Bang & Olufsen BeoLab 12-3 Manual de usuario

BeoLab 12-3

Type 6232

Service Manual - version 1.0

English

German, French, Italian, Spanish, Dutch, Japanese, Korean and

Simplied Chinese versions are available in the Retail System

This Service Manual must be returned

with the defective parts/back-up suitcase !

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

Before assembly process – Assembly process –

Final check after repair .............................................................. 5.1

Specication guidelines for service use ...................................... 6.1

Block diagram ........................................................................... 7.1

Wiring diagram ......................................................................... 7.2

Available parts .......................................................................... 8.1

Change log:

Ver. 1.0 ................................................................. Original release

Survey of modules

Modules:

PCB04 SMPS

PCB30 Digital Sound Engine (DSE)

PCB35 ICEpoweramplier(x3)

PCB40 Interconnection

PCB41 V.CON (not present in all versions)

PCB47 LED Indicator

PCB48 NTC(x3)

PCB68 Signal Switch

Speaker units:

Tweeter unit

Midrange unit

Woofer(cosconex2)

Survey of modules 1.1

1.2 How to service

How to service

Strategy

The repair involves replacement of the module(s). 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 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.

Preparations before service

Fault explanation and demonstration

Before troubleshooting is initiated, let the customer demonstrate the fault, if

possible.

Important!

After the modules have been replaced and the product is ready to be assembled,

there are some very important steps you must be aware of before starting the

assembling process of the product.

Please refer to page 5.1.

Recommended tools for service

- Static-protectiveeldservice

- White gloves

- Shoe covers

- Soft lint-free cloth for cleaning

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 5.7.

How to service 1.3

Warnings when handling

Static electricity

Static electricity may damage the product.

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 × o o o o o

PCBA × o o o o o

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 errors .................................................................. 2.2

Product Information - Usage data ..................................................... 2.3

Error log ........................................................................................... 2.3

Test - Sound ...................................................................................... 2.4

Speaker unit check ........................................................................... 2.5

NTC module test ............................................................................... 2.5

Fault ow chart

No function, No LED indication ......................................................... 2.6

No power ON, Red LED indication ..................................................... 2.8

LED indicator is orange (constant lit) ................................................ 2.10

LED indicator is ashing orange ...................................................... 2.12

No sound from any speaker, Green LED indication .......................... 2.14

Distorted audio from one or more speaker(s) .................................. 2.16

2.2 Troubleshooting

Troubleshooting

LED indicator

If errors occur during operation, the product will enter an error state. The LED in

the lens tweeter unit indicates the respective error state by changing colour (red/

orange/green), ashing or lit.

Description of LED errors

- Green

Constant lit:

Product is ON and no problems is observed.

Flashing:

Software update is on-going (or ready for software update).

- Orange

Constant lit:

The product is operating but something is on the limit. The product will revert to

normal operation by itself without the need of user interaction.

This could be:

- The product is close to overheating, and have shortly turned off one or more

ampliers shortly.

- Over current protection circuit switched off amplier shortly.

Flashing:

The product is having a fail. Product will not revert to normal operation.

In most cases it is required to contact a retailer. In some cases can be resolved by

disconnecting/connecting the mains.

This could be:

- NTC is defective or disconnected.

- Over current protection is constantly active.

- Over heating of ampliers.

- Serial/type numbers are missing.

- Calibration is not done (to be done by service personnel).

- Calibration failed.

- Red

Constant lit:

Product is turning off (or will turn off in a short time)

Note!

The blinking frequency is telling the severity of the problem. Blinking slowly is used

for smaller problems. Blinking fast is used for bigger issues.

LED

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:

- Remove the service lid next to the mains inlet.

- Connect the ServiceTool hardware from the service connector on the product to

the service PC as shown:

- 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 12-3 and click Launch.

- Click on the PRODUCT tab (if not already shown).

- Click +next to each item (BeoLab-> BeoLab 12-3 to expand the menus.

- Click Info -> Product (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

Test - Sound

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 Test Sound 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.

For use simply choose a sound frequency and an output amplier to activate the

test function.

Woofer 1

Woofer 2

Midrange

Tweeter

I/O

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