JVC-UXP550-cs-sm 电路图 维修手册.pdf

《JVC-UXP550-cs-sm 电路图 维修手册.pdf》由会员分享，可在线阅读，更多相关《JVC-UXP550-cs-sm 电路图 维修手册.pdf（81页珍藏版）》请在收音机爱好者资料库上搜索。

1、SERVICE MANUAL COPYRIGHT 2004 Victor Company of Japan, Limited No.MB286 2004/7 MICRO COMPONENT SYSTEM MB28620047 UX-P550 TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

2、2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

3、 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4、 . . . 1-38 Area suffix US - Singapore UB - Hong Kong UW - Brazil,Mexico,Peru UX - Saudi Arabia UJ - U.S.Military UN - Asean CA-UXP550SP-UXP550SP-UXP550 RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB286) SPECIFICATION Designs and Specifications are subject to change without notice. Amplifier sectionOutput Power

5、HIGH:40 W (20 W + 20 W) at 4 (10% THD) LOW:40 W (20 W + 20 W) at 4 (10% THD) Audio InputAUX:400 mV/50 k Digital outputDVD OPTICAL DIGITAL OUT:-21 dBm to -15 dBm (660 nm 30 nm) Video outputColor system:NTSC/PAL selectable VIDEO (composite)1 V(p-p)/75 S-VIDEOY (luminance):1 V(p-p)/75 C (chrominance, b

6、urst):0.286 V(p-p)/75 COMPONENT(Y):1 V(p-p)/75 (PB/PR):0.7 V(p-p)/75 Speakers/Impedance4 - 16 Tuner sectionFM tuning range87.5 MHz - 108.0 MHz AM (MW) tuning range 531 kHz - 1 710 kHz (at 9 kHz intervals) 530 kHz - 1 710 kHz (at 10 kHz intervals) Tape sectionFrequency response60 Hz - 14 000 Hz Wow a

7、nd flutter0.15% (WRMS) Disc player sectionPlayable discDVD Video/DVD Audio CD/VCD/SVCD CD-R/CD-RW (CD/SVCD/VCD/MP3/WMA/JPEG format) DVD-R/DVD-RW (Video format) Dynamic range90 dB Horizontal resolution500 lines Wow and flutterImmeasurable SpeakersSpeaker unitsHIGH4 cm cone 1 LOW10 cm cone 1 Impedance

8、HIGH4 LOW4 Dimensions (approx.)145 mm 230 mm 202 mm (W/H/D) Mass (approx.)2.2 kg each GeneralPower requirementAC 110 V/AC 127 V/AC 220 V/ AC 230 V - AC 240 V (adjustable with the voltage selector) 50 Hz/60 Hz Power consumption90 W (at operation) 4.9 W (on standby) Dimensions (approx.)170 mm 230 mm 3

9、11 mm (W/H/D) Mass (approx.)5.6 kg RadioFans.CN 收音机爱 好者资料库 (No.MB286)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 o

10、riginal 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 alteration

11、s 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 s

12、afety-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 characteri

13、stics 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 reco

14、mmended 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 edge

15、s 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 p

16、erform 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.

17、 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

18、 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

19、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

20、 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

21、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 m

22、olding 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 p

23、rinted 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 eart

24、h 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.MB286) 1.5Preventing static electricity Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fab

25、ric, 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 l

26、aser 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 yours

27、elf 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 th

28、e 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

29、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 t

30、raverse 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 t

31、raverse 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 dest

32、royed 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 Connecto

33、r (No.MB286)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 co

34、mplete 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 switc

35、hes. 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 CAUTION : Visible and Invisible las

36、er radiation when open and interlock failed or defeated. AVOID DIRECT EXPOSURE TO BEAM. (e) VARNING : 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 laserst

37、eilylle. Vlt steen kohdistumista suoraan itseesi. (f) ADVARSEL : Synlig og usynlig laserstrling nr maskinen er ben eller interlocken fejeler. Undg direkte 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. CL

38、ASS 1 LASER PRODUCT 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 sprren r urkopplad. Betrakta ej strlen. (s) VARO : Avattaessa ja suojalukitus ohitettuna tai

39、 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 eksponering til strling. (d) WARNING LABEL 1-6 (No.MB286) SECTION 2 SPECIFIC SERVICE INSTR

40、UCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. (No.MB286)1-7 SECTION 3 DISASSEMBLY 3.1Main body section 3.1.1Removing the side panels L/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 to the rear panel.

41、 (See Fig.1.) (2) From the bottom side of the main body, remove the two screws B attaching the side panels L/R to the bottom chas- sis. (See Fig.2.) (3) From the both sides of the main body, release the engage- ment sections (a, b) of the side panels L/R from the top cover assembly in the direction

42、of the arrow. (See Figs.3 and 4.) (4) Remove the side panels L/R toward this side. Fig.1 Fig.2 Fig.3 Fig.4 Side panel RSide panel L Rear panel AA Side panel L B BBottom chassis Side panel R Top cover assembly a a a Side panel R b b b Side panel L Top cover assembly 1-8 (No.MB286) 3.1.2Removing the f

43、ront panel assembly (See Figs.5 to 8) Prior to performing the following procedures, remove the side panels L/R. (1) From the right side of the main body, push the slide cam and pull the tray out of the main body in the direction of the arrow 1. (See Fig.5.) (2) Remove the tray fitting from the tray

44、in the direction of the arrow 2. (See Fig.5.) (3) From the both sides of the main body, remove the two screws C attaching the front panel assembly. (See Figs.6 and 7.) (4) Release the two claws c and claws d to draw out the front panel assembly in the direction of the arrow. (See Figs.6 and 7.) (5)

45、From the right side of the main body, disconnect the card wire from the connector CN730 on the main board. (See Fig.8.) (6) Disconnect the wire from the connector CN270 on the main board. (See Fig.8.) (7) Remove the front panel assembly in the direction of the ar- row. (See Fig.8.) Fig.5 Fig.6 Fig.7

46、 Fig.8 1 2 Front panel assembly Slide cam Tray assembly Tray fitting Front panel assembly C c d Front panel assembly C c d Front panel assembly CN270 Main board CN730 Card wire Wire (No.MB286)1-9 3.1.3Removing the top cover assembly (See Figs.9 to 11) Prior to performing the following procedures, re

47、move the side panels L/R and front panel assembly. (1) From the back side of the main body, remove the screw D attaching the top cover assembly to the rear panel. (See Fig.9.) (2) From the right side of the main body, disconnect the card wires from the connectors (CN701, CN702) on the main board. (S

48、ee Fig.10.) (3) From the left side of the main body, disconnect the card wire from connector CN601 on the microphone amplifier board. (See Fig.11.) Reference: When reassembling, pass the card wire through the sec- tion e of the microphone amplifier board before connect- ing the card wire to the conn

49、ector CN601. (See Fig.11.) (4) Take out the top cover assembly from the main body. Fig.9 Fig.10 Fig.11 Top cover assembly D Rear panel Top cover assembly Card wires CN702 CN701 Main board Microphone amplifier board CN601e Card wire 1-10 (No.MB286) 3.1.4Removing the cassette mechanism assembly (See Fig.12) Prior to performing the following p