7 - Beomanuals.com
Contents
1. 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 cable AUS 6100386 Mains cable KOR 6100331 Mains cable JP 6100047 Mains cable CHN 9006 3340293 Gasket 9007 3454102 Bottom incl pos no 9006 9008 3390066 Bag w parts 9009 3358148 Heat zink 9010 3340291 Gasket 9011 3131096 Housing 9012 3340290 Gasket 9013 3458134 Port 9014 3340292 Gasket 1Modu 8002619 PCB1 Amplifier 2Modu 8002620 PCB2 SMPS 3Modu 8002621 PCB3 Filter 4Modu 8002622 PCB4 LED 5Modu 8002623 PCB5 Switch 6Modu 8002624 PCB6 Input 1 2011006 Screw 4x 10mm 2 2011008 Screw 4x 10mm 3 2011009 Screw 3 x 8mm 4 2011013 Screw 2 6 x 8mm 5 2011012 Screw 2 6 x 8mm 6 2011011 Screw 3 x 6mm 7 2011010 Screw 3 x 6mm 6277995 Wire f speakers 3395297 3375491 6270250 6270273 3375590 Back up suitcase Product cover Cable mini jack stereo Cable RCA mini jack Autosol chrom polishing 3392894 Packing complete See Retail Ordering System 8 3 Available parts BANG amp OLUFSEN Floor Stand 2178 1217811 m 9101 Incl pos nos 9102 1 oe 28 28 8 e 9102 e 9103 CD 9104 9101 3932011 Tube incl pos nos 912. BANG amp OLUFSEN Adjustments 3 1 Adjustments Adjustments after replacing PCB3 or PCB5 Read out the adjustment position of the old potentiometers VR601 amp VR701 and set the new potentiometers to the same position PCB3 VR601 O VR601 PI pe 5 VR701 4 1 Repair tips BANG amp OLUFSEN 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 ohm meter tweeter 5 70 1096 woofer 6 70 31096 Power Link E A m MK III ARR BANG amp OLUFSEN Disassembly 5 1 Remove front cover Pull off front covers 5 2 Remove woofer BANG amp OLUFSEN Remove cables Pull off front cover Remove screws TX20 Remove cables Do not pull release lock Cables a c CM BANG amp OLUFSEN Remove tweeter 5 3 Remove cables Pull off front cover Remove screws Remove cables Do not pull release lock 5 4 Replace cabinet BANG amp OLUFSEN t 5 1 Remove front cover t 5 2 Remove woofer 5
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4. 02 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 2178 3507662 Guide f cable manager BANG amp OLUFSEN Available parts 8 4 Packing Floor Stand 9301 9302 9303 9301 9301 3396330 Foam packing set 9302 3016012 Guide f cover plate 9303 3392486 Outer carton 8 5 Available parts BANG amp OLUFSEN Ceiling bracket 2177 1217711 Wall bracket 2179 1217911 3507401 Guide 3507403 Guide Bang amp Olufsen DK 7600 Struer Denmark Phone 45 96 84 11 22 Fax 45 97 85 39 11 3538032 12 06 A
5. 3 Remove tweeter Remove plug ESD Remove screws Pull off cabinet Note that this may reguire some effort Remove plug Remember to transfer label to new cabinet BANG amp OLUFSEN Replace port 5 5 te 54 Remove cabinet Remove screws Lift off port as shown 5 6 Replace PCB1 Amplifier BANG amp OLUFSEN t 5 4 Remove cabinet rs 5 5 Remove port Remove screws ESD Gently pull off bracket with PCB1 mounted Remove screws and pull off PCB1 BANG amp OLUFSEN Replace PCB2 SMPS te 54 Remove cabinet Remove plugs ESD Remove screws Pull off PCB2 hom Eu mn 5 5 8 Replace PCB3 Filter BANG amp OLUFSEN 5 4 Remove cabinet Remove plugs Remove screws Gently pull off PCB1 and PCB3 Pull off PCB1 BANG amp OLUFSEN Replace PCB5 Switch 5 9 54 Remove cabinet 5 5 Remove port te 58 Remove PCB3 Filter Remove screws Pull off as shown Be aware of the cables ESD Remove plugs no v 5P602 5P603 Remove
6. 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 BANG amp OLUFSEN CONTENTS Survey OT modules coti see a 1 1 HONTO SENICE Lan M O an kana 1 2 Warnings Insulating test 2 1 a RR ee S 3 1 5 c UTE 4 1 DisasseM DIY rn ata an s DIS Ng 5 1 Specification guidelines for service use 6 1 BIOCK diagram are ee E O RR DD ee 7 WINING Te 7 2 Available parts t CE 8 1 BANG amp OLUFSEN Survey of modules 1 1 Survey of modules PCB1 PCB2 PCB3 PCB4 PCB5 PCB6 Amplifier SMPS Filter LED Switch Input 1 2 How to service BANG amp OLUFSEN How to service Front line service Back up suitcase Delivery Installation and setting up Fault Finding 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 customer BeoLab 4 has been split up into as few service items as possible Each service friendly item is packed individually prepared for worldwide transport and has a separate seven digit spar
7. HOGL zHvOL 7 18 aa E 19373S INdNI INANI 1 ES 3 E D UB Td TO 7 nd no E any 8 4 7 2 995 zHg9ss Morii D xus orou LOOHA x H 24 og 38v 299 2 2919 1 ZHOG YT H T 203 apoz E 7IVNINN 15 NIVO vi i Ly 3300 N N bh Pi ie dv yozou 391 zHOGL E 1e r1u029441q us aaam LSNPOV NIVO N3133AL H3133ML z HALINIT zur nodes 011931044 Si H3133ML LOLUA YO LHK AS ANV LS EN as EEE ee es a EEE E LA a EM PI een Block diagram 7 2 Wiring diagram BANG amp OLUFSEN Wiring diagram 42v18 aaa en NOLSVJ H3 dS gt ASSV 0402 big ania MOTISA C 63LY Q3 ASSY 0902 SS E aa amp ano axi am dv JM BISAM 8 Iw as aoL non 9 m zw gt m ano 7 5 gt jd a GO 8 esu 2 Ww lol 8 8
