Jvc-UXS-15-Service-Manual电路原理图.pdf

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1、SERVICE MANUALCOPYRIGHT 2007 Victor Company of Japan, LimitedNo.MB6302007/9MICRO COMPONENT SYSTEMMB63020079SERVICE MANUALUX-S15B, UX-S15E, UX-S15EN, UX-S15EVCOPYRIGHT 2007 Victor Company of Japan, LimitedLead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)TABLE OF

2、 CONTENTS1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3、. . . . . 1-63 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-64 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4、 . . . . . . . . . . . . . 1-135 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14EV onlyCA-UXS15SP-UXS15 SP-UXS15SERVICE POLICYNo service part is available for this model.Exchange only.1-2 (No.MB630

5、)SPECIFICATIONDesign and specifications are subject to change without notice.Amplifier section Output Power 5 W per channel min. RMS driven into 4 at 1 kHz with no more than 10% total harmonicdistortion. (IEC268-3)Speakers/Impedance 4 - 8 Tuner section FM tuning range 87.50 MHz - 108.00 MHzAM (MW) t

6、uning range 522 kHz - 1 629 kHzCD player section Dynamic range 60 dBSignal-to-noise ratio 60 dBWow and flutter ImmeasurableCassette deck section Frequency response Normal (type I): 125 Hz - 8 kHzWow and flutter 0.35% (WRMS)General Power requirement AC 230 V , 50 HzPower consumption 26 W (at operatio

7、n)0.9 W (on standby)Dimensions (approx.) 141 mm 211 mm 216 mm (W/H/D)Mass (approx.) 2.6 kgSpeakers Type 1-way Bass reflexSpeaker units 10 cm cone 1Impedance 4 Dimensions (approx.) 136 mm 212 mm 178 mm (W/H/D)Mass (approx.) 1.3 kg each(No.MB630)1-3SECTION 1PRECAUTION1.1 Safety Precautions(1) This des

8、ign of this product contains special hardware andmany circuits and components specially for safety purpos-es. For continued protection, no changes should be madeto the original design unless authorized in writing by themanufacturer. Replacement parts must be identical tothose used in the original ci

9、rcuits. Services should be per-formed by qualified personnel only.(2) Alterations of the design or circuitry of the product shouldnot be made. Any design alterations of the product shouldnot be made. Any design alterations or additions will voidthe manufacturers warranty and will further relieve the

10、manufacture of responsibility for personal injury or propertydamage resulting therefrom.(3) Many electrical and mechanical parts in the products havespecial safety-related characteristics. These characteris-tics are often not evident from visual inspection nor can theprotection afforded by them nece

11、ssarily be obtained by us-ing replacement components rated for higher voltage, watt-age, etc. Replacement parts which have these specialsafety characteristics are identified in the Parts List of Ser-vice Manual. Electrical components having such featuresare identified by shading on the schematics an

12、d by ( ) onthe Parts List in the Service Manual. The use of a substitutereplacement which does not have the same safety charac-teristics as the recommended replacement parts shown inthe Parts List of Service Manual may create shock, fire, orother hazards.(4) The leads in the products are routed and

13、dressed with ties,clamps, tubings, barriers and the like to be separated fromlive parts, high temperature parts, moving parts and/orsharp edges for the prevention of electric shock and firehazard. When service is required, the original lead routingand dress should be observed, and it should be confi

14、rmedthat they have been returned to normal, after reassem-bling.(5) Leakage shock hazard testingAfter 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

15、 be sure the productis safe to operate without danger of electrical shock.Do notuse 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 currentfrom each exposed metal parts of the cabinet, particular-

16、ly any exposed metal part having a return path to thechassis, to a known good earth ground. Any leakage cur-rent must not exceed 0.5mA AC (r.m.s.). Alternate check methodPlug the AC line cord directly into the AC outlet. Use anAC voltmeter having, 1,000 per volt or more sensitivityin the following m

17、anner. Connect a 1,500 10W resistorparalleled 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 ACvoltmeter. Move the resistor connection to each exposed metalpart, particularly any exposed metal part having

18、a returnpath to the chassis, and measure the AC voltage acrossthe resistor. Now, reverse the plug in the AC outlet andrepeat each measurement. Voltage measured any mustnot exceed 0.75 V AC (r.m.s.). This corresponds to 0.5mA AC (r.m.s.). 1.2 Warning(1) This equipment has been designed and manufactur

19、ed tomeet international safety standards.(2) It is the legal responsibility of the repairer to ensure thatthese safety standards are maintained.(3) Repairs must be made in accordance with the relevantsafety standards.(4) It is essential that safety critical components are replacedby approved parts.(

20、5) If mains voltage selector is provided, check setting for localvoltage.1.3 CautionBurrs formed during molding may be left over on some partsof the chassis. Therefore, pay attention to such burrs in the case of pre-forming repair of this system.1.4 Critical parts for safetyIn regard with component

21、parts appearing on the silk-screenprinted side (parts side) of the PWB diagrams, the parts that areprinted over with black such as the resistor ( ), diode ( )and ICP ( ) or identified by the “ “ mark nearby are criticalfor safety. When replacing them, be sure to use the parts of thesame type and rat

22、ing as specified by the manufacturer. (This regulation dose not Except the J and C version)Good earth groundPlace this probe on each exposedmetal part.AC VOLTMETER(Having 1000 ohms/volts,or more sensitivity)1500 10W0.15 F AC TYPE1-4 (No.MB630)1.5 Safety Precautions (U.K only)(1) This design of this

23、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.

