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 Ohms 100 watts into 4 Ohms Input Impedance: 47k Ohms Louds

2、peaker Impedance: 4 to 8 Ohms Line: 380mV Phono (using optional phono stage): 1.75mV Total 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 +/- 1dB Bass: +/- 10dB 100H

3、z Treble: +/- 10dB 10kHz Signal to Noise Ratio (No weighting): 92dB Slew rate (into 8 ohms): 40V/uS Max. Power Consumption: 615 watts Dimensions (mm): 430 x 320 x 100 Weight: 7 kg/15.4 lbs RadioFans.CN 收音机爱 好者资料库 640A SERVICE MANUAL TABLE OF CONTENTS Safety Precautions furthermore the manufacturer c

4、annot 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 repla

5、cement 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 PLC.

6、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 this do

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

8、ed 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. 4 AP13133/

9、6 AP PART No.DRAWING NODESCRIPTIONQTYCOMMENTS NEW CAMBRIDGE AMP PACKED UK VERSION1 AP13074/1POLY ENDCAP PACKAGING2 AP13075/1CARTON PACKAGING W/HANDLE1PRINTED TO ARTWORK AP AP136131/1CAMBRIDGE AUDIO NON-WOVEN BLUE BAG FOR REMOTE 1PACK REMOTE CONTROL INSIDE, CAMBRIDGE NEW STYLE REMOTE COMPLETE 1MOUNTE

10、D INTO POLY ENDCAP PACKING IN REBATE PROVIDED AAA ALKALINE BATTERIES3FOR REMOTE. PLACE IN INSTRUCTION MANUAL POLYBAG PY540AP13969/1AMPLIFICATION INSTRUCTION MANUAL1 AP13933/2CARTON LABEL (MODEL NO.) UK Silver1FOR BOX SERIAL NUMBER LABEL, BLANK (6.5X35.5mm)31 X REAR PANEL, 1 X BOX, 1 X SHIPPING CARTO

11、N ISO 9002 LABEL1AFFIXED TO REAR PANEL ABOVE IEC SOCKET AP10087/2MADE UNDER LICENCE IN PRC STICKER1AFFIXED TO REAR PANEL BELOW IEC SOCKET POLYBAG 173X260X4C mm1FOR INSTRUCTION MANUALOWNERS CERTIFICATE AND REMOTE BATTERIES AP13611/1CAMBRIDGE AUDIO NON-WOVEN BLUE BAG 120mm HEIGHT 1PACK AMP UNIT INSIDE

12、 1830mm AC IEC POWER CORD SET BS STANDARD FUSED 3 AMP 1MUST BE BS APPROVED RED TAPE SEAL FOR CAMBRIDGE CARTON1 NEW CAMBRIDGE AMP UK VERSION ASSEMBLED & TESTED 1 FRONT PANEL ASSEMBLY PY592AP10209/3CAMBRIDGE SELECTOR KNOB MK33 AP10224/1CAMBRIDGE KNOB INSERT MK23INSERT INTO SELECTOR KNOBS PY590CAMBRIDG

13、E NEW RANGE AMP VOLUME KNOB1 PY581AP12740/2CAMBRIDGE NEW RANGE AMP FRONT PANEL (PUNCHED AND PRINTED) 1SCREENED WITH ARTWORK AP13679/2 AP12935/1CAMBRIDGE NEW RANGE AMP IR LENS1GLUED IN PLACE ON THE FRONT PANEL AP12746/2CAMBRIDGE NEW RANGE AMP SUB PLATE1FASTENEND IN PLACE INBETWEEN THE LEDGES ON THE F

14、RONT PANEL AP12931/1CAMBRIDGE NEW RANGE AMP LIGHTGUIDE5FASTEN TO SUBPLATE M3 X 6 POZI PAN STP SCREW5AFFIXES LIGHTGUIDES TO SUBLATE M3 X 6 C/S POZI MACHINE SCREW8FASTEN THE SUB PLATE TO THE FRONT PANEL AP11782/1OPUS CONTROL BOX BUTTON1POSITION IN PLACE ON THE FRONT PANEL AP13585/1CAMBRIDGE NEW RANGE

15、AMP 9mm TAC SWITCH CUSHION 1POSITION ON THE SUBPLATE OVER THE POWER BUTTON CUT AND AFFIX USING ADHESIVE PROVIDED ON THE CUSHION. AP12925/1CAMBRIDGE NEW RANGE AMP 7mm TAC SWITCH BUTTON 6POSITION IN PLACE ON THE FRONT PANEL AP12934/1CAMBRIDGE NEW RANGE AMP 7mm TAC SWITCH CUSHION 6POSITION ON THE SUBPL

