Technical data

Service Guide 85309-90082 3-7
LO/IF Distribution Unit General Information
85309B General Safety Considerations
Servicing
Warnings applicable to this instrument
.
WARNING For continued protection against fire hazard replace line fuse only with same type and
rating: Fuse 5A/250V, Part Number 2110-0680
The use of other fuses or material is prohibited.
WARNING Always use the three-prong AC power cord supplied with this instrument with adequate
electric rating. Failure to ensure adequate earth grounding or using a power cord with
inadequate rating will impair the safety protection provided by the equipment and make
the instrument dangerous.
WARNING This is a Safety Class I product (provided with a protective earthing ground incorporated
in the power cord). The mains plug shall be inserted only into a socket outlet provided
with a protective earth contact. Any interruption of the protective conductor, inside or
outside the product is likely to make the product dangerous. Intentional interruption is
prohibited.
WARNING These servicing instructions are for use by qualified personnel only. To avoid electrical shock, do
not perform any servicing unless you are qualified to do so.
WARNING The opening of covers or removal of parts is likely to expose dangerous voltages. Disconnect the
instrument from all voltage sources while it is being opened.
WARNING This product is designed for use in Installation Category II and Pollution Degree 2.
WARNING No operator serviceable parts inside. Refer servicing to qualified personnel. To prevent electrical
shock do not remove covers.
WARNING If this product is not used as specified, the protection provided by the equipment could be impaired.
This product must be used in a normal condition (in which all means for protection are intact) only.
WARNING The detachable power cord is the instrument disconnecting device. It disconnects the
mains circuits from the mains supply before other parts of the instrument.