Front Panel Controls And Indicators - Crown CTS4200 Operation Manual

CTs Multi-Channel Power Amplifi ers
2 Setup
(continued)
2.4 Front Panel Controls
and Indicators
Note: CTs 8200USP/CN is shown. Some CTs 4200
USP/CN features are in different locations.
A. Bridge Mode Indicator
Yellow LED, one per channel pair, illuminates 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, indicating that the
amplifi er must be powered off and on to reset the
Mode.
B. Ready Indicator
Green LED, one per channel, illuminates when the
channel is initialized and ready to produce audio
out put.
Operation Manual
C. Signal Indicator
Green LED, one per channel, illuminates to indicate
the presence of analog input signals above –40 dBu.
D. Clip Indicator
Red LED, one per channel, illuminates when the THD
of the channel's output signal rises to a level typically
considered as the onset of audible clipping. The Clip
Indicator also will illuminate during Thermal 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.
F. Fault Indicator
Red LED, one per channel, illuminates when the
amplifi er output channel has stopped operating.
Figure 2.3 CTs 8200USP/CN Front Panel
G. Ventilation Grille
Front-to-rear forced airfl ow.
H. Data Indicator
Yellow LED fl ashes whenever a command addressed to
the module is received. A similar LED is on the back panel,
and the two LEDs fl ash simultaneously.
I. Power Indicator
Blue LED indicates amplifi er has been turned on and AC
power is available. Indicator 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.
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