Bang & Olufsen BeoCenter 2 MK II User manual

BeoCenter 2 MK II
Type 2802, 2825, 2526, 2827, 2828, 2829, 2830, 2831,
2832, 2833, 2834, 2835, 2836, 2837, 2838
From serial no. 19368112
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 !

CONTENTS
Survey of modules ........................................................................................ 1.1
How to service .............................................................................................. 1.2
PIN-code ....................................................................................................... 1.3
Warnings ...................................................................................................... 1.5
Adjustments ................................................................................................. 2.1
Service menu ................................................................................................ 3.1
Service tips .................................................................................................... 4.1
Replacement of modules ............................................................................... 5.1
Specification guidelines for service use .......................................................... 6.1
Overall blockdiagram .................................................................................... 7.1
Wiring diagram ............................................................................................. 7.3
Available parts .............................................................................................. 8.1

BeoCenter 2 MKII – Master Unit
PCB2 Top Interface
PCB3 Clamper Light
PCB4 IR receiver two (right)
PCB5 IR receiver one (left)
PCB7 Keyboard left/right
PCB8 Keyboard left/right
PCB9 Display
PCB77 DVD Main Board Assy
PCB95 DVD Traverse Mechanism
BeoCenter 2 – Socket Unit
PCB6 µP H8-4
PCB10 AV panel DAB
PCB37 DAB module
PCB50 Analog sound engine
PCB60 SMPS
PCB85 Tuner EU/US/JPN
Survey of modules 1.1

How to service
Front line service
Both the Master and the Socket Unit has been developed for simple module
exchange to follow the on-site service strategy. Module exchange is possible on-site,
at the dealer or in the service workshop whatever is most convenient in each case.
For on-site service a back-up suitcase must be used.
Module exchange is the recommended way to perform service, due to the fact
that most of the modules are multi layer based, and most of the circuits are on a
single main PCB.
An electrical fault symptom can be removed during one visit to the customers
home if you bring a BeoCenter 2 back-up suitcase with you.
Is it a mechanical symptom, the particular part must be brought with you
separately.
The Socket Unit and the Master Unit must be connected when testing, because
the Socket Unit contains the power supply.
Service documentation
Service documentation for BeoCenter 2 will be a Service Manual with part nos. for
the back-up suitcase, electrical and mechanical parts, user’s guides etc.
1.2 How to service

Converting mains voltage supply
The Master Unit has only one variant for all markets.
The Socket Unit has separate type nos. for each market, due to country approvals.
The mains voltage is determined by the type nos. of the Socket Unit, there are
only two internal mains voltage settings (a jumper) on the SMPS, 100/120V and
230/240V AC. (X103, when mounted = 100/120V).
Use the ServiceTool to reprogramme the DVD region code and tuner setup.
The only variant on the Master Unit : 2802
The variants on the Socket Unit :
Type no. Area Region Mains Voltage Market
2825 EU2 DVD region 2 230V Austria, Belgium, Croatia,
Czech Repub., Denmark, Egypt,
Finland, France, Germany, Greece,
Holland, Hungary, Israel, Italy,
Lebanon, Norway, Oman, Poland,
Portugal, Qatar, Saudi Arabia,
Slovak Rep., Slovenia, Spain,
Sweden, Switzerland, Turkey
2826 EU3 DVD region 3 240V Indonesia, Malaysia, Singapore,
Thailand
2827 EU4 DVD region 4 230V Argentina, Chile, Peru, Uruguay
2828 EU5 DVD region 5 230V Morocco, Russia
2829 GB2 DVD region 2 230V Bahrain, Kuwait, South Africa, UK,
United Arab Emirates
2830 GB3 DVD region 3 230V Hong Kong
2831 US1 DVD region 1 120V Canada, USA
2832 US4 DVD region 4 120V Brazil, Mexico
2833 JP2 DVD region 2 100V Japan
2834 AU4 DVD region 4 240V Australia, New Zealand
2835 TW3 DVD region 3 110V Taiwan
2836 KR3 DVD region 3 110V Korea
2837 LA4 DVD region 4 230V Argentina, Chile, Peru, Uruguay
2838 CH6 DVD region 6 230V China
DVD Region setup
First time the Master Unit is connected to the Socket Unit, and powered, the DVD
region code is set, and stored.
How to service 1.3

