Bang & Olufsen BeoLab 5 6881 User manual

BeoLab 5
Type 6881, 6882, 6883, 6884, 6885, 6886, 6887, 6888
From serial no. 19375256
Service Center repair guide
English

How to service
Front line service
BeoLab 5 must be serviced in the customers home in terms of electrical symptoms
or exhange of mechanical parts such as cloth frame, microphone or foot. In this
way you avoid having to transport the heavy loudspeaker (967mm/Ø485mm,61kg)
from and back to the customer. For front line service we offer a back-up suitcase.
All needed electrical parts are found in the back-up suitcase (beside the transformer
and lower woofer). Mechanical parts (cloth frame, foot, cabinet or alu. plates)
must be ordered separately.
Service documentation
Service documentation for the BeoLab 5 will be a “Service Center repair guide” with
part no. for the back-up suitcase, electrical and mechanical parts, User’s guides etc.
Converting mains voltage supply
If it is necessary to change voltage supply, e.g. when moving between two countries,
it is necessary to order new mains transformer and a jumper on the ICEsystem 1
PCB6 (J200 = 220-240Vac, J201 = 100-120Vac). For US/JPN the fuse F10/11 on
the mains lter PCB1 must be changed from T5A to T10A also.
E.g.: Moving from EU (type 6881) to Japan (type 6884) with a pair of BeoLab 5,
order two mains transformers for type 6884, and move the jumper on the
ICEsystem 1 PCB6 from J200 to J201 to adapt both speakers to the 100Vac mains
voltage.
Type survey
Variants Type Transformer Jumper Mains cable Fuse F10/11
J200/J201 on PCB1
on PCB6
EU 6881 8013627 J200 mount. 6100440 6600177 (T5A)
I 6888 8013627 J200 mount. 6100441 6600177 (T5A)
CH 6887 8013627 J200 mount. 6100442 6600177 (T5A)
GB 6882 8013627 J200 mount. 6100443 6600177 (T5A)
US 6883 8013629 J201 mount. 6100444 6600176 (T10A)
JPN 6884 8013628 J201 mount. 6100445 6600176 (T10A)
AUS 6885 8013630 J200 mount. 6100446 6600177 (T5A)
KOR 6886 8013627 J200 mount. 6100447 6600177 (T5A)
How to service, English 1.1

1.2 Warnings – PIN code protection, English
STATIC ELECTRICITY
MAY DESTROY THE
PRODUCT
Warnings
ESD
When electrical replacements or disassembly is taking place, use a ESD-mat.
The internal electronic are very sensitive to static electricity.
General warnings
Wear cutton cloves to avoid any ngerprints on the product.
The aluminium surfaces on the product is very sensitive, so handling should be
done with great care to avoid damage.
The mechanical limit for the driver is easily reached when the vacuum tightness in
BeoLab 5 is broken.
PIN code protection
The PIN code protection system will be introduced in autumn 2003.
This will be the known PIN code system, which are used in others products. The
system will be mentioned in the user guide when introduced. Like on other
products you will be able to use the service master code, when service is
performed (11111).
PIN code protection is introduced from serial number : _________________

