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Cambridge Audio Azur 640A Service Manual

Manual is about: V2.0 Integrated amplifier

Summary of Azur 640A

  • Page 1

    Gallery court hankey place london se1 4bb uk tel: +44 (0)20 7940 2200 fax: +44 (0)20 7940 2233 640a integrated amplifier issue date: 16 th december 2003 (revised may 2008) service manual – ap14676/1 specifications: power output: 65 watts into 8 ohms 100 watts into 4 ohms input impedance: 47k ohms lo...

  • Page 2

    640a service manual table of contents safety precautions & important notes 3 amplifier bias set-up 4 main assembly bom (silver unit) 5 – 7 input & tone pcb schematic (tone control) 8 revised: input & tone pcb schematic (input select) 9 input & tone pcb layout (top side) 10 input & tone pcb layout (b...

  • Page 3

    Safety precautions & important notes 1.Check that the rear of the product indicates the correct supply voltage for you 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...

  • Page 4

    Cambridge audio azur 640a amplifier bias setup to set the bias on the 640a amplifier: measure the voltage across r22 and r100 (left 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 repea...

  • Page 5

    Ap13133/6 ap part no. Drawing no description qty comments new cambridge amp packed uk version 1 ap13074/1 poly endcap packaging 2 ap13075/1 carton packaging w/handle 1 printed to artwork ap………… ap136131/1 cambridge audio non-woven blue bag for remote 1 pack remote control inside, cambridge new style...

  • Page 6

    Ap part no. Drawing no description qty comments ap13453/2 a600 input pcb to front panel switch pcb 1 attach front panel pcb to input pcb as per drawing cable tie 2.5mm x 100mm 2 attach cable loom to sub panel ap13391/2 a600 volume motor cable 1 attach volume pot motor to front panel switch pcb ap133...

  • Page 7

    Ap part no. Drawing no description qty comments ap13389/2 a600 amp pcb to input pcb power cable 1 fit as per drawing - jst connectors ap13393/2 a600 amp pcb to mains pcb cable 1 fit as per drawing - jst connectors ap13396/2 a600 input pcb to amp pcb signal cable 1 fit as per drawing - jst connectors...

  • Page 8

    Cambridge audio azur 640a integrated amplifier ap12714/5 input & tone pcb schematic (tone control) c1 330p poly r1 22k r2 4k7 r3 4k7 r4 8k2 r11 8k2 c6 150n poly c9 5p sw1:a sw-dpdt defeat -15v +15v r12 10k r13 10k c10 330p poly r20 22k r42 4k7 r43 4k7 r44 8k2 r45 8k2 c11 150n poly c15 5p sw1:b sw-dp...

  • Page 9

    Cambridge audio azur 640a integrated amplifier ap12714/6 input & tone pcb schematic (input select) (production change in 2003 - if r48/r56 fail, please refer to service bulletin: tnbc-0006) cd in l tuner in l dvd in l av in l cd in r tuner in r dvd in r av in r phono/aux in l phono/aux in r tape out...

  • 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

    Cambridge azur input and tone pcb bom ap131336 ap part no. Drawing no description qty designator comments ap12715/5 bare input pcb 1 220r 3w carbon film resistor 2 r61, r63 470r 1w carbon film resistor 2 r62, r64 680r 1w carbon film resistor 1 r55 56r 0.25w metal film resistor 2 r8, r9 100r 0.25w me...

  • Page 13

    Cambridge azur 640a integrated amplifier ap12711/9 front panel schematics temp dc clip speaker relay overcurrent/short standby relay remote in rb7 17 rb6 16 rb5 15 rb4 14 rb3 13 rb2 12 rb1 11 rb0 10 vdd 2 vss 4 rtcc 1 n/c 3 n/c 5 rc4 22 mclr/vpp 28 ra0 6 ra1 7 ra2 8 ra3 9 rc5 23 rc6 24 ckin 27 rc7 2...

  • 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

    Cambridge azur front panel pcb bom ap part no. Drawing no description qty designator comments control pcb assembly (front panel) ap12712/8b control pcb snap off (front panel) 1 220r 0.25w 1% metal film resistor 2 r1 820r 0.25w 1% metal film resistor 2 r3,r6,r7 r33 10k 0.25w 1% metal film resistor 6 ...

  • Page 17

    Cambridge azur 640a integrated amplifier ap12707/6 power amp schematic (power supply) +15v -15v d17 1n5402 d18 1n5402 d20 1n5402 d19 1n5402 c32 47n poly c20 47n poly c25 2200uf c62 2200uf c26 2200uf c21 2200uf c23 2200uf c63 2200uf c30 2200uf c29 2200uf +45v -45v c31 100n r97 47r j1 red j2 yellow j3...

  • Page 18

    Cambridge azur 640a integrated amplifier ap12707/6 power amp schematic (protection) 570mv +-1% q20 mje340 to be mounted on heatsink r87 4k7 8th r88 11k 8th 5 6 7 u7:b lm393 pic temp c52 100n r86 1k 1k / (1k + 11k) with 570mv transistor voltage gives 92deg c cutout r92 1k 8th for 1ma r93 10k 8th r89 ...

