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PA
011901
200805-72450
SERVICE MANUAL
I CONTENTS (目次)
SPECIFICATIONS (総合仕様) ..................................................................... 3
PERFORMANC GRAPH (特性図) ............................................................... 4
PANEL LAYOUT (パネルレイアウト) ......................................................... 4
CIRCUIT BOARD LAYOUT (ユニットレイアウト).................................... 5
DIMENSIONS (寸法図).............................................................................. 5
DISASSEMBLY PROCEDURES (分解手順)............................................... 6
IC BLOCK DIAGRAM (ICブロック図) ...................................................... 15
CIRCUIT BOARDS (シート基板図) ........................................................... 15
INSPECTIONS (検査) ............................................................................... 23
BLOCK & LEVEL DIAGRAM (ブロック&レベルダイアグラム)
CIRCUIT DIAGRAM (回路図)
Copyright (c) Yamaha Corporation. All rights reserved.
MSR250
HAMAMATSU, JAPAN
08.06

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   Summary of Contents for Yamaha MSR250

  • Page 1

    DISASSEMBLY PROCEDURES (分解手順)..........6 IC BLOCK DIAGRAM (ICブロック図) ............15 CIRCUIT BOARDS (シート基板図) ............15 INSPECTIONS (検査) ................23 PARTS LIST BLOCK & LEVEL DIAGRAM (ブロック&レベルダイアグラム) CIRCUIT DIAGRAM (回路図) 011901 200805-72450 HAMAMATSU, JAPAN Copyright (c) Yamaha Corporation. All rights reserved. 08.06...

  • Page 2

    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 the users, and have therefore not been restated.

  • Page 3: Specifications

    MSR250 ■ 総合仕様 SPECIFICATIONS G General Specifications ● 一 般仕様 Type ....... 2-way Bass Reflex Powered Speaker 形式 ...... 2ウェイバスレフ型パワードスピーカー Speaker Unit スピーカーユニット LF: ............10" (25 cm) Cone LF: ............10" ( 25 cm) コーン HF: ......1" (2.54 cm) Compression Driver HF:...

  • Page 4: Panel Layout (パネルレイアウト

    MSR250 PERFORMANCE GRAPH (特性図) Frequency Response Frequency PANEL LAYOUT (パネルレイアウト) 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 MIC/LINEスイッチ INPUT 2/3端子 LINK OUT端子...

  • Page 5: Circuit Board Layout (ユニットレイアウト

    MSR250 CIRCUIT BOARD LAYOUT (ユニットレイアウト) Front view Right side view Rear view Speaker HF <Tweeter> (スピーカHF<ツィーター>) NETWORK NETWORK MOTHER CONTROL INPUT CONTROL POWER-b MOTHER POWER-a POWER-b Speaker LF <Woofer> (スピーカLF<ウーファー>) DIMENSIONS (寸法図) Tripod pole diameter 35-36 Unit: mm 2-M8 x 25 * Use of the stand should refer to stand 単位:mm...

  • Page 6: Disassembly Procedures (分解手順

    MSR250 DISASSEMBLY PROCEDURES (分解手順) フロントグリルAss’ y Front Grille Assembly (Time required: About 1 minute) (所要時間:約1分) Remove the four (4) screws marked [100]. The front [100] のネジ4本を外して、フロントグリルAss’ yを外し grille assembly can then be removed. (Fig. 1) ます。 (図1) Speaker LF (Woofer) スピーカLF (...

  • Page 7

    MSR250 スピーカHF ( ツィーター) Speaker HF (Tweeter) (Time required: About 4 minutes) (所要時間:約4分) Separate the front cabinet unit and the rear cabinet unit. フロントキャビネット部とリアキャビネット部を別け (See procedure 3.) ます。 (3項参照) Remove the two (2) screws marked [46]. The speaker [46] のネジ2本を外して、フロントキャビネット部から...

  • Page 8

    MSR250 アンプAss’ y Amplifier Assembly (Time required: About 2 minute) (所要時間:約2分) Remove the ten (10) screws marked [30]. The amplifier [30] のネジ10本を外し、アンプAss’ yを外します。 (図5) assembly can then be removed. (Fig. 5) MOTHERシートのコネクターCN546 ( 2P) に接続されて Disconnect the connector assembly connected to the いるコネクターAss’...