16、ATE OVER THE POWER BUTTON CUT AND AFFIX USING ADHESIVE PROVIDED ON THE CUSHION. AP12926/2CAMBRIDGE NEW RANGE AMP 7mm PUSH SWITCH BUTTON 2POSITION IN PLACE ON THE FRONT PANEL CONTROL PCB ASSEMBLY (FRONT PANEL SWITCH PCB) M3 X 6 POZI PAN MACHINE SCREW10USED FOR FIXING THE CONTROL PCBS TO THE SUBPLATE

17、STANDOFFS AP13388/3A600 FRONT PANEL PCB CABLE1CONNECTS TO FRONT PANEL SWITCH PCB AND RUNS ALONG FRONT PANEL CONNECTING THE SWITCH PCB TO THE POWER SWITCH AND THE IR PCBS Cambridge Azur 640A Amplifier (Main Assembly BOM Silver Unit) 5 AP PART No.DRAWING NODESCRIPTIONQTYCOMMENTS AP13453/2A600 INPUT PC

18、B TO FRONT PANEL SWITCH PCB1ATTACH FRONT PANEL PCB TO INPUT PCB AS PER DRAWING CABLE TIE 2.5mm X 100mm2ATTACH CABLE LOOM TO SUB PANEL AP13391/2A600 VOLUME MOTOR CABLE1ATTACH VOLUME POT MOTOR TO FRONT PANEL SWITCH PCB AP13394/2A600 AMP PCB TO FRONT PANEL CONTROL PCB CABLE 1ATTACH FRONT PANEL PCB TO A

19、MP PCB AS PER DRAWING BOTTOM PANEL ASSEMBLY AP12734/1CAMBRIDGE NEW RANGE AMP BOTTOM PANEL1 PY541AP12652/2CAMBRIDGE NEW RANGE FOOT MOULDING4POSITION IN PLACE ON BOTTOM PANEL PY544AP12883/3CAMBRIDGE NEW RANGE FOOT PAD4AFFIX ON FOOT USING ADHESIVE SURFACE M3 X 6 PLASTITE POZI PAN4AFFIX FEET TO BOTTOM P

20、ANEL 12.7mm PLASTIC PCB STANDOFF9PUSH SNAP FIT ON BOTTOM PANEL M3 X 6 POZI PAN TAPTITE SCREW12TO AFFIX SUPPORT BRACKETS (POWER AMP ASSEMBLY) TO BOTTOM PANEL M4 X 12 POZI PAN MACHINE BOLT2FIX THROUGH EARTHING POINT HOLES ON BOTTOM PANEL M4 NUT STANDARD2USED TO FIX ABOVE BOLTS M4 LOCK WASHER2FOR EARTH

21、 BOLTS M6 X 60 POZI PAN MACHINE BOLT1USED TO FIX MAIN TRANSFORMER IN PLACE THROUGH THE BOTTOM PANEL AP12629/5230V 194VA TOROID TRANSFORMER1 NEOPRENE TRANSFORMER INSULATION WASHERS2TO FIT EITHER SIDE OF TRANSFORMER TRANSFORMER METAL BOTTOM PLATE1TO FIT UNDER BOTTOM PLATE ON M6 BOLT M6 LOCK WASHER 1PL

22、ACE ABOVE TRANSFORMER ON M6 BOLT TRANSFORMER METAL TOP PLATE1PLACE ON TOP OF TRANSFORMER M6 NUT STANDARD1USED TO FIX ABOVE BOLT INPUT PCB ASSEMBLY1FIXES IN THE CORRECT POSITION ONTO THE PLASTIC PCB STANDOFFS AP12715/4BARE INPUT PCB1 M2.6 X 6 POZI PAN MACHINE SCREW10TO AFFIX BOTTOM PANEL TO SIDE, FRO

23、NT AND REAR PANELS M2.6 X 10 POZI PAN PLASTITE4FIX CORNERS OF BOTTOM PANEL TO PLASTIC INSERTS SIDE PANEL ASSEMBLY2 AP12726/1CAMBRIDGE AUDIO NEW RANGE PRESSED SIDE PANEL (3 RIDGE) 2POSITION IN PLACE ON PLASTIC FRONT INSERTS AP12729/1CAMBRIDGE AUDIO NEW RANGE FRONT PLASTIC SUPPORT (3 RIDGE) 2POSITION

