Yamaha-MSR-250-Service-Manual电路原理图.pdf

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1、SERVICE MANUAL SPECIFICATIONS （総合仕様） .3 PERFORMANC GRAPH （特性図） .4 PANEL LAYOUT （） .4 CIRCUIT BOARD LAYOUT （）.5 DIMENSIONS （寸法図）.5 DISASSEMBLY PROCEDURES （分解手順）.6 IC BLOCK DIAGRAM （IC図） .15 CIRCUIT BOARDS （基板図） .15 INSPECTIONS （検査） .23 PARTS LIST BLOCK & LEVEL DIAGRAM （&） CIRCUIT DIAGRAM （回路図） I CONT

2、ENTS （目次） PA011901 200805-72450 Copyright (c) Yamaha Corporation. All rights reserved. 08.06 HAMAMATSU, JAPAN MSR250 RadioFans.CN 收音机爱 好者资料库 MSR250 2 IWARNING Components having special characteristics are marked and must be replaced with parts having specification equal to those originally installed

3、. 印部品、安全維持重要部品。交換場合、安全必指定部品使用。 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 inherent to the industry, and more specifically Yamaha Products, are already known and understood by

4、 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, destruc- tion of expensive components and failure of the product to perform as specified. For these reasons, we advise all

5、Yamaha product owners that all service required should be performed by an authorized Yamaha Retailer or the appointed service representative. IMPORTANT:This presentation or sale of this manual to any individual or firm does not constitute authorization, certification, recognition of any applicable t

6、echnical capabilities, or establish a principal-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

7、tions are, therefore, inevitable and changes in specifica- tion 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 e

8、lectricity your body may have accumulated by grounding yourself to the ground bus in the unit (heavy gauge black wires connect to this bus). IMPORTANT:Turn the unit OFF during disassembly and parts replacement. Recheck all work before you apply power to the unit. IMPORTANT NOTICE FOR THE UNITED KING

9、DOM Connecting the Plug and Cord WARNING:THIS APPARATUS MUST BE EARTHED IMPORTANT.The wires in this mains lead are coloured in accordance with the following code: GREEN-AND-YELLOW:EARTH BLUE:NEUTRAL BROWN:LIVE As the colours of the wires in the mains lead of this apparatus may not correspond with th

10、e coloured markings identifying the terminals in your plug, proceed as follows: The wire which is coloured GREEN and YELLOW must be connected to the terminal in the plug which is marked by the letter E or by the safety earth symbol or colored GREEN or colored GREEN and YELLOW. The wire which is colo

11、ured BLUE must be connected to the terminal which is marked with the letter N or coloured BLACK. The wire which is coloured BROWN must be connected to the terminal which is marked with the letter L or coloured RED. WARNING: This product contains chemicals known to the State of California to cause ca

12、ncer, or birth defects or other reproductive harm. DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REASON WHAT SO EVER! Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose eyes to solder/flux v

13、apor! If you come in contact with solder or components located inside the enclosure of this product, wash your hands before handling food. RadioFans.CN 收音机爱 好者资料库 MSR250 3 I SPECIFICATIONS 総合仕様 G General Specifications Type. 2-way Bass Refl ex Powered Speaker Speaker Unit LF:.10 (25 cm) Cone HF: . 1

14、 (2.54 cm) Compression Driver Frequency Range. 55 Hz20 kHz (-10 dB) Maximum Output Level . 116 dB (1 m on Axis) Directional Angle. 90 (H)/40 (V) Dimension (W x H x D) . 342 x 544.5 x 298 mm Weight . 14.1 kg Color. Black Tripod Pole Diameter . 3536 mm Included Accessories.Power cord (AC inlet type, 2

15、.5 m) Owners Manual G Amp. Unit Maximum Output Power .200 W at 1 kHz, THD=1 %, RL=4 Crossover Frequency . 4.0 kHz (LF: 12 dB/oct, HF: 12 dB/oct.) Input Sensitivity INPUT 1 (XLR): . -60 dBu* (MIC), -30 dBu* (LINE) (Phone): . -50 dBu* (MIC), -20 dBu* (LINE) INPUT 2/3 (Phone/RCA-pin): . -20 dBu* Input

