JVC-UXS77-cs-sm 电路图 维修手册.pdf

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1、SERVICE MANUAL COPYRIGHT 2004 Victor Company of Japan, Limited No.MB230 2004/5 COMPACT COMPONENT SYSTEM MB23020045 UX-S77 TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

2、 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-

3、7 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-35 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4、. . . . 1-39 (SP-UXS77)(CA-UXS77)(SP-UXS77) Area suffix A - Australia US - Singapore UW - Brazil,Mexico,Peru UX - Saudi Arabia UJ - U.S.Military UN - Asean RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB230) SPECIFICATION Design and specifications are subject to change without notice. Amplifier sectionOutput Pow

5、erHIGH40 W (20 W+ 20 W) at 4 (10% THD) 50 W (25 W+ 25 W) at 4 (10% MAX) LOW40 W (20 W+ 20 W) at 4 (10% THD) 50 W (25 W+ 25 W) at 4 (10% MAX) Analog inputAUXSensitivity/Impedance (at 1 kHz) 400 mV/47 k (at AUX LEVEL 1) 200 mV/47 k (at AUX LEVEL 2) Digital outputDVD OPTICAL DIGITAL OUT -21 dBm to -15

6、dBm (660 nm 30 nm) VIDEO OUTColor systemNTSC VIDEO (composite)1 V(p-p)/75 S-VIDEOY (luminance):1 V(p-p)/75 C (chrominance, burst):0.286 V(p-p)/75 COMPONENT(Y):1 V(p-p)/75 (PB/PR):0.7 V(p-p)/75 Speaker Terminals4 - 16 OthersAV COMPU LINK 2 (3.5) Tuner sectionFM tuning range87.5 MHz - 108.0 MHz AM tun

7、ing range531 kHz - 1 710 kHz (at 9 kHz) 530 kHz - 1 710 kHz (at 10 kHz) Disc player section Playable discDVD Video/DVD Audio/CD/VCD/SVCD CD-R/CD-RW (recorded in Audio CD/Video CD/ Super Video CD/ MP3/ WMA/JPEG format) DVD-R/DVD-RW (recorded in video format) Dynamic range90 dB Horizontal resolution50

8、0 lines Wow and flutterImmeasurable MP3 recording formatMPEG 1/2 Audio Layer 3 Max. Bit rate320 kbps Cassette deck sectionFrequency responseNormal (type I): 50 Hz - 14 000 Hz Wow and flutter0.15% (WRMS) GeneralPower requirementAC 110 V / AC 127 V / AC 220 V - AC 230 V, (adjustable with the voltage s

9、elector), 50 Hz/60 Hz Power consumption90 W (at operation) 12 W (on standby) 5.3 W (with deactivating the clock indication) Dimensions (approx.)175 mm 237 mm 375 mm (W/H/D) Mass (approx.)7.5 kg SpeakersType2-Way Bass-reflex type Speaker SystemsWoofer: 10 cm cone 1 Power handling capacity Tweeter: 4

10、cm cone 1 HIGH: 20 W LOW: 20 W ImpedanceHIGH: 4 LOW: 4 Frequency range56 Hz - 40 000 Hz Sound pressure level84 dB/Wm Dimensions (approx.)145 mm 236 mm 205 mm (W/H/D) Mass (approx.)2.3 kg each RadioFans.CN 收音机爱 好者资料库 (No.MB230)1-3 SECTION 1 PRECAUTION 1.1Safety Precautions (1) This design of this pro

11、duct 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. Se

12、rvices 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 manu

13、facture 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 nec

14、essarily 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 schemat

15、ics 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

16、 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 i

17、t 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,

18、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 o

19、f 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 mor

20、e 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, partic

21、ularly 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

22、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 cri

23、tical 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.

24、 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

25、 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 RadioF

26、ans.CN 收音机爱 好者资料库 1-4 (No.MB230) 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.

