Bang & Olufsen BeoLab 12-3 Service Manual
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Bang & Olufsen BeoLab 12-3 Service Manual

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BeoLab 12-3
Type 6232
Service Manual - version 1.0
English
German, French, Italian, Spanish, Dutch, Japanese, Korean and
Simplified Chinese versions are available in the Retail System
This Service Manual must be returned
with the defective parts/back-up suitcase !

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Summary of Contents for Bang & Olufsen BeoLab 12-3

  • Page 1 BeoLab 12-3 Type 6232 Service Manual - version 1.0 English German, French, Italian, Spanish, Dutch, Japanese, Korean and Simplified Chinese versions are available in the Retail System This Service Manual must be returned with the defective parts/back-up suitcase !

  • Page 2: Table Of Contents

    CONTENTS Survey of modules ..............1.1 How to service ................1.2 Troubleshooting – Fault flow chart ..........2.1 Adjustments ................3.1 Replacement of modules ............4.1 Before assembly process – Assembly process – Final check after repair .............. 5.1 Specification guidelines for service use ........6.1 Block diagram ................

  • Page 3: Survey Of Modules

    Survey of modules Survey of modules Modules: PCB04 SMPS PCB30 Digital Sound Engine (DSE) PCB35 ICEpower amplifier (x3) PCB40 Interconnection PCB41 V.CON (not present in all versions) PCB47 LED Indicator PCB48 NTC (x3) PCB68 Signal Switch Speaker units: Tweeter unit Midrange unit Woofer (coscone x2)

  • Page 4: How To Service

    How to service How to service Strategy The repair involves replacement of the module(s). The replaced modules must be returned for repair at the Bang & Olufsen Module Repair department. Error codes as well as an adequate fault description must be returned with each replaced part. For this purpose, use the the Exchange Module section in the Retail Order System.
  • Page 5 How to service Warnings when handling Static electricity Static electricity may damage the product. STATIC ELECTRICITY MAY DESTROY THE PRODUCT Static-protective field service kit A static-protective field service kit must always be used when the product is disassembled or modules are being handled, since the internal electronics are very sensitive to static electricity. Follow the instructions in the Service Manual and use the ESD-mat for both old and new modules.

  • Page 7: Troubleshooting - Fault Flow Chart

    Troubleshooting – Fault flow chart Troubleshooting LED indicator ..................2.2 Description of LED errors ..............2.2 Product Information - Usage data ............. 2.3 Error log ................... 2.3 Test - Sound ..................2.4 Speaker unit check ................2.5 NTC module test ................2.5 Fault flow chart No function, No LED indication ............

  • Page 8: Troubleshooting

    Troubleshooting Troubleshooting LED indicator If errors occur during operation, the product will enter an error state. The LED in the lens tweeter unit indicates the respective error state by changing colour (red/ orange/green), flashing or lit. Description of LED errors - Green Constant lit: Product is ON and no problems is observed.

  • Page 9: Product Information - Usage Data

    Select BeoLab 12-3 and click Launch. Click on the PRODUCT tab (if not already shown). Click + next to each item (BeoLab-> BeoLab 12-3 to expand the menus. Click Info -> Product (the information screen appears). Click the Read button and confirm that product data is read out on the screen.

  • Page 10: Test - Sound

    Troubleshooting Test - Sound It is possible to test each speaker unit/amplifier to check the sound quality, and determine whether the devices are faulty or healthy. For this purpose use ServiceTool and refer to the test section. The Test Sound section features a sound generator which allows the user to send a pure sound directly to the speaker unit.

  • Page 11: Speaker Unit Check

    Troubleshooting Speaker unit check Measure the impedance of the speaker unit to determine if the fault is caused by a defective speaker unit. It is recommended to measure on the terminals on the speaker unit. The speaker unit must be disconnected from the product. ! The shown speaker is only an example Pay special attention to the gasket on the speaker unit.