24、(2) Any unauthorised design alterations or additions will void the manufacturers guarantee; furthermore the manufacturer cannotaccept responsibility for personal injury or property damage resulting therefrom.(3) Essential safety critical components are identified by ( ) on the Parts List and by shad

25、ing on the schematics, and must neverbe replaced by parts other than those listed in the manual. Please note however that many electrical and mechanical parts inthe product have special safety related characteristics. These characteristics are often not evident from visual inspection. Partsother tha

26、n specified by the manufacturer may not have the same safety characteristics as the recommended replacement partsshown 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 th

27、e 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 isrequired, the original lead routing and dress should be observed, and it should be confirmed that they have been returned tonormal, afte

28、r re-assembling.1.5.1 Warning(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 mu

29、st 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. Therefo

30、re, pay attention to such burrs in the case of preforming repair of this system.(No.MB630)1-51.6 Important for laser products1.CLASS 1 LASER PRODUCT 2.CAUTION : (For U.S.A.) Visible and/or invisible class II laser radiationwhen open. Do not stare into beam.(Others) Visible and/or invisible class 1M

31、laser radiationwhen open. Do not view directly with optical instruments. 3.CAUTION : Visible and/or invisible laser radiation whenopen and inter lock failed or defeated. Avoid directexposure to beam.4.CAUTION : This laser product uses visible and/or invisible laser radiation and is equipped with saf

32、ety 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 ableto function. 6.CAUTION : Use of controls, adjustments or performa

33、nce 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 operationcheck. WARNING LABEL and PRINT1-6 (No.MB630)SECTION 2

34、SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.SECTION 3DISASSEMBLY3.1 Main body3.1.1 Removing the REAR COVER (See Fig.1 to 4)(1) Remove the two screws A, two screws B, two screws Cand two screws D attaching the REAR COVER. (See Fig1)(2) Remove the t

35、wo screws E attaching the both side of REARCOVER. (See Fig.2)(3) Disconnect the connector wire from AMP BOARD assem-bly connected to connector CN404 of the POWER BOARDassembly. (See Fig.3)(4) Disconnect the connector wire from POWER TRANS-FORMER connected to connector CN401 of the AMPBOARD assembly.

36、 (See Fig.4)Fig.1ABCD(No.MB630)1-7Fig.2Fig.3Fig.4ECN404CN4011-8 (No.MB630)3.1.2 Removing the POWER BOARD assembly (See Fig.5)(1) Disconnect the POWER CORD connected to connecterCN407 of the POWER BOARD assembly.(2) Disconnect the connector wire from POWER TRANS-FORMER connected to connector CN406 of

37、 the POWERBOARD assembly.(3) Remove the two screws F attaching the POWER BOARDassembly.Fig.5CN406 CN407F(No.MB630)1-93.1.3 Removing the AMP BOARD assembly (See Fig.6 to 9)(1) Remove the two screws G attaching the AMP BOARD as-sembly. (See Fig.6)(2) Disconnect the card wire from TUNER PACK connected

38、toconnector CN303 of the AMP BOARD assembly.(3) Disconnect the connector wire from FRONT BOARD as-sembly connected to connector CN302 of the AMPBOARD assembly.(4) Disconnect the connector wire from R/P HEAD connectedto connector CN201 of the AMP BOARD assembly.(5) Disconnect the connector wire from

39、ERASE HEAD con-nected to connector CN202 of the AMP BOARD assembly.(6) Disconnect the connector wire from DOOR SWITCH con-nected to connector CN707 of the AMP BOARD assembly.(7) Disconnect the connector wire from PHONE BOARD as-sembly connected to connector CN205 of the AMPBOARD assembly.(8) Disconn

40、ect the card wire from FRONT BOARD assemblyconnected to connector CN301 of the AMP BOARD as-sembly.(9) Remove the two screws H attaching the TUNER PACK.(See Fig.7)(10) Disconnect the connector wire from AMP BOARD assem-bly connected to connector CN901 of the CD BOARD as-sembly. (See Fig.8)(11) Disco

41、nnect the connector wire from AMP BOARD assem-bly connected to CASSETTE MECHANISM BOARD as-sembly. (See Fig.9)Fig.6Fig.7Fig.8Fig.9CN303CN201GGCN302CN202CN301CN205 CN707HCN901connector1-10 (No.MB630)3.1.4 Removing the CASSETTE MECHANISM assembly (See Fig.10)(1) Remove the four screws J attaching the CASSETTEMECHANISM assembly.Fig.10JJ