27、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

28、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 maintai

29、n 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

30、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, e

31、tc. 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 brea

32、k 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

33、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 Con

34、ductive material (conductive sheet) or iron palate (caption) Anti-static wrist strap DVD pickup DVD changer mechanism assembly Short land sections (No.MB230)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. A

35、void 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 CD,MD and DVD player uses invisible laser radiation and is equipped with safety switches which preven

36、t 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

37、 than those specified here in may result in hazardous radiation exposure. REPRODUCTION AND POSITION OF LABELS CAUTION : Visible and Invisible laser radiation when open and interlock failed or defeated. AVOID DIRECT EXPOSURE TO BEAM. (e) VARNING : Synlig och osynling laserstrlning nr den ppnas och sp

38、rren r urkopplad. Betrakta ej strlen. (s) VARO : Avattaessa ja suojalukitus ohitettuna tai viallisena olet alttiina nkyvlle ja nkymttmlle lasersteilylle. Vlt steen kohdistumista suoraan itseesi. (f) ADVARSEL : Synlig og usynlig laserstrling nr maskinen er ben eller interlocken fejeler. Undg direkte

39、eksponering til strling. (d) ! Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check. CLASS 1 LASER PRODUCT CAUTION : Visible and Invisible laser radiation when open and interlock failed or defeated. AVOID DIRECT EXPOSURE TO BEAM. (e) VARNING

40、: Synlig och osynling laserstrlning nr den ppnas och sprren r urkopplad. Betrakta ej strlen. (s) VARO : Avattaessa ja suojalukitus ohitettuna tai viallisena olet alttiina nkyvlle ja nkymttmlle lasersteilylle. Vlt steen kohdistumista suoraan itseesi. (f) ADVARSEL : Synlig og usynlig laserstrling nr m

41、askinen er ben eller interlocken fejeler. Undg direkte eksponering til strling. (d) WARNING LABEL 1-6 (No.MB230) SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. (No.MB230)1-7 SECTION 3 DISASSEMBLY 3.1Main body section 3.1.1Removing the sid

42、e panels L/R (See Figs.1 to 4) (1) From the both sides of the main body, remove the four screws A attaching the side panels L/R. (See Figs.1 and 2) (2) From the back side of the main body, remove the two screws B and two screws C attaching the side panels L/R to the rear cover and top cover. (See Fi

43、g.3) (3) From the bottom side of the main body, remove the two screws D attaching the side panels L/R. (See Fig.4) (4) Release the claws a of the side panels L/R in the direction of the arrow and remove the side panels L/R from the main body. (See Figs.1 and 2) Fig.1 Fig.2 Fig.3 Fig.4 Side panel L C

44、law aClaw a A Side panel R Claw aClaw a A Side panel L Rear cover Top cover Side panel R C B C B DD Side panel L Side panel R 1-8 (No.MB230) 3.1.2Removing the top cover (See Figs.5 to 7) Prior to performing the following procedure, remove the side panels L/R. (1) From the back side of the main body,

45、 remove the screw E attaching the top cover to the rear cover. (See Fig.5) (2) From the right side of the main body, disconnect the card wires from the connectors CN790 and CN791 on the main board. (See Fig.6) (3) From the both sides of the main body, remove the two screws F attaching the top cover

46、to the front panel assem- bly. (See Fig.7) (4) Release the claws b and remove the top cover from the main body in the direction of the arrow. (See Fig.7) Fig.5 Fig.6 Fig.7 Rear cover Top cover E Top CoverMain board CN791CN790 F F Claw b Claw b G Claw cClaw c Front panel assembly Bottom chassis Top c

47、overTop cover (No.MB230)1-9 3.1.3Removing the front panel assembly (See Figs.7 to 10) Prior to performing the following procedures, remove the side panels L/R and top cover. (1) From the both sides of the main body, remove the two screws G attaching the front panel assembly to the bottom chassis. (S

48、ee Fig.7) (2) From the top side of the main body, remove the screw H at- taching the earth wire on the shield case. (See Fig.8) Reference: When attaching the screw H, attach the earth wire with it. (See Fig.8) (3) From the left side of the main body, disconnect the card wire from the connector CN700

49、 on the main board. (See Fig.9) (4) Disconnect the wire from the connector CN767 on the main board. (See Fig.9) (5) From the both and bottom sides of the main body, release the claws c and d attaching the front panel assembly. (See Figs.7 and 10) (6) Remove the front panel assembly from the main body in the direction of the arrow. (Se