Bang & Olufsen BeoSound 4 2857 Service Manual

BeoSound 4Type 2851, 2852, 2853, 2854, 2855, 2857, 2858, 2859, 2860Service Manual EnglishGerman, French, Italian, Spanish, Danish, Dutch and Japanese

2.2 Fault flow chartPlacement of measuring points6V - IC1000 pin15V_CD - IC1000 pin5Mains supply - P1015V_SB12V - IC1 pin8-12V - IC1 pin49V_CDABO-C

Fault flow chart 2.3 @uPH86V5V_CD9V_CDMains supplyP101@back of display5V_SB@Headphone jack-12V+12VABO-CENTER v/HENRIKSENS ELEKTRONIK

2.4 Fault flow chartFault symptom: - Fault in voltages Possible causes: - PCB61, SMPS - ConnectionsMeasure mains supply Fuse F101 OK?Measure

Fault flow chart 2.5 Fault symptom: - No stand-by light - Unable to use/remote BS4 Possible causes: - PCB61, SMPS - Fuse F101Measure mains

2.6 Fault flow chartFault symptom: - Unable to remote with turn wheel Possible causes: - Connection not OK - Defect turn wheel - PCB3, Mag

Fault flow chart 2.7 Fault symptom: - Unable to play CD (test CD) - No disc rotation - Playback with SD card OK - Cable connection to CD PC

2.8 Fault flow chartFault symptom: - Fault in display - Only a few lines are faulty Possible causes: - PCB10, display - Connections to dis

Fault flow chart 2.9 Fault symptom: - Unable to play DAB - CD plays OK - FM plays OK Possible causes: - PCB37, DAB - PCB61, SMPSMeasure

2.10 Fault flow chartFault symptom: - The front glass slides to the top without stopping above the keyboard Possible causes: - PCB8,

Fault flow chart 2.11 Placement of magnetABO-CENTER v/HENRIKSENS ELEKTRONIK

CONTENTSSurvey of modules ... 1.1How to service ...

2.12ABO-CENTER v/HENRIKSENS ELEKTRONIK

Service Mode 3.1Not completedABO-CENTER v/HENRIKSENS ELEKTRONIK

3.2 Service ModeNot completedABO-CENTER v/HENRIKSENS ELEKTRONIK

Service tips 4.1Service tipsService toolAlong with a Cable kit for ServiceTool (3375397) and a P.I.T. box (3375055) it is possible to flash-update

4.2 Repair tipsRepair tipsCDThe diodes and the laser are very sensitive to static electricity. Damaging the diodes or laser may reduce their lives

5.1Replacement of modulesReplacement of the PCB61 (SMPS)When replacing PCB61 (SMPS), remember to check jumper at 61P108Mains voltage 115V = jumper at

5.2Disassembly overviewPCB Module name Page1 Socket 5.52 Master 5.63 Magic 5.84 Light 5.95 Turn wheel 5.106 Main microprocessor 5.77 Codec 5.118 Tacho

5.3- Push front glass to top position and remove it- Remove all cables4xTX10- Remove screw covers at top - and all screws- Remove cablesBeoSound 4 in

5.4- Remove screws at front3xTX10- Remove screws at socket panelRemove Chassis+ 5.3 BeoSound 4 in Service Position4xTX10- Remove cables- Pull out ch

5.5Replace PCB1, Socket- Pull off socket cover- Remove plugs- Remove screws+ 5.3 BeoSound 4 in Service Position- Remove plugs+ 5.4 Remove Chassis

Survey of modules 1.1PCB1 ... SocketPCB2 ... MasterPCB3 ... MagicPCB

5.6Replace PCB2, Master2xTX10- Remove electrical chassis from mechanical chassis- Remove cables PCB22P10042P1008+ 5.3 BeoSound 4 in Service Position

5.7- Remove screws6xTX10- Remove plugs on the back of PCB2Replace PCB2, Master2P10052P10132P10102P10122P1011- Transfer EEPROM softwareIC3IC6 EEPROMPCB

