Cambridge Audio Azur 640A, Service Manual

Page 1: ...Impedance 47k Ohms Loudspeaker 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 100Hz Treble 10dB 10kHz Signal to Noise Ratio No weighting 92dB Slew rate into 8 ohms 40V uS Max Power Consump...

Page 2: ...Power Amp Schematic Power Supply 17 Power Amp Schematic Protection 18 Power Amp Schematic Left Channel 19 Power Amp Schematic Right Channel 20 Power Amp PCB Layout Top Side 21 Power Amp PCB Layout Bottom Side 22 Power Amp PCB BOM 23 25 Speaker Output Schematic 26 Speaker Output PCB Layout Top Side 27 Speaker Output PCB Layout Bottom Side 28 Speaker Output PCB BOM 29 Mains Input Schematic 30 Mains ...

Page 3: ...ts 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 ch...

Page 4: ...channel individually they should be adjusted 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 ...

Page 5: ... AMP VOLUME KNOB 1 PY581 AP12740 2 CAMBRIDGE NEW RANGE AMP FRONT PANEL PUNCHED AND PRINTED 1 SCREENED WITH ARTWORK AP13679 2 AP12935 1 CAMBRIDGE NEW RANGE AMP IR LENS 1 GLUED IN PLACE ON THE FRONT PANEL AP12746 2 CAMBRIDGE NEW RANGE AMP SUB PLATE 1 FASTENEND IN PLACE INBETWEEN THE LEDGES ON THE FRONT PANEL AP12931 1 CAMBRIDGE NEW RANGE AMP LIGHTGUIDE 5 FASTEN TO SUBPLATE M3 X 6 POZI PAN STP SCREW ...

Page 6: ...METAL BOTTOM PLATE 1 TO FIT UNDER BOTTOM PLATE ON M6 BOLT M6 LOCK WASHER 1 PLACE ABOVE TRANSFORMER ON M6 BOLT TRANSFORMER METAL TOP PLATE 1 PLACE ON TOP OF TRANSFORMER M6 NUT STANDARD 1 USED TO FIX ABOVE BOLT INPUT PCB ASSEMBLY 1 FIXES IN THE CORRECT POSITION ONTO THE PLASTIC PCB STANDOFFS AP12715 4 BARE INPUT PCB 1 M2 6 X 6 POZI PAN MACHINE SCREW 10 TO AFFIX BOTTOM PANEL TO SIDE FRONT AND REAR PA...

Page 7: ...ST CONNECTORS SELF ADHESIVE CABLE TIE FIXING PAD 19mm X 19mm 3 2X SIDE PANEL 1X REAR PANEL TO ATTACH AP13395 1 LOOM TO SIDE OF CHASSIS CABLE TIE 2 5mm X 100mm 10 PLEASE FOLLOW EXAMPLE ON MANUFACTURING SAMPLE UNIT OR USE AS NECESSARY AP13340 1 A600 LIDDING TAPE FOR FRONT AND REAR PANELS 2 FIX TO THE CORRECT SURFACES FOR LID AP13342 1 A600 LIDDING TAPE FOR SIDE PANELS 2 FIX TO THE CORRECT SURFACES F...

Page 8: ...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 SWITCHING RSW1 RSW2 R L GND LSW1 LSW2 2 4 3 1 7 8 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 1 3 2 VR1 A 2...

Page 9: ... PHONO 6 CN12 D QUAD PHONO 2 1 CN13 A QUAD PHONO 5 4 CN12 C QUAD PHONO 3 2 1 8 4 U3 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 poly C7 47n poly C8 47n p...

Page 10: ...Cambridge Audio Azur 640A Integrated Amplifier AP12714 5 Input Tone PCB Layout Top Side To enhance viewing please print to A3 10 ...

Page 11: ...Cambridge Audio Azur 640A Integrated Amplifier AP12714 5 Input Tone PCB Layout Bottom Side To enhance viewing please print to A3 11 ...

