Bang & Olufsen BeoSound 9000 MKIII Service Manual
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Bang & Olufsen BeoSound 9000 MKIII Service Manual

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BeoSound 9000 MKIII
Type 2571, 2572, 2573, 2574, 2575, 2576, 2577, 2580
Service Manual
English, German, French

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Summary of Contents for Bang & Olufsen 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 FM/AM - RDS ........diagram A, AA, B, BB 26 End Stop Detector ..........diagram M page 2.11, 12, 13, 14 page 2.28 3 Main Microcomputer ...........diagram J 27 Safety TX .............diagram M page 2.24 page 2.28 4 Mains Filter ............diagram N 28 Safety RX .............diagram M page 2.29 page 2.28...
  • Page 3 Specifi cation guidelines for service use 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...
  • Page 4 Specifi cation guidelines for service use 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...
  • Page 5 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...
  • Page 6 Brief operation guide BRIEF OPERATION GUIDE Programming a series of tracks Repeat this procedure for all the CDs you have loaded… For more detailed operation see for one CD User’s guide. Press to play CD If you want to clear the posi- tions for a CD, move the car- Closeup operation: riage to the CD in question…...
  • Page 7 Brief operation guide Playing your radio programs Mono/stereo reception Playing auxiliary sources Press to turn on the radio Press to turn on the relevant Press to select extra radio program equipment Press to choose [MONO] or Press to step through your Adjusting sound then [STEREO]...
  • Page 8 Brief operation guide Repeat the procedure with Automatic demonstration buttons and OK Press to show the clock to program the exact timer The product can be brought into for stopping a Timer automatic demonstration mode in which Press to see the date and it plays back 90 randomly chosen tracks.
  • Page 9 Brief operation guide The PIN-code system Activate the PIN-code system Change or delete your PIN-code Using your PIN-code When a PIN-code has been programmed, and While the BeoSound 9000 is in stand-by While the PIN-code function is turned on you the BeoSound 9000 has been disconnected mode you can set up the PIN-code.
  • Page 10 Explanation of diagram 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 coordinate system The largest PCBs have component prints and a coordinate system on both the primary and the secondary side.
  • Page 11 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 oscilloscope or a voltmeter with an input resistance of 1Mohm.
  • Page 12 Wiring diagram Wiring diagram Wiring diagram...
  • Page 13 Block diagram Block diagram Overall block diagram PCB01 A,AA B,BB PCB41 34IC7 PCB03 34IC10 34IC12 PCB34 PCB22...
  • Page 14 Block diagram Block diagram Block diagram for AM Block diagram for Frontend Tuner...
  • Page 15 Block diagram Block diagram Block diagram for CD...
  • Page 16 Block diagram Block diagram Block diagram for Input/Output Select...
  • Page 17 Block diagram Block diagram Block diagram for Data...
  • Page 18 Block diagram Block diagram Block diagram for Motor Control 41IC16 22IC1 22PE1 41TR2/3/PE1/ 22IC1 DISC IC6 DETECTOR 22PE2 41IC1 22IC1 22PE3 22IC2 22IC2 22IC2...
  • Page 19 2.10 Block diagram 2.10 2.10 Block diagram Block diagram for Power Supply...
  • Page 20 Diagram A 2.11 2.11 Diagram A 2.11 DIAGRAM A – Frontend tuner PCB drawing for PCB1 see page 2.15...
  • Page 21 2.12 Diagram AA 2.12 2.12 Diagram AA DIAGRAM AA – FM/AM detector PCB drawing for PCB1 see page 2.15...
  • Page 22 Diagram B 2.13 2.13 Diagram B 2.13 DIAGRAM B – Stereo decoder and power section PCB drawing for PCB1 see page 2.15...
  • Page 23 2.14 Diagram BB 2.14 2.14 Diagram BB DIAGRAM BB – RDS and µP PCB drawing for PCB1 see page 2.15...
  • Page 24 PCB drawing 2.15 2.15 PCB drawing 2.15 PCB1, FM/AM - RDS – primary side PCB1, FM/AM - RDS – secondary side...
  • Page 25 2.16 Diagram C 2.16 2.16 Diagram C DIAGRAM C – CD servo decoder PCB drawing for PCB41 see page 2.17...
  • Page 26 Diagram D 2.17 2.17 Diagram D 2.17 DIAGRAM D – Turn table and motor control PCB41, CD – primary side PCB41, CD – secondary side...
  • Page 27 2.18 Diagram E 2.18 2.18 Diagram E DIAGRAM E – Master Link interface data/audio PCB drawing for PCB32 see page 2.21...
