Cambridge-640A-int-sm维修电路原理图.pdf

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1、Gallery Court Hankey Place London SE1 4BB UK Tel: +44 (0)20 7940 2200 Fax: +44 (0)20 7940 2233 640A Integrated Amplifier Issue Date: 16th December 2003 (Revised May 2008) SERVICE MANUAL AP14676/1 SPECIFICATIONS: Power Output: 65 watts into 8 Ohms100 watts into 4 Ohms Input Impedance: 47k OhmsLoudspe

2、aker Impedance: 4 to 8 OhmsLine: 380mVPhono (using optional phono stage): 1.75mVTotal Harmonic Distortion (into 8 Ohms 80% rated power): 0.005% THD (No weighting) 1kHz 0.003% THD (A weighted) 1kHz 0.01% THD (No weighting) 20Hz - 20kHz Frequency Response: 5Hz to 50kHz +/- 1dBBass: +/- 10dB 100HzTrebl

3、e: +/- 10dB 10kHzSignal to Noise Ratio (No weighting): 92dBSlew rate (into 8 ohms): 40V/uSMax. Power Consumption: 615 wattsDimensions (mm): 430 x 320 x 100Weight: 7 kg/15.4 lbsRadioFans.CN 收音机爱 好者资料库640A SERVICE MANUALTABLE OF CONTENTS Safety Precautions & Important Notes 3Amplifier Bias Set-up 4Mai

4、n Assembly BOM (Silver Unit) 5 7 Input & Tone PCB Schematic (Tone Control) 8Revised: Input & Tone PCB Schematic (Input Select) 9 Input & Tone PCB Layout (Top Side) 10Input & Tone PCB Layout (Bottom Side) 11Input & Tone PCB BOM 12Front Panel Schematics 13Front Panel PCB Layout (Top Side) 14Front Pane

5、l PCB Layout (Bottom Side) 15Front Panel PCB BOM 16Power Amp Schematic (Power Supply) 17Power Amp Schematic (Protection) 18Power Amp Schematic (Left Channel) 19Power Amp Schematic (Right Channel) 20Power Amp PCB Layout (Top Side) 21Power Amp PCB Layout (Bottom Side) 22Power Amp PCB BOM 23 25 Speaker

6、 Output Schematic 26Speaker Output PCB Layout (Top Side) 27Speaker Output PCB Layout (Bottom Side) 28Speaker Output PCB BOM 29Mains Input Schematic 30Mains Input PCB Layout (Top Side) 31Mains Input PCB Layout (Bottom Side) 32Mains Input PCB BOM 33IC Pin Layout Details 34 38 Silver / Black Difference

7、 BOM 39Amended Input Circuit Schematic (Jan 2004) 40Amended Input Circuit Schematic (March 2005) 41RadioFans.CN 收音机爱 好者资料库SAFETY PRECAUTIONS & IMPORTANT NOTES SAFETY PRECAUTIONS & IMPORTANT NOTES 1.Check that the rear of the product indicates the correct supply voltage for you area. 2. The lighting

8、flash with the arrowhead within an equilateral triangle is intended to alert the user or service agent to the presence of dangerous voltages within the product enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. 3. The exclamation point within an equilate

9、ral triangle is intended to alert the user or service agent to the presence of important operating and maintenance (Servicing) instructions in the literature accompanying the appliance. 4. This product complies with EEC Low Voltage (73/23/EEC) and Electromagnetic Compatibility (89/336/EEC) Directive

10、s when used and serviced in accordance with this manual. For continued compliance all components marked safety and EMC critical must only be replaced by Cambridge Audio approved parts. 5. Any unauthorised design alterations or additions will void the manufacturers warranty; furthermore the manufactu

11、rer cannot accept responsibility for personal injury or property damage resulting therefrom. 6. When servicing, care should be taken to observe the original routing and dressing of the leads and it should be confirmed that they have been returned to normal after re-assembly. Notes on chip component

