Jvc-UXF-2-Service-Manual电路原理图.pdf
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1、SERVICE MANUALCOPYRIGHT 2010 Victor Company of Japan, LimitedNo.MB7362010/6MICRO COMPONENT SYSTEMMB73620106SERVICE MANUALUX-F2BE, UX-F2BEN, UX-F2BEV, UX-F2BUS, UX-F2BUWCOPYRIGHT 2010 Victor Company of Japan, LimitedLead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigra
2、de)TABLE OF CONTENTS1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-42 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3、 . . . . . . . . . . 1-73 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-74 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4、. . . . . . . . . . . . . . . . . . . 1-105 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-102SP-UXF2BSP-UXF2BCA-UXF2Bonly for Europe1-2 (No.MB736)SPECIFICATIONDesign and specifications are subject t
5、o change without notice.For Europe(Main unit CA-UXF2B)GeneralPower source AC 230 V , 50 HzPower consumption (at operation) 40 WPower consumption (on standby) 1.00 W or lessDimensions (approx.) (W x H x D) (including projecting parts) 236 mm 123 mm 285 mmMass (approx.) 2.0 kgAmplifierOutput Power 100
6、 W (50 W + 50 W) at 6 (10% THD)Audio Input AUDIO IN: Stereo mini ( 3.5 mm)Speaker impedance 6 - 16 TunerFM frequency 87.50 MHz - 108.00 MHzUSBUSB specification Compatible with USB 2.0 Full SpeedCompatible device Mass storage classCompatible system FAT16, FAT32Output power DC 5 V 500 mASDCompatible d
7、evice SD, SDHCCompatible system FAT16, FAT32Speaker SP-UXF2BSpeaker type Bass-reflex typeTweeter 4 cmWoofer 12 cmImpedance 6 Dimensions (approx.) (W x H x D) (including projecting parts) 141 mm 250 mm 181 mmMass (approx.) 1.8 kg each(No.MB736)1-3SPECIFICATIONDesign and specifications are subject to
8、change without notice.For Asia(Main unit CA-UXF2B)GeneralPower source AC 110 - 127 V/AC 220 - 240 V (adjustable with the voltage selector),50 Hz/60 HzPower consumption (at operation) 40 WPower consumption (on standby) 1.00 W or lessDimensions (approx.) (W x H x D) (including projecting parts) 236 mm
9、 123 mm 285 mmMass (approx.) 2.0 kgAmplifierOutput Power 100 W (50 W + 50 W) at 6 (10% THD)Audio Input AUDIO IN: Stereo mini ( 3.5 mm)Speaker impedance 6 - 16 TunerFM frequency 87.50 MHz - 108.00 MHzAM frequency 531 kHz - 1 710 kHz (at 9 kHz intervals)530 kHz - 1 710 kHz (at 10 kHz intervals)USBUSB
10、specification Compatible with USB 2.0 Full SpeedCompatible device Mass storage classCompatible system FAT16, FAT32Output power DC 5 V 500 mASDCompatible device SD, SDHCCompatible system FAT16, FAT32Speaker SP-UXF2BSpeaker type Bass-reflex typeTweeter 4 cmWoofer 12 cmImpedance 6 Dimensions (approx.)
11、(W x H x D) (including projecting parts) 141 mm 250 mm 181 mmMass (approx.) 1.8 kg each1-4 (No.MB736)SECTION 1PRECAUTION1.1 Safety Precautions(1) This design of this product contains special hardware andmany circuits and components specially for safety purpos-es. For continued protection, no changes
12、 should be madeto the original design unless authorized in writing by themanufacturer. Replacement parts must be identical tothose used in the original circuits. Services should be per-formed by qualified personnel only.(2) Alterations of the design or circuitry of the product shouldnot be made. Any
13、 design alterations of the product shouldnot be made. Any design alterations or additions will voidthe manufacturers warranty and will further relieve themanufacture of responsibility for personal injury or propertydamage resulting therefrom.(3) Many electrical and mechanical parts in the products h
14、avespecial safety-related characteristics. These characteris-tics are often not evident from visual inspection nor can theprotection afforded by them necessarily be obtained by us-ing replacement components rated for higher voltage, watt-age, etc. Replacement parts which have these specialsafety cha
15、racteristics are identified in the Parts List of Ser-vice Manual. Electrical components having such featuresare identified by shading on the schematics and by ( ) onthe Parts List in the Service Manual. The use of a substitutereplacement which does not have the same safety charac-teristics as the re
16、commended replacement parts shown inthe Parts List of Service Manual may create shock, fire, orother hazards.(4) The leads in the products are routed and dressed with ties,clamps, tubings, barriers and the like to be separated fromlive parts, high temperature parts, moving parts and/orsharp edges fo
17、r the prevention of electric shock and firehazard. When service is required, the original lead routingand dress should be observed, and it should be confirmedthat they have been returned to normal, after reassem-bling.(5) Leakage shock hazard testingAfter reassembling the product, always perform an
18、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 productis safe to operate without danger of electrical shock.Do notuse a line isolation transformer during this check. Plug the AC li
19、ne cord directly into the AC outlet. Using a“Leakage Current Tester“, measure the leakage currentfrom each exposed metal parts of the cabinet, particular-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.)
20、. 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 manner. 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 th
21、e AC voltage across the resistor with the ACvoltmeter. Move the resistor connection to each exposed metalpart, particularly any exposed metal part having a returnpath to the chassis, and measure the AC voltage acrossthe resistor. Now, reverse the plug in the AC outlet andrepeat each measurement. Vol
22、tage 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 manufactured tomeet international safety standards.(2) It is the legal responsibility of the repairer to ensure thatthese safety standards are maintained.(3
23、) Repairs must be made in accordance with the relevantsafety standards.(4) It is essential that safety critical components are replacedby approved parts.(5) If mains voltage selector is provided, check setting for localvoltage.1.3 CautionBurrs formed during molding may be left over on some partsof t
24、he 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 parts appearing on the silk-screenprinted side (parts side) of the PWB diagrams, the parts that areprinted over with black such as the resistor (
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