5.8+ 5.3 BeoSound 4 in Service Position- Remove screws- Remove PCB3, Magic+ 5.4 Remove ChassisReplace PCB3, Magic2xTX7➁➀➀- Remove PCB9, Headphone

5.9Replace PCB4, Light+ 5.3 BeoSound 4 in Service Position- Remove PCB4, Light+ 5.27 Remove finger nicheABO-CENTER v/HENRIKSENS ELEKTRONIK

5.10- Remove cable- Release snaplocks and push outReplace PCB5, Turn wheel and parts (left and right)+ 5.3 BeoSound 4 in Service Position- Dismantle

5.11Replace PCB7, Codec7P1007P101- Remove plugs- Remove screw1xTX102xTX10- Remove electrical chassis from mechanical chassis+ 5.3 BeoSound 4 in Serv

5.12Replace PCB8, Tacho+ 5.3 BeoSound 4 in Service Position+ 5.4 Remove Chassis- Remove screws and plug+ 5.23 Remove Clamper unit3xTX10- Remove

5.13Replace PCB9, Headphone+ 5.3 BeoSound 4 in Service Position- Remove PCB9, Headphone+ 5.4 Remove Chassis➀➀+ 5.8 Remove PCB3, Magic➁ABO-CENT

5.14Replace PCB10, Display3xTX10- Remove screws- Remove cable+ 5.3 BeoSound 4 in Service PositionCON1Plug with lock! CON1ABO-CENTER v/HENRIKSENS ELE

5.15Replace PCB11, SD/MMC card reader+ 5.3 BeoSound 4 in Service Position- Remove screws- Pull out PCB11, SD/MMC card reader2xTX6ABO-CENTER v/HENRIK

1.2 How to serviceHow to serviceConverting mains supply voltageThe unit has separate type nos. for each market, due to country approvals.The mains

5.16Replace PCB12, Switch+ 5.3 BeoSound 4 in Service Position- Remove screw+ 5.4 Remove ChassisABO-CENTER v/HENRIKSENS ELEKTRONIK

5.17Replace PCB61, SMPS7P1007P101- Remove plugs- Remove screws4xTX102xTX10- Remove electrical chassis from mechanical chassis+ 5.3 BeoSound 4 in Ser

5.18Replace PCB85, FM tuner- Remove screws- Remove plugs on th back of PCB85+ 5.3 BeoSound 4 in Service Position3xTX10+ 5.4 Remove chassis85P10685

5.19Replace 96Module, CD unit2xTX10- Remove electrical chassis from mechanical chassis+ 5.3 BeoSound 4 in Service Position- Remove screws and releas

5.20- Remove plugs- Remove screws+ 5.3 BeoSound 4 in Service Position3xTX10Replace 37Module, DAB+ 5.4 Remove chassis37P20137P101ABO-CENTER v/HENRI

5.21Replace Cabinet+ 5.3 BeoSound 4 in Service Position+ 5.4 Remove Chassis+ 5.8 Remove PCB3, Magic+ 5.24 Remove BaseABO-CENTER v/HENRIKSENS

5.22Replace clamper cover+ 5.3 BeoSound 4 in Service Position+ 5.4 Remove Chassis- Release snaplocks+ 5.23 Remove Clamper unitABO-CENTER v/HENR

5.23Replace Clamper unit+ 5.3 BeoSound 4 in Service Position+ 5.4 Remove Chassis4xTX10- Remove screws- Lift off clamper Note! Take care that the

5.244xTX10Replace Base+ 5.3 BeoSound 4 in Service Position- Remove screws+ 5.4 Remove ChassisABO-CENTER v/HENRIKSENS ELEKTRONIK

5.25Replace door mechanism+ 5.3 BeoSound 4 in Service Position+ 5.4 Remove Chassis+ 5.23 Remove Clamper unit+ 5.12 Remove Motor unit- Check t

