Cambridge Audio Azur 540A V2.0 Service Manual

Other manuals for Azur 540A V2.0: User Manual
Manual is about: V2.0 Integrated amplifier

Summary of Azur 540A V2.0

  • Page 1

    Gallery court hankey place london se1 4bb uk tel: +44 (0)20 7940 2200 fax: +44 (0)20 7940 2233 540a v2 issue date: 31 st march 2006 _________________________________________________________________________________________ service manual _______________________________________________________________...

  • Page 2: 540A V2.0 Service Manual

    540a v2.0 service manual table of contents safety precautions & important notes 3 exploded diagram 4 input pcb schematic (power supply) 5 input pcb schematic (buffers and switches) 6 input pcb schematic (tone control) 7 input pcb schematic (protection circuitry) 8 input pcb schematic (headphone driv...

  • Page 3

    Safety precautions & important notes 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 produ...

  • Page 4

    21 17 25 10 18 (a) 8 19 (b) 20 22 16 12 23 6 14 3 1 2 4 24 5 15 11 9 13 7 drawing ref ap part factory part number description 1 py687 6560-150001-000a volume knob aluminium skin ap133601 silver (use with py680+py681) 1 py686 6560-150001-000 volume knob aluminium skin ap133601 black (use with py680+p...

  • Page 5

    Cambridge audio azur 540a v2.0 amplifier ap17649/5 input pcb schematic (power supply) vi 1 vo 3 gnd 2 u3 l7805 c26 47u 16v vi 1 vo 3 gnd 2 u4 l7815 vi 2 vo 3 gnd 1 u2 l7915 +5v dgnd d2 1n4004 d3 1n4004 d4 1n4004 d5 1n4004 c35 100n 100v x7r c37 100n 100v x7r c27 100n 50v x7r c25 100n 50v x7r c31 47n ...

  • Page 6

    Cambridge audio azur 540a v2.0 amplifier ap17649/5 input pcb schematic (buffer and switches) abus gnd general notes 1. 2. 3. 4. 5. 2 3 1 8 4 u9:a ne5532n r112 220r 1/8w r111 220r 1/8w 6 5 7 u9:b ne5532n 2 3 1 8 4 u12:a ne5532n 6 5 7 u12:b ne5532n -15 v +15v +15v -15v +15v -15v u6 u6 sw gnd lch in rc...

  • Page 7

    Cambridge audio azur 540a v2.0 amplifier ap17649/5 input pcb schematic (tone control) general notes 1. 2. 3. 4. 5. R20 4k7 r23 1k1 r24 1k1 r17 2k2 r19 2k2 sw2:a sw-dpdt tone defeat out -15v +15v r36 2k2 r35 2k2 r22 4k7 r26 1k1 r25 1k1 r18 2k2 r21 2k2 sw2:b sw-dpdt tone defeat -15v +15v r37 2k2 r38 2...

  • Page 8

    Cambridge audio azur 540a v2.0 amplifier ap17649/5 input pcb schematic (protection circuitry) +5volts r66 1k for 1ma r64 10k r67 100r r65 2r7 dgnd 3 2 1 8 4 u8:a lm393 d7 1n4148 +5v speaker short circuit tester r69 4k7 (open collector output) senses a dc resistance of 2 ohms or less d6 1n4004 pic vi...

  • Page 9

    Cambridge audio azur 540a v2.0 amplifier ap17649/5 input pcb schematic (headphone driver) main +15v -15v r54 10r r53 10r 6 5 7 u1:b ne5532n r8 1r r6 1r r41 2k7 r40 3k3 r43 560r r42 560r r39 5k6 r7 5k6 q6 bd139 q5 bd139 q4 bd140 r9 180r main rsw1 rsw2 r l gnd 2 3 1 7 8 cn1 headphone jack main c96 47n...

  • Page 10

    Cambridge audio azur 540a v2.0 amplifier ap17649/4 input pcb board layout (top side) super hi-fidelity ultra linear preamp stage 86-756-8687998 to enhance viewing, please print to a3 10

  • Page 11

    Cambridge audio azur 540a v2.0 amplifier ap17649/4 input pcb board layout (bottom side) 86-756-8687998 to enhance viewing, please print to a3 11.

  • Page 12

    Ap17652/5 ap part no value description/type factory part no. Qty component ident notes resistors 1r 0.25w metal film 4 r1, 3, 6, 8. 2r7 0.25w metal film 1 r65 see input schematic (protection circuitry) 10r 0.25w metal film 2 r53, 54 22r 0.25w metal film 2 r33, 34 100r 0.25w metal film 5 r49, 52, 67,...

  • Page 13

    Ap17652/5 ap part no value description/type factory part no. Qty component ident notes cambridge audio azur 540a v2.0 amplifier input pcb assembly bom 100uf 25v 105 degree polarised electrolytic 2 c28, 98. 470uf 25v polarised electrolytic 2 c94, 97 1000uf 35v polarised electrolytic 1102-102034-000 2...

