Bang & Olufsen BeoLab 20 Service Manual
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Bang & Olufsen BeoLab 20 Service Manual

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BeoLab 20
Type 6791 – 6797, 6799
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 !
39.3
30.4

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Summary of Contents for Bang & Olufsen BeoLab 20

  • Page 1 BeoLab 20 Type 6791 – 6797, 6799 Service Manual - version 1.0 English German, French, Italian, Spanish, Dutch, Japanese, Korean and Simplified Chinese versions are available in the Retail System 39.3 30.4 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 Repair tips ................2.1 Fault flow chart ................ 2.5 Survey of plugs and pins ............2.11 Adjustments - Final check after repair ........3.1 Replacement of modules ............4.1 Specification guidelines for service use ........

  • Page 3: Survey Of Modules

    Survey of modules Survey of modules 48.1 02.2 48.2 02.1 48.3 35.1 35.2 Modules PCB02.1 Input Panel PCB02.2 Connector Interface PCB04 Power Supply PCB30 Digital Sound Engine PCB35.1 Amplifier PCB35.2 Amplifier PCB47 LED Indicator PCB48.1 PCB48.2 PCB48.3 PCB68 Switch Panel PCB89 Wireless Power Link Rx Speaker units...

  • Page 4: How To Service

    How to service How to service Strategy This product is to be serviced in the customer’s home. 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.
  • 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.

  • Page 7: Repair Tips

    Repair tips – Fault flow chart Repair tips Check cables ..................2.2 Check for newest SW ............... 2.2 Backup ..................... 2.2 Restore ..................... 2.2 Error Log ..................2.2 Autocalibrate ..................2.2 LED indicator ..................2.2 Description of LED indications ............2.2 Product Information - Usage data .............

  • Page 8: Check Cables

    Always check all external cables as well as internal cables. Check for newest SW Always ensure to have the newest software version installed. This is done via the ServiceTool. Select BeoLab 20 > Software > Automatic Software Update. The ServiceTool also includes noise and sound sources for testing. Backup Before starting the fault finding activity make a complete backup of the product by means of the ServiceTool (see under Repair >...

  • Page 9: Product Information - Usage Data

    - Select COM port - ATI COM port - Scroll down to BeoLab section. - Select BeoLab 20 and click Launch. - Click on the PRODUCT tab (if not already shown). - Click + next to each item to expand the menus.

  • Page 10: Speaker Unit Test

    - Be sure that ServiceTool is updated to the latest version. If not, upgrade and restart ServiceTool. - Scroll down to BeoLab section. - Select BeoLab 20 and click Launch. - Click on the PRODUCT tab (if not already shown). - Click + next to each item to expand the menus.

  • Page 11: No Function And No Led Indication

    Fault flow chart Fault flow chart Fault symptom: No function and no LED indication Possible causes: Defective PCB02.1, Input Panel Defective PCB04, Power Supply Is the speaker in a Defective PCB30, Digital Sound Engine wireless setup Defective PCB35.1/2, Amplifier Incorrect role switch setting Confirm that the Confirm that the role switch setting...
  • Page 12 Fault flow chart From Connect to a source via: Power Link, TOSLINK or line-in signal Set role switch to R or L Replace PCB30, Connect ServiceTool cable to Confirm Digital Sound SERVICE connector. Repair/replace PS_ON = 3.3V at Engine Check connection between connection PCB04, P14 pin 7 Use ServiceTool to...

  • Page 13: Led Indicator Is Flashing Quickly Orange

    Fault flow chart Fault symptom: LED indicator is flashing quickly orange (The product is in protection mode) Disconnect product Possible causes: from mains, wait 2 Defective PCB30, Digital Sound Engine minutes and Defective PCB35.1/2, Amplifier reconnect to mains Defective PCB48.1/2/3, NTC Tweeter / Mid- range / Woofer Defective speaker unit Make an...

