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Authorized Technical Service Only
サービス資格のある技術者が使用して下さい
Precision Preamplifire C-2810
C-2810 Schematic Diagram
CAUTION / 注意
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。
Service Information
STARTING WITH SERIAL No. F6Y001
回 路 図
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Summary of Contents for Accuphase C-2810
- Page 1 Service Information STARTING WITH SERIAL No. F6Y001 Authorized Technical Service Only サービス資格のある技術者が使用して下さい Precision Preamplifire C-2810 回 路 図 C-2810 Schematic Diagram CAUTION / 注意 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 （外観部品） ★ Decoration Screw ★ Front Glass Knob for VOLUME 飾りﾈｼﾞ/2pcs. ﾌﾛﾝﾄｶﾞﾗｽ ﾂﾏﾐ (630-0307-14) (172-0141-03) (381-4501-14) Washer ﾜｯｼｬ/2pcs. (637-9045-04) Hexa Nut/六角ﾅｯﾄ (633-2032-02) 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) ★ Push-button for Opener ﾌﾟｯｼｭﾎﾞﾀﾝ/ 開閉ﾎﾞﾀﾝ...
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Page 3: Front View
FRONT VIEW ( 前面 Knob for INPUT Knob for VOLUME ﾂﾏﾐ /ｲﾝﾌﾟｯﾄ ﾂﾏﾐ /ﾎﾞﾘｭｰﾑ (381-4503-04) (381-4501-14) Head Phone Jack ﾍｯﾄﾞﾎﾝｼﾞｬｯｸ Knob /ﾂﾏﾐ (302-1205-00) OUTPUT,BASS,TREBLE,AD,REC,BAL/6pcs. (384-1405-04) 1 Front Panel=131-0190-01 1pce. 7 Panel Name Plate=180-1103-03 1pce. ﾌﾛﾝﾄﾊﾟﾈﾙ ﾊﾟﾈﾙﾈｰﾑﾌﾟﾚｰﾄ 2 Sub-panel =134-0157-03 1pce. 8 Push-button=389-5085-02 1pce. - Page 4 TOP VIEW ( 上面 ) IO Relay Assembly IOﾘﾚｨ Ass'y (716-0748-00) Daughter Board Assembly Top Plate ﾄﾞｰﾀｰﾎﾞｰﾄﾞ Ass'y ﾄｯﾌﾟﾌﾟﾚｰﾄ (716-0749-00) (150-0086-03) Power Transformer Top Plate ﾊﾟﾜｰﾄﾗﾝｽ /2pcs. ﾄｯﾌﾟﾌﾟﾚｰﾄ (510-1038-20) (150-0086-03) Connector Board Assembly ｺﾈｸﾀﾎﾞｰﾄﾞ Ass'y Logic Assembly (716-0750-00) ﾛｼﾞｯｸ Ass'y (721-0083-00) VI(3) Assembly VI(2) Assembly...
- Page 5 FRONT VIEW (Sub-chassis side) （サブシャーシ前面図） Rotary Switch/ﾛｰﾀﾘｽｲｯﾁ (339-0002-00) Variable Resistor Step(B)/軸受(B) 可変抵抗器/VR1:10kΩ (283-1016-14) (575-2026-00) Input Selector Assembly Volume Assembly ｲﾝﾌﾟｯﾄｾﾚｸﾀ Ass'y ﾎﾞﾘｭｰﾑ Ass'y (716-0758-00) (716-0751-00) Power Push Switch ﾌﾟｯｼｭｽｲｯﾁ (354-1024-00) Power Switch Assembly Foot ﾊﾟﾜｰｽｲｯﾁ Ass'y Logic Assembly 脚 (716-0753-00) ﾛｼﾞｯｸ...