Specification guidelines for service use BeoLab 5
Type no. 6881 Europe - 230V6881 Europe - 230V
Type no. 6882 England - 230V6882 England - 230V
Type no. 6883 USA, Canada - 120V6883 USA, Canada - 120V
Type no. 6884 Japan - 100V6884 Japan - 100V
Type no. 6885 Australia - 240V6885 Australia - 240V
Type no. 6886 Korea- 220V6886 Korea- 220V
Type no. 6887 Switzerland - 230V
Type no. 6888 Italy - 230V6888 Italy - 230V
Dimensions Height - 967mm
Ø - 485mm
Weight - 61kg
Box for one loudspeaker Height - 1300mm
Width - 600mm
Length - 600mm
Cabinet finish Aluminium and black cloth
Cabinet volume Upper bass - 5 litres
Lower bass - 29 litresLower bass - 29 litres
Power Consumption typical 15 W
Stand-by >0.5 W
Maximum Sound Pressure Level 108 dB
Power amplifiers 4
Long term maximum, output power per amplifier Lower bass : 1000 watts
Upper bass : 1000 watts
Midrange : 250 wattsMidrange : 250 watts
Tweeter : 250 watts
Effective Frequency Range 20 – 20,000 Hz
Crossover frequency 120/600/2000 Hz
Cabinet principle Closed box
Magnetically shielded No
Lower woofer 381mm - 15”
Upper woofer 165mm - 6.5”
Midrange 76mm - 3”
Tweeter 19mm - ¾”
Directivity control treble and midrange *Acoustic Lens Technology
Bass equalisation ABC (Adaptive Bass Control)
Connections 2×Powerlink
Phono (Line)
**2×Digital IEC 60958
Volume adjustment Built-in
*ALT (or Acoustic Lens Technology) is licensed from Sausalito Works LLC.
**32/44.1/48/88.2/96 K
Subject to change without notice
Specification guidelines for service use 2.1 2.1 2.1

3.1 Overall block diagramOverall block diagram 3.13.1
Overall block diagram

3.2 Wiring diagramWiring diagram 3.2 3.2
Wiring diagram

4.1 Available partsAvailable parts 4.14.1
Available parts
Lens
9001
8
10
9005
9006
9007
9009
9010
9008
9011
10
9012
9013
9014
9015
9016
9019
9017
9018
9004
9003
9002 1
1
2
2
33
3
3
3
3
4
2
2
2
2
6
7
5
4
3
3
3
3
8
88
8
88
5
7
6
8
Incl. pos. nos. 3, 9005, 9006
Incl. pos. nos. 3, 5,
6, 7, 9009, 9010
Incl. pos. nos. 3, 5, 6, 7

4.2 Available partsAvailable parts 4.2 4.2
Lens 9001 3459436 Topplate, complete
9002 3460017 Holder
9003 6150038 Lens f/Indicator
9004 3452736 Lens f/TW incl. pos. nos. 3, 9005, 9006
9005 3947806 Felt f/TW, large
9006 3947807 Felt f/TW, small
9007 8480373 Tweeter - 19mm, 3/4”
9008 3452737 Aluminiumplate f/TW incl. pos. nos. 3, 5, 6, 7, 9009, 9010
9009 3947808 Felt f/MR, large
9010 3947809 Felt f/MR, small
9011 8480374 Midrange - 76mm, 3”
9012 3332096 Damping material
9013 3332098 Damping material, base
9014 3332101 Damping material, MR
9015 3452738 Aluminiumplate f/MR incl. pos. nos. 3, 5, 6, 7
9016 3459437 Topcover
9017 3452739 Tube w/flange incl. pos. no. 9018
9018 6150036 Lens f/IR
9019 3332099 Damping material
8Module 8100089 PCB8, Indicator
10Module 8100090 PCB10, NTC
Survey of screws etc. 1 2013263 Screw 3 x 7mm
2 2013257 Screw 5 x 50mm
3 3947350 Tape, roll 3 x 7mm
4 2038096 Screw 3 x 5mm
5 2013255 Screw 3 x 10mm
6 2816298 Ground spring
7 7530138 Plug
8 2058063 Screw 5 x 25mm

4.3 Available partsAvailable parts 4.34.3
Speakers
9026
9025
9027
9028
9029
9030
9031
9032
9033
9034
9035
9037
9038
9039
9040
9041
9042
9043
9036
10
7
999
10
10
10
10
10
9
11
11
11
11
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
88
8
8
8
8
8
8
9
8
8
12
12 12
12
12
12
12
12 12
12
13
13
13
13
13
13
14 14
16
16
15
15
15
15
8

