Yamaha-CRXM170-rec-sm 维修电路原理图.pdf

100975SERVICE MANUALCRX-M170IMPORTANT NOTICEThis manual has been provided for the use of authorized YAMAHA Retailers and their service personnel.It has been assumed that basic service procedures inherant to the industry, and more specifically YAMAHA Products, are alreadyknown 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 in personalinjury, destruction of expensive components and failure of the product to perform as specified. For these reasons,we advise all YAMAHA product owners that all service required should be performed by an authorizedYAMAHA Retailer or the appointed service representative.IMPORTANT:The presentation or sale of this manual to any individual or firm does not constitute authorization, certification orrecognition of any applicable technical capabilities, or establish a principle-agent relationship of 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 striving to improve YAMAHA products. Modifications are, therefore, inevitableand specifications are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist, please contactthe distributors Service Division.WARNING:Static discharges can destroy expensive components. Discharge any static electricity your body may have accumu-lated by grounding yourself to the ground buss in the unit (heavy gauge black wires connect to this buss).IMPORTANT:Turn the unit OFF during disassembly and parts replacement. Recheck all work before you apply power to the unit.MAINTENANCE FLOW CHART (TUNER) .9WIRING DIAGRAM .10PRINTED CIRCUIT BOARD .1113BLOCK DIAGRAM.14SCHEMATIC DIAGRAM.1517REMOTE CONTROL .19PARTS LIST.2021I CONTENTSTO SERVICE PERSONNEL .23PREVENTION OF ELECTRO STATIC DISCHARGE.4REAR PANEL .4SPECIFICATIONS.5INTERNAL VIEW .6DISASSEMBLY PROCEDURES .68MAINTENANCE FLOW CHART (CD) .9CD/DAB RECEIVERCRX-M170STANDBY/ON1234567890BANDPRESETTUNERTIMERDIMMERSLEEPFUNCTION/ FM MODEINFO/TEXT AUTO TUNEENTERAUX 2AUX 1TAPECDREPEATA-BPROGCLEARRANDOMTIMEMUTEVOLUME+ 2005 YAMAHA CORPORATION. All rights reseved.This manual is copyrighted by YAMAHA and may not be copied orredistributed either in print or electronically without permission. 05.09RadioFans.CN 收音机爱 好者资料库CRX-M1702CRX-M170I TO SERVICE PERSONNELWARNING: 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 Agency (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 solder 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.WARNING: Laser SafetyThis product contains a laser beam component. This component may emit invisible, 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 laser pick-up unit at all times. Do not stare at the laser beam at any time.2) Do not attempt to readjust, disassemble or repair 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 result inhazardous radiation exposure.About Lead Free SolderThe P.C.B.s installed in this unit are soldered using the following solder.SIDE ASIDE BMAIN P.C.B.Lead Free SolderLead Free SolderPOWER P.C.B.Lead Free SolderSide ASide BSMT REFLOW ProcessMI FLOW ProcessSolder DipAmong some types of lead free solder currently available, it is recommended to use one of the following types for the repairwork. Sn + Ag + Cu (tin + silver + copper) Sn + Cu (tin + copper) Sn + Zn + Bi (tin + zinc + bismuth)Caution:1. As the melting point temperature of the lead free solder is about 30C to 40C (50F to 70F) higher than that of the leadsolder, be sure to use a soldering iron suitable to each solder.2. If lead solder must be used, be sure to remove lead free solder from each terminal section of the parts to be replaced and fromthe area around it completely before soldering, or make sure that the lead free solder and lead solder melt together fully.RadioFans.CN 收音机爱 好者资料库CRX-M170CRX-M1703Laser Emitting conditions:1) When the Top Cover is removed, and the “STANDBY/ON” SW is turned to the ON position, the laser component willemit a beam for several seconds to detect if a disc is present. During this time (5-10 sec.) the laser may radiate throughthe lens of the laser pick-up unit. Do not attempt any servicing during this period!If no disc is detected, the laser will 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 instruction is provided elsewhere in thismanual. Adjustment of this control can increase the laser emission level from the device.Laser Diode PropertiesGMaterial: GaAlAsGWavelength: 789 nmGEmission Duration : ContinuousGLaser Output: max. 44.6 W* This output is the value measured at a distance of about200 mm from the objective lens surface on the OpticalPick-up Block.When checking the laser diode emission, keep your eyes morethan 30 cm away from the objective lens.