Bang & Olufsen BeoLab 18 User manual

BeoLab 18
Type 6807, 6827, 6834 - 6839, 6847
Service Manual - version 1.2
English
132.6 132.4
13.5
15.5
20.0
20.0

CONTENTS
Survey of modules ................................................................... 1.1
How to service ......................................................................... 1.2
Troubleshooting - Fault ow chart ............................................ 2.1
Adjustments ............................................................................. 3.1
Replacement of modules .......................................................... 4.1
Specication guidelines for service use ..................................... 5.1
Block diagram .......................................................................... 6.1
Wiring diagram ........................................................................ 6.3
Available parts ......................................................................... 7.1
Change log:
Ver. 1.0 ................................................................. Original release
Ver. 1.1 ........................................................... Chapter 3 updated
Ver. 1.2 ...................................................... Available parts updated

Survey of modules 1.1
Survey of modules
Modules:
PCB2.1 Digital Connector
PCB2.2 Analogue Connector
PCB04 Power Supply
PCB30 Digital Sound Engine
PCB35 Amplier
PCB47 LED Indicator
PCB48 NTC Tweeter
PCB48 NTC Woofer
PCB89 Wireless Power Link Rx
Antenna:
82.1 Wireless Antenna
82.2 Wireless Antenna
82.3 Wireless Antenna
82.4 Wireless Antenna
Speaker units:
Tweeter
Woofer
82.4
82.2
04
2.1
30
89
82.1
82.3
47
48
48
35
2.2

1.2 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), which are supplied in the back-
up suitcase. 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. For this purpose, use the
the Exchange Module section in the Retail Order System. To help the Bang &
Olufsen Module Repair department it is very important to answer the following
questions:
1. Which software versions are used in the product?
2. What happens in the actual situation?
3. Error code, the error code contains data that may be used for repairing the
module(s) and must be returned with the defective module(s).
Handling the error code (error log).
a. Make a note of the error code/codes on the Exchange Module section and print it.
b. Use the error code when troubleshooting.
c. Return the error code in the Retail Order System.
d. Before returning the product to the customer, clear the error code (error log).
Preparations before service
Fault explanation and demonstration
Before troubleshooting is initiated, let the customer demonstrate the fault, if
possible.
Recommended tools for service
- Bang & Olufsen ServiceTool
- Static-protectiveeldservice
- White gloves
- Shoe covers
- Soft lint-free cloth for cleaning
- Wi-Spy (Wi-Spy DBx + Chanalyzer Pro)
- Product cover
Final check after repair
Thenalcheckafterrepairdescribestheactivitiesthatareneededtoensurethe
product will be returned in perfect condition to the customer.
Please refer to ‘Final check after repair’ section on page 3.6.

How to service 1.3
Warnings when handling
Static electricity
Static electricity may damage the product. The integrated circuits operates with
very low voltages, and that makes the product extremely sensetive to static
electricity.
Static-protectiveeldservicekit
Astatic-protectiveeld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.
Follow the instructions in the Service Manual and use the ESD-mat for both old
and new modules.
When mains voltage on the product is required, remove the connection between
the product and the ESD-mat. This is important to avoid getting injured by mains
voltage.
ESD
ESD-Mat
STATIC ELECTRICITY
MAY DESTROY THE
PRODUCT
Waste of Electrical and Electronic Equipment (WEEE)
Electrical and electronic equipment, parts and batteries marked with this symbol
must not be disposed of with normal household wastage; all electrical and
electronic equipment, parts and batteries must be collected and disposed of
separately.
Management methods for controlling pollution caused by Electronic Information Products
Component
name:
Hazardous substance
Pb Hg Cd Cr(VI) PBB PBDE
Aluminum parts ×ooooo
PCBA ×ooooo
Symbols used in the charts:
o Indicates all homogeneous materials’ hazardous substances content are below the
ST/T 11363–2006 MCV limit.
× Indicates that the hazardous substance content contained in any one of the
homogeneousmaterialsofthepartexceededtheMCVlimitsspeciedinthe
standard SJ/T 11363-2006.

