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  5. Service Manual

Bang & Olufsen BeoSound 9000 MKIII Service Manual

Summary of BeoSound 9000 MKIII

  • Page 1

    Beosound 9000 mkiii type 2571, 2572, 2573, 2574, 2575, 2576, 2577, 2580 service manual english, german, french.

  • Page 2

    Survey of modules 1.1 1 fm/am - rds .......................................Diagram a, aa, b, bb page 2.11, 12, 13, 14 3 main microcomputer ...........................................Diagram j page 2.24 4 mains filter ......................................................... Diagram n page 2.29 5 mai...

  • Page 3

    Specification guidelines for service use beosound 9000 mkiii with fm and am range and rds type 2571 (eu), 2572 (gb), 2573 (usa-cdn), 2574 (j), 2575 (aus), 2576 (twn), 2577 (kor), 2580 (lat) operation direct keyboard beo4, beolink 1000 mechanical functions change from playing cd1 to playing cd6 (lid ...

  • Page 4

    Specifi cation guidelines for service use 1.3 connections master link pin 1 data-, -0.5 v ±0.2 v in relation to data+ pin 2 data+, +0.5 v ±0.2 v in relation to data- pin 3 ml connect > 3 v pin 4-6 +supply voltage, +7 v to +15 v (in stand-by +3 v to +15 v) pin 7-10 not used pin 11 -supply voltage, -7...

  • Page 5

    1.4 specifi cation guidelines for service use dimensions w x h x d 86.9 x 7 x 30.1 cm weight 11.5kg finish black, aluminium optional accessories beo4 type 1624, 1625 (i) wall bracket horizontal type 2054 wall bracket vertical type 2063 bracket type 2053 stand, adjustable in two heights type 2065 cab...

  • Page 6

    Brief operation guide 1.5 repeat this procedure for all the cds you have loaded… if you want to clear the posi- tions for a cd, move the car- riage to the cd in question… press to access the positioning then function to clear the position then press to clear the position naming cds press to play cd ...

  • Page 7

    1.6 brief operation guide playing your radio programs press to turn on the radio press to step through your or radio programs press to switch to stand-by presetting radio stations press to turn on the radio press to start the tuning function press to select [am] or [fm], switches from one to the oth...

  • Page 8

    Brief operation guide 1.7 repeat the procedure with the ▲ and ▼ buttons and ok to program the exact timer for stopping a timer to program a [single date] timer... Press to display the date you or want to program a timer for then press to accept the selection then press to store your timer programmin...

  • Page 9

    1.8 brief operation guide the pin-code system activate the pin-code system while the beosound 9000 is in stand-by mode you can set up the pin-code. Change or delete your pin-code while the pin-code function is turned on you can always make changes to the pin-code. Press p twice followed by pause to ...

  • Page 10

    Explanation of diagram 2.1 explanation of diagram type numbers of transistors and ics are indicated on the diagrams. If the position is followed by an asterisk the spare part number must always be used because the component in question has been specially selected, e.G. Ic4*. Component print and coor...

  • Page 11

    2.2 explanation of diagram measuring conditions all dc voltages have been measured in relation to ground with a voltmeter with an input impedance of 10 mohms. The dc voltages are stated in volts (v), e.G. 0.7v. All oscillograms and ac voltages have been measured in relation to ground with an oscillo...

  • Page 12

    2.3 wiring diagram wiring diagram 2.3 2.3 wiring diagram.

  • Page 13

    2.4 block diagram block diagram 2.4 2.4 overall block diagram pcb01 pcb41 pcb03 pcb34 34ic7 34ic10 34ic12 pcb22 a,aa b,bb j.

  • Page 14

    2.5 block diagram block diagram 2.5 2.5 block diagram for am block diagram for frontend tuner.

  • Page 15

    2.6 block diagram block diagram 2.6 2.6 block diagram for cd.

  • Page 16

    2.7 block diagram block diagram 2.7 2.7 block diagram for input/output select.

  • Page 17

    2.8 block diagram block diagram 2.8 2.8 block diagram for data.

