BO-BeoSound4_type28xx-sm维修电路原理图.pdf

BeoSound 4Type 2851, 2852, 2853, 2854, 2855, 2857, 2858, 2859, 2860Service Manual EnglishGerman, French, Italian, Spanish, Danish, Dutch and Japanese versions are available in the Retail SystemThis Service Manual must be returned with the defective parts/back-up suitcase !RadioFans.CN 收音机爱 好者资料库CONTENTSSurvey of modules . 1.1How to service . 1.2PIN-code . 1.3Warnings . 1.5Final check after repair . 1.6Fault flow chart . 2.1Placement of measuring points . 2.2Placement of magnet . 2.11Service mode . 3.1Service tips . 4.1Repair tips . 4.2Replacement of modules . 5.1Specification guidelines for service use . 6.1Wiring diagram . 7.1Available parts . 8.1RadioFans.CN 收音机爱 好者资料库Survey of modules 1.1PCB1 . SocketPCB2 . MasterPCB3 . MagicPCB4 . LightPCB5 . Turn wheelPCB6 . Main microprocessorPCB7 . CodecPCB8 . TachoPCB9 . HeadphonePCB10 . DisplayPCB11 . SD/MMC card readerPCB12 . Switch37Module . DABPCB61 . SMPSPCB85 . FM tuner EU/JP96Module . CD unitSurvey of modules37 2 10 12 8 96 61 85 5 5 9 3 4 4 7 11 1 Keyboard 61.2 How to serviceHow to serviceConverting mains supply voltageThe unit has separate type nos. for each market, due to country approvals.The mains voltage is determined by the type nos. of the unit, there are only two internal mains voltage settings (a jumper) on the SMPS, 100/120V and 230/240V AC (P108, when mounted = 100/120V).Front line serviceThe BeoSound 4 unit has been developed for simple module exchange to follow the on-site service strategy. Module exchange is possible onsite, in the shop or in the service workshop whatever is most convenient in each case. For on-site service a back-up suitcase must be used. Module exchange is the recommended way to perform service, due to the fact that most of the modules are multi-layer based, and most of the circuits are on a single main PCB. An electrical fault symptom can be removed during one visit to the customers home, if you bring a BeoSound 4 back-up suitcase with you. Is it a mechanical symptom, the particular part must be brought with you separately.Service documentationService documentation for BeoSound 4 will be a Service manual with part no. for the back-up suitcase, electrical and mechanical parts, users guides etc.PIN-code 1.3PIN-codeThe product has a 4 digit PIN-code, of the users own choice, which must be entered if the product has been disconnected from the mains for 15-30 min.If the PIN-code is activated, and the product has been without mains for 15-30 min., the user will be asked to enter the 4 digit PIN-code when the product is switched on.Before the product is handed in to service it is a good idea to ask the customer to deactivate the PIN-code.The PIN-code is activated when the product is shipped from Bang & Olufsen.Refer to the user guide for further information.PIN-code active prior to serviceIf the PIN-code is not deactivated prior to service you must use the Service code to unlock the product.Service codeThe service code- unlocks the product, but does not affect the pin-code setting- gives you 12 hours service timeEntering the Service code1. When the product asks for PIN-CODE press and hold l for 3 seconds.2. The Master code menu appears.3. Enter the Service code: 1 1 1 1 1.Important notice concerning Service timeThe service time is active as long as the product is connected to the mains, including Standby.To obtain maximum service time:Only connect the product to the mains while you are performing actual service on the product.When the service time is expired, the product can only be unlocked by entering the PIN-code or the Master code.Registration of the modulesThe modules will be registered to the product in the following situations:- the product has been connected to the mains for more than 12 hours, including Standby time.- the PIN-code is activated or deactivated.PIN-code deactivated by customer prior to serviceWith the PIN-code deactivated prior to service you must be aware of the modules will be registered to the product in the following situations:- the product has been connected to the mains for more than 12 hours, including Standby time.- the PIN-code is activated or deactivated.The registration of modules in the product can only be changed at Bang & Olufsen.1.4 PIN-codeActivate the PIN-codeSelect the SETUP menu.Press l twice and then STOP to bring up the PINCODE SETUP menu.Enter the 4 digit Pin-code. Re-enter the code to confirm it and press GO.If you want to change or delete the PIN-code, enter the correct PIN-code and press GO.It is now possible to change the PIN-code or delete the PIN-code. Enter the PIN-codeIf the PIN-code is activated and the product is disconnected from the mains for more than15-30 minutes, a PINCODE menu appears as soon as the product is switched on.Enter the PIN-code, and the product starts again.If the PIN-code has been forgottenIf the PIN-code has been