16、Impedance INPUT 1:. 2 k (XLR), 6 k (Phone) INPUT 2/3:. 10 k Output Impedance .LINK OUT: 600 Controls LEVEL Control:. INPUT 1, 2/3 CH EQLOW:.3 dB at 60 Hz HIGH:. 6 dB at 10 kHz POWER Switch (ON/OFF) Input/Output Connectors INPUT 1:. XLR-3-31 / PHONE (balanced) INPUT 2/3:. PHONE / RCA-pin (unbalanced)

17、 Indicators POWER Indicator: .Green LED LIMITER Indicator: . Red LED Power Consumption .40 W * 0 dBu=0.775 V 一 般仕様 形式. 2型 LF： .10 （25 cm） HF： . 1 （2.54 cm） 再生周波数帯域.55 Hz20 kHz （-10 dB） 最大出力音圧 . 116 dB （軸上1 m） 指向角度. 90（H） 40（V） 最大外形寸法 （W x H x D） . 342 x 544.5 x 298 mm 質量. 14.1 kg 色. 黒 三脚径. 3536 mm 付

18、属品.電源 （AC型、2.5 m） 取扱説明書 定格最大出力 .200 W at 1 kHz、THD1 、RL4 周波数 . 4.0 kHz （LF：12 dBoct、HF：12 dBoct.） 入力感度 INPUT 1 （XLR） ： .-60 dBu* （MIC） 、-30 dBu* （LINE） （Phone） ： .-50 dBu* （MIC） 、-20 dBu* （LINE） INPUT 23 （PhoneRCA-pin） ： .-20 dBu* 入力 INPUT 1： . 2 k （XLR） 、6 k （Phone） INPUT 23： .10 k 出力 . LINK OUT：60

19、0 LEVEL：. INPUT 1、23 CH EQLOW： .3 dB at 60 Hz HIGH： . 6 dB at 10 kHz POWER （ONOFF） 入出力端子 INPUT 1： . XLR-3-31PHONE （balanced） INPUT 23： . PHONERCA-pin （unbalanced） POWER： .緑色発光LED LIMITER：.赤色発光LED 消費電力. 40 W * 0 dBu0.775 V MSR250 4 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 I PANEL LAYOUT （） 5 6 7 1 3 4

20、 8 9 0 2 I PERFORMANCE GRAPH （特性図） Frequency Response Frequency Response INPUT 1 jacks MIC/LINE switch INPUT 2/3 jacks LINK OUT jack EQ controls LEVEL controls LIMITER indicator POWER indicator POWER switch AC IN connector INPUT 1端子 MICLINE INPUT 23端子 LINK OUT端子 EQ LEVEL LIMITER POWER POWER AC IN端子

21、MSR250 5 I CIRCUIT BOARD LAYOUT （） I DIMENSIONS （寸法図） 342 544.5 298 Tripod pole diameter 35-36 三脚径 三脚使方 取扱説明書参照。 *Use of the stand should refer to stand manufacturers instructions. 120 152 2-M8 x 25 Unit: mm 単位：mm Front viewRight side viewRear view CONTROL POWER-a POWER-b CONTROL MOTHER MOTHER INPUT

22、 Speaker HF （HF） NETWORKNETWORK Speaker LF （LF） AMPAMPPOWER-b MSR250 6 Speaker LF （LF） Front grille assembly （Assy） 100 80 80 8080 100 100 100 80 Front cabinet unit （ 部） Rear cabinet unit （部） 50 5050 50 Fig. 1（図1）Fig. 2（図2） （束線HF （黄） ） （HF （） ） （束線HF （青） ） Speaker HF (Tweeter) Wire HF (Yellow) Wire

23、HF (Blue) 80:BIND HEAD TAPPING SCREW-P 5x18 BLACK CR3 (WJ559700) P BIND 100: BIND HEAD TAPPING SCREW-P 4x12 NI-BL (WJ329500) P BIND 50:BIND HEAD TAPPING SCREW-A 5x45 NI-BL (WJ329900) A BIND （束線LF （黒） ） （LF （） ） （束線LF （赤） ） Speaker LF (Woofer) Wire LF (Black) Wire LF (Red) Photo. 1（写真 1）Photo. 2（写真 2

