Cambridge-740A-pwr-sm维修电路原理图.pdf

《Cambridge-740A-pwr-sm维修电路原理图.pdf》由会员分享，可在线阅读，更多相关《Cambridge-740A-pwr-sm维修电路原理图.pdf（60页珍藏版）》请在收音机爱好者资料库上搜索。

1、Gallery Court Hankey Place London SE1 4BB UK Tel: +44 (0)20 7940 2200 Fax: +44 (0)20 7940 2233 740AIssue Date: 8th August 2007 SERVICE MANUAL SPECIFICATIONS: Power Output 100W RMS into 8 Ohms 150W RMS into 4 Ohms THD (unweighted) 0.001% 1 kHz At 80% of rated power 96 dB Input Impedances Inputs 1-6 4

2、7 kOhm Power Amp Damping Factor 110 at 1 kHz Max Power Consumption 750W Minimum Power Consumption Active (no signal) 45W Standby 6W Bass & Treble Controls Shelving Type Max bass boost/cut +/-10 dB at 10 Hz Max treble boost/cut +/- 7.5 dB at 20 kHz Dimensions 115 x 430 x 350mm (4.5 x 16.9 x 13.8”) We

3、ight 10.7kg (23.5Lbs) AP22267/1 1RadioFans.CN 收音机爱 好者资料库740A SERVICE MANUALTABLE OF CONTENTS Safety Precautions & Important Notes 4Exploded Diagrams 5-8 Exploded Diagram Parts List 9Front Panel PCB Schematic (Tone Control) 10Front Panel PCB Schematic (Microcontroller & LCD) 11Front Panel PCB Layout

4、(Top Side) 12Front Panel PCB Layout (Bottom Side) 13Front Panel PCB BOM 14-15 Preamp PCB Schematic (Tone Control) 16 Preamp PCB Schematic (Protection Circuitry) 17 Preamp PCB Schematic (Power Supply) 18 Preamp PCB Schematic (Headphone Driver) 19 Preamp PCB Schematic (Buffers & Switches) 20Preamp PCB

5、 Board Layout (Top Side) 21 Preamp PCB Board Layout (Bottom Side) 22 Preamp PCB BOM 23-26 Amplifier Schematic (Speaker PCB) 27 Amplifier Schematic (Right Channel) 28 Amplifier Schematic (Left Channel) 29 Amplifier Schematic (Protection) 30 Amplifier Schematic (Power Supply) 31 Amplifier PCB Board La

6、yout (Top Side) 32 Amplifier PCB Board Layout (Bottom Side) 33 Amplifier PCB BOM 34-36 Abus Schematic 37 Abus PCB Board Layout (Top Side) 38 Abus PCB Board Layout (Bottom Side) 39 Abus PCB BOM 40-41 Mains Schematic (Mains) 42 Mains PCB Board Layout (Top Side) 43 Mains PCB Board Layout (Bottom Side)

7、44 Mains PCB BOM 452RadioFans.CN 收音机爱 好者资料库ICPinLayoutDetails_4651ServiceModeInstructions_52ProceduretoUpgradeSoftware_53KandaPICHandHeldProgrammerModificationInstructions_5458RevisedFrontPanelSchematictoimproveencoderreliability:(seeServiceBulletinTNBC0035)_5960SAFETY PRECAUTIONS & IMPORTANT NOTES

8、1. Check that the rear of the product indicates the correct supply voltage for your area. 2. The lighting 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 sufficien

9、t magnitude to constitute a risk of electric shockto persons. 3. The exclamation point within an equilateral triangle is intendedto alert the user or service agent to the presence of important operating and maintenance (Servicing) instructions in the literatureaccompanying the appliance. 4. This pro

10、duct complies with EEC Low Voltage (73/23/EEC) and Electromagnetic Compatibility (89/336/EEC) Directives 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 unauth

11、orised design alterations or additions will void the manufacturerswarranty; furthermore the manufacturer cannot accept responsibility for personal injury or property damage resulting therefrom. 6. When servicing, care should be taken to observe the original routing anddressing of the leads and it sh

12、ould be confirmed that they have been returned to normal after re-assembly.Notes on chip component replacementNever 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. 2007 Audio Partnership PLC. All rights re

13、served.Cambridge Audio and Azur are registered trademarks for Audio Partnership PLC. This documentmay 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, copyrigh