  • Page 14: No Sound From Speaker In A Wired Setup

    Fault flow chart Fault symptom: No sound from speaker in a wired setup Possible causes: Confirm that the role switch setting Defective PCB04, Power Supply is correct Set role switch Defective PCB30, Digital Sound Engine Defective PCB35.1/2, Amplifier Incorrect role switch setting Connect ServiceTool and read out Error Log.

  • Page 15: No Sound From Speaker In A Wireless Setup

    Fault flow chart Fault symptom: No sound from speaker in a wireless setup Possible causes: Confirm that the Defective PCB04, Power Supply role switch setting Defective PCB30, Digital Sound Engine is correct Set role switch Defective PCB35.1/2, Amplifier Defective PCB89, Wireless Power Link Rx Incorrect role switch setting Reset the speaker Connect ServiceTool and read out Error Log.

  • Page 16: Missing, Atttenuated Or Distorted Sound From Speaker And No Error Indication In Error Logs

    2.10 Fault flow chart Fault symptom: Missing, atttenuated or distorted sound from speaker and no error indication in error logs Check Possible causes: Make an autocali- PCB30, Digital Sound Engine, PCB35.1 Ampli- bration using the Defective PCB04, Power Supply fier, PCB35.2 Amplifier and cables W5/W7. Defective PCB30, Digital Sound Engine ServiceTool.

  • Page 17: Survey Of Plugs And Pins

    PCB02.1, Input Panel PCB35, Amplifier Solder side POWER LINK POWER LINK TOSLINK TOSLINK TOSLINK TOSLINK Service Component side BeoLab 20, Connection Panel and switches POWER LINK SERVICE R-INPUT-L IN-TOSLINK-OUT PCB30, Digital Sound Engine PCB02.2, Connector Interface Tweeter side FREE RESET WALL CORNER ROLE POS.
  • Page 18 2.12 2.12 2.12...

  • Page 19: Adjustments - Final Check After Repair

    Adjustments - Final check after repair Adjustments - Final check after repair Adjustments Information ..................3.2 PCB30, Digital Sound Engine ............3.2 PCB35, Amplifier ................3.3 PCB89, Wireless Power Link Rx ............3.3 Connecting speaker wirelessly ............3.4 Speaker units ..................3.4 Software update ................

  • Page 20: Adjustments

    ID number Serial number Type number Item number Calibration of speaker units Calibration of the amplifier Product settings Wireless data A new calibration of the amplifier is performed again. Connect ServiceTool, launch BeoLab 20 and follow the procedure under Repair.

  • Page 21: Pcb35, Amplifier

    Repair > Chassis > Replace After replacement of the Wireless Power link Rx module connect ServiceTool, launch BeoLab 20 and follow the procedure under Repair > Chassis > Replace and follow Instructions carefully. Continue by making a software update under Software > Automatic Software...

  • Page 22: Connecting Speaker Wirelessly

    Calibration of speaker driver is necessary when a speaker unit is replaced. The aim is to ensure optimal sound even if the new speaker unit varies from the old speaker unit. Use the read function to enable the calibration data fields. Connect ServiceTool, launch BeoLab 20 and follow the procedure under Adjustments.

  • Page 23: Software Update

    ServiceTool. Select COM port - ATI COM port Scroll down to BeoLab section. Select BeoLab 20 and click Launch. Click on the PRODUCT tab (if not already shown). Click + next to each item to expand the menus. Click Software -> Automatic Software Update...

  • Page 24: Final Check After Repair

    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 25 Replace Woofer ..................4.25 Warning – Disconnect mains and wait 45 seconds before dismantling The BeoLab 20 Power Supply and the local power supplies on the different modules must be discharged before dismantling. This is done by disconnecting from the mains, and then waiting 45 seconds before replacing any modules.