24、） I DISASSEMBLY PROCEDURES （分解手順） 1.Front Grille Assembly (Time required: About 1 minute) 1-1Remove the four (4) screws marked 100. The front grille assembly can then be removed. (Fig. 1) 2.Speaker LF (Woofer) (Time required: About 3 minutes) 2-1Remove the front grille assembly. (See procedure 1.) 2

25、-2Remove the eight (8) screws marked 80. The speaker LF (Woofer) can then be removed. (Fig. 1) 2-3Disconnect the connector assembly LF (red/black) con- nected to the speaker LF (Woofer). (Photo. 1) * Take care not to drop the speaker LF (woofer) be- cause its heavy. 3.Front Cabinet Unit and Rear Cab

26、inet Unit (Time required: About 3 minutes) 3-1Remove the fourteen (14) screws marked 50. The front cabinet unit and the rear cabinet unit can then be sepa- rated. (Fig. 2) 3-2Disconnect the connector assembly LF (red/black) con- nected to the speaker LF (Woofer) and the connector assembly HF (yellow

27、/blue) connected to the speaker HF (Tweeter). (Photo. 1, 2) 1.Ass y （所要時間：約1分） 1-1100 4本外、Ass y外 。 （図1） 2.LF （） （所要時間：約3分） 2-1Ass y外。 （1項参照） 2-280 8本外、LF （） 外 。 （図1） 2-3LF （） 取付束線LF （赤黒） 外。 （写真1） LF （） 重量落下 注意。 3.部、部 （所要時間：約3分） 3-150 14本外、部 部別。 （図2） 3-2LF （） 取付束線LF （赤黒） 、HF （） 取付 束線HF （黄青） 外。 （写真1、2

28、） MSR250 7 Network holder D （固定金具D） NETWORK 13x2 x2 15d Network holder C （固定金具C） 15d CN8 13 NETWORK assembly （Assy） Fig. 3（図 3） Fig. 4（図 4） 4.Speaker HF (Tweeter) (Time required: About 4 minutes) 4-1Separate the front cabinet unit and the rear cabinet unit. (See procedure 3.) 4-2Remove the two (2) s

29、crews marked 46. The speaker HF (Tweeter) can then be removed from the front cabi- net unit. (Fig. 3) 5.NETWORK Circuit Board (Time required: About 4 minutes) 5-1Separate the front cabinet unit and the rear cabinet unit. (See procedure 3.) 5-2Disconnect the connector assembly connected to the connec

30、tor CN8 (2P) of the NETWORK circuit board. 5-3Remove the four (4) screws marked 13. The NET- WORK assembly can then be removed from the rear cabinet unit. (Fig. 4) 5-4Remove the four (4) screws marked 15d. The NET- WORK circuit board and the network holders C and D can then be separated. (Fig. 4) 5.

31、NETWORK （所要時間：約4分） 5-1部部別 。 （3項参照） 5-2NETWORKCN8 （2P） 接続 Ass y外。 5-313 4本外、部 Ass y外。 （図4） 5-415d 4本外、NETWORK 固定金具C、D別。 （図4） 4.HF （） （所要時間：約4分） 4-1部部別 。 （3項参照） 4-246 2本外、部 HF （） 外。 （図3） 13:BIND HEAD TAPPING SCREW-B 3.0 x10 NI-BL (AAX61710) B BIND 15d: PAN HEAD TAPPING SCREW-B 3.0 x8 CR3 WITH FLANGE (

32、AAX61700) B PAN Speaker HF (Tweeter) （HF （） ） 46 46:BIND HEAD TAPPING SCREW-B 4.0 x20 NI-BL (AAX61630) B BIND Rear Cabinet Unit （部） MSR250 8 200A 200A CN546 CN541 CN542 11011100 MOTHER AMP 171 Positive thermistor （） 172 Tube UL black x 2 （黒） Fig. 5（図5） 6.Amplifier Assembly (Time required: About 2 mi

