Cambridge-840A-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 840AIssue Date: 16th June 2006 _ SERVICE MANUAL_ SPECIFICATIONS: Power Output 120W RMS into 8 Ohms 200W RMS into 4 Ohms THD (unweighted) 0.0015% 1 kHz at 80% of rated power 83dB Input Impedances Input 1 (b

2、alanced) 10 kOhm Inputs 2-7 68 kOhm Tape Input 68 kOhm Power Amp damping factor 110 at 1kHz Max power consumption 800W Minimum power consumption Active (no signal) 70W Standby 7W Bass & Treble controls Shelving type Max bass boost/cut +/- 10dB at 10Hz Max treble boost/cut +/- 7.5dB at 20Hz Dimension

3、s (H x W x D) 115 x 430 x 385mm (4.5 x 16.9 x 15.2”) Weight 15.0kg (33Lbs) AP19597/1 1RadioFans.CN 收音机爱 好者资料库840A SERVICE MANUALTABLE OF CONTENTS Safety Precautions & Important Notes 4Block Diagram 5Exploded Diagram 6Exploded Diagram Parts List 7Front Panel PCB Schematic (Microcontroller & LCD) 8Fro

4、nt Panel PCB Schematic (Shift Registers) 9Front Panel PCB Layout (Top Side) 10Front Panel PCB Layout (Bottom Side) 11Front Panel PCB BOM 12Input PCB Schematic (Input Select) 13Input PCB Schematic (Input Control) 14Input PCB Schematic (Input Amplifier) 15Input PCB Board Layout (Top Side) 16Input PCB

5、Board Layout (Bottom Side) 17 Input PCB BOM 18 Preamp PCB Schematic (Relay Logic) 19 Preamp PCB Schematic (Tone Control) 20 Preamp PCB Schematic (Post Amp) 21 Preamp PCB Board Layout (Top Side) 22 Preamp PCB Board Layout (Bottom Side) 23 Preamp PCB BOM 24-25 Power Amplifier Schematic (Right Power Su

6、pplies & PSU) 26 Power Amplifier Schematic (Right Channel) 27 Power Amp Right & PSU PCB Board Layout (Top Side) 28 Power Amp Right & PSU PCB Board Layout (Bottom Side) 29 Power Amp Right PCB BOM 30-31 Power Amp PSU PCB BOM 32 Power Amp Schematic (Left Channel) 33 Power Amp Schematic (Left Power Supp

7、lies) 34 Power Amp PCB Board Layout (Top Side) 35 Power Amp PCB Board Layout (Bottom Side) 36 Power Amp Left PCB BOM 37-38 Hub PCB Schematic 392RadioFans.CN 收音机爱 好者资料库 Hub PCB Board Layout (Top Side) 40 Hub PCB Board Layout (Bottom Side) 41 Hub PCB BOM 42-43 Rectifier PCB Schematic 44 Rectifier PCB

8、Board Layout (Top Side) 45 Rectifier PCB Board Layout (Bottom Side) 46 Rectifier PCB BOM 47 IC Pin Layout Details 48-49 Technical Description 51-60 Procedure to upgrade the Control (Pic) Software 61-62 Notes 633SAFETY PRECAUTIONS & IMPORTANT NOTES 1. Check that the rear of the product indicates the

9、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 sufficient magnitude to constitute a risk of electric shockto

10、 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 product complies with EEC Low Voltage (73/23/EEC) and E

11、lectromagnetic 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 unauthorised design alterations or additions will void the

12、 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 should be confirmed that they have been returned to no

13、rmal 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 reserved.Cambridge Audio and Azur are registered trade

14、marks 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, copyright, or other notice from this content is prohibited.I

15、nformation 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 840A Amplifier840A Block DiagramTo enhance viewing, please print to A357106239174181581351116611514125Cambridge Audio Azur 84

16、0A Amplifier840A Exploded DiagramTo enhance viewing, please print to A36Cambridge Audio Azur 840A AmplifierExploded Diagram Parts ListDrawingRef:AP Part Numbernoi tpi rcseD: feRyrotcaF1PY11182331-004909E301Speaker Binding Post BP331 (Black) Red & Black2PY10193200-053044E000Toroid 230V/50Hz 36.5VACx4

