JVC-EXD5-cs-sm维修电路原理图.pdf

SERVICE MANUAL COPYRIGHT 2005 Victor Company of Japan, Limited No.MB433 2005/7 COMPACT COMPONENT SYSTEM MB43320057 EX-D5 Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade) TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-35 CA-EXD5SP-EXD1SP-EXD1 Area suffix J - U.S.A. C - Canada RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB433) SPECIFICATION Designs and specifications are subject to change without notice. GeneralPower sourceAC 120 V , 60 Hz Power consumption25 W (in operation) 1.0 W (on standby) Weight3.0 kg (6.7 lbs) External dimensions (W H D)150 mm 152 mm 246 mm (5-15/16 in. 6 in. 9-11/16 in.) DVD playerPlayable discsDVD VIDEO, DVD AUDIO, VCD,SVCD, CD, CD-R/RW (CD, VCD,MP3, WMA, JPEG format),DVD-R/-RW (video format) Video output Color systemNTSC Horizontal resolution500 lines Composite 11.0 V (p-p)/75 , synchronization negative S-video 1Y output: 1.0 V (p-p)/75 , synchronization negative C output: 0.286 V (p-p)/75 Component 1Y output: 1.0 V (p-p)/75 PB/PR output: 0.7 V (p-p)/75 Audio output Analog sound output Speakers 2Output power: 18 W per channel, min. RMS, at 4 at 1 kHz with no more than 10% total harmonic distortion. Fitting impedance: 4 to 16 Headphones 111 mW/32 Fitting impedance: 16 to 1 k Subwoofer 1500 mVrms/10 k Digital sound outputOptical 1-21 dBm to -15 dBm Audio inputSound inputAUX 1400 mV/50 k USB Wireless TransmissionThe USB wireless transmitter supplied with this System supports Direct Se- quence Spreading Spectrum (DSSS) using 2.4 GHz frequency band. TunerFM tunerReceiving frequency 87.5 MHz to 108.0 MHz Antenna75 - Unbalanced type AM tunerReceiving frequency 530 kHz to 1 710 kHz AntennaExternal antenna jack (loop antenna) SpeakerTypeFull range 1-way bass-reflex type Magnetically shielded type Speaker8cm (3 3/16 inches) cone 1 Frequency response55 to 20 000 Hz Power handling capacity30 W Impedance4 Sound pressure level80 dB/W m Dimension (W H D)120 mm 151 mm 241 mm (4-3/4 in. 6 in. 9-1/2 in.) Weight1.8 kg (4.0 lbs) each RadioFans.CN 收音机爱 好者资料库 (No.MB433)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 1-4 (No.MB433) 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 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. 1.6Handling 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 pickup unit. Apply solder to the short land sections before the flexible wire is disconnected from the connecto on the servo board. (If the flexible 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 flexible wire. 1M Conductive material (conductive sheet) or iron palate (caption) Anti-static wrist strap Traverse mechanism assembly Pickup Short land section Card wire Connector (No.MB433)1-5 SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. 1-6 (No.MB433) SECTION 3 DISASSEMBLY 3.1Main body section 3.1.1Removing the side panel L and side panel R (See Figs.1 to 4) (1) From the back side of the main body, remove the four screws A attaching the side panels L/R. (See Fig.1.) (2) From the bottom side of the main body, remove the four screws B attaching the side panels L/R. (See Fig.2.) (3) From the both sides of the main body, release the joint a in the direction of the arrow and remove the side panels L/R toward this side. (See Figs.3 and 4.) Fig.1 Fig.2 Fig.3 Fig.4 AA Side panel RSide panel L B B Side panel R Side panel L Side panel R a a Side panel L a a (No.MB433)1-7 3.1.2Removing the top panel assembly (See Figs.5 to 6) Remove the side panels L/R. (1) From the front side of the main body, pull out the volume knob assembly in the direction of the arrow. (See Fig.5.) (2) Remove the two screws C and remove the volume orna- ment. (See Fig.5.) (3) From the both sides of the main body, remove the two screws D, two screws E and screw F. (See Figs.5 and 6) Reference: When attaching the