  • Page 9

    MSR250 8. INPUTシート INPUT circuit board (Time required: About 6 minutes) (所要時間:約6分) Remove the amplifier assembly. (See procedure 6.) アンプAss’ yを外します。 (6項参照) Remove the MOTHER circuit board. (See procedure 7.) MOTHERシートを外します。 (7項参照) Remove the three (3) screws marked [130], four (4) [130]...

  • Page 10

    MSR250 CONTROLシート CONTROL circuit board (Time required: About 8 minutes) (所要時間:約8分) Remove the amplifier assembly. (See procedure 6.) アンプAss’ yを外します。 (6項参照) Remove the MOTHER circuit board. (See procedure 7.) MOTHERシートを外します。 (7項参照) Remove the INPUT circuit board. (See procedure 8.) INPUTシートを外します。 (8項参照)...

  • Page 11

    MSR250 AMPシート AMP Circuit Board (Time required: About 7 minutes) (所要時間:約7分) 10-1 Remove the amplifier assembly. (See procedure 6.) 10-1 アンプAss’ yを外します。 (6項参照) 10-2 Remove the MOTHER circuit board. (See procedure 7.) 10-2 MOTHERシートを外します。 (7項参照) 10-3 Remove the INPUT circuit board. (See procedure 8.) 10-3 INPUTシートを外します。...

  • Page 12

    MSR250 ファン (所要時間:約3分) FAN (Time required: About 3 minutes) 12-1 Remove the amplifier assembly. (See procedure 6.) 12-1 アンプAss’ yを外します。 (6項参照) 12-2 Disconnect the connector assembly connected to the 12-2 POWER-bシートのコネクターCN803 ( 2P) に接続されて connector CN802 (2P) of the POWER-b circuit board.

  • Page 13

    MSR250 電源トランス、POWER-aシート Power Transformer and POWER-a Circuit Board (Time required: About 5 minutes) (所要時間:約5分) 13-1 Remove the amplifier assembly. (See procedure 6.) 13-1 アンプAss’ yを外します。 (6項参照) 13-2 Disconnect the connector assemblies connected to the 13-2 POWER-aシートのコネクターCN810 ( 2P) 、CN812 connectors CN810 (2P), CN812 (2P) of the POWER-a (2P)...

  • Page 14

    MSR250 電源スイッチ、ACインレット Power Switch, AC Inlet (Time required: About 7 minutes) (所要時間:約7分) 14-1 Remove the amplifier assembly. (See procedure 6.) 14-1 アンプAss’ yを外します。 (6項参照) 14-2 Remove the two (2) connector assemblies (connector 14-2 電源スイッチとACインレットに半田付けされている束線 assembly (2P) and connector assembly (2P)) and earth 2本...

  • Page 15: Ic Block Diagram (icブロック図

    MSR250 IC BLOCK DIAGRAM (ICブロック図) • NJM2068M-D TE1 (AAX62750) Dual Operational Amplifier INPUT: IC101, 102 CONTROL: IC104, 302, 303, 304 MOTHER: IC541 +DC Voltage Output A Supply Inverting Output B Input A Non-Inverting Inverting Input A Input B Non-Inverting -DC Voltage Supply Input B CIRCUIT BOARDS (シート基板図)...

  • Page 16

    MSR250 • CONTROL Circuit Board LEVEL HIGH LEVEL -3 +3 -6 +6 0 10 to INPUT CN25 HIGH LEVEL -3 +3 -6 +6 0 10 to POWER-b to MOTHER CN802 CN542 Component side (部品側) Pattern side (パターン側) 477286...

  • Page 17

    MSR250 • INPUT Circuit Board LINK OUT LINE 3 LINE 2 INPUT 1 LINE to CONTROL CN26 Component side (部品側) Pattern side (パターン側) 477286...

  • Page 18

    MSR250 • NETWORK Circuit Board to MOTHER CN546 to Speaker HF (TWEETER) to Speaker LF (WOOFER) Component side (部品側) 475008...

  • Page 19

    MSR250 • NETWORK Circuit Board Pattern side (パターン側) 475008...

  • Page 20

    MSR250 • MOTHER Circuit Board to POWER-b to NETWORK CN804 to CONTROL CN24 to AMP CN1100 to AMP CN1101 Component side (部品側) Pattern side (パターン側) 477286...