forgotten the only way to unlock the product again is by entering a 5 digit Master-code.The Master-code is ordered by sending a request via the Retail System.When the product prompts for a PIN-code, press and hold l down to bring up the MASTERCODE menu.Enter the Master-code and press GO. This will deactivate the PIN-code and reactivate the product.Product locked by PIN-codeThe product is locked by PIN-code when:- The PIN-code is activated and the mains is disconnected for more than 15- 30 minutes.The product is unlocked when the PIN-code is entered.The PIN-code counter is set to 5 attempts within 3 hours.When a wrong PIN-code has been entered 5 times within 3 hours, the product cannot receive any commands for a period of 3 hours.After this period the PIN-code counter is reset.The product must be in standby mode to activate the timer.Warnings 1.5WarningsESDWhen electrical replacements or disassembly all taking place, use an ESD-mat. The internal electronics are very sensitive to static electricity.When mains voltage on BeoSound 4 is required, remove the connection from BeoSound 4 to the ESD mat.Laser exposureBeoSound 4 contains a laser system and is classified as a class 1 laser product.BeoSound 4 must be opened by qualified personal only.General warningsWear cotton gloves to avoid fingerprints on the product. The display surface on the product is very sensitive, so handling should be done with great care to avoid damage. When transporting BeoSound 4, it is recommended to use the product cover, part no. 3375490.Be sure that the plugs in each end are connected correctly.CleaningClean BeoSound 4 surfaces using DuPont Polishing Cloth, part no. 3624018. Finally clean the front glass with DuPont Final Tack Cloth. It prevents electrostatic buildup. Never use alcohol or other solvents to clean any parts of BeoSound 4. CLASS 1 LASER PRODUCTSTATIC ELECTRICITYMAY DESTROY THEPRODUCTFinal check after repairIsolation testEach 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 to the chassis pin of the aerial socket.NOTE!To avoid damaging the set, it is essential that both terminals of the insulation tester have good contact. Slowly turn the voltage control of the insulation tester until a voltage of 2.5 kV and max. 5 mA is obtained. Maintain that voltage for one second, and then slowly turn it down again.Isolation test at the customer Remove the mains cable from the wall outlet. Place a jumper across the two AC plug prongs. Use a multi-meter, set for measurements in the ohm-area. Place one lead from the multi-meter on the AC plug and place the other lead on ground at the power link plug. The resistance during this measurement must be of 1 mega ohm or more. Resistance measured below 1 mega ohm indicates an abnormal situation and corrective action must be taken.Test of the deviceAfter the insulation test, it is important to do the final test of the device, to make sure there are no other faults.1. Turn on BeoSound 4 and load a CD. Play the CD.2. Switch to SD play mode.3. Switch to FM radio and make a tuning. 4. Switch to DAB radio and make a tuning.5. Use volume up/down.6. Make sure that both the remote control and the buttons work perfectly.Before finishing the device, make sure that the option setting is correct.1.6 Final check after repairFault flow chart 2. Fault flow chartInstructionsInstructions before trouble shooting in the fault flow chart: In the following fault flow chart BeoSound 4 is named BS4. Never connect or disconnect a socket, when the power is turned on. Disconnect the mains supply and wait minimum 30 seconds for the electrolytic capacitors to discharge. When measuring voltages BS4 must be in CD mode,When fault finding in CD use Bang & Olufsens test CD 363403 (SBC444A).2.2 Fault flow chartPlacement of measuring points6V - IC000 pin5V_CD - IC000 pin5Mains supply - P05V_SB2V - IC pin8-2V - IC pin49V_CDFault flow chart 2.3 uPH86V5V_CD9V_CDMains supplyP0back of display5V_SBHeadphone jack-2V+2V2.4 Fault flow chartFault symptom: - Fault in voltages Possible causes: - PCB6, SMPS - ConnectionsMeasure mains supply Fuse F0 OK?Measure connection to Socket, PCB OK?Re-establish connectionMeasure 2V, -2V, 6V 5V_SB OK?Measure all connections in BS4 are all rightChange PCB6, SMPSFault symptom: - Front glass does not close Possible causes: - Bright light shining on the product - PCB3, MagicUse menu to change sensitivity of the door censors OK?Lift the front glass a little Push “Load” Front glass opensBS4 is placed in bright light?NoYesMeasure connections or replace PCB3, MagicMove BS4 to another place OK?Fault flow chart 2.5 Fault symptom: - No stand-by light - Unable to use/remote BS4 Possible causes: - PCB6, SMPS - Fuse F0Measure mains supply Fuse F0 OK?Replace defect fuseConnections from PCB6 to other boards OK?Re-create connectionReplace PCB6, SMPSFault symptom: - No sound in headphone Possible causes: - PCB9, headphone connector - PCB2, MasterUnplug headphone Sound in speaker?Switch to FM Sound in speaker?Change PCB2, MasterPlug another headphone Sound in headphone?Connection from PCB2 to PCB9 OK?Re-establish connectionChange PCB9, HeadphoneNoYesChange PCB2, Master2.6 Fault flow chartFault symptom: - Unable to remote with turn wheel Possible causes: - Connection not OK - Defect turn wheel - PCB3, Magic open defectBoth wheels defectConnection to PCB5, PCB3 and keyboard OK?Change defect PCB5, Turn wheelConnection to PCB5, PCB3, PCB6 and keyboard OK?Re-establish connectionKeyboard OK?Change PCB3, MagicFault symptom: - Unable to use MasterLink Possible causes: - Wrong option setting - ML cable - PCB2, MasterNoYesCheck option setting Refer to user guide OK?Check ML cable e.g. try another cable Connect to another product OK?Change PCB2, MasterChange cableFault symptom: - No power - Stand-by led not lit - Unable to remote Possible causes: - PCB6, SMPSMeasure connection to PCB6, SMPSMeasure mains supply Fuse F0 OK?Re-establish connection Change fuseChange PCB6, SMPSFault flow chart 2. Fault symptom: - Unable to play CD (test CD) - No disc rotation - Playback with SD card OK - Cable connection to CD PCB OK Possible causes: - Focus problem - PCB6, CD board - PCB96, CD unitEstablish fault symptom with B&O Test CD Fault symptoms established?Establish the fault with customers CD Check the disk for visible defects Report fault and send the customer CD to B&O for analyseClean lens with isopropyl alcohol and play disk OK?Measure supply voltages to CD mechanism PCB2, IC00 pin5 - 5V PCB2, IC003, pin4 - 9V Measure connections are correctly connectedMeasure supply voltages to CD mechanism PCB2, IC000, pin - 6V PCB2, IC003, pin2 - 2VChange PCB6, SMPSChange PCB96, CD unitChange PCB2, MasterFault symptom: - Regular dropouts/mute when playing CD - CD stops playing/rotating - CD search problem Possible causes: - Tracking problem - Dirty lens - PCB6, CD board - PCB96, CD unitEstablish fault symptom with B&O Test CD Fault symptoms established?Establish the fault with customers CD Check the disk for visible defects Report fault and send the customer CD to B&O for analyseClean lens with isopropyl alcohol and play disk OK?Measure supply voltages to CD mechanism PCB2, IC00 pin5 - 5V PCB2, IC003, pin4 - 9V Measure connections are correctly connectedChange PCB6, SMPSMeasure supply voltages to CD mechanism PCB2, IC000, pin - 6V PCB2, IC003, pin2 - 2VNoYesChange PCB96, CD unitChange PCB2, Master2.8 Fault flow chartFault symptom: - Fault in display - Only a few lines are faulty Possible causes: - PCB0, display - Connections to displayMeasure connections to the display is OK?Re-establish connectionChange PCB0, Display OK?Change PCB2, MasterFault symptom: - Fault in display - Nothing in display - Stand-by led OK - Able to remote - Able to play CD Possible causes: - PCB0, display - Connections to displayChange PCB0, Display OK?Change PCB2, MasterFault symptom: - Unable to play FM - CD plays OK Possible causes: - PCB85, tuner - PCB6, SMPSMeasure voltages +2VReplace PCB6, SMPSMeasure connections to tuner OKReplace PCB85, tunerNoYesFault flow chart 2.9 Fault symptom: - Unable to play DAB - CD plays OK - FM plays OK Possible causes: - PCB3, DAB - PCB6, SMPSMeasure voltages +6VReplace PCB6, SMPSDAB aerial is mountedMeasure connections to DAB OKReplace PCB3, DABFault symptom: - Unable to open front glass Possible causes: - PCB3, Magic door censor - PCB6, SMPS - MotorLift the glass so the keyboard is visible Press the “Load” button The front glass slides up?Measure connection to PCB3, MagicMeasure voltages 5V_SB & 6VChange PCB6, SMPSBS4 in service position Measure connection to PCB3, Magic Confirm voltage 5V_SB & 6VChange PCB6, SMPSChange PCB3, MagicChange PCB2, MasterChange PCB2, MasterChange PCB3, Magic OK?NoYes2.0 Fault flow chartFault symptom: - The front glass slides to the top without stopping above the keyboard Possible causes: - PCB8, TachoConnection to PCB8, Tacho OK?Re-establish connectionChange PCB8, Tacho OK?Replace PCB2, MasterReplace motor unitFault symptom: - Unable to load CD - Front glass does not open - Front glass slides down a little and nothing else happens Possible causes: - PCB2, Switch - PCB2, MasterCheck if the magnet on the door mechanism is mounted See figure page 2.Measure connection to PCB8, Tacho & PCB2, SwitchDoor mechanism must be in lower position Measure 3.3V PCB2 P pin2Change PCB2, MasterChange PCB2, SwitchFault symptom: - No sound in loudspeaker and/or headphone - Radio/DAB OK - CD OK Possible causes: - PCB2, Master - PCB, SocketMeasure voltages OK?Change PCB6, SMPSChange PCB2, MasterChange PCB, SocketNoYesFault flow chart 2. Placement of magnet2.2Service Mode 3.Not completed3. Service ModeNot completedService tips 4.Service tipsService toolAlong with a Cable kit for ServiceTool (3375397) and a P.I.T. box (3375055) it