Yamaha-GX707-cs-sm 维修电路原理图.pdf

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1、GX-707/GX-707VCDGX-707/VCD100713SERVICE MANUALGX-707GX-707VCDMINI 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-707 PANELS . 34GX-707VCD 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 S

8、TANDARD OPERATION CHART . 1920ADJUSTMENTS . 2123IC DATA . 2430DISPLAY DATA . 3132BLOCK DIAGRAM . 3337PRINTED CIRCUIT BOARD . 3862PIN CONNECTION DIAGRAM .63SCHEMATIC DIAGRAM . 6472PARTS LIST . 73108GX-707 REMOTE CONTROL TRANSMITTER .109GX-707VCD REMOTE CONTROL TRANSMITTER .110GX-707 is composed of GX

9、-707 (main unit) and NX-P707 (speakers).GX-707VCD is composed of GX-707VCD (main unit) and NX-P707 (speakers).NX-P707 is composed of NX-GX505, NX-C707 and NX-E707.The NX-C707 and NX-E707 loudspeakers are not field serviceable and must be replaced as complete units.RadioFans.CN 收音机爱 好者资料库GX-707/GX-70

10、7VCDGX-707/VCDITO SERVICE PERSONNEL1. Critical Components Information.Components having special characteristics are marked Zand must be replaced with parts having specifications equalto those originally installed.2. Leakage Current Measurement (For 120V Models Only).When service has been completed,

11、it is imperative to verifythat all exposed conductive surfaces are properly insulatedfrom supply circuits.GMeter impedance should be equivalent to 1500 ohm shuntedby 0.15F.GLeakage current must not exceed 0.5mA.GBe sure to test for leakage with the AC plug in bothpolarities.1AC LEAKAGETESTER OREQUIV

12、ALENTEQUIPMENTUNDER TESTINSULATINGTABLEWALLOUTLET“CAUTION”“F201 : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE 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,

13、 125V FUSE.F202 : REPLACE WITH SAME TYPE 4.0A, 125V FUSE.ATTENTIONF201 : UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE 2.0A, 125V.F202 : UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE 4.0A, 125V.WARNING: Laser SafetyThis product contains a laser beam component. This component may emit invisible,

14、as well as visible radiation,which may cause eye damage. To protect your eyes and skin from laser radiation, the following precautions mustbe used during servicing of the unit.1) When testing and/or repairing any component within the product, keep your eyes and skin more than 30 cm away fromthe lase

15、r pick-up unit at all times. Do not stare at the laser beam at any time.2) Do not attempt readjustment, disassembly or repair of the laser pick-up, unless noted elsewhere in this manual.3) CAUTION : Use of controls, adjustments or performance of procedures other than those specified herein may resul

16、t inhazardous radiation exposure.WARNING: CHEMICAL CONTENT NOTICE!The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and/orplastic (where applicable) components may also contain traces of chemicals found by the California Health andWelfare Agenc

17、y (and possibly other entities) to cause cancer and/or birth defects or other reproductive harm.DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FORANY REASON WHATSOEVER!Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale sol

18、der fumesor expose eyes to solder/flux vapor!If you come in contact with solder or components located inside the enclosure of this product, wash your handsbefore handling food.RadioFans.CN 收音机爱 好者资料库GX-707/GX-707VCDGX-707/VCD2Laser Emitting conditions:1) When the Top Cover is removed, and the STANDB

19、Y SW is turned to the ON position, the laser component will emita beam for several seconds to detect if a disc is present. During this time (5-10 sec.) the laser may radiate through thelens of the laser pick-up unit. Do not attempt any servicing during this period!If no disc is detected, the laser w

20、ill stop emitting the beam. When a disc is set, you will not be exposed to any laseremissions.2) The laser power level can be adjusted with the VR on the pick-up PWB, however, this level has been set by the factoryprior to shipping from the factory. Do not adjust this laser level control unless inst