24、AT FRONT WITHIN SIDE PANELS AP12730/1CAMBRIDGE AUDIO NEW RANGE REAR PLASTIC SUPPORT (3 RIDGE) 2POSITON AT REAR WITHIN SIDE PANELS M2.6 X 10 C/S POZI PLASTITE8TO AFFIX SIDE PANELS TO PLASTIC INSERTS A600 REAR PANEL ASSEMBLY1 AP12919/2CAMBRIDGE AUDIO NEW RANGE AMP REAR PANEL PRINTED 1SCREENED WITH ART

25、WORK AP13665/2 THEN POSITION ON REAR PLASTIC SUPPORTS M3 X 10 POZI PAN PLASTITE4TO AFFIX REAR PANEL TO REAR PLASTIC INSERTS M3 X 8 POZI PAN PLASTITE9TO FIX SPEAKER TERMINAL PCB AND ALSO FIX PHONO SOCKETS ON THE INPUT BOARD TO THE REAR PANEL M4 X 8 POZI PAN TAPTITE2FIXES THE IEC SOCKET MOUNTED ON THE

26、 POWER BOARD TO THE REAR PANEL M3X12 MACHINE SCREW WITH PLASTIC KNOB AND EXTERNAL TOOTH ZINC WASHER 1PHONO GND SCREW ON REAR PANEL 6 AP PART No.DRAWING NODESCRIPTIONQTYCOMMENTS AP13389/2A600 AMP PCB TO INPUT PCB POWER CABLE1FIT AS PER DRAWING - JST CONNECTORS AP13393/2A600 AMP PCB TO MAINS PCB CABLE

27、1FIT AS PER DRAWING - JST CONNECTORS AP13396/2A600 INPUT PCB TO AMP PCB SIGNAL CABLE1FIT AS PER DRAWING - JST CONNECTORS AP13392/2A600 AMP PCB TO SPEAKER PCB CABLE1FIT AS PER DRAWING - JST CONNECTORS SELF ADHESIVE CABLE TIE FIXING PAD 19mm X 19mm32X SIDE PANEL, 1X REAR PANEL TO ATTACH AP13395/1 LOOM

28、 TO SIDE OF CHASSIS CABLE TIE 2.5mm X 100mm10(PLEASE FOLLOW EXAMPLE ON MANUFACTURING SAMPLE UNIT 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 PY542AP12733/2

29、CAMBRIDGE AUDIO NEW RANGE TOP PANEL WITH VENTS 1POSITIONON TOP OF THE PRODUCT PY516M2.6 x 8 M/C Torx Recessed Plated8TOP PANEL SCREWS 7 Cambridge Audio Azur 640A Integrated Amplifier AP12714/5 Input & Tone PCB Schematic (Tone Control) C1 330p poly R1 22k R2 4k7 R3 4k7 R4 8k2 R11 8k2 C6 150n poly C9

30、5p SW1:A SW-DPDT DEFEAT -15V +15V R12 10k R13 10k C10 330p poly R20 22k R42 4k7 R43 4k7 R44 8k2 R45 8k2 C11 150n poly C15 5p SW1:B SW-DPDT DEFEAT -15V +15V R46 10k R47 10k -15V +15V C16 47n poly C17 47n poly C19 47n poly C20 47n poly C24 47n poly C27 47n poly C32 100u 25V C33 100u 25V +15V -15V 3 2

31、1 84 U2:A NE5532 5 6 7 U2:B NE5532 3 2 1 84 U4:A NE5532 5 6 7 U4:B NE5532 3 2 1 84 U5:A NE5532 5 6 7 U5:B NE5532 R CH IN L CH IN R CH OUT L CH OUT HEADPHONE SW2:A SW-DPDT TAPE SW2:B SW-DPDT TAPE J1 TERMINAL J2 TERMINAL J3 TERMINAL J4 TERMINAL SPEAKER SWITCHINGRSW1 RSW2 R L GND LSW1 LSW2 2 4 3 1 7 8

32、5 CN2 HEADPHONE JACK J5 TERMINAL J6 TERMINAL J7 TERMINAL C18 22p C21 22p C28 10u 16V NP C29 10u 16V NP C30 10u 16V NP C31 10u 16V NP R52 150k R54 150k R59 150k R60 150k 13 2 VR1:A 20K MOTORISED DUAL POT 46 5 VR1:B 20K MOTORISED DUAL POT 46 5 VR4:B MN20K BALANCE 13 2 VR4:A MN20K BALANCE 13 2 VR2:A B2

33、0K LINEAR 46 5 VR2:B B20K LINEAR 13 2 VR3:A B20K LINEAR 46 5 VR3:B B20K LINEAR R61 220R 3W C R62 470R 1W C R63 220R 3W C R64 470R 1W C 1 2 3 4 5 6 CN3 H6 2.54mm TO POWER AMP To enhance viewing, please print to A38 Cambridge Audio Azur 640A Integrated Amplifier AP12714/6 Input & Tone PCB Schematic (I

