JVC-DD3B-nms-sm维修电路原理图.pdf

SERVICE MANUAL COPYRIGHT 2006 Victor Company of Japan, Limited No.MB563 2006/11 NETWORK MEDIA SYSTEM MB563200611 DD-8B,DD-8E,DD-8EN,DD-8EV, DD-8EE,DD-3B,DD-3E,DD-3EN, DD-3EV,DD-3EE Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade) TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-35 (Only for DD-8 and DD-3) CA-DD8SP-DD8FSP-DD8FSP-PWDD8 SP-DD8S CA-DD3SP-DD3FSP-DD3F SP-PWDD3 SP-DD8S RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB563) SPECIFICATION Main unit (CA-DD8/CA-DD3) Subwoofer for DD-8 (SP-PWDD8) TunerFM frequency : 87.50 MHz - 108.00 MHz AM frequency : 522 kHz - 1 629 kHz Terminal (front of the main unit)Audio output headphone terminal 1 Impedance : 16 to 1 k USB digital input terminal 1 Analog input terminal 1 Stereo mini jack Analog output terminal 1 Stereo mini jack Terminal (rear of the main unit)Optical digital input terminal 1 -23 dBm to -15 dBm Optical digital output terminal 1 -23 dBm to -15 dBm System terminal 1 Component video output terminals (3) 1 Y : 1.0 Vp-p, sync negative, 75 terminated PB : 0.7 Vp-p, 75 terminated PR : 0.7 Vp-p, 75 terminated Audio input terminals (2) 1 500 mV/47 k SCART terminal 1 AM antenna terminal 1 FM antenna terminal 1 Ethernet terminal HDMI monitor output terminal USBCompatible with USB 2.0 Full-Speed Compatible device : Mass storage class device Compatible file system : FAT16, FAT32 Bus power supply : Max. 500 mA GeneralPower source : AC 230 V , 50 Hz Power consumption (in operation) : 25 W Power consumption (on standby) : 0.5 W Dimensions (W H D) : 445 mm 55 mm 286.4 mm (including projecting parts) Weight : 3.5 kg (CA-DD8), 3.0 kg (CA-DD3) TypeBass reflex type, Magnetically shielded type AmplifierSubwoofer : 120 W at 4 (110 Hz, THD 10%) Left/right speaker : 25 W 2 at 3 (1 kHz, THD 10%) Center surround speaker : 25 W 2 at 3 (1 kHz, THD 10%) Speaker16 cm cone Power handling capacity : 120 W Impedance : 4 Frequency range : 30 Hz - 230 Hz Sound pressure level : 72 dB/Wm GeneralPower source : AC 230 V , 50 Hz Power consumption : 120 W Dimensions (W H D) : 242 mm 364 mm 363 mm Weight : 12.6 kg RadioFans.CN 收音机爱 好者资料库 (No.MB563)1-3 Subwoofer for DD-3 (SP-PWDD3) Left and right speakers forDD-8 (SP-DD8F) Left and right speakers forDD-3 (SP-DD3F) Center surround speaker for DD-8/DD-3 (SP-DD8S) Designs and specifications are subject to change without notice. TypeBass reflex type AmplifierSubwoofer : 120 W at 4 (110 Hz, THD 10%) Left/right speaker : 25 W 2 at 3 (1 kHz, THD 10%) Center surround speaker : 25 W 2 at 3 (1 kHz, THD 10%) Speaker16 cm cone Power handling capacity : 120 W Impedance : 4 Frequency range : 30 Hz - 230 Hz Sound pressure level : 72 dB/Wm GeneralPower source : AC 230 V , 50 Hz Power consumption : 120 W Dimensions (W H D) : 242 mm 364 mm 363 mm Weight : 12.3 kg Type2-way 3-speaker bass reflex type, Magnetically shielded type Speaker8 cm cone 2 + 2 cm dome Power handling capacity30 W Impedance3 Frequency range60 Hz - 40 kHz Sound pressure level81 dB/Wm Dimensions (W H D)289 mm 1 101 mm 289 mm Weight (1 unit)10.0 kg Type2-way acoustic suspension type, Magnetically shielded type Speaker9.5 cm 1 cm direct drive + 2 cm dome Power handling capacity30 W Impedance3 Frequency range100 Hz - 40 kHz Sound pressure level78 dB/Wm Dimensions (W H D)165 mm 376 mm 165 mm (including stand) Weight (1 unit)1.0 kg (including stand) Type1-way acoustic suspension type, Magnetically shielded type Speaker9.5 cm 1 cm direct-drive Power handling capacity30 W Impedance3 Frequency range120 Hz - 40 kHz Sound pressure level79 dB/Wm Dimensions (W H D)344 mm 61 mm 76 mm (including stand) Weight0.95 kg (including stand) 1-4 (No.MB563) 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 (No.MB563)1-5 1.5 Safety Precautions (U.K only) (1) This design of this product contains special hardware and many circuits and components specially for safety purposes. For con- tinued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replace- ment parts must be identical to those used in the original circuits. (2) Any unauthorised design alterations or additions will void the manufacturers guarantee; furthermore the manufacturer cannot accept responsibility for personal injury or property damage resulting therefrom. (3) Essential safety critical components are identified by ( ) on the Parts List and by shading on the schematics, and must never be replaced by parts other than those listed in the manual. Please note however that many electrical and mechanical parts in the product have special safety related characteristics. These characteristics are often not evident from visual inspection. Parts other than specified by the manufacturer may not have the same safety characteristics as the recommended replacement parts shown in the Parts List of the Service Manual and 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 re-assembling. 1.5.1Warning (1) Service should be performed by qualified personnel only. (2) This equipment has been designed and manufactured to meet international safety standards. (3) It is the legal responsibility of the repairer to ensure that these safety standards are maintained. (4) Repairs must be made in accordance with the relevant safety standards. (5) It is essential that safety critical components are replaced by approved parts. (6) If mains voltage selector is provided, check setting for local voltage. 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. 1-6 (No.MB563) 1.6Preventing 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. 1.6.1 Grounding to prevent damage by static electricity Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as laser products. 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. 1.7Handling 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. 1.8Attention 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 card wire is disconnected from the connecto on the servo board. (If the card wire 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 card wire. 1M Conductive material (conductive sheet) or iron palate (caption) Anti-static wrist strap Solder short land section (No.MB563)1-7 1.9Important for laser products 1.CLASS 1 LASER PRODUCT 2.CAUTION : Visible and/or invisible class 1M laser radiation when open. Do not view directly with optical instruments. 3.CAUTION : Visible and/or invisible laser radiation when open and inter lock failed or defeated. Avoid direct exposure to beam. 4.CAUTION : This laser product uses visible and/or 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 LABELS and PRINT ! Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check. WARNING LABEL and PRINT 1-8 (No.MB563) SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. (No.MB563)1-9 SECTION 3 DISASSEMBLY 3.1Main body section 3.1.1