  • Page 18

    2.9 block diagram block diagram 2.9 2.9 block diagram for motor control 22 22pe1 41 22pe2 22pe3 22ic1 22ic1 22ic1 22ic2 22ic2 22ic2 41ic16 41tr2/3/pe1/ disc ic6 detector 41ic1.

  • Page 19

    2.10 block diagram block diagram 2.10 2.10 block diagram for power supply.

  • Page 20

    2.11 diagram a diagram a 2.11 2.11 diagram a – frontend tuner pcb drawing for pcb1 see page 2.15.

  • Page 21

    2.12 diagram aa diagram aa 2.12 2.12 diagram aa – fm/am detector pcb drawing for pcb1 see page 2.15.

  • Page 22

    2.13 diagram b diagram b 2.13 2.13 diagram b – stereo decoder and power section pcb drawing for pcb1 see page 2.15.

  • Page 23

    2.14 diagram bb diagram bb 2.14 2.14 diagram bb – rds and µp pcb drawing for pcb1 see page 2.15.

  • Page 24

    2.15 pcb drawing pcb drawing 2.15 2.15 pcb1, fm/am - rds – primary side pcb1, fm/am - rds – secondary side.

  • Page 25

    2.16 diagram c diagram c 2.16 2.16 diagram c – cd servo decoder pcb drawing for pcb41 see page 2.17.

  • Page 26

    2.17 diagram d diagram d 2.17 2.17 diagram d – turn table and motor control pcb41, cd – primary side pcb41, cd – secondary side.

  • Page 27

    2.18 diagram e diagram e 2.18 2.18 diagram e – master link interface data/audio pcb drawing for pcb32 see page 2.21.

  • Page 28

    2.19 diagram f diagram f 2.19 2.19 diagram f – digital/analog decoder pcb drawing for pcb32 see page 2.21.

  • Page 29

    2.20 diagram g diagram g 2.20 2.20 diagram g – input select and sound adjustment pcb drawing for pcb21 and pcb32 see page 2.21.

  • Page 30

    2.21 pcb drawing pcb drawing 2.21 2.21 pcb32, input/output select, sound adjustment – preliminary side pcb21, headphone pcb32, input/output select, sound adjustment – secondary side.

  • Page 31

    2.22 diagram h diagram h 2.22 2.22 diagram h – keyboard and ir receiver pcb13, secondary keyboard pcb drawing for pcb14 see page 2.30

  • Page 32

    2.23 diagram i diagram i 2.23 2.23 diagram i – display and clamper position pcb drawing for pcb7 see page 2.31 pcb22, clamper position.

  • Page 33

    2.24 diagram j diagram j 2.24 2.24 diagram j – microcomputer, power supply & light indicator pcb drawing for pcb24 see page 2.30 – pcb34 see page 2.25.

  • Page 34

    2.25 pcb drawing pcb drawing 2.25 2.25 pcb34, power supply.

  • Page 35

    2.26 diagram l diagram l 2.26 2.26 diagram l – motor control.

  • Page 36

    2.27 pcb drawing pcb drawing 2.27 2.27 pcb35, motor control.

  • Page 37

    2.28 diagram m diagram m 2.28 2.28 diagram m – motor control and detection pcb drawing for pcb35 see page 2.27 pcb9, sledge position pcb26, end stop detector pcb28, safety rx pcb37, lid motor.

  • Page 38

    2.29 diagram n diagram n 2.29 2.29 diagram n – power supply pcb drawing for pcb4 see page 2.31 – pcb5 see page 2.30 – pcb34 see page 2.25.

  • Page 39

    2.30 pcb drawings pcb drawings 2.30 2.30 pcb24, light indication, left pcb14, ir receiver pcb5, mains relay diagram o – mains relay usa.

  • Page 40

    2.31 pcb drawings pcb drawings 2.31 2.31 pcb4, mains filter pcb7, display.