- Page 6 MISCELLANEOUS( 本体その他使用部品） Description(部品 名) Description(部 品 名) Remarks(備 考) Parts No.(部品No.) Parts No.(部品No.) Remarks(備考) PC Board for Screws for Wooden Cabinet/ｳｯﾄﾞｷｬﾋﾞﾈｯﾄ用 Balance Input Assembly ﾈｼﾞ類 Binding Screw /ﾊﾞｲﾝﾄﾞﾈｼﾞ 604-0416-00 115-1697-00 4×16㎜ 4pcs. Balance Output Assembly Decoration Washer/飾 りﾜｯｼｬ 637-9051-04 115-1698-00 4pcs.
- Page 7 Balance lnput Amp Assembly (712-0098-00) ﾊﾞﾗﾝｽ 入 力ｱﾝﾌﾟ Ass'y Q5 Q19 RELAY3 RELAY2 IC1 Q32 RELAY1 Polypropylene Capacitor C3,11,20,28 CQ93PP2A222JM-F 2200pF/100V Connector Plug 308-3203-00 ﾎﾟﾘﾌﾟﾛﾋﾟﾚﾝｺﾝﾃﾞﾝｻ ｺﾈｸﾀﾌﾟﾗｸﾞ PPS Capacitor CQ922HE1H101JR 100pF / 50V Relay RELAY1,2,3 362-1202-00 PPSｺﾝﾃﾞﾝｻ ﾘﾚｨ Electrolytic C4,8,22,26 CE04W1C220VRE 22uF /16V Transistor...
- Page 8 Recording Amp Assembly (712-0100-00) ﾚｺｰﾃﾞｨﾝｸﾞｱﾝﾌﾟAss'y Carbon Film Resistor R15,16 RD142EA221GFS 220Ω 1/4W Connector Plug 308-3203-00 炭 素皮 膜 抵 抗器 ｺﾈｸﾀﾌﾟﾗｸﾞ Fuse Resistor R1,21,22,24,27 RF73B2A220J-T 22Ω 1/8W Diode D1,2,3,4,5,6 1SS387 ﾌｭｰｽﾞ抵 抗器 44,45,62 ﾀﾞｲｵｰﾄﾞ Metal Film Resistor R2,25,29,43,47,61 RK73K1J361JE-T 360Ω 1/10W UPC4570G2 金...
- Page 9 VI(2) Assembly (713-0016-00) Heat Sink (240-1065-04) Q204 Q301 ﾋｰﾄｼﾝｸ Q303 Q202 Q104 Q401 Q102 Q403 Q404 Q101 Q402 Q103 Q304 Q201 Q203 Q302 IC102 IC402 IC202 IC302 Q105 Q405 Q205 Q305 Heat Sink 240-1065-04 Ceramic C105,205,305,405 CC725CH1H220J16T 20pF / 50V ﾋｰﾄｼﾝｸ...
- Page 10 VI(4) Assembly (713-0018-00) Heat Sink (240-1065-04) Q204 Q301 ﾋｰﾄｼﾝｸ Q303 Q202 Q104 Q401 Q403 Q102 Q404 Q101 Q402 Q103 Q304 Q201 Q203 Q302 IC102 IC402 IC202 IC302 Q405 Q105 Q205 Q305 Heat Sink 240-1065-04 Ceramic C105,205,305,405 CC725CH1H220J16T 20pF / 50V ﾋｰﾄｼﾝｸ...
