Yamaha-GX500VCD-cs-sm 维修电路原理图.pdf

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1、GX-500/GX-500VCDGX-500/VCD100672SERVICE MANUALGX-500GX-500VCDMINI COMPONENT SYSTEMIMPORTANT NOTICEThis manual has been provided for the use of authorized YAMAHA Retailers and their service personnel.It has been assumed that basic service procedures inherent to the industry, and more specifically YAM

2、AHA Products, arealready known and understood by the users, and have therefore not been restated.WARNING:Failure to follow appropriate service and safety procedures when servicing this product may result inpersonal injury, destruction of expensive components, and failure of the product to perform as

3、 specified.For these reasons, we advise all YAMAHA product owners that any service required should be performedby an authorized YAMAHA Retailer or the appointed service representative.IMPORTANT:The presentation or sale of this manual to any individual or firm does not constitute authorization, certi

4、fica-tion or recognition of any applicable technical capabilities, or establish a principle-agent relationshipof any form.The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research, engineering, andservice departments of YAMAHA are continually str

5、iving to improve YAMAHA products. Modifications are, therefore,inevitable and specifications are subject to change without notice or obligation to retrofit. Should any discrepancy appear toexist, please contact the distributors Service Division.WARNING:Static discharges can destroy expensive compone

6、nts. Discharge any static electricity your body may haveaccumulated by grounding yourself to the ground buss in the unit (heavy gauge black wires connect to thisbuss).IMPORTANT:Turn the unit OFF during disassembly and part replacement. Recheck all work before you apply power to theunit.ICONTENTSTO S

7、ERVICE PERSONNEL .12GX-500 PANELS .34GX-500VCD PANELS .5SPECIFICATIONS .6INTERNAL VIEW .7DISASSEMBLY PROCEDURES .812VOLUME RANGE .13SYSTEM CONTROL CHECK .13TEST MODE .14SYSTEM TEST MODE.14RECEIVER TEST MODE .1516TAPE TEST MODE .16CD TEST MODE .17ALL FUNCTION TEST MODE.18CD ERROR MESSAGES .18CD STAND

8、ARD OPERATION CHART .1922ADJUSTMENTS .2325IC DATA .2632DISPLAY DATA .3334BLOCK DIAGRAM .3539PRINTED CIRCUIT BOARD .4062PIN CONNECTION DIAGRAM .63SCHEMATIC DIAGRAM .6471PARTS LIST .72103GREASE APPLICATION DIAGRAM.104105GX-500 REMOTE CONTROL TRANSMITTER .106GX-500VCD REMOTE CONTROL TRANSMITTER .107NX-

9、GX500.108、認定再生紙使用。This Service Manual uses recycled paper.GX-500 is composed of GX-500 and NX-GX500.GX-500VCD is composed of GX-500VCD and NX-GX500.RadioFans.CN 收音机爱 好者资料库GX-500/GX-500VCDGX-500/VCDITO SERVICE PERSONNEL1. Critical Components Information.Components having special characteristics are m

10、arked andmust be replaced with parts having specifications equal tothose originally installed.2. Leakage Current Measurement (For 120V Models Only).When service has been completed, it is imperative to verifythat all exposed conductive surfaces are properly insulatedfrom supply circuits.GMeter impeda

11、nce should be equivalent to 1500 ohm shuntedby 0.15F.PROTECTION OF EYES FROM LASER BEAM DURING SERVICINGThis set employs a laser. Therefore, be sure to carefully follow the instructions below when servicing .1. Laser Diode PropertiesGMaterial: GaAlAsGWavelength: 780 nmGEmission Duration : Continuous

12、GLaser Output: max. 44.6 W* This output is the value measured at a distance of about 200 mm from the objective lens surface on the OpticalPick-up Block.2. When checking the laser diode emission, keep your eyes more than 30 cm away from the objective lens.CAUTION : USE OF CONTROLS OR ADJUSTMENTS OR P