  • Page 14

    Cambridge audio azur 540a v2.0 amplifier ap17977/2 voltage select switch pcb schematic j2 from j4 (common) sw1 voltselect rf1002b 115/230v marking j1 brown (230v) j3 black (115v) 86-756-8687998 to enhance viewing, please print to a3 14.

  • Page 15

    Cambridge audio azur 540a v2.0 amplifier ap17977/2 voltage select switch pcb layout (top side) 86-756-8687998 to enhance viewing, please print to a3 15.

  • Page 16

    Cambridge audio azur 540a v2.0 amplifier ap17977/2 voltage select switch pcb layout (bottom side) 86-756-8687998 to enhance viewing, please print to a3 16.

  • Page 17

    Cambridge audio azur 540a v2 voltage selector pcb assembly bom ap17980/1 value description/type qty component ident factory part number notes connectors rf1002b voltage selector 1 sw1 2406-010200-000 note: resistors, capacitors and 'other' electronic components are not usually stocked by the manufac...

  • Page 18

    Cambridge audio azur 540a v2.0 amplifier ap17657/1 mains pcb schematic earth 3 4 5 rl1:b relay 6 7 8 rl1:c relay fu5 20mm t6.3al mains toroid transformer j1 terminal j2 terminal j3 terminal j4 terminal j5 terminal j6 terminal j7 terminal j13 blue/white j15 to volt select l n e cn3 iec-soc 1 2 rl1:a ...

  • Page 19

    Cambridge audio azur 540a v2.0 amplifier ap17657/1 front panel pcb schematic temp mclr chassis crs1 freq=4mhz 1 2 cn4 h2 2.54mm 90 motor c4 100n fin 1 gnd1 2 rin 3 nc 4 gnd2 5 vcc 6 out2 7 com 8 out1 9 u1 ba6218 +5 v dgnd r17 10k r21 10k r16 10k +5v dgnd dgnd c7 100n r19 10k d 2 clk 3 stb 1 oe 15 q0...

  • Page 20

    Cambridge audio azur 540a v2.0 amplifier ap17657/1 front panel & mains pcb layout (top side) 86-756-8687998 to enhance viewing, please print to a3 20

  • Page 21

    Cambridge audio azur 540a v2.0 amplifier ap17657/1 front panel & mains pcb layout (bottom side) 86-756-8687998 to enhance viewing, please print to a3 21.

  • Page 22

    Ap17660/1 ap part no. Value description factory part no. Qty component ident notes resistors 220r 0.25w metal film 5 r5, 7, 12, 20, 23 10k 0.25w metal film 540a 12 640a 13 r1, 4, 6, 8, 13, 16-19, 21, 22, 25, 26 22r 0.25w metal film 3 r9-11 47r 0.25w metal film 2 r14, 15 2r2 0.25w metal film 1 r3 1k ...

  • Page 23

    Cambridge audio azur 540a v2.0 amplifier ap17653/2 amp pcb schematic (right channel) 5 6 cn7:c spkr 4-way r amp 1 2 cn4 h2 2.54mm signal in d19 1n4004 d20 1n4004 +45v r -45v r r66 4r7 3w ww r70 100r r60 100r r46 150r 8th r73 2k2 8th r amp r51 150r 8th r55 100r r53 100r r58 10k r56 470r 8th r input d...

  • Page 24

    Cambridge audio azur 540a v2.0 amplifier ap17653/2 amp pcb schematic (protection) le1 le2 r34 2k2 8th r26 2k2 8th r84 470r 8th r102 47k 8th r74 18k 8th d16 5v1 zener 400mw dgnd pic vi/short +45v r r79 18k 8th d18 1n4148 speaker test 1 2 rl2:a 12v 8a relay speaker a relay r107 1k 8th r101 47k 8th r10...

  • Page 25

    Cambridge audio azur 540a v2.0 amplifier ap17653/2 amp pcb schematic (power amp) +45v p -45v p general notes 1. 2. 3. 4. 5. D13 1n5402 d14 1n5402 d12 1n5402 d15 1n5402 r psu +45v l -45v l r1 100r l psu j1 red j2 yellow j3 orange j4 chassis c48 100n 100v mceramic c46 no stuff c47 no stuff d3 1n5402 d...

  • Page 26

    Cambridge audio azur 540a v2.0 amplifier ap17653/2 amp pcb schematic (left channel) 8 7 cn7:d spkr 4-way l amp d21 1n4004 d22 1n4004 +45v l -45v l r28 4r7 3w ww r32 100r r15 100r r3 150r 8th r35 2k2 8th l amp r6 150r 8th r10 100r r8 100r r13 10k r11 470r 8th d23 ** 2k7 1/8w res r24 2k2 8th l amp r18...