PIN-code 1.3PIN-codeThe product has a 4 digit PIN-code, of the user´s own choice, which must be entered if the product has been disconnected from

5.26Replace drivebelt+ 5.3 BeoSound 4 in Service Position+ 5.4 Remove Chassis- Remove screws and plug+ 5.23 Remove Clamper unit3xTX10- Remove s

5.27- Remove finger niche Note: lift free of “lock”4xTX6Replace Finger niche+ 5.3 BeoSound 4 in Service Position- Remove screws➀➁ABO-CENTER v/HENRI

5.28- Remove screws- Pull out keyboard4xTX6Replace keyboard+ 5.3 BeoSound 4 in Service Position- Remove cables+ 5.15 Remove SD/MMC card reader+ 5

5.29Replace motor+ 5.3 BeoSound 4 in Service Position+ 5.4 Remove Chassis- Remove screws and plug+ 5.23 Remove Clamper unit3xTX10- Remove screw

5.30ABO-CENTER v/HENRIKSENS ELEKTRONIK

Specification guidelines for service use 6.1Specification guidelines for service use BeoSound 4With FM and RDS Type 2851 EU 230V Type 2852 GB 2

6.2 Specification guidelines for service useDynamic range (1kHz) ≥92dBChannel unbalance (1kHz) ≤±1dBTHD+Noise:1kHz, 0 dBFS, volume 76 -85dB / -7

Specification guidelines for service use 6.3Audio Aux Input/Output x 1 AUX in L/R Phono 2V RMS 22 – 47kW  AUX out L/R Phono 1.3V RMS ±0.2 <

6.4ABO-CENTER v/HENRIKSENS ELEKTRONIK

7.1 Wiring diagramWiring diagram 7.1 7.1Wiring diagram>><><><<6200357W136200357W14W276277880P101>>>>>&g

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.

8.1 Available partsAvailable parts 8.18.1Available partsBeoSound 4900390029001Incl. PCB12

Available parts 8.2BeoSound 49001 3110018 Movable mechanics incl. PCB129002 3162231 Front9003 3162228 Glass9004 3341017 Screw cover, left

8.3 Available partsFront9012 3162232 Finger niche incl. 2 x PCB49013 3162233 Front cover incl. pos. no. 90169014 2791022 Set of wheels incl

Available parts 8.4CD unit and Motor9017 3320949 CD unit9018 3162230 Clamper cover9019 2755082 Gear unit9020 2732127 Belt9021 8400025 M

8.5 Available partsElectrical chassis9025 3110010 Holder f/PCB2 and PCB379026 3110012 Holder f/PCB619027 3110011 Holder f/PCB7 and PCB85902

Available parts 8.6Wire bundlesSee wiring diagram page 7.1.The part no. is printed on the diagram above the wire bundle, as shown.Parts not shown

8.7 Available partsPacking9301 3396308 Foam, set of top and bottom9302 3917143 Foam foil9303 3392385 Outer carton9301930293019303ABO-CENTER

Floor Stand 21801218011Available parts 8.89101 3932012 Tube incl. pos. nos. 9102, 19102 2369003 Cable clip9103 3162237 Cover plate9104 310

8.9 Available partsWall bracket 218112181113 2019035 Screw 4 x 12mm 3390071 Bag w/parts 3507400 Guide333ABO-CENTER v/HENRIKSENS ELEKTRONIK

ABO-CENTER v/HENRIKSENS ELEKTRONIK

Warnings 1.5WarningsESDWhen electrical replacements or disassembly all taking place, use an ESD-mat. The internal electronics are very sensitive

Bang & OlufsenDK-7600 StruerDenmarkPhone +45 96 84 11 22*Fax +45 97 85 39 113538035 04-06ABO-CENTER v/HENRIKSENS ELEKTRONIK

Final check after repairIsolation testEach set must be insulation tested after having been dismantled. Make the test when the set has been reassembled

Fault flow chart 2.1 Fault flow chartInstructionsInstructions before trouble shooting in the fault flow chart:• In the following fault flow chart Beo