17、 5.5A TI-053044C2PY10203200-053045E000Toroid 115V/50Hz 36.5VAC 5.5A TI-0853045C for 840A3PY11193200-074051E001Toroid 230V/50Hz 7.5VAC750MA 17VAC*2 TO7405B STB3PY11203200-077811E000Toroid 115V/50Hz 7.5VAC750MA 17VAC*2 STB4PY11216074-150003E000-01840A Bass / Treble Knob (Black) Painted Black4PY1123607

18、4-150003E001A01840A Bass / Treble Knob (Silver) Painted Silver5PY11226074-150004E000Azur 840A Plastic Foot (Black) AP16837*5PY11246074-150004E000A01Azur 840A Plasitc Foot (Silver) AP16837*PY11256574-150009E000-01Azur 840A Top Panel Black PaintedPY11266574-150009E000-02Azur 840A Top Panel Silver6PY11

19、276574-150013E000-01Azur 840A Side Panel, Black Painted6PY11286574-150013E000A01Azur 840A Side Panel,Silver7PY11298584-015010E301Azur 840A Black Front Panel Assy7PY1130Azur-840A Silver Front Panel Assy8PY11316574-150012E000-01Azur 840-A B Front Panel Artwork AP186371/186381 (Metalwork Only)8PY1132Az

20、ur 840-A Silver Front Panel Artwork AP186371/186381 (Metalwork Only)PY11336074-150005E000Azur 840A Volume Knob Plastic Insert (AP1743*)6574-150015E000Azur 840A Volume Knob Skin, Black Azur 840A Volume Knob Skin, Silver PY11353110-840000E000LCD Display Highly Transflective DC00003E02 840APY11366600-9

21、90112E000Azur 840A Display Backlight (AP16841*)PY11382409-010200E001Rotary Encoder Switch REBG161(9*7)PVB20FHINB1-2-24E9PY11399484-015000E041Azur-840A AMP-Hub Control PCB Assy Rev A10PY11599484-015000E341Azur-840A Amp Input PCB Assy Rev A11PY11539484-015000E141Azur-840A EU/UK PSU Power Control PCB A

22、ssy Rev A12PY11469484-015000E091Azur-840A Main-Amp Left PCB Assy Rev A13PY11639484-015001E091Azur-840A Main-Amp Right PCB Assy Rev A14PY11559484-015000E331Azur-840A Pre-Amp Board Rev A15PY11459484-015000E071Azur-840A Amp-Rectifier PCB Rev A16PY11379484-015000E111Azur-840A Amp Front Control PCB Assy

23、Rev A17PY11349484-015000E061Azur-840A LCD Display Board Assy Rev A18PY11659805-084000E001Azur-840A Remote Control Assy Rev AAll spare parts should be ordered from AP Hong Kong office7Cambridge Audio Azur 840A AmplifierAP16369/3 Front Panel PCB Schematic (Microcontroller & LCD)MCLR/VPP1RA0/AN02RA1/AN

24、13RA2/AN24RA3/AN3/VREF5RA4/T0CKI6RA5/AN4/SS7RE0/RD/AN58RE1/WR/AN69RB437RB3/PGM36RB235RB0/INT33VDD32VSS31RD7/PSP730RD6/PSP629RB134RD5/PSP528RD4/PSP427RC7/RX/DT26RC5/SDO24RC4/SDI/SDA23RD3/PSP322RD2/PSP221RC6/TX/CK25VDD11VSS12OSC1/CLKIN13OSC2/CLKOUT14RCO/T1OSO/T1CKI15RC1/T1OSI/CCP216RC2/CCP117RC3/SCK/S

25、CL18RD0/PSP019RE2/CS/AN710RD1/PSP120RB538RB6/PGC39RB7/PGD40U1PIC16F877ASW1SW-TACTSW2SW-TACTSW3SW-TACTSW5SW-TACTSW6SW-TACTSW7SW-TACTSW8SW-TACTSW4SW-TACTSW9SW-TACTSW10SW-TACTSW11SW-TACTINPUT 1INPUT 2INPUT 3INPUT 4INPUT 5INPUT 6INPUT 7TAPE MONMODEspare+5VLOGIC GNDLCD DISPLAY CONNC10100n CERC11100n CERL

26、OGIC GNDSERIAL DATASERIAL CLOCKSERIAL STROBESERIAL CONTROL OUTSERIAL IN FROM A-BUS HUB BOARDOVERLOADHUB DATACLIP DETECTMAINS FAILDC OFFSETPHONES DETECTPORT B HAS WEAK PULLUPSRB4-RB7 HAS INTRPT ON CHANGER122RR243RQ2BC337LOGIC GNDR44K7C1100nC2100nFON/STBYSPEAKER SELECTLOGIC GNDROW 3ROW 2ROW 1COL 1COL

