Warning (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 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 Caution Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of pre- forming repair of this system. 1.4 Critical parts for safety In regard with component parts appearing on the silk-screen printed side (parts side) of 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. When replacing them, be sure to use the parts of the same type and rating as specified by the manufacturer. (This regulation dose not Except the J and C version) Good earth groundPlace this probe on each exposed metal part. AC VOLTMETER (Having 1000 ohms/volts, or more sensitivity) 1500 10W 0.15 F AC TYPE
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1-14 (No.MB399) 3.1.7 Removing the digital amplifier board assembly (See Figs.15 and 16) - Remove the side panels L/R, top panel assembly, rear panel and switching power supply. (1) From the top side of the main body, remove the screw Q attaching the digital amplifier board assembly. (See Fig.15.) (2) From the left side of the main body, disconnect the connec- tors (CN310 , CN311 , CN312 ) on the digital amplifier board assembly from the regulator board. (See Fig.16.) (3) Release the joint g of the shield case B in the direction of the arrow and take out the digital amplifier board assembly from the main body. (See Fig.16.) Fig.15 Fig.16 Digital amplifier board assembly Q Digital amplifier board assembly Shield case B CN312 CN311 CN310 Regulator board g