14、t, or other notice from this content is prohibited.Information provided in this document is provided solely for the use of official service agents in repairing and servicing Audio Partnership PLC products.4Cambridge Audio Azur 740A AmplifierExploded Diagram (Complete Unit)33215To enhance viewing, pl

15、ease print to A35Cambridge Audio Azur 740A AmplifierExploded Diagram (Chassis Assembley)131098116To enhance viewing, please print to A36Cambridge Audio Azur 740A AmplifierExploded Diagram (Front Panel Assembley)7645To enhance viewing, please print to A37Cambridge Audio Azur 740A AmplifierExploded Di

16、agram (Rear Panel Assembley)111214To enhance viewing, please print to A38Cambridge Audio Azur 740A AmplifierExploded Diagram Parts Listno i tp i r cseDno i t ang i seDyrot caFrebmuNt r aPf eRgn iwarD1PY12373200-063073E000Azur-740A 230V Transformer TI-063073D For EU Version-PY12423200-063074E000Azur-

17、740A 110V Transformer For CU (USA) Version2PY13386574-150018E000-02Azur 740A Top Panel-S (With Painted)-PY13396574-150018E000-01Azur 740A Top Panel-B (With Painted)3PY13406574-150020E000-02Azur-740A Side Panel-S (With Painted)-PY13416574-150020E000-01Azur-740A Side Panel-B (With Painted)4PY13428574-

18、015010E301Azur-740A Front Panel-S Assy Rev A (Metal plus PCB)-PY13438574-015020E301Azur-740A Front Panel-B Assy Rev A5PY13446574-150029E000A01Azur-740A Front Panel Artwork-S (AP200931) (metal)-PY13456574-150029E000-01Azur-740A Front Panel Artwork-B 6PY13469474-015000E041Azur-740A Control PCBA Rev A7

19、PY11382409-010200E001Rotary Encoder Switch REB161(9*7)PVB20FHINB1-2-24E8PY13479474-015000E091Azur-740A Amp Power PCBA (AP19797/A) Rev A 9PY13489474-015000E001Azur-740A Protection Circuitry PCB-A Assy Rev A10PY13499474-015000E101Azur-740A Protection Circuitry PCB-B Assy Rev A11PY13509474-015000E331Az

20、ur-740A A-Bus Hub PCBA REV A12PY13512404-040100E001Piano DIP Switch 4P DPL-04K Series13PY13529474-015000E341Azur-740A Input PCBA Rev A 14PY13222333-008919E003WP8-22 8 Way SPK Terminal 4Blk/4Red Gold Plating for 740A15PY11659805-084000E001Azur-740/840/A/C Remote Control Assy Rev A16PY11226074-150004E

21、000Plastic foot black-PY11256074-150004E000A01Plastic foot silver9Cambridge Audio Azur 740A AmplifierAP19784/3 Front Panel Circuit Diagram (Tone Control)R1034K71/4WMetalFilm+15V-15VR1062K21/4WMetalFilmR1072K21/4WMetalFilmR2034K71/4WMetalFilm+15V-15VR2062k21/4WMetalFilmR2072K21/4WMetalFilmRRLL23184U1

22、00:ANE5532PAudioOpAmp657U100:BNE5532PAudioOpAmp23184U200:ANE5532PAudioOpAmp657U200:BNE5532PAudioOpAmpRRLLC10447nF63VMet. PolyesterC10647nF63VMet. PolyesterC20447nF63VMet. PolyesterC20647nF63VMet. PolyesterC10310pF50VNP0 CeramicC20310pF50VNP0 CeramicC20710pF50VNP0 CeramicC10710pF50VNP0 CeramicC1011.5

23、nF63VMet. PolyesterC2011.5nF63VMet. PolyesterRL-15V+15VSHIELD_SUPPLY1234CN44WayRight Angle HeaderSHIELD_L2SHIELD_R2RIGHTLEFT123456CN66WayRight Angle Header123456CN76WayRight Angle HeaderRARTBRCRARBBRCRARTBRBBRCLALTBLCLALBBLCLALTBLBBLCVR1:A5kPushActionLinearPotVR1:B5kPushActionLinearPotVR2:A5kPushAct

24、ionLinearPotC10680nF63VMet. PolyesterVR2:B5kPushActionLinearPotC18680nF63VMet. PolyesterGUARDRL12345CN85WayStraight Header1234CN104WayStraight HeaderLK3724AWGLK3824AWGLK3924AWGRRLLLK4024AWGLK124AWG12345678CN58WayRight Angle HeaderR221K11/8WMetalFilmR211K11/8WMetalFilmR252K21/8WMetalFilmR262K21/8WMet