1.4

Troubleshooting - Fault ow chart 2.1
Troubleshooting
LED indicator ................................................................................... 2.2
Description of LED indications .......................................................... 2.2
Product Information - Usage data .................................................... 2.3
Error Log ......................................................................................... 2.3
Speaker unit test .............................................................................. 2.4
NTC module test .............................................................................. 2.4
Sound test ....................................................................................... 2.5
Fault ow chart
No function and no LED indication ................................................... 2.6
LED indicator is ashing slowly orange ............................................. 2.7
LED indicator is ashing quickly orange ............................................ 2.8
No sound from speaker in a wired setup .......................................... 2.9
No sound from speaker in a wireless setup ..................................... 2.10
The signal for wireless connection is low ........................................ 2.11
Distorted sound from speaker ........................................................ 2.12
Survey of plugs and pins ................................................................ 2.13

2.2 Troubleshooting
Troubleshooting
LED indicator
The LED at the top of the speaker indicates the state of the product by changing
colour (red/orange/green), ashing or solid. If errors occur during operation, the
product will enter an error state and the LED will start ashing quickly orange.
Description of LED indications
- Green
Solid (10 seconds duration):
The product switches on.
Flashing slowly:
Software update is on-going.
Flashing quickly:
Associate mode (ready for pairing).
- Orange
Flashing slowly:
The product is close to overheating and will shut down temporarily. The product
will eventually revert to normal operation.
Flashing quickly:
The product is failing. The product will not revert to normal operation. In some
cases it can be resolved by disconnecting/connecting the mains.
This could be:
- NTC is defective or disconnected.
- Digital Sound Engine is overheating.
- Calibration failed or has not been done (ashing quickly orange/green).
- Red
Solid (10 seconds duration):
The product is connected to mains, the product is switching off or the product
restarts after a reset.

Troubleshooting 2.3
Product Information - Usage data
Usage data is logged in the product which can be very useful information in
troubleshooting situations. Use the ServiceTool to read out the usage data.
Error Log
If an error occurs in the product, it is recorded and saved in the error log. The error
log may be helpful in troubleshooting situations. Use the ServiceTool to read out
the error log.
Approach (ServiceTool)
Connect a service PC with ServiceTool. Follow the procedure below:
- Connect the ServiceTool to the SERVICE connector on the product as shown:
Use ServiceTool cable (see Available parts) together with Standard Ethernet cable.
- Run ServiceTool.
- Be sure that ServiceTool is updated to the latest version. If not, upgrade and restart
ServiceTool.
- Scroll down to BeoLab section.
- Select BeoLab 18 and click Launch.
- Click on the PRODUCT tab (if not already shown).
- Click + next to each item to expand the menus.
- Click System Info -> Product ID (the information screen appears).
- Click the Read button and conrm that product data is read out on the screen.
This indicates successful communication between the product and the service PC.
I/O

2.4 Troubleshooting
Speaker unit test
Measure the DC resistance of the speaker unit to determine if the fault is caused
by a defective speaker unit. It is recommended to measure on the terminals on the
speaker unit. The speaker units must be disconnected from the product.
Speaker unit Nominal value Limits
Tweeter 6.3 ohm 5.7 - 6.9 ohm
Woofer 11.2 ohm 10.0 - 12.5 ohm
If the speaker unit is outside the limits, it is defective and must be replaced.
Under normal conditions it is not necessary to replace the gaskets on the speaker
unit, unless they have been damaged by accident.
NTC module test
Measure the resistance of the NTC module to determine if the fault is caused by a
defective speaker unit or a defective NTC module.
It is recommended to measure on the terminals on the NTC module.
The NTC module must be disconnected from the product.
The resistance of the NTC module at 22ºC (72ºF) is approximately 470k ohm.
If the NTC module is not measuring approximately 470k ohm, it is defective and
must be replaced.

