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Precision Preamplifire

C-2810

Service Information

STARTING WITH SERIAL No. F6Y001

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。

Authorized Technical Service Only

サービス資格のある技術者が使用して下さい

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。

CAUTION /

注意

C-2810

Schematic Diagram

回 路 図

Summary of Contents for C-2810

Page 1: ...al parts of special part number Authorized Technical Service Only These servicing instructions are for use by qualified personnel only To reduce the risk of electric shock do not perform any servicing...

Page 2: ...Hexa Nut 633 2032 02 Wooden Cabinet 101 0022 00 Spacer 250 1190 04 Bottom Plate 155 0082 02 Foot 238 0023 00 Sub Panel 134 0157 03 Head Phone Jack 302 1205 00 Head Phone Ass y Ass y 716 0757 00 Fixed...

Page 3: ...Frame 113 0123 04 E ring 647 1054 00 6 Wooden Cabinet 101 0022 00 1pce 1pce 1pce 2pcs 2pcs 2pcs 1pce 1pce 1pce 1pce 1pce 7 Panel Name Plate 180 1103 03 8 Push button 389 5085 02 TONE MC LOAD PHASE MO...

Page 4: ...f special part number Attenuator Assembly Ass y 716 0752 00 VI 1 Assembly 713 0015 00 Filter Amp Assembly Ass y 714 0026 00 Mother Board Assembly Ass y 716 0747 00 Voltage Selector Assembly Ass y 716...

Page 5: ...55 00 Tact Switch Assembly Ass y 716 0756 00 Display Assembly Ass y 723 0125 00 Selector LED Assembly LED Ass y 723 0126 00 Push Button for POWER 388 5062 03 Frame 113 0123 04 Coil Spring 285 1016 04...

Page 6: ...ial Description PC Board for Balance Input Assembly Balance Output Assembly Recording Amp Assembly VI 1 Assembly VI 2 Assembly VI 3 Assembly VI 4 Assembly IV Assembly Mother Board Assembly IO Relay As...

Page 7: ...lyester Film Capacitor C5 13 CF922MF2E473KDAZ 0 47uF 250V Carbon Film Resistor R1 26 29 30 RD142EA220JFS 22 1 6W R10 11 RD142EA331GFS 330 1 6W R37 RD142EA102GFS 1k 1 6W R38 RD142EA511GFS 510 1 6W Meta...

Page 8: ...405 CC725CH1H220J16T 20pF 50V Capacitor C108 208 308 408 CK725B1E223M16T 0 022pF 50V Fuse Resistor R118 119 218 219 RF73B2A220J T 22 1 8W 318 319 418 419 Metal Film R101 104 RN142CK1240F 124 1 6W Res...

Page 9: ...C302 Q102 Q103 Q104 Q201 Q202 Q203 Q204 Q301 IC202 Q302 Q303 Q304 Q401 Q402 Q403 Q404 IC402 Q105 Q205 Q305 Q405 Heat Sink 240 1065 04 VI 2 Assembly 713 0016 00 K1 Q101 IC102 IC302 Q102 Q103 Q104 Q201...

Page 10: ...RK73K1J242JE T 2 4k 1 10W Q4 IC1 Q7 Q10 Q1 Q3 Q8 Q11 IC2 Q2 Q9 Q6 VI 4 Assembly 713 0018 00 K1 Q101 IC102 IC302 Q102 Q103 Q104 Q201 Q202 Q203 Q204 Q301 IC202 Q302 Q303 Q304 Q401 Q402 Q403 Q404 IC402...

Page 11: ...stor R2 RK73K1J222JE T 2 2k 1 10W R3 13 RK73K1J161JE T 160 1 10W R4 7 8 15 21 25 26 33 RK73K1J333JE T 33k 1 10W R5 6 9 10 23 24 27 28 RK73K1J220JE T 22 1 10W R12 RK73K1J183JE T 18k 1 10W R14 RK73K1J10...

Page 12: ...C9 12 CE04W1C221CAE 220uF 16V Electrolytic Capacitor C33 37 39 43 CE04W1E561LXVE 560uF 25V C34 36 40 44 CE04W1E471LXV 470uF 25V C35 38 41 42 CE04W1H220CAE 22uF 50V R1 2 3 4 RD142CA333J 33k 1 6W R5 6...