25、alFilmR242K21/8WMetalFilmR232K21/8WMetalFilmR201K11/8WMetalFilmR181K11/8WMetalFilm12345612345CA1SeeAP20044/16Wayto5WayScreened Audiocable1234561234CA2SeeAP20043/16Wayto4WayScreened AudiocableTo enhance viewing, please print to A310Cambridge Audio Azur 740A AmplifierAP19784/3 Front Panel Circuit Diag

26、ram (Microcontroller & LCD)PGD2.PGC1.MCLR/VPP1RA0/AN02RA1/AN13RA2/AN2/Vref-/CVref4RA3/AN3/VREF+5RA4/T0CKI/C1OUT6RA5/AN4/SS/C2OUT7RE0/RD/AN58RE1/WR/AN69RB437RB3/PGM36RB235RB0/INT33VDD32VSS31RD7/PSP730RD6/PSP629RB134RD5/PSP528RD4/PSP427RC7/RX/DT26RC5/SDO24RC4/SDI/SDA23RD3/PSP322RD2/PSP221RC6/TX/CK25VD

27、D11VSS12OSC1/CLKIN13OSC2/CLKOUT14RCO/T1OSO/T1CKI15RC1/T1OSI/CCP216RC2/CCP117RC3/SCK/SCL18RD0/PSP019RE2/CS/AN710RD1/PSP120RB538RB6/PGC39RB7/PGD40U1PIC16F877A-I/PPROGRAMMED_WITH=AP20357/xSW1KPT-1105ASW2KPT-1105ASW3KPT-1105ASW4KPT-1105ASW7KPT-1105ASW8KPT-1105ASW9KPT-1105AINPUT1INPUT2INPUT3INPUT4INPUT5T

28、APEMONMODE+5VLCD DISPLAYCONNC1100nF50VMono CeramicC2100nF50VMono CeramicSERIALDATASERIAL CLOCKINPUTSTROBEVI/SHORTCLIPDETECTMAINSFAILDCOFFSETPHONESDETECTC4100nF50VMono CeramicON/STBYROW3ROW2COL1COL2COL3X1Strip Cut Crystal4MHzC522pF50VNP0 CeramicC622pF50VNP0 CeramicVss 1Vdd 2Vo 3RS 4R/W 5E 6D07D18D29D

29、3 10D4 11D5 12D6 13D7 14LED A 15LED K 16CGND3ASW1BSW2FIX25FIX14ROT1NobleRotary EncoderC710uF16VElectrolyticC810uF16VElectrolyticC9100nF50VMono CeramicPREAMPRELAYVOLUMESTROBE+5V+5VOVER TEMPD2CLK3STB1OE15Q04Q15Q26Q37Q414Q513Q612Q711QS9QS10VCC16GND8U2M74HC4094B1ROVER TEMPVI/SHORTDCOFFSETLCDDECOUPLE2115

30、161234561a2a3a4a5a6a787a8aCN12x8WayDILBottom Entry HeaderRSE211615LCDCONNORIENTATIONFROMFRONTCLIPDETECTON/OFFBRIGHTCONTROL BUS IR+5VSERIAL CLOCKSERIALDATAINPUTSTROBEABUSIRPOWERAMPRELAYLCD STR.SW6KPT-1105ASW5KPT-1105A1P5C1110nF50VCeramic1P2C1210nF50VCeramic1P3C1310nF50VCeramic1P4C1410nF50VCeramic1P1C

31、1510nF50VCeramicVOLUMESTROBESPEAKERABUSIR+5VSPEAKERARELAYRC5BLOCKRC5 TXC16100nF50VMono Ceramic+5VC1710uF16VElectrolyticPHONESDETECTCONTROLBUSIRPREAMPRELAYSPEAKERARELAYSPEAKERBRELAYSPEAKERBRELAYTOPOWERAMPPCBTOPREAMPPCBMAINSFAILRC5BLOCKRC5 TXPOWERAMPRELAY+5VD1BlueAzurLEDPOWERAMPRELAYDIRECT RELAYDIRECT

