Accuphase E-550 Service Information
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Accuphase E-550 Service Information

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Authorized Technical Service Only
CAUTION /
These servicing instructions are for use by qualified personnel only.
To reduce the risk of electric shock do not perform any servicing
other than that contained in the operating instructions unless you are
qualified to do so. Refer all servicing to qualified service personnel.
ここに記載したサービスに関する指示事項は、サービスに関する資格を
有する者のみが使用するものです。感電防止の観点から、サービス資格
を有していない方は、取扱指示事項以外のサービスは絶対に行わないよ
うにして下さい。
Attention mark indicating critical components for safety.
Replacement must be made with identical parts of special part number.
このマークのついている部品は、安全上重要な部品です。
必ず指定されている部品番号の部品を使用して下さい。
Bi-lingual
回 路 図

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Summary of Contents for Accuphase E-550

  • Page 1 Bi-lingual Authorized Technical Service Only 回 路 図 CAUTION / These servicing instructions are for use by qualified personnel only. To reduce the risk of electric shock do not perform any servicing other than that contained in the operating instructions unless you are qualified to do so.
  • Page 2 EXPLANATION OF SURFACE PARTS Knob for VOLUME Meter Front Glass ★ ﾂﾏﾐ ﾒｰﾀｰ ﾌﾛﾝﾄｶﾞﾗｽ Decoration Screw (381-4501-14) (178-2041-00) (172-0140-03) 飾りﾈｼﾞ/4pcs. (630-0307-14) Side Panel ｻｲﾄﾞﾊﾟﾈﾙ Washer ﾜｯｼｬ/4pcs. (139-0043-02） (637-9045-04) Knob for INPUT ﾂﾏﾐ (381-4503-04) ★ Push-button for POWER ﾌﾟｯｼｭﾎﾞﾀﾝ (388-5062-03) Power Push Switch (354-1023-00) ★...

