Yamaha-KXE300-tape-sm 电路图 维修手册.pdf

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1、SERVICE MANUAL I CONTENTS TO SERVICE PERSONNEL . . . . . . . . . . . . . . . . . . . 2 REAR PANELS . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2、4 INTERNAL VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 DISASSEMBLY PROCEDURES分解手順 . . . . . 57 ADJUSTMENTS調整 . . . . . . . . . . . . . . . . . . . . 812 DISPLAY DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 IC DATA . . . . . . . . . . . . . . . . . . . . . . . .

3、. . . . . . . 1415 BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . 16 PRINTED CIRCUIT BOARD . . . . . . . . . . . . . . . 1720 SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . 21 PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2333 PARTS LIST FOR CARBO

4、N RESISTORS . . . . . . . 34 This 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 hav

5、e 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 YAMAHA product owner

6、s that any 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 technical capabiliti

7、es, 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. Modifications are, therefo

8、re, 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 your body may have

9、accumulated 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 part replacement. Recheck all work before you apply power to the unit. IMPORTANT NOTICE 100807 SERVICE MANUAL KX-E300 STEREO CASSETTE DE

10、CK KX-E300 For the system operation 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-E300 KX-E300 2 I TO SERVICE PERSONNEL 1. Critical Components Information Components having special characteristics are marked

11、Z and must be replaced with parts having specifications equal to those originally installed. 2. Leakage Current Measurement (For 120V Models Only) When service has been completed, it is imperative to verify that all exposed conductive surfaces are properly insulated from supply circuits. GMeter impe

12、dance should be equivalent to 1500 ohm shunted by 0.15F. GLeakage current must not exceed 0.5mA. GBe sure to test for leakage with the AC plug in both polarities. AC LEAKAGE TESTER OR EQUIVALENT EQUIPMENT UNDER TEST INSULATING TABLE WALL OUTLET WARNING: CHEMICAL CONTENT NOTICE! The solder used in th

13、e production of this product contains LEAD. In addition, other electrical/electronic and/or plastic (where applicable) 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 reprodu

14、ctive harm. DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REASON WHATSOEVER! 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

15、or components located inside the enclosure of this product, wash your hands before handling food. I REAR PANELS M U, C models M B, G models RadioFans.CN 收音机爱 好者资料库 KX-E300 KX-E300 3 M J model Type型式 Auto Reverse 4-Track 2-Channel Playback/Recording Stereo Cassette Deck Heads REC/PBHard permalloy Era

16、seDouble Gap Ferrite Motors MainDC servo motor Tray LoadingDC motor Wow & Flutter W.PEAK (EIAJ)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 dB Type II (CrO2)30 16,000 Hz 3 dB Type IV (Metal)30 18,000 Hz 3 dB S/N Ratio

17、SN比 U, C, B, G models (S : 3rd harmonic distortion 3 %, N : Weighted) NR off58 dB Dolby B NR on66 dB Dolby C NR on74 dB J model (S : 0 dB, N : Weighted) NR off54 dB Dolby B NR on62 dB Dolby C NR on70 dB Harmonic Distortion歪率 1.0 % Channel Separation 40 dB or more Crosstalk (125 Hz) 55 dB or more Inp

18、ut Sensitivity/Impedance入力端子 Line100 mV/30 k Output Level出力端子 Line570 mV/3.0 k Power Requirements電源電圧 U, C modelsAC120 V, 60 Hz B, G modelsAC230 V, 50 Hz J modelAC100 V, 50/60 Hz Power 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

19、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 models Gold colorU, C, G models Accessories付属品 Audio Pin Cable x 2, System Control Cable x 1 * Specifications are subject to change without notice. U . U.S.A. model C . Canadian model B . Brit

20、ish model G. European model J. Japanese model I SPECIFICATIONS Dolby noise reduction manufactured under license from Dolby Laboratories Licensing Corporation. “DOLBY” and the double-D symbol V are trademarks of Dolby Laboratories Licensing Corporation. V DOLBY B-C NR 実施権基製造。 、DOLBY 及 D 記号 V 登録商標。 Ra

