Wheatstone TV-80, Technical Manual

Page: 64 / 120

C O N T R O L R O O M
page 5 – 5
TV80 / Sep 98
Cue Speaker Output Mode
PCB-mounted slide switch “SW19” (see Technical Drawings
CR-80 schematic page 71 D-2, and PCB load sheet page 74 lower
center) determines whether the module’s cue speaker output is stereo
or mono (L+R sum).
Headphone Output Options
Headphone Amp Output Mode
PCB-mounted slide switch “SW20” (see Technical Drawings
CR-80 schematic page 71 B-2, and PCB load sheet page 74 lower
center) determines whether the module’s headphone amplifier output
is stereo or mono (L+R sum).
Headphone Line Output Pre/Post Select
PCB-mounted slide switch “SW18” (see Technical Drawings
CR-80 schematic page 71 C-4, and PCB load sheet page 74 center)
determines whether the module’s electronically balanced line level
headphone output is pre or post headphone level control.
Control Room “On-Air” Tally Port
The CR-80 module tally port is activated by the console’s mute
control lines (see dipswitch “SW23”, preceding). Tally signals are
outputted at the module’s DB-9 “TALLIES” connector, located at the
top of the module’s rear panel. There are two types of control signals
available:
a) a simple relay closure with N.O., N.C. and tally common pins
(maximum current 50 milliamps at 24V), and
b) opto-isolated tally+ and tally– control pins (used to power an
ex5V tally light/LED; maximum current 50 milliamps).
If you will be using a high powered lamp/bulb for the external tally,
you will need to provide an external power and relay circuit that takes
its control pulse from the CR-80 module’s tally pins.
TALLY NO
+5V DIG
TALLY COMMON
TALLY +
N/C
DIG COMMON
DIG COMMON
TALLY -
TALLY NC