  • Page 3: Front View

    FRONT VIEW Knob for VOLUME Knob for INPUT ﾂﾏﾐ ﾂﾏﾐ (381-4501-14) (381-4503-04) Head Phone Jack ﾍｯﾄﾞﾎﾝｼﾞｬｯｸ (302-1204-00) Knob for TONE,BAL, ﾂﾏﾐ (384-1405-04) Front Panel=131-0187-11 1pce. 7 Panel Name Plate=180-1102-13 1pce. ﾌﾛﾝﾄﾊﾟﾈﾙ ﾊﾟﾈﾙﾈｰﾑﾌﾟﾚｰﾄ Sub-panel =134-0154-02 1pce. 8 Push-button=389-5084-03 ｻﾌﾞﾊﾟﾈﾙ ﾌﾟｯｼｭﾎﾞﾀﾝ /TONE,COMP,MODE,METER 1pce.
  • Page 4 Shield Case ｼｰﾙﾄﾞ板 (231-0068-03) Protection Assembly ﾌﾟﾛﾃｸｼｮﾝ Ass'y IO Relay Assembly (720-0075-00) IOﾘﾚｨ Ass'y (716-0731-00) Power Amp Assembly(L) Power Amp Assembly(R) ﾊﾟﾜｰｱﾝﾌﾟ Ass'y (L) ﾊﾟﾜｰｱﾝﾌﾟ Ass'y (R) (717-0087-00) (717-0087-00) Input Selector Assembly ｲﾝﾌﾟｯﾄｾﾚｸﾀ Ass'y (716-0734-00) Meter Lanp Assembly ﾒｰﾀﾗﾝﾌﾟAss'y (723-0117-00) Selector LED Assembly ｾﾚｸﾀLED Ass'y Receiver Assembly...
  • Page 5 Pilot LED ﾊﾟｲﾛｯﾄLED/D1 (SDPW3DG0B0-J) Indicator Receiver Assembly ｲﾝﾃﾞｨｹｰﾀ 受光器Ass'y (173-9084-03) (721-0082-00) Rotary Switch Display Ass'y ﾛｰﾀﾘｽｲｯﾁ / S1 ﾃﾞｨｽﾌﾟﾚｲAss'y (339-0002-00) (723-0116-00) Input Selector Assembly ｲﾝﾌﾟｯﾄｾﾚｸﾀ Ass'y (716-0734-00) Foot 脚 (238-0023-00) Power Meter ﾊﾟﾜｰﾒｰﾀ (178-2041-00) Selector LED Assembly Variable Resistor ｾﾚｸﾀLED Ass'y 可変抵抗器/VR1:10kΩ-A (723-0118-00) (575-2026-00)
  • Page 6 MISCELLANEOUS 本体その他使用部品 Description(部 品名) Description(部品 名) Parts No.(部 品No.) Remarks(備 考) Parts No.(部品No.) Remarks(備考) Screws for PC Board for Front Panel / ﾌﾛﾝﾄﾊﾟﾈﾙ用 ﾈｼﾞ類 Balance Inpnt Assembly 115-1658-00 Binding Screw/ﾊﾞｲﾝﾄﾞﾂﾒﾂｷBﾀｲﾄ 61B-0308-04 3×8mm 4pcs. VI Assembly 115-1662-00 IV Assembly Panel End Cap /ﾊﾟﾈﾙｴﾝﾄﾞｷｬｯﾌﾟ 115-1663-00 631-0044-10 3×6mm...
  • Page 7 Balance Input Amp Assembly (712-0097 RELAY4 RELAY RELAY2 RELAY3 Pin Jack 302-0412-00 Diode D1 ～4 MA165 ﾋﾟﾝｼﾞｬｯｸ ﾀﾞｲｵｰﾄﾞ XLR(Cannon)Receptacle JK2 ～5 302-8011-00 Ceramic Capacitor C1,2,4,5,12～14,16 CC14CH1H101JS 100pF/50V ｵｰﾃﾞｨｵｺﾈｸﾀｼﾞｬｯｸ 磁 器ｺﾝﾃﾞﾝｻ Connector Ass'y 309-2269-04 Electrolytic Capacitor C3,15 CE04W1E101LXZE 100uF/25V ｺﾈｸﾀAss'y 309-1231-04 ｱﾙﾐ電...
  • Page 8 IV Assembly (713-0014-00) IV Ass'y RELAY2 RELAY3 RELAY5 RELAY6 RELAY1 IC3 IC4 RELAY4 Polyester Capacitor C8,33 CQ922M1H473J-B 0.047pF/50V Connector Jack K1,2 307-2007-00 ｺﾈｸﾀｼﾞｬｯｸ ﾎﾟﾘｴｽﾃﾙｺﾝﾃﾞﾝｻ C13,14,38,39 CQ922M1H101K-B 100pF /50V C22,48 CQ922M1H223J-B 0.022pF/50V Relay RELAY1～6 362-1212-00 ﾘﾚｨ Ceramic Capacitor C20,44 CC14CH1H120JS 12pF / 50V 磁器ｺﾝﾃﾞﾝｻ...
  • Page 9 Mother Bord Assembly (716-0729-00) Ass'y RELAY1 Heat Sink 240-0088-04 IC1,4 UPC24M05AHF ﾋｰﾄｼﾝｸ NJM79M15FA NJM78M15FA Connector Jack 307-2501-00 IC5,6,7 TD62C851P ｺﾈｸﾀｼﾞｬｯｸ TC74HC14P TC74HC132AP Connector Plag K2,16 308-0206-00 ｺﾈｸﾀﾌﾟﾗｸﾞ 308-0610-00 IC Protector F1,3 310-8152-00 308-1206-00 ICﾌﾟﾛﾃｸﾀ F2,4 310-8202-00 K5,6 308-2006-00 K9,10,11,12 308-1026-00 Reray RELAY1 362-1212-00...