  • Page 12: Fault Flow Chart

    Fault flow chart Fault flow chart Fault symptom: No function No LED indication Possible causes: Defective PCB04, SMPS Defective PCB30, DSE Disconnect W9 Confirm mains Fault in cable Confirm +5V_Stb at from PCB30, P5. voltage at PCB04, connection PCB04, P4 pin 9-10 Confirm +5V_Stb at P1 pin 1-2 PCB04, P4 pin 9-10...
  • Page 13 Fault flow chart PCB04, P4, pin information 4/4pins > > 1/1pins >< SMPS > > 8/8pins > > >< > > < < < 12/12pins > 2/2pins >< > > > > < < > > >< >< 12/12pins < ><...
  • Page 14 Fault flow chart Fault symptom: No power ON Red LED indication Possible causes: Defective PCB04, SMPS Defective PCB30, DSE Disconnect W9 Confirm mains Fault in cable Confirm +5V_Stb at from PCB30, P5 voltage at PCB04, connection PCB04, P4 pin 9-10 Confirm +5V_Stb at P1 pin 1-2 PCB04, P4 pin 9-10...
  • Page 15 Fault flow chart PCB04, P4, pin information 4/4pins > > 1/1pins >< SMPS > > 8/8pins > > >< > > < < < 12/12pins > 2/2pins >< > > > > < < > > >< >< 12/12pins < ><...

  • Page 16: Led Indicator Is Orange (Constant Lit)

    2.10 Fault flow chart Fault symptom: The product is close to overheating LED indicator is orange (constant lit) Possible causes: Defective PCB35, ICEpower amplifier Defective PCB48, NTC Defective PCB30, DSE Defective speaker unit Disconnect the product from the mains * Approximately 500KΩ at 22°C (72°F) Disconnect W12 Measure the Locate the overheated speaker unit and measure...
  • Page 17 Fault flow chart 2.11 PCB04, P4, pin information 4/4pins > > 1/1pins >< SMPS > > 8/8pins > > >< > > < < < 12/12pins > 2/2pins >< > > > > < < > > >< >< PCB35, P1, pin information 12/12pins <...

  • Page 18: Led Indicator Is Flashing Orange

    2.12 Fault flow chart Fault symptom: The product is in protection LED indicator is flashing orange Possible causes: Defective PCB35, ICEpower amplifier Defective PCB48, NTC Missing or faulty speaker calibration Missing product ID Measure the Locate the overheated speaker unit and measure Replace defective temperature of the the resistance (wires disconnected):...
  • Page 19 Fault flow chart 2.13 PCB04, P4, pin information 4/4pins > > 1/1pins >< SMPS > > 8/8pins > > >< > > < < < 12/12pins > 2/2pins >< > > > > < < > > >< >< PCB35, P1, pin information 12/12pins <...
  • Page 20 2.14 Fault flow chart Fault symptom: No sound from any speaker Green LED indication Possible causes: Line switch settings Defective PCB04, SMPS Defective PCB41*, V.CON Defective PCB30, Digital Sound Engine Confirm that line switch settings is Set line switch correct settings Confirm -20V_ Confirm -20V_...
  • Page 21 8/8pins > > >< > Fault flow chart 2.15 > < < < 12/12pins PCB04, P4, pin information > 2/2pins >< > > > > < < 4/4pins > > > >< > 1/1pins >< >< SMPS > > 8/8pins >...

  • Page 22: Distorted Audio From One Or More Speaker(S)

    2.16 Fault flow chart Fault symptom: Distorted audio from one or more speaker(s) Possible causes: Defective PCB04, SMPS Defective PCB30, Digital Sound Engine Defective PCB35, ICEpower amplifier Defective speaker unit Replace defective Locate/disconnect the speaker unit distorted speaker unit Distorted sound Connect the speaker unit from all speakers? Use ServiceTool to...
  • Page 23 Fault flow chart 2.17 PCB04, P4, pin information 4/4pins > > 1/1pins >< SMPS > > 8/8pins > > >< > > < < < 12/12pins > 2/2pins >< > > > > < < > > >< >< 12/12pins <...
  • Page 24 2.18...
  • Page 25 Adjustments Adjustments Information ..................3.2 Chassis (PCB30, Digital Sound Engine) ..........3.2 Speaker Driver .................. 3.3 Amplifier ..................3.3 LED settings ..................3.3 Software udpate ................3.4...

