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Cambridge Audio Azur 840C Service Manual

Summary of Azur 840C

  • Page 1

    Gallery court hankey place london se1 4bb uk tel: +44 (0)20 7940 2200 fax: +44 (0)20 7940 2233 840c issue date: 07 th february 2007 service manual specifications: d/a converters dual analog devices total correlated jitter ad1955 24 bit dac’s crosstalk @1khz digital filter analog devices black fin cr...

  • Page 2

    840c service manual table of contents safety precautions & important notes 3 laser safety precautions 4 exploded diagram 5 exploded diagram parts list 6 functional block diagram 7 front panel circuit diagram 8 front panel pcb layout (top side) 9 front panel pcb layout (bottom side) 10 front panel pc...

  • 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

    Laser safety precautions caution: these labels may be attached to the unit on the rear and inside to inform that it contains a laser component. Use of controls or adjustments, or performance of procedures other than those specified within the service or instruction manual may result in hazardous rad...

  • Page 5

    Cambridge audio azur 840c cd player exploded diagram to enhance viewing, please print to a3 5.

  • Page 6

    Cambridge audio azur 840c cd player exploded diagram p arts list n oi t pi r cs e d e c n er ef e r yr ot c a f tr a p p a .F e r g ni w ar d 1 py1228 7003-008010e006 screw m3*8 m/c 1/k torx recess zn-pt (silver) 1 py1229 7003-008010e001 screw m3*8 m/c 1/k torx recess blk-pt (black) 2 py1218 6574-01...

  • Page 7

    Cambridge audio azur 840c cd player functional block diagram dsp dc servo circuit current source circuit it ov it ov differen tial filter/amp differential t o single ended unbalanced o /p balan c e d o /p dac w d clk bitcl k sdat a l re se t mut e d a c control i/f d a c1 m clk 24.576 mhz clock + bu...

  • Page 8

    Cambridge audio azur 840c cd player ap19135/4 f ront p anel circuit diagram co n t r o l b u s spi dat a r x spi int spi d at a t x spi c lk spi c s serial t x serial r x oe1 so1_u 7 so2_u 7 so1_u 9 mute c1 1n 50v x 7r c2 1n 50v x 7r 1 2 3 4 5 6 7 cn1 co n n -h7 k1 k2 po wer d e t e ct reset gnd +5 ...

  • Page 9

    Cambridge audio azur 840c cd player ap19135/3 f ront p anel board layout (t op side) to enhance viewing, please print to a3 9.

  • Page 10

    Cambridge audio azur 840c cd player ap19135/3 f ront p anel board layout (bottom side) to enhance viewing, please print to a3 10

  • Page 11

    Ap19138/5 ap part no. Value description factory part no qty component ident notes 47r 0.25 w 1% metal fil m 1 r1 56r 0.25 w 1% metal fil m 2 r3, r4 100r 0.25 w 1% metal fil m 16 r5, r7, r8, r20-r3 2 220r 0.25 w 1% metal fil m 1012-201014e000 4 r2, r9, r36, r3 7 300r 0.25 w 1% metal fil m 1 r10 680r ...

  • Page 12

    Cambridge audio azur 840c cd player ap18432/3 cd servo pcb schematic (d a c ) sd a t a 1 dem/ s cl 2 lr c k 3 mc l k 4 ao u t l 8 va + 7 a gnd 6 ao u t r 5 u5 c s 4333/ 3 8 c4 1 0.1u f c4 0 10u f 25v c3 9 10u f 25v c3 2 10u f 2 5v r75 15k r82 15k r80 12k r74 12k c4 2 390p f c3 8 390p f 3 2 1 8 4 u4:...