PIN-code
The product has a 4 digit PIN-code, of the user´s own choice, which must be entered
if the product has been disconnected from the mains for 15-30 min.
If the PIN-code is activated, and the product has been without mains for 15-30 min.,
the user will be asked to enter the 4 digit PIN-code when the product is switched on.
Before the product is handed in to service it is a good idea to ask the customer to
deactivate the PIN-code.
The PIN-code is activated when the product is shipped from Bang & Olufsen.
Refer to the user guide for further information.
PIN-code active prior to service
If the PIN-code is not deactivated prior to service you must use the Service code to
unlock the product.
Service code
The service code
- unlocks the product, but does not affect the pin-code setting
- gives you 12 hours service time
Entering the Service code
1. When the product asks for PIN-CODE press and hold lfor 3 seconds.
2. The Master code menu appears.
3. Enter the Service code: 1 1 1 1 1.
Important notice concerning Service time
The service time is active as long as the product is connected to the mains, including
Standby.
To obtain maximum service time:
Only connect the product to the mains while you are performing actual service on
the product.
When the service time is expired, the product can only be unlocked by entering
the PIN-code or the Master code.
Registration of the modules
The modules will be registered to the product in the following situations:
- the product has been connected to the mains for more than 12 hours, including
Standby time.
- the PIN-code is activated or deactivated.
PIN-code deactivated by customer prior to service
With the PIN-code deactivated prior to service you must be aware of the modules
will be registered to the product in the following situations:
- the product has been connected to the mains for more than 12 hours, including
Standby time.
- the PIN-code is activated or deactivated.
The registration of modules in the product can only be changed at Bang & Olufsen.
1.4 PIN-code

PIN-code 1.5
Activate the PIN-code
Select the SETUP menu.
Press ltwice and then STOP to bring up the PINCODE SETUP menu.
Enter the 4 digit Pin-code. Re-enter the code to confirm it and press GO.
If you want to change or delete the PIN-code, enter the correct PIN-code and press GO.
It is now possible to change the PIN-code or delete the PIN-code.
Enter the PIN-code
If the PIN-code is activated and the product is disconnected from the mains for
more than15-30 minutes, a PINCODE menu appears as soon as the product is
switched on.
Enter the PIN-code, and the product starts again.
If the PIN-code has been forgotten
If the PIN-code has been forgotten the only way to unlock the product again is by
entering a 5 digit Master-code.
The Master-code is ordered by sending a request via the Retail System.
When the product prompts for a PIN-code, press and hold ldown to bring up the
MASTERCODE menu.
Enter the Master-code and press GO. This will deactivate the PIN-code and
reactivate the product.
Product locked by PIN-code
The product is locked by PIN-code when:
- The PIN-code is activated and the mains is disconnected for more than 15- 30
minutes.
The product is unlocked when the PIN-code is entered.
The PIN-code counter is set to 5 attempts within 3 hours.
When a wrong PIN-code has been entered 5 times within 3 hours, the product
cannot receive any commands for a period of 3 hours.
After this period the PIN-code counter is reset.
The product must be in standby mode to activate the timer.

Warnings
ESD
When electrical replacements or disassembly is taking place, use a ESD-mat. The
internal electronic are very sensitive to static electricity.
When mains voltage on the BeoCenter 2 is required, remove the connection from
the BeoCenter 2 to the ESD mat.
Laser exposure
The BeoCenter 2 contains a laser system and is classified as a class 1 laser product.
The BeoCenter 2 must only be opened by qualified personal only.
General Warnings
Wear cutton cloves to avoid any fingerprints on the product.
The aluminium and display surface on the product is very sensitive, so handling
should be done with great care to avoid damage. When transporting the
BeoCenter 2 it is recommended to use the product cover, part no. 3375021.
The interface cable is very sensitive to sharp bends and other large mechanical
influence. Also be sure that the plugs in each end, are connected correctly.
Cleaning
Clean the BeoCenter 2 surfaces using a lint-free cloth which you have wrung
firmly in lukewarm water.
Never use alcohol or other solvents to clean any parts of the BeoCenter 2.
STATIC ELECTRICITY
MAY DESTROY THE
PRODUCT
1.6 Warnings

Adjustments
Digital Audio Broadcasting (DAB)
The DAB module (type 2203) for the BeoCenter 2 Socket Unit will automatically
adapt to the band and frequency table preprogrammed in the application software
for the particular Socket Unit type number. If the band and frequency table setup
from the factory do not correspond to the particular country where it is used, the
PC-based ServiceTool program must be used.
DAB aerial
Select a channel transmitting a DAB mutiplex signal. Position the aerial to maximum
signal level.
Keyboard: Press “LIST” pselect “SETUP” n“RADIO” p“DAB AERIAL ADJUSTMENT”
then press GO.
Beo4 remote control: Press “MENU” pselect “SETUP” n“RADIO” p“DAB
AERIAL ADJUSTMENT” then press GO.
Watch the indicator bar on the display while adjusting the DAB aerial. The white
fields indicates minimal risk of signal drop-out.
DAB DRC
Dynamic Range Control “DRC” appears in the lower right-hand corner of the
display if transmitted with the DAB program and DRC is not set to OFF. DRC in
nominal ‘NOM’ or ‘MAX’ position reduces the signal level between the weakest
and the strongest signal and thereby compensates for disturbance from the
surroundings. See more information in the Users guide.
Adjustments 2.1

2.2