21、ruction is provided elsewhere in thismanual. Adjustment of this control can increase the laser emission level from the device.Laser Diode PropertiesMaterial: GaAlAsWavelength: 780 nmEmission duration: ContinuousLaser output: Max. 44.6W*ANSI Class: Class 1* This output is the value measured at a dist

22、ance of about200 mm from the objective lens surface on the Optical Pick-up Block.VARO!: AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALTTIINA NKYMTTMLLELASER-STEILYLLE. L KATSO STEESEEN.VARNING! : OSYNLIG LASERSTRLNING NR DENNA DEL R PPNAD OCH SPRREN R URKOPPLAD.BETRAKTA EJ STRLEN.B, G, R, L, T mode

23、lsB, G, R, L, T modelsVariable resistor(Do not turn)Optical pick-upGX-707/GX-707VCDGX-707/VCDIGX-707 PANELSM B, G modelsM U, C, R, A models3GX-707/GX-707VCDGX-707/VCDM A modelM U, C modelsM R modelM B, G models4GX-707/GX-707VCDGX-707/VCDM R, T modelsM L modelIGX-707VCD PANELS5GX-707/GX-707VCDGX-707/

24、VCDISPECIFICATIONSIAMPLIFIER SECTIONMinimum RMS Output Power per ChannelFRONT, 1kHz, 0.9% THD, 6 .80W + 80WFRONT, 1kHz, 10% THD, 6 .100W + 100WCENTER, 1kHz, 0.9% THD, 6.80WCENTER, 1kHz, 10% THD, 6.100WREAR, 1kHz, 0.9% THD, 6.25WREAR, 1kHz, 10% THD, 6.30WInput Sensitivity/ImpedanceAUX/MD . 200mV/47kS

25、pectrum Analyzed Band .5 band(100Hz, 350Hz, 1kHz, 3.5kHz, 10kHz)IVIDEO SECTION (GX-707VCD only)Signal Level .1Vp-p/75ITUNER SECTIONFM Tuning RangeU, C models . 87.5 to 107.9MHzR, T models . 87.5 to 108.0MHz/87.50 to 108.00MHzA, B, G, L models . 87.50 to 108.00MHzAM Tuning RangeU, C models . 530 to 1

26、,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 26dB (A, B, G only) .1.8VICD CHANGER SECTIONType . 3-Disc Carousel Auto-changerSignal Readout.Non-

27、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/recording stereo Cassette DeckHeadsREC/PB. Hard permalloyErase. Double Gap FerriteMotorsMain . DC ser

28、vo 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.58dBDolby B NR on.66dBIFRONT SPEAKER SECTION (NX-GX505)Type . 3way Bass ReflexMagnetic Shielding TypeSpeak

29、ers . 13cm (5-1/8”) Cone Type (Woofer)5cm (1-15/16”) Cone Type (Tweeter)2cm (13/16”) Piezo Type (Super Tweeter)Frequency Range. 60Hz to 27kHzNominal Input .100WMaximum Input .220WImpedance . 6Sensitivity . 90dB/2.83V, 1mCrossover Frequecy . 3kHzICENTER SPEAKER SECTION (NX-C707)Type . Full Range Acou

30、stic SustensionMagnetic Shielding TypeSpeakers . 8cm (3-1/8”) Cone Type X 2Frequency Range. 90Hz to 25kHzNominal Input.100WMaximum Input .180WImpedance . 6Sensitivity . 87dB/2.83V, 1mIREAR SPEAKER SECTION (NX-E707)Type . Full Range Acoustic SustensionMagnetic Shielding TypeSpeakers . 8cm (3-1/8”) Co

31、ne TypeFrequency Range. 100 to 20,000HzMaximum Input .100WImpedance . 12Sensitivity . 84dB/2.83V, 1mIGENERALPower SupplyU, C models . AC120V, 60HzA model. AC240V, 50HzB, G, L models. AC230V, 50HzR, T models . AC110/120/220/240V, 60/50HzPower Consumption.170W (approx. 1.3W when set to the standby mod