21、dioFans.CN 收音机爱 好者资料库 KX-E300 KX-E300 4 I DIMENSIONS I INTERNAL VIEW q MAIN P.C.B. (4) w Cassette Mechanism Unit e MAIN P.C.B. (1) r MAIN P.C.B. (2) t MAIN P.C.B. (3) Unit : mm (inch) 217 (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) qe r t w KX-E300 KX-E300

22、 5 I DISASSEMBLY PROCEDURES分解手順 Remove parts in disassembly order as numbered. 1. Removal of Top Cover a. Remove 4 screws (q) and 4 screws (w) in Fig. 1. b. Lift the Top Cover at the rear and move it rearward slantingly. 2. Removal of Front Panel a. Disconnect 2 connectors (CB201 and CB209) in Fig.

23、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 Front Panel forward. 3. Removal of Cassette Mechanism Unit a. Remove 4 screws (t) in Fig. 1. b. Disconnect 3 connectors (CB1, CB2 and CB3) in Fig. 3. c. Remove the Cassette Mechanism Unit in Fig.

24、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。） e er t t q Cassette Mechanism Unit Hook Front Panel Hook Top Cover w q Fig. 1 Fig. 2

25、 CB201 CB209 KX-E300 KX-E300 6 4. Removal of Cassette Mechanism a. Remove 4 screws (y) in Fig. 3. b. Detach the hook in Fig. 3 and then pull out the Cassette Mechanism. 5. Removal of Main Motor Remove 2 screws (u) in Fig. 3. 6. Removal of Pinch Roller Detach the hook and then remove the Pinch Roller

26、 in Fig. 4. 7. Removal of Head Assy a. Remove 1 screw (i) and then remove the Relay P.C.B. in Fig. 4. b. Remove 2 screws (o) and then remove the Head Assy in Fig. 4. *Perform the azimuth adjustment after installing the Head Assy. CB3 CB2CB1 F/R Belt Main Belt Main Motor Hook yy yy uu Hook Relay P.C.

27、B Hook Pinch Roller (R) Pinch Roller (L) Head Assy oio Fig. 3 Fig. 4 4. 外方 a. y4 本外。 b. 1 所外、 外。（Fi g. 3） 5. 外方 u2 本外、 外。 （Fi g. 3） 6. 外方 外、 外。（Fi g. 4） 7. 外方 a. i1 本外、 Relay P. C. B. 外。（Fi g. 4） b. o2 本外、 外。（Fi g. 4） 交換場合、 調整行 。 KX-E300 KX-E300 7 G a. !0 3 本外。 （Fi g. 5） b. !1 1 本外。 （Fi g. 6） c. !2

28、2 本!3 1 本外。 （Fi g. 7） d. Mai n P. C. B.外。 e. Mai n P. C. B.Fi g. 8置、動作 行。 G Service Position a. Remove 3 screws (!0) in Fig. 5. b. Remove 1 screw (!1) in Fig. 6. c. Remove 2 screws (!2) and 1 screw (!3) in Fig. 7. d. Remove the Main P.C.B. e. Place the Main P.C.B. as shown in Fig. 8 and check them f

29、or operation. Fig. 5 Fig. 7 Fig. 6 Fig. 8 MAIN (2) MAIN (1) !0 !0 !1 !2 !2 !3 Cloth KX-E300 KX-E300 8 1.Before adjustment GSince head magnetization, dust accumulations, etc. are likely to introduce error in the various characteris- tics, it is very important that the heads are properly demagnetized

30、and cleaned. GMake adjustments of mechanical system, playback system and recording system in that order. GExcept for azimuth adjustment, adjust in the forward direction. 2.Instruments required GAudio frequency oscillator GACVM or dual channel (ACVM) GDCVM GWow/flutter meter GOscilloscope GFrequency