Page 12: ...C19 C20 C24 C27 150n POLY 50 100V 5mm PITCH CAPACITOR 2 C6 C11 10u 35V NON POLAR ELECTROLYTIC CAPACITOR 6 C14 C25 C28 C29 C30 C31 100u 25V ELECTROLYTIC CAPACITOR 2 C32 C33 PY487 NJU 7313 AUDIO SWITCH IC 1 U1 PY108 NE5532 OP AMP 5 U2 U3 U4 U5 U6 4 WAY JST CONNECTOR 2 54mm PITCH 3 CN1 CN22 6 WAY JST CONNECTOR 2 54mm PITCH 1 CN3 ZUANBAO CK 6 35 08A SILVER BEZEL HEADPHONE JACK 1 CN2 ZUANBAO AV2 8 4 9 ...

Page 13: ...4 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 D4 CHANNEL LED D5 CHANNEL LED D6 CHANNEL LED D7 CHANNEL LED SW3 STANDBY SW4 CD SW5 TUNER SW6 AV SW7 PHONO AUX SW9 TAPE MON SW10 DVD D8 Red LED protection lead mounted 5V 3 OPT 1 GND 2 U9TSOP18 IR RECEI R35 10k 5V HEADPHONE HEADPHONE C1 100n 5V DGND R1 220R strobe data clock clock data stro...

Page 14: ...Cambridge Azur 640A Integrated Amplifier AP12711 9 Front Panel PCB Layout Top Side To enhance viewing please print to A3 14 ...

Page 15: ...Cambridge Azur 640A Integrated Amplifier AP12711 9 Front Panel PCB Layout Bottom Side To enhance viewing please print to A3 15 ...

Page 16: ...D DIFFUSED RED LED 1 D8 TO BE FITTED TO CABLE AS PER DRAWING AP13388 3 AND THEN GLUED INTO THE PROTECTION LIGHT GUIDE FITTED TO THE SUB PANEL 2 WAY JST CONNECTOR 2 54mm PITCH 90 DEGREE MOUNTED 1 CN7 4 WAY JST CONNECTOR 2 54mm PITCH 90 DEGREE MOUNTED 1 CN1 8 WAY JST CONNECTOR 2 54mm PITCH 90 DEGREE MOUNTED 1 CN2 9 WAY JST CONNECTOR 2 54mm PITCH 90 DEGREE MOUNTED 1 CN6 TACTILE SWITCH 1 SW3 LINK WIRE...

Page 17: ... J4 CHASSIS D13 1N4002 D14 1N4002 D16 1N4002 D15 1N4002 J13 TERMINAL green J14 TERMINAL purple J15 TERMINAL blue C53 470u 35V C54 100u 35V C57 47n poly C58 47n poly VI 1 VO 3 GND 2 U87805 C59 47u 16V C56 47n poly VI 1 VO 3 GND 2 U9 7815 VI 2 VO 3 GND 1 U10 7915 C60 100u 16V C61 100u 16V 5V J17 TERMINAL J18 TERMINAL J16 J20 1 2 CN4 H2 2 54mm PHONO PSU J19 YELLOW J21 YELLOW WIRE LINK C55 47n poly LK...

Page 18: ...45 47k R47 18k D7 4V7 Zener 400mW g1 PIC OVERCURRENT SHORT 45V R46 4k7 8th R48 18k C27 4 7n D6 1N4148 Q5 BC337 R5 4k7 R4 4k7 8th R2 10k 8th R3 10k 8th digital 5V 1 C1 1u 16V PIC OVERCURRENT SHORT PIC DC PIC CLIP PIC TEMP PIC SPEAKER digital 5V 1 PIC SPEAKER 15V C15 220p D23 1N4148 D24 1N4148 ROCLIP LOCLIP D27 1N4148 D28 1N4148 ROCLIP LOCLIP R49 47k 3 2 7 4 6 1 8 5 U6 NE5534 C36 100n C37 100n 15V 1...

Page 19: ...10u NP 16V R37 330k 8th C24 100n C13 10u NP 16V C9 33p WIRE3 R18 1k LK6 LINK R19 18k R100 0 22R 3W R22 0 22R 3W WIRE4 RE1 RE2 RICLIP RFCLIP J6 TERMINAL J8 TERMINAL LK8 LINK WIRE LINK WIRE LINK E S C B D 5 4 3 1 2 U3 SAP15N E S C B D 5 1 3 2 4 U2 SAP15P R40 10R 8th C19 47n poly R29 1k R42 10k 8th R39 10k 8th C22 47u 50V R17 100R signal1 signal1 Q12 MJE340 45V2 45V2 RO Q13 MPSA13 Q15 MPSA92 93 Q18 M...