  • Page 21

    MSR250 • POWER-a Circuit Board No copper foil is on component side. (部品面にはパターンはありません。 ) to POWER SW to POWER-b CN801 to AC IN Component side (部品側) Pattern side (パターン側) 477285...

  • Page 22

    MSR250 • POWER-b Circuit Board No copper foil is on component side. (部品面にはパターンはありません。 ) to CONTROL to MOTHER CN541 to FAN to POWER-a CN801B Component side (部品側) Pattern side (パターン側) 477285...

  • Page 23: Inspections (検査

    MSR250 INSPECTIONS (検査) Test Conditions (試験条件) (1) Measuring Voltage (測定電圧) : AC 100 V 50/60 Hz (J) AC 110 V 60 Hz (T) AC 120 V 60 Hz (U) AC 220 V 50 Hz (O) AC 220 V 60 Hz (K)

  • Page 24

    MSR250 ITEM INTPUT CONDITIONS OUTPUT CONDITIONS NOMINAL LIMIT (項目) (入力条件) (出力条件) (標準値) (限界値) -3.0 ± 2 dB Tone-control INPUT: 1, 2 (Each) REF: 775 mV LINK OUT -3.0 dB (トーンコントロール特性) LOW VR: MIN. Load: 10 kΩ REF: 60 Hz, LOW VR CENTER (基準:775 mV LINK OUT出力)...

  • Page 25: Parts List

    MSR250 PARTS LIST I CONTENTS (目次) OVERALL ASSEMBLY (総組立) ............2 AMPLIFIER ASSEMBLY (アンプAss’ y) ..........4 ELECTRICAL PARTS (電気部品) ............6 Notes: DESTINATION ABBREVIATIONS Australian model South African model British model Chinese model Canadian model South-east Asia model German model...

  • Page 26

    MSR250 OVERALL ASSEMBLY (総組立) O model Amplifier assembly (アンプAss'y) : See page 4. E model Network assembly (ネットワークAss'y) Rear cabinet assembly (リアキャビネットAss'y) Rear cabinet unit (リアキャビネット部) Front cabinet assembly (フロントキャビネットAss'y) Front cabinet unit Front grille assembly (フロントキャビネット部) (フロントグリルAss'y)...

  • Page 27

    MSR250 PART NO. DESCRIPTION 部 品 名 REMARKS REF NO. RANK OVERALL ASSEMBLY 総 組 立 MSR250 OVERALL ASSEMBLY 総 組 立 OVERALL ASSEMBLY 総 組 立 OVERALL ASSEMBLY 総 組 立 OVERALL ASSEMBLY 総 組 立 OVERALL ASSEMBLY 総...

  • Page 28

    MSR250 AMPLIFIER ASSEMBLY (アンプAss’ y) Accessories of Phone Jack (ホーンジャック付属品)...

  • Page 29

    MSR250 PART NO. DESCRIPTION 部 品 名 REMARKS REF NO. RANK AMPLIFIER ASSEMBLY ア ン プ A s s ’ y MSR250 WP929900 REAR PANEL A1H0A0-2 リ ア パ ネ ル 473731 WP930400 REAR PANEL A1H0B0-3 リ ア パ ネ...

  • Page 30

    MSR250 ELECTRICAL PARTS (電気部品) PART NO. DESCRIPTION 部 品 名 REMARKS REF NO. RANK ELECTRICAL PARTS 電 気 部 品 MSR250 WP924900 CIRCUIT BOARD A M P シ ー ト 469839-1 WP925000 CIRCUIT BOARD CONTROL C O N T R O L シ ー ト...

  • Page 31

    MSR250 AMP and CONTROL and INPUT and MOTHER PART NO. DESCRIPTION 部 品 名 REMARKS REF NO. RANK * 3124 WP440100 CARBON RESISTOR (CHIP) 22 1W チ ッ プ 抵 抗 471638 3125 WJ600100 CARBON RESISTOR (CHIP) 27 J チ...

  • Page 32

    MSR250 CONTROL and INPUT and MOTHER PART NO. DESCRIPTION 部 品 名 REMARKS REF NO. RANK * C213 WP064200 CERAMIC CAPACITOR (CHIP) 4.7uF 25V チ ッ プ セ ラ コ ン 458416 C214 AAX6301R CERAMIC CAPACITOR (CHIP) 22pF チ ッ プ セ ラ コ ン...