31、counter GTorque meter TW-2111A (TX911580).Take up/back tension (FWD) TW-2121A (TX911570).Take up/back tension (RVS) CT-160L (TX911120) . FF/REW 3.Test tape required GMTT-111N (TX911650) . Normal speed GMTT-114N (TX911680) . Azimuth GMTT-212N (TX911660) . Playback level GMTT-256 (TX911300). Playback

32、frequency re- sponse (Normal) GMTT-356 (TX911310). Playback frequency re- sponse (CrO2) GReference tape Type I/Normal (LH) . TDK AC225 (VU167200) Type II/High (CrO2). TDK AC514 (VU167300) Type IV/METAL . TDK AC713 (VU167400) I ADJUSTMENTS調整 1. 調整前 a. 帯磁汚各測定誤差、 、 行。 b. 調整、調整再生系調整録音系調整順 行。 c. 調整以外、方向調

33、整 。 2. 使用測定器 G低周波発振器 G交流電圧計：ACVM G直流電圧計：DCVM G計 G G周波数 G各種 TW2111A (TX911580) . . . . . . . . （FWD ） TW2121A (TX911570) . . . . . . . . （RVS ） CT 160L (TX911120) . . . . . . . . . . .FF/ REW 3. GMTT 111N (TX911650). . . .（3kHz ） GMTT114N (TX911680) . . . .（10kHz ） GMTT212N (TX911660) . . . .再生 GMTT2

34、56 (TX911300). . . . . . .再生周波数特性（用） GMTT356 (TX911310). . . . . . .再生周波数特性（CrO2 用） G LH () . . . . . . . . . . . . . . . . . . . . .TDK AC225 (VU167200) HIGH (CrO2) . . . . . . . . . . . . . . . . . . . . . . .TDK AC514 (VU167300) METAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

35、.TDK AC713 (VU167400) KX-E300 KX-E300 9 TEST MODE (Operation and Display Check) Enter the TEST MODE by pressing the STANDBY/ON button while pressing the STOP button and r button when the power is OFF. （動作） 、電源OFF 状態 STOP r 押 STANDBY/ ON 押 。 DISPLAY (Light all segment)全灯 DISPLAY CHECK (Light a segmen

36、t of each grid) 表示（各 1 所点灯） 1PLAYPLAYPlayback mode without the cassette tape. (Head cleaning mode) 未装着状態再生動作。 （） 2STOPSTOPTo stop the playback mode. 再生停止。 3DIRECTIONDIRECTIONTo change the playback direction in the playback mode. 状態時再生方向反転。 4rDIMMERTo change concentration of the display in the photog

37、raph mode at each pressing of the r button (6 steps). 押写真撮影用表示濃度変。 （6 段階） 5ePHOTO MODEPhotograph mode. Same display as No.4 but without concentration change. 写真撮影NO. 4 同表示。濃度変化。 6DOLBY NRAll display segments lit. 全灯。 7REC/PAUSEVersionTo display the program version and date when pressing the REC/PAUS

38、E button. 日付表示。ex. “6121” “0804” 8MODEDisplay grid and segments short/open check. (Fig. A is OK) 表示。 （Fi g. A 状態正常） 9COUNTER RESETEXITTo exit the TEST MODE and return to the normal mode. 抜、通常戻。 10STANDBY/ONEXITTo exit the TEST MODE and power off. 抜、電源 OFF 。 NO.BUTTONFUNCTIONACTION G TEST POINT MAIN

39、(1) VR203VR204 RRLL VR201VR202 VR101VR103 L R VR104 MAIN (2) TAPE SPEED ADJ. RECORDING BIAS ADJ. PLAYBACK LEVEL ADJ. RECORDING LEVEL ADJ. Azimuth adjustment screw. (REVERSE) Azimuth adjustment screw. (FORWARD) Rec out L: ch 1 Rec out R: ch 2 DC input, X-Y (Resurge) mode NGOK 0.2V 0.2V Fig. A Fig. B