  • Page 41

    3.1 list of electrical parts list of electrical parts 3.1 3.1 list of electrical parts resistors not referred to are standard, see page 3.13 and 3.14 pcb1, 8000462 fm/am - rds type 2571, 2572, 2573, 2575, 2576, 2577, 2580 ic200 ∆ 8344023 147 tda7421n ic201 ∆ 8343950 151 ts912id ic203 ∆ 8342519 151 m...

  • Page 42

    Pcb1, 8000535 fm/am - rds type 2574 list of electrical parts 3.2 c202 4000401 12pf 50v c203 4001125 15pf 50v c213 4001120 5.6pf 50v c221 4001126 18pf c222- 4001119 4.7pf 50v c223 c274 4001127 22pf 50v c275 4001131 47pf 50v c297 4000401 12pf 50v l201 8021385 coil 108nh l202- 8021384 coil 108nh l203 l...

  • Page 43

    C17- 4001143 470pf 5% 50v c18 c20- 4001135 100pf 5% 50v c21 c22 4010274 100nf -20+80% 25v resistors not referred to are standard, see page 3.13 and 3.14 c23 4001135 100pf 5% 50v c50 4010274 100nf -20+80% 25v c51- 4010323 1µf -20+80% 16v c52 il1 8230125 bulb, 190ma 6.3v p62 7211134 socket 6 pole p63 ...

  • Page 44

    List of electrical parts 3.4 c12- 4001143 470pf 5% 50v c13 c14 4001131 47pf 5% 50v c15 4011134 100nf 10% 16v c20 4011124 15nf 10% 50v c21 4011110 1nf 10% 50v l1 8020744 coil 455khz bp1 8030392 cer. Fi lter 455khz p49 7211053 socket 4 pole pcb20, 8001824 ml interface ic1 ∆ - 8341022 151 4558 ic7 ∆ ic...

  • Page 45

    Resistors not referred to are standard, see page 3.13 and 3.14 3.5 list of electrical parts pcb24, 8005304 light indication, left tr1- 8320755 51 bc847b tr6 d4- 8330387 230 led red d6 p73 6276998 plug 8 pole p74 6276913 plug 4 pole pcb25, 8005305 light indication, right d1- 8330387 230 led red d3 pc...

  • Page 46

    List of electrical parts 3.6 tr27- 8320755 51 bc847b tr28 tr29 8320811 51 bc857b tr400- 8321171 75 fzt790a tr401 tr402- 8320755 51 bc847b tr404 tr405 8320811 51 bc857b tr500 8321159 51 fmmt489 tr600 8321198 136 pumx1 tr601- 8321197 136 pumt1 tr602 tr603 8321202 51 pdtc114eu d2- 8300644 250 z6.2v 2% ...

  • Page 47

    Resistors not referred to are standard, see page 3.13 and 3.14 l1- 8020705 coil 100µh 10% l4 3.7 list of electrical parts l5- 8020821 coil 2.2µh 5% l6 t400 8021159 transformer 796khz p1 7210418 socket 7 pole p2- 7210689 socket 8 pole p3 p4 7210904 socket 16 pole p20 7211221 socket 4 pole p21 7211223...

  • Page 48

    List of electrical parts 3.8 d30 8301218 256 bat254 d31 8301217 250 stps3l60s d33 8301059 256 z3.3v 2% 0.4w d34 8301104 250 sm6t15c d40- 8301045 250 bas216 d46 d47 8301061 256 z3.9v 2% 0.4w r4 5030054 4 x 100k Ω 5% 1/16w r5 5021508 47k Ω 1% 1/4w r7 5021508 47k Ω 1% 1/4w r17 5012382 10k Ω 0.1% 1/4w r...

  • Page 49

    Resistors not referred to are standard, see page 3.13 and 3.14 c114 4001131 47pf 5% 50v c115 4011122 10nf 10% 50v c116 4201348 1µf 10% 16v 3.9 list of electrical parts c120- 4000466 470pf 5% 100v c123 l1 8021113 coil 47µh 10% l2 8020772 coil 10µh 20% l3- 8020914 coil 470µh 15% l4 l5 8020916 coil 47µ...

