Jvc XVNA 7 SL Service Manual
This is the 88 pages manual for Jvc XVNA 7 SL Service Manual.
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Extracted text from Jvc XVNA 7 SL Service Manual (Ocr-read)
Page 1
XV-NA7SL 3 SECTION 1 Important Safety Precautions 1.1 Safety Precautions (1) This design of this product contains special hardware and many circuits and components specially for safety purposes. 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 performed 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 using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in the Parts List of Service Manual. Electrical components having such feat u re s a re identified by shading on the schematics and by ( ) on the Parts List in the Service Manual. The use of a sub- stitute replacement which does not have the same safety characteristics 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 reassembling. (5) Leakage shock hazard testing) After reassembling the product, always perform an isolation check on the exposed metal parts of the product (antenna 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, particu- larly any exposed metal part having a return path to the chassis, to a known good earth ground. Any leakage current 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 ohms per volt or more sensitivity in the following manner. Connect a 1,500 ohm 10W resistor paralleled by a 0.15 µF AC-type capacitor between an exposed 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 lo- cal 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. (Except the JC version)
Page 2
XV-NA7SL 4 1.5 Preventing static electricity Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs. 1.5.1 Grounding to prevent damage by static electricity Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as DVD players. Be careful to use proper grounding in the area where repairs are being performed. (1) Ground the workbench Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the traverse unit (optical pickup) on it. (2) Ground yourself Use an anti-static wrist strap to release 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 optical pickup are shorted. After replacement, return the shorted parts to their original condition. (Refer to the text.) - Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power source can easily destroy the laser diode. 1.6 Handling the traverse unit (optical pickup) (1) Do not subject the traverse unit (optical pickup) to strong shocks, as it 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 the replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long a 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.
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XV-NA7SL 2-14 BK811 K415C434 K422 K416C433 K412R469 R470 CN401 R473 R471 R475R477 R483 R487 R489 R491R493 K411 R499 R497 R495 R353 R351 R443 R445 R447 R449 K421R437 R435 R431R433R451 R459 R453R455 C461 C462C421C422 K417 K418 C441 C442C430 C429 R361 C435 R369 R444 R442R434 R432 R438R436 IC812C416 C414 R448R450 R452 IC812C426 C428R454 R466 R456 C418R468 C409 R363 C431 IC811 C415 C413 R367 IC811 C425 C427 C417C424 R458R460 C1426 Q402R464 R462 C423 J401 C1425Q401 R463 R461 C474 C473 R359R360 C470 C1467 R362 C475 R366R370 R484R474 R472 R478R476 IC822C456 C454 R488R490 R492 IC822C466 C468R494 R496 C458R358 C410 R364 C469 IC821 C455C453 R368 IC821 C465 C467 C457 R357C464 R498R350 Q404R354 R352 C463Q403 R485 R486 R446 IC411 R479 R481R373 R375 R355R439 R441 R457R465 R467 K419 K420R377K413 R371 R389R365 R440 C412 C420C432 C411 C419 IC412 R374 R376 R378K414 R372 R390 R482R480 C452 C460 R356C1468 C451 C459 C1466 C1465 NQR0007-002X470/6.3 NQR0007-002X NQR0007-002X470/6.3 NQ70007-002X47 47 QGF1016C1-17 18K 18K 36K1.6K 2.7K 3.6K 750 7501K NQR0007-002X 560 27K 18K 10K 100 2.7K 2.7K 3.6K 750 NQR0007-002X1.6K 36K 18K18K750 560 1K18K 1000P 1000P1000P1000P 0.01 0.011.5 220/6.3 22 1.5 470 2.7K 30K18K 18K 1.6K36k NJM4580L120P 4700P 3.6K750 750NJM4580L100/16 100/161K 220 18K 0.012220 1500P 3.3k 0.01 NJM4580L 120P 4700P 470 NJM4580L 100/16 100/16 0.01247/25 27K560 2200p 2SD2144S/VW/-T10K 100 47/252200p2SD2144S/VW/-T 10K 100 470/6.3 470/6.3 1047 1.5 220/6.3 22 1.5 10470 2.7K18K 18K 1.6K36k NJM4580L120P 4700P 3.6K750 750 NJM4580L100/16 100/161K 18K 0.012220 1500P 3.3k 0.01 NJM4580L 120P4700P 470 NJM4580L 100/16 100/16 0.012 22047/25 27K560 2SD2144S/VW/-T10K 100 47/252SD2144S/VW/-T 2.7K 2.7K2.7K MN35505 30K 30K470 470 22030K 30K 27K220 220 NQR0007-002X NQR0007-002XNQR0007-002X NQR0007-002X470NQR0007-002X 470 1010 30K 1200P 1000P0.22 1200P 1000P MN35505 470 470 470NQR0007-002X 470 10 30K30K 1200P 1000P 2200.22 1200P 1000P 2200p 2200p DAC1CS D.GND AOUT1 AOUT2 DDATA LRCK BCK MUTE2 DCLK DCLK DAC2CS DAC1CS DDATA BCK MUTE2-12VDCLK LRCK AOUT1DDATA LRCK +12V BCKAOUT2 MUTE2 DAC2CS Surround audio section TO CN704 SHEET 5 SHEET 8 Audio signal
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XV-NA7SL 3-4 Item Parts number Parts name Area A Parts list (General assembly) 2/2 Q'ty Description Block No. M1MM 45 LE20647-024AREAR PANEL UW 1 46 QYSBSGY3008MSPECIAL SCREW 1 47 QYSBSGY3008MSPECIAL SCREW 1 48 QYSBSGY3008M SPECIAL SCREW 1 49 QYSBSGY3008MSPECIAL SCREW 1 50 QYSBSGY3008MSPECIAL SCREW 1 51 QYSBSGY3008M SPECIAL SCREW 2 52 QYSBSGY3008MSPECIAL SCREW B,E,EN 2 53 QYSBSGY3008MSPECIAL SCREW 1 54 QYSBSGY3008MSPECIAL SCREW 1 55 QYSBSGY3008MSPECIAL SCREW 1 56 QYSBSGY3008MSPECIAL SCREW 1 57 QMF51E2-1R6-J1FUSE 1 58 QHS3771-108 CORD STOPPER 1 59 QMPG070-244-JCPOWER CORD A 1 QMPN160-200-JDPOWER CORD B 1 QMPK190-200-JCPOWER CORD E,EN,US,UW 1 60 QZW0004-001WIRE CLAMP 2 61 LE20645-001AMETAL COVER 1 62 QYSBSGG3008ET.SCREW 3 63 QYSDSG3008N T.SCREW 2 64 LE31040-001AORNAMENT 1 65 LE20663-001AFITTING BASE 1 66 LV41843-001ALASER CAUTION 1 67 LE31028-001ALCD LENS 1 A A A A 68QYSBSE3008Z SCREW1 A