32、e)Dimensions (W X H X D)GX-707/GX-707VCD. 280 X 320 X 365mm (11” X 12-5/8” X 14-3/8”)NX-GX505. 200 X 320 X 208mm (7-7/8” X 12-5/8” X 8-3/16”)NX-C707 . 280 X 100 X 188mm (11-7/16” X 3-15/16” X 7-3/8”)NX-E707. 94 X 117 X 108mm (3-11/16” X 4-5/8” X 4-1/4”)WeightGX-707/GX-707VCD. 10.5kg (23 lbs. 2 oz)NX

33、-GX505.3.8kg (8 lbs. 6 oz)/eachNX-C707 . 2.0kg (4 lbs. 6 oz)NX-E707.0.7kg (1 lbs. 8 oz)/eachFinishGX-707/GX-707VCD. Black colorNX-GX505. Black colorNX-C707 . Black colorNX-E707. Black colorAccessories . AM loop antenna X 1Indoor FM antenna X 1Remote Control Transmitter X 1Battery (size “AA”, R06) X

34、2Speaker Cord (5m x 3, 10m x 2)Screws (Rear) X 2Velcro Strips (Center) X 4Mounting Brackets (Rear) X 2* Specifications subject to change without notice.* Manufactured under license from Dolby Laboratories LicensingCorporation. “DOLBY”, “PRO LOGIC”, and the double-D symbolV are trademarks of Dolby La

35、boratories Licensing Corporation.U . U.S.A. modelG . European modelC . Canadian modelR .General modelA . Australian modelL. Singapore modelB . British modelT. China model6GX-707/GX-707VCDGX-707/VCDIINTERNAL VIEWLeft sideTop sideq TUNER P.C.B.w EFFECT P.C.B. (2)e MAIN P.C.B. (5)r EFFECT P.C.B. (1)t M

36、AIN P.C.B. (1)y INPUT P.C.B. (1)u OPERATION P.C.B. (3)(GX-707VCD only)i FANo MAIN P.C.B. (2)!0 MAIN P.C.B. (3)!1 MAIN P.C.B. (6)!2 DECK MECHANICAL UNIT!3 GX-707 CD MECHANICAL UNITGX-707VCD VCD MECHANICAL UNIT!4 GX-707 CD P.C.B.GX-707VCD VCD P.C.B.!5 VCD MODULE (GX-707VCD only)7!0!1!4!5oy!2!3iqqwe!1t

37、yr!2o!0iu(with CD/VCD Mechanical Unit removed)GX-707/GX-707VCDGX-707/VCDIDISASSEMBLY PROCEDURES (Remove parts in the order as numbered.)Fig. 381. Removal of Top CoverRemove 11 screws ( q ) in Fig. 1.2. Removal of CD/VCD Mechanical Unita. Disconnect the power cord from the AC outlet.b. Push the Frict

38、ion Arm ( the bottom side of the CD/VCD Mechanical Unit ) with a finger as shown in Fig.2.c. Pull the Tray forward approx. 5cm ( 2 ) and removethe CD Lid in Fig. 2.d. Push the Tray back to the original, closed position.e. Disconnect the Flat Connecting Cables ( CB10 ) on theCD/VCD P.C.B. and remove

39、3 connectors ( CB11 ,CB12 and CB9 ) on the CD/VCD P.C.B. in Fig. 2f. Remove 4 screws ( w ) and then remove the CDMechanical Unit in Fig. 1.3. Removal 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 positio

40、n.c. Disconnect the flat connecting cables ( CB10, CB13and CB11 ) on the INPUT P.C.B. and remove aconnector ( CB805 ) in Fig. 2.d. Remove 5 screws ( e ) and 2 screws ( r ), and thenremove the Panel Unit in Fig. 1 and Fig. 2.4. Removal of Deck Mechanical Unita. Remove 4 screws ( t ) and then remove t