  • Page 26: Replacement Of Modules

    Replacement of modules BeoLab 20 in service position 1 - Remove connector cover - Remove external cables connected to the product - Apply protection stocking over lens - Gently lift decoration ring by using the peeler tool...
  • Page 27 Replacement of modules - Lift tweeter decoration ring and turn 90° counter clock wise - Wrap excessive protection stocking over the decoration ring to fixate this towards the top of the lens - Remove screws ! Attention: Use allen key with bald end ! Attention: Do not scratch the lens parts 2.5mm - Disconnect cable...
  • Page 28 Replacement of modules - Pull to remove fabric frame - BeoLab 20 in service position 1...
  • Page 29 Cable holders - Open cable holders Cable holders - BeoLab 20 - seen from top - indicating cable placement ! Attention cables - Move cable connected to PCB30, P3 to same side as connector P3 - Release cables from cable holders...
  • Page 30 - Apply screw at standoff ! Attention: Use allen key with bald end ! Attention: Do not scratch the lens parts 2.5mm - BeoLab 20 - seen from top - indicating cable placement - BeoLab 20 in service position 2...

  • Page 31: Replace Pcb02.1, Input Panel

    Replacement of modules Replace PCB02.1, Input Panel + 4.2 BeoLab 20 in service position 1 + 4.5 BeoLab 20 in service position 2 Cable holders - Release cables from cable holders - Remove screws and cable holders 10 mm TX10...
  • Page 32 Replacement of modules - Remove screws 12 mm TX10 - Remove screws - Remove lid 10 mm TX10 - Disconnect cables 02.1P102 02.1P101 02.1P103 - Remove screw ! Attetion: Note shape of screw 10 mm TX10...
  • Page 33 Replacement of modules - Remove screws 10 mm TX10 - Remove ground plate - Remove screws 10 mm - Remove PCB02.1, Input Panel...

  • Page 34: Replace Pcb02.2, Connector Interface

    4.10 Replacement of modules Replace PCB02.2, Connector Interface + 4.2 BeoLab 20 in service position 1 - Remove screws 10 mm TX10 - Lift PCB02.2, Connector Interface - Disconnect cable - Replace PCB02.2, Connector Interface 02.2P1...

  • Page 35: Replace Pcb04, Power Supply

    Replacement of modules 4.11 Replace PCB04, Power Supply + 4.2 BeoLab 20 in service position 1 + 4.5 BeoLab 20 in service position 2 - Remove screw ! Attention: lock washer 8 mm TX20 - Remove screw and cable holder...
  • Page 36 4.12 Replacement of modules Disconnect cables ! Attention locking device on 04P14 04P13 04P14 04P15 04P17 - Remove standoffs - Remove PCB04, Power Supply ! Attention PCB04 and components when removing from guide pins...

  • Page 37: Replace Pcb30, Digital Sound Engine

    Replacement of modules 4.13 Replace PCB30, Digital Sound Engine + 4.2 BeoLab 20 in service position 1 + 4.5 BeoLab 20 in service position 2 30P3 30P2 - Disconnect cables 30P1 ! Attention locking device on 30P1, 30P2 and 30P3...
  • Page 38 4.14 Replacement of modules - Remove screws - Remove standoffs TX10 - Turn PCB30 buttom side up - Remove standoffs - Turn PCB30 buttom side down - Gently pull off PCB89, Wireless Power Link Rx - Move gap pad to new PCB30, Digital Sound Engine...

  • Page 39: Replace Pcb35.1, Amplifier (Tweeter, Midrange)

    Replacement of modules 4.15 Replace PCB35.1, Amplifier (Tweeter, Midrange) + 4.2 BeoLab 20 in service position 1 + 4.5 BeoLab 20 in service position 2 35.2P2 - Disconnect cables 35.1P3 35.1P2 35.1P1 - Gently turn heat sink 90° counter-clock-wise - Remove screws...

  • Page 40: Replace Pcb35.2, Amplifier (Woofer)

    4.16 Replacement of modules Replace PCB35.2, Amplifier (Woofer) + 4.2 BeoLab 20 in service position 1 + 4.5 BeoLab 20 in service position 2 35.2P3 - Disconnect cables 35.2P2 35.2P1 35.1P3 - Gently turn heat sink 90° counter-clock-wise - Remove Screws...