  • Page 50

    List of electrical parts 3.10 d1- 8301045 250 bas216 d6 d8- 8301045 250 bas216 d9 d12- 8300915 250 gf1m d15 d16 8301059 256 z3.3v 2% 0.4w d17- 8301076 256 z15v 2% 0.4w d20 d21 8301081 256 z24v 2% 0.4w d22 8301045 250 bas216 d24 8301076 256 z15v 2% 0.4w d30- 8301045 250 bas216 d32 d35- 8301045 250 ba...

  • Page 51

    Resistors not referred to are standard, see page 3.13 and 3.14 l1 8020772 coil 10µh 20% l2- 8021079 coil 2.2µh 10% l5 x1 8090182 crystal 16mhz cp1 7530117 contact pin 3.11 list of electrical parts p50 7211229 socket 20 pole p51 7221133 plug 8/8 pole p52 7211053 socket 4 pole p53 7221159 plug 2 pole ...

  • Page 52

    List of electrical parts 3.12 r111- 5013242 2.7k Ω 1% 1/16w r112 r113 5013063 10k Ω 1% 1/16w r116 5013124 1.0k Ω 1% 1/16w c1 4201359 3.3µf 20% 16v c2 4011135 100nf -20+80% 16v c4 4011135 100nf -20+80% 16v c5 4201359 3.3µf 20% 16v c6 4011135 100nf -20+80% 16v c7 4010315 22nf 10% 25v c8 4011135 100nf ...

  • Page 53

    3.13 list of electrical parts mechanical part numbers 90m1 8400214 gear motor 90m2 8400213 sledge motor, complete w/wire 90t1 8013551 transformer 230v f/type 2571, 2572, 2577, 2580 8013549 transformer 120v f/type 2573, 2576 8013548 transformer 100v f/type 2574 8013550 transformer 240v f/type 2575 90...

  • Page 54

    List of electrical parts 3.14 resistors smd 5% 1/16w 1.25mm 0.55mm 2.0m m 0.8mm 0.45mm 1.6m m x1 x10 x100 x1k x10k x100k x1m x10m 0.0 6000072 1.0 5011920 5011932 5011944 5011956 5011968 5011980 5012275 1.2 5012326 5011921 5011933 5011945 5011957 5011969 5012267 1.5 5012379 5011922 5011934 5011946 50...

  • Page 55

    4.1 list of mechanical parts list of mechanical parts top 13module 8005313 pcb13, secondary keyboard 24module 8005304 pcb24, light indication, left 25module 8005305 pcb25, light indication, right 27module 8005377 pcb27, safety tx 28module 8005303 pcb28, safety rx 9001 3162785 glass lid 9002 3160059 ...

  • Page 56

    Top list of mechanical parts 4.2 4.2 list of mechanical parts 4.2 9001 2 13 25 24 barrierta 1 1 1 1 2 2 2 3 1 1 1 1 3 1 1 1 1 11 27 28 9024 9007 9008 9025 9013 9014 9026 9027 9006 9007 9008 9009 9010 9011 9012 9013 9014 9015 9016 4 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 6 6 6 6 6 6 ...

  • Page 57

    4.3 list of mechanical parts list of mechanical parts 4.3 4.3 chassis 9030 34mp1 35mp1 90p1 0102 90p3 90p2 90m2 9032 9033 9038 9034 9039 9035 9036 9037 9044 1401 1402 9040 9041 9042 9043 9048 9049 3501 9050 9040 9051 9046 9052 9047 9060 9063 9064 9065 90t1 9066 9067 9053 9068 9069 9070 90m1 9073 37 ...

  • Page 58

    List of mechanical parts 4.4 4.4 list of mechanical parts 4.4 chassis 01module 8000462 pcb1, fm/am-rds f/type 2571, 2572, 2573, 2575, 2576, 2577, 2580 8000535 pcb1, fm/am-rds f/type 2574 0102 2380170 nut f/fm socket if pcb88 are mounted instead of pcb01 see service manual beosound 9000 -3538887/3538...

