Jvc-UXGD-6-Service-Manual电路原理图.pdf

SERVICE MANUALCOPYRIGHT © 2005 Victor Company of Japan, LimitedNo.MB4082005/6MICRO COMPONENT SYSTEMMB40820056UX-GD6S,UX-GD6MLead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)TABLE OF CONTENTS1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-63 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-74 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-315 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-35SUPER VIDEOCA-UXGD6S CA-UXGD6MSP-UXGD6S SP-UXGD6S SP-UXGD6M SP-UXGD6MArea suffixA - AustraliaUS - SingaporeUT - TaiwanUW - Brazil,Mexico,PeruUX - Saudi ArabiaUG - Turkey,South Africa,EgyptUN - AseanUX-GD6SArea suffixUX-GD6MUB - Hong KongUF - ChinaUP - KoreaUT - TaiwanUG - Turkey,South Africa,Egypt1-2 (No.MB408)SPECIFICATIONCA-UXGD6S (for UX-GD6S)/CA-UXGD6M (for UX-GD6M)Speakers-SP-UXGD6S (for UX-GD6S)Speakers-SP-UXGD6M (for UX-GD6M)Designs & specifications are subject to change without notice.Amplifier section Output Power 100 W (50 W + 50 W) at 6 (10% THD)Audio Input AUX 400 mV/50 k (at “AUX LVL1“)200 mV/50 k (at “AUX LVL2“)Digital output DVD OPTICAL DIGITAL OUT: -21 dBm to -15 dBm (660 nm ±30 nm)Video output Color system: NTSC or PAL (interlaced/progressive)VIDEO (composite) 1 V(p-p)/75S-VIDEO Y (luminance): 1 V(p-p)/75C (chrominance, burst): NTSC: 0.286 V(p-p)/75, PAL: 0.3 V(p-p)/75COMPONENT (Y): 1 V(p-p)/75(PB/PR): 0.7 V(p-p)/75Speaker impedance 6 - 16Tuner section FM tuning range 87.50 MHz - 108.00 MHzAM (MW) tuning range 531 kHz - 1 710 kHz (at 9 kHz intervals)530 kHz - 1 710 kHz (at 10 kHz intervals)For Saudi Arabia only531 kHz - 1 602 kHz (at 9 kHz intervals)530 kHz - 1 600 kHz (at 10 kHz intervals)Tape section Frequency response 60 Hz - 14 000 HzWow and flutter 0.15 % (WRMS)Disc player section Region codes Middle East: 2South East Asia: 3Central and South America: 4Playable disc DVD Video/DVD AudioCD/VCD/SVCDCD-R/CD-RW (CD/SVCD/VCD/MP3/JPEG format)DVD-R (DVD Video format)DVD-RW/DVD-ROM/DVD-RAM (DVD-VR format)Dynamic range 80 dBHorizontal resolution 500 linesWow and flutter ImmeasurableGeneral Power requirement AC 110 V/AC 127V/AC 220 V - AC 230 V(adjustable with the voltage selector), 50 Hz/60 HzPower consumption 95 W (at operation)4 W (on standby)Dimensions (approx.) 170 mm × 240 mm × 361 mm (W/H/D)Mass (approx.) 5.6 kgSpeaker units Tweeter 4 cm cone × 1Woofer 13.5 cm cone × 1Impedance 6Dimensions (approx.) 165 mm × 283.5 mm × 249 mm (W/H/D)Mass (approx.) 2.8 kg eachSpeaker units Tweeter 4 cm cone × 1Woofer 12 cm cone × 1Impedance 6Dimensions (approx.) 145 mm × 240 mm × 201 mm (W/H/D)Mass (approx.) 2.2 kg each(No.MB408)1-3SECTION 1PRECAUTION1.1 Safety Precautions(1) This design of this product contains special hardware andmany circuits and components specially for safety purpos-es. For continued protection, no changes should be madeto the original design unless authorized in writing by themanufacturer. Replacement parts must be identical tothose used in the original circuits. Services should be per-formed by qualified personnel only.(2) Alterations of the design or circuitry of the product shouldnot be made. Any design alterations of the product shouldnot be made. Any design alterations or additions will voidthe manufacturers warranty and will further relieve themanufacture of responsibility for personal injury or propertydamage resulting therefrom.(3) Many electrical and mechanical parts in the products havespecial safety-related characteristics. These characteris-tics are often not evident from visual inspection nor can theprotection afforded by them necessarily be obtained by us-ing replacement components rated for higher voltage, watt-age, etc. Replacement parts which have these specialsafety characteristics are identified in the Parts List of Ser-vice Manual. Electrical components having such featuresare identified by shading on the schematics and by ( ) onthe Parts List in the Service Manual. The use of a substitutereplacement which does not have the same safety charac-teristics as the recommended replacement parts shown inthe Parts List of Service Manual may create shock, fire, orother hazards.