  • Page 41: Replace Pcb47, Led Indicator

    Replacement of modules 4.17 Replace PCB47, LED Indicator + 4.2 BeoLab 20 in service position 1 + 4.23 Remove Tweeter - Remove screws ! Attention: gently lift felt to access two screws - Take out LED assembly 8 mm - Turn upside down...

  • Page 42: Replace Pcb48.1, Ntc (Tweeter)

    4.18 Replacement of modules Replace PCB48.1, NTC (Tweeter) + 4.2 BeoLab 20 in service position 1 + 4.23 Replace Tweeter - Turn tweeter assembly buttom side up - Peel off PCB48.1 NTC - Replace tape if damaged - Replace PCB48.1, NTC ! Attention: place new tape and new PCB48.1,...

  • Page 43: Replace Pcb48.2, Ntc (Midrange)

    Replacement of modules 4.19 Replace PCB48.2, NTC (Midrange) + 4.2 BeoLab 20 in service position 1 + 4.24 Remove Midrange - Remove screw - Replace PCB48.2, NTC TX10...

  • Page 44: Replace Pcb48.3, Ntc (Woofer)

    4.20 Replacement of modules Replace PCB48.3, NTC (Woofer) + 4.2 BeoLab 20 in service position 1 + 4.25 Remove Woofer - Remove screw - Replace PCB48.3, NTC TX10...

  • Page 45: Replace Pcb68, Switch Panel

    Replacement of modules 4.21 Replace PCB68, Switch Panel + 4.2 BeoLab 20 in service position 1 + 4.5 BeoLab 20 in service position 2 - Remove screws - Remove lid 16 mm TX10 - Lift PCB68, Switch Panel - Disconnect cable...

  • Page 46: Replace Pcb89, Wireless Power Link Rx

    4.22 Replacement of modules Replace PCB89, Wireless Power Link Rx + 4.2 BeoLab 20 in service position 1 + 4.5 BeoLab 20 in service position 2 + 4.13 Remove PCB30, Digital Sound Engine - Turn PCB89 buttom side up - Remove screws...

  • Page 47: Replace Tweeter

    Replacement of modules 4.23 Replace Tweeter + 4.2 BeoLab 20 in service position 1 - Turn tweeter assembly buttom side up - Remove screws 6 mm TX10 - Lift tweeter and turn bottom side down with PCB48.3, NTC towards plain surface...

  • Page 48: Replace Midrange

    4.24 Replacement of modules Replace Midrange + 4.2 BeoLab 20 in service position 1 - Remove screws TX20 - Gently pull out the midrange - Disconnect cables 48.2P1 – - Remove screw - Remove PCB48.2, NTC to new midrange - Replace Midrange...

  • Page 49: Replace Woofer

    Replacement of modules 4.25 Replace Woofer + 4.2 BeoLab 20 in service position 1 - Remove screws TX20 - Gently pull out the woofer - Disconnect cables 48.3P1 – – - Remove screw - Remove PCB48.3, NTC to new woofer...
  • Page 50 4.26...

  • Page 51: Specification Guidelines For Service Use

    Specification guidelines for service use Specification guidelines for service use BeoLab 20 Type survey Market Variant Type number Albania, Andorra, Argentina, Austria, Azerbaijan, Bahrain, Belgium, Botswana, Brazil, Bulgaria, Chile, Côte d’Ivory, Croatia, Czech Republic, Denmark, Egypt, Faroe Islands, Finland, France, Georgia, Germany,...
  • Page 52 Specification guidelines for service use Features Adaptive Bass Linearisation (ABL) Room adaptation: Free, wall or Corner position Thermal protection Line sense - auto On/Off Wireless Power Link Wireless Technology WiSA™ 5 GHz Connections 2 × Power Link (RJ45) 1 × RCA (L/R) 1 ×...
  • Page 53 Specification guidelines for service use Connections MAINS INLET C8 socket To see the different types of mains leads, see exploded view in the retail ordering system POWER LINK (× 2) RJ45 socket Pin 1 Not used Pin 2 PL_Data Data GND Pin 3 Signal GND (chassis)

  • Page 55: Block Diagram

    Block diagram Block diagram Block diagram TOSLINK TOSLINK Power Link Power Link Service R - INPUT - L Tweeter (ATI) PCB02.1, Input Panel PCB68 Switch Panel P101 P102 AMP_EN_N PCB48.1 PCB30, Digital Sound Engine DC_ERR_N 3V3_SB NTC1 PCB47 PCB89, LRCLK Wireless Indicator ADC_MUX...