Page 20: ...C39 10u NP 16V R78 330k 8th C28 100n C50 33p C47 10u NP 16V R55 1k R69 0 22R 3W R52 0 22R 3W LE1 LE2 R54 18k LK22 LINK LICLIP LFCLIP WIRE2 J10 TERMINAL J12 TERMINAL LK9 LINK WIRE LINK WIRE LINK WIRE1 E S C B D 5 1 3 2 4 U4 SAP15P E S C B D 5 4 3 1 2 U5 SAP15N R74 1k C44 5p R75 10k 8th R77 10k 8th C42 47u 50V R84 10R 8th C40 47n poly R56 100R signal2 Q25 MJE340 45V3 45V3 LO Q23 MPSA13 Q30 MPSA92 93...

Page 21: ...Cambridge Azur 640A Integrated Amplifier AP12707 6 Power Amp PCB Layout Top Side To enhance viewing please print to A3 21 ...

Page 22: ...Cambridge Azur 640A Integrated Amplifier AP12707 6 Power Amp PCB Layout Bottom Side To enhance viewing please print to A3 22 ...

Page 23: ...ISTOR 4 R62 R63 R104 R105 330k 0 125W 1 METAL FILM RESISTOR 2 R37 R78 1M 0 125W 1 METAL FILM RESISTOR 4 R12 R13 R60 R61 47R 0 5W 10 CERMET VERTICAL PRESET 2 54mm PITCH 2 R68 R116 47R 0 25W 1 METAL FILM RESISTOR 1 R97 100R 0 25W 1 METAL FILM RESISTOR 8 R11 R17 R21 R51 R56 R70 R95 R99 150R 0 25W 1 METAL FILM RESISTOR 8 R27 R28 R41 R43 R71 R72 R96 R98 1k 0 25W 1 METAL FILM RESISTOR 5 R18 R29 R55 R74 ...

Page 24: ...C63 PD077 NE5534 SINGLE OP AMP 2 U1 U6 PY010 SAP15NO POWER TRANSISTOR 2 U3 U5 PY016 SAP15PO POWER TRANSISTOR 2 U2 U4 PY539 LM393 DUAL COMPARATOR 1 U7 7805 5V REGULATOR 1 U8 7815 15V REGULATOR 1 U9 7915 15V REGULATOR 1 U10 PY219 BC327 PNP TRANSISTOR 2 Q1 Q2 PY214 BC337 NPN TRANSISTOR 4 Q3 Q4 Q5 Q6 PY021 MPAS92 93 PNP TRANSISTOR 9 Q7 Q8 Q15 Q16 Q21 Q28 Q29 Q30 Q33 PY013 MPAS42 43 NPN TRANSISTOR 10 Q...

Page 25: ...80 1 CAMBRIDGE AUDIO AZUR 640 AMP HEATSENSOR INSULATION TOP SHEET 1 TO INSULATE AP12932 1HEAT SENSOR BRACKET FROM Q20 AND FROM HEATSINK ASSEMBLY APPLY HEATSINK COMPOUND AP13581 1 CAMBRIDGE AUDIO AZUR 640 AMP HEATSENSOR INSULATION BOTTOM SHEET TO INSULATE AP12932 1HEAT SENSOR BRACKET FROM Q20 AND FROM HEATSINK ASSEMBLY APPLY HEATSINK COMPOUND M3 X 5 POZI PAN MACHINE SCREW BLACK 1 USED TO FIX TRANSI...

Page 26: ...RMINAL LK24 LINK J26 TERMINAL headphone J27 TERMINAL headphone 5 6 CN202 C SPKR 4 WAY R2642R2 3W 3 4 5 RL1 B 12V 8A RELAY SPEAKER TEST J5 TERMINAL J7 TERMINAL J22 speakerB 1 2 CN202 A SPKR 4 WAY J25 TERMINAL LK25 LINK J28 TERMINAL headphone L202 To AP13772 1 LEFT RIGHT SPEAKER TEST 1 2 RL1 A 12V 8A RELAY D5 1N4002 Q17 MPSA13 R33 1k 8th R32 10k 8th SPEAKER RELAY 1 2 3 4 CN3 H4 2 54mm D32 1N4002 To ...