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.Optical Pick-upADVARSEL - USYNLIG LASERSTRLING VED BNING, NR SIKKERHEDSAFBRYDERE ER UDE AF FUNKTION. UNDG UDSTTELSE FOR STRKING.VAROITUS! - SUOJAKOTEL OA EI SAA AVATA. LAITE SISLT LASERDIODIN, JOKA LHETT (NKYM TNT) SILMILLE VAARALLISTA LASERSTEILY.ADVARSEL - USYNLING LASERBESTRLING NR DENNE DELEN ER PEN OG SIKKERHETSSPERREN ER UTKOBLET. UNNG UTSETTELSE FOR STRLING.CAUTION - INVISIBLE LASER RADIATION WHEN OPEN AND INTERLOCKS DEFEATED, AVOID EXPOSURE TO BEAM.VORSICHT! UNSICHTBARE LASERSTRAHLUNG TRITT AUS, WENN DECKEL GEFFNET UND WENN SICHERHEITSVER- RIEGELUNG BERBRCKT IST . NICHT DEM STRAHL AUSSETZEN!.VARNING - OSYNLING LASERSTRLNING NR DENNA DEL R PPNAD OCH SPRR R URKOPPLAD. STRLEN R FARLIG.MODEL NO. RDX-E700CLASS 1 LASER PRODUCTLASER KLASSE 1 PRODUKTLUOKAN 1 LASERLAITEKLASS 1 LASER APPARAT PRODUIT LASER DE CLASSE 1CRX-M1704CRX-M170I PREVENTION OF ELECTRO STATIC DISCHARGESome semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called ElectrostaticallySensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and semiconductor “chip”components. The following techniques should be used to help reduce the incidence of component damage caused by electro static discharge(ESD).1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any ESD on your body by touchinga known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap, which should be removed forpotential shock reasons prior to applying power to the unit under test.2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, to preventelectrostatic charge buildup or exposure of the assembly.3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.4. Use only an anti-static solder removal device. Some solder removal devices not classified as “anti-static (ESD protected)” can generateelectrical charge sufficient to damage ES devices.5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most replacement ESdevices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparable conductive material).7. Immediately before removing the protective material from the leads of a replacement ES divice, touch the protective material to the chassis orcircuit assembly into which the device will be installed.CAUTION: Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the brushing together ofyour clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD) sufficient to damage an ES device).Grounding for electrostatic breakdown prevention1.Human body grounding.Use the antistatic wrist strap to discharge the staticelectricity from your body.2.Work table grounding.Put a conductive material (sheet) or steel sheet on the areawhere the optical pickup is placed and ground the sheet.Caution:The static electricity of your clothes will not be groundedthrough the wrist strap. So take care not to let your clothestouch the optical pickup.1M-ohmsConductive material(sheet) or steel sheetAnti-static wrist stripI REAR PANELCRX-M170CRX-M1705I FM SECTIONTuning Range (50 kHz steps) . . . . . . . . . 87.50 to 108.00 MHzSignal to Noise Ratio (Mono) . . . . . . . . . . . . . . . . . . . . . .65 dBSensitivity (S/N 30 dB) . . . . . . . . . . . . . . . . . . . . . . . . 1.0 V/mI AUDIO SECTIONMinimum RMS Output Power Per Channel1 kHz, 0.1% THD, 6 ohms . . . . . . . . . . . . . . . . . . .25 W + 25 WInput Sensitivity/ImpedanceTape, AUX 1, AUX 2 . . . . . . . . . . . . . . . . 300 mV/47 k-ohmsOutput LevelREC OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 280 mVSUB WOOFER (50Hz) . . . . . . . . . . . . . . . . . . . . . . . . . 2.0 VHeadphone Jack Rated OutputCD, etc. (32 ohms) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.0 VFrequency ResponseCD, etc (20Hz to 20kHz) . . . . . . . . . . . . . . . . . . . . . . 