27、2COL 3COL 4X1CRYSTALFREQ=20MHzC522pFC622pFLOGIC GND+5VLOGIC GNDCONNECTOR TO PREAMP PCBSERIAL IN FROM A-BUS HUB BOARDVss 1Vdd 2Vo 3RS 4R/W 5E 6D0 7D1 8D2 9D3 10D4 11D5 12D6 13D7 14LED A 15LED K 16LOGIC GNDTXRXRS232 & IR CABLE TO HUB PCBIR IN (FROM RECEIVER ON PREAMP BOARD)C GND3A SW1B SW2FIX25FIX14RO

28、T1NOBLE16ENCODERPOSITION FOREXTRA SWITCHAKD2BLUE LEDON/STBY LEDIR IN (FROM JACK & PHONO ON HUB PCB)+15VIR GNDIR INRS232 GNDR1010RC9100N CERAMICSERIAL RX 232C410U 16VC310U 16VR5100RC20100nFLOGIC GNDC21100nLOGIC GNDLOGIC GNDQ4BC337+15VRS232 TXR1322KR122K2LOGIC GNDSERIAL TX 232Q3BC337+5VD31N4002RS232 R

29、XR1110KR922KLOGIC GNDSERIAL RX 232RS232 RXRS232 TXSERIAL TX 232PROGRAM_CLOCKPROGRAM_DATAPGMMCLR HUBR1410K+5V+5VProgramming SignalsTo ABUS Hub PICRS232 TXRS232 RXMCLR HUBPGMPROGRAM_DATAPROGRAM_CLOCKHUB CLOCKHUB CLOCKHUB DATAR32K2OVER TEMPOVER TEMP12345678910121311CN3FFC 13WAYBLOCKPIC TXSHIFT REG ENAB

30、LED2CLK3STB1OE15Q04Q15Q26Q37Q414Q513Q612Q711QS9QS10U274HC4094VDD=+5VVSS=LOGIC GNDSHIFT REG ENABLESERIAL DATASERIAL CLOCKBLOCKPIC TXIR CONTROLPHONES DETECTOVERLOADDC OFFSETMAINS FAILLCD DECOUPLEC7100nFLOGIC GND+5VSHIFT REG DECOUPLE123456789101112CN1FFC 12WAY1215161234561a2a3a4a5a6a787a8aCN2CONN-8 DUA

31、L BOTRSELCD DATA SHIFT REGISTER211615LCD CONN ORIENTATION FROM FRONTC15100pFC16100pFC17100nC18100nC19100nCLIP DETECTPIC INPUT EMC CAPSLED BACKLIGHT POWERR61K1R72K2R81K1SPEAKER TESTSPEAKER TESTC22100n+5VTRISTATE LED CONTROL0 = BRIGHTTRISTATE= OFF1= DIMR1510KLOGIC GNDR1647RC23100N CERAMICLOGIC GNDFRON

32、T PANEL GROUNDINGQ5BC337R1710KR182K2C2410U 16VQ6BC337R1910KLOGIC GNDFRONT PANEL GNDFRONT PANEL GNDP2PADP3PADQ1BC327-252CW3CCW1PR1PRESET 20K 3296WCWQ8BC327-25R2310RR2410RD41N4148D51N4148D61N4148D71N4148D8BZX79C2V7 500MWTo enhance viewing, please print to A38Cambridge Audio Azur 840A AmplifierAP16369/

33、3 Front Panel PCB Schematic (Shift Registers)D2CLK3STB1OE15Q04Q15Q26Q37Q414Q513Q612Q711QS9QS10U374HC4094VDD=+5VVSS=LOGIC GNDLOGIC GNDD2CLK3STB1OE15Q04Q15Q26Q37Q414Q513Q612Q711QS9QS10U474HC4094VDD=+5VVSS=LOGIC GNDD2CLK3STB1OE15Q04Q15Q26Q37Q414Q513Q612Q711QS9QS10U574HC4094VDD=+5VVSS=LOGIC GNDFROM SHEE

