Cambridge Audio Azur 340A, Service Manual

Page 1: ...ERVICE MANUAL ________________________________________________________________________ SPECIFICATIONS Power Output 40W into 8Ω 50W into 4Ω Max Power Consumption 345W Total Harmonic Distortion 1kHz 0 009 20kHz 0 09 Frequency Response 1dB 5Hz 50kHz S to N Ration unweighted 99dB Slew Rate into 8Ω 20V uS Dimensions HxWxD mm 70 x 430 x 310 Inches 2 8 x 16 9 x 12 2 Weight Kg 6 2 Lbs 13 6 AP15844 1 1 ...

Page 2: ...ayout Top Side 7 Micro controller PCB Layout Bottom Side 8 Front Panel PCB Assembly BOM 9 Main PCB Schematic Input Select 10 Main PCB Schematic Power Amplifiers 11 Main PCB Schematic Power Supplies 12 Main PCB Schematic Tone Control 13 Main PCB Layout Top Side 14 Main PCB Layout Bottom Side 15 Main PCB BOM 16 18 IC Pin Layout Details 19 20 Silver Black Differences BOM 21 2 ...

Page 3: ...s 5 Any unauthorised design alterations or additions will void the manufacturer s warranty 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 and dressing of the leads and it should be confirmed that they have been returned to normal after re assembly Notes on chi...

Page 4: ...gn Up The Power Button Holes AP12931 1 Lightguide 3 Fasten To Subplate Input select LEDs AP12931 1 Lightguide half of 0 5 Fasten To Subplate Power LED M3 X 6 Pozi Pan Stp Screw 4 Affixes Three Lightguide To Subplate PY638 AP14157 1 Front Panel Punched And Printed Silver 1 Extrusion Details AP12738 Screened With Artwork AP14826 1 AP14828 2 AP12935 1 IR Lens 1 Glued In Place On The Front Panel M3 X ...

Page 5: ...oket CN3 on main PCB to Chassis earth stud M4 Nut Standard 1 Used To Fix earth lead to earth stud M4 Lock Washer 1 For above nut LED wireform is attached to main PCB Glue power LED into light guide Lidding AP13340 1 Lidding Tape For Front And Rear Panels 2 Fix To The Correct Surfaces For Lid AP13342 1 Lidding Tape For Side Panels 2 Fix To The Correct Surfaces For Lid PY640 AP14161 1 340A Top Panel...

Page 6: ...NNEL LED D5 CHANNEL LED D6 CHANNEL LED SW2 CD SW3 TUNER DAB SW5 AV MD SW1 AUX PHONO SW6 TAPE MON SW4 DVD 5V 3 OPT 1 GND 2 U3 TSOP18 IR RECEI C1 100n strobe data clock clock data strobe vol up vol down vol up vol down C3 47u 16V R3 220R C4 100n 1 2 3 4 5 6 7 8 CN2 H8 2 54mm 90 DGND 5V IR RECEIVER AUX PHONO CD TUNER DAB TAPE MON DVD AV MD 1 2 3 CN3 CONN H3 1 2 3 CN4 CONN H3 MOTOR CONTROL CONN TO MAI...

Page 7: ...Cambridge Azur 340A Intergrated Amplifier AP14518 1 Microcontroller PCB Board Layout Top Side To enhance viewing please print to A3 7 ...

Page 8: ...Cambridge Azur 340A Intergrated Amplifier AP14518 1 Micrcontroller PCB Board Layout Bottom Side To enhance viewing please print to A3 8 ...

Page 9: ...LE VISHAY 1 U3 As used in 540A 3001 183600 001 PY064 FLAT TOP BLUE LEDS AS PER CURRENT CAMBRIDGE 6 D1 D6 Please use flat top LED at standard Azur height ICP Picoplex PF 50 6 way male header 1 CN1 Vertical H8 2 54mm 90 1 CN2 Right angle connector 8 way H2 2 54mm 90 1 CN5 Right angle connector 2 way H3 2 54mm 90 1 CN3 Right angle connector 3 way AP14897 1 Azur 340A IR PCB cable 1 2400 020200 000 Tac...

Page 10: ...C13 22p R32 220K R33 10k R34 10k R35 10k R36 10k R37 100K R38 100K R39 100K R40 100K R41 100R R46 100R R47 100R C26 100nF 100V L CH IN R CH IN R50 220K R51 220K 2 1 CN9 A DUAL PHONO 3 CN9 B DUAL PHONO LEFT RIGHT TAPE RETURN RIGHT TAPE RETURN LEFT 1 2 3 4 5 6 7 8 J2 H8 2 54mm 90 5V INPUT TAPE SELECT SWITCH MUTE MICROCONTROLLER BOARD CONNECTOR OUTPUT RELAY DC OFFSET DATA CLOCK STROBE 2 3 5 6 A B C D...