40、KX-E300 KX-E300 10 “MECHANICAL ADJUSTMENT” Item to be Adjusted Check each torque Check FF, REW take up time Azimuth Tape Speed Wow/Flutter Tape CT-160L (FF, REW) TW-2111A (FWD) TW-2121A (RVS) AC-514 (C-60) MTT-114N 10kHz, 10dB MTT-111N 3kHz, 10dB MTT-111N 3kHz, 10dB Step 1 2 3 4 5 Mode FF REW PLAY F

41、F REW PLAY PLAY PLAY Rating FF, REW torque : within 70150g/cm. Take up torque : 3070g/cm. Back tension : 1.56g/cm. 80 to 120 seconds. Playback output of L and R is maxi- mum and phase difference should be minimum both directions. (Fig. B) *3000 Hz Less than 0.19% (WRMS) Remarks After the adjustment

42、make sure to apply screw lock paint. Take measurement at about the center of the test tape. Perform ad- justment in the forward direction and check the tape speed in the re- verse direction. Take measurement at about the center of the test tape. Instrument required Torque meter ACVM Oscilloscope Fre

43、quency counter Wow/flutter meter Adjustment part Azimuth adjustment screw. (Fig. B) VR101 調整 調整項目 各確認 FF 、REW 時 間確認 確認 CT-160L (FF, REW) TW-2111A (FWD) TW-2121A (RVS) AC-514 (C-60) MTT-114N 10kHz, 10dB MTT-111N 3kHz, 10dB MTT-111N 3kHz, 10dB Step 1 2 3 4 5 FF REW PLAY FF REW PLAY PLAY PLAY 調整方法規格 FF

44、 、REW ：70 150g/cm ：30 70g/cm ：1.5 6g/cm 80 120 秒 再生最大左右位相 差最小調整 。 （Fig.B ） *3000 Hz 0.19%（WRMS ）以下 備考 調整後、必 施。 中央 付近測定。 方向調整、 方向 確認。 中央 付近測定。 測定器 ACVM 周波数 調整箇所 調整 （Fig.B ） VR101 + 30 - 15 + 30 - 15 *交換後、初期特性補 2980 Hz設定。 + 30 - 15 * After replacing the motor or cassette mechanism, perform adjustment

45、in the rating of 2980 Hz to compensate the motors initial characteristic. + 30 - 15 KX-E300 KX-E300 11 “ELECTRICAL ADJUSTMENT” GUse 560 mV (250 nwb/m) for 0 dB as the standard level of the unit. 0dB = 250 nwb/m (315 Hz) = 7 dBV (Rec out level) Item to be Adjusted Playback level (315Hz) Confirmation

46、of playback frequency response Step 1 2 Rating 5 dBV 0.3 dBV Check that the 10kHz playback level is within 0 3 dB of the 1kHz playback level. (Fig. C) Adjustment parts VR201 (L ch) VR202 (R ch) Tape MTT-212N 315Hz, 250nwb/m Test tape for frequency check. 3180s + 120s (LH) (MTT-256) 3180s + 70s (CrO2

47、) (MTT-356) Points of measurement LINE OUT LINE OUT Mode PLAY PLAY Instrument required ACVM ACVM Oscilloscope Fig. C 4dB 3.5dB 1k 3dB 3dB 3k10kHz3152505012.5kHz G PLAYBACK FREQUENCY RESPONSE Rating Adjust for equal record and playback levels. ( 25 dBV 0.3 dBV) Adjust for equal record and playback le

48、vels. ( 25 dBV 0.5 dBV) Perform recording/playback and confirm that the fre- quency response shown in Fig. D is obtained. If not, perform adjustment again at High (CrO2) so that the frequency response in Fig. D is obtained. Perform recording/playback and confirm that there is no output level differe

49、nce. ( 25 dBV 0.5 dBV) If the value is not as speci- fied, perform adjustment again according to Steps 1 and 2. Item to be Adjusted Recording level Recording bias (Total frequency response) Confirmation of recorded level Step 1 2 3 Points of measurement LINE OUT LINE OUT LINE OUT Mode REC PLAY REC PLAY REC PLAY Instrument required ACVM Audio frequency oscillator ACVM Audio frequency os