JVC-UXP400-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.MB262 2004/6 MICRO COMPONENT SYSTEM MB26220046 UX-P400 TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

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

3、 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-30 5TROUBLE SHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4、 . . . 1-31 Area suffix US - Singapore UF - China UP - Korea UT - Taiwan UW - Brazil,Mexico,Peru CA-UXP400SP-UXP400SP-UXP400 RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB262) SPECIFICATION Design and specifications are subject to change without notice. Amplifier sectionOutput Power40 W (20 W + 20 W) at 4 (10%

5、THD) Speakers/Impedance4 - 16 Audio Input AUX400 mV/50 k Tuner sectionFM tuning range87.50 MHz - 108.00 MHz AM (MW) tuning range531 kHz - 1 710 kHz (at 9 kHz intervals) 530 kHz - 1 710 kHz (at 10 kHz intervals) CD player sectionDynamic range88 dB Signal-to-noise ratio93 dB Wow and flutterImmeasurabl

6、e Cassette deck sectionFrequency responseNormal (type I):50 Hz - 14 000 Hz Wow and flutter0.15% (WRMS) SpeakersSpeaker units10 cm cone 1 Impedance4 Dimensions (approx.)145 mm 230 mm 191 mm (W/H/D) Mass (approx.)1.8 kg each GeneralPower requirementAC 110 V/AC 127 V/AC 220 V/AC 230 V - AC 240 V (adjus

7、table with the voltage selector), 50 Hz/60 Hz Power consumption50 W (at operation) 4.4 W (on standby) Dimensions (approx.)170 mm 230 mm 311 mm (W/H/D) Mass (approx.)4.5 kg RadioFans.CN 收音机爱 好者资料库 (No.MB262)1-3 SECTION 1 PRECAUTION 1.1Safety Precautions (1) This design of this product contains specia

8、l 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

9、- 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 responsib

10、ility 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

11、 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 th

12、e 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

13、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 confirme

14、d 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.

15、) 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, parti

16、cular- 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

17、 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 m

18、etal 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 d

19、esigned 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

20、 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 f

21、or 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 us

22、e 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-

23、4 (No.MB262) 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 p

24、revent 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

25、 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 tra

26、nsport 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

27、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

28、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

29、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

30、 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 (co

31、nductive sheet) or iron palate (caption) Anti-static wrist strap CD pickup Short land section Traverse mechanism assembly CD servo board CN601 Card wire (No.MB262)1-5 1.8Important for laser products 1.CLASS 1 LASER PRODUCT 2.DANGER : Invisible laser radiation when open and inter lock failed or defea

32、ted. 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 CD,MD and DVD player uses invisible laser radiation and is equipped with safety switches which

33、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

34、 other 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

35、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 maskinen er ben eller interlocken fejeler. Undg di

36、rekte 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) VA

37、RNING : 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 laserstrlin

38、g nr maskinen er ben eller interlocken fejeler. Undg direkte eksponering til strling. (d) WARNING LABEL 1-6 (No.MB262) SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. (No.MB262)1-7 SECTION 3 DISASSEMBLY 3.1Main body section 3.1.1Removing t

39、he 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. (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.)

40、(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 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 Sid

41、e panel L B B Bottom chassis Side panel R Top cover assembly a a a Side panel R Top cover assembly b b b Side panel L 1-8 (No.MB262) 3.1.2Removing the front 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

42、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 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.

43、(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) 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

44、 the connector CN271 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 Fig.8 1 2 Front panel assembly Slide cam Tray Tray fitting Front panel assembly C c d Front panel assembly C c d Front panel assembly CN271 Main bo

45、ard CN730Card wire Wire (No.MB262)1-9 3.1.3Removing the top cover assembly (See Figs.9 and 10) Prior to performing the following procedures, remove 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 p

46、anel. (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. (See Fig.10.) (3) Take out the top cover assembly from the main body. Fig.9 Fig.10 Top cover assembly D Rear panel Top cover assembly Card wires CN702 CN701 Ma

47、in board 1-10 (No.MB262) 3.1.4Removing the cassette mechanism assembly (See Fig.11) Prior to performing the following procedures, remove the side panels L/R, front panel assembly and top cover assembly. (1) From the bottom side of the top cover assembly, discon- nect the card wires from the connecto

48、rs (CN33, CN34) on the head amp. & mechanism control board. (2) Remove the four screws E attaching the cassette mecha- nism assembly and take out the cassette mechanism as- sembly from the top cover assembly. Fig.11 E CN34 CN33 Cassette mechanism assembly Head amp. & mechanism control board Top cove

49、r assembly Card wires E (No.MB262)1-11 3.1.5Removing the tuner (See Figs.12 and 13) Prior to performing the following procedures, remove the side panel L. (1) From the back side of the main body, remove the two screws F attaching the tuner to the rear panel. (See Fig.12.) (2) Disconnect the card wire from the connector CN1 on the tuner. (See Fig.13.)