  • Page 13

    Cambridge audio azur 840c cd player ap18432/3 cd servo pcb schematic (servo) seg 14 77 seg 15 76 seg 16 75 seg 17 74 seg 18 73 nc 72 nc 71 nc 70 nc 69 nc 68 nc 67 nc 66 nc 65 nc 64 nc 63 nc 62 nc 61 nc 60 nc 59 nc 58 nc 57 nc 56 nc 55 nc 54 nc 53 fl/t l 52 vdd 51 seg 13 78 seg 12 79 seg 11 80 se g 1...

  • Page 14

    Cambridge audio azur 840c cd player ap12927/8 c d servo board layout (t op side) to enhance viewing, please print to a3 14.

  • Page 15

    Cambridge audio azur 840c cd player ap12927/8 c d servo board layout (bottom side) to enhance viewing, please print to a3 15.

  • Page 16

    Ap19969/3 ap part no value description qty component ident factory part no notes 0 0 0 - 4 1 0 0 0 0 - 1 1 0 1 0 4 r 1 r o t s i s e r m l i f l a t e m w 5 2 . 0 r 0 1 15r 0.125 w metal film resistor 1 r62 k n il e s u . Y l n o c 0 4 8 r o f 7 6 r 1 k n il m m 4 1 k n il 0 0 0 - 8 1 0 0 0 7 - 4 1 ...

  • Page 17

    Ap19969/3 ap part no value description qty component ident factory part no notes cambridge audio azur 840c servo pcb assembly bom py565 toshcdmcu mcu tmp87ep26f-1j15 sop toshiba 0 0 0 - 3 0 1 0 6 2 - 7 8 1 4 3 u 1 0 0 0 - 3 5 0 0 2 9 - 0 2 1 4 6 u 1 c i r e v i r d r e w o p a b i h s o t n 2 9 0 2 ...

  • Page 18

    Cambridge audio azur 840c cd player ap17977/2 v oltage select switch pcb schematic j2 fr o m j4 (c ommon ) sw1 voltselect rf1002b 115/230v marking j1 brown (230v) j3 black (115v) to enhance viewing, please print to a3 18.

  • Page 19

    Cambridge audio azur 840c cd player ap17977/2 v oltage select switch board layout (t op side) to enhance viewing, please print to a3 19.

  • Page 20

    Cambridge audio azur 840c cd player ap17977/2 v oltage select switch board layout (bottom side) to enhance viewing, please print to a3 20

  • Page 21

    Ap17980/1 ap part no value description qty component ident factory part number notes 0 0 0 - 0 0 2 0 1 0 - 6 0 4 2 1 w s 1 r o t c e l e s e g a t l o v b 2 0 0 1 f r cambridge audio azur 840c v2 voltage selector pcb assembly bom connectors note: resistors, capacitors and other 'generic' electronic ...

  • Page 22

    Cambridge audio azur 840c cd player ap19129/4 d a c dsp circuit diagram (abus) ir out ir in ir in cn100 jack-ckx-3.5-12 3.5mm jack +5v 3 opt 1 gnd 2 u1 tsop1836 ir receiver +5v 1 2 3 u3:a 4011 vd d = +5v vss=gnd 1 2 6 5 4 nc 3 u2 op4n25 5 6 4 u3:b 4011 vd d =+5v vss=gnd 8 9 10 u3:c 4011 vd d = +5v v...

  • Page 23

    Cambridge audio azur 840c cd player ap19129/5 d a c t est signals (main signal p aths general) test point schematic ref page signal type measurement node t n e m er us a e m n oit pi rc s e d meter type e p oc s‘ la n gi s at a d lai r es s u o u nit n o c v 5 p/i 1 la cit p o fi d p s 3 ni p 7 u la...

  • Page 24

    Cambridge audio azur 840c cd player ap19129/4 d a c dsp circuit diagram (dsp) bitclk wd clk sd ata_l sd ata_r cs_d ac1 cs_d ac2 re l a y ss d s p r eset reset d a c1_mclk d a c2_mclk mosi sck ss_1 sck_1 ds p_miso_1 ds p_mosi_1 d7 d6 d5 d4 d3 d2 d1 d0 a18 a17 a16 a15 a14 a13 a12 a11 a10 a9 a8 a7 a6 a...