Troubleshooting 2.5
Sound test
It is possible to test each speaker unit/amplier to check the sound quality, and
determine whether the devices are faulty or healthy. For this purpose use ServiceTool
and refer to the test section.
The Sound Test section features a sound generator which allows the user to send
a pure sound directly to the speaker unit. This feature makes troubleshooting or
testing more easy and targeted.
- Run ServiceTool.
- Be sure that ServiceTool is updated to the latest version. If not, upgrade and restart
ServiceTool.
- Scroll down to BeoLab section.
- Select BeoLab 18 and click Launch.
- Click on the PRODUCT tab (if not already shown).
- Click + next to each item to expand the menus.
- Click Test -> Test Sound (the information screen appears).
- Follow the procedure in ServiceTool.
I/O

2.6 Fault ow chart
Fault symptom:
No function and no LED indication
Possible causes:
Defective PCB04, Power Supply
Defective PCB30, Digital Sound Engine
Defective PCB35, Amplier
Incorrect role switch setting
Conrm 5V_SB at
PCB04, P3 pin 6
OK?
No
Disconnect cable
W4 from PCB04 P3
Conrm 5V_SB at
PCB04, P3 pin 6
OK?
Conrm 3V at
PCB04, P3 pin 3
OK?
Is the speaker in a
wireless setup
Conrm that the
wired connection
between speaker
and the source
product is OK
OK?
Replace PCB35,
Amplier
Use ServiceTool to
calibrate the new
module
Conrm 28V at
PCB04, P4 pin 1,2
and -28V at PCB04,
P4 pin 7,8
OK?
Replace PCB30,
Digital Sound
Engine
OK?
Conrm that the
wireless connection
between the speaker
and the transmitter
is OK
OK?
Repair/setup the
wireless connection
Repair/replace
connection
Conrm mains
voltages at PCB04,
P1 pin 1-2
OK?
Replace PCB04,
Power Supply
Fault in cable
connection
Repair/replace
connection
Replace PCB30,
Digital Sound
Engine
Yes
Replace PCB04,
Power Supply
Disconnect W4 from PCB35, P3.
Conrm 28V at PCB04, P4 pin 1,2
and -28V at PCB04, P4 pin 7,8
OK?
Fault ow chart
Survey of plugs and pins - see page 2.13
Conrm that the
role switch setting
is correct
OK?
Conrm that the
role switch setting
is correct
OK?
Set role switch
Replace PCB35,
Amplier
Use ServiceTool to
calibrate the new
module
Set role switch

Fault ow chart 2.7
Fault symptom:
LED indicator is ashing slowly orange
(the product is close to overheating)
Possible causes:
Defective PCB30, Digital Sound Engine
Defective PCB35, Amplier
Defective PCB48, NTC Tweeter
Defective PCB48, NTC Woofer
Defective speaker unit
No
Yes
Survey of plugs and pins - see page 2.13
Disconnect product
from mains, wait 2
minutes and
reconnect to mains
OK?
Disconnect the product
from mains.
Disconnect PCB48, P1 on tweeter
and woofer and conrm 470kΩ at
PCB48, NTC P1 pin 1-2
OK?
Read out the
temperature of the
woofer
Seems normal?
Replace Defective
PCB48, NTC
Measure the DC
resistance of the woofer
(wires disconnected):
Woofer = 11.2Ω ± 1.2Ω
OK?
Read out the
temperature **
Seems normal?
Replace PCB35,
Amplier
Use ServiceTool to
calibrate the new
module
Replace the
suspected module
related to the high
temperature
Replace PCB30,
Digital Sound
Engine
Replace defective
woofer
Use ServiceTool to
calibrate the new
speaker unit
**
Board temperature - PCB30, Digital Sound Engine
Power Supply temperature - PCB04, Power Supply
Amplier temperature - PCB35, Amplier
Tip
Use ServiceTool to read out
Error Log.
Replace the suspected module
related to the Error Log
Read out the
temperature of the
tweeter
Seems normal?
Measure the DC
resistance of the tweeter
(wires disconnected):
Tweeter = 6.3Ω ± 0.6Ω
OK?
Replace PCB35,
Amplier
Use ServiceTool to
calibrate the new
module
Replace defective
tweeter
Use ServiceTool to
calibrate the new
speaker unit

