Grass Valley EFP1685 - Manuel (Page 175)

Chapter 3 - 1685/1686 Channel Control Unit 175
CCU1685
THOMSON EFP1685/CCU1686
User manual
B1685902AC
September 2000
12V - 30V
CAMERA
POWER
OVERLOAD CABLE OPEN
I min CAM. HEAD
LOW VOLT
+12V +300V
230 Vdc
Normally, this light lights to indica-
te presence of 12 V to supply the
camera power converter control
circuit. This voltage is obtained
from the CCU power circuit.
This indicator light, which is nor-
mally off, indicates abnormal over-
consumption in the camera head
(e.g. short-circuit).
This indicator light, which is nor-
mally off, indicates that the camera-
Channel Control Unit connection
has not been made.
Lighting of this normally off light in-
dicates that the POWER ON/OFF
switch on the camera head is on
OFF. This lights also when a came-
ra head which has not been desi-
gned to operate with the Channel
Control Unit has been connected
inadvertently: the CAMERA
POWER + 230 V DC converter is
then cut off.
This normally off indicator light indi-
cates an insufficient value in the
300 V power supply voltage from
the CAMERA POWER converter
obtained from the MAINS RECTI-
FIER board (V300 < 220 V DC).
This indicator light, which is nor-
mally off, indicates abnormal low
electrical power consumption in
the camera head.
Normally off, this indicator light in-
dicates that the + 12 V or 12 V of
the camera power converter con-
trol circuit is insufficient. (V
12V
<
10 V or V
-12V
> - 2 V).
This light, which is normally lit, in-
dicates that the camera head is
supplied with 230 V.
Normally, this indicator light lights
to indicate presence of the 30 V
standby power supply for the inter-
com system, when the POWER
ON/OFF switch on the CA85 is set
to OFF. this voltage must be pre-
sent when starting the equipment.