JVC-UXJ55V-cs-sm 电路图 维修手册.pdf

SERVICE MANUAL COPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LIMITED No.MB057 2003/12 MICRO COMPONENT SYSTEM MB057200312 UX-J55V TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28 SP-UXJ55VCA-UXJ55VSP-UXJ55V COMPACT DIGITAL VIDEO COMPACT DIGITAL AUDIO COMPACT DIGITAL VIDEO STANDBY/ON DISPLAY CLOCK /TIMER SLEEP TREBLE UP BASS CANCELSET TAPEFM/AMAUX REPEAT KARAOKE RANDOM AHB PROSTILL MPX PRGMRETURN 132 465 798 10+10 RM- DIGITAL ECHO NEXT DOWN PREV. /SELECT CD FM MODE REV. MODECD Area Suffix US - Singapore UN - Asean RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB057) SPECIFICATION Design and specifications are subject to change without notice. AmplifierOutput Power120 W (60 W + 60 W) at 6 (10% THD) Audio input sensitivity /Impedance (at 1 kHz) AUX400 mV/48 k Speakers/Impedance6 - 16 TunerFM tuning range87.50 MHz - 108.00 MHz AM tuning rangeAM 10 kHz intervals530 kHz - 1 710 kHz AM 9 kHz intervals531 kHz - 1 710 kHz CD playerDynamic range85 dB Signal-to-noise ratio90 dB Wow and flutterImmeasurable Cassette deck Frequency responseNormal (type I)60 Hz - 14 000 Hz Wow and flutter0.15% (WRMS) Speaker SP-UXJ55V Speaker unitsWoofer12.0 cm cone 1 Midrange4.0 cm cone 1 Tweeter2.0 cm dome 1 Impedance6 Dimensions (approx.)160 mm 285 mm 181.5 mm (W/H/D) Mass (approx.)2.4 kg each GeneralPower requirementAC 110 V/ 127 V/ 220 V/ 230 V - 240 V , adjustable with the voltage selector, 50 Hz/60 Hz Power consumption130 W (at operation) 3.4 W (on standby) Dimensions (approx.)490 mm 286 mm 323.3 mm (W/H/D) Mass (approx.)10.3 kg RadioFans.CN 收音机爱 好者资料库 (No.MB057)1-3 SECTION 1 PRECAUTION 1.1Safety 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, 1,000 per volt or more sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15F AC-type capacitor between an ex- posed 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 mA AC (r.m.s.). 1.2Warning (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. 1.3Caution 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. 1.4Critical 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 ground Place this probe on each exposed metal part. AC VOLTMETER (Having 1000 ohms/volts, or more sensitivity) 1500 10W 0.15 F AC TYPE RadioFans.CN 收音机爱 好者资料库 1-4 (No.MB057) 1.5Preventing 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 CD 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 testers internal power source can easily destroy the laser diode. 1.6Handling 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. 1.7Attention when traverse unit is decomposed *Please refer to Disassembly method in the text for the CD pickup unit. Apply solder to the short land sections before the flexible wire is disconnected from the connector CN601 on the CD servo board. (If the flexible wire is disconnected without applying solder, the CD 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. 1M Conductive material (conductive sheet) or iron palate (caption) Anti-static wrist strap CN601 on mechanism board Shorting round Shorting round Flexible wire (No.MB057)1-5 1.8Important for laser products 1.CLASS 1 LASER PRODUCT 2.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 the Laser Unit. Do not disassemble the Laser Unit. Replace the complete Laser Unit if it malfunctions. 4.CAUTION : The compact disc 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 de feated. 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 herein may result in hazardous radiation exposure. REPRODUCTION AND POSITION OF LABEL and PRINT WARNING LABEL and PRINT ! Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check. Caution label 1-6 (No.MB057) SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. (No.MB057)1-7 SECTION 3 DISASSEMBLY 3.1Main body 3.1.1Removing the metal cover (See Fig.13) (1) Pull out the MIC volume knob on top of the body. (2) Remove the six screws A on the back of the main body. (3) Remove the two screws B on each side and remove the metal cover in the direction of the arrow. Fig.1 Fig.2 Fig.3 Metal cover Volume knob A A A B B 1-8 (No.MB057) 3.1.2Removing the rear cover (See Fig.4) (1) Remove the two screws D attaching the rear cover. Fig.4 D Rear cover (No.MB057)1-9 3.1.3Removing the rear panel / fan assembly (See Fig.5,6) Prior to performing the following procedure, remove the metal cover and the rear cover. (1) Remove the twelve screws E attaching the rear panel. Release the two joints a on the rear side and the two joints b on each side. (2) Remove the two screws F attaching the fan bracket and release the two joints d on the rear panel, and remove. (3) Disconnect the wire from the connector CN908 on the main board. Reference: The MIC volume board comes off. 3.1.4Removing the MIC volume board (See Fig.6) Prior to performing the following procedure, remove the metal cover, the rear cover and the rear panel. (1) Remove the two screws G attaching the MIC volume board on the inside of the rear panel. (2) Disconnect the wire from connector CN906 on the main board on the back of the body. Fig.5 Fig.6 Rear panel Fan assembly EE E E E F E F dd a b b Main board Mic volum board CN908 CN906 Rear panel G 1-10 (No.MB057) 3.1.5Removing the tuner board (See Fig.7) Prior to performing the following procedure, remove the metal cover. (1) Disconnect the card wire from the connector CN1 on the tuner board. (2) Remove the two screws H on the rear side and the screw J in the side. Fig.7 3.1.6Removing the VCD mechanism assembly (See Fig.8) Prior to performing the following procedure, remove the metal cover, the rear cover, the rear panel and the tuner board. (1) Disconnect the card wire from the connector CN903, CN902 and CN904 on the main board. (2) Pull the joint e in the direction of the arrow and remove the VCD mechanism assembly backward while releasing the joint f . Fig.8 Tuner board CN1 H J CN902 CN904 CN903 VCD mechanism assembly Main board e e f (No.MB057)1-11 3.1.7Removing the main board / the heat sink board / the speaker board / the vocal cancel board (See Fig.911) Prior to performing the following procedure, remove the metal cover, the rear cover, the rear panel, and the VCD mechanism assembly. (1) Remove the two screws K attaching the main board. (2) Disconnect the card wire from the connector CN900, CN901,CN930,CN931 and CN932, and disconnect the wire from the connector CN907 and CN916,CN917 on the main board. (3) Remove the band and disconnect the wire from the connector CN951 on the power transformer assembly, and then remove the main board / the heat sink board from the body. (4) Release the two joints g of the main board and disconnect the connector CN944 and CN945 of the heat sink board from the connector CN912 and CN911 of the main board respectively, and remove. (5) Remove the two screws L and the two screws M attaching the heat sink. (6) Remove the screw N attaching the speaker board. (7) Disconnect the vocal cancel board from connector CN905 on the main board. Fig.9 Fig.10 Fig.11 H g Main board Power transformer assembly CN951 CN930 CN916 CN900 CN901 CN917 CN931 CN907 CN932 Band Main board CN905 Vocal cancel board CN944 CN945 CN912 CN911 CN905 Heat sink board Main board Vocal cancel board Speaker board 1-12 (No.MB057) 3.1.8Removing the power transformer assembly (See Fig.12) Prior to performing the following procedure, remove the metal cover, the rear cover, the rear panel, the VCD mechanism assembly and the main board. (1) Disconnect the power cord from the connector J1000 on the power transformer assembly. (2) Remove the four screws P . Fig.12 Power transformer assembly J1000 PP (No.MB057)1-13 3.1.9Removing the front panel assembly (See Fig.13,14) Prior to performing the following procedure, remove the metal cover, the rear cover, the rear panel, and the VCD mechanism assembly. (1) Remove the two screws Q on each side. Release the two joints h on the both sides and lift the front panel assembly to release the joint j. (2) Disconnect the card wire from the connector CN900, CN901, CN930, CN931 and CN932 on the main bo