Yamaha-CRXM-170-Service-Manual电路原理图.pdf

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1、100975 SERVICE MANUAL CRX-M170 IMPORTANT NOTICE This 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 already known and understood by

2、 the users, and have therefore not been restated. WARNING:Failure to follow appropriate service and safety procedures when servicing this product may result in personal injury, destruction of expensive components and failure of the product to perform as specified. For these reasons, we advise all YA

3、MAHA product owners that all service required should be performed by 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, certification or recognition of any applicable te

4、chnical 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, and service departments of YAMAHA are continually striving to improve YAMAHA products. Modifica

5、tions are, therefore, inevitable and specifications are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist, please contact the distributors Service Division. WARNING:Static discharges can destroy expensive components. Discharge any static electricity y

6、our 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) .9 WIRING DIA

7、GRAM .10 PRINTED CIRCUIT BOARD .1113 BLOCK DIAGRAM.14 SCHEMATIC DIAGRAM.1517 REMOTE CONTROL .19 PARTS LIST.2021 I CONTENTS TO SERVICE PERSONNEL .23 PREVENTION OF ELECTRO STATIC DISCHARGE.4 REAR PANEL .4 SPECIFICATIONS.5 INTERNAL VIEW .6 DISASSEMBLY PROCEDURES .68 MAINTENANCE FLOW CHART (CD) .9 CD/DA

8、B RECEIVER CRX-M170 STANDBY/ON 1234 5678 90 BANDPRESETTUNER TIMERDIMMER SLEEP FUNCTION/ FM MODEINFO/TEXT AUTO TUNEENTER AUX 2AUX 1TAPECD REPEATA-BPROGCLEAR RANDOMTIME MUTE VOLUME + 2005 YAMAHA CORPORATION. All rights reseved. This manual is copyrighted by YAMAHA and may not be copied or redistribute

9、d either in print or electronically without permission. 05.09 RadioFans.CN 收音机爱 好者资料库 CRX-M170 2 CRX-M170 I TO SERVICE PERSONNEL WARNING: CHEMICAL CONTENT NOTICE! The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and/or plastic (where applicabl

10、e) components may also contain traces of chemicals found by the California Health and Welfare 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 FOR ANY REASON WHATSOEVER

11、! Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose eyes to solder/flux vapor! If you come in contact with solder or components located inside the enclosure of this product, wash your hands before handling food. WARNING: Laser Saf

12、ety This 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 must be used during servicing of the unit. 1) When testing and/or repairing any

13、 component within the product, keep your eyes and skin more than 30 cm away from the 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 control

14、s, adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. About Lead Free Solder The P.C.B.s installed in this unit are soldered using the following solder. SIDE ASIDE B MAIN P.C.B.Lead Free SolderLead Free Solder POWER P.C.B.Lead Free

15、Solder Side A Side B SMT REFLOW Process MI FLOW Process Solder Dip Among some types of lead free solder currently available, it is recommended to use one of the following types for the repair work. Sn + Ag + Cu (tin + silver + copper) Sn + Cu (tin + copper) Sn + Zn + Bi (tin + zinc + bismuth) Cautio

16、n: 1. As the melting point temperature of the lead free solder is about 30C to 40C (50F to 70F) higher than that of the lead solder, 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

17、be replaced and from the 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-M170 CRX-M170 3 Laser Emitting conditions: 1) When the Top Cover is removed, and the “STANDBY/ON” SW is turned to the ON positi

18、on, the laser component will emit a beam for several seconds to detect if a disc is present. During this time (5-10 sec.) the laser may radiate through the 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.

19、When a disc is set, you will not be exposed to any laser emissions. 2) The laser power level can be adjusted with the VR on the pick-up PWB. However, this level has been set by the factory prior to shipping from the factory. Do not adjust this laser level control unless instruction is provided elsew

20、here in this manual. Adjustment of this control can increase the laser emission level from the device. Laser Diode Properties GMaterial: GaAlAs GWavelength: 789 nm GEmission Duration : Continuous GLaser Output: max. 44.6 W* * This output is the value measured at a distance of about 200 mm from the o

21、bjective lens surface on the Optical Pick-up Block. When checking the laser diode emission, keep your eyes more than 30 cm away from the objective lens. VARO!: AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALTTIINA NKYMTTMLLE LASER-STEILYLLE. L KATSO STEESEEN. VARNING! : OSYNLIG LASERSTRLNING NR DENN

22、A DEL R PPNAD OCH SPRREN R URKOPPLAD. BETRAKTA EJ STRLEN. Optical Pick-up ADVARSEL - 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 LASE

23、RSTEILY. 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

24、 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-E700 CLASS 1 LASER PRODUCT LASER KLASSE 1 PRODUKT LUOKAN 1 LASERLAITE KLASS 1 LASER APPARAT PRODUIT LASER DE CLASSE 1 CRX-