(4) The leads in the products are routed and dressed with ties,clamps, tubings, barriers and the like to be separated fromlive parts, high temperature parts, moving parts and/orsharp edges for the prevention of electric shock and firehazard. When service is required, the original lead routingand dress should be observed, and it should be confirmedthat they have been returned to normal, after reassem-bling.(5) Leakage shock hazard testingAfter 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 productis safe to operate without danger of electrical shock.Do notuse 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 currentfrom each exposed metal parts of the cabinet, particular-ly any exposed metal part having a return path to thechassis, to a known good earth ground. Any leakage cur-rent must not exceed 0.5mA AC (r.m.s.). Alternate check methodPlug the AC line cord directly into the AC outlet. Use anAC voltmeter having, 1,000 per volt or more sensitivityin the following manner. Connect a 1,500 10W resistorparalleled 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 metalpart, particularly any exposed metal part having a returnpath to the chassis, and measure the AC voltage acrossthe resistor. Now, reverse the plug in the AC outlet andrepeat each measurement. Voltage measured any mustnot exceed 0.75 V AC (r.m.s.). This corresponds to 0.5mA AC (r.m.s.). 1.2 Warning(1) This equipment has been designed and manufactured tomeet international safety standards.(2) It is the legal responsibility of the repairer to ensure thatthese safety standards are maintained.(3) Repairs must be made in accordance with the relevantsafety standards.(4) It is essential that safety critical components are replacedby approved parts.(5) If mains voltage selector is provided, check setting for localvoltage.1.3 CautionBurrs formed during molding may be left over on some partsof the chassis. Therefore, pay attention to such burrs in the case of pre-forming repair of this system.1.4 Critical parts for safetyIn regard with component parts appearing on the silk-screenprinted side (parts side) of the PWB diagrams, the parts that areprinted over with black such as the resistor ( ), diode ( )and ICP ( ) or identified by the “ “ mark nearby are criticalfor safety. When replacing them, be sure to use the parts of thesame 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 exposedmetal part.AC VOLTMETER(Having 1000 ohms/volts,or more sensitivity)1500 10W0.15 F AC TYPE1-4 (No.MB408)1.5 Preventing static electricityElectrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laserdiode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.1.5.1 Grounding to prevent damage by static electricityStatic electricity in the work area can destroy the optical pickup (laser diode) in devices such as laser products. Be careful to use proper grounding in the area where repairs are being performed. (1) Ground the workbenchGround the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing thetraverse unit (optical pickup) on it.(2) Ground yourselfUse 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 opticalpickup 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 easilydestroy 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 thereplacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long atime 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.1.7 Attention when traverse unit is decomposed*Please refer to “Disassembly method“ in the text for the pickup unit. Apply solder to the short land sections before the flexible wire is disconnected from the connecto on the servo board. (If the flexiblewire is disconnected without applying solder, the pickup may be destroyed by static electricity.) In the assembly, be sure to remove solder from the short land sections after connecting the flexible wire.1MConductive material(conductive sheet) or iron palate(caption)Anti-static wrist strapShort land sectionConnectorTraverse mechanism assemblyDVD pickupCard wire(No.MB408)1-51.8 Important for laser products1.CLASS 1 LASER PRODUCT2.DANGER : Invisible laser radiation when open and inter lock failed or defeated. Avoid direct