JVC-UXG1-cs-sm 电路图 维修手册.pdf

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1、SERVICE MANUAL COPYRIGHT 2005 Victor Company of Japan, Limited No.MB412 2005/6 MICRO COMPONENT SYSTEM MB41220056 UX-G1 Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade) TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

3、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . .

4、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17 CA-UXG1 SP-UXG1 SP-UXG1 TIMER SET RANDOMSLEEPREPEAT STANDBY/ON TIMER ON/OFF REMAIN BEAT CUT DISPLAY/ CLOCK SET MUTING SOUND/ BASS CD TAPECD VOLUME TUNER/ BAND FM MODEPROGRAM REMOTE CONTROL STANDBY/ON O

5、PEN VOLUME MICRO COMPONENT SYSTEM CD SYNCHRO RECORDING Area suffix US - Singapore UB - Hong Kong UT - Taiwan UW - Brazil,Mexico,Peru UY - Argentina RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB412) SPECIFICATION Amplifier Section-CA-UXG1 Speaker Section-SP-UXG1 Design and specifications are subject to change w

6、ithout notice. Output Power (IEC 268-3)10 W (5 W + 5 W) at 4 (10% THD) Speakers/Impedance4 - 16 TunerFM tuning range87.50 MHz-108.00 MHz AM tuning rangeAM 9 kHz intervals: 531 kHz-1 710 kHz AM 10 kHz intervals: 530 kHz-1 710 kHz CD playerDynamic range85 dB Signal-to-noise ratio85 dB Wow and flutterI

7、mmeasurable Cassette deck Frequency response Normal (type I) 100 Hz-10 000 Hz Wow and flutter0.35 % (WRMS) GeneralPower requirementAC 110 V-127 V/220 V-240 V adjustable with the voltage selector 50 Hz/60 Hz Power consumption22 W (at operation) 4.5 W (on standby) Dimensions (W/H/D) (approx.)145 mm 20

8、9 mm 226 mm Mass (approx.)3.0 kg TypeFull range Bass-reflex type Speakers10 cm cone 1 Power handling capacity5 W Impedance4 Frequency range100 Hz to 15 kHz Dimensions (W/H/D) (approx.)135 mm 209 mm 152 mm Mass (approx.)1.3 kg each RadioFans.CN 收音机爱 好者资料库 (No.MB412)1-3 SECTION 1 PRECAUTION 1.1Safety

9、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 unless authorized in writing by the manufacturer. Replacement parts must be identical to

10、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 should not be made. Any design alterations or additions will void the manufacturers war

11、ranty 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 characteristics. These characteris- tics are often not evident from visual inspection nor

12、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 in the Parts List of Ser- vice Manual. Electrical components having such features a

13、re 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 parts shown in the Parts List of Service Manual may create shock, fire, or other haz

14、ards. (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 of electric shock and fire hazard. When service is required, the original lead rout

15、ing 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- tion check on the exposed metal parts of the product (an- tenna terminals, knobs, metal

16、 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 cord directly into the AC outlet. Using a Leakage Current Tester, measure the leakage

17、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.). Alternate check method Plug the AC line cord directly into the AC outlet. Use an AC

18、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. Measure the AC voltage across the resistor with the AC voltmeter. Move the resistor connec

19、tion 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 measurement. Voltage measured any must not exceed 0.75 V AC (r.m.s.). This corresponds to 0

20、.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 maintained. (3) Repairs must be made in accordance with the relevant safety standar

21、ds. (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 over on some parts of the chassis. Therefore, pay attention to such burrs in the case

22、 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 black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the mark nearby

23、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 probe on each exposed metal part. AC VOLTMETER (Having 1000 ohms/volts, or more sens

24、itivity) 1500 10W 0.15 F AC TYPE RadioFans.CN 收音机爱 好者资料库 1-4 (No.MB412) 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

25、 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 careful to use proper grounding in the area where repairs are being performed. (1) Gro

26、und 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-static wrist strap to release any static electricity built up in your body. (3) Handling

27、 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 their original condition. (Refer to the text.) Do not use a tester to check the condi

28、tion 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) to strong shocks, as it is a sensitive, complex unit. (2) Cut off the shorted part

29、 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 careful not to take too long a time when attaching it to the connector. (3) Handle the