0.5 dBTotal Harmonic DistortionCD, etc. 1 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.03%Signal to Noise Ratio (IHF-A-Network)CD, etc. (300 mV, Input Shorted) . . . . . . . . . . . . . . . . . 98 dBTone Control CharacteristicsBASSBoost/cut . . . . . . . . . . . . . . . . . . 10 dB (100 Hz)TREBLEBoost/cut . . . . . . . . . . . . . . . . . . 10 dB (10 kHz)I SPECIFICATIONSI AM SECTIONTuning Range (9 kHz steps) . . . . . . . . . . . . . . .531 to 1629kHzSignal to Noise Ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . .35 dBSensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .600 V/mI GENERALPower Supply . . . . . . . . . . . . . . . . . . . . . . . . . AC 230V, 50 HzPower Consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 WStandby Power Consumption . . . . . . . . . . . . . . . . . . . . .0.9 WDimensions (W x H x D) . . . . . . . . . . . . . .215 x 110 x 359 mm(8-7/16 x 4-5/16 x 14-1/8)Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.4 kg (9 lbs. 11 oz)Finish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Silver colorAccessories . . . . . . . . . . . . . . . . . . . . . . AM loop antenna x 1Indoor FM antenna x 1Indoor DAB antenna x 1Remote Control x 1Battery (size AAA, R03, UM-4) x 2* Specifications subject to change without notice.B . British modelI DAB SECTIONTuning Range (BAND III) . . . . . . . . . . . . 174 MHz to 240 MHzInput . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 ohms (nominal)Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 dBmSelectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 dB typ.Audio Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . Stereo, 2.0 Vp-pDigital Out . . . . . . . . . . . . . . . . . . . . . . 24 bit/48 kHz resolutionI CD PLAYER SECTIONSignal to Noise Ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . .90 dBTotal Harmonic Distortion . . . . . . . . . . . . . . . . . . . . . . 0.007%Separation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90 dBG DIMENSIONSUnit : mm (inch)215 (8-7/16)110 (4-5/16)101 (4)320 (12-5/8)9(3/8)17(11/16)22(7/8)359 (14-1/8)DAB (Digital Audio Broadcasting), also known as digital radio, is a new way of radio broadcasting. DAB is broadcast using digital signals instead of analog signals, resulting in near CD-quality sound. Analog signals (i.e. AM/FM) are susceptible to interference (i.e. distortion and noise) caused by electrical equipment, weather conditions, tall buildings, mountains, etc.; digital signals are not. Thus, with DAB, there is virtually interference-free reception and no hiss or crackle.CRX-M1706CRX-M170qMAIN P.C.B.wPOWER (6) P.C.B.ePOWER (1) P.C.B.rPOWER (4) P.C.B.tPOWER (5) P.C.B.yCD MECHANISM UNITuPOWER (2) P.C.B.iPOWER (3) P.C.B.I INTERNAL VIEWwe rtquiyI DISASSEMBLY PROCEDURES1. Removal of Top Covera. Remove 2 screws ( q ) and 4 screws ( w ). (Fig. 1)b. Slide the Top Cover rearward to remove it. (Fig. 1) Remove parts in disassembly order as numbered. Disconnect the power cable from the AC outlet. Top CoverqqwwFront Panel UnitreeFig. 1Fig. 2CN16WF142. Removal of Front Panel Unita. Disconnect the connectors (WF14 and CN16).(Fig. 2)b. Remove 2 screws ( e ) and 3 screws ( r ), and thenremove the Front Panel Unit. (Fig. 1)CRX-M170CRX-M1707Fig. 3Fig. 43. Removal of Rear Panel and Tuner Modulea. Remove the Cord Stopper. (Fig. 3)b.Remove 8 screws ( t ), 2 screws ( y ), 1 screw ( u )and 4 screws ( i ). (Fig. 3)c. Remove the Rear Panel. (Fig. 3)d. Disconnect the connector (WF20). (Fig. 4)e. Remove the Tuner Module. (Fig. 3)4. Removal of Main, Power (4) and Power (6) P.C.B.sa. Remove the Rear Panel.b. Disconnect the connectors (WF12, WF15, CN10,CN11, CN13, CN18 and CN19). (Fig. 4)c. Remove 2 screws ( o ) and then remove the Main,Power (4) and Power (6) P.C.B.s. (Fig. 4)5. Removal of CD Mechanism Unita. Remove the Front Panel Unit.b. Disconnect the connectors (WF12, CN10 and CN11).(Fig. 4)c. Remove 4 screws ( !0 ). (Fig. 4)d. Remove the CD Mechanism Unit. (Fig. 4)CN18CN11CN10CN19WF15WF12CN13Main P.C.B.Power (4) P.C.B.Power (6) P.C.B.oo!0!0CD Mechanism UnitWF20tyttyuiiiiTunerModuleRear PanelCord StopperCRX-M1708CRX-M170Disc TablePick-up HeadGear ASled Shaft19