  • Page 28 Diagram F 2.19 2.19 Diagram F 2.19 DIAGRAM F – Digital/analog decoder PCB drawing for PCB32 see page 2.21...
  • Page 29 2.20 Diagram G 2.20 2.20 Diagram G DIAGRAM G – Input select and Sound adjustment PCB drawing for PCB21 and PCB32 see page 2.21...
  • Page 30 PCB drawing 2.21 2.21 PCB drawing 2.21 PCB21, Headphone PCB32, Input/output Select, Sound Adjustment – preliminary side PCB32, Input/output Select, Sound Adjustment – secondary side...
  • Page 31 2.22 Diagram H 2.22 2.22 Diagram H DIAGRAM H – Keyboard and IR Receiver PCB13, Secondary Keyboard PCB drawing for PCB14 see page 2.30...
  • Page 32 Diagram I 2.23 2.23 Diagram I 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 2.24 2.24 Diagram J DIAGRAM J – Microcomputer, Power supply & Light Indicator PCB drawing for PCB24 see page 2.30 – PCB34 see page 2.25...
  • Page 34 PCB drawing 2.25 2.25 PCB drawing 2.25 PCB34, Power Supply...
  • Page 35 2.26 Diagram L 2.26 2.26 Diagram L DIAGRAM L – Motor Control...
  • Page 36 PCB drawing 2.27 2.27 PCB drawing 2.27 PCB35, Motor Control...
  • Page 37 2.28 Diagram M 2.28 2.28 Diagram M PCB9, Sledge Position DIAGRAM M – Motor Control and Detection PCB drawing for PCB35 see page 2.27 PCB26, End Stop Detector PCB28, Safety RX PCB37, Lid Motor...
  • Page 38 Diagram N 2.29 2.29 Diagram N 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 2.30 2.30 PCB drawings DIAGRAM O – Mains relay USA PCB5, Mains Relay PCB14, IR Receiver PCB24, Light indication, left...
  • Page 40 PCB drawings 2.31 2.31 PCB drawings 2.31 PCB4, Mains Filter PCB7, Display...
  • Page 41 List of electrical parts List of electrical parts List of electrical parts C247 4011130 47nF 16V C298 4010420 10µF 10V C248- 4010420 10µF 10V C300 4010419 4.7µF 10V C250 C301 4011128 33nF 25V C251 4010316 100nF 25V C302 4011120 6.8nF 50V C252- 4011134 100nF 16V C303...
  • Page 42 List of electrical parts PCB1, 8000535 FM/AM - RDS C202 4000401 12pF 50V C274 4001127 22pF 50V C203 4001125 15pF 50V C275 4001131 47pF 50V Type 2574 C213 4001120 5.6pF 50V C297 4000401 12pF 50V C221 4001126 18pF C222- 4001119 4.7pF 50V C223 L201 8021385 Coil 108nH...
  • Page 43 List of electrical parts Resistors not referred to are standard, see page 3.13 and 3.14 C17- 4001143 470pF 5% 50V 4001135 100pF 5% 50V 4010274 100nF -20+80% 25V C20- 4001135 100pF 5% 50V C51- 4010323 1µF -20+80% 16V 4010274 100nF -20+80% 25V 8230125 Bulb, 190mA 6.3V 7211134 Socket 6 pole 7210889 Socket 4 pole...
  • Page 44 List of electrical parts C12- 4001143 470pF 5% 50V 4011134 100nF 10% 16V 4011124 15nF 10% 50V 4001131 47pF 5% 50V 4011110 1nF 10% 50V 8020744 Coil 455KHz 8030392 Cer. fi lter 455KHz 7211053 Socket 4 pole PCB20, 8001824 ML interface IC1∆- 8341022 151 4558...
  • Page 45 List of electrical parts Resistors not referred to are standard, see page 3.13 and 3.14 PCB24, 8005304 TR1- 8320755 BC847B Light indication, left 8330387 230 Led red 6276998 Plug 8 pole 6276913 Plug 4 pole PCB25, 8005305 8330387 230 Led red Light indication, right PCB26, 8005315 End stop detector IC1∆...
  • Page 46 List of electrical parts TR27- 8320755 BC847B TR405 8320811 BC857B TR28 TR500 8321159 FMMT489 TR29 8320811 BC857B TR600 8321198 136 PUMX1 TR400- 8321171 FZT790A TR601- 8321197 136 PUMT1 TR401 TR602 TR402- 8320755 BC847B TR603 8321202 PDTC114EU TR404 8300644 250 Z6.2V 2% 0.5W 8300762 250 Z9.1V 2% 0.5W D20-...