  • Page 57: Wiring Diagram

    Wiring diagram Wiring diagram Wiring diagram Midrange GNDA 8/8pins 8/8pins NTC2 > LED_RED 02.1 P103 < NTC1 48.2 > LED_GREEN >< >< S1_BUTTON S1_BUTTON W2 1/3 >< >< S2_LEFT S2_LEFT Input Panel 2/2pins 3/3pins >< >< LED Indicator S2_RIGHT S2_RIGHT ><...
  • Page 58 Available parts Available parts Available parts BeoLab 20 9001 See Heat sink Incl. pos. no. 9014, 9018, 9031, 7 9002 9013 9018 9012 9014 9018 9003 9018 02.2 9004 9018 9005 9015 9006 9007 9018 48.2 9018 9016 9017 9008...

  • Page 59: Available Parts

    Available parts BeoLab 20 9001 3131491 Lens, top 9002 3131492 Lens, body 9003 3458358 Lens, inner 9004 3458376 Led bracket 9005 6150044 Light guide 9006 3912161 Felt 9007 3131493 Decoration ring 9008 3131494 Cover plate 9009 3947303 Gasket 9010 8480542 Tweeter, incl. pos. no. 9011 and PCB48.1...
  • Page 60 Available parts Heat sink Incl. pos. no. 9031, 9032, 9040, 15, 16, 17, 18 9030 9031 9031 9031 9033 9032 9034 See Digital Sound Engine 9031 9040 See Connector Panel...
  • Page 61 Available parts Heat sink 9030 3358601 Heat sink incl. pos. no. 9031, 9032, 9040, 15, 16, 17, 18 9031 3947305 Set of gaskets 9032 3151552 Clips 9033 3160836 Shielding 9034 3160838 Shielding 9040 3948141 Set of gaskets 04Module 8007871 PCB04, Power Supply Screws etc.
  • Page 62 Available parts Connector panel 9040 9040 9041* *Remember to order pos. no. 9040 – 9040 Set of gaskets 9042* 02.1* 9043* 9044 9040 9045* 9040 35.1 9046* 9040 35.2...
  • Page 63 Available parts Connector panel 9040 3948141 Set of gaskets 9041* 3458370 Connector panel 9042* 3458366 Connector board 9043* 2815067 Grounding plate 9044 3358592 Heat sink *Remember to order 9045* 3458364 Lid pos. no. 9040 - Set of gaskets 9046* 3458368 Lid 02.1Module 8007872 PCB02.1, Input Panel 35.1Module 8007783 PCB35.1, Amplifier 35.2Module 8007783 PCB35.2, Amplifier...
  • Page 64 Available parts Digital Sound Engine 9050 9051 9052 9053 9050 3376536 Holder 9051 3358594 Cooling plate 9052 3110104 Holder 9053 3440251 Sealing 30Module 8007865 PCB30, Digital Sound Engine 89Module 8007804 PCB89, Wireless Power Link Rx Screws etc. 2038137 Screw 3 x 6mm 7530119 Cable holder 2934126 Standoff 2934173 Standoff...
  • Page 65 Available parts Wire bundles 6278948 Wire, mains inlet 6278953 Wire, DSE See page 6.3 6200559 Wire bundle 6278949 Wire, 8 pole 6278952 Wire, DSE-AMP 6278950 Wire, PSU-AMP 6278950 Wire, PSU-AMP 6278874 Wire, AMP-SPK 6278954 Wire, INT-LED/NTC Parts not shown 3376562 Product cover 3040117 Peeler 3376577 Stocking Back-up suitcase...
  • Page 68 Bang & Olufsen DK-7600 Struer Denmark 3538228 14-04...

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