25、M170 4 CRX-M170 I PREVENTION OF ELECTRO STATIC DISCHARGE Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect tr

26、ansistors 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 b

27、ody by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap, which should be removed for potential shock reasons prior to applying power to the unit under test. 2. After removing an electrical assembly equipped with ES devices, place the

28、assembly on a conductive surface such as aluminum foil, to prevent electrostatic 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 “an

29、ti-static (ESD protected)” can generate electrical 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

30、 are ready to install it. (Most replacement ES devices 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 ma

31、terial to the chassis or circuit 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

32、the brushing together of your 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 prevention 1.Human body grounding. Use the antistatic wrist strap to discharge the static ele

33、ctricity from your body. 2.Work table grounding. Put a conductive material (sheet) or steel sheet on the area where the optical pickup is placed and ground the sheet. Caution: The static electricity of your clothes will not be grounded through the wrist strap. So take care not to let your clothes to

34、uch the optical pickup. 1M-ohms Conductive material (sheet) or steel sheet Anti-static wrist strip I REAR PANEL CRX-M170 CRX-M170 5 I FM SECTION Tuning Range (50 kHz steps) . . . . . . . . . 87.50 to 108.00 MHz Signal to Noise Ratio (Mono) . . . . . . . . . . . . . . . . . . . . . .65 dB Sensitivity

35、 (S/N 30 dB) . . . . . . . . . . . . . . . . . . . . . . . . 1.0 V/m I AUDIO SECTION Minimum RMS Output Power Per Channel 1 kHz, 0.1% THD, 6 ohms . . . . . . . . . . . . . . . . . . .25 W + 25 W Input Sensitivity/Impedance Tape, AUX 1, AUX 2 . . . . . . . . . . . . . . . . 300 mV/47 k-ohms Output Le

36、vel REC OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 280 mV SUB WOOFER (50Hz) . . . . . . . . . . . . . . . . . . . . . . . . . 2.0 V Headphone Jack Rated Output CD, etc. (32 ohms) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.0 V Frequency Response CD, etc (20Hz

37、 to 20kHz) . . . . . . . . . . . . . . . . . . . . . . 0.5 dB Total Harmonic Distortion CD, etc. 1 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.03% Signal to Noise Ratio (IHF-A-Network) CD, etc. (300 mV, Input Shorted) . . . . . . . . . . . . . . . . . 98 dB Tone Control Chara

38、cteristics BASSBoost/cut . . . . . . . . . . . . . . . . . . 10 dB (100 Hz) TREBLEBoost/cut . . . . . . . . . . . . . . . . . . 10 dB (10 kHz) I SPECIFICATIONS I AM SECTION Tuning Range (9 kHz steps) . . . . . . . . . . . . . . .531 to 1629kHz Signal to Noise Ratio . . . . . . . . . . . . . . . . .

39、. . . . . . . . . . .35 dB Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .600 V/m I GENERAL Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . AC 230V, 50 Hz Power Consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 W Standby Power Con

40、sumption . . . . . . . . . . . . . . . . . . . . .0.9 W Dimensions (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 . . . . . . . . . . . . . . . . . . . . . . . . . . . .

41、. . . . . . . . Silver color Accessories . . . . . . . . . . . . . . . . . . . . . . AM loop antenna x 1 Indoor FM antenna x 1 Indoor DAB antenna x 1 Remote Control x 1 Battery (size AAA, R03, UM-4) x 2 * Specifications subject to change without notice. B . British model I DAB SECTION Tuning Range (

42、BAND III) . . . . . . . . . . . . 174 MHz to 240 MHz Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 ohms (nominal) Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 dBm Selectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

43、. . 35 dB typ. Audio Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . Stereo, 2.0 Vp-p Digital Out . . . . . . . . . . . . . . . . . . . . . . 24 bit/48 kHz resolution I CD PLAYER SECTION Signal to Noise Ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . .90 dB Total Harmonic Dis

44、tortion . . . . . . . . . . . . . . . . . . . . . . 0.007% Separation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90 dB G DIMENSIONS Unit : 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), als

45、o 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 conditio

46、ns, tall buildings, mountains, etc.; digital signals are not. Thus, with DAB, there is virtually interference-free reception and no hiss or crackle. CRX-M170 6 CRX-M170 qMAIN 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 UNIT uPOWER (2) P.C.B. iPOWER (3

47、) P.C.B. I INTERNAL VIEW we rtq uiy I DISASSEMBLY PROCEDURES 1. Removal of Top Cover a. 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 Cover q q w w Front Panel Unitr e e Fig. 1Fig. 2 CN16 WF14 2. Removal of Front Panel