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Bang & Olufsen BeoLab 4 Service Manual
Summary of BeoLab 4
Page 1
Beolab 4 type 6650, 6652 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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Contents survey of modules ...................................................................... 1.1 how to service ......................................................................... 1.2 warnings – insulating test ........................................................ 2.1 adjustments ........
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1.1 survey of modules pcb1 amplifier pcb2 smps pcb3 filter pcb4 led pcb5 switch pcb6 input survey of modules 4 5 6 1 2 3.
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How to service 1.2 how to service front line service beolab 4 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 custo...
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How to service 1.3 replacement replacement of a loudspeaker unit or the amplifier. Each loudspeaker is individually adjusted from production to secure optimal stereo perspective. If a defective loudspeaker unit must be replaced, it is easily done without adjustment due to the specifications of the uni...
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2.1 warnings – insulating test warnings esd when electrical replacements or disassembly is taking place, use an esd-mat. The internal electronics are very sensitive to static electricity. Handling wear cotton gloves to avoid any fingerprints on the product. The surfaces on the product are very sensit...
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Adjustments 3.1 adjustments adjustments after replacing pcb3 or pcb5 read out the adjustment position of the old potentiometers, vr601 & vr701, and set the new potentiometers to the same position. Pcb3 – vr601 pcb5 – vr701 vr601 vr701.
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4.1 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. The loudspeaker units can be checked by an ohm-meter (tweeter 5...
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Disassembly 5.1 - pull off front covers remove front cover.
Page 10: Esd
5.2 remove woofer 4x tx20 - remove screws - remove cables cables - pull off front cover - remove cables esd pcb xx esd-mat do not pull - release lock!.
Page 11: Esd
Remove tweeter 5.3 2x tx20 - remove screws - remove cables do not pull - release lock! Cables - pull off front cover - remove cables esd pcb xx esd-mat.
Page 12: Esd
5.4 replace cabinet 6x tx20 - remove plug - remove screws ☞ 5.1 remove front cover ☞ 5.2 remove woofer ☞ 5.3 remove tweeter - pull off cabinet - remove plug 1p301 3p612 esd pcb xx esd-mat - remember to transfer label to new cabinet! Note that this may require some effort.
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Replace port 5.5 - remove screws - lift off port as shown 2x ☞ 5.4 remove cabinet.
Page 14: Esd
5.6 replace pcb1, amplifier - gently pull off bracket with pcb1 mounted 2x - remove screws ☞ 5.4 remove cabinet ☞ 5.5 remove port - remove screws and pull off pcb1 4x esd pcb xx esd-mat.
Page 15: Esd
Replace pcb2, smps 5.7 - remove screws - remove plugs ☞ 5.4 remove cabinet - pull off pcb2 6x 2p1 2p2 esd pcb xx esd-mat.
Page 16: Esd
5.8 replace pcb3, filter - remove screws - remove plugs ☞ 5.4 remove cabinet - gently pull off pcb1 and pcb3 6x - pull off pcb1 3p606 2p2 3p610 esd pcb xx esd-mat.
Page 17: Esd
Replace pcb5, switch 5.9 - remove screws ☞ 5.4 remove cabinet ☞ 5.5 remove port ☞ 5.8 remove pcb3, filter - pull off as shown (be aware of the cables!) - remove plugs 4x 5p602 5p603 - remove screws 4x esd pcb xx esd-mat.
Page 18: Esd
5.10 replace pcb6, input - remove screw ☞ 5.4 remove cabinet ☞ 5.5 remove port ☞ 5.8 remove pcb3, filter - remove bracket 1x ☞ 5.9 remove pcb5, switch 1x esd pcb xx esd-mat.
Page 19
Replace bottom plate 5.11 - remember to transfer label ☞ 5.4 remove cabinet ☞ 5.5 remove port ☞ 5.7 remove pcb2, smps ☞ 5.9 remove pcb5, switch ☞ 5.8 remove pcb3, filter ☞ 5.10 remove pcb6, input.
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5.12.
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6.1 specification guidelines for service use specification guidelines for service use beolab 4 type 6650, 6652 dimensions w x h x d 19.7 x 20.5 x 21.5 cm weight 1.7 kg cabinet finish black, red, blue, dark grey power consumption typical: 7 w, stand-by: 0.5 w voltage 100-240 v power amplifier, bass 3...
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7.1 block diagram block diagram vr701 vr601.
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7.2 wiring diagram wiring diagram.
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8.1 available parts available parts beolab 4 9001 9002 9003 9004 9001 9006 9008 9007 9001 9009 9010 9011 9012 9013 9014 1 3 4 5 2 6 incl. Pos. No. 9006 9005 1 1 1 1 1 1 2 2 4 4 3 5 3 3 3 5 5 5 3 3 3 3 3 3 3 3 3 3 7 6 2.
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Available parts 8.2 beolab 4 9001 1604244 front cover, red 1604246 front cover, black 1604248 front cover, blue 1604249 front cover, dark grey 9002 3430049 cabinet 9003 8480048 tweeter 9004 8480049 woofer 9005 6100273 mains cable, eu 6100329 mains cable, uk 6100307 mains cable, us 6100332 mains cabl...
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8.3 available parts floor stand 2178 1217811 9101 9102 9103 9104 1 2 2 2 2 incl. Pos. Nos. 9102, 1 9101 3932011 tube incl. Pos. Nos. 9102, 1 9102 2369004 cable clip 9103 3162238 cover plate 9104 3103392 rubber foot 1 2046017 screw 6 x 16mm 2 3390078 bag w/parts 3390082 cable manager 3507402 guide f/...
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Available parts 8.4 packing – floor stand 9301 9301 9302 9303 9301 3396330 foam packing, set 9302 3016012 guide f/cover plate 9303 3392486 outer carton.
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8.5 available parts ceiling bracket 2177 1217711 3507401 guide wall bracket 2179 1217911 3507403 guide.
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Bang & olufsen dk-7600 struer denmark phone +45 96 84 11 22* fax +45 97 85 39 11 3538032 12-06 a.