13、ERFORMANCE OF PROCEDURES OTHER THAN THOSESPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.THE COMPACT DISC PLAYER SHOULD NOT BE ADJUSTED OR REPAIRED BY ANYONE EXCEPT PROPERLYQUALIFIED SERVICE PERSONNEL.GLeakage current must not exceed 0.5mA.GBe sure to test for leakage with the AC plug in

14、 bothpolarities.WARNING: CHEMICAL CONTENT NOTICE!The solder used in the production of this product contains LEAD. In addition, other electrical/electronicand/or plastic (where applicable) components may also contain traces of chemicals found by theCalifornia Health and Welfare Agency (and possibly o

15、ther entities) to cause cancer and/or birth defectsor other reproductive harm.DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTHFOR ANY REASON WHATSOEVER!Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhalesolder fumes or expose

16、 eyes to solder/flux vapor!If you come in contact with solder or components located inside the enclosure of this product, washyour hands before handling food.1AC LEAKAGETESTER OREQUIVALENTEQUIPMENTUNDER TESTINSULATINGTABLEWALLOUTLET“CAUTION”“F201 : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPL

17、ACE ONLY WITH SAME TYPE 2.0A, 125V FUSE.”“F202 : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 4.0A, 125V FUSE.”CAUTIONF201 : REPLACE WITH SAME TYPE 2.0A, 125V FUSE.F202 : REPLACE WITH SAME TYPE 4.0A, 125V FUSE.ATTENTIONF201 : UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE

18、 DE 2.0A, 125V.F202 : UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE 4.0A, 125V.RadioFans.CN 收音机爱 好者资料库GX-500/GX-500VCDGX-500/VCDEnglishTHIS PRINTING (SEE POSITION SHOWN IN THE ILLUSTRATION) INFORMS THE USER THAT THE APPARATUSCONTAINS A LASER COMPONENT.THIS LABEL (SEE POSITION SHOWN IN THE ILLUSTRA

19、TION) WARNS THAT ANY FURTHER PROCEDURE WILLBRING THE USER INTO EXPOSURE WITH THE LASER BEAM.CAUTION : USE OF CONTROLS, ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSESPECIFIED HEREIN, MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.SwedishDENNA MRKNING (SE FIGUR) UPPLYSER OM ATT DET I APPARATEN

20、 INGR EN LASERKOMPONENT AVTYP KLASS 1.VARNINGSMRKNING (SE FIGUR) FR STRLNING. INGREPP I APPARATEN BR ENDAST FRETAGAS AVFACKMAN MED KNNEDOM OM LASER. APPARATEN INNEHLLER EN LASERKOMPONENT SOM AVGERSTRLNING VERSTIGANDE GRNSEN FR LASERKLASS 1.VARNING : OSYNLIG LASERSTRLNING NR DENNA DEL R PPNAD: BETRAK

21、TA EJ STRLEN.DanishDETTE MRKAT ER ANBRAGT SOM VIST I ILLUSTRATIONEN FOR AT ADVARE BRUGEREN OM AT AP-PARATET INDEHOLDER EN LASERKOMPONENT.DETTE MRKAT OM LASEREN ER ANBRAGT P APPARATET SOM EN OPLYSNING OM AT APPARATETINDEHOLDER ET LASERKOMPONENT.ADVARSEL : INDGREB BOR KUN FORETAGES AF EN FAGMAND DA DE

22、R ER RISIKO FOR RADIOAKTIVSTRLING.ADVARSEL : USYNLIG LASERSTRLING VED BNING.UNDG UDSAETTELSE FOR STRLING.FinnishVARO! :AVATTAESSA OLET ALTTIINA NKYMTTMLLE LASERSTEILYLLE. L KATSO STEESEEN.2q B, G, R, L, T modelsw B, G, R, L, T modelsGX-500/GX-500VCDGX-500/VCDIGX-500 PANELSM B, G modelsM U, C, R, A m

