JVC-UXGD6-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.MB408 2005/6 MICRO COMPONENT SYSTEM MB40820056 UX-GD6S,UX-GD6M 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31 5TROUBLESHOOTING . . . . . . . . . . . . .

4、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-35 SUPER VIDEO CA-UXGD6SCA-UXGD6MSP-UXGD6SSP-UXGD6SSP-UXGD6MSP-UXGD6M Area suffix A - Australia US - Singapore UT - Taiwan UW - Brazil,Mexico,Peru UX - Saudi Arabia UG - Turkey,South Africa,Egyp

5、t UN - Asean UX-GD6S Area suffix UX-GD6M UB - Hong Kong UF - China UP - Korea UT - Taiwan UG - Turkey,South Africa,Egypt RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB408) SPECIFICATION CA-UXGD6S (for UX-GD6S)/CA-UXGD6M (for UX-GD6M) Speakers-SP-UXGD6S (for UX-GD6S) Speakers-SP-UXGD6M (for UX-GD6M) Designs & sp

6、ecifications are subject to change without notice. Amplifier sectionOutput Power100 W (50 W + 50 W) at 6 (10% THD) Audio Input AUX400 mV/50 k (at AUX LVL1) 200 mV/50 k (at AUX LVL2) Digital outputDVD OPTICAL DIGITAL OUT: -21 dBm to -15 dBm (660 nm 30 nm) Video outputColor system: NTSC or PAL (interl

7、aced/progressive) VIDEO (composite)1 V(p-p)/75 S-VIDEOY (luminance): 1 V(p-p)/75 C (chrominance, burst): NTSC: 0.286 V(p-p)/75, PAL: 0.3 V(p-p)/75 COMPONENT(Y): 1 V(p-p)/75 (PB/PR): 0.7 V(p-p)/75 Speaker impedance6 - 16 Tuner sectionFM tuning range87.50 MHz - 108.00 MHz AM (MW) tuning range 531 kHz

8、- 1 710 kHz (at 9 kHz intervals) 530 kHz - 1 710 kHz (at 10 kHz intervals) For Saudi Arabia only 531 kHz - 1 602 kHz (at 9 kHz intervals) 530 kHz - 1 600 kHz (at 10 kHz intervals) Tape sectionFrequency response60 Hz - 14 000 Hz Wow and flutter0.15 % (WRMS) Disc player section Region codesMiddle East

9、: 2 South East Asia: 3 Central and South America: 4 Playable discDVD Video/DVD Audio CD/VCD/SVCD CD-R/CD-RW (CD/SVCD/VCD/MP3/JPEG format) DVD-R (DVD Video format) DVD-RW/DVD-ROM/DVD-RAM (DVD-VR format) Dynamic range80 dB Horizontal resolution500 lines Wow and flutterImmeasurable GeneralPower require

10、mentAC 110 V/AC 127V/AC 220 V - AC 230 V (adjustable with the voltage selector), 50 Hz/60 Hz Power consumption95 W (at operation) 4 W (on standby) Dimensions (approx.)170 mm 240 mm 361 mm (W/H/D) Mass (approx.)5.6 kg Speaker units Tweeter 4 cm cone 1 Woofer13.5 cm cone 1 Impedance6 Dimensions (appro

11、x.)165 mm 283.5 mm 249 mm (W/H/D) Mass (approx.)2.8 kg each Speaker units Tweeter 4 cm cone 1 Woofer12 cm cone 1 Impedance6 Dimensions (approx.)145 mm 240 mm 201 mm (W/H/D) Mass (approx.)2.2 kg each RadioFans.CN 收音机爱 好者资料库 (No.MB408)1-3 SECTION 1 PRECAUTION 1.1Safety Precautions (1) This design of t

12、his 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 those used in the original circu

13、its. 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 warranty and will further relieve t

14、he 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 can the protection afforded by t

15、hem 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 are identified by shading on the

16、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 hazards. (4) The leads in the produ