exposure to beam.3.CAUTION : There are no serviceable parts inside theLaser Unit. Do not disassemble the Laser Unit. Replace the complete Laser Unit if it malfunctions.4.CAUTION : The CD,MD and DVD player uses invisible laser radiation and is equipped with safety switches which prevent emission of radiation when the drawer is open and the safety interlocks have failed or are defeated. It is dangerous to defeat the safety switches.5.CAUTION : If safety switches malfunction, the laser is able to function.6.CAUTION : Use of controls, adjustments or performance of procedures other than those specified here in may result in hazardous radiation exposure.REPRODUCTION AND POSITION OF LABELSCAUTION : Visible and Invisible laser radiation when open and interlock failed or defeated.AVOID DIRECT EXPOSURE TO BEAM. (e)VARNING : Synlig ochosynling laserstrålning när den öppnas och spärren ärurkopplad. Betrakta ejstrålen. (s)VARO : Avattaessa ja suojalukitusohitettuna tai viallisena olet alttiina näkyvälle ja näkymättömällelasersäteilylle. Vältä säteenkohdistumista suoraan itseesi. (f)ADVARSEL : Synlig og usynliglaserstråling når maskinen eråben eller interlocken fejeler.Undgå direkte eksponering til stråling. (d)!Please use enough caution not to see the beam directly or touch it in case of an adjustment or operationcheck.CLASS 1LASER PRODUCTCAUTION : Visible and Invisible laser radiation when open and interlock failed or defeated.AVOID DIRECT EXPOSURE TO BEAM. (e)VARNING : Synlig ochosynling laserstrålning när den öppnas och spärren ärurkopplad. Betrakta ejstrålen. (s)VARO : Avattaessa ja suojalukitusohitettuna tai viallisena olet alttiina näkyvälle ja näkymättömällelasersäteilylle. Vältä säteenkohdistumista suoraan itseesi. (f)ADVARSEL : Synlig og usynliglaserstråling når maskinen eråben eller interlocken fejeler.Undgå direkte eksponering til stråling. (d)WARNING LABEL1-6 (No.MB408)SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.(No.MB408)1-7SECTION 3DISASSEMBLY3.1 Main body section3.1.1 Removing the metal cover (See Figs.1 to 3)(1) From the back side of the main body, remove the sixscrews A attaching the metal cover. (See Fig.1.)(2) From the both sides of the main body, remove the twoscrews B attaching the metal cover. (See Figs.2 and 3.)(3) From the top sides of the main body, remove the twoscrews B attaching the metal cover. (See Figs.2 and 3.)(4) Remove the metal cover in the direction of the arrow whileextending the lower sections of the metal cover. (SeeFigs.2 and 3.)Reference:Remove the microphone volume knob from the top side of themetal cover at the same time.Fig.1Fig.2Fig.3Metal coverA AAAMetal coverBBMetal coverBBMicrophone volume knob1-8 (No.MB408)3.1.2 Removing the front panel assembly (See Figs.4 to 6) Remove the metal cover.(1) From the bottom side of the main body, remove the twoscrews C attaching the front panel assembly. (See Fig.4.)(2) From the right side of the main body, push the slide camand pull the tray assembly out of the main body in the di-rection of the arrow 1. (See Fig.5.)(3) Remove the tray fitting from the tray assembly in the direc-tion of the arrow 2 and push the tray assembly in the mainbody. (See Fig.5.)(4) Release the claws a and claws b and remove the front pan-el assembly toward the front. (See Figs.4 to 6.)(5) Disconnect the card wire from the connector CN730 on themicom board. (See Fig.6.)Fig.4Fig.5Fig.6Front panel assemblyCCaa12Front panel assemblyTray assemblyTray fittingSlide cambMicom boardCN730b(No.MB408)1-93.1.3 Removing the rear cover (See Fig.7) Remove the metal cover.(1) From the back side of the main body, remove the screw Dattaching the rear cover.(2) Release the joint sections c and remove the rear cover.Fig.7DcRear coverc1-10 (No.MB408)3.1.4 Removing the cassette chassis assembly (See Figs.8 to 10) Remove the metal cover and rear cover.(1) Remove the two screws E attaching the cassette chassisassembly. (See Fig.8.)(2) From the both sides of the main body, release the joints dand lift the cassette chassis assembly in the direction of thearrow. (See Figs.9 and 10.)(3) From the right side of the main body, disconnect the card