Studio Technologies 780-03 V.4.15 - Manual (Page 16)

Issue 1, April 2015 Model 780-03/790 User Guide
Page 16 Studio Technologies, Inc.
for Surround
jumpers to install to match a location’s AC
mains voltage. The unit uses a 3-pin IEC
320 C14-type inlet connector to mate with
a detachable AC mains cord. All units are
supplied with an AC mains cord that has
a North-American-standard plug (NEMA
5-15L) on one end and an IEC 320 C13
socket on the other. Units bound for other
destinations will require that the appropriate
cord be used. The wire colors in the mains
cord must conform to the internationally
recognized color code and should be termi-
nated accordingly:
Connection Wire Color
Neutral (N) Light Blue
Line (L) Brown
Protective Earth (E) Green/Yellow
Safety Warning: The Model 780-03
does not contain an AC mains discon-
nect switch; the AC mains cord plug
serves as the disconnection device.
Safety considerations require that the
plug and associated outlet be eas-
ily accessible to allow rapid discon-
nection of AC mains power should it
prove necessary.
As soon as AC mains power is applied
the Model 780-03 will perform a power-up
sequence. The two LEDs on the right side
of the front panel will momentarily light in a
test sequence. Then the two LEDs will flash
in cadence while the firmware loads into
the Model 780-03’s main logic device. After
a few seconds initial system operation will
commence and the two LEDs will perform
their intended functions. Once operating
data is being interchanged with the one or
more connected Model 790 or Model 71
Control Consoles the control console status
LED will light. The sync status LED will light
if a valid sync source has been recognized.
The sync status LED will flash if a valid sync
source is not recognized.
Also upon application of AC mains power,
all connected Model 790 units will go
through a power-up sequence, lighting
each of its LEDs in succession. Using its
4-digit display, each Model 790 will then
momentarily display its address, its soft-
ware version, and the main and logic device
software versions of the associated Model
780-03.
All connected Model 71 units will also go
through a power-up sequence after AC
mains power is applied to the Model 780-
03. Each of the Model 71’s three LEDs will
light momentarily. After these LEDs have
lit, the device address will be shown briefly
using the dim and reference level LEDs, as
shown in Figure 9 in the Configuration sec-
tion. When this is complete the Model 71 will
begin normal operation. Its status LED will
light if communication is established with
the Model 780-03. If the Model 71’s status
LED does not light check to see if there is a
device address conflict among all connect-
ed control consoles and that all cables are
implemented properly. Refer to the Configu-
ration section of this user guide for details
on selecting the device address.
Should an error be detected during the
start-up process the two LEDs located on
the right side of the Model 780-03’s front
panel will remain flashing in cadence. On
the Model 790 units a diagnostic code may
be displayed. Refer to the Technical Notes
section of this user guide for details.
Only after the Model 780-03 and all con-
nected Model 790 and Model 71 units have
correctly powered up will full system opera-
tion begin.