12、replacement Never reuse a component that has been removed from a PCB Notice that the minus side of a tantalum capacitor may be damaged by heat COPYRIGHT NOTICE. COPYRIGHT NOTICE. 2005 Audio Partnership PLC. All rights reserved. Cambridge Audio and Azur are registered trademarks of Audio Partnership

13、PLC. This document may not be reproduced, distributed, transmitted, displayed, published, or broadcast without the express written prior permission of Audio Partnership PLC. Alteration or removal of any trademark, copyright, or other notice from this content is prohibited.Information provided in thi

14、s document is provided solely for the use of official service agents in repairing and servicing Audio Partnership PLC products.Cambridge Audio Azur 640A Amplifier Bias SetupTo set the bias on the 640A Amplifier: Measure the voltage across R22 and R100 (Left channel) individually; they should be adju

15、sted using Preset R116 so that the voltage measured on each resistor is greater than 13mV. This procedure should then be repeated for the Right channel by measuring the voltage across R52 and R69 whilst adjusting Preset R68 so that the voltage measured on each resistor is greater than 13mV. 4AP13133

16、/6AP PART No.DRAWING NODESCRIPTIONQTYCOMMENTSNEW CAMBRIDGE AMP PACKED UK VERSION1AP13074/1POLY ENDCAP PACKAGING2AP13075/1CARTON PACKAGING W/HANDLE1PRINTED TO ARTWORK APAP136131/1CAMBRIDGE AUDIO NON-WOVEN BLUE BAG FOR REMOTE1PACK REMOTE CONTROL INSIDE, CAMBRIDGE NEW STYLE REMOTE COMPLETE 1MOUNTED INT

17、O POLY ENDCAP PACKING IN REBATE PROVIDEDAAA ALKALINE BATTERIES3FOR REMOTE. PLACE IN INSTRUCTION MANUAL POLYBAGPY540AP13969/1AMPLIFICATION INSTRUCTION MANUAL1AP13933/2CARTON LABEL (MODEL NO.) UK Silver1FOR BOXSERIAL NUMBER LABEL, BLANK (6.5X35.5mm)31 X REAR PANEL, 1 X BOX, 1 X SHIPPING CARTONISO 9002

18、 LABEL1AFFIXED TO REAR PANEL ABOVE IEC SOCKETAP10087/2MADE UNDER LICENCE IN PRC STICKER1AFFIXED TO REAR PANEL BELOW IEC SOCKETPOLYBAG 173X260X4C mm1FOR INSTRUCTION MANUALOWNERS CERTIFICATE AND REMOTE BATTERIESAP13611/1CAMBRIDGE AUDIO NON-WOVEN BLUE BAG 120mm HEIGHT1PACK AMP UNIT INSIDE1830mm AC IEC

19、POWER CORD SET BS STANDARD FUSED 3 AMP1MUST BE BS APPROVEDRED TAPE SEAL FOR CAMBRIDGE CARTON1NEW CAMBRIDGE AMP UK VERSION ASSEMBLED & TESTED1FRONT PANEL ASSEMBLYPY592AP10209/3CAMBRIDGE SELECTOR KNOB MK33AP10224/1CAMBRIDGE KNOB INSERT MK23INSERT INTO SELECTOR KNOBSPY590CAMBRIDGE NEW RANGE AMP VOLUME

20、KNOB1PY581AP12740/2CAMBRIDGE NEW RANGE AMP FRONT PANEL (PUNCHED AND PRINTED)1SCREENED WITH ARTWORK AP13679/2AP12935/1CAMBRIDGE NEW RANGE AMP IR LENS1GLUED IN PLACE ON THE FRONT PANELAP12746/2CAMBRIDGE NEW RANGE AMP SUB PLATE1FASTENEND IN PLACE INBETWEEN THE LEDGES ON THE FRONT PANELAP12931/1CAMBRIDG

