User Guide

27
Earth lift.
The input and output sockets have pin 1 (Gnd) common. This is not connected to
the psu 0V as the latter is linked to mains earth. The XL88 is normally used with
another console and the audio ground is established there.
If however it is desired to use the XL88 as a stand alone unit, the grounds may
be connected internally by fitting a link in the 0V LINK location by the side of
ST1 on the Pfl mix & output module. A high value resistor may be found in this
location to facilitate testing. This should be removed.