  • Page 47 List of electrical parts Resistors not referred to are standard, see page 3.13 and 3.14 8020705 Coil 100µH 10% 8020821 Coil 2.2µH 5% T400 8021159 Transformer 796KHz 7210418 Socket 7 pole 7211227 Socket 16 pole 7210689 Socket 8 pole 7500296 Contact pin 7211221 Socket 4 pole 7210904 Socket 16 pole 7221272 Plug 2/2 pole...
  • Page 48 List of electrical parts 8301218 256 BAT254 D40- 8301045 250 BAS216 8301217 250 STPS3L60S 8301059 256 Z3.3V 2% 0.4W 8301061 256 Z3.9V 2% 0.4W 8301104 250 SM6T15C 5030054 4 x 100KΩ 5% 1/16W 5012382 10KΩ 0.1% 1/4W 5021508 47KΩ 1% 1/4W 5012169 220KΩ...
  • Page 49 List of electrical parts Resistors not referred to are standard, see page 3.13 and 3.14 C114 4001131 47pF 5% 50V C120- 4000466 470pF 5% 100V C115 4011122 10nF 10% 50V C123 C116 4201348 1µF 10% 16V 8021113 Coil 47µH 10% 8020916 Coil 47µH 5% 8020772 Coil 10µH 20% 8020916 Coil 47µH 5%...
  • Page 50 List of electrical parts 3.10 8301045 250 BAS216 D30- 8301045 250 BAS216 8301045 250 BAS216 D35- 8301045 250 BAS216 D12- 8300915 250 GF1M 8301074 256 Z12V 2% 0.4W 8301045 250 BAS216 8301059 256 Z3.3V 2% 0.4W 8301067 250 Z6.8V 2% 0.4W D17- 8301076 256 Z15V 2% 0.4W...
  • Page 51 3.11 List of electrical parts Resistors not referred to are standard, see page 3.13 and 3.14 8020772 Coil 10µH 20% 8021079 Coil 2.2µH 10% 8090182 Crystal 16MHz 7530117 Contact pin 7211229 Socket 20 pole 7221159 Plug 2 pole 7221133 Plug 8/8 pole P54- 7211222 Socket 6 pole 7211053 Socket 4 pole...
  • Page 52 List of electrical parts 3.12 R111- 5013242 2.7KΩ 1% 1/16W R113 5013063 10KΩ 1% 1/16W R112 R116 5013124 1.0KΩ 1% 1/16W 4201359 3.3µF 20% 16V C49- 4011135 100nF -20+80% 16V 4011135 100nF -20+80% 16V 4011135 100nF -20+80% 16V 4011135 100nF -20+80% 16V 4201359 3.3µF 20% 16V 4000424 1nF 5% 50V 4011135 100nF -20+80% 16V...
  • 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 90P1 6270671 FM socket 90P2...
  • Page 54 List of electrical parts 3.14 Resistors SMD 2% 1/8 W SMD 5% 1/8 W x100 x10k x100k x10M 5011623 5011647 5011218 5011227 5011241 5011256 5011267 5011730 Glue dots, approx. 200, part no. 3181932 5011624 5011648 5011669 5011681 5011689 5011694 5011707 5011625 5011649 5011219...
  • Page 55 List of mechanical parts List of mechanical parts 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 Cover 9003 3169064 Secondary keyboard...
  • Page 56 List of mechanical parts List of mechanical parts 9001 9006 9007 9008 9009 9010 9002 9004 9011 9012 Barrierta 9005 9003 9013 9024 9017 9014 9007 9015 9018 9022 9008 9019 9023 9016 9025 9020 9013 9014 9021 9026 9027...
  • Page 57 List of mechanical parts List of mechanical parts Chassis 9063 9064 9030 9065 34MP1 9048 35MP1 90T1 9049 3501 90P1 9050 9066 9040 0102 9051 9067 90P3 9046 90P2 9052 90M2 9053 1401 1402 9040 9041 9042 Barrierta 9032 9043 9068 Barrierta 9069...
  • Page 58 List of mechanical parts List of mechanical parts Chassis 01Module 8000462 PCB1, FM/AM-RDS f/type 2571, 2572, 2573, 2575, 2576, 2577, 2580 9065 3302562 Shield f/wire 8000535 PCB1, FM/AM-RDS f/type 2574 9066 2938277 Bush 0102 2380170 Nut f/FM socket 9067 3124131 Fittings If PCB88 are mounted instead of PCB01 see service manual BeoSound 9000 -3538887/3538888 9068 3131384 Hinge f/glass lid, right...
  • Page 59 List of mechanical parts List of mechanical parts Sledge 9113 9101 30 30 9114 9501 9120 9145 9103 9115 9104 9105 9140 9122 9116 9102 9141 9106 9123 Barrierta 9124 9142 9125 Barrierta 9117 9126 9143 Barrierta 9127 29IL1 Barrierta 9129 9118 9130...