23、odels3200(7-7/8)320(12-5/8)GNX-GX500GX-500/GX-500VCDGX-500/VCDM A modelM U, C modelsM R modelM B, G models4GX-500/GX-500VCDGX-500/VCDM R, T modelsM L modelIGX-500VCD PANELS5200(7-7/8)320(12-5/8)GNX-GX500GX-500/GX-500VCDGX-500/VCDISPECIFICATIONSIAMPLIFIER SECTIONMinimum RMS Output Power per Channel1k

24、Hz, 0.9% THD, 6 .80W + 80W1kHz, 10% THD, 6 .100W + 100WInput Sensitivity/ImpedanceAUX/MD . 200mV/47kSpectrum Analyzed Band .5 band(100Hz, 350Hz, 1kHz, 3.5kHz, 10kHz)IVIDEO SECTION (GX-500VCD only)Signal Level .1Vp-p/75ITUNER SECTIONFM Tuning RangeU, C models . 87.5 to 107.9MHzR, T models . 87.5 to 1

25、08.0MHz/87.50 to 108.00MHzA, B, G, L model. 87.50 to 108.00MHzAM Tuning RangeU, C models . 530 to 1,710kHzR, T models .530 to 1,710kHz/531 to 1,611kHzA, B, G, L models . 531 to 1,611kHzFM Usable Sensitivity (75)30dB S/N Quieting, Mono, 1kHz,100% mod. R, U, C, L, T models .1.5V (14.8dBf)DIN Mono, S/N

26、 26dB (A, B, G only) .1.8VICD CHANGER SECTIONType . 3-Disc Carousel Auto-changerSignal Readout.Non-contact,3-beam semi-conductor laser pick-upD/A Converter. 1bit DACFilter .8-time oversampling digital filterWow & Flutter .UnmeasurableITAPE DECK SECTIONType . Auto Reverse4-Track 2-Channel playback/re

27、cording stereo Cassette DeckHeadsREC/PB. Hard permalloyErase. Double Gap FerriteMotorsMain . DC servo motorTray Loading . DC motorWow & FlutterW.PEAK . 0.19%W.RMS. 0.09%Frequency Response (20dB)Type I/Normal tape. 50 to 15,000Hz 3dBType II/High (CrO2) tape . 50 to 16,000Hz 3dBS/N RatioNR off.58dBDol

28、by B NR on.66dBISPEAKER SECTION (NX-GX500)Type . 3-Way Bass-reflex Design(Magnetic-Shielding Type)Speakers . 13cm (5-1/8”) woofer5cm (1-15/16”) tweeter2cm (13/16”) super tweeterFrequency Range. 60 to 20,000HzMaximum Input .240WImpedance . 6Sound Pressure Level .87dB/1m 2.45V (1W/6)IGENERALPower Supp

29、lyU, C models . AC120V, 60HzA model. AC240V, 50HzB, G, L models. AC230V, 50HzR, T models . AC110/120/220/240V, 60/50HzPower Consumption.140W (approx. 1W when set to the standby mode)Dimensions (W X H X D)GX-500. 280 X 320 X 364mm (11” X 12-5/8” X 14-5/16”)NX-GX500. 200 X 320 X 218mm (7-7/8” X 12-5/8

30、” X 8-9/16”)WeightGX-500. 10.5kg (23 lbs. 2 oz)NX-GX500.3.8kg (8 lbs. 6 oz)/eachAccessories . AM loop antenna X 1Indoor FM antenna X 1Remote Control Transmitter X 1Battery (size “AA”, R06) X 2Speaker Cord X 2* Specifications subject to change without notice.* Manufactured under license from Dolby La

31、boratories Li-censing Corporation. “DOLBY” and the double-D symbolV are trademarks of Dolby Laboratories Licensing Cor-poration.U .U.S.A. modelG . European modelC . Canadian modelR . General modelA .Australian modelL. Singapore modelB .British modelT.China model6343(13-1/2)12(1/2)9(3/8)364(14-5/16)1

