JVC-UXH100-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.MB248 2004/7 MICRO COMPONENT SYSTEM MB24820047 UX-H100 TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

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

3、 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4、 . . . 1-17 Area suffix A - Australia US - Singapore UT - Taiwan UW - Brazil,Mexico,Peru UJ - U.S.Military RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB248) SPECIFICATION Design and specifications are subject to change without notice. Amplifier Section-CA-UXH100 Output Power10 W per channel, min. RMS, driven i

5、nto 6 at 1 kHz, with no more than 10% total harmonic distortion (IEC 268-3) Speakers/Impedance6 - 16 TunerFM tuning rangeFM 100 kHz intervals 87.5 MHz-108.0 MHz FM 50 kHz intervals87.50 MHz-108.00 MHz AM tuning rangeAM 10 kHz intervals530 kHz-1 710 kHz AM 9 kHz intervals:531 kHz-1 710 kHz CD playerD

6、ynamic range85 dB Signal-to-noise ratio85 dB Wow and flutterImmeasurable Cassette deckFrequency response Normal (type I)100 Hz-10 000 Hz Wow and flutter0.35 % (WRMS) GeneralPower requirementAC 110V-127V/220V-240 V , adjustable with the voltage selector, 50 Hz/60 Hz Power consumption38 W (at operatio

7、n) 2 W (on standby) Dimensions (W/H/D) (approx.)144 mm 255 mm 277 mm Mass (approx.)2.9 kg Speaker Section-SP-UXH100 TypeFull range Bass-reflex type Speakers10 cm cone 1 Power handling capacity10 W Impedance6 Frequency range100 Hz to 15 kHz Dimensions (W/H/D) (approx.)130 mm 257 mm 151 mm Mass (appro

8、x.)1.5 kg each RadioFans.CN 收音机爱 好者资料库 (No.MB248)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 original design unles

9、s 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 alterations of the product sho

10、uld 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 safety-related charac

11、teristics. 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 characteristics are identified

12、 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 recommended replacement

13、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 edges for the prevention

14、 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 perform an isola- tio

15、n 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. Plug the AC line co

16、rd 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 0.5mA AC (r.m.s.).

17、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 earth ground. Measur

18、e 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 repeat each measure

19、ment. 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 safety standards are

20、 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 molding may be left o

21、ver 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 printed over with bla

22、ck 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 earth ground Place this

23、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.MB248) 1.5Preventing static electricity Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is dischar

24、ged, 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 laser products. Be ca

25、reful 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 yourself Use an anti-stat

26、ic 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 the shorted parts to t

27、heir 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 unit (optical pickup

28、) 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 traverse unit. Be car

29、eful 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 traverse unit is deco

30、mposed *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 destroyed by static elec

31、tricity.) 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 Soldering Flexible cable CD changer unit (No.MB248)1-5 1.8Important for laser products 1.CLA

32、SS 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 complete Laser Unit if it malfunctions. 4.CAUTION : The

33、 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 switches. 5.CAUTION : If safety switches malfunction, the

34、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 laser radiation when open and interlock failed or defeat

35、ed. 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 lasersteilylle. Vlt steen kohdistumista suoraan itseesi. (f)

36、 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. CLASS 1 LASER PRODUCT CAUTION : Visible and Invisible l

37、aser 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 laser

38、steilylle. 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.MB248) SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFI

39、C SERVICE INSTRUCTIONS. (No.MB248)1-7 SECTION 3 DISASSEMBLY 3.1Disassembly of the main blocks of the set 3.1.1Replacing the fuses (See Fig.1) Prior to performing the following procedure, remove the rear cover. (1) Replace the fuses inside. Caution: Be sure to use fuses with the specified ratings. Fi

40、g.1 3.1.2Replacing the power IC (See Fig.2) Prior to performing the following procedure, remove the rear cover. (1) Remove the two screws A from the heat sink between the power IC. (2) Remove the solder fixing the power IC. Fig.2 Fuse (F901) 800MAL 250V Fuse (F902) T315MAL 250V A 1-8 (No.MB248) 3.1.

41、3Removing the rear cover (See Fig.3 and 4) (1) Remove the seven screws C that retain the rear cover from the back of the body. (2) Remove the eight screws D that retain the rear cover from the two sides of the body. (3) Remove the rear cover from the body by pulling it toward the back. Caution: The

42、FM terminal wire (inside) must be pulled out, while remov- ing the rear cover. Fig.3 Fig.4 Rear cover C C C D DD (No.MB248)1-9 3.1.4Removing the CD chassis assembly (See Fig.5 to 8) Prior to performing the following procedures, remove the rear cover. (1) Remove a screw E retaining the main board ont

43、o the CD chassis. (2) Disconnect the two FFC cables X1, X2 from the connectors CN704, CN703 on the CD board. (3) Disengage the claws F on both sides of the body, while moving the CD chassis assembly downward and back- ward. (4) Before you take away the CD chassis assembly, you must disconnect the wi

44、re from the connector CN204 on the main board. (Fig.8) Caution: You must ensure that the two claws of the CD chassiss top G are disengaged, while moving the CD chassis assembly. Fig.5 Fig.6 Fig.7 Fig.8 EF X1 X2 G Cassette mechanism 1-10 (No.MB248) 3.1.5Removing the CD mechanism (See Fig.9 to 13) Pri

45、or to performing the following procedures, remove the rear cover. Also remove the CD chassis assembly. (1) Remove the three screws Y1 retaining the CD board. (2) Disconnect the FFC cable Y2 from the connector CN701. (3) Disconnect the two parallel wires Y3 from the connector. (4) Remove the four scr

46、ews Y4 with washers retaining the CD mechanism. Fig.9 Fig.10 Fig.11 Fig.12 Fig.13 Y1 Y2 Y3 Y3 Y4 (No.MB248)1-11 3.1.6Removing the bottom base assembly (See Fig.14 to 18) Prior to performing the following procedures, remove the rear cover. Also remove the CD chassis assembly. (1) Remove the two screw

47、s H retaining the front panel assem- bly. (2) Disengage the wire Q that fix the cassette deck wire. (3) Disconnect the cassette head wire Z1 and the cassette mo- tor wire Z2 of power supply from the connectors CN202, CN203, and then disconnect the AUX IN connecting wire Z3 from the connector TP1. (4

48、) Disengage the claws I on both sides of the front cabinet as- sembly and then move the bottom base assembly toward the back. Caution: You must ensure that the 30 pin connector CN201 is discon- nected (See Fig.15). Fig.14 Fig.15 Fig.16 Fig.17 Fig.18 Q CN201 H I Front panel Circuit board Z1Z2Z3 1-12

49、(No.MB248) 3.1.7Removing the main board (See Fig.19 and 20) Prior to performing the following procedures, remove the rear cover. Also remove the CD chassis assembly. Also remove the bottom base assembly. (1) Disengage the wire M and then disconnect the parallel wire from the connectors CN902 (See Fig.20). (2) Removing the screw N retaining the main board ont