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Page 11: Power Supply Assembly
Filter Amp Assembly (714-0026-00) ﾌｲﾙﾀｰｱﾝﾌﾟ Ass'y RELAY1 RELAY2 Fuse Resistor R16,17 RF73B2A220J-T 22Ω 1/8W Connector Plug 308-3203-00 ﾌｭｰｽﾞ抵 抗 器 ｺﾈｸﾀﾌﾟﾗｸﾞ Relay RELAY1,2 362-1202-00 Metal Film R1,11 RK73K1J103JE-T 10kΩ 1/10W ﾘﾚｨ Resistor RK73K1J222JE-T 2.2kΩ 1/10W 金 属 混 合皮 膜 R3,13 RK73K1J161JE-T 160Ω... -
Page 12: Mother Board Assembly
Mother Board Assembly (716-0747-00) ﾏｻﾞｰﾎﾞｰﾄﾞAss'y RELAY5 RELAY6 JK10 RELAY3 JK5 JK6 JK7 JK8 JK9 RELAY13 RELAY1 RELAY15 RELAY2 RELAY10 RELAY4 RELAY11 RELAY7 RELAY12 RELAY14 RELAY9 RELAY8 IC11 IC12 IC10 Transistor Q3,5 2SC3902-S/T XLR Audio Plug JK3～6 301-8005-00 ﾄﾗﾝｼﾞｽﾀ Q4,6 2SA1507-S/T ｵｰﾃﾞｨｵｺﾈｸﾀﾌﾟﾗｸﾞ... - Page 13 IO Relay Assembly (716-0748-00) IO ﾘﾚｨ Ass'y RELAY7 RELAY5 RELAY12 RELAY11 RELAY3 RELAY2 RELAY9 RELAY13 RELAY14 RELAY4 RELAY1 RELAY10 RELAY8 RELAY6 PC Board 115-1707-10 Diode D1～14 MA165 PCﾎﾞｰﾄﾞ ﾀﾞｲｵｰﾄﾞ Connector Jack K1,3 307-0808-00 Polyester Capacitor CF922MF2E223KDAZ 0,022uF/250V ｺﾈｸﾀｼﾞｬﾂｸ K2,4 307-0607-00 ﾎﾟﾘｴｽﾃﾙｺﾝﾃﾞﾝｻ...
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Page 14: Power Switch Assembly
Volume Assembly (716-0751-00) ﾎﾞﾘｭｰﾑ Ass'y PC Board 115-1710-10 PCﾎﾞｰﾄﾞ Shield Case/ｼｰﾙﾄﾞｹｰｽ 231-0058-04 Connector Plug 308-0508-00 ｺﾈｸﾀﾌﾟﾗｸﾞ Variable Resistor 575-2026-00 可変 抵 抗器 Attenuator Assembly (716-0752-00) ｱｯﾃﾈｰﾀ Ass'y PC Board 115-1711-10 PCﾎﾞｰﾄﾞ Connector Plug 308-0209-00 ｺﾈｸﾀﾌﾟﾗｸﾞ Push Switch 354-1116-00 ﾌﾟｯｼｭｽｲｯﾁ Power Switch Assembly (716-0753-00) ﾊﾟﾜｰｽｲｯﾁ... -
Page 15: Switch Assembly
Switch Assembly (716-0755-00) ｽｲｯﾁ Ass'y PC Board 115-1714-20 PCﾎﾞｰﾄﾞ Connector Jack 307-1403-00 Q1 Q2 ｺﾈｸﾀｼﾞｬｯｸ 307-2602-00 Q1,2 2SK2541 Rotare Switch 336-5009-00 ﾛｰﾀﾘｽｲｯﾁ S2,4 336-3903-00 S3,5 336-4817-00 Variable Resistor 575-2313-00 可 変 抵抗 器 Carbon Film Resistor RD142CA473J 47kΩ 1/6W 炭 素 皮膜 抵 抗器 R2,3 RD142CA103J 10kΩ... -
Page 16: Display Assembly
Logic Assembly (721-0083-00) ﾛｼﾞｯｸAss'y IC10 Heat Sink/ﾋｰﾄｼﾝｸ (IC1用) 240-2034-10 IC12 XTAL1 IC11 IC Socket (IC7用) 300-1101-00 Q3,4,9,10 2SK2541 ICｿｹｯﾄ Q5,6,7,8 2SK330-Y Connector Plug 308-0407-00 CE04W1H010VK 1uF / 50V ｺﾈｸﾀﾌﾟﾗｸﾞ K2,5 308-3205-00 C2,4 CE04W1A222VK 2200uF /10V Electrolytic Capacitor C3,5,8 CE04W1E102VK 1000uF /25V Connector Jack 307-3001-00 ｱﾙﾐ電解ｺﾝﾃﾞﾝｻ... - Page 17 Caution for AC line Voltage Selection 注意：電源電圧の変更 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 18 PACKING （梱包図） 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 (801-0270-00) 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 (803-0374-00) Poly Bag for Battery ﾋﾞﾆｰﾙ袋 / 電池用 (812-0507-00) Top Pad (F) Battery :R03/UM4 ﾄｯﾌﾟ...