30、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 decomposed *Please refer to Disassembly method in the text for the pickup unit. Apply so

31、lder 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 electricity.) In the assembly, be sure to remove solder from the short land sections aft

32、er connecting the flexible wire. 1M Conductive material (conductive sheet) or iron palate (caption) Anti-static wrist strap CD pickup board Short-circuit point Card wire CD mechanism board CN601 (No.MB412)1-5 1.8Important for laser products 1.CLASS 1 LASER PRODUCT 2.DANGER : Invisible laser radiatio

33、n 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 CD,MD and DVD player uses invisible laser radiation a

34、nd 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 laser is able to function. 6.CAUTION : Use of controls

35、, 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 defeated. AVOID DIRECT EXPOSURE TO BEAM. (e) VARNING : Synli

36、g 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 laserstrling nr maskinen

37、 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 laser radiation when open and interlock failed or defea

38、ted. 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

39、) ADVARSEL : Synlig og usynlig laserstrling nr maskinen er ben eller interlocken fejeler. Undg direkte eksponering til strling. (d) WARNING LABEL 1-6 (No.MB412) SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. (No.MB412)1-7 SECTION 3 DISASS

40、EMBLY 3.1Main body 3.1.1Removing the Rear cover assembly (See Fig.1 to 5) (1) Remove the two screws A, the two screws B on the back of the body. (2) Remove the four screws D on each side of the body. (3) Remove the two screws E on the bottom of the body. (4) Move the front panel assembly in the dire

41、ction of the arrow and remove. Disconnect the wire from connector CN901 on the transformer board and FM-ANT connector CN203 on the main board. Caution: When reassembling, set the joint a on the right and left side to the groove, and move. Fig.1 Fig.2 Fig.3 Fig.4 Fig.5 A B CD mechanism assembly D Fro

42、nt panel assembly E Front panel assembly Rear cover assembly Joint a Joint a Front panel assembly CD mechanism assembly Rear cover assembly CN901 Front panel assembly Rear cover assembly Transformer board Main board CN203 FM-ANT 1-8 (No.MB412) 3.1.2Removing the Main board (See Fig.6, 7) Prior to per

43、forming the following procedure, remove the rear cover assembly. (1) Disconnect the wire from all connectors on the main board. (2) Cut off the band setting the wire. (3) Remove the two screws F and release the joint b. Fig.6 Fig.7 CN801 CN851 CN850 CN370 CN301 CN401 CN402 CN260 Main board CD mechan

44、ism assembly Front panel assembly F Main board CD mechanism assembly Front panel assembly Joint b (No.MB412)1-9 3.1.3Removing the CD mechanism assembly and the Switch board (See Fig.8 to 10) Prior to performing the following procedure, remove the rear cover assembly and the main board. (1) Cut off t

45、he four bands setting the wires. (2) Disconnect the wire from connector on the CD open switch and CN603, CN606 on the CD mechanism board. (3) Remove the two screws G on the front panel assembly. (4) Release the joint d of the CD mechanism assembly. (5) Remove the five screws H attaching the switch b

46、oard to the CD mechanism assembly. (6) Unsolder the switch board, if necessary. Fig.8 Fig.9 Fig.10 CD mechanism board CD mechanism assembly Open switch connecter CN603 CN606 Front panel assembly Band Band Band G G Joint d CD mechanism assembly Front panel assembly Open switch connecter CN603 CN606 H

47、 H Switch board CD mechanism assembly Front panel assembly Solder point 1-10 (No.MB412) 3.1.4Removing the CD mechanism board, CD mechanism (See Fig.11 to 14) Prior to performing the following procedure, remove the rear cover assembly, the main board and the CD mechanism as- sembly. Caution: Make sur

48、e to solder the short-circuit point on the CD pickup board before disconnecting the card wire from connector CN601 on the CD mechanism board and from the CD pickup board. If you do not follow this instruction, the pickup may be damaged. (1) Remove the four screws J on the CD mechanism assem- bly. (2

49、) Disconnect the wire from connector of the CD motor board. (3) Solder the short-circuit point on the CD pickup board, and disconnect the wire from the CD pickup board. Caution: To reattach the CD mechanism board, connect the card wire to connector CN601 on the CD mechanism board and to the CD pickup board, then unsolder the short-cir- cuit point. (4) Remove