34、nput Select) (Production change in 2003 - if R48/R56 fail, please refer to Service Bulletin: TNBC-0006) CD IN L TUNER IN L DVD IN L AV IN L CD IN R TUNER IN R DVD IN R AV IN R PHONO/AUX IN L PHONO/AUX IN R TAPE OUT2 R TAPE OUT1 R TAPE OUT2 L TAPE OUT1 L TAPE MON L TAPE MONR PREOUT R PREOUT L st dat

35、clk COPYRIGHT The Audio Partnership Gallery Court Hankey Place LONDON SE1 4BB Tel : +44 (0)171 940 2200 Fax : +44 (0)171 940 2233 6 CN10:D QUAD PHONO 3 CN11:B QUAD PHONO 6 CN11:D QUAD PHONO 3 CN12:B QUAD PHONO 5 4 CN10:C QUAD PHONO 2 1 CN11:A QUAD PHONO 5 4 CN11:C QUAD PHONO 2 1 CN12:A QUAD PHONO 5

36、4CN13:C QUAD PHONO 1 2 3 4 5 6 CN8 HEADER6 PHONO I/O LK1 6 CN13:D QUAD PHONO 1 2 3 4 5 6 CN7 HEADER6 PHONO PSU 3 CN10:B QUAD PHONO 2 1 CN10:A QUAD PHONO 3 2 1 84 U6:A NE5532 R9 56R R8 56R 5 6 7 U6:B NE5532 3 CN13:B QUAD PHONO 6 CN12:D QUAD PHONO 2 1 CN13:A QUAD PHONO 5 4 CN12:C QUAD PHONO 3 2 1 84 U

37、3:A NE5532 5 6 7 U3:B NE5532 -15V +15V +12V-12V LK2 R21 220K R23 220K R24 100R R25 100R R26 100R R27 220K R28 220K R29 100R R30 100R R31 100R R17 220K R32 220K R33 220K R34 100R R35 100R R36 100R R37 100R R38 100R R39 100R R40 220K R41 220K +15V -15V +30V C2 47n poly C3 47n poly C4 47n poly C5 47n p

38、oly C7 47n poly C8 47n poly C12 22p C13 22p R6 220K R5 10k R7 10k R10 10k R14 10k R15 100K R16 100K C25 10u 16V NP R18 100K R19 100K C14 10u 16V NP R49 100R R51 100R R53 100R Pre Only C26 100n Pre Only -15V +15V +45V +30V R55 680R L CH IN R CH IN L CH OUT R CH OUT HEADPHONE VEE 1 L1 2 L2 3 L4 5 L3 4

39、 L-COM1 6 L-COM2 9 L5 7 L6 8 L-COM3 12 L7 10 L8 11 ST 13 VSS 14 CK 15 DATA 16 R8 18 R7 19 R-COM3 17 R6 21 R5 22 R-COM2 20 R-COM1 23 R3 25 R4 24 R2 26 R1 27 VDD 28 U1 NJU7313 R22 220K R50 220K 2 1 CN4:A DUAL PHONO 3 CN4:B DUAL PHONO LR J8 CHASSIS 4 3 2 1 CN1 H4 2.54mm 4 3 2 1 CN22 H4 2.54mm R48 100R

40、R56 100R D1 12V Zener 400mW D2 12V Zener 400mW +12V -12V C22 10u 25V C23 10u 25V To enhance viewing, please print to A39 Cambridge Audio Azur 640A Integrated Amplifier AP12714/5 Input & Tone PCB Layout (Top Side) To enhance viewing, please print to A310 Cambridge Audio Azur 640A Integrated Amplifier

41、 AP12714/5 Input & Tone PCB Layout (Bottom Side) To enhance viewing, please print to A311 Cambridge Azur Input and Tone PCB BOMAP131336 AP PART No.DRAWING NO DESCRIPTIONQTYDESIGNATORCOMMENTS AP12715/5BARE INPUT PCB1 220R 3W CARBON FILM RESISTOR2R61, R63 470R 1W CARBON FILM RESISTOR2R62, R64 680R 1W

42、CARBON FILM RESISTOR1R55 56R 0.25W METAL FILM RESISTOR2R8, R9 100R 0.25W METAL FILM RESISTOR14R24, R25, R26, R29, R30, R31, R34, R35, R36, R37, R38, R39, R49, R51 4k7 0.25W METAL FILM RESISTOR4R2, R3, R42, R43 8k2 0.25W METAL FILM RESISTOR4R4, R11, R44, R45 10k 0.25W METAL FILM RESISTOR8R5, R7, R10,

