Bang & Olufsen Beolab 4000 MKII 6642 Service Manual
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Bang & Olufsen Beolab 4000 MKII 6642 Service Manual

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BeoLab 4000 MKII
Type 6642, 6643, 6644, 6645, 6646, 6647, 6648
Service Manual
English
German, French, Italian, Spanish, Danish, Dutch and Japanese 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 4000 MKII 6642

  • Page 1 BeoLab 4000 MKII Type 6642, 6643, 6644, 6645, 6646, 6647, 6648 Service Manual English German, French, Italian, Spanish, Danish, Dutch and Japanese 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 Warnings – Insulation test ............2.1 Adjustments ................3.1 Repaie tips ................4.1 Replacement of modules ............5.1 Specification guidelines for service use ........6.1 Block diagram ................7.1 Wiring diagram .................

  • Page 3: Survey Of Modules

    Survey of modules Survey of modules PCB01 Amplifier PCB02 SMPS PCB03 Main PCB PCB04...

  • Page 4: How To Service

    How to service How to service Front line service BeoLab 4000 MKII is to be serviced in the customer’s home when it comes to electrical symptoms or exchange of mechanical parts. In this way you avoid having to make more than one visit and using minimum of time on the case, all for the benefit of the customer.

  • Page 5: Warnings - Insulation Test

    Warnings – Insulation test Warnings When electrical replacement or disassembly is taking place, use an ESD-mat. The internal electronics are very sensitive to static electricity. ESD-Mat Handling Wear cotton gloves to avoid any fingerprints on the product. The surfaces on the product are very sensitive, so handling should be done with great care to avoid damage.

  • Page 6: Adjustments

    Adjustments Adjustments Adjustments after replacing PCB03, Main PCB Read out the adjustment position of the old potentiometers, R301 & R312, and set the new potentiometers to the same position. Adjustments of bass/treble levels Each loudspeaker is individually adjusted from production to ensure optimal stereo perspective. When replacing a speaker unit or PCB03, Main PCB, bass/treble levels have to be adjusted.

  • Page 7: Repaie Tips

    Repair tips Repair tips Hum in loudspeaker when no music is played The Power Link cable must be of type MK III or higher. The ground connection in Power Link cable lower than MK III may be insufficient for optimum sound performance. Power Link MK III Check loudspeaker units...

  • Page 9: Replacement Of Modules

    Replacement of modules Replacement of modules Modules that can be replaced BeoLab 4000 MKII in service position ......5.2 Replace PCB0, Amplifier .......... 5.4 Replace PCB02, SMPS ..........5.5 Replace PCB03, Main PCB ......... 5.6 Replace PCB04, LED ........... 5.7 Warning –...

  • Page 10: Beolab 4000 Mkii In Service Position

    BeoLab 4000 MKII in service position - Remove cables connected to BeoLab 4000 MKII LINE POWER LINK - Remove front frame - Remove profile TX10 - Remove screws for baffle TX10...
  • Page 11 BeoLab 4000 MKII in service position - Remove cables for speaker units...

  • Page 12: Replace Pcb0, Amplifier

    Replace PCB0, Amplifier + 5.2 BeoLab 4000 MKII in service position - Remove screws TX10 - Remove cables on backside of PCB 4P300 4P301...

  • Page 13: Replace Pcb02, Smps

    Replace PCB02, SMPS + 5.2 BeoLab 4000 MKII in service position - Remove cables - Remove screws and pull out PCB02, SMPS TX10...

  • Page 14: Replace Pcb03, Main Pcb

    Replace PCB03, Main PCB + 5.2 BeoLab 4000 MKII in service position - Remove screws and pull out PCB03, Main PCB - Remove ground cable! TX10 Ground - Remove cables 3P300 3P103 3P100...

  • Page 15: Replace Pcb04, Led

    Replace PCB04, LED + 5.2 BeoLab 4000 MKII in service position - Remove screw and pull out LED TX10 - Remove screws and pull PCB04, LED out TX10 - Remove screw and pull off light guide TX10...

  • Page 17: Specification Guidelines For Service Use

    Specification guidelines for service use Specification guidelines for service use BeoLab 4000 MKII Type 6642 (EU), 6643 (GB), 6644 (US), 6645 (J), 6646 (AUS), 6647 (KOR) 6648 (CN) Power supply: Voltage 100-240 Volt Power consumption Typical: 6 W, Standby: 0.5 W Cabinet finish Grey, black, dark grey, yellow, red/black, blue/black Front cloth...

  • Page 19: Block Diagram

    Block diagram – Wiring diagram Block diagram – Wiring diagram Block diagram PCB04, LED PCB01, Amplifier Tweeter amp. gain Autostart 20dB R302 H. P. F Tweeter H. P. F notch Protection notch 4 kHz 3200 Hz Limiter 3200 Hz 7 kHz Tweeter Differential Tweeter gain adjust...
  • Page 20 Available parts Available parts Available parts Baffle – left Baffle – right 9001 9014 9015 Incl. pos. nos. 9004, 9005 9002 9003 9104 9016 9003 Baffle 9101 9017 9018 9004 9102 9019 9102 9005 9020 9006 9103 Incl. pos. nos. 9004, 9005 9020 9007...

  • Page 21: Available Parts 8.2

    Available parts 8.2 BeoLab 4000 MKII 9001 3451181 Top/bottom, red 3451227 Top/bottom, blue 3451242 Top/bottom, dark grey 3456201 Top/bottom, aluminium 3456202 Top/bottom, black 3456205 Top/bottom, yellow 9002 3358346 Heat sink incl. pos. nos. 9004, 9005 9003 3947350 Foam tape, 10m 9004 3340136 Gasket 9005 3340090 Gasket 9006 3169054 Bracket incl. pos. nos. 9004, 9005 9007 3170226 Shield 9008 3152399 Holder f/PCB2 9009 3151432 Holder f/PCB1 9010 2576128...
  • Page 22 8.3 Available parts Mains cables 6100273 Mains cable, EU, 3m 6100329 Mains cable, UK, 3m 6100307 Mains cable, US, 3m 6100331 Mains cable, JP, 3m 6100332 Mains cable, AUS, 3m 6100386 Mains cable, KOR, 3m 6100047 Mains cable, China, 3m Packing 3397996 Set of foam 3392504 Outer carton Parts not shown 3658262 Product cover 3103325 Rubber foot 3040030 Allen key 6270041 Power Link cable MKIII, 5m, black Accessories 1203726 Base 6270856 Phono male to PL line-in, black, 5 m 6270433 Stereo mini-jack (male) to 2 x phono-female, black, 3m Available documentation See Retail Ordering System...
  • Page 23 Available parts 8.4 Floor Speaker Stand – type 2069 9201 9202 9203 9204 Incl. pos. no. 9210 9205 9210 9211 9201 3031707 Fitting 9202 2072119 Fixing screw 9203 2950216 Aluminium tube 9204 3459257 Cover plate 9205 2752081 Foot incl. pos. no. 9210 9210 3103392 Foot “soft” 9211 3103390 Foot “spike” 3390616 Bag w/parts (2 screws 4x12mm, 6 pcs. of pos. no. 9211 and 1 torx key 3504637 Setting-up guide...
  • Page 26 Bang & Olufsen DK-7600 Struer Denmark Phone +45 96 84 11 22* Fax +45 97 85 39 11 3538061 03-07...

This manual is also suitable for:

Beolab 4000 mkii 6643Beolab 4000 mkii 6644Beolab 4000 mkii 6645Beolab 4000 mkii 6646Beolab 4000 mkii 6647Beolab 4000 mkii 6648

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