8. e part number to be found in the Bang amp Olufsen Retail System or the Service Manual The exploded view drawing will show the service spare parts A back up suitcase contains all necessary electrical modules for front line repair of one loudspeaker Cabinet parts must be ordered separately in the Retail System or directly from B amp O Struer DK The replaced modules must be returned for repair at Bang amp Olufsen Module Repair Department Use the Module Repair form or the form in the Retail Order System Exchange Module As there is only one type number for BeoLab 4 the product can be used for all markets with 100 to 240 Vac mains voltage When you order BeoLab 4 set of two this includes two mains cables two Power Link cables and two boxes with the three front covers in the chosen colour This means that the delivery will consist of four boxes This setup allows our packaging department to pack the specific order for the customer no matter which country it goes to or the colour chosen Only the switch for loudspeaker placement and the switch for Left or Right Line or PC must be set into correct position as described in the User Guide before Power Link Line signal and AC power wires are connected If the Power Link is used the switch is for Left or Right setting If Line connection is used via mini jack plug the switch is for Line 0 to 1V or PC line 0 to 2V setting See more details in the User Guide The automatic switch off circ
9. er soft for service black can be ordered for transport of BeoLab 4 2 1 Warnings Insulating test BANG amp OLUFSEN Warnings ESD Handling Insulation test STATIC ELECTRICITY MAY DESTROY THE Propucr When electrical replacements or disassembly is taking place use an ESD mat The internal electronics are very sensitive to static electricity 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 Cleaning of the speaker surfaces should only be done with a lint free cloth which you have dipped in lukewarm water and wrung firmly The product must be insulation tested after having been dismantled Make the test when the set has been reassembled and is ready to be returned to the customer Flashover must not occur during the test Make the insulation test as follows Short circuit the two pins of the mains plug and connect them to one of the terminals of the insulation tester Connect the other terminal to ground on the Power Link socket NOTE To avoid damaging the product it is essential that both terminals of the insulation tester have good contact During the test the current must not exceed 5 MA Slowly increase the voltage on the insulation tester until a voltage of 2 5 kV ac is obtained Maintain the voltage level for one second then slowly decrease the voltage to 0 V ac
10. r Link 25 mV 88 dB SPL Input sensitivity line 25 mV 88 dB SPL Auto switch on Switch off time line 3 min Indicator LED for on green or off red Operation Free Wall or Corner position Left Right or LINE PC switch Protection Thermal protection of tweeter and SMPS Power Link use semi balanced PL cable type MK III or fully mounted PL cable Mini jack line in Via mini jack plug 0 1 V Line automatic on off or 0 2 V PC always on selected by switch Accessories Ceiling bracket type 2177 217711 a pair Floor stand type 2178 217811 a pair Wall bracket type 2179 217911 a pair Cable mini jack stereo to 2 x mini jack mono L and R 2 5 m 6270250 black Cable RCA mini jack mono 5 m black 6270273 a pair Power Link splitter one male to two female PL plugs 6270706 Subject to change without notice BANG amp OLUFSEN Block diagram 7 1 amd SdWs NI Ov i N I lt 6 is 2 N E lt o lt _ DEE a ER ere DC HILIMS LNGNI a yovr NIG OLO end _ 4o mara yead yoiou yorou 5 O O Z
11. screws 5 10 Replace PCB6 Input BANG amp OLUFSEN te 5 4 Remove cabinet rs 5 5 Remove port 58 Remove PCB3 Filter 5 9 Remove PCB5 Switch Remove screw ESD d 9 a 4 _ ESD Mat 13 Remove bracket BANG amp OLUFSEN Replace bottom plate 5 11 te 54 5 5 we 5 7 tw 58 tw 59 Remove cabinet Remove port Remove PCB2 SMPS Remove PCB3 Filter Remove PCB5 Switch 5 10 Remove PCB6 Input Remember to transfer label BANG amp OLUFSEN BANG amp OLUFSEN Specification guidelines for service use 6 1 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 35 W Class D ICEpower Power amplifier treble 35 W Class D ICEpower Effective Frequency range 50 20 000 Hz Crossover frequency 3 3 kHz Cabinet principle Bass reflex Net volume bass 55 litres Magnetically shielded No Woofer 01 6 mm 4 concave diaphragm 6 70 10 Tweeter 9 mm 34 fabric dome 5 70 10 Bass equalization ABL Adaptive Bass Linearization Input sensitivity Powe
12. uit is only active with the switch in Line position and is not active with the switch in PC line position The LED will indicate on green or off red only Before troubleshooting is initiated let the customer demonstrate the fault if possible There are four electrical modules in the product and furthermore two additional modules One with a LED and one with a mini jack socket Therefore a faulty module is easy to point out in most cases The PCB has been divided into the functionality Inputs Amplifier Power supply and Filter No special service programs are available in this product or via the ServiceTool If there is a fault in the SMPS PCB2 or Amplifier PCB1 the LED is typically off Only the tweeter unit is protected by a circuit that measures the resistance in the coil and will automatically turn down the signal level for the tweeter shortly if it is too high for a period BANG amp OLUFSEN How toservice 1 3 Replacement Mechanics 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 unit All cabinet parts as e g the socket panel can be changed on site All surfaces can be cleaned with a mild detergent Internal parts are supplied as service kits e g the loudspeakers PCB s etc A product cov
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