21、E NEW RANGE AMP LIGHTGUIDE5FASTEN TO SUBPLATEM3 X 6 POZI PAN STP SCREW5AFFIXES LIGHTGUIDES TO SUBLATEM3 X 6 C/S POZI MACHINE SCREW8FASTEN THE SUB PLATE TO THE FRONT PANELAP11782/1OPUS CONTROL BOX BUTTON1POSITION IN PLACE ON THE FRONT PANELAP13585/1CAMBRIDGE NEW RANGE AMP 9mm TAC SWITCH CUSHION1POSIT

22、ION ON THE SUBPLATE OVER THE POWER BUTTON CUT AND AFFIX USING ADHESIVE PROVIDED ON THE CUSHION.AP12925/1CAMBRIDGE NEW RANGE AMP 7mm TAC SWITCH BUTTON6POSITION IN PLACE ON THE FRONT PANELAP12934/1CAMBRIDGE NEW RANGE AMP 7mm TAC SWITCH CUSHION6POSITION ON THE SUBPLATE OVER THE POWER BUTTON CUT AND AFF

23、IX USING ADHESIVE PROVIDED ON THE CUSHION.AP12926/2CAMBRIDGE NEW RANGE AMP 7mm PUSH SWITCH BUTTON2POSITION IN PLACE ON THE FRONT PANELCONTROL PCB ASSEMBLY (FRONT PANEL SWITCH PCB)M3 X 6 POZI PAN MACHINE SCREW10USED FOR FIXING THE CONTROL PCBS TO THE SUBPLATE STANDOFFSAP13388/3A600 FRONT PANEL PCB CA

24、BLE1CONNECTS TO FRONT PANEL SWITCH PCB AND RUNS ALONG FRONT PANEL CONNECTING THE SWITCH PCB TO THE POWER SWITCH AND THE IR PCBSCambridge Azur 640A Amplifier (Main Assembly BOM Silver Unit)5AP PART No.DRAWING NODESCRIPTIONQTYCOMMENTSAP13453/2A600 INPUT PCB TO FRONT PANEL SWITCH PCB1ATTACH FRONT PANEL

25、 PCB TO INPUT PCB AS PER DRAWINGCABLE TIE 2.5mm X 100mm2ATTACH CABLE LOOM TO SUB PANELAP13391/2A600 VOLUME MOTOR CABLE1ATTACH VOLUME POT MOTOR TO FRONT PANEL SWITCH PCBAP13394/2A600 AMP PCB TO FRONT PANEL CONTROL PCB CABLE1ATTACH FRONT PANEL PCB TO AMP PCB AS PER DRAWINGBOTTOM PANEL ASSEMBLYAP12734/

26、1CAMBRIDGE NEW RANGE AMP BOTTOM PANEL1PY541AP12652/2CAMBRIDGE NEW RANGE FOOT MOULDING4POSITION IN PLACE ON BOTTOM PANELPY544AP12883/3CAMBRIDGE NEW RANGE FOOT PAD4AFFIX ON FOOT USING ADHESIVE SURFACEM3 X 6 PLASTITE POZI PAN4AFFIX FEET TO BOTTOM PANEL12.7mm PLASTIC PCB STANDOFF9PUSH SNAP FIT ON BOTTOM

27、 PANELM3 X 6 POZI PAN TAPTITE SCREW12TO AFFIX SUPPORT BRACKETS (POWER AMP ASSEMBLY) TO BOTTOM PANELM4 X 12 POZI PAN MACHINE BOLT2FIX THROUGH EARTHING POINT HOLES ON BOTTOM PANELM4 NUT STANDARD2USED TO FIX ABOVE BOLTSM4 LOCK WASHER2FOR EARTH BOLTSM6 X 60 POZI PAN MACHINE BOLT1USED TO FIX MAIN TRANSFO

