JVC-UXG33-cs-sm 电路图 维修手册.pdf

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1、SERVICE MANUAL COPYRIGHT 2006 Victor Company of Japan, Limited No.MB536 2006/6 MICRO COMPONENT SYSTEM MB53620066 UX-G35US,UX-G35UB,UX-G33A, UX-G33US,UX-G33UB,UX-G33UW, UX-G30US,UX-G30UB,UX-G30UW Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade) TABLE OF CONTENT

2、S 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3、 1-7 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4、. . . . . . . . . 1-21 5TROUBLE SHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22 CA-UXG35SP-UXG35SP-UXG35 CA-UXG33SP-UXG33SP-UXG33 CA-UXG30SP-UXG30SP-UXG30 RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB536) SPECIFICATI

5、ON Design and specifications are subject to change without notice. Amplifier sectionOutput Power60 W (30 W + 30 W) at 6 (10% THD) Speakers/Impedance6 - 16 Audio InputAUX500 mV/50 k (at AUX LVL 1) 250 mV/50 k (at AUX LVL 2) 125 mV/50 k (at AUX LVL 3) Tuner sectionFM tuning range531 kHz - 1 710 kHz (a

6、t 9 kHz intervals) AM tuning range530 kHz - 1 710 kHz (at 10 kHz intervals) CD player sectionDynamic range88 dB Signal-to-noise ratio93 dB Wow and flutterImmeasurable Cassette deck sectionFrequency responseNormal (type I): 50 Hz - 14 000 Hz Wow and flutter0.15% (WRMS) SpeakersSpeaker units10 cm cone

7、 1 + 1.5 cm dome 1 Impedance6 Dimensions (approx.)140 mm 231 mm 195 mm (W/H/D) Mass (approx.)1.7 kg each GeneralPower requirementHong Kong AC 220 V , 50 Hz AustraliaAC 240 V , 50 Hz otherAC 110 V/AC 127 V/AC 220 V/AC 230 V - 240 V , 50 Hz/60 Hz (adjustable with the voltage selector) Power consumptio

8、nHong Kong 50 W (at operation) 9.5 W (on standby/display on) 1.1 W (on standby/display off) Australia50 W (at operation) 10 W (on standby/display on) 1.3 W (on standby/display off) other60 W (at operation) 14.8 W (on standby/display on) 3.8 W (on standby/display off) Dimensions (approx.)165 mm 231 m

9、m 328 mm (W/H/D) Mass (approx.)4.5 kg RadioFans.CN 收音机爱 好者资料库 (No.MB536)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 th

10、e 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- formed by qualified personnel only. (2) Alterations of the design or circuitry of the product should not be made. Any design alterat

11、ions of the product should 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 specia

12、l safety-related characteristics. 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 charact

13、eristics 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 the Parts List in the Service Manual. The use of a substitute replacement which does not have the same safety charac- teristics as the r

14、ecommended 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 with ties, clamps, tubings, barriers and the like to be separated from live parts, high temperature parts, moving parts and/or sharp e

15、dges 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 confirmed that they have been returned to normal, after reassem- bling. (5) Leakage shock hazard testing After reassembling the product, alway

16、s 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 be sure the product is safe to operate without danger of electrical shock.Do not use a line isolation transformer during this che

17、ck. 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, 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 exc

18、eed 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 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 go

19、od 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 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

20、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 designed and manufactured to meet international safety standards. (2) It is the legal responsibility of the repairer to ensure that the

21、se 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 replaced by approved parts. (5) If mains voltage selector is provided, check setting for local voltage. 1.3Caution Burrs formed durin

22、g 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 for safety In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the parts that ar

23、e 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 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 e

24、arth 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 1-4 (No.MB536) 1.5 Safety Precautions (U.K only) (1) This design of this product contains special hardware and many circuits and compone

25、nts 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. (2) Any unauthorised design alterations or additions will vo

26、id the manufacturers guarantee; furthermore the manufacturer cannot accept responsibility for personal injury or property damage resulting therefrom. (3) Essential safety critical components are identified by ( ) on the Parts List and by shading on the schematics, and must never be replaced by parts

