Earthing - THOMSON LDK 100 Technical Manual

Symbol Colour Explanation
Red High voltage terminal at which a
voltage, with respect to an other
terminal, exists or may be
adjusted to 1000V or more.
Yellow/Black Live part.
Yellow/Black This marking indicates that the
operator must refer to an
explanation in the Instruction
Manual, or that a specific
component must be replaced by
the component specified in the
documentation
reasons.
White/Black Protective
terminal.
Cathode ray tubes
Components marked on the circuit diagram are critical
for safety and include those specified to comply with X-ray
emission standards for units using cathode ray tubes and
those specified for compliance with various regulations
regarding spurious radiation emission.
When servicing units that use cathode ray tubes (CRTs),
the cathode ray tubes themselves, the high voltage circuits
and related circuits are specifically chosen so that they
comply with recognized codes pertaining to X-ray emission.
Consequently, when servicing, replace the cathode ray
tubes and other parts with specified parts only. Do not
attempt to modify these circuits as any unauthorized
modification can increase the high voltage value and
cause X-ray emission from the cathode ray tube.
Handle the cathode ray tube only when wearing shatterproof
goggles and after discharging the high voltage completely.
Safety Instructions
The rear of a CPU has two separate screw terminals for
protective earth
These are normally connected by a metal strap. The
protective earth terminal is internally connected to the
protective earth conductor of the power cable. If required,
the central earth connection wire of the studio can be
connected to terminal PE.
In normal circumstances the connection between the
for safety
protective earth and the video earth should not be broken.
The metal strap may be removed only if the studio (or OB
van) is equipped with separate protective and video earth
earth (ground)
systems. Under these circumstances the video earth
terminal must be connected to the central functional earth
potential (video earth) of the studio. This earth potential
should have functional protective and noiseless earth
(FPE) qualities as stated in the VDE regulation 0800/part2.
A low impedance interconnection of both earth conductors
must be provided at the central studio earthing point.
Mains Lead Wiring for UK Users
The wires in the mains lead are coloured in accordance
with the following code:
As the colours of the wires in the mains lead of this
apparatus may not correspond with the coloured markings
identifying the terminals in your plug proceed as follows:
• The wire coloured GREEN AND YELLOW must be
• The wire coloured BROWN must be connected to the
• The wire coloured BLUE must be connected to the
Ensure that your equipment is connected correctly - if you
are in any doubt consult a qualified electrician.
Technical Manual LDK 100 - Camera Head

Earthing

(PE) and video earth
Metal
strap
WARNING
THE UNIT MUST ALWAYS BE CONNECTED TO
PROTECTIVE EARTH.
GREEN AND YELLOW
BLUE
BROWN
connected to the terminal on the plug marked with the
letter E or by the safety earth symbol
GREEN or GREEN AND YELLOW.
terminal marked with the letter L or coloured RED.
terminal marked with the letter N or coloured BLACK.
(VE).
VE
PE
- EARTH
- NEUTRAL
- LIVE
or coloured
1-3