32、 RELAYSW10KPT-1105ADIRECTROW4+5VR19100R1/4WMetalFilmR31K21/4WMetalFilmR6300R1/4WMetalFilmR156R1/4WMetalFilmR256R1/4WMetalFilmR510K1/4WMetalFilmR1010K1/4WMetalFilmR1110K1/4WMetalFilmR15220R1/4WMetalFilmR12220R1/4WMetalFilmR1447R1/4WMetalFilmR810R1/4WMetalFilmR910R1/4WMetalFilmR161K1/8WMetalFilmR171K1

33、/8WMetalFilmR410K1/4WMetalFilmR710K1/4WMetalFilm12345678910CN910WayRight Angle Header+5V3OPT1GND2U3TSOP3483636KHz123456CN26WayRight Angle HeaderPIC IRON/OFF+5VMCLR+5V+5VPIC IR ON/OFF+5V123456CN116Way+5VC347nF50VCeramicC2247nF50VCeramic+5VD41N4148Signal DiodeMCLRLK224AWGLK324AWG+5V+5VLK424AWGLK624AWG

34、LK724AWG+5V+5VLK924AWGCONTROLBUSIRCONTROLBUSIRLK1024AWG+5V+5VLK1224AWGLK1324AWGLK1424AWGLK1524AWGLK1624AWGLK1724AWGLK2024AWGLK2124AWGLK2224AWGLK2324AWGLK2424AWGLK2524AWGLK2624AWGLK2724AWGLK2824AWGLK2924AWGLK3024AWGLK3124AWGLK3324AWGLK3424AWGLK3224AWGLK3524AWGLK3624AWGLK824AWG231U4:AVCC=+5VM74HC02GND

35、=GND564U4:BVCC=+5VM74HC02GND=GND8910U4:CVCC=+5VM74HC02GND=GND111213U4:DVCC=+5VM74HC02GND=GNDLK524AWGLK1124AWGR3610K1/4WMetalFilmR391K1/8WMetalFilmR2847K1/4WMetalFilmR3410K1/4WMetalFilmR3547K1/8WMetalFilmR2747K1/4WMetalFilmR2947K1/4WMetalFilmR3047K1/4WMetalFilmR3147K1/4WMetalFilmR32100K1/4WMetalFilmR

36、3310K1/4WMetalFilmPGDPGCQ3BC337-25NPN SignalQ1BC337-25NPN SignalQ2BC337-25NPN Signal123456789CN39WayRight Angle HeaderR1347K1/8WMetalFilmLCD STRLCD STR.LCD STRBRIGHTON/OFF+5VLK1824AWG2CCW1CW3PR1Multiturn500RTo enhance viewing, please print to A311Cambridge Audio Azur 740A AmplifierAP19784/3 Front Pa

37、nel Board Layout (Top Side)To enhance viewing, please print to A312Cambridge Audio Azur 740A AmplifierAP19784/3 Front Panel Board Layout (Bottom Side)To enhance viewing, please print to A313AP19787/4AP Part NoValueDescription/TypeQtyComponent IdentTypeToleranceFactory P/NNotes10R1/4W Metal Film2R8,

38、R91%47R1/4W Metal Film1R141%56R1/4W Metal Film2R1, R21%100R1/4W Metal Film1R191%220R1/4W Metal Film2R12, R151%300R1/4W Metal Film1R61%1K1/8W Metal Film3R16, R17, R391%1K11/8W Metal Film4R18, R20-R221%1K21/4W Metal Film1R31%2K21/8W Metal Film4R23-R261%2K21/4W Metal Film4R106, R107, R206, R2071%4K71/4

39、W Metal Film2R103, R2031%10K1/4W Metal Film8R4, R5, R7, R10, R11, R33, R34, R361%47K1/8W Metal Film2R13, R351%47K1/4W Metal Film5R27-R311%100K1/4W Metal Film1R321%500RMultiturn1PR110%5kPush Action Linear Pot2VR1, VR21065-002500E12010pF 50VNP0 Ceramic4C103, C107, C203, C2075%1181-100042-00022pF 50VNP

40、0 Ceramic2C5, C65%1181-220042-0001.5nF 63VMet. Polyester2C101, C20110%1117-152052-90010nF 50VCeramic5C11-C1510%1100-103043-00047nF 50VCeramic2C3, C2210%1100-473044-00047nF 63VMet. Polyester4C104, C106, C204, C20610%1117-473053-000100nF 50VMono Ceramic5C1, C2, C4, C9, C1610%1100-104043-000680nF 63VMe

