Compaq TFT8030, Руководство пользователя

Страница: 40 / 42

The relevant TCO'99 demand requires that plastic components
weighing more than 25 grams must not contain flame retardants
with organically bound bromine or chlorine. Flame retardants are
allowed in the printed circuit boards since no substitutes are
available.
Cadmium**
Cadmium is present in rechargeable batteries and in the colour-
generating layers of certain computer displays. Cadmium
damages the nervous system and is toxic in high doses. The
relevant TCO'99 requirement states that batteries, the colour-
generating layers of display screens and the electrical or
electronics components must not contain any cadmium.
Mercury**
Mercury is sometimes found in batteries, relays and switches. It
damages the nervous system and is toxic in high doses. The
relevant TCO'99 requirement states that batteries may not
contain any mercury. It also demands that mercury is not present
in any of the electrical or electronics components associated with
the labelled unit. There is however one exception. Mercury is,
for the time being, permitted in the back light system of flat
panel monitors as there today is no commercially available
alternative. TCO aims on removing this exception when a
mercury free alternative is available.
CFCs (freons)
The relevant TCO'99 requirement states that neither CFCs nor
HCFCs may be used during the manufacture and assembly of the
product. CFCs (freons) are sometimes used for washing printed
circuit boards. CFCs break down ozone and thereby damage the
ozone layer in the stratosphere, causing increased reception on
earth of ultraviolet light with e.g. increased risks of skin cancer
(malignant melanoma) as a consequence.
Compaq TFT8030 Flat Panel Monitor User’s Guide 39