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Page 19: Service Information
No. C-2810-002 Service Information Accuphase Laboratory Inc. Issued 2006-8-1 MODEL : C-2810 SUBJECT : The measure against a crack of the front of a wood-case 項 目 : ｳｯﾄﾞｹｰｽの前面のｷｽﾞ対策 Details ; The contact crack by the structure of the back of front panel and the front of a wood case is prevented. - Page 20 No. C-2810-003 Service Information Accuphase Laboratory Inc. Issued 2007-2-28 MODEL : C-2810 SUBJECT : The measure against hum noise with usingthe head phone. 項 目 : ﾍｯﾄﾞﾎｰﾝ時のﾊﾑﾉｲｽﾞ対策 Details ; The grand line of head receiver Ass'y is deleted and 3 type leads are added to a mother board.
- Page 21 No. C-2810-004 Service Information Accuphase Laboratory Inc. Issued 2007- 3-7 MODEL : C-2810 SUBJECT : Selector LED lighting is not carried out. : ｾﾚｸﾀLED点灯せず 項 目 Details ; Since there is possibility of an electrical connection between Selector LED Assembly and a panel base, it prevents that the LED display of an input position does not light up.
- Page 22 No. C-2810-005 Service Information Accuphase Laboratory Inc. Issued 2007-4-5 MODEL : C-2810 SUBJECT : Noise prevention which is a power supply ON in the state of a main volume raising 項 目 : ﾒｲﾝﾎﾞﾘｭｰﾑ上げた状態での電源ON時のノイズ防止 Details ; The shocking noise when turning on a power supply in the state where the position of volume is going up is prevented.
- Page 23 No. C-2810-006 Service Information Accuphase Laboratory Inc. Issued 2007-7-26 Display/表示 MODEL : C-2810 SUBJECT : Special Operation Mode 項 目 特殊動作モードの設定 Power 電 源 Output Setting items/設定項目 Display/表示 Operation / 操作 Situation /動作状況 OUTPUT:OFF+ATTENUATOR An output is off by head ON/OFF of the output <Set to OFF,and press...
- Page 24 C - 2 8 1 0 M A S T E R C I R C U I T D I A G R A M IO Relay Ass'y 716-0748 IO Relay Ass'y 716-0748 DAUGHTER Board Ass'y 716-0749 T001 510-1038 Mother Board Ass'y 716-0747 IC001...
- Page 25 C-2810 BALANCE INPUT AMP ASS'Y (712-0098-00) < 21.5mA +15V-sig 1SS387 6.8k 6.8k 3.6k 3.3k 2SA1312_ 2SA1312_ 1.2n 100p 2SC3324_ 2SC3324_ 2.2n 0.47u 470n 470n Input- Output- 2.2u 100k 3.3k IC1A 100k OPA2227UA 2SA1312_ 2SA1312_ 3.3k 2.2u 2.2n 1.2n 2SC3324_ 2SC3324_ 3.3k...
- Page 26 C-2810 BALANCE OUTPUT AMP ASS'Y (712-0099-00) < 21.2mA +15V-Out +15V 1SS387 4.7k 100u 100u 1.3k 8.2k 2SA1085_ 3.3k -D/E 2SA1085_ -D/E 2SA1312_ 2SA1085_ -D/E 2SC3324_ 510G -Out Input+ 100u 100k 6.8n 220u 6.3V 470k 2SA1312_ 2SC2547_ -D/E 2SC3324_ /PreOut 2SC2547_...
- Page 27 C - 2 8 1 0 R E C O R D I N G A M P A S S ' Y ( 7 1 2 - 0 1 0 0 - 0 0 ) I N P U T S E L E C T O R A S S ' Y ( 7 1 6 - 0 7 5 8 - 0 0 ) +15V 100u...
