Yamaha-KXE300-tape-sm 维修电路原理图.pdf
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1、SERVICE MANUALI CONTENTSTO SERVICE PERSONNEL . . . . . . . . . . . . . . . . . . . 2REAR PANELS . . . . . . . . . . . . . . . . . . . . . . . . . . . 23SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . 3DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4INTE
2、RNAL VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4DISASSEMBLY PROCEDURES分解手順 . . . . . 57ADJUSTMENTS調整 . . . . . . . . . . . . . . . . . . . . 812DISPLAY DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13IC DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3、. . 1415BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . 16PRINTED CIRCUIT BOARD . . . . . . . . . . . . . . . 1720SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . 21PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2333PARTS LIST FOR CARBON RESISTORS . .
4、 . . . . . 34This 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 YAMAHA Products, are already known and understood by the users,and have therefore not be
5、en restated.WARNING:Failure to follow appropriate service and safety procedures when servicing this product may result in personal injury, destruction of expensivecomponents, and failure of the product to perform as specified. For these reasons, we advise all YAMAHA product owners that any servicere
6、quired 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 applicabletechnical capabilities, or establish a prin
7、ciple-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 YAMAHAare continually striving to improve YAMAHA products. Modifications are, therefore, inevitable and specif
8、ications are subject to change without notice or obligationto retrofit. Should any discrepancy appear to exist, please contact the distributors Service Division.WARNING:Static discharges can destroy expensive components. Discharge any static electricity your body may have accumulated by grounding yo
9、urself tothe ground buss in the unit (heavy gauge black wires connect to this buss).IMPORTANT:Turn the unit OFF during disassembly and part replacement. Recheck all work before you apply power to the unit.IMPORTANT NOTICE100807SERVICE MANUALKX-E300STEREO CASSETTE DECKKX-E300For the system operation
10、of KX-E300, please refer to Service Manual #100805 for the CRX-E300/NX-E300.本機 動作 、CRX-E300/NX-E300 100805 覧。RadioFans.CN 收音机爱 好者资料库KX-E300KX-E3002I TO SERVICE PERSONNEL1. Critical Components InformationComponents having special characteristics are marked Zand must be replaced with parts having spec
11、ifications equalto those 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 impedance should be equivalent to 1500 ohm shuntedby 0.
12、15F.GLeakage current must not exceed 0.5mA.GBe sure to test for leakage with the AC plug in bothpolarities.AC LEAKAGETESTER OREQUIVALENTEQUIPMENTUNDER TESTINSULATINGTABLEWALLOUTLETWARNING: CHEMICAL CONTENT NOTICE!The solder used in the production of this product contains LEAD. In addition, other ele
13、ctrical/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 COM
14、PONENTS 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 han
15、dsbefore handling food.I REAR PANELSM U, C modelsM B, G modelsRadioFans.CN 收音机爱 好者资料库KX-E300KX-E3003M J modelType型式Auto Reverse4-Track 2-Channel Playback/RecordingStereo Cassette DeckHeadsREC/PBHard permalloyEraseDouble Gap FerriteMotorsMainDC servo motorTray LoadingDC motorWow & FlutterW.PEAK (EIAJ
16、)0.19 %W.RMS0.09 %Fast Winding Time早巻時間about 100 seconds (C-60 tape)Frequency Response総合周波数特性Type I (Normal)30 15,000 Hz 3 dBType II (CrO2)30 16,000 Hz 3 dBType IV (Metal)30 18,000 Hz 3 dBS/N Ratio SN比U, C, B, G models (S : 3rd harmonic distortion 3 %, N : Weighted)NR off58 dBDolby B NR on66 dBDolby
17、 C NR on74 dBJ model (S : 0 dB, N : Weighted)NR off54 dBDolby B NR on62 dBDolby C NR on70 dBHarmonic Distortion歪率1.0 %Channel Separation40 dB or moreCrosstalk (125 Hz)55 dB or moreInput Sensitivity/Impedance入力端子Line100 mV/30 kOutput Level出力端子Line570 mV/3.0 kPower Requirements電源電圧U, C modelsAC120 V,
18、60 HzB, G modelsAC230 V, 50 HzJ modelAC100 V, 50/60 HzPower Consumption消費電力U, C, B, G models12 W (Standby 3W)J model9 W (Standby 3W)Dimensions (W x H x D)寸法(幅X 高 X 奥行)217 x 88 x 291 mm(8-9/16 x 3-7/16 x 11-7/16)Weight重量3.0 kg (6 lbs 10 oz.)Finish仕上Silver colorU, C, B, G, J modelsGold colorU, C, G mo
19、delsAccessories付属品Audio Pin Cable x 2, System Control Cable x 1* Specifications are subject to change without notice.U . U.S.A. modelC . Canadian modelB . British modelG. European modelJ. Japanese modelI SPECIFICATIONSDolby noise reduction manufactured under license from DolbyLaboratories Licensing
20、Corporation.“DOLBY” and the double-D symbol V are trademarks of DolbyLaboratories Licensing Corporation.V DOLBY B-C NR実施権基製造。、DOLBY 及 D 記号 V 登録商標。KX-E300KX-E3004I DIMENSIONSI INTERNAL VIEWq MAIN P.C.B. (4)w Cassette Mechanism Unite MAIN P.C.B. (1)r MAIN P.C.B. (2)t MAIN P.C.B. (3)Unit : mm (inch)217
21、 (8-9/16)8 (5/16)80 (3-1/8)88 (3-7/16)6 (3/16)10 (3/8)275 (10-13/16)291 (11-7/16)qertwKX-E300KX-E3005I DISASSEMBLY PROCEDURES分解手順Remove parts in disassembly order as numbered.1. Removal of Top Covera. Remove 4 screws (q) and 4 screws (w) in Fig. 1.b. Lift the Top Cover at the rear and move it rearwa
22、rdslantingly.2. Removal of Front Panela. Disconnect 2 connectors (CB201 and CB209) in Fig. 2.b. Remove 2 screws (e) and 2 screws (r) in Fig. 1.c. Detach the 2 hooks in Fig. 1 and then pull the FrontPanel forward.3. Removal of Cassette Mechanism Unita. Remove 4 screws (t) in Fig. 1.b. Disconnect 3 co
23、nnectors (CB1, CB2 and CB3) in Fig. 3.c. Remove the Cassette Mechanism Unit in Fig. 1.1. 外方a. q4 本w4 本外。(Fi g. 1)b. 後方取外。2. 外方a. 2 所 (CB201 、 CB209) 外。(Fi g. 2)b. e2 本r2 本外。(Fi g. 1)c. 2 所外、 前方外。(Fi g. 1)3. 外方a. t4 本外。(Fi g. 1)b. 3 所 (CB1 、 CB2 、 CB3) 外。(Fi g. 3)c. 外。(Fi g. 1)(番号順取外行。)eerttqCassette
24、 Mechanism Unit HookFront PanelHookTop CoverwqFig. 1Fig. 2CB201CB209KX-E300KX-E30064. Removal of Cassette Mechanisma. Remove 4 screws (y) in Fig. 3.b. Detach the hook in Fig. 3 and then pull out theCassette Mechanism.5. Removal of Main MotorRemove 2 screws (u) in Fig. 3.6. Removal of Pinch RollerDet
25、ach the hook and then remove the Pinch Roller inFig. 4.7. Removal of Head Assya. Remove 1 screw (i) and then remove the RelayP.C.B. in Fig. 4.b. Remove 2 screws (o) and then remove the HeadAssy in Fig. 4.*Perform the azimuth adjustment after installing theHead Assy.CB3CB2CB1F/R BeltMain BeltMain Mot
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