  • Page 59

    4.5 list of mechanical parts list of mechanical parts 4.5 4.5 sledge barrierta barrierta barrierta barrierta barrierta barrierta barrierta barrierta barrierta barrierta barrierta 31 29 7 30 95 41 9101 9501 9103 9104 9105 9106 9108 91m1 9110 9111 9120 9122 9102 9123 9124 9125 9126 9127 9129 9130 9128...

  • Page 60

    List of mechanical parts 4.6 4.6 list of mechanical parts 4.6 sledge 07module 8005364 pcb7, display 7il1 8230125 bulb, 190ma 6.3v 29module 8005309 pcb29, lamp 29il1 8230125 bulb, 190ma 6.3v 30module 8001865 pcb30, ir transmitter, tacho clamper 31module 8001866 pcb31, ir receiver, tacho clamper 41mod...

  • Page 61

    4.7 list of mechanical parts list of mechanical parts 4.7 4.7 guide f/wire and ribbon cables 9150 9151 9152 9159 9154 9155 9157 9156 9158 22 31 31 31 52 52 41 41 41 41 41 41 1 23 51 1 1 1 1 13 1 23 51 53 guide f/wire and ribbon cables 22module 8000514 pcb22, clamper position 9150 2510178 holder 9151...

  • Page 62

    Accessories 8720047 am loop antenna 8720048 fm antenna guide 3505745 danish 3505746 swedish 3505747 finnish 3505748 english, eu 3505749 german 3505750 dutch 3505751 french 3505752 italian 3505753 spanish 3505754 portuguese 3505755 greek 3505756 brazil 3505757 polish 3505758 russian 3505759 hebrew 35...

  • Page 63

    Bracket 2053 9210 2569423 bracket 4 4 4 4 2 2 3 3 9210 1 2 3 4 5 survey of screws etc. 1 2930133 adjustment bushing 2 2042211 screw 4 x 12mm 3 2930132 bushing 4 3103326 foot, 1 piece 5 2569438 wall profi le parts not shown 3103372 foot, set incl. Screws 3040037 red adjustment key 3390455 bag w/parts...

  • Page 64

    Wall bracket horizontal 2054 9220 2569470 wall profi le 9221 3452692 rear plate c c b b b b a a 9220 9221 a b c 1 survey of screws etc. 1 3390533 bag w/parts parts not shown 3392518 packing, complete 3502942 setting-up guide cable cover 2062 2569440 profi le 3031545 bracket 3392517 packing, complete...

  • Page 65

    Wall bracket vertical 2063 9230 2569471 wall profi le 9231 3452693 rear plate b b b b a a a c c 9230 9231 a b c 1 4.11 list of mechanical parts survey of screws etc. 1 3390533 bag w/parts parts not shown 3392518 packing, complete 3502984 setting-up guide.

  • Page 66

    Stand 2065 9203 3162463 cover 3162823 cover – new colour from serial no. ___________________ 9206 3452701 back plate 9207 2569601 tube, high 118,6 cm 9208 3162731 cover plate, aluminium 9209 2752070 iron foot list of mechanical parts 4.12 4/5 4/5 4/5 4/5 2 2 2 9208 9203 9206 9207 3 3 3 3 9209 1 2 3 ...

  • Page 67

    Adjustments adjustment of sensitivity of fi nger protection system 1. Install the glass lid, and close the lid. (important!) 2. Switch off the product at the mains switch. 3. Connect an ohmmeter between ground and the middle pin on 35r365, and adjust to minimum value. 4. Connect an oscilloscope (dc)...

  • Page 68

    Mechanical adjustments adjustment of cd mechanism see brief operation guide, page 1.5. Adjustment of lid remove the left aluminium plate (see point 2 under dismantling for further information, if necessary) and open the lid covering the secondary keyboard. Adjust the lid until it is parallel with th...

  • Page 69

    Test modes because of the high complexity of beosound 9000 mkiii it is important to use the built-in test and service functions during and after servicing the product. A good approach to fi nding an error is test mode 27 in wich a report can be seen. Remember always to execute test modes 71 and 73 a...