34、T 1SERIAL CLOCKSERIAL DATASERIAL STROBESHIFT REG ENABLE12345678CN4FFC 08WAY12345678CN5FFC 08WAY12345678CN6FFC 08WAYD2CLK3STB1OE15Q04Q15Q26Q37Q414Q513Q612Q711QS9QS10U674HC4094VDD=+5VVSS=LOGIC GND12345678CN7FFC 08WAYC8100nF+5VC12100nFC13100nFC14100nFSHIFT REG DECOUPLETO PREAMP BOARDTO PREAMP BOARDTO P

35、REAMP BOARDTO INPUT BOARDTo enhance viewing, please print to A39Cambridge Audio Azur 840A AmplifierAP16369/3 Front Panel PCB Layout (Top Side)AP16370/3(c) COPYRIGHT Audio Partnership PLC 2005U1ROT1SW1SW2SW3SW4SW5SW6SW7SW8X1SW9SW10SW11C1C2C3C4C5C6C10C11C12C13C14C15C17R1R2R3R4R6D2D3R9R10R11R12R13R14R1

36、5C7C8C9C16C18C19Q1Q2Q3Q4R5C20AP16370/3C21C22R7U2U3U4U5U6C24Q5R17R18R19Q6C23P2P3R16CN2R23R24Q8R8D4D5D6D7D8To enhance viewing, please print to A310Cambridge Audio Azur 840A AmplifierAP16369/3 Front Panel PCB Layout (Bottom Side)To enhance viewing, please print to A311AP16372/5AP NoValueDescription/Typ

37、eQtyComponent IdentNotesRESISTORS10R0.25 W 1% Metal Film3R10, R23, R2422R0.25 W 1% Metal Film1R143R0.25 W 1% Metal Film1R247R0.25 W 1% Metal Film1R16100R0.25 W 1% Metal Film1R51K10.25 W 1% Metal Film2R6, R8,2K20.25 W 1% Metal Film4R3, R7, R12, R18,4K70.25 W 1% Metal Film1 R410K0.25 W 1% Metal Film5

38、R11, R14, R15, R17, R1922K0.25 W 1% Metal Film2 R9, R13CAPACITORS22pFCeramic 50V 10% Pitch=5mm2C5, C6100pFCeramic 50V 10% Pitch=5mm2C15, C16100nFCeramic 50V 10% Pitch=5mm17C1, C2, C7, C8, C9, C10, C11, C12-C14, C17 - C21, C22, C2310uF16V Electrolytic Radial (Height =5.2mm) Pitch=2.5mm3C3, C4, C24Not

39、e: Low profile electrolyticSEMICONDUCTORSPIC16F877A - I/PPIC Flash Microcontroller 40 pin DIL1U1Contact Audio Partnership ServiceDepartmentPY110074HC4094Shift register 16 pin DIL5U2 - U6TRANSISTORSPY219BC327-25PNP Small Signal TO922Q1, Q8PY214BC337-25NPN Small Signal TO924Q2, Q3, Q4, Q5DIODESBLUE LE

40、DBlue LED 3mm UNI flat top1D21N4148General purpose diode4D4,D5, D6,D7. esaC53ODWm0048D1Wm0047V2edo i dreneZ7V2-C97XZB1N4002General Purpose Rectifier1D3MISCELLANEOUSPY1141D100-SSV-1212-WAY FFC reverse-needle type, single-row contacts1CN1PY1142D100-SSV-1313-WAY FFC reverse-needle type, single-row cont

41、acts1CN3PY1140D100-SSV-088-WAY FFC FRONT-PREAMP CONNS, reverse-needle type single-row contacts4CN4, CN5, CN6, CN7PY1138REB161(9x7)PVB20FHINB 1-2-24E Noble ROTARY ENCODER1ROT111WS-1WS11hc t iwst caT000-002020-0042340YP1X1H4 /94CHLATSYRCzHM02MULTITURN PRESET 20KSide adjust. Foot print 9.5 x 4.5 mm1PR1

42、Cambridge Audio Azur 840A Amplifier Front Panel PCB BOMNote: resistors, capacitors and other generic electronic components are not usually stocked by the manufacturer. Please obtain these locally.12Cambridge Audio Azur 840A AmplifierAP16361/3 Input PCB Schematic (Input Select)54CN1:CQUAD PHONO6CN1:D

