Studio Technologies 85 - Manual (Page 9)

Model 85 User Guide Issue 4, June 2011
Studio Technologies, Inc. Page 9
120, or 220/240 Vac, 50/60 Hz is required.
Confirm what mains voltage is required by
observing the selection boxes to the left
of the AC mains connector on the back
panel. Whenever mains power is con-
nected the power present LED should be
lit. If the LED is not lit confirm that the main
power source is active (“hot”) and that the
connector on the cord is securely mated
with the plug on the back panel.
For safety in the event of a major internal
failure or the connection of incorrect AC
mains voltage, the Model 85 contains a
fuse inside the cabinet. The fuse will open
(“blow”) if the failure of an internal com-
ponent causes excessive current to be
drawn from the internal power supply. The
fuse will also open should 220/240 Vac be
connected to a Model 85 that is configured
for 100 or 120 Vac operation. The fuse is
intended to be replaced only by a qualified
service technician. This person will have
the training to safely access the “guts” of
the Model 85 and identify where a problem
is located.
If Signal Doesn’t Seem to Be Present
on the Outputs
Valid outputs depend on a valid input
source. Ensure that the signal present
LEDs are lit in response to what you con-
sider valid input signals. Should a signal
present LED not be lit confirm that the
source is operating and the cabling has
been correctly prepared. On the front
panel, check the output source selection
switches to confirm the correct settings.