33、nute) 6-1Remove the ten (10) screws marked 30. The amplifier assembly can then be removed. (Fig. 5) 6-2Disconnect the connector assembly connected to the connector CN546 (2P) of the MOTHER circuit board. (Fig. 6) 7.MOTHER Circuit Board (Time required: About 4 minutes) 7-1Remove the amplifier assembl

34、y. (See procedure 6.) 7-2Disconnect the connector assemblies connected to the connectors CN541 (5P) and CN542 (5P) of the MOTHER circuit board. (Fig. 6) 7-3Remove the three (3) screws marked 200A. (Fig. 6) 7-4Remove the MOTHER circuit board from the connec- tors 1100 (11P) and 1101 (10P) of the AMP

35、circuit board. (Fig. 6) *The positive thermistor marked 171 and two (2) black tubes marked 172 are not parts of the MOTHER circuit board. When replacing the MOTHER circuit board, be sure to remove these parts and attach them to the new MOTHER cir- cuit board. 6.Ass y （所要時間：約2分） 6-130 10本外、Ass y外。 （図

36、5） 6-2MOTHERCN546 （2P） 接続 Ass y外。 （図6） .MOTHER （所要時間：約4分） 7-1Ass y外。 （6項参照） 7-2MOTHERCN541 （5P） 、CN542 （5P） 接続Ass y外。 （図6） 7-3200A 3本外。 （図6） 7-4AMP1100 （11P） 、1101 （10P） MOTHER外。 （図6） 171 172 黒2個、 MOTHER構成部品。 MOTHER交換際必取 外、新MOTHER取付 。 30:BIND HEAD TAPPING SCREW-P 4x12 NI-BL (WJ329500) P BIND Fig. 6（

37、図 6） 200A: BIND HEAD TAPPING SCREW-B 3.0 x8 CR3 (AAX61980) B BIND Amplifier assembly （Assy） 30 3030 30 MSR250 9 Fig. 7（図 7） 8.INPUT circuit board (Time required: About 6 minutes) 8-1Remove the amplifier assembly. (See procedure 6.) 8-2Remove the MOTHER circuit board. (See procedure 7.) 8-3Remove the

38、 three (3) screws marked 130, four (4) hexagonal nuts and four (4) washers. (Fig. 7) 8-4Remove the INPUT circuit board from the connector CN26 (6P) of the CONTROL circuit board. (Fig. 7) *The push button marked 150 and push spacer marked 155 are not parts of the INPUT circuit board. When replacing t

39、he INPUT circuit board, be sure to remove these parts and attach them to the new INPUT circuit board. .INPUT （所要時間：約6分） 8-1Ass y外。 （6項参照） 8-2MOTHER外。 （7項参照） 8-3130 3本、六角4個、4個外 。 （図7） 8-4CONTROLCN26 （6P） INPUT 外。 （図7） 150 155 、INPUT構成部品。 INPUT交換際必取外 、新INPUT取付。 CN26 150 Push button （ ） 155 Push spacer

40、 （ ） INPUT CONTROL INPUT 130 Hexagonal nut （六角 ） Hexagonal nut （六角 ） Washer （ ） Washer （ ） 130: BIND HEAD TAPPING SCREW-B 3.0 x10 NI-BL (AAX61710) B BIND MSR250 10 Fig. 8（図 8） 9.CONTROL circuit board (Time required: About 8 minutes) 9-1Remove the amplifier assembly. (See procedure 6.) 9-2Remove the

41、MOTHER circuit board. (See procedure 7.) 9-3Remove the INPUT circuit board. (See procedure 8.) 9-4Disconnect the connector assembly connected to the connector CN802 (3P) of the POWER-b circuit board. (Fig. 8) 9-5Remove the four (4) screws marked 80A. The CON- TROL circuit board can then be removed. (Fig. 8) *The six (6) volume knobs marked 160 are not parts of the CONTROL circuit board. When re- placing the CONTROL circuit board, be sure to remove these parts and attach them to the new CONTROL circuit board. 9.CONTROL （所要時間：約8分） 9-1Ass y外。 （6項参照）