  • Page 26: Information

    Adjustments Adjustments Information Depending of the repair there might be different kinds of adjustments/alignment to be performed, after maintenance of the product. The adjustments are: Backup and restore of the product ID/serial number Calibration of speaker units Calibration of amplifiers All adjustments has to be done with ServiceTool Adjustments after replacing modules Adjustments or calibration is necessary when the following modules are replaced: PCB30, Digital Sound Engine - backup function is possible:...

  • Page 27: Adjustments

    Adjustments ID Restore The ID Restore function is used when PCB30, Digital Sound Engine is replaced and it is not possible to communicate with the old module. In this case it is necessary to get product data from the ServiceTool (factory data from a database). The following is automatically transferred: ID number Serial number...

  • Page 28: Software Udpate

    Adjustments Software update It is very important that the product is updated to the latest software version before it is returned to the customer. This is to ensure the customer receives the best possible experience. Follow the procedure below: Approach Connect a service PC with ServiceTool.
  • Page 29 Replacement of modules Replacement of modules Modules that can be replaced BeoLab 12-3 in service position ............4.2 Replace PCB30, Digital Sound Engine ..........4.4 Replace PCB04, SMPS ............... 4.5 Replace PCB35, ICEpower amplifier ..........4.6 Replace PCB40, Interconnection ............4.7 Replace PCB47, LED Indicator ............

  • Page 30: Replacement Of Modules

    Replacement of modules BeoLab 12-3 in service position Screw w/lock washer - Remove all cables from the product - Loosen screws* holding the front - Disconnect the two cables to the tweeter Screw w/lock washer and remove the front as shown...
  • Page 31 Replacement of modules - Remove screws TX20 (x2) 12mm TX10 (x2) 10mm - Remove screws TX10 (x8) - Remove screws and lift up the speaker unit - Disconnect cables from the NTC unit and the midrange speaker - Remove the midrange speaker TX10 (x4) 10mm...

  • Page 32: Replace Pcb30, Digital Sound Engine

    Replacement of modules Replace PCB30, Digital Sound Engine ☞ 4.2 BeoLab 12-3 in service position - Remove screws - Lift the shield plate  slightly and remove PCB68    TX10 (x4) - Disconnect the mains cable  - Disconnect cables (x7) ...

  • Page 33: Replace Pcb04, Smps

    Replacement of modules Replace PCB04, SMPS ☞ 4.2 BeoLab 12-3 in service position - Disconnect cables (x4) - Remove screws and PCB04 TX10 (x1) 10mm TX10 (x3)

  • Page 34: Replace Pcb35, Icepower Amplifier

    Replacement of modules Replace PCB35, ICEpower amplifier ☞ 4.2 BeoLab 12-3 in service position Woofer amplifiers (x2) - Disconnect cables (x4) - Remove screws and PCB35 TX10 (x2) TX10 (x4) Tweeter/midrange amplifier - Remove screws and lift up PCB35 - Remove cables and PCB35...

  • Page 35: Replace Pcb40, Interconnection

    Replacement of modules Replace PCB40, Interconnection - Remove all cables from the product - Loosen screws* holding the front - Disconnect the two cables to the tweeter and remove the front as shown *Lock washers TX20 (x2) 12mm TX20 (x4) 12mm - Use a screwdriver to release the screws (just been unscrewed) from the speaker and...