2.8 Fault ow chart
Fault symptom:
LED indicator is ashing quickly orange
(The product is in protection mode)
Possible causes:
Defective PCB30, Digital Sound Engine
Defective PCB35, Amplier
Defective PCB48, NTC Tweeter
Defective PCB48, NTC Woofer
Defective speaker unit
Disconnect product
from mains, wait 2
minutes and
reconnect to mains
OK?
No
**
Board temperature - PCB30, Digital Sound Engine
Power Supply temperature - PCB04, Power Supply
Amplier temperature - PCB35, Amplier
Tip
Use ServiceTool to read out
Error Log.
Replace the suspected module
related to the Error Log
Connect ServiceTool
and read out product ID.
Conrm all product ID data
is correct.
OK?
Read out the
temperature of the
woofer
Seems normal?
Measure the DC
resistance of the woofer
(wires disconnected):
Woofer = 11.2Ω ± 1.2Ω
OK?
Read out the
temperature **
Seems normal?
Make an
ID Restore.
Type in all product
ID data from the
product label
Yes
Replace PCB35,
Amplier
Use ServiceTool to
calibrate the new
module
Replace the
suspected module
related to the high
temperature
Replace PCB30,
Digital Sound
Engine
Perform an
autocalibration.
OK?
Survey of plugs and pins - see page 2.13
Replace defective
woofer
Use ServiceTool to
calibrate the new
speaker unit
Disconnect the product
from mains.
Disconnect PCB48, P1 on tweeter
and woofer and conrm 470kΩ at
PCB48, NTC P1 pin 1-2
OK?
Replace defective
PCB48, NTC
Read out the
temperature of the
tweeter
Seems normal?
Measure the DC
resistance of the tweeter
(wires disconnected):
Tweeter = 6.3Ω ± 0.6Ω
OK?
Replace PCB35,
Amplier
Use ServiceTool to
calibrate the new
module
Replace defective
tweeter
Use ServiceTool to
calibrate the new
speaker unit

Fault ow chart 2.9
Fault symptom:
No sound from speaker in a wired setup
Possible causes:
Defective PCB04, Power Supply
Defective PCB30, Digital Sound Engine
Defective PCB35, Amplier
Incorrect role switch setting
Conrm that the
role switch setting
is correct
OK?
No
Set role switch
Conrm 28V at
PCB04, P4 pin 1,2
and -28V at PCB04,
P4 pin 7,8
OK?
Yes
Connect Service-
Tool and read out
Error Log.
Any suggestions?
Replace the
suspected module
related to the
Error Log.
Replace PCB30,
Digital Sound
Engine
Replace PCB35,
Amplier
Use ServiceTool to
calibrate the new
module
Replace PCB04,
Power Supply
Replace PCB30,
Digital Sound
Engine
Disconnect W4
from PCB35, P3.
Conrm 28V at
PCB04, P4 pin 1,2
and -28V at PCB04,
P4 pin 7,8
OK?
Conrm 3V at
PCB04, P3 pin 3
OK?
Check connection
between PCB04,
Power Supply and
PCB30, Digital
Sound Engine
OK?
Repair/replace
connection
Survey of plugs and pins - see page 2.13