  • Page 19

    Cambridge azur 640a integrated amplifier ap12707/6 power amp schematic (left channel) 1 2 cn2 h2 2.54mm signal in d4 in4004 d2 in4004 +45v -45v r44 4r7 3w ww r99 100r r21 100r q14 mje350 r27 150r r43 150r c66 220u 50v c65 220u 50v r28 150r r30 100r 8th r31 100r 8th r102 33k r103 150r c8 470p r34 1k ...

  • Page 20

    Cambridge azur 640a integrated amplifier ap12707/6 power amp schematic (right channel) 1 2 cn11 h2 2.54mm signal in d10 in4004 d8 in4004 +45v -45v r50 4r7 3w ww r70 100r r51 100r q31 mje350 r71 150r r98 150r c43 220u 50v c45 220u 50v r72 150r r81 100r 8th r80 100r 8th r65 33k r64 150r c51 470p r79 1...

  • 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

    Ap131336 ap part no. Drawing no description qty designator comments power amp pcb assembly 1 fixes in the correct position onto the plastic pcb standoffs and support bracket ap12708/6a bare power amp pcb 1 0.22r 3w wirewound resistor 4 r22, r52, r69, r100 must be raised off pcb due to heat 4r7 3w wi...

  • Page 24

    Ap part no. Drawing no description qty designator comments 4.7n ceramic 50/100v 5mm pitch capacitor 1 c27 15n poly 50/100v 5mm pitch capacitor 2 c12, c14 47n poly 50/100v 5mm pitch capacitor 10 c19, c20, c32, c40, c55, c56, c57, c58, c67, c68 100n ceramic 50/100v 5mm pitch capacitor 10 c3, c4, c24, ...

  • Page 25

    Ap part no. Drawing no description qty designator comments link wire 24swg 20mm long 19 lk2, lk3, lk4, lk6, lk8, lk9, lk10, lk11, lk12, lk13, lk14, lk15, lk16, lk17, lk18, lk19, lk20, lk22, lk26 ap103492 heatsink and pcb support bracket 4 fit to power amp pcb ap10417/3 shelf heatsink assembly 2 fit ...

  • Page 26

    Cambridge azur 640a integrated amplifier ap12707/6 speaker output schematics 8 7 c202:d spkr 4-way r224 2r2 3w ww w201 to ap13772/1 6 7 8 rl1:c 12v 8a relay speaker test j9 terminal j11 terminal j23 terminal 4 3 c202:b spkr 4-way j24 terminal lk24 link j26 terminal headphone j27 terminal headphone 5...

  • 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

    Cambridge azur speaker output pcb bom ap131336 ap part no. Drawing no description qty designator comments speaker terminal output pcb assembly 1 position on rear panel ap12708/6b bare speaker terminal pcb 2r2 3w wirewound resistor 2 r224, r264 1k 0.125w 1% metal film resistor 1 r33 10k 0.125w 1% met...

  • Page 30

    Cambridge azur 640a integrated amplifier ap12711/9 mains input schematic earth 3 4 5 rl1:b relay fu1 20mm f6.3al fu2 20mm f6.3al 6 7 8 rl1:c relay fu3 20mm t6.3/3.15al transformer j1 terminal j2 terminal j3 terminal j4 terminal j5 terminal j6 terminal j7 terminal j8 terminal j9 terminal j10 terminal...

  • 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

    Cambridge azur mains input pcb bom ap131336 ap part no. Drawing no description qty designator comments mains input pcb assembly 1 fixes in the correct position onto the plastic pcb standoffs ap12712/8a bare mains input pcb 1 x2 680n suppression 1 c2 1k 0.25w 1% metal film resistor 1 r25 10k 0.25w 1%...

  • 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

    Ap13133/6 ap part no. Drawing no description qty comments carton label (model no.) uk black 1 for box py593 cambridge selector knob mk3 3 py591 cambridge new range amp volume knob 1 py575 cambridge new range amp front panel (punched and printed) 1 screened with artwork ap13679/2 opus control box but...

  • Page 40

    Cambridge azur 640a amplifier ap12714/6 input select pcb schematic cd in l tuner in l dvd in l av in l cd in r tuner in r dvd in r av in r phon o/ aux in l phon o/ aux in r ta p e o u t2 r ta p e o u t1 r ta p e o u t2 l ta p e o u t1 l ta p e mo n l ta p e mo nr pre out r pre out l st dat clk 6 cn1...

  • Page 41

    Cambridge azur 640a amplifier ap12714/7 input select pcb schematic cd in l tuner in l dvd in l av in l cd in r tuner in r dvd in r av in r phon o/ aux in l phon o/ aux in r ta p e o u t2 r ta p e o u t1 r ta p e o u t2 l ta p e o u t1 l ta p e mo n l ta p e mo nr pre out r pre out l st dat clk 6 cn1...