Front Panel Controls And Indicators - Crown CTs 1200 Operation Manual

4 Operation
4.2 Front Panel Controls
and Indicators
Note: CTs 8200 is shown. Some CTs 4200
features are in different locations.
A. Bridge Mode Indicator
Yellow LED, one per channel pair,
illumi nates when the channel pair's Mode
Switch is set to the "Bridge" position. If
Mode switch is changed while amplifi er is
powered up, Bridge LED will fl ash,
indicat ing that the amplifi er must be
powered off and on to reset the Mode. See
Section 6.9.
B. Ready Indicator
Green LED, one per channel, illuminates
when the channel is initialized and ready to
produce audio output.
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C. Signal Indicator
Green LED, one per channel, illuminates to
indicate the presence of input signals
above –40 dBu.
D. Clip Indicator
Red LED, one per channel, illuminates
when the THD of the channel's output
sig nal rises to a level typically considered
as the onset of audible clipping. The Clip
Indicator also will illuminate during
Ther mal Level Control (TLC) or input
overload.
E. Thermal Indicator
Red LED, one per channel, fl ashes when
the channel has shut down due to thermal
stress or overload. If the power supply
goes into thermal overload, all channel
LEDs will fl ash.
Figure 4.1 CTs 8200 front panel.
CTs Power Amplifi ers
F. Fault Indicator
Red LED, one per channel, illuminates
when the amplifi er output channel has
stopped operating.
G. Ventilation Grille
Front-to-rear forced airfl ow.
H. Data Indicator
Yellow LED indicates IQ Loop data activity
(if the amplifi er is equipped with an IQ-MC
module, and connected to an IQ Loop).
I. Power Indicator
Blue LED indicates amplifi er has been
turned on and AC power is available.
Indi cator also fl ashes if the amplifi er shuts
off due to an under/over-voltage condition
on the AC mains.
J. Power Switch
Amplifi er is on when the switch is in the IN
position.
Operation Manual