  • Page 27

    Cambridge audio azur 540a v2.0 amplifier ap17653/1 amp pcb board layout (top side) 86-756-8687998 to enhance viewing, please print to a3 27.

  • Page 28

    Cambridge audio azur 540a v2.0 amplifier ap17653/1 amp pcb board layout (bottom side) 86-756-8687998 to enhance viewing, please print to a3 28.

  • Page 29

    Ap17656/2 ap part no value description reference qty factory part no comments capacitors 100nf 100v monolithic ceramic c15,c48,c59,c71 540a - 3 640a - 4 1106-104064-001 540a only c48 is not fitted 1nf 63v polypropylene film c4 1 47uf 16v non polarised electrolytic c5,c18,c34,c50 4 1105-470014-000 47...

  • Page 30

    Ap17656/2 ap part no value description reference qty factory part no comments cambridge audio azur 540a v2 amp pcb assembly bom 100k 8th r2,r22,r31,r38,r42, r47,r63,r69,r86,r8 8,r96,r99,r109,r112 14 150r 8th r3,r6,r46,r51 4 18r 8th r4,r49 2 1k 8th r5,r19,r40,r50,r10 3,r107 6 91k 8th r25,r33,r62,r71 ...

  • Page 31

    Ap17656/2 ap part no value description reference qty factory part no comments cambridge audio azur 540a v2 amp pcb assembly bom py537 mpsa42 npn high voltage q9,q10,q12,q13,q 17-q20,q31,q36- q38,q40,q41,q43- q45 17 1300-420000-100 mpsa14 npn darlington q34,q35 2 1300-140000-100 note: resistors, capa...

  • Page 32

    Cambridge audio azur 540a v2.0 amplifier ap17708/4 abus module pcb schematic 5 6 7 u6:b njm5532m 3 2 1 8 4 u6:a njm5532m c20 100n 50v x7r +24v r48 47r r47 47r r46 150k r44 120k c19 10p 50v np0 r20 150k c14 10p 50v np0 abus gnd r42 150k abus gnd q4 bc327-25 r29 100r r28 100r r33 4k7 r35 10k r34 27k r...

  • Page 33

    Cambridge audio azur 540a v2.0 amplifier ap17708/4 abus module pcb layout (top side) cn4 cn3 cn6 cn7 cn5 cn8 c30 r49 c26 f2 f1 r52 d1 d2 u7 c24 r13 r16 u6 u5 u2 c6 c5 c20 r20 c14 r48 c16 c13 c17 c19 r47 r8 r11 q2 r6 q3 r37 r12 d4 d3 d6 d5 u3 u4 r7 c10 r17 c8 r18 c12 c7 c15 r27 r26 c29 r22 r23 r44 r4...

  • Page 34

    Cambridge audio azur 540a v2.0 amplifier ap17708/4 abus module pcb layout (bottom side) 86-756-8687998 to enhance viewing, please print to a3 34.

  • Page 35

    Ap17711/1 ap part no value description factory part no qty component ident notes 2r2 0.125w metal film 1 r4 47r 0.125w metal film 6 r17, 18, 39, 40, 47, 48 100r 0.125w metal film 8 r5, 9, 10, 14, 15, 28, 29 220r 0.125w metal film 2 r6, 52 470r 0.125w metal film 1 r37 1k 0.125w metal film 1 r53 4k7 0...

  • Page 36: Ic Pin Layout Details

    Cambridge audio azur 540a amplifier v2.0 ic pin layout details input pcb bd140 (q1 & q4) bd139 (q2, q3, q5 & q6) bc327 (q7) bc337 (q8) mpsa14 (q9) ne5532 (u1, u5, u6, u7, u9, u10, u12, u13, u14, u15, u16, u17 & u18) 36.

  • Page 37

    7915 (u2) 7805 (u3) 7815 (u4) lm393 (u8) tc9163af (u11) 37.

  • Page 38

    Power amp pcb sap15py (u1 & u3) sap15ny (u2 & u4) 2sc2240gr (q1, q6, q7, q15, q23, q24, q26 & q32) mje350 (q2 & q27) 38.

  • Page 39

    Mpsa92 (q3, q4, q8, q25, q28, q29, q30, q33, q39 & q42) 2sa970gr (q5, q11, q14, q16, q21 & q22) mpsa42 (q9, q10, q12, q13, q17, q18, q19, q20, q31, q36, q37, q38, q40, q41, q43, q44 & q45) mpsa14 (q34 & q35) 39.

  • Page 40

    Front panel & mains pcb mpsa14 (q4) bc337 (q1 & q2) pic16f72-i/sp ba6218 (u1) m74hc4094 (u3) 40

  • Page 41

    Tsop1836 (u4) a-bus pcb bc337 (q1, q2, q3 & q5) bc327 (q4) 4011 (u1) tsop1836 (u2) 41.

  • Page 42

    Tsop1837 (u3) op4n25 (u4) njm5532 (u5 & u6) 7812 (u7) 42.