2.10 Fault ow chart
Fault symptom:
No sound from speaker in a wireless setup
Possible causes:
Defective PCB04, Power Supply
Defective PCB30, Digital Sound Engine
Defective PCB35, Amplier
Defective PCB89, Wireless Power Link Rx
Incorrect role switch setting
No
Yes
Conrm that the
role switch setting
is correct
OK?
Set role switch
Conrm 28V at
PCB04, P4 pin 1,2
and -28V at PCB04,
P4 pin 7,8
OK?
Reset the speaker
and set up the
wireless connection
again.
OK?
Replace PCB04,
Power Supply
Replace PCB30,
Digital Sound
Engine
Conrm 3V at
PCB04, P3 pin 3
OK?
Check connection
between PCB04,
Power Supply and
PCB30, Digital
Sound Engine
OK?
Repair/replace
connection
Conrm 1.6V at
PCB89, P7 pin 22
and 3.3V at PCB89,
P7 pin 24
OK?
Connect Service-
Tool and read out
Error Log.
Any suggestions?
Replace PCB89,
Wireless Power
Link Rx
Replace the
suspected module
related to the
Error Log.
Replace PCB30,
Digital Sound
Engine
Replace PCB35,
Amplier
Use ServiceTool to
calibrate the new
module
Disconnect W4
from PCB35, P3.
Conrm 28V at
PCB04, P4 pin 1,2
and -28V at PCB04,
P4 pin 7,8
OK?
Survey of plugs and pins - see page 2.13

Fault ow chart 2.11
Fault symptom:
The signal for wireless connection is low
Possible causes:
Defective PCB30, Digital Sound Engine
Defective PCB89, Wireless Power Link Rx
Defective Wireless Antenna
Interference from other wireless systems
Distance to transmitter too long (out of range)
Reset the speaker
and set up the
wireless connection
again.
OK?
No
The distance must
not exeed 12 m.
Reposition either
transmitter or
speaker
Remove obstacles
to have
line-of-sight
Tip
Use Wi-Spy (Wi-Spy DBx + Chanalyzer Pro)
to visualize which 5 GHz channels are used
and to see if there are other wireless systems
in the area, that could cause
interference problems.
Check connections
between PCB89,
Wireless Power Link
Rx and the 4 Wire-
less Antennas
OK?
Repair/replace
connection
Replace Wireless
Antenna one by
one
Move the speaker
as close to the
transmitter as
possible
OK?
Yes
Survey of plugs and pins - see page 2.13
Conrm 1.6V at
PCB89, P7 pin 22
and 3.3V at PCB89,
P7 pin 24
OK?
Replace PCB89,
Wireless Power
Link Rx
Replace PCB30,
Digital Sound
Engine
Conrm that the distance
between the transmitter and
the speaker is less than the
recommended 12 m.
OK?
Suspected obstacles between
transmitter and speaker.
Is there line-of-sight ?

2.12 Fault ow chart
Fault symptom:
Distorted sound from speaker
Possible causes:
Defective PCB04, Power Supply
Defective PCB30, Digital Sound Engine
Defective PCB35, Amplier
Defective PCB89, Wireless Power Link Rx
Defective speaker unit
Distorted sound
from both speaker
units?
No
Locate and replace
the distorted
speaker unit
OK?
Replace PCB30,
Digital Sound
Engine
Yes
Survey of plugs and pins - see page 2.13
Conrm 28V at
PCB04, P4 pin 1,2
and -28V at PCB04,
P4 pin 7,8
OK?
Replace PCB04,
Power Supply
Replace PCB30,
Digital Sound
Engine
Conrm 3V at
PCB04, P3 pin 3
OK?
Check connection
between PCB04,
Power Supply and
PCB30, Digital
Sound Engine
OK?
Repair/replace
connection
Conrm 1.6V at
PCB89, P7 pin 22
and 3.3V at PCB89,
P7 pin 24
OK?
Connect Service-
Tool and read out
Error Log.
Any suggestions?
Replace PCB89,
Wireless Power
Link Rx
Replace the
suspected module
related to the
error log.
Replace PCB30,
Digital Sound
Engine
Replace PCB35,
Amplier
Use ServiceTool to
calibrate the new
module
Disconnect W4
from PCB35, P3.
Conrm 28V at
PCB04, P4 pin 1,2
and -28V at PCB04,
P4 pin 7,8
OK?

2.13 Survey of plugs and pinsSurvey of plugs and pins 2.13 2.13
P3 P4 P5
8 1
111 1
3
P1 LN
P3 P4 P5
8 1
111 1
3
P1
LN
P3 P4 P5
8 1
111 1
3
P1
LN
04
PCB89, Wireless Power Link Rx
89
PCB04, Power Supply

2.14 2.142.14