B.E.S. - BOWLER ENTERTAINMENT SYSTEM
Pre-Installation Manual
Copyright 2007 Qubica S.p.A.
March 2007 – rev. 2B
8
A.2
Suggested Ground Connection
Preface:
The recommended electric plant for the score is one based on one and only one ground to which
are connected all the ground circuits of the plant (Front desk, Over Head Monitors, RDB etc...).
If the score installation has used or adapted the already present electric plant of the bowling
building, this can be cause of problems with the monitor images, mainly due to a bad ground.
During the score installation on the pair of lanes, there can be different connections to ground,
which depend on the electrical wiring of the bowling center.
Ground 1: Ground normally connected to the monitor chains (if any)
Ground 2: Ground cable connected to the monitor through the power supply cables
Ground 3: Ground cable connected to the RDB through the power supply cable
If the four grounds are ever at different voltage levels, this can cause serious disturbances to the
system. In particular, a slight voltage variation between points 2 and 3 could cause a very
visible disturbance on the monitors.
