Bang & Olufsen BeoLab 20, Service Manual

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Repair tips 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.
Approach (ServiceTool)
Connect a service PC with ServiceTool. Follow the procedure below:
- Connect the ServiceTool to the SERVICE connector on the product as shown:
- Run ServiceTool.
- Be sure that ServiceTool is updated to the latest version. If not, upgrade and restart
ServiceTool.
- Select COM port - ATI COM port
- Scroll down to BeoLab section.
- Select
BeoLab 20 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 confirm that product data is read out on the screen.
This indicates successful communication between the product and the service PC.
NTC module test
Measure the resistance of the NTC module to determine if
the fault is caused by a defective speaker unit or the NTC
module.
It is recommended to measure on the terminals on the
back of the speaker unit. The NTC module must be
disconnected from the product.
The resistance of the NTC module at 22ºC (72ºF) is approximately 470 kΩ.
If the NTC module is outside the limits, it is defective and must be replaced.
I/O
FREE
WALL
CORNER L
R
WL
ROLE POS.
RESET
POWER LINK
R-INPUT-L IN-TOSLINK-OUT
SERVICE