41、t. Polyester2C10, C1810%1117-684053E00010uF 16VElectrolytic3C7, C8, C1720%1102-100014-0002x8 WayDIL Bottom Entry Header1CN12350-016300-001Please mount on track side of PCB6 WayRight Angle Header3CN2, CN6, CN72300-006010-0009 WayRight Angle Header1CN34 WayRight Angle Header1CN42300-004010-0008 WayRig

42、ht Angle Header1CN55 WayStraight Header1CN82300-005000-00010 WayRight Angle Header1CN94 WayStraight Header1CN102300-002000-0016 WayIDC Programming Header1CN114MHzStrip Cut Crystal1X1Blue Azur LED3mm1D13100-000030-00375V 150mASignal Diode1D41401-141480-000DIODESCambridge Azur 740A Front Panel PCB Ass

43、embly BOMRESISTORSRESISTORS VARIABLECAPACITORSCONNECTORSCRYSTALSNote: resistors, capaciotrs and other generic electronic components arenot usually stocked by the manufacturer. Please obtain these locally.14AP19787/4AP Part NoValueDescription/TypeQtyComponent IdentTypeToleranceFactory P/NNotesCambrid

44、ge Azur 740A Front Panel PCB Assembly BOM40 PinFlash Microcontroller1U1PIC16F877A-I/PProgram with software:AP20357/xPlease add version label!PY524M74HC4094B8 Bit Shift Register1U2M74HC4094B1R4174-409052-600PY75536KHzIR Receiver IC1U3TSOP348363001-348360-000PY471Quad 2 InputNOR Gate1U4M74HC02PY108Dua

45、lAudio Op Amp2U100, U200NE5532P4155-320052-900PY21445V 300mANPN Signal3Q1-Q3BC337-251300-337000-100INTEGRATED CIRCUITSTRANSISTORSNote: resistors, capaciotrs and other generic electronic components arenot usually stocked by the manufacturer. Please obtain these locally.15Cambridge Audio Azur 740A Amp

46、lifierAP19799/6 Preamp PCB Circuit Diagram (Tone Control)+15V-15VLCh InRCh In123456CN56 WayStraight HeaderTO POWER AMPC49NP Electrolytic100uF 25VC47NP Electrolytic100uF 25VRCh OutLCh OutC50Polypropylene100nF 100VC48Polypropylene100nF 100VC78100uF 25VElectrolyticC77100uF 25VElectrolyticZCEN1ZCEN22CSN

47、3SDATAI4DGND5REF6DVSS7SCLK8SDATAO9TE110TE211TE312IN213REF2A14REF2B15OUT216AVDD217AVSS218AVSS119AVDD120OUT121REF1B22REF1A23IN124U2YAC526Volume ICR461/4W Metal Film330RR471/4W Metal Film330RLR451/4W Metal Film330RR441/4W Metal Film330RR1234CN134 WayStraight HeaderRL123456789CN129 WayStraight HeaderRL+

48、15V-15VRLRCh OutLCh OutC38Electrolytic470uF 10VC39Electrolytic470uF 10VC3747nF 63VMet. PolyesterC4047nF 63VMet. PolyesterC56Electrolytic470uF 10VC42Electrolytic470uF 10VC5547nF 63VMet. PolyesterC4147nF 63VMet. PolyesterVI2VO3ADJ1U7LM337TAdj RegulatorC1147nF 63VMet. PolyesterC15100uF 25VElectrolyticC

49、1447nF 63VMet. PolyesterR15120R1/8W Metal FilmR13620R1/8W Metal FilmR1410k1/8W Metal Film-15VVI2VO3ADJ1U6LM337TAdj RegulatorR142120R1/8W Metal FilmR141620R1/8W Metal FilmR14010k1/8W Metal Film-15VC347nF 63VMet. PolyesterC16100uF 25VElectrolyticC1747nF 63VMet. PolyesterR16220R1/8W Metal FilmR113k1/8W

50、 Metal FilmR121k81/8W Metal Film+15VVI3VO2ADJ1U8LM317TAdj RegulatorSTARSTARDGNDR36220R1/8W Metal FilmR35220R1/8W Metal FilmC10Mono Ceramic100nF 100V-6.6VD-6.6VD-6.6VA+6.6VA-6.6VAR34220R1/8W Metal FilmR33220R1/8W Metal Film+6.6VAR12910k1/8W Metal FilmVolume StrobeDataClockC3547uF 35VElectrolyticC847u