  • Page 10: Switch Assembly

    Switch Assembly (716-0730-00) ｽｲｯﾁ Ass'y S5 S7 S6 S8 PC Board 115-1653-00 PCﾎﾞｰﾄﾞ PC Board 115-1667-00 PCﾎﾞｰﾄﾞ PC Board 115-1653-00 Terminal TM1～6 314-0539-04 PC ﾎﾞｰﾄﾞ 115-1667-00 端 子 Flat Cable Holder K2,3 280-9006-00 Rotary Switch S1,3 336-4817-00 ﾌﾗｯﾄｹｰﾌﾞﾙﾎﾙﾀﾞ ﾛｰﾀﾘｰｽｲｯﾁ 336-3903-00 Connector Jack 307-1306-00 Push Switch...
  • Page 11 Volume Assembly (716-0732-00) ﾎﾞﾘｭｰﾑ Ass'y PC Board 115-1659-00 PCﾎﾞｰﾄﾞ Connector Plug 308-0508-00 ｺﾈｸﾀﾌﾟﾗｸﾞ Variable Resistor 575-2026-00 可 変抵 抗 器 Head Phone Assembly (716-0733-00) Ass'y PC Board 115-1660-00 PCﾎﾞｰﾄﾞ Head Phone Jack 302-1204-00 ﾍｯﾄﾞﾎﾝｼﾞｬｯｸ Connector Plug 308-0206-00 ｺﾈｸﾀﾌﾟﾗｸﾞ 308-0311-00 Push Switch 354-1118-00 ﾌﾟｯｼｭｽｲｯﾁ...
  • Page 12 Power Amp Assembly (717-0087-00) Ass'y Q23,24 Q14,15 I C 1 Q10,11 Q18,19 Test Point (T.P.1) Electorlytic C1,8,22,27 CE04W1H471KW 470uF /50V PC Board 115-1649-00 Capacitor C4,9,20,23 CE04W1J471VRE 470uF /63V PCﾎﾞｰﾄﾞ ｱﾙﾐ電解ｺﾝﾃﾞﾝｻ C11,18 CE04W1H471R20E 470uF /50V C12,16 CE04W1E101LXZE 100uF /25V Heat Sink 240-0089-03 CE04W1E100ROA 10uF / 25V...
  • Page 13 Power Sapply Assembly (719-0058-00) Ass'y C8 K4 Connector Plug 308-0308-00 Polyester Film Capacitor C5,7 CF922MF2E103KDAZ 0.01uF/250V ｺﾈｸﾀﾌﾟﾗｸﾞ 308-0608-00 ﾎﾟﾘｴｽﾃﾙｺﾝﾃﾞﾝｻ CF922MF2E104KDAZ 0.1uF /250V 308-0411-00 308-0321-00 Silicon Diode S10VB20 ｼﾘｺﾝﾀﾞｲｵｰﾄﾞ Electorlytic Capacitor C1～4,8～11 CE692WG1H103BAQ 10000uF/50V ｱﾙﾐ電解ｺﾝﾃﾞﾝｻ Protection Assembly (720-0075-00) ﾌﾟﾛﾃｸｼｮﾝ Ass'y RELAY1 RELAY2 Connector Plug 308-0212-00...

  • Page 14: Receiver Assembly

    Logic Assembly (721-0081-00) Ass'y Transistor 2SA1048-GR IC Soket 300-1101-00 ICｿｹｯﾄ ﾄﾗﾝｼﾞｽﾀ Connector Jack 307-0410-00 Q2,5,6,9 2SK2541 ｺﾈｸﾀｼﾞｬｯｸ 307-0912-00 Q3,4,7,8 2SK330-Y 307-1305-00 Electorlytic Capacitor C2 CE04W1H010VK /25V Connector Plug 308-2501-00 ｱﾙﾐ電 解ｺﾝﾃﾞﾝｻ CE04W1C471VK 470uF/50V ｺﾈｸﾀﾌﾟﾗｸﾞ C9,10,11,12 CE04W1C220VRE 22uF /50V Crystal XTAL1 527-0025-00 Ceramic Capacitor C1,3,4,6,7,8...