  • Page 60 List of mechanical parts List of mechanical parts Sledge 07Module 8005364 PCB7, Display Survey of screws etc. 2052007 Screw 2.5 x 6mm 7IL1 8230125 Bulb, 190mA 6.3V 2058013 Screw 2.5 x 6mm 2058011 Screw 3 x 5mm 29Module 8005309 PCB29, Lamp 2058015 Screw 2.5 x 10mm 29IL1 8230125 Bulb, 190mA 6.3V...
  • Page 61 List of mechanical parts List of mechanical parts Guide f/wire and ribbon cables Guide f/wire and ribbon cables 22Module 8000514 PCB22, Clamper position 9150 2510178 Holder 9151 3015197 Ribbon cables complete with guide 9152 3151463 Holder 9150 9154 2560284 Cover 9155 2810277 Spring f/wire, right 9156...
  • Page 62 List of mechanical parts 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 3505760 Japanese...
  • Page 63 List of mechanical parts Bracket 2053 9210 9210 2569423 Bracket Survey of screws etc. 2930133 Adjustment bushing 2042211 Screw 4 x 12mm 2930132 Bushing 3103326 Foot, 1 piece 2569438 Wall profi le Parts not shown 3103372 Foot, set incl. screws 3040037 Red adjustment key 3390455 Bag w/parts 3392440 Outer carton...
  • Page 64 List of mechanical parts 4.10 Wall Bracket horizontal 2054 9220 9221 9220 2569470 Wall profi le 9221 3452692 Rear plate Survey of screws etc. 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 4.11 List of mechanical parts Wall Bracket Vertical 2063 9230 9231 9230 2569471 Wall profi le 9231 3452693 Rear plate Survey of screws etc. 3390533 Bag w/parts Parts not shown 3392518 Packing, complete 3502984 Setting-up guide...
  • Page 66 List of mechanical parts 4.12 Stand 2065 9206 Adjustable in two heights 9207 9203 9208 9209 2 2 2 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...
  • Page 67 Adjustments, English 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.
  • Page 68 Mechanical adjustments, English 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 the top plate (15 mm).
  • Page 69 Test modes, English 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.
  • Page 70 Test modes, English 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 for further information, if necessary.
  • Page 71 Test modes, English 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.
  • Page 72 Test modes, English 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.
  • Page 73 Test modes, English 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.
  • Page 74 Test modes, English - 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.
  • Page 75 Test modes, English 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.
  • Page 76 5.10 Test modes, English - 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.
  • Page 77 Test modes, English 5.11 - 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.
  • Page 78 5.12 Test modes, English 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.
  • Page 79 Test modes, English 5.13 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.
  • Page 80 5.14 Theft protection, English 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.
  • Page 81 Theft protection, English 5.15 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 EEPROM.
  • Page 82 5.16 Theft protection, English 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 PAUSE buttons (Keyboard) to key in the four-digit PIN code.
  • Page 83 Replacement of components, English 5.17 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 the theft protection or after 12 hours connected with mains.
  • Page 84 5.18 Repair tips, English 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. Only the signals SWAB and SDAB can be measured during lead-in, i.e.
  • Page 85 Repair tips, English 5.19 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 from the autopositioning system, and the turntable motor may therefore run in the reverse direction.
  • Page 86 Error tree 5.61 5.61 Error tree 5.61 START Reading guide The error tree shown below is intended signal paths to the modules also have Connect PL speakers. (Or as an aid in connection with servicing to be checked. connect pin 2 & 4 in the BeoSound 9000, because the product PL plug).
  • Page 87 5.62 Error tree 5.62 5.62 Error tree From previous page Choose another CD Disconnect 26P96. Short circuit the socket 26P96 PCB35 Are there 5Vpp Does the sledge (corr. placed) Does the pin 1 & 4. Be careful not to damage the socket. (MOTOR CONT.) impulses on 35CP1? move uncontrolled?
  • Page 88 Dismantling and assembly, English 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 dismantling instructions are divided into two main sections: a) A section that describes how to gain access to the individual modules.
  • Page 89 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.
  • Page 90 Dismantling and assembly, English 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...
  • Page 91 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 PCB34 and PCB35 at the rear edge of the product.
  • Page 92 Dismantling and assembly, English 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 product switched on.
  • Page 93 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.
  • Page 94 Dismantling and assembly, English 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.
  • Page 95 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.
  • Page 96 Insulation test, English – Isolationsprüfung, Deutsch 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 mains plug and connect them to one of the terminals of the insulation tester.Connect the other terminal of the insulation tester...

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