27、 other than those listed in the manual. Please note however that many electrical and mechanical parts in the product have special safety related characteristics. These characteristics are often not evident from visual inspection. Parts other than specified by the manufacturer may not have the same s

28、afety characteristics as the recommended replacement parts shown 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 the like to be separated from live parts, high temperat

29、ure 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 confirmed that they have been returned to normal, after re-assembling. 1.5.1Warning (1) Service should b

30、e 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 must be made in accordance with the relevant saf

31、ety 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. Therefore, pay attention to such burrs in the case

32、 of preforming repair of this system. (No.MB536)1-5 1.6Preventing 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 p

33、erforming repairs. 1.6.1 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) Ground the workbench Gr

34、ound 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 the optical pickup

35、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 condition of the laser di

36、ode in the optical pickup. The testers internal power source can easily destroy the laser diode. 1.7Handling 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 cab

37、le 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 flexible cable caref

38、ully 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. 1.8Attention when traverse unit is decomposed *Please refer to Disassembly method in the text for the pickup unit. Apply solder to the short la

39、nd sections before the card wire is disconnected from the connecto on the servo board. (If the card 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 card wire.

40、 1M Conductive material (conductive sheet) or iron palate (caption) Anti-static wrist strap PickupconnectorCard wire Short land section 1-6 (No.MB536) 1.9Important for laser products 1.CLASS 1 LASER PRODUCT 2.CAUTION : (For U.S.A.) Visible and/or invisible class II laser radiation when open. Do not

41、stare into beam. (Others) Visible and/or invisible class 1M laser radiation when open. Do not view directly with optical instruments. 3.CAUTION : Visible and/or invisible laser radiation when open and inter lock failed or defeated. Avoid direct exposure to beam. 4.CAUTION : This laser product uses v

42、isible and/or 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 laser is able

43、 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 and PRINT ! Please use enough caution not to see the beam directly or touch it in case of an adjustme

44、nt or operation check. WARNING LABEL and PRINT (No.MB536)1-7 SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. 1-8 (No.MB536) SECTION 3 DISASSEMBLY 3.1Main Body 3.1.1Removing the side panel (See Fig.1 to 3) (1) Remove the one screw A attachi

45、ng the rear cover. (See Fig.1) (2) Remove the five screws B attaching the side panel and top cover. (See Fig.1) (3) Remove the two screws C attaching the front panel assem- bly. (See Fig.2) (4) Slide the both side panels in the direction of the arrow. (See Fig.3) Fig.1 Fig.2 Fig.3 B A B C (both side

46、) (No.MB536)1-9 3.1.2Removing the front panel assembly (See Fig.4) (1) Remove the two screws D attaching the front panel and top cover. (2) Disconnect the card wire of the switch board from the con- nector CN401 of the micon board. (3) Disengage the two hooks a then remove the front panel as- sembly

47、. Fig.4 3.1.3Removing the top cover (See Fig.5) (1) Disconnect the card wire from connector CN100. Fig.5 CN401 a a D a a D CN100 R R R 1-10 (No.MB536) 3.1.4Removing the tuner pack (See Fig.6, 7) (1) Disconnect the card wire of the tuner pack from connector CN405 of the micon board. (See Fig.6) (2) R

48、emove the two screws E attaching the tuner pack. (See Fig.7) 3.1.5Removing the micon board (See Fig.6 to 8) (1) Remove the two screws F attaching the micon board. (See Fig.7) (2) Disconnect the card wires from connectors CN400, CN406 of the micon board. (See Fig.6) (3) Disconnect the micon board fro

49、m the power amplifier board in the direction of the arrow while releasing the claw b, c of the connectors CN151, CN152 on the power amplifier board. (See Fig.8) (4) Remove the tow screws G attaching the micon board. (See Fig.6) 3.1.6Removing the power amplifier board (See Fig.7, 8) (1) Remove the two screws H attaching the power IC. (See Fig.7) (2) Remove the one screw J attaching the amplifier board. (See Fig.8) (3) Disconnect the power amplifier board from the trans board in the direction of the arrow while releasing the claw