28、RMER IN PLACE THROUGH THE BOTTOM PANELAP12629/5230V 194VA TOROID TRANSFORMER1NEOPRENE TRANSFORMER INSULATION WASHERS2TO FIT EITHER SIDE OF TRANSFORMERTRANSFORMER METAL BOTTOM PLATE1TO FIT UNDER BOTTOM PLATE ON M6 BOLTM6 LOCK WASHER 1PLACE ABOVE TRANSFORMER ON M6 BOLTTRANSFORMER METAL TOP PLATE1PLACE

29、 ON TOP OF TRANSFORMERM6 NUT STANDARD1USED TO FIX ABOVE BOLTINPUT PCB ASSEMBLY1FIXES IN THE CORRECT POSITION ONTO THE PLASTIC PCB STANDOFFSAP12715/4BARE INPUT PCB1M2.6 X 6 POZI PAN MACHINE SCREW10TO AFFIX BOTTOM PANEL TO SIDE, FRONT AND REAR PANELSM2.6 X 10 POZI PAN PLASTITE4FIX CORNERS OF BOTTOM PA

30、NEL TO PLASTIC INSERTSSIDE PANEL ASSEMBLY2AP12726/1CAMBRIDGE AUDIO NEW RANGE PRESSED SIDE PANEL (3 RIDGE)2POSITION IN PLACE ON PLASTIC FRONT INSERTSAP12729/1CAMBRIDGE AUDIO NEW RANGE FRONT PLASTIC SUPPORT (3 RIDGE)2POSITION AT FRONT WITHIN SIDE PANELSAP12730/1CAMBRIDGE AUDIO NEW RANGE REAR PLASTIC S

31、UPPORT (3 RIDGE)2POSITON AT REAR WITHIN SIDE PANELSM2.6 X 10 C/S POZI PLASTITE8TO AFFIX SIDE PANELS TO PLASTIC INSERTSA600 REAR PANEL ASSEMBLY1AP12919/2CAMBRIDGE AUDIO NEW RANGE AMP REAR PANEL PRINTED1SCREENED WITH ARTWORK AP13665/2 THEN POSITION ON REAR PLASTIC SUPPORTSM3 X 10 POZI PAN PLASTITE4TO

32、AFFIX REAR PANEL TO REAR PLASTIC INSERTSM3 X 8 POZI PAN PLASTITE9TO FIX SPEAKER TERMINAL PCB AND ALSO FIX PHONO SOCKETS ON THE INPUT BOARD TO THE REAR PANELM4 X 8 POZI PAN TAPTITE2FIXES THE IEC SOCKET MOUNTED ON THE POWER BOARD TO THE REAR PANELM3X12 MACHINE SCREW WITH PLASTIC KNOB AND EXTERNAL TOOT

33、H ZINC WASHER1PHONO GND SCREW ON REAR PANEL6AP PART No.DRAWING NODESCRIPTIONQTYCOMMENTSAP13389/2A600 AMP PCB TO INPUT PCB POWER CABLE1FIT AS PER DRAWING - JST CONNECTORSAP13393/2A600 AMP PCB TO MAINS PCB CABLE1FIT AS PER DRAWING - JST CONNECTORSAP13396/2A600 INPUT PCB TO AMP PCB SIGNAL CABLE1FIT AS

34、PER DRAWING - JST CONNECTORSAP13392/2A600 AMP PCB TO SPEAKER PCB CABLE1FIT AS PER DRAWING - JST CONNECTORSSELF ADHESIVE CABLE TIE FIXING PAD 19mm X 19mm32X SIDE PANEL, 1X REAR PANEL TO ATTACH AP13395/1 LOOM TO SIDE OF CHASSISCABLE TIE 2.5mm X 100mm10(PLEASE FOLLOW EXAMPLE ON MANUFACTURING SAMPLE UNI

35、T OR USE AS NECESSARY)AP13340/1A600 LIDDING TAPE FOR FRONT AND REAR PANELS2FIX TO THE CORRECT SURFACES FOR LID AP13342/1A600 LIDDING TAPE FOR SIDE PANELS2FIX TO THE CORRECT SURFACES FOR LID PY542AP12733/2CAMBRIDGE AUDIO NEW RANGE TOP PANEL WITH VENTS1POSITIONON TOP OF THE PRODUCTPY516M2.6 x 8 M/C To

