B.E.S. - BOWLER ENTERTAINMENT SYSTEM
Pre-Installation Manual
Copyright 2007 Qubica S.p.A.
March 2007 – rev. 2B
9
To avoid this kind of problem the installations MUST always have ground points 2 and 3
connected together as illustrated in the following diagram.
However, in the case of very strong disturbances between points 1 and 2+3, disturbances could
still appear on the monitors. In this case, given that the problem appears just because of strong
disturbances, the real reason is that the ground of the bowling building is in bad condition. You
must take into account an incorrect connection of the neutral on the metal support structure
through the chains or any other possible bad ground conditions in the bowling building.
In order to find out which ground is causing the problem, follow the instructions illustrated
below:
•
You have to eliminate any other connections and check the screen with only the RDB
and monitor power cable connected (obviously leaving the signal cables connected).
See the diagram below.
Following the diagram illustrated above it is clear that the only two grounds connected
are the metal structure (1) and the power supply cable ground (2+3).