17、cts 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 routing and dress should be observed

18、, 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 cabinet, screw heads, headphone

19、 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 current from each exposed metal

20、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 voltmeter having, 1,000 per volt

21、 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 connection to each exposed metal part,

22、 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 0.5 mA AC (r.m.s.). 1.2Warning (1

23、) 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 standards. (4) It is essential that saf

24、ety 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 of pre- forming repair of this

25、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 are critical for safety. When re

26、placing 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 sensitivity) 1500 10W 0.15 F AC TYPE

27、 RadioFans.CN 收音机爱 好者资料库 1-4 (No.MB408) 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 prevent this when performing re

28、pairs. 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) Ground the workbench Ground the wor

29、kbench 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 In order to

30、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 diode in the o

31、ptical 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 of the flexible cable using nip

32、pers, 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 carefully as it m

33、ay 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 solder to the short land sections

34、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 after connecting the flexible wire.

35、 1M Conductive material (conductive sheet) or iron palate (caption) Anti-static wrist strap Short land section Connector Traverse mechanism assembly DVD pickup Card wire (No.MB408)1-5 1.8Important for laser products 1.CLASS 1 LASER PRODUCT 2.DANGER : Invisible laser radiation when open and inter loc

36、k 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 and is equipped with safet

37、y 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, adjustments or performa

38、nce 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 : Synlig och osynling laserstrln

39、ing 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 er ben eller interlocken

40、 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 defeated. AVOID DIRECT EXPOSUR

41、E 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) ADVARSEL : Synlig og us

42、ynlig laserstrling nr maskinen er ben eller interlocken fejeler. Undg direkte eksponering til strling. (d) WARNING LABEL 1-6 (No.MB408) SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. (No.MB408)1-7 SECTION 3 DISASSEMBLY 3.1Main body sectio

43、n 3.1.1Removing the metal cover (See Figs.1 to 3) (1) From the back side of the main body, remove the six screws A attaching the metal cover. (See Fig.1.) (2) From the both sides of the main body, remove the two screws B attaching the metal cover. (See Figs.2 and 3.) (3) From the top sides of the ma

44、in body, remove the two screws B attaching the metal cover. (See Figs.2 and 3.) (4) Remove the metal cover in the direction of the arrow while extending the lower sections of the metal cover. (See Figs.2 and 3.) Reference: Remove the microphone volume knob from the top side of the metal cover at the

45、 same time. Fig.1 Fig.2 Fig.3 Metal cover AA AA Metal cover B B Metal cover B B Microphone volume knob 1-8 (No.MB408) 3.1.2Removing the front panel assembly (See Figs.4 to 6) Remove the metal cover. (1) From the bottom side of the main body, remove the two screws C attaching the front panel assembly

46、. (See Fig.4.) (2) From the right side of the main body, push the slide cam and pull the tray assembly out of the main body in the di- rection of the arrow 1. (See Fig.5.) (3) Remove the tray fitting from the tray assembly in the direc- tion of the arrow 2 and push the tray assembly in the main body

47、. (See Fig.5.) (4) Release the claws a and claws b and remove the front pan- el assembly toward the front. (See Figs.4 to 6.) (5) Disconnect the card wire from the connector CN730 on the micom board. (See Fig.6.) Fig.4 Fig.5 Fig.6 Front panel assembly C C a a 1 2 Front panel assembly Tray assembly T

48、ray fitting Slide cam b Micom board CN730 b (No.MB408)1-9 3.1.3Removing the rear cover (See Fig.7) Remove the metal cover. (1) From the back side of the main body, remove the screw D attaching the rear cover. (2) Release the joint sections c and remove the rear cover. Fig.7 D c Rear cover c 1-10 (No.MB408) 3.1.4Removing the cassette chassis assembly (See Figs.8 to 10) Remove the metal cover and rear cover. (1) Remove the two screws E attaching the cassette chassis assembly. (See Fig.8.) (2) From the both sides of the main body