36、rx Recessed Plated8TOP PANEL SCREWS7Cambridge Audio Azur 640A Integrated AmplifierAP12714/5 Input & Tone PCB Schematic (Tone Control)C1330p polyR122kR24k7R34k7R48k2R118k2C6150n polyC95pSW1:ASW-DPDTDEFEAT-15V+15VR1210kR1310kC10330p polyR2022kR424k7R434k7R448k2R458k2C11150n polyC155pSW1:BSW-DPDTDEFEAT

37、-15V+15VR4610kR4710k-15V+15VC1647n polyC1747n polyC1947n polyC2047n polyC2447n polyC2747n polyC32100u 25VC33100u 25V+15V-15V32184U2:ANE5532567U2:BNE553232184U4:ANE5532567U4:BNE553232184U5:ANE5532567U5:BNE5532R CH INL CH INR CH OUTL CH OUTHEADPHONESW2:ASW-DPDTTAPESW2:BSW-DPDTTAPEJ1TERMINALJ2TERMINALJ

38、3TERMINALJ4TERMINALSPEAKER SWITCHINGRSW1RSW2RLGNDLSW1LSW22431785CN2HEADPHONE JACKJ5TERMINALJ6TERMINALJ7TERMINALC1822pC2122pC2810u 16V NPC2910u 16V NPC3010u 16V NPC3110u 16V NPR52150kR54150kR59150kR60150k132VR1:A20K MOTORISED DUAL POT465VR1:B20K MOTORISED DUAL POT465VR4:BMN20K BALANCE132VR4:AMN20K BA

39、LANCE132VR2:AB20K LINEAR465VR2:BB20K LINEAR132VR3:AB20K LINEAR465VR3:BB20K LINEARR61220R 3W CR62470R 1W CR63220R 3W CR64470R 1W C123456CN3H6 2.54mmTO POWER AMPTo enhance viewing, please print to A38Cambridge Audio Azur 640A Integrated AmplifierAP12714/6 Input & Tone PCB Schematic (Input Select)(Prod

40、uction change in 2003 - if R48/R56 fail, please refer to Service Bulletin: TNBC-0006)CD IN LTUNER IN LDVD IN LAV IN LCD IN RTUNER IN RDVD IN RAV IN RPHONO/AUX IN LPHONO/AUX IN RTAPE OUT2 RTAPE OUT1 RTAPE OUT2 LTAPE OUT1 LTAPE MON LTAPE MONRPREOUT RPREOUT Lstdatclk COPYRIGHTThe Audio PartnershipGalle

41、ry CourtHankey PlaceLONDON SE1 4BBTel : +44 (0)171 940 2200Fax : +44 (0)171 940 22336CN10:DQUAD PHONO3CN11:BQUAD PHONO6CN11:DQUAD PHONO3CN12:BQUAD PHONO54CN10:CQUAD PHONO21CN11:AQUAD PHONO54CN11:CQUAD PHONO21CN12:AQUAD PHONO54CN13:CQUAD PHONO123456CN8HEADER6PHONO I/OLK16CN13:DQUAD PHONO123456CN7HEAD

42、ER6PHONO PSU3CN10:BQUAD PHONO21CN10:AQUAD PHONO32184U6:ANE5532R956RR856R567U6:BNE55323CN13:BQUAD PHONO6CN12:DQUAD PHONO21CN13:AQUAD PHONO54CN12:CQUAD PHONO32184U3:ANE5532567U3:BNE5532-15V+15V+12V-12VLK2R21220KR23220KR24100RR25100RR26100RR27220KR28220KR29100RR30100RR31100RR17220KR32220KR33220KR34100R