41、he DeckMechanical Unit in Fig. 3.b. Remove 3 connectors ( W2, W3 and W4 ) in Fig. 3.ttttDeck Mechanical UnitW3W2W4Fig. 1qqqqTop CoverPanel UnitCD/VCD Mechanical UnitqwweewreFRONTFrictionArmFig. 2CB12(VCD only)CB11CB9CD LidCB13CB805CB11(VCD only)CB10Cassette LidLoading GearCB10rCD/VCD P.C.B.INPUT P.C

42、.B.GX-707/GX-707VCDGX-707/VCD95. Operation Check of CD/VCD P.C.B.a. Remove the CD Mechanical Unit.b. Remove 5 screws ( y ) and then remove the CD/VCD P.C.B. in Fig. 4.c. Place blocks (at 3 locations) to hold the CD Mechanical Unit horizontally asshown in the Fig. 5.d. Connect the Flat Connecting Cab

43、le ( CB10 ) and 3 connectors ( CB11,CB12 and CB9 ) in Fig. 4 and Fig. 5.e. Fit insulating material (thick paper, etc.)to prevent the chassis fromcontacting the CD/VCD P.C.B.f. Connect the power plug and turn on the Power Switch.Fig. 4Fig. 5yVCD Module(GX-707VCD only)CB11CB12 (VCD only)CB10CD/VCD P.C

44、.B.BlockBlockCD/VCD P.C.B.BlockCB9yyyyGX-707/GX-707VCDGX-707/VCDFig. 7Fig. 6Fig. 86. Operation Check of Main P.C.B. (1)a. Remove the CD Mechanical Unit.b. Remove the Panel Unit.c. Remove the Deck Mechanical Unit.d. Remove 4 screws ( u ) and then remove the Fan in Fig. 6.e. Remove 5 screws ( i ) in F

45、ig. 6.f. Remove 1 screw ( o ) and then remove the P.C.B. Main (2) in Fig. 7.g. Remove 3 screws ( !0 ) in Fig. 7.h. Remove 4 screws ( !1 ) and then remove the Power Transformer in Fig. 8.i. Place the main unit on its left side (viewed from the front) and remove the Bottom Cover in Fig. 9.j. Install t

46、he Panel unit to the main unit in Fig. 9.k. Connect the flat connecting cables ( CB10, CB13 and CB11 ) and remove a connector ( CB805 ) in Fig. 2.l. Connect the power plug and turn on the Power Switch.Fig. 910iiio!0Main P.C.B. (2)!1!1Input P.C.B.Main P.C.B. (1)uCAUTIONWhen the power to this equipmen

47、t is turned on with the CD/VCD Mechanical Unit disconnected, the capacitor C255(4700/16) of the Main P.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

48、capacitor C255(4700/16) of the Main P.C.B. before making connections. (To discharge it, short the W201 terminal +B and GND with aresistor(270 1W).)GX-707/GX-707VCDGX-707/VCD117. Removal of Tray & Traverse Unita. Remove 2 screws ( !2 ) and then remove the Clamper Bracket in Fig. 10.b. Remove 1 screw

49、( !3 ) and then remove the Lever Switch in Fig. 10.c. Disconnect the Flat Connecting Cable ( 9P ) in Fig. 10.d. Push the Friction Arm ( the bottom side of the CD Mechanical Unit ) with a screwdriver or the like and pull out the Trayforward as in Fig. 10.e. Unhook 1 Tray hook in Fig. 11 and pull out

50、the Tray.f. Remove 4 screws ( !4 and !5 ) in Fig. 12.g. Disconnect the Flat Connecting Cable ( 16P ) and connectors ( 6P ).h. Take out the Traverse Unit with the Slider Cam and the TU Holder in Fig. 12.i. Remove 2 screws ( !6 ) and then remove the TU Holder in Fig. 12.Fig. 11Fig. 10Fig. 12FrictionAr