Page 27: ...Cambridge Azur 640A Integrated Amplifier AP12707 6 Speaker Output PCB Layout Top Side To enhance viewing please print to A3 27 ...

Page 28: ...Cambridge Azur 640A Integrated Amplifier AP12707 6 Speaker Output PCB Layout Bottom Side To enhance viewing please print to A3 28 ...

Page 29: ... R33 10k 0 125W 1 METAL FILM RESISTOR 1 R32 PY536 MPSA13 DARLINGTON NPN TRANSISTOR 1 Q17 1N4004 RECTIFIER DIODE 1 D5 4 WAY JST CONNECTOR 2 54mm PITCH 1 CN3 LINK WIRE 24SWG 20mm LONG 2 LK24 LK25 PY594 12V 8A CONTACTS RELAY 1 RL1 FORWARD FRM10N 2C2S 12V 8A USD0 61 10K OR TYH HG4509 12V 8A USD0 66 5K 25TURN 19AWG OUTPUT INDUCTOR 2 W201 W202 AS PER DRAWING AP13772 1 ZUANBAO WP8 21A 8 WAY SPEAKER SOCKE...

Page 30: ...AL J3 TERMINAL J4 TERMINAL J5 TERMINAL J6 TERMINAL J7 TERMINAL J8 TERMINAL J9 TERMINAL J10 TERMINAL J11 TERMINAL J12 TERMINAL TRANSFORMER CONNECTIONS J13 BLUE WHITE J15 BROWN BLACK L N E CN3 IEC SOC 1 2 RL1 A RELAY R25 1k R26 10k 1 2 3 CN4 H3 2 54mm D10 1N4004 C5 X1 10n C6 X1 10n FU4 20MM F500mAL FU5 20MM F500mAL Q1 MPSA13 D11 BZX79C3V9 C2 X2 680N SUPPRESSION To enhance viewing please print to A3 ...

Page 31: ...Cambridge Azur 640A Integrated Amplifier AP12711 9 Mains Input PCB Layout Top Side To enhance viewing please print to A3 31 ...

Page 32: ...Cambridge Azur 640A Integrated Amplifier AP12711 9 Mains Input PCB Layout Bottom Side To enhance viewing please print to A3 32 ...

Page 33: ...1 D11 1N4004 RECTIFIER DIODE 1 D10 METAL MAINS TERMINAL EYELETS 2 J13 J15 AS PER PCB AP11012 3 3 WAY JST CONNECTOR 2 54mm PITCH 1 CN4 IEC MAINS SOCKET PC1287 1 CN3 FIRST TECH AS PER D500 SE CD PLAYER FUSE HOLDERS WITH SAFETY COVERS 5 FU1 FU2 FU3 FU4 FU5 PY596 FUSE F1 6AL 2 FU4 FU5 PY361 FUSE F6 3AL 2 FU1 FU2 PY595 FUSE T3 15AL 1 FU3 PY594 12V 8A CONTACTS RELAY 1 RL1 FORWARD FRM10N 2C2S 12V 8A USD0...

Page 34: ...Cambridge Audio Azur 640A 540A Amplifier IC Pin Layouts Control PCB PIC16C57C U5 BA6218 U6 34 ...

Page 35: ...74HC4094 U7 35 ...

Page 36: ...Input PCB NJU7313 U1 NE5532 U2 U3 U4 U5 U6 36 ...

Page 37: ...Power PCB NE5534 U1 U6 LM393 U7 37 ...

Page 38: ...SAP15NO U3 U5 SAP15PO U2 U4 38 ...

Page 39: ...TTON 1 POSITION IN PLACE ON THE FRONT PANEL 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 PY532 CAMBRIDGE AUDIO NEW RANGE TOP PANEL WITH VENTS 1 POSITION ON TOP OF THE PRODUCT PY515 M2 6 x 8 MC Torx ...

Page 40: ...5V 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 poly 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...

Page 41: ... NE5532 15V 15V 12V 12V LK2 R21 220K R23 220K R24 1k R25 1k R26 1k R27 220K R28 220K R29 1k R30 1k R31 1k R17 220K R32 220K R33 220K R34 1k R35 1k R36 1k R37 1k R38 1k R39 1k R40 220K R41 220K 15V 15V 30V C2 47n poly C3 47n poly C4 47n poly C5 47n poly 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...