43、R35100RR36100RR37100RR38100RR39100RR40220KR41220K+15V-15V+30VC247n polyC347n polyC447n polyC547n polyC747n polyC847n polyC1222pC1322pR6220KR510kR710kR1010kR1410kR15100KR16100KC2510u 16V NPR18100KR19100KC1410u 16V NPR49100RR51100RR53100R Pre OnlyC26100n Pre Only-15V+15V+45V+30VR55680RL CH INR CH INL

44、CH OUTR CH OUTHEADPHONEVEE1L12L23L45L34L-COM16L-COM29L57L68L-COM312L710L811ST13VSS14CK15DATA16R818R719R-COM317R621R522R-COM220R-COM123R325R424R226R127VDD28U1NJU7313R22220KR50220K21CN4:ADUAL PHONO3CN4:BDUAL PHONOLRJ8CHASSIS4321CN1H4 2.54mm4321CN22H4 2.54mmR48100RR56100RD112V Zener 400mWD212V Zener 40

45、0mW+12V-12VC2210u 25VC2310u 25VTo enhance viewing, please print to A39Cambridge Audio Azur 640A Integrated AmplifierAP12714/5 Input & Tone PCB Layout (Top Side)To enhance viewing, please print to A310Cambridge Audio Azur 640A Integrated AmplifierAP12714/5 Input & Tone PCB Layout (Bottom Side)To enha

46、nce viewing, please print to A311Cambridge Azur Input and Tone PCB BOMAP131336AP PART No.DRAWING NODESCRIPTIONQTYDESIGNATORCOMMENTSAP12715/5BARE INPUT PCB1220R 3W CARBON FILM RESISTOR2R61, R63470R 1W CARBON FILM RESISTOR2R62, R64680R 1W CARBON FILM RESISTOR1R5556R 0.25W METAL FILM RESISTOR2R8, R9100

47、R 0.25W METAL FILM RESISTOR14R24, R25, R26, R29, R30, R31, R34, R35, R36, R37, R38, R39, R49, R514k7 0.25W METAL FILM RESISTOR4R2, R3, R42, R438k2 0.25W METAL FILM RESISTOR4R4, R11, R44, R4510k 0.25W METAL FILM RESISTOR8R5, R7, R10, R12, R13, R14, R46, R4722k 0.25W METAL FILM RESISTOR2R1, R20100k 0.

48、25W METAL FILM RESISTOR4R15, R16, R18, R19150k 0.25W METAL FILM RESISTOR4R52, R54, R59, R60220k 0.25W METAL FILM RESISTOR12R6, R17, R21, R22, R23, R27, R28, R32, R33, R40, R41, R505p CERAMIC 50/100V 5mm PITCH CAPACITOR4C9, C1522p CERAMIC 50/100V 5mm PITCH CAPACITOR4C12, C13, C18, C21330p POLY 50/100

49、V 5mm PITCH CAPACITOR2C1, C1047n POLY 50/100V 5mm PITCH CAPACITOR12C2, C3, C4, C5, C7, C8, C16, C17, C19, C20, C24, C27150n POLY 50/100V 5mm PITCH CAPACITOR2C6, C1110u 35V NON POLAR ELECTROLYTIC CAPACITOR6C14, C25, C28, C29, C30, C31100u 25V ELECTROLYTIC CAPACITOR2C32, C33PY487NJU 7313 AUDIO SWITCH

50、IC1U1PY108NE5532 OP AMP5U2, U3, U4, U5, U64 WAY JST CONNECTOR 2.54mm PITCH3CN1, CN226 WAY JST CONNECTOR 2.54mm PITCH1CN3ZUANBAO CK-6.35-08A (SILVER BEZEL) HEADPHONE JACK1CN2ZUANBAO AV2-8.4-9 GOLD DUAL PHONO SOCKET1CN4ZUANBAO AV4-8.4-9 GOLD QUAD PHONO SOCKET4CN10, CN11, CN12, CN136 WAY PIN HEADER 2.5