  • Page 70

    Test mode activating (by beo4) wait 20 - 30 sec. After connecting to mains. Since beosound 9000 is in option 0 if power link speakers are not connected, the option has to be changed to 1. Option 1 can be obtained by short-circuiting pins 2 and 4 on the power link sockets. See brief operation guide f...

  • Page 71

    Tm07 tuner variant setup: if from eu or aus to us: key in the 3 digits indicating the choice. No. 0: 003 = variant us no. 1: 001 = rds on, or 000 = rds off no. 2: 175 = fm starts in 500 khz no. 3: 216 = fm stops in 500 khz no. 4: 075 = deemphas in µs no. 5: 000 = lw starts in khz dividing with am ra...

  • Page 72

    Tm23 read out of software version. Press go to continue. App xx.Xxx = application processor. (main cpu) os xx.Xxx = apos iop xx.Xxx = i/o processor mot xx.Xxx = motor processor. (mot-fep) tun xx.Xxx = tuner processor. (tuner-fep) cd xx.Xxx = cd processor. (cd-fep) tm24 service running counter. First...

  • Page 73

    Ml: last error regarding to ml. - 08: link tied down it is impossible to transmit on master link because it is pulled low. The error may occur if there is an error in the master link driver circuit, or because a short circuit has occurred on the master link. - 16: link tied up it is impossible to tr...

  • Page 74

    - 20: serial communication overrun error expected command byte, but received a data byte. - 22: serial communication noise error check sum did not match. - 23: serial communication software error queue full. - 37: selection error unknown command os: error in the operation system. - 08: il tlg from a...

  • Page 75

    Ap: application processor errors. - 16: illegal timer id - 17: timer not free - 21: illegal date value - 22: illegal time value - 23: illegal timer parameters - 32: illegal simple message id - 33: out of message buffers - 34: message buffer virtual limit reached - 64: non isr func. Called from isr -...

  • Page 76

    - 31: cc sledge pos opto error. Microprocessor 35ic2 cannot register pulses from 9pe1. - 32: cc sledge calib switch error. Microprocessor 35ic2 cannot register the signal ref. Pos from the end stop detector at pin 20. This error also occurs if the tacho system is not working. - 33: cc clamp pos erro...

  • Page 77

    - 34: cc ttm pos count error. A counter error has occurred in connection with an adjustment ( test mode 73). Check the signals quad 1 ttm and quad 2 ttm from pcb31 ir tacho clamper rx. - 35: cc ttm pos opto error. (occurs during test mode 73 only) it has not been possible to carry out a correct adju...

  • Page 78

    Tm36 power down off. When power down mode is not possible the display = “tm ok”. To use cd test modes it is necessary to select cd, in the tm the hf-signal will not be used tm61 focus on. The cd-pen will try to focus. This tm can only be turned off by using tm62. Tm62 focus off. The cd-pen will be t...

  • Page 79

    Protection circuit is cut out during the test). When the sledge is running it must run “properly”. - the lid opens. - autocalibration of cd positions. This tests calibration, disc detector, sledge motor, sledge tacho, clamper motor, clamper optocoupler, and jaws. The clamper is noise-optimized durin...

  • Page 80

    Theft protection the theft protection is a 4 digit pin-code of the user’s own choice, which must be entered if the product has been disconnected from the mains for 15-30 min. The theft protection is always deactivated from the factory, it is up to the user to activate it. If the theft protection is ...

  • Page 81

    Exchange of software eeprom on pcb3 when exchanging the eeprom on pcb3, the data from the micro-processor will be written into the eeprom when selecting any source e.G. Radio. It is possible to borrow an eeprom from another beosound 9000 to test if there is suspicion of a fault in the original eepro...

  • Page 82

    Deactivate the pin code system you can deactivate the pin code system at any time. All you need is to enter your pin code fi rst and then deactivate the system. Press menu l l stop (beo4) or press p p pause buttons (keyboard) to key in the four-digit pin code. Pin _ _ _ _ appears. Key in your person...