43、QUAD PHONO21CN1:AQUAD PHONO3CN1:BQUAD PHONO54CN2:CQUAD PHONO6CN2:DQUAD PHONO21CN2:AQUAD PHONO3CN2:BQUAD PHONO54CN4:CQUAD PHONO6CN4:DQUAD PHONO21CN3:AQUAD PHONO3CN3:BQUAD PHONO-15V+15VR1220KR2220KR347RR41KR51KR6220KR7220KR81KR9100RR101KR12220KR13220KR1447RR151KR161KR171KR181KR19100RR20220KR21220KC110

44、0n CERC2100n CERR23100RC3100nF 100VR24220KR25220KLEFTRIGHTTAPE RETURN RTAPE RETURN LEFTHUB INPUT SWITCHERINPUT PCB - HUB PCBSWITCHER DATASWITCHER CLOCKSWITCHER STROBETAPE OUT RINPUT 1INPUT 2INPUT 3INPUT 4INPUT 5TAPE OUT LVss1L-S12L-S23L-S34L-COM15L-S46L-S57L-S68L-COM29L-S710L-S811L-COM312ST13GND14Vd

45、d28R-S127R-S226R-S325R-COM124R-S423R-S522R-S621R-COM220R-S719R-S818R-COM317DATA16CLK15U1TC9163678RL1:CRELAY345RL1:BRELAYHUB IN L54CN3:CQUAD PHONOR261KR271KR28220KR29220KINPUT 6INPUT 721CN4:AQUAD PHONO678RL2:CRELAY678RL3:CRELAY678RL4:CRELAY678RL5:CRELAY678RL6:CRELAY678RL7:CRELAY678RL8:CRELAYINPUT R6C

46、N3:DQUAD PHONOR30220KR311K3CN4:BQUAD PHONOR32220KR331KINPUT 1INPUT 2INPUT 3INPUT 4INPUT 6INPUT 7INPUT 5345RL2:BRELAY345RL3:BRELAY345RL4:BRELAY345RL5:BRELAY345RL6:BRELAY345RL7:BRELAY345RL8:BRELAY3CN5:BQUAD PHONOINPUT L54CN5:CQUAD PHONO6CN5:DQUAD PHONOPREAMP OUT LPREAMP OUT R21CN5:AQUAD PHONO32184U14:

47、ANE5532567U14:BNE5532R5720KR5820KR5910KR6010KR6120KR6220KR6310KR6410KC4100nFC522pFC622pFC722pFC822pFHUB IN LHUB IN LHUB IN R+5VLOGIC GNDINPUT ONE LEFT +INPUT ONE LEFT -GNDGNDINPUT ONE RIGHT +INPUT ONE RIGHT -INPUT 1 L-INPUT 1 L+INPUT 1 R-INPUT 1 R+GNDINPUT 1 L-INPUT 1 L+INPUT 1 R-INPUT 1 R+R22100RR3

48、4100R32184U2:ANE5532R35100KR361KR371K32184U4:ANE5532R38100KC1347pFC1447pFC1547pFC2247pFC2347pFC2447pFC2547pFC2647pFC2747pFC2847pFC2947pFC3047pFC3147pFPREAMP OUTPREAMP OUTC3247pF+15V-15V-15V+15V32184U3:ANE5532R42100kR4347K567U3:BNE5532R4447KR45100K32184U5:ANE5532R40100KR4147K567U5:BNE5532R4647KR47100

49、K+15V-15VC3810U NP 35VC3610U NP 35VC3910U NP 35VC4110U NP 35VC4510U NP 35VC4610U NP 35VC4710U NP 35V32184U6:ANE5532567U6:BNE553232184U7:ANE5532567U7:BNE553232184U8:ANE5532567U8:BNE5532R5547KR5647KR6547KR66100KR67100KR68100K+15V-15VC5110U NP 35VC5210U NP 35VC5310U NP 35VR69100KR70100KR71100KR7247KR73

50、47KR7447K+15V+15V+15V-15V-15V-15VC6010U NP 35V32184U18:ANE5532R76100KR7747K567U18:BNE5532C6210U NP 35VR78100KR7947K-15V+15VHUB 1LHUB 2LHUB 3LHUB 4LHUB 5LHUB 6LHUB 7LHUB 1RHUB 2RHUB 3RHUB 4RHUB 5RHUB 6RHUB 7RHUB 1LHUB 2LHUB 3LHUB 4LHUB 5LHUB 6LHUB 7LHUB 1RHUB 2RHUB 3RHUB 4RHUB 5RHUB 6RHUB 7R+15V-15VJ