Page 13: ...AY8 RELAY7 RELAY6 RELAY5 RELAY14 RELAY3 RELAY2 RELAY1 C1 Connector Board Assembly 716 0750 00 Ass y PC Board 115 1709 10 PC Connector Plug K1 308 3205 00 Connector Jack K2 3 307 3206 00 Carbon Film Re...

Page 14: ...10 PC Connector Plug K1 308 0209 00 Push Switch S1 354 1116 00 PC Board 115 1712 10 PC Fuse Holder FH1 2 306 2001 00 Power Push Switch S1 354 1024 00 PC Board 115 1713 10 PC Connector Plug K1 2 308 0...

Page 15: ...embly 723 0126 00 LED Ass y Input Selector Assembly 716 0758 00 Ass y PC Board 115 1717 10 PC Connector Jack Assembly K1 309 3408 04 Ass y Rotary Switch S1 339 0002 00 K1 S1 K1 Tact Switch Assembly 71...

Page 16: ...ilm Resistor R17 30 35 38 41 RD142CA103J 10k 1 6W 42 47 50 51 52 R18 RD142CA105J 1M 1 6W R20 33 36 45 48 RD142CA100J 10 1 6W R23 28 RD142CA162J 1 6k 1 6W R29 32 RD142CA220J 22 1 6W R31 RD142CA104J 100...

Page 17: ...Assembly Ass y 716 0754 00 D 100V U T 120V E 230V K 220V Power Switch 354 1024 00 Connector Setting 100V D K3 T2A L 250V 310 1202 00 680 1204 00 120V U T K4 T2A L 250V 310 1202 00 680 2402 00 230V E K...

Page 18: ...ad 803 0314 00 Cover 810 1740 04 Manual 820 3212 00 Wrench 279 0001 00 Bottom Pad R R 803 0376 00 Top Pad F F 803 0373 00 Accessories Case 801 0270 00 OPTION Cover 810 0930 04 Remote Commander RC 200...

Page 19: ...k and prevented into the back portion Convex portion of a panel Preparation Parts Sticker 180 9243 04 4pse From a panel end 1mm width is taken and a sticker is stuck on 4 places 1mm 4 The back portion...

Page 20: ...ired from 3rd 4th from K4 right and K10 is wired from 7 8th K4 3 4 K9 K26 7 8 K10 Wire 80mm Countermeasure level L 22 A wire is cut at the root of Ass y Ass y The screw of the wire attached on the pan...

Page 21: ...Preparation Parts Mylar tape length 5mm 1pce 5mm Service Information Selctor LED Ass y LED Ass y 723 0126 00 Through hole Mylar Tape An electrical connection is in plating of a panel base A mylar tap...

Page 22: ...e the position of volume is going up is prevented ON Service Information Countermeasure level L 23 Lch IV Ass y is removed from a main part and 6 7pin and 10 11 pin of IC2 are short circuited with sol...

Page 23: ...Set to ALL and press ATT for 2 seconds OUTPUT ALL ATT 2 A setup of a Factory Shipping position GainDisp The amount of attenuation which set Volume Max to 0dB is displayed Max 0dB A gain is displayed T...

Page 24: ...h K5 K2 K4 K1 Logic Ass y K3 721 0083 K1 K2 K3 Display Ass y 723 0125 K2 Tact Switch Ass y K1 716 0756 K1 Switch Ass y 716 0755 K1 ATT Ass y 716 0752 K1 Input Selector Ass y 716 0758 K1 Selector LED A...

Page 25: ...R1 27k R16 3 6k R18 3 6k R11 7 6 5 IC1B OPA2227UA 3 3k R37 3 3k R36 BL Q20 2SA1312_ BL Q14 2SC3324_ 100 R24 Q15 Q16 Q17 Q21 Q22 Q23 100 R7 100 R6 100 R8 BL Q11 2SA1312_ BL Q4 2SC3324_ 100 R9 Q3 Q2 Q1...

Page 26: ...3902_ 22 R18 22 R7 D6 1SS387 D1 1SS387 BL Q15 2SC3324_ BL Q6 2SA1312_ 22 R17 22 R9 4 7k R22 4 7k R6 15V 15V 331G R11 47 R20 100k R19 D E Q17 2SA1085_ D E Q2 2SC2547_ D E Q18 2SA1085_ D E Q20 2SC2547_...