  • Page 25

    Cambridge audio azur 840c cd player ap19129/5 d a c t est signals (main signal p aths general) test point schematic ref page signal type measurement node t n e m er us a e m n oit pi rc s e d meter type e p oc s‘ ev a w er a u qs z h m 6 7 5. 4 2 3 v 3 kc ol c r et sa m x r fi d p s 5 2 ni p 1 1 u l...

  • Page 26

    Cambridge audio azur 840c cd player ap19129/5 d a c dsp filters circuit diagram mut e reset mut e reset da c 1 _ m c lk sck cs_d a c1 mo si d a c2_ m clk sck cs_d ac2 mo si wdc lk bit c lk sd at a_r sd at a_l bit c lk wdc lk dvdd 1 lrc lk 2 bclk 3 sdat a/ef_ ld at a 4 ef_ rd at a 5 dsd_s cl k 6 dsd_...

  • Page 27

    Cambridge audio azur 840c cd player ap19129/5 d a c t est signals (main signal p aths left channel) test point schematic ref e py t r et e m t n e m er us a e m n oit pi rc s e d e d o n t n e m er us a e m e py t la n gi s e ga p e p oc s‘ ev a w er a u qs z h m 6 7 5. 4 2 3 v 3 kc ol c r et sa m 1...

  • Page 28

    Cambridge audio azur 840c cd player ap19129/5 d a c t est signals (main signal p aths left channel) test point schematic ref e py t r et e m t n e m er us a e m n oit pi rc s e d e d o n t n e m er us a e m e py t la n gi s e ga p approx -0.45v dc voltmeter 1khz sine wave 2v p-p ‘scope 0.02% thd+n (...

  • Page 29

    Cambridge audio azur 840c cd player ap19129/5 d a c t est signals (main signal p aths right channel) test point schematic ref page signal type measurement node e py t r et e m t n e m er us a e m n oit pi rc s e d e p oc s‘ ev a w er a u qs z h m 6 7 5. 4 2 3 v 3 kc ol c r et sa m 2 c a d o t 7 2 ni...

  • Page 30

    Cambridge audio azur 840c cd player ap19129/5 d a c t est signals (main signal p aths right channel) test point schematic ref page signal type measurement node e py t r et e m t n e m er us a e m n oit pi rc s e d approx -0.45v dc voltmeter’scope 1khz sine wave 2v p-p scope 0.02% thd+n (22k bw) thd ...

  • Page 31

    Cambridge audio azur 840c cd player ap19129/5 d a c dsp flash circuit diagram a12 a10 a9 a14 a15 a18 we_flash# a17 a16 a13 a8 a7 a6 a5 a4 a3 a2 a1 d0 d1 d2 d3 d4 d5 d6 d7 cs_flash# a11 oe_flash# +5v oe 1 so 1_u7 so 2_u9 so 1_u9 mute_pic 1 2 3 4 5 6 7 8 cn8 2mm 8w st head er serial_rx serial_tx ir ou...

  • Page 32

    Cambridge audio azur 840c cd player ap19129/5 d a c dsp supply circuit diagram d7 1n4002 d8 1n4002 d9 1n4002 d10 1n4002 +21v unreg -21v u nreg c59 100n100v c60 100n100v c61 33n250v r ectifier change t o schottky d3 1n4002 d4 1n4002 d5 1n4002 d6 1n4002 +10v u nreg c44 100n100v r ectifier change t o s...

  • Page 33

    Cambridge audio azur 840c cd player ap19129/4 d a c dsp board layout (t op side) to enhance viewing, please print to a3 33.

  • Page 34

    Cambridge audio azur 840c cd player ap19129/4 d a c dsp board layout (bottom side) to enhance viewing, please print to a3 34.