32、00(3-15/16)172(6-3/4)280(11)320(12-5/8)GX-500/GX-500VCDGX-500/VCDIINTERNAL VIEWLeft sideTop sideq P.C.B. TUNERw P.C.B. MAIN (5)e P.C.B. MAIN (1)r P.C.B. INPUT (1)t P.C.B. MAIN (2)y P.C.B. MAIN (3)u P.C.B. MAIN (6)i DECK MECHANICAL UNITo GX-500 P.C.B. INPUT (3)GX-500VCD P.C.B. INPUT (2)!0 GX-500 CD M

33、ECHANICAL UNITGX-500VCD VCD MECHANICAL UNIT!1 GX-500 P.C.B. CDGX-500VCD P.C.B. VCD (1)!2 VCD MODULE (GX-500VCD only)!3 P.C.B. MAIN (4) (R, T only)7qwuerityyu!1!2q!3tri!0oGX-500/GX-500VCDGX-500/VCDIDISASSEMBLY PROCEDURES (Remove parts in the order as numbered.)Fig. 3Fig. 2Fig. 181. Removal of Top Cov

34、erRemove 11 screws ( q ) in Fig. 1.2. Removal of CD/VCD Mechanical Unita. Disconnect the power cord from the AC outlet.b. Push the Friction Arm ( the bottom side of the CD/VCD Mechanical Unit ) with the Ejecting Tool or a toollike as shown in Fig. 2.c. Pull the Tray forward approx. 5cm ( 2 ) and rem

35、ovethe CD Lid in Fig. 2.d. Push the Tray back to the original, closed position.e. Disconnect the Flat Connecting Cables ( CB9 ) andremove 3 connectors ( CB8 , CB7 and CB10 ) in Fig. 2f. Remove 4 screws ( w ) and then remove the CDMechanical Unit in Fig. 1.Ejecting Tool for CD Tray (TX946040)3. Remov

36、al of Panel Unita. Rotate the Loading Gear, then open the Tray andremove the Cassette Lid in Fig. 2.b. Push the Tray back to the original, closed position.c. Disconnect the flat connecting cables ( CB10, CB13and CB11 ) and remove a connector ( CB805 ) in Fig.2.d. Remove 6 screws ( e and r ) and then

37、 remove thePanel Unit in Fig. 1.4. Removal of Deck Mechanical Unita. Remove 4 screws ( t ) and then remove the DeckMechanical Unit in Fig. 3.b. Remove 3 connectors ( W2, W3 and W4 ) in Fig. 3.FRONTFrictionArmqqqqTop CoverPanel UnitCD/VCD Mechanical UnitqwweewreCB9CB8CB7CD LidCB10(GX-500VCD only)CB13

38、CB805CB11(GX-500VCD only)CB10Cassette LidLoading GearttttDeck Mechanical UnitW3W2W4GX-500/GX-500VCDGX-500/VCD9Fig. 4Fig. 55. Operation Check of P.C.B. CD/VCDa. Remove the CD Mechanical Unit.b. Remove 4 screws ( y ) and then remove the P.C.B. CD/VCD in Fig. 4.c. Place blocks (at 3 locations) to hold

39、the CD Mechanical Unit horizontally asshown in the Fig. 5.d. Connect the Flat Connecting Cable ( CB9 ) and 3 connectors ( CB8, CB7and CB10 ) in Fig. 4 and Fig. 5.e. Connect the power plug and turn on the Power Switch.yVCD Module(GX-500VCD only)CB9CB8CB7CB10P.C.B. CD/VCDBlockBlockP.C.B. CD/VCDBlockGX

40、-500/GX-500VCDGX-500/VCDFig. 7Fig. 6Fig. 86. Operation Check of P.C.B. Main (1)a. Remove the CD Mechanical Unit.b. Remove the Panel Unit.c. Remove the Deck Mechanical Unit.d. Remove 5 screws ( u ) in Fig. 6.e. Remove 1 screw ( i ) and then remove the P.C.B. Main (2) in Fig. 7.f. Remove 3 screws ( o