  • Page 36: Replace Pcb47, Led Indicator

    Replacement of modules Replace PCB47, LED Indicator Screw w/lock washer - Remove all cables from the product - Loosen screws* holding the front - Disconnect the two cables to the tweeter Screw w/lock washer and remove the front as shown TX20 (x2) 12mm...

  • Page 37: Replace Pcb48, Ntc

    Replacement of modules Replace PCB48, NTC ☞ 4.2 BeoLab 12-3 in service position - Remove cooling pad - Remove screw and PCB48, NTC ! The disassembly procedure is basically the same for the other NTC unit TX10 (x1) 12mm...

  • Page 38: Replace Pcb68, Signal Switch

    4.10 Replacement of modules Replace PCB68, Signal Switch ☞ 4.2 BeoLab 12-3 in service position - Remove screws - Lift the shield plate  slightly and remove PCB68    TX10 (x4)

  • Page 39: Replace Woofer Units

    Replacement of modules 4.11 Replace woofer units ☞ 4.2 BeoLab 12-3 in service position - Remove cooling pad - Remove screw and PCB48, NTC ! The disassembly procedure is basically the same for the other NTC unit TX10 (x1) 12mm...

  • Page 40: Replace Midrange Unit

    4.12 Replacement of modules Replace midrange unit Screw w/lock washer - Remove all cables from the product - Loosen screws* holding the front - Disconnect the two cables to the tweeter Screw w/lock washer and remove the front as shown TX20 (x2) 12mm...

  • Page 41: Replace Tweeter Unit

    Replacement of modules 4.13 Replace tweeter unit Screw w/lock washer - Remove all cables from the product - Loosen screws* holding the front - Disconnect the two cables to the tweeter Screw w/lock washer and remove the front as shown TX20 (x2) 12mm...
  • Page 42 4.14 Replacement of modules - Remove the filt gasket and the LED lightguide - Remove screws and the tweeter lens unit TX10 (x3) 13mm - Use a peeler to gently remove the decorative top plate - Remove screws and the tweeter unit Use ServiceTool to align the sensivity value printed on the new tweeter unit.

  • Page 43: Before Assembly Process - Assembly Process - Final Check After Repair

    Before assembly process - Assembly process - Final check after repair Before assembly process Critical assembly items Before starting the assembly process there are some very important steps you must be aware of. This is to ensure optimum performance of the speaker and to avoid cables being damaged when assembled.
  • Page 44 Before assembly process Survey of critical assembly items Large screw boss  Small screw boss ! Set of sealings Cabinet / sealing  Screw hole (woofers)  Mounting post  Rubber sealings Cable holder ...
  • Page 45 Before assembly process Explanation Screw boss  The large and small screw bosses are both items that must be totally free from wires. This means that there must be sufficient distance between wires and screw bosses before assembly. If the wires are mounted incorrectly, they will be damaged when the cabinet is assembled with the front baffle.
  • Page 46 Before assembly process Wire placement = Wire holders = Wires not present in all versions Cable tie Cable tie Cable tie...
  • Page 47 Assembly process Assembly process (screw sequence) When the top cabinet is to be assembled with the base     cabinet, the screws must be tightened in the following sequence. Look into the screw holes to ensure that no wires are in the way, before mounting the screws.
  • Page 48 Assembly process When the aluminium front is to be assembled with the speaker cabinet, the screws must be tightened in the following sequence: Align the aluminium front (top/bottom) with the speaker cabinet. Follow the screw sequence below: Be careful not to tighten the screws too hard. If the screws are tightened too hard, there is risk of ...
  • Page 49 Final check after repair Final check after repair The final check after repair describes the activities that are needed to ensure the product will be returned in perfect condition to the customer. Follow the procedures below: Insulation test The product must be insulation tested after having been dismantled. Make the test when the product has been reassembled and is ready to be returned to the customer.