Page 27: ...4570G2 7 6 5 IC1B UPC4570G2 10 R40 10 R14 10 R50 10 R6 10 R58 10 R32 22 R45 22 R22 22 R62 22 R21 22 R27 22 R24 22 R44 22 R1 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 26 from MOTHER K...

Page 28: ...2 NJU7301M D E Q201 2SA1085_ D E Q202 2SC2547_ 22k R208 22k R207 22 R206 22 R205 22u 25V C207 22u 25V C206 470k R215 470k R214 15V 15V 100k R216 2 4k R217 VCC 22p C205 x2 x2 D E Q103 2SA1085_ D E Q104...

Page 29: ...10k R3 D E Q3 2SC2547_ D E Q2 2SA1085_ S Y Q10 2SK330_ S Y Q9 2SK330_ 22n C10 22n C9 4 7 R9 4 7 R8 S Y Q8 2SK330_ S Y Q7 2SK330_ S T Q1 2SC3902_ S T Q4 2SA1507_ 15 R10 15 R7 4 7u 160V C5 4 7u 160V C4...

Page 30: ...R7 33k R4 22 R6 22 R5 D3 1SS387 D2 1SS387 2 2k R2 160 R3 2 2n C2 10k R1 100u 16V C10 100u 16V C4 100u 16V C9 100u 16V C3 15V 15V 100u 16V C11 120u 6 3V C8 1k R18 1u 50V C1 10k R11 1u 50V C7 D1 1SS387...

Page 31: ...RK 12 F 5 GA 13 G 6 H 7 H 9 IC5 TC74HC595AP SI 14 A 15 B 1 SK 11 C 2 SC 10 D 3 E 4 RK 12 F 5 GA 13 G 6 H 7 H 9 IC8 TC74HC595AP SI 14 A 15 B 1 SK 11 C 2 SC 10 D 3 E 4 RK 12 F 5 GA 13 G 6 H 7 H 9 IC1 TC...

Page 32: ...5VL BGNDL AGNDL 15VL AD_L AD_R 15VR AGNDR 15VR NC 5 5V VCC GND CLK DIN BGNDR BGNDR BGNDL BGNDL 15VR 15VR 15VL 15VL AGNDL AGNDL AGNDR AGNDR 15VR 15VR 15VL 15VL AD_L AD_L AD_R AD_R 5 5V 5 5V 5 5V 5 5V V...

Page 33: ...E D6 BR1111R B C D E D7 BR1111R B C D E D8 BR1111R B C D E D9 BR1111R B C D E 1 2 3 4 5 6 K1 280 9006 00 560 R1 560 R3 560 R2 from LOGIC K1 AC Input CT AC Input AGND 15V AGND 15V 1 2 F1 310 8251 00 1...

Page 34: ...4 5 6 K7 308 0622 00 1 2 3 4 5 6 K8 308 0622 00 LAT X1 RN1202 EN 1A 1B 2A 2B 3A 3B 4A 4B 5A 5B 6A 6B 7A 7B 8A 8B 9A 9B 10A 10B 11A 11B 12A 12B 13A 13B 14A 14B 15A 15B 16A 16B K9 308 3205 00 1A 1B 2A...

Page 35: ...10 IC8 LB1642 D9 MA165 D10 MA165 D3 MA165 D4 MA165 D8 MA165 100n C15 100n C16 47k R22 47k R21 10k R17 1M R18 5 6k R1 1 2 3 IC10A TC74VHC00F 12 13 11 IC10D TC74VHC00F 4 5 6 IC10B TC74VHC00F 9 10 8 IC10...

Page 36: ...HPCE1 BLANK HPRST VCC D7 SEL2610C LED_ATN VCC D5 SEL2610C VCC VCC D3 SEL2610C VCC D2 SEL2610C VCC D1 SEL2610C VCC D6 SEL2610C VCC 100n C3 D8 HZ3CLL D9 SDPW3DG0B0 J GR Q1 2SC2458_ VCC VCC 100n C4 3 3k...

Page 37: ...BLOCK DIAGRAM...

Page 38: ...Hz 6dB 20kHz 10Hz 18dB octave 20dB 8 100 AC100V 50 60Hz 43W 477mm 156mm 412mm AD 2800 414 21 6kg AD 2800 22 5kg RC 200 DC3V 4 2 56mm 175mm 26mm 153g Rated Output Voltage BALANCED UNBALANCED OUTPUT 2V...

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