Speakers
9025
3320719
Cloth frame
9026
8013627
Transformer, EU, KOR
8013628
Transformer, JPN
8013629
Transformer, US
8013630
Transformer, AUS
9027
3340246
Gasket, set
9028
3332094
Damping material, back
9029
3332095
Damping material, side
9030
3332097
Damping material, ring
9031
8480376
Woofer - 165mm, 6”
9032
3332095
Damping material, side
9033
3400303
Loudspeaker cabinet, incl. tape
9034
3160307
Cover f/plug connections
9035
3151722
Cover f/RS232 plug
9036
2816381
Hook f/cloth frame
9037
6100440
Mains cable, EU
6100443
Mains cable, GB
6100444
Mains cable, US
6100445
Mains cable, JPN
6100446
Mains cable, AUS
6100447
Mains cable, KOR
6100441
Mains cable, I
6100442
Mains cable, CH
9038
3151552
Wire holder
9039
8480375
Woofer - 381mm, 15”
9040
3340246
Gasket, set
9041
8470042
Microphone unit
9042
2752098
Foot
9043
3103417
Foot, soft
7Module
8100091
PCB7, Sensitouch & IR
10Module
8100090
PCB10, NTC
999Module
8052224 Main chassis with PIN code protection
1F10/11
6600177
Fuse (T5A)
6600176
Fuse (T10A)
6J200
6000096
Jumper
6J201
6000096
Jumper
Survey of screws
8
2058063
Screw 5 x 25mm
9
2056008
Screw 3.5 x 10mm
10
2015177
Screw 3.5 x 14mm
11
2054022
Screw 3 x 8mm
12
2042054
Screw 4 x 12mm
13
2015180
Screw 4 x 12mm
14
2015174
Screw 4 x 14mm
15
2038118
Screw 3 x 6mm
16
2072127
Center screw
Available parts 4.4

Wire bundles
See wiring diagram page 3.2.
The part no. is printed on the diagram above the wire bundle, as shown.
Parts not shown
3395224
Back-up suitcase with PIN code protection
3375007
Product cover
3624521
Service bracket
3624161
Service holder f/topcover pos. no. 9016
6270900
Dig. cable w/ferrite, black, 5m
6270775
Line cable, black, 5m
6270901
Sync. cable, 10m
6270688
Power Link cable, black, 5m
3629144
Special tool f/topcover
3040001
Torx key
3132288
Brush
3390586
Cable cover set
4.5 Available parts
Available documentation
Guides, see Retail Ordering System

Available parts 4.6
Packing
9301
9302
9303
9304
9305
9302
9306
9307
9301 3392766 Outer carton, top
9302 3396196 Foam packing, set of top and bottom
9303 3392074 Distance pipe - order 4pcs.
9304 3392772 Outer carton, side
9305 3392772 Outer carton, side
9306 3392766 Outer carton, bottom
9307 3392685 Wooden pallet, EU
3392768 Wooden pallet, AUS
3917105 Foam foil

4.7

The main chassis in the back-up suitcase, is setup as a EU version. If it should be
used in a JPN or US product, it will need to be converted. See page 6.4.
Service tips
Symptom:
The loudspeaker does not switch on, and the stand-by diode is always red.
Cause:
The amplier is in protection-mode. The cause can be to high a load due to for
instance a disconnected/broken loudspeaker unit or NTC-PCB. The cause can also
be an internal fault in the main chassis.
Solution:
Check the load from the unit (b.m.o. an Ohm-meter) and replace the loudspeaker
unit, NTC-PCB or main chassis by using the back-up suitcase which contains all
necessary parts for On-site service. (Does not contain lower woofer or transformer).
Bring the main chassis into service position, and mount the complete lens again,
this way you can check the connection all the way through the lens. When the
chassis is in service position disconnect P3 on PCB6. On this plug you will be able
to check the tweeter and midrange unit, with a digital multimeter.
Service tips, English 5.1
Between red and orange there should be 5.7 ohm (midrange)
Between green and yellow there should be 3.0 ohm (tweeter)
The LB and UB can be measured directly on the units, after disconnecting the plugs.
The LB should measure 3.1 ohm
The UB should measure 5.0 ohm
All four NTC resistors should measure 470Kohm.
Note!
A thermal overload shuts down the BeoLab 5. Disconnect the mains for a few
seconds to reset BeoLab 5.