  • Page 15: Display Assembly

    Display Assembly (723-0116-00) ﾃﾞｨｽﾌﾟﾚｲ Ass'y D1 ～8 BR1111R-B/C/D/E PC Board 115-1654-00 PCﾎﾞｰﾄﾞ Connector Plug 308-0905-00 ｺﾈｸﾀﾌﾟﾗｸﾞ Metar Lamp Assembly (723-0117-00) ﾒｰﾀﾗﾝﾌﾟ Ass'y X3 X4 Q1,2 2SK2541 Pilot Lamp PL1～4 176-4501-10 ﾊﾟｲﾛｯﾄﾗﾝﾌﾟ Electorlytic Capactor CE04W1V470VK 47uF /35V ｱﾙﾐ 電解ｺﾝﾃﾞﾝｻ Connector Plgu 308-0609-00 ｺﾈｸﾀﾌﾟﾗｸﾞ...

  • Page 16: Service Information

    No.E-550-001 Service Information Accuphase Laboratory Inc. Issued 2005-12-09 MODEL : E-550 機 種 SUBJECT ；An input change cannot be made in a LINE BAL position. 項目 ：LINE BAL位置にて入力切替出来ず Details ; Balance Input Amp Ass'y; since the through hole of a connector K2/4 pin is poor, it connects by a jumper wire.
  • Page 17 No. E550-002 Service Information Accuphase Laboratory Inc. Issued 2006- 2- 2 MODEL : E-550 機 種 SUBJECT : Right-and-left of VI Ass'y Attachment position . 項 目 ： VI Ass'y の左右逆 取付位置 Details ; Keep attention that the position of VI Assembly serves as a right-and-left contrary in this unit.
  • Page 18 No. E550-003 Service Information Accuphase Laboratory Inc. Issued 2006- 3-25 MODEL : E-550 SUBJECT : The measure against a noise in a volume specification position . 項 目 ： ボリューム特定位置でのノイズ対策 The noise by IC fault may be produced in the specific position of Details ;...
  • Page 19 Notes. ※1. Internal input resistance of volt-ohm meter should be higher than 10k-ohms. テスターは、入力抵抗 10kΩ以上のものをお使い下さい。 ※2. Adjustments should be made in case of the PC Board or Transistors being changed. 調整は PCボードあるいはトランジスタを交換した場合に行って下さい。 ※3. Afer feeding 1～10watts output for about 15 minutes,check bias adjustments again. 出力1～10ﾜｯﾄ前後で通電動作させた後、ﾊﾞｲｱｽ電流を再ﾁｪｯｸする。...
  • Page 20 The unit can be used with differnt voltage of 100V,120V,230V. (Use the Japanese domestic model at 100V only, and never change the voltage in Japan.) Refer the photo and illustration for the wiring on the junction terminal as shown below, and have to select the correct fuse and power supply cord.
  • Page 21 Cover 保護ｶﾊﾞ (810-4545-04) Top Board 天地 当板 (803-0033-14) Accessories Case 付属品ｹｰｽ (801-0250-20) Cover for AC Cord 保護ｶﾊﾞ/電源ｺｰﾄﾞ Top Pad (R) (810-2030-04) ﾄｯﾌﾟﾊﾟｯﾄﾞ(R) (803-0390-00) Battery :R03/UM-4 電 池 / 単4型 (569-0006-00) Top Pad (F) ﾄｯﾌﾟﾊﾟｯﾄﾞ(F) (803-0389-00) Cover 保 護ｶﾊﾞ Poly Bag for Owner's Manual (810-4843-04) ﾋﾞﾆｰﾙ袋...