- Page 28 C - 2 8 1 0 V I ( 1 ) A S S ' Y ( 7 1 3 - 0 0 1 5 - 0 0 ) 2SC2547_ 2SC2547_ C401 R410 C201 R210 -D/E -D/E C404 C204 100p 100p R415 R215...
- Page 29 C - 2 8 1 0 I V A S S ' Y ( 7 1 3 - 0 0 1 9 - 0 0 ) +15V_IV +15V +15V 220p 4.02kF 100p 8.06kF 100p 7.87kF Input- DG441CY IC1A 100u NJM4580M +12V +12V Input+...
- Page 30 C - 2 8 1 0 F I L T E R A M P A S S ' Y ( 7 1 4 - 0 0 2 6 - 0 0 ) +15V 2SC2547_ 2SC2547_ 2SC2547_ -D/E -D/E -D/E 100u 100u IC1B...
- Page 31 C-2810 MOTHER BOARD ASS'Y (716-0747-00-00) CD Balance Line Balance 301-8005-00 301-8005-00 301-8005-00 301-8005-00 to DAUGHTER K10 JK10 302-8006-00 302-8006-00 302-8006-00 302-8006-00 302-8006-00 302-8006-00 RELAY1 RELAY2 RELAY4 RELAY3 RELAY5 RELAY6 RELAY13 RELAY15 +12VD 362-1202-00 362-1202-00 362-1202-00 362-1202-00 362-1202-00 362-1202-00 362-1202-00 362-1202-00...
- Page 32 C - 2 8 1 0 M O T H E R B O A R D A S S ' Y ( 7 1 6 - 0 7 4 7 - 0 0 - 0 1 ) C 2 8 1 0 C O N N E C T O R B O A R D A S S ' Y ( 7 1 6 - 0 7 5 0 - 0 0 ) 307-3206-00 307-3206-00 IC10C...
- Page 33 V O L T A G E S E L E C T O R A S S ' Y H E A D P H O N E A S S ' Y S E L E C T O R L E D A S S ' Y ( 7 2 3 - 0 1 2 6 - 0 0 ) ( 7 1 6 - 0 7 5 4 - 0 0 ) ( 7 1 6 - 0 7 5 7 - 0 0 ) 308-0432-00...
- Page 34 C - 2 8 1 0 D O U G H T E R B O A R D A S S ' Y ( 7 1 6 - 0 7 4 9 - 0 0 ) to L-ch IO K1 to R-ch IO K1 to L-ch IO K2 to R-ch IO K2...
- Page 35 L O G I C A S S ' Y ( 7 2 1 - 0 0 8 3 - 0 0 ) to TACT SW K2 to DISPLAY K2 RN1204 /LED_C CS_EEP SK_EEP IC4E RN1204 /LED_A SCLK_IO SCLK_IO_BUF DI_EEP 100n DO_EEP TC74VHC14F/EL...
- Page 36 to SWITCH K1 T A C T S W I T C H A S S ' Y ( 7 1 6 - 0 7 5 6 - 0 0 ) 314-0539-04 314-0539-04 314-0539-04 314-0539-04 314-0539-04 314-0539-04 SEL2610C SEL2610C SEL2610C SEL2610C SEL2610C SEL2610C...
- Page 37 BLOCK DIAGRAM （ブロックダイヤグラム） － ３６ －...
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Page 38: Specifications
Power supply : 3V DC (IEC R03 batteries×2) Remote Commander RC-200 / ﾘﾓｰﾄ・ｺﾏﾝﾀﾞｰRC-200 Dimensions : 56 mm (W) × 175 (H) × 26(D) mm Cleaning Cloth /ｸﾘｰﾆﾝｸﾞｸﾛｽ Weight : 153g (including batteries) 0807-100 861-3157-00 ACCUPHASE LABORATORY INC. Printed in Japan 2-14-10 SHIN-ISHIKAWA, AOBA-KU, YOKOHAMA, JAPAN...