Bang & Olufsen BEOLINK VIDEO, Handbook, Page: 38 / 53

MASTER LINK
TROUBLESHOOTING
34
Datalink
Datalink
BeoLink
Converter
Master Link
More than 20m
The isolation method is the fi rst course of action when troubleshooting a
Master Link installation. Start by disconnecting the link rooms in order to
fi nd out if the fault is in the main room or the link rooms. Then connect
the link rooms one by one until the fault is discovered. This is a quick way
of fi nding out if the problem is in the main room, or identifying the link
room that is the cause of the problem.
If there are no junction boxes in the system, you can also disconnect the
link rooms by disconnecting the Master Link plug from the products.
It is also possible to use the LED tester, which is a circuit tester used to
locate poor connections and broken connections in an ML system. This
tester allows you to localise faults very quickly in the individual cores of the
ML cables. All products must be disconnected while these tests are being
carried out (see page 40).
In a system where two masters (e.g. BeoLink Converter confi gured as master)
are connected and where the total length of the Master Link cable is over
20 m, you should make a short-circuit of the Master Link cable. This short
circuit is incorporated into junction boxes, so if the system includes a
junction box you do not need to create the short circuit. The short circuit
must be made between pin 3 (white/blue) and pin 12 (pink) and can be
made in one of the products, in a wall socket, or by fi tting a junction box.
In case of doubt the short circuit should be made on the ML cable
regardless of the system setup. Without the short circuit, the following
faults can arise: All link audio functions work, but link video functions do
not work.