Page 11: ...72 47K R73 47K R74 47K Q2 BC337 AMP MUTE AMP MUTE 28V HI MUTE SW2 A SW DPDT SW2 B SW DPDT SPEAKER B ON OFF RSW1 RSW2 R L GND LSW1 LSW2 2 4 3 1 7 8 5 CN1 HEADPHONE JACK R61 220R 3W C R62 470R 1W C R63 220R 3W C R64 470R 1W C 1 2 CN2 A SPKR 4 WAY 4 3 CN2 B SPKR 4 WAY 5 6 CN2 C SPKR 4 WAY 8 7 CN2 D SPKR 4 WAY LEFT SPEAKER A LEFT SPEAKER B RIGHT RIGHT 3 4 5 RL1 B 12V 8A RELAY 6 7 8 RL1 C 12V 8A RELAY ...

Page 12: ...A04 10 D5 1N4002 D6 1N4002 D7 1N4002 D8 1N4002 J7 TERMINAL green J9 TERMINAL purple J10 TERMINAL blue C45 1000u 35V C46 470u 35V VI 1 VO 3 GND 2 U5 7805 C47 47u 16V C48 47n poly VI 1 VO 3 GND 2 U8 7815 VI 2 VO 3 GND 1 U9 7915 C49 100u 25V C50 100u 25V 5V C51 47n poly C52 47n poly C53 47n poly 15V 15V FROM TRANSFORMER 20V J3 TERMINAL J4 TERMINAL J8 TERMINAL MAINS SWITCH PCB OPAMP SUPPLY MICROCONTRO...

Page 13: ... 1 8 4 U2 A NE5532 5 6 7 U2 B NE5532 R CH IN L CH IN POWER AMP RIGHT POWER AMP LEFT R52 150k R54 150k R59 150k R60 150k 1 3 2 VR1 A 20K MOTORISED DUAL POT 4 6 5 VR1 B 20K MOTORISED DUAL POT 4 6 5 VR4 B MN20K BALANCE 1 3 2 VR4 A MN20K BALANCE 1 3 2 VR2 A B20K LINEAR 4 6 5 VR2 B B20K LINEAR 1 3 2 VR3 A B20K LINEAR 4 6 5 VR3 B B20K LINEAR ZERO LOSS WHEN CENTRAL TONE CONTROL VOLUME BALANCE CONTROL TRE...

Page 14: ...Cambridge Azur 340A Intergrated Amplifier AP14476 4 Main PCB Board Layout Top Side To enhance viewing please print to A3 14 ...

Page 15: ...Cambridge Azur 340A Intergrated Amplifier AP14476 4 Main PCB Board Layout Bottom Side To enhance viewing please print to A3 15 ...

Page 16: ...h 3 0mm 2 C9 C15 330pF Polyester Pitch 5 0mm 2 C1 C10 10nF X1 Mains rated Ceramic Pitch 5 0mm 2 C34 C35 EMC Suppression 47nF Polyester Pitch 5 0mm 10 C4 C5 C7 C8 C16 C17 C48 C51 C53 100nF Ceramic 100V Pitch 5 0mm 3 C2 C26 C36 150nF Polyester Pitch 5 0mm 2 C6 C11 470nF X2 Mains rated Polypropylene Pitch 22 5mm 1 C28 EMC C44 is alternative fit for 27 5 mm pitch 10uF Electrolytic 16V Pitch 2 0mm 4 C3...

Page 17: ...se to PCB M3 x 10 Taptite Power Amp IC Fix Screw 2 Fix IC tab to heatsink M3 Power Amp IC Insulating Bush 2 Insulate fix screw from IC tab Precut washer type K177 NA 617 Power Amp IC Insulating Washer 2 K177 is the material type NA means no adhesive Self adhesive version would be technically acceptable Dwg no AP14899 1 Power Amp Heatsinks 2 Black anodised 6510 150310 000 Pressure board Power Amp I...

Page 18: ...0V TV 8 1 SW3 mains switch Gerber AP14477 4 1 Schematic AP14476 4 Gerber file is AP14477 4 PCB Construction details AP14478 4 Please mark board POP REV A NOTES Note 4 All capacitors 85 degC rating or above Note 1 C23 C39 Components not fitted Note 2 All resistors larger than 0 25W to be stood off the board by 5mm Note 3 All resistors 1 tolerance 18 ...

Page 19: ...Cambridge Audio Azur 340A Amplifier IC Pin Layout Details Front Panel PCB PIC16F72 I SP U1 BA6218 U2 TSOP1836 37 U3 19 ...

Page 20: ...Main PCB NE5532 U1 U2 TC9163AF U4 LM3886T U6 U7 20 ...

Page 21: ...SCREENED WITH ARTWORK AP13679 2 CAMBRIDGE NEW RANGE AMP 7mm TAC SWITCH BUTTON 6 POSITION IN PLACE ON THE FRONT PANEL CAMBRIDGE NEW RANGE AMP 7mm PUSH SWITCH BUTTON 2 POSITION IN PLACE ON THE FRONT PANEL PY531 CAMBRIDGE NEW RANGE FOOT MOULDING 4 POSITION IN PLACE ON BOTTOM PANEL PY641 340A Top Panel Black 1 POSITION ON TOP OF THE PRODUCT PY515 M2 6 x 8 MC Torx Recessed Black 8 TOP PANEL SCREWS Camb...