  • Page 51: Specification Guidelines For Service Use

    Specification guidelines for service use Specification guidelines for service use BeoLab 12–3 Type survey Market Variant Type number Albanien, Andorra, Argentina, Australia, Austria, Azerbaijan, Bahrain, Belgium, Botswana, Brazil, Virgin 6232 Islands, Bulgaria, Canada, Chile, China, Croatia, Czech Repub., Denmark, Dominican Repub., Dutch Antilles, Egypt, Estonia, Finland, Faroe Islands, France, Georgia, Germany, Ghana, Greece, Greenland, Holland, Hong Kong, Hungary, Iceland, India, Indonesia, Ireland, Israel, Italy, Japan, Jordan, Kazakhstan, Korea, Kuwait, Latvia, Lebanon, Liechtenstein, Lithuania, Luxembourg, Malaysia, Mexico, Morocco, New...
  • Page 52 Specification guidelines for service use Power Amplifiers 4 channel (Class D, ice Power) Output (short-term) Bass(x2): 160 Watts (bridget module) Output (short-term) Midrange: 80 Watts Output (short-term) Tweeter: 80 Watts Maximum sound pressure level 88 dB (125 mVrms / 1m) Effective Frequency range 45.3 –...

  • Page 53: Block Diagram

    Block diagram Block diagram Block diagram Mains Signal Processing +/- 12V 5V SB Amp_Therm SMPS Amp_OC DC/DC +/-12V SMPS_En Vclip 5V_SB +/-12V Vclip 5V_SB ADC_NTC_MUX_SEL Thermal (A0-2) 3V3_A 3V3_A -18V +/-30V +/-5V Vdrive control 1.2 V 3.3 V Pwr_En NTC1 NTC2 V.CON Pwr.

  • Page 54: Wiring Diagram

    Wiring diagram Wiring diagram Wiring diagram 2/2pins old version (PCB41) > > Interconnection 2/2pins 2/2pins V.CON (1/2) V.CON (2/2) 4/4pins 4/4pins 4/4pins 4/4pins 4/4pins 4/4pins > > > > > > ICEpower amplifier > > > > > > 1/1pins ><...
  • Page 55 Wiring diagram Wiring diagram Wiring diagram new version (no PCB41) Interconnection 2/2pins 2/2pins 4/4pins 4/4pins > > > > ICEpower amplifier > > > > 1/1pins >< > SMPS > > > 8/8pins 8/8pins > > > > >< >< >...
  • Page 56 Available parts Available parts Available parts 9024 Incl. pos. no. 9035 BeoLab 12–3 and wire bundle 9031 Incl. pos. no. 6 Incl. pos. 9008 no. 9014 9025 9016 9009 9010 Incl. pos. no. 9013, 9016 9015 9011 9001 Incl. pos. no.

  • Page 57: Available Parts

    Available parts BeoLab 12-3 9001 3131236 Top reflector 9002 3321762 Decorative top plate 9003 3947183 Tape 9004 3947825 Gasket 9005 8480466 Tweeter incl. wire 9006 3114584 Chassis f/tweeter 9007 3321730 Front incl. pos. no. 9011 3321851 Front, white incl. pos. no. 9011 9008 3131316 Housing f/light guide incl. pos. no. 6 9009 3131225 Reflector/light guide 9010 3912152 Felt 9011 3340410 Set of gaskets - front 9012 8480506 Midrange incl. PCB48...
  • Page 58 Available parts 1 2831037 Pin 2.5 x 10mm Survey of screws etc. 2 2019030 Screw 3.5 x 8mm 3912008 Felt 4 2013243 Screw 3 x 16mm 2622041 Washer 3340378 Gasket 7 2054012 Screw 3 x 10mm 8 2015185 Screw 3 x 13mm 9 2044062 Screw 4 x 16mm 2052011 Screw 3 x 10mm 2052111 Screw 4 x 20mm 3376238 Gap pad 3170361 Gap pad 2039003 Screw 3 x 12mm 7530131 Tab faston 2013153 Screw 3 x 6mm...
  • Page 60 Bang & Olufsen DK-7600 Struer Denmark 3538176 12-02...

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