  • Page 33

    MSR250 CONTROL and INPUT and MOTHER PART NO. DESCRIPTION 部 品 名 REMARKS REF NO. RANK C989 AAX6299R ELECTROLYTIC CAP. (CHIP) 10uF チ ッ プ ケ ミ コ ン 412428 WP923100 CORD ASSEMBLY EH3P 80 A1H0 コ ー ド A s s ’ y...

  • Page 34

    MSR250 CONTROL and INPUT and MOTHER PART NO. DESCRIPTION 部 品 名 REMARKS REF NO. RANK R120 AAX6316R CARBON RESISTOR (CHIP) 120K J チ ッ プ 抵 抗 067505 R154 AAX6281R CARBON RESISTOR (CHIP) 1K J チ ッ プ 抵...

  • Page 35

    MSR250 CONTROL and INPUT and MOTHER and NETWORK and POWER-a and POWER-b PART NO. DESCRIPTION 部 品 名 REMARKS REF NO. RANK R547 WJ606600 CARBON RESISTOR (CHIP) 330K J チ ッ プ 抵 抗 067533 R548 WJ606600 CARBON RESISTOR (CHIP) 330K J チ...

  • Page 36

    MSR250 POWER-a and POWER-b PART NO. DESCRIPTION 部 品 名 REMARKS REF NO. RANK * C807 WP067600 ELECTROLYTIC CAP. 6800uF 80V ケ ミ コ ン 469852 * C808 WP067600 ELECTROLYTIC CAP. 6800uF 80V ケ ミ コ ン 469852 C809 AAX11280 MYLAR CAPACITOR 0.047uF...

  • Page 37

    MSR250 CIRCUIT DIAGRAM I CONTENTS (目次) BLOCK & LEVEL DIAGRAM (ブロック&レベルダイアグラム) ......3 CIRCUIT DIAGRAM (回路図) INPUT ......................4 CONTROL ...................... 5 MOTHER, NETWORK ..................6 AMP ....................... 7 POWER ......................8 I Capacitor (コンデンサー) (ケミカルコンデンサー) : Electrolytic Capacitor (MY)...

  • Page 38

    MSR250 BLOCK & LEVEL DIAGRAM (ブロック&レベルダイアグラム) [逆相] Reverse phase CONTROL INPUT [逆相] HA Gain Reverse phase JK102 35dB IC101 1/2 IC302 2/2 1100(11P) 1101(10P) INPUT IC302 1/2 [-8dBu] (CH1) [-26dBu] [-26dBu] CN544(10P) CN543(10P) [-61~+15dBu] [正相] S101 [逆相] [逆相] Normal phase...

  • Page 39

    MSR250 CIRCUIT DIAGRAM 1/5 (INPUT) INPUT to CONTROL_CN26 <P.5: A2> See parts list for details of circuit board component parts. シート部品詳細は、パーツリストをご参照ください。 S5011963 4 MSR250 MSR250...

  • Page 40

    MSR250 CIRCUIT DIAGRAM 2/5 (CONTROL) CONTROL SP EQ to INPUT_CN25 <P.4: I3> to MOTHER_CN542 <P.6: B4> to POWER-b_CN802 <P.8: B4> : Not installed (未実装) S5011963 4 MSR250 MSR250...

  • Page 41

    MSR250 CIRCUIT DIAGRAM 3/5 (MOTHER, NETWORK) to AMP_1101 to AMP_1100 <P.7: B5> <P.7: B2> to POWER-b_CN804 <P.8: B2> SP EQ to CONTROL_CN24 <P.5: J3> NETWORK (WOOFER) (TWEETER) : Not installed (未実装) MOTHER S5011963 4 MSR250 MSR250...

  • Page 42

    MSR250 CIRCUIT DIAGRAM 4/5 (AMP) to MOTHER_CN544 <P.6: F2> to MOTHER_CN543 <P.6: C2> S5011963 4 MSR250 MSR250...

  • Page 43

    MSR250 CIRCUIT DIAGRAM 5/5 (POWER) POWER-b POWER-a to MOTHER_CN541 <P.6: B3> to CONTROL_CN1 <P.5: B5> * F803: T4AL 250V (J, U, T) T1.6AL 250V (A, B, E, K, O) : Not installed (未実装) KIA7815API (AAX63640) KIA7915PI (AAX63660) REGULATOR +15V REGULATOR -15V...

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