Service tool
To service BeoLab 5 a LabTop with the Bang & Olufsen service tool application is
needed. With the “Service Tool” it is possible to read error codes, service counters
and product ID and to save them in a le. (The service tool is downloaded from
the Retail System).
It is also possible to read data from the EEPROM and write data to the EEPROM.
This is necessary when a driver unit or a EEPROM has to be replaced. Test functions
and software update are also possible.
Replacement of driver
If it should be necessary to replace one of the driver units there are several things
to be aware of. For service purposes each driver is measured separately and the
result of this measurement is stored in a server at Bang & Olufsen together with a
specic serial number for each driver.
A label is placed on the driver with its serial number. In BeoLab 5 the data
belonging to drivers are stored in a EEPROM, placed in a socket on the chassis. In
a repair situation it is necessary to be able to write the data - belonging to the
actually driver to the EEPROM. This is done with a LapTop with the Bang & Olufsen
Service Tool application.
All data for the drivers will be available in the Retail System.
The procedure:
Access the Retail System and download driver data for BeoLab 5. Data for all
existing drivers will be downloaded to the LapTop. This is done to be sure that the
technicians have access to the correct data.
When the technician has replaced a defective driver in BeoLab 5 he must check
the serial number of the new driver - written on a label, placed on the driver.
Connect the cable between the LapTop and BeoLab 5 and start the Service Tool
and access “BeoLab 5” in the menu.
Choose the function for writing to the EEPROM and key in the serial number. The
application will automatically nd the correct data for the actual driver. Press the
button for write and the data will be transferred to BeoLab 5. An extra label with
the serial number is supplied with the driver. This must be placed on the cabinet.
5.2 Service tool - Replacement of driver, English

Replacement of EEPROM
If the EEPROM is defect the data for all the drivers must be written into a new
EEPROM. The serial number for the drivers can be found on the drivers/cabinet.
The serial number refers to the data for the actually driver.
Procedure:
When the defect EEPROM is replaced the data of the drivers must be written to
the EEPROM via the service tool:
- Connect the cable between the LapTop and BeoLab 5 and start the Service Tool
and access “BeoLab 5” in the menu. Choose the function for writing to the
EEPROM and key in the serial numbers written on the labels. The application will
automatically nd the correct data for the actual drivers. Press the button for write
and the data will be transferred to BeoLab 5.
ABC calibration after repair:
When the EEPROM has been changed the actual ABC ltres are lost. This means
that it is necessary to let BeoLab 5 carry out the ABC calibration.
Replacement of the chassis
If the electronic chassis has a defect the complete chassis - except the EEPROM -
must be replaced. The EEPROM contains driver data and must be moved from the
defect chassis to the new one. If it is necessary to replace the EEPROM - for instance
because of lightning - the driver data must be read in.
Cleaning
Clean the loudspeaker surfaces using a lint-free cloth which you have wrung rmly
in lukewarm water. Never use a vacuum cleaner to clean the two domes. However,
the front speaker cloth may be cleaned with a vacuum cleaner with a brush nozzle,
and set to the lowest suction level.
Never use alcohol or other solvents to clean any parts of the loudspeaker.
Replacement of EEPROM/Chassis & Cleaning, English 5.3

6.1
Replace cloth frame
6x
Replace cloth frame
Special tool f/topcover
No. 3629144

3x
Torx key
3040001
1
2
3
4
5
6

6.2
6.3
10x
BeoLab 5 in service position
BeoLab 5 in service position
See page 6.1, Remove cloth frame
TX20
1
2
3
4

6.2
6.3
Replace main chassis
BeoLab 5 Replace main chassis
See page 6.1, Remove cloth frame
See page 6.2, BeoLab 5 in service position
1x
2x
4x
1
3
4
5
6
2x
TX25
2
Mounting new main chassis