  • Page 22 E - 5 5 0 M A S T E R C I R C U I T D I A G R A M Input selector Ass'y Display Ass'y 716-0734-00 723-0116-00 Attention mark indicating critical components for safety. Replacement must be made with identical parts of specified part number. VI Ass'y(L) VI Ass'y(R) IV Ass'y...
  • Page 23 B A L A N C E I N P U T A M P A S S ' Y ( 7 1 2 - 0 0 9 7 - 0 0 ) IC2A NJM5532D-D +15V +15V 100p 100p +12V -15V 302-8011-00 BAL_L...
  • Page 24 V I A S S ' Y ( 7 1 3 - 0 0 1 3 - 0 0 ) EN IO IC14A 220p IC14B NJM2119D NJM2119D +15V -15V /LAT 499F 499F -15V +15V -15V +15V 220p 3.3k 2.2u 2.2u 2.2u +15V -15V...
  • Page 25 I V A S S ' Y ( 7 1 3 - 0 0 1 4 - 0 0 ) 4.7k 4.7k 22u 16V 22u 16V 220u 10V 220u 10V -15Va -15Vb 4.7k 4.7k 1.33kF 1.33kF +15Va +15Vb 0.5W 1.33kF 0.5W DG441CJ DG441CJ...
  • Page 26 H E A D P H O N E A S S ' Y V O L U M E A S S ' Y I N - R U S H P R O T E C T O R A S S ' Y ( 7 1 6 - 0 7 3 2 - 0 0 ) ( 7 1 6 - 0 7 3 3 - 0 0 ) D t y p e...
  • Page 27 M O T H E R B O R D A S S ' Y ( 7 1 6 - 0 7 2 9 - 0 0 ) to Protection (K4) to Balance Input (K2) from IO Relay (K3) to IO Relay (K2) 308-1026-00 308-1026-00 308-2006-00...
  • Page 28 R E C E I V E R A S S ' Y ( 7 2 1 - 0 0 8 2 - 0 0 ) 307-3204-00 OPTION1 NJL62H380A SDPW3DG0B0-J 1.8k 2SC2458_ 47u 6.3V MA165 RN1204 RELAY1 362-1202-00 308-0407-00 MA165 from Meter Lamp (K4) RN1204 RELAY2...
  • Page 29 P O W E R A M P A S S ' Y ( 7 1 7 - 0 0 8 7 - 0 0 ) +42V 60mV 100n 308-0221-00 42.1v 43.6v +42V +44V 2SA1145_ 2SA1145_ 470u 470u 34.5v 2SC2705_ 2SC2705_ 470u 5.6n...
  • Page 30 P R O T E C T I O N A S S ' Y D I S P L A Y A S S ' Y to Speaker terminals ( 7 2 0 - 0 0 7 5 - 0 0 ) ( 7 2 3 - 0 1 1 6 - 0 0 ) to Power amp Ass'y K3 to Rectifier K2...
  • Page 31 L O G I C A S S ' Y ( 7 2 1 - 0 0 8 1 - 0 0 ) IC3 M93C46-WBN6P to Switch (K1) to Meter Lamp (K2) to Input Sel (K1) CS_EEP LB1642 307-1305-00 SK_EEP DI_EEP 100n DO_EEP...

  • Page 32: Block Diagram

    BLOCK DIAGRAM - 31 -...

  • Page 33: Specifications

    ﾘﾓｺﾝ方式 ：赤外線ﾊﾟﾙｽ方式 Remote control principle: lnfrared pulse 電源 ：DC3V ・ 乾電池単4型2個使用 Power supply: 3VDC(IEC R03 batteries×2) 最大外形寸法 ：56mm×75mm×26mm Maximum dimensions: 56mm×75mm×26mm 質料 ：153g (乾電池含む) Mass: 153g(including batteries) ACCUPHASE LABORATORY INC. 042006 861-3154-00 2-14-10 SHIN-ISHIKAWA, AOBA-KU, YOKOHAMA, JAPAN Printed in Japan...

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