  • Page 83

    Replacement of components exchange of microprocessor module pcb3 when exchanging pcb3 remember to insert the eeprom from the defective module, because it contains valuable data (serial no., type no., pin-code etc.). The data is not transferred to the new module untill you have been in contact with t...

  • Page 84

    Repair tips voltage to sledge motor disconnect the voltage supply to the sledge motor while servicing (lift 35p53). Repair of autopositioning tm73 is used in connection with repair of autopositioning. The circuit can be measured each time the test is run. Use a storage oscilloscope, if necessary. On...

  • Page 85

    By using one of the fl at cables provided at the back of the service manual (type 252x - 3538847 or order no. 6277184) the display can be engaged by connecting 7p63 and 34p8. In connection with test modes the cd has reduced operation. If the clamper arm is not installed, no tacho pulses will come fr...

  • Page 86

    5.61 error tree error tree 5.61 5.61 reading guide the error tree shown below is intended as an aid in connection with servicing beosound 9000, because the product has a number of functions that are dependent on each other. The error tree is a guideline, and it is based on troubleshooting procedures...

  • Page 87

    5.62 error tree error tree 5.62 5.62 are there 5vpp impulses on 35cp1? Yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes no no no no no no no no no no no no no no no no no no no no check optocouplers on pcb30 & 31 and their signal path on pcb22. If this is ok, then pcb3...

  • Page 88

    Dismantling and assembly, english 6.1 dismantling and assembly reading guide beosound 9000 has a high level of integration of mechanics and electronics. To achieve optimum servicing it is therefore important to follow these dismantling instructions carefully when servicing the product. The dismantli...

  • Page 89

    6.2 dismantling and assembly, english pcb5 mains relay - carry out points 1 to 5. - remove 35p53, power supply for sledge motor. - remove the screw for the cover over pcb5. Take off the cover. Do not cut the tyrap. - remove the leads in 5p82 and 5p84, and loosen the lead between 5p83 and 34p16. Make...

  • Page 90

    Dismantling and assembly, english 6.3 pcb24 light indication right - carry out points 1 to 5. - the diodes can be removed through the “front”. - the pcb is riveted to the chassis top plate and cannot be removed any further. If the pcb is removed, it must be fi xed again with double-sided adhesive ta...

  • Page 91

    6.4 dismantling and assembly, english pcb34 microcomputer and power supply - carry out points 1 to 5. - remove 35p53, power supply for sledge motor. - remove the plastic screen over the fl ex cables from the sledge. - lift up pcb34 and pcb35 simultaneously - watch out for the fl ex cables. Lift up p...

  • Page 92

    Dismantling and assembly, english 6.5 2. Left aluminium plate (grooved profi le) - lift the front edge on the left-hand side, push the plate to the left (it fi ts tightly), and lift it off. Fig. 2 bang & olufsen 3. Release of sledge - the sledge can be released in four different ways: a) with the pr...

  • Page 93

    6.6 dismantling and assembly, english 5. Chassis top plate - carry out points 1 - 4. - switch off the product. - lift out the operating panel, and remove the nine screws marked a. - lift up and tilt backwards. Fig. 4 6. Cover for cd clamper - turn the cover until bang & olufsen is aligned with the h...

  • Page 94

    Dismantling and assembly, english 6.7 9. Cd mechanism - carry out points 1 and 3 as well as points 6 to 8. - remove two screws from the cover over the cd mechanism. - lift the cover on the left-hand side and push it towards the right. - remove the two screws (c) for the cover of the cd pcb. Remove t...

  • Page 95

    6.8 dismantling and assembly, english 11. Sledge and ribbon cables - carry out the points 1 to 8, and remove the screws for the top plate (c, d, e), see point 10. - remove the plastic strip over the well containing the ribbon cables and the wires by lifting up the strip. - instal the red holder on t...

  • Page 96

    Insulation test each set must be insulation tested after having been dismantled. Make the test when the set has been reassembled and is ready to be returned to the customer. Flashovers must not occur during the testing procedure! Make the insulation test as follows: short-circuit the two pins of the...