Jvc XV 9000 Service Manual
This is the 58 pages manual for Jvc XV 9000 Service Manual.
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Extracted text from Jvc XV 9000 Service Manual (Ocr-read)
Page 1
XV-D9000 1-2 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 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 characteristics 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 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 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 current check (Electrical 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 , particularly 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 10W resistor paralleled by a 0.15 F 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 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 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. 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 ! Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of this system.
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XV-D9000 1-3 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. 1.1. 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. 1.1.1. Ground the workbench 1. 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. 1.1.2. Ground yourself 1. Use an anti-static wrist strap to release any static electricity built up in your body. 1.1.3. Handling the optical pickup 1. 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.) 2. 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. 1.2. 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. It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it Conductive material (conductive sheet) or iron plate (caption) Anti-static wrist strap
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XV-D9000 1-44 58 59 60~63 64 65~68 69 70~73 74 75~78 79 80~83 84 85~88 89 90~93 94 95~98 99 100~103 104 105 106 107 108~110 111 112 113 114 115 116 117 118~121 122 123~126 127 128 129 130 131 132 133,134 135~138 139 140~143 144 145~148 149PPLLPDN VDD VOUT0~3 VSS VOUT4~7 VDD VOUT8~11 VSS VOUT12~15 VDD VOUT16~19 VSS VOUT20~23 VDD VOUT24~27 VSS VOUT28~31 VDD VOUT32~35 VSS XPLLRST PLLTST VDD SDIV2~0 SVCORNG AVSS SLF AVCC SDCKREF SDPLLPDN VSS SDD00~03 VDD SDD04~07 VSS SDWE SDCAS SDRAS VDD VDDP SDA11,10 SDA0~3 VSS SDD015~012 VDD SDD011~08 VSS Pin No.Symbol I/OFunction Pin Function (2/3) SVP-PE PLL,power down Power supply terminal Video data signal output Connect to ground Video data signal output Power supply terminal Video data signal output Connect to ground Video data signal output Power supply terminal Video data signal output Connect to ground Video data signal output Power supply terminal Video data signal output Connect to ground Video data signal output Power supply terminal Video data signal output Connect to ground PLL Reset signal input L : active Factory test signal Power supply terminal SDRAM PLL multiplying factor VCO Range selection for SDRAM PLL Connect to ground Analog VCO control voltage input and charge pump output Power supply terminal Reference clock for SDRAM PLL SDRAM PLL, power down Connect to ground SDRAM Data input/output Power supply terminal SDRAM Data input/output Connect to ground SDRAM Write enable SDRAM Column address strobe SDRAM row address strobe Power supply terminal Power supply for RF0/RF1 & DIR/DOR write circuit SDRAM Address data output SDRAM Address data output Connect to ground SDRAM Data input/output Power supply terminal SDRAM Data input/output Connect to ground I - O - O - O - O - O - O - O - O - O - I I - I I - I/O - I I - I/O - I/O - O O O - - O O - I/O - I/O - MN8271AT
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XV-D9000 1-47 A L L H HY L L L H B L H L H 1 2 3 4 5 6 714 13 12 11 10 9 8VCC 4B 4A 4Y 3B 3A 3Y (TOP VIEW) 1A 1B 1Y 2A 2B 2Y GND TC74HC08AP(IC915) / TC74HCT08AP(IC916):2-input and gate TC74VHC08FT-X(IC722) / TC74VHCT08AFT-X(IC721):2-input and gate 1.Pin layout 2.Truth table 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 1G B 1C3 1C2 1C1 1C0 1Y GNDVcc 2G A 2C3 2C2 2C1 2C0 2Y SELECT INPUTS X:Don't Care B X L L L L H H H HA X L L H H L L H HC0 X L H X X X X X XC2 X X X X X L H X X G H L L L L L L L LY L L H L H L H L H C3 X X X X X X X L H C1 X X X L H X X X X DATA INPUTSOUTPUT STORE (TOP VIEW) TC74ACT153F-X(IC183):Dual 4-channel multiplexer 1.Pin layout 2.Truth table