Руководство Пользователя для Crown cts1200

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Operation Manual
CTs Power Amplifi ers
page 40
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.
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.
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.
Figure 4.1  CTs 8200 front panel.
4 Operation