  • Page 35

    Ap19132/6 s e t o n t n e d i t n e n o p m o c y t q o n t r a p y r o t c a f n o i t p i r c s e d e u l a v o n t r a p p a 0 1 r , 1 r 2 w 3 6 0 . 0 r o t s i s e r r 0 2 2 a 0 1 t n e r r u c e g r u s a 2 t n e r r u c d e t a r 7 8 1 r , 6 8 1 r , 9 8 r , 2 r 4 w 5 2 1 . 0 r o t s i s e r r ...

  • Page 36

    Ap19132/6 s e t o n t n e d i t n e n o p m o c y t q o n t r a p y r o t c a f n o i t p i r c s e d e u l a v o n t r a p p a cambridge audio azur 840c dac pcb assembly bom 6 6 c i m a r e c r 7 x v 0 5 n 0 0 1 c2, c4, c7, c9, c12, c14, c21, c19, c20, c23, c24, c27, c28, c29, c32, c33, c43, c45, c...

  • Page 37

    Ap19132/6 s e t o n t n e d i t n e n o p m o c y t q o n t r a p y r o t c a f n o i t p i r c s e d e u l a v o n t r a p p a cambridge audio azur 840c dac pcb assembly bom 2 n c 1 e l g n a t h g i r b c p e p y t d y a w 9 d e t a l p d l o g , t r e s n i k c a l b 5 n c - 3 n c 3 s e 8 - 4 . 8...

  • Page 38

    Cambridge audio azur 840c cd player ap19125/3 mains pcb schematic fu3 20mm t2al j1 bl u e j3 to v o ltage selector p cb c3 x 2 47n suppr essio n c2 1n x1/y1 c &c c1 1n x1/y1 c&c j4 switch 1 j5 switch 2 to o n /off switch 1 p1 pad emc m3 l1 10u 5 a t68-2a mains l2 10u 5a t68-2a mains l n e cn3 iec pc...

  • Page 39

    Cambridge audio azur 840c cd player ap19125/3 mains pcb board layout (t op side) to enhance viewing, please print to a3 39.

  • Page 40

    Cambridge audio azur 840c cd player ap19125/3 mains pcb board layout (bottom side) to enhance viewing, please print to a3 40

  • Page 41

    Ap19128/2 ap part no value description qty component ident factory part no. Notes 1n x1/y1 10mm pitch polyester capacitor 2 c1, c2 h c t i p m m 5 1 3 c 1 r o t i c a p a c r e t s e y l o p h c t i p m m 5 1 2 x n 7 4 iec-socket 3 way iec connector 1 cn3 2336-003910-002 b10b-xh-a jst 10 way 2.54mm ...

  • Page 42: Details

    Cambridge audio azur 840c cd player ic pin layout details ta2153fn servo pcb (u1) tc9462fg servo pcb (u2) 42.

  • Page 43

    Mcu tmp87ep26f-1j15 servo pcb (u3) ta2092n servo pcb (u6) 7808 servo pcb (u7) 7805 servo pcb (u8) dac pcb (u17, u25, u27, u29, u31 & u36) c8050d servo pcb (q7, q8, q11 & q12) 43.

  • Page 44

    9014c servo pcb (q13) c8550 servo pcb (q9 & q10) 9015c servo pcb (q1) tsop1836ss3v front panel pcb (u1) pic16f877a-i/p front panel pcb (u2) ds18030-050 front panel pcb (u3) 44.

  • Page 45

    Pic12c508a-i/p front panel pcb (u4) ba6218 front panel pcb (u5) bc337 front panel pcb (q1, q2, q3 & q4) tsop1836 dac pcb (u1) op4n25 dac pcb (u2) 4011 dac pcb (u3) rx179at dac pcb (u4 & u5) 45.

  • Page 46

    74vhc14 dac pcb (u6 & u15) 74vhc153 dac pcb (u7) 74hct153 dac pcb (u9) 74vhc32 dac pcb (u8) tx179at dac pcb (u10) cs8416cz dac pcb (u11) 46.