41、) in Fig. 7.g. Remove 4 screws ( !0 ) and then remove the Power Transformer in Fig. 8.h. Place the main unit on its left side (viewed from the front) and remove the Bottom Cover in Fig. 9.i. Install the Panel unit to the main unit in Fig. 9.j. Connect the flat connecting cables ( CB10, CB13 and CB11

42、 ) and remove a connector ( CB805 ) in Fig. 2.k. Connect the power plug and turn on the Power Switch.Fig. 910uuuioP.C.B. Main (2)!0!0P.C.B. InputP.C.B. Main (1)CAUTIONWhen the power to this equipment is turned on with the CD/VCD Mechanical Unit disconnected, the capacitor C255(4700/16) of the Main P

43、.C.B. (CD/VCD power supply section) is charged. Connecting the CD/VCD P.C.B. in this state may causedamage to its IC. Therefore, when installing the CD/VCD Mechanical Unit, be sure to discharge the capacitor C255(4700/16) of the Main P.C.B. before making connections. (To discharge it, short the W201

44、 terminal +B and GND with aresistor(270 1W).)GX-500/GX-500VCDGX-500/VCD7. Removal of Tray & Traverse Unita. Remove 4 screws ( !1 ) and then remove the Clamp Bracket in Fig. 10.b. Remove 2 screws ( !2 ) and then remove the Tray Brackets in Fig. 10.c. Push the Friction Arm ( the bottom side of the CD

45、Mechanical Unit ) with a screwdriver or the like and pull out the Trayforward as in Fig. 10.d. Remove 4 screws ( !3 ) and take out the Slider in Fig. 11.e. Disconnect the Flat Connecting Cable ( 16P ) and connectors ( 6P ).f. Remove the Traverse Unit in Fig. 11.!1!1CD Mechanical UnitFrictionArmClamp

46、 BracketFig. 11GPrecaution for Installation of TrayBe sure to fit the shaft of the Friction Gear intothe groove in the Tray.GInstallation of Traverse Unit & Slidera. Fit the Traverse Unit into the Chassis.b. Turn the Cam Gear until its Guide Pin comes to theposition as shown in Fig. 11.c. Fit the Sl

47、ider into the Traverse Unit. Set the Spring ofthe Slider so that it holds down the Guide Pin of theCam Gear (as shown in Fig. B).(Press the Spring of the Slider once and release it,and it will hold down the Guide Pin of the Cam Gear.)d. After installation, check that the Clamp moves up anddown by tu

48、rning the Load Gear.Fig. BTrayTray Bracket!2SpringSpringSpringLoad GearFRONTGrooveGuide PinOKNGTrayBracketFrictiongearShaftTraySliderTraverseUnitGuidePinCam GearFig. 10!3no markingside!3Guide PinCam GearTraverseUnitSpringSliderFig. A11GX-500/GX-500VCDGX-500/VCDFig. 14Disc Table19.4mmFig. CPick-up He

49、adGear ASled ShaftSled ShaftStopperFig. 129. Removal of Cassette MechanismRemove 4 screws ( !4 ) and then pull out the CassetteMechanism in Fig. 13.10.Removal of Main MotorRemove 2 screws ( !5 ) in Fig. 13.11.Removal of Pinch RollerDetach the hook and then remove the Pinch Rollerin Fig. 14.12.Remova

50、l of Head Assya. Remove 1 screw ( !6 ) and then remove the RelayP.C.B. in Fig. 14.b. Remove 2 screws ( !7 ) and then remove the HeadAssy in Fig. 14.*Perform the adjustment of azimuth after installingthe Head Assy.8. Removal of Pick-up Heada. Remove the Gear A in Fig. 12.b. Pull out the Sled Shaft an