BSS Audio FCS-930/960 User Manual v3.0
Page 11
9 Service section
9.1 Chassis/0V removal
The FCS-930/960 has the signal 0v ground connected to the metal chassis, which
in turn is connected to the safety ground. In the unlikely event that you need to
remove this link, or if you need to add a small impedance to reduce earth loop
currents, then proceed as follows.
Since both the audio inputs and outputs are wired fully balanced we would suggest
that you fully recheck all audio wiring for correctness, prior to proceeding.
Under no circumstances should the incoming safety ground wire be disconnected
from the power line cord, or from the internal chassis connection as an alternative
to this procedure.
1 Disconnect the mains power cord and remove the unit’s top cover.
2 Locate the link on the printed circuit board adjacent to the rear PCB fixing
bracket marked ‘GROUND LIFT’.
3 Remove this link.
The signal/0v ground is now isolated from the chassis.
The other link, marked ‘PIN 1 TO CHASSIS’ is connecting the output XLR pin 1
connections to chassis. Under no circumstances is it recommended that you
remove this link.
!!! WARNING - Refer all servicing to qualified service personnel !!!
Risk of electric shock if the unit is opened.
BSS Audio accepts no responsibility for injury
subsequent to opening of the unit.
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