  • Page 47

    Cs8406cz dac pcb (u12) adsp-bf532bstz400 dac pcb (u13) 7815 dac pcb (u14, u22, u49 & u51) 47.

  • Page 48

    7915 dac pcb (u16 & u24) lm1117t_3.3 dac pcb (u18 & u26) 74vhc125 dac pcb (u19) 74hct125 dac pcb (u20) ds1818 dac pcb (u21) 48.

  • Page 49

    74hcu04 dac pcb (u23) max202cse dac pcb (u28) lt1963aet dac pcb (u30) at49bv002an70tu dac pcb (u32) opa8421d dac pcb (u33, u34, u37 & u38) 49.

  • Page 50

    Opa1632dgn dac pcb (u35 & u39) opa2134ua dac pcb (u40, u41, u46, u50, u52 & u53) lt1761es5-byp dac pcb (u42 & u44) lt1761es5-2.8 dac pcb (u43 & u45) 7905 dac pcb (u47 & u48) ad1955ars dac pcb (u130 & u131) bc807-25 dac pcb (q2, q3, q5, q7, q8 & q9) 50

  • Page 51

    Mpsa14 dac pcb (q4 & q6) tip31 dac pcb (q10 & q11) bc817-25 dac pcb (q1, q12, q13, q17 & q18) 51.

  • Page 52: Circuit Description

    Circuit description to follow. 52.

  • Page 53

    Ap21487/1 azur 840c cd player upgrade software instructions cambridge audio gallery court hankey place london se1 4bb england www.Cambridge-audio.Com introduction the following instructions are a step-by-step guide on how to upgrade the dsp (digital signal processor) chip (type is analog devices ads...

  • Page 54

    1 x latest 840c dsp software (ap20059x 740c-840c dsp software upload file vx.X (6.1.Zz).Bin). 1 x latest 840c pic software (ap20058x 840c vx.X.Hex). Note: all the required software can be found on the service extranet. Please download and save all software onto your pc or laptop hard drive. Checking...

  • Page 55

    4. Switch the 840c on using the power on/off switch on the rear panel, while pressing and holding the standby/on button on the front panel. This will then display “download!” on the front panel lcd. This means the 840c is ready to receive new software. 5. Load the 840c loader software on your pc or ...

  • Page 56

    8. If the wrong comm port is selected, please close down the software and repeat the process, from step 6, above. 9. Select the “load file” button corresponding to “pic software download.” 10. This will then bring up a browse menu. Please locate the latest pic software (the file extension is .Hex) f...

  • Page 57

    12. Now press the “download code” button corresponding to “pic software download” to start the process. “programming pic processor…” will now display on the pc screen and the progress bar will start to move. Also “loading pic…” will be displayed on the 840c front panel lcd. 57.

  • Page 58

    13. When the process is complete, the program will display the following: also, the 840c will return to its standby mode. 14. If at any time during the process, there is a failure, an error message will be displayed. If this occurs, please repeat the steps above. If the problem persists, please seek...

  • Page 59

    1. Make sure the 840c is switched off. 2. Repeat steps 1 to 9 for the pic software above. Note: please skip step 1 if you already have the pc/laptop installer program installed. Also make sure you press and hold the standby/on button while switching on the 840c via the on/off switch on the rear pane...

  • Page 60

    Screen and the progress bar will start to move. Also “loading dsp…” will be displayed on the 840c front panel lcd. 7. When the process is complete, the program will display the following: also, the 840c will return to its standby mode. 8. If at any time during the process, there is a failure, an err...

  • Page 61

    Testing 1. Repeat the procedure “checking software version” above and note the new software version. This should be the same number as the numbers located on the file names of the hex and bin files. In this example the hex version is 1.1 (see item 10 pic picture above) and bin build version is 065 (...