screw F, attach the earth wire with it. (See Fig.6.) (4) From the back side of the main body, remove the screw G attaching the top panel assembly. (See Fig.6.) (5) From the both sides of the main body, release the joints b and remove the joints c in the direction of the arrow. (See Figs.5 and 6.) (6) Disconnect the card wire from the connector CN427 on the micom board while lifting the top panel assembly. (See Fig.5.) Fig.5 Fig.6 Top panel assembly CN427 c Micom board Volume ornament C C DE b Volume knob assembly Top panel assembly c DE b Top panel assembly G F Earth wire 1-8 (No.MB433) 3.1.3Removing the front panel assembly (See Figs.7 to 9) Remove the side panels L/R and top panel assembly. (1) From the bottom side of the main body, remove the two screws H attaching the front panel assembly. (See Fig.7.) (2) From the forward side of the micom board, disconnect the card wire from the connector CN426. (See Fig.8.) (3) Disconnect the wire from the connector CN501 on the mi- com board. (See Fig.8.) (4) From the right side of the main body, remove the screw J and remove the earth wire. (See Fig.8.) Reference: When attaching the screw J, attach the earth wire with it as before. (See Fig.8.) After attaching the earth wire, fix it with the spacer as before. (See Fig.8.) (5) From the bottom and both sides of the main body, release the joints (d, e) of the front panel assembly and remove the front panel assembly in the direction of the arrow. (See Figs.7 to 9.) Fig.7 Fig.8 Fig.9 Front panel assembly d H H Front panel assembly CN426 CN501 e Micom board Earth wire J Spacer Front panel assembly e (No.MB433)1-9 3.1.4Removing the tuner (See Figs.10 and 11) Remove the side panels L/R and top panel assembly. (1) From the back side of the main body, remove the two screws K attaching the tuner to the rear panel. (See Fig.10.) (2) Disconnect the card wire from the connector CN1 on the tuner. (See Fig.11.) Fig.10 Fig.11 K K Tuner Tuner CN1 1-10 (No.MB433) 3.1.5Removing the rear panel (See Fig.12) Remove the side panels L/R and top panel assembly. (1) From the back side of the main body, remove the ten screws M and screw N attaching the rear panel. (2) From the top side of the main body, disconnect the earth wire from the rear panel in the direction of the arrow. (3) From the both sides of the main body, release the joints f and remove the rear panel. Fig.12 M M N M Rear panel ff Rear panel Earth wire M (No.MB433)1-11 3.1.6Removing the switching power supply (See Figs.13 and 14) Remove the side panels L/R, top panel assembly and rear panel. (1) From the top side of the main body, disconnect the wire from the connector CN200 on the regulator board. (See Fig.13.) (2) Take out the switching power supply in the direction of the arrow. (See Fig.14.) Fig.13 Fig.14 Regulator board CN200 Wire holder Switching power supply 1-12 (No.MB433) 3.1.7Removing the digital amplifier board assembly (See Figs.15 and 16) Remove the side panels L/R, top panel assembly, rear panel and switching power supply. (1) From the top side of the main body, remove the screw P at- taching the digital amplifier board assembly. (See Fig.15.) (2) From the left side of the main body, disconnect the connec- tors (CN310, CN311, CN312) on the digital amplifier board assembly from the regulator board. (See Fig.16.) (3) Release the joint g of the shield case B in the direction of the arrow and take out the digital amplifier board assembly from the main body. (See Fig.16.) Fig.15 Fig.16 Digital amplifier board assembly P Digital amplifier board assembly Shield case B CN312 CN311 CN310 Regulator board g (No.MB433)1-13 3.1.8Removing the digital amplifier board (See Figs.17 to 22) Remove the side panels L/R, top panel assembly, rear panel, switching power supply and digital amplifier board assembly. (1) From the