43、 R12, R13, R14, R46, R47 22k 0.25W METAL FILM RESISTOR2R1, R20 100k 0.25W METAL FILM RESISTOR4R15, R16, R18, R19 150k 0.25W METAL FILM RESISTOR4R52, R54, R59, R60 220k 0.25W METAL FILM RESISTOR12R6, R17, R21, R22, R23, R27, R28, R32, R33, R40, R41, R50 5p CERAMIC 50/100V 5mm PITCH CAPACITOR4C9, C15

44、22p CERAMIC 50/100V 5mm PITCH CAPACITOR4C12, C13, C18, C21 330p POLY 50/100V 5mm PITCH CAPACITOR2C1, C10 47n POLY 50/100V 5mm PITCH CAPACITOR12C2, C3, C4, C5, C7, C8, C16, C17, C19, C20, C24, C27 150n POLY 50/100V 5mm PITCH CAPACITOR2C6, C11 10u 35V NON POLAR ELECTROLYTIC CAPACITOR6C14, C25, C28, C2

45、9, C30, C31 100u 25V ELECTROLYTIC CAPACITOR2C32, C33 PY487NJU 7313 AUDIO SWITCH IC1U1 PY108NE5532 OP AMP5U2, U3, U4, U5, U6 4 WAY JST CONNECTOR 2.54mm PITCH3CN1, CN22 6 WAY JST CONNECTOR 2.54mm PITCH1CN3 ZUANBAO CK-6.35-08A (SILVER BEZEL) HEADPHONE JACK 1CN2 ZUANBAO AV2-8.4-9 GOLD DUAL PHONO SOCKET1

46、CN4 ZUANBAO AV4-8.4-9 GOLD QUAD PHONO SOCKET 4CN10, CN11, CN12, CN13 6 WAY PIN HEADER 2.54mm PITCH 13mm LONG2CN7, CN8AS PER EXISTING A500 INPUT PCB DPDT WEALTH PBS-22HO1-T18-SL SWITCH2SW1, SW2 PY00420k MOTORISED DUAL LOG POT RM16 WITH 22mm LEGS 1VR1 PY535B20k LINEAR POT2VR2, VR3 PY005MN20k BALANCE P

47、OT1VR4 LINK WIRE 24SWG 20mm LONG30LK1, LK2, ALL BLANK LINK POSITIONS M3 X 14 POZI PAN MACHINE SCREW BLACK1USED TO FIT OPTIONAL PHONO STAGE M3 LOCKWASHER1USED TO FIT OPTIONAL PHONO STAGE M3 NUT BLACK2USED TO FIT OPTIONAL PHONO STAGE AP13395/2640A INPUT PCB TO SPEAKER PCB LOOM1CONNECT AS PER DRAWING T

48、O INPUT PCB BEFORE FITTING INPUT PCB TO CHASSIS AP10001/2CAMBRIDGE AUDIO SCREENING CAN 1EMBOSSED WITH ARTWORK AP10018/1 12 Cambridge Azur 640A Integrated Amplifier AP12711/9 Front Panel Schematics temp dc clip speaker relay overcurrent/short standby relay REMOTE IN RB7 17 RB6 16 RB5 15 RB4 14 RB3 13

49、 RB2 12 RB1 11 RB0 10 VDD 2 VSS 4 RTCC 1 N/C 3 N/C 5 RC4 22 MCLR/VPP 28 RA0 6 RA1 7 RA2 8 RA3 9 RC5 23 RC6 24 CKIN 27 RC7 25 CKOUT 26 RC1 19 RC0 18 RC2 20 RC3 21 U5 PIC16C57 CRS1 FREQ=4MHz 1 2 CN7 H2 2.54mm 90 MOTOR D1 1N4148 C21 100n FIN 1 GND1 2 RIN 3 NC 4 GND2 5 VCC 6 OUT2 7 COM 8 OUT1 9 U6 BA6218 C22 100n +5V DGND DGND1 R27 10k R28 10k R29 10k +5V DGND1 +5V DGND1 +5V DGND1 C23 100n R30 33k D 2 CLK 3 STB 1 OE 15 Q0 4 Q1 5 Q2 6 Q3 7 Q4 14 Q5 13 Q6 12 Q7 11 QS 9 QS 10 VDD 16 VSS 8 U7 74HC4094 R33 820R +5V C24 100n D2 CHANNEL LED D3 CHANNEL LED