THOMSON DD10, Installation Manual

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Safety instructions DD Production Switchers
2 Rev 1 / 03.1998
Caution – Double-pole or neutral fusing! After acting of the protective devices,
parts of the equipment may remain under voltage. Each main input is is protected
by two primary-side fuses located on the power terminal of the switchers units
(mainframe, panel). Additionally, the power supply units will be protected by inter-
nal fuses.
When replacing the fuses, make sure that a fuse link of same type and same cur-
rent rating is used. Never use a mended fuse! Do not short-circuit the fuseholder!
Operate the switcher in the closed condition only, i.e. the mainframe with closed
door and locked panel. There are no parts inside the unit to be adjusted by the user
or parts to be exchanged.
Caution: Opening the mainframe door or the panel desk may give
access to live parts.
In such cases, the unit has to be disconnected completely from the mains.
If, however, working on the opened mainframe or opened panel is inevitable,
this has only to be done by qualified service personnel being informed about
the dangers involved.
Attention! Capacitors may still carry a residual charge!
If, for example, due to a failure, safe operation of the switcher is no longer ensured,
put the switcher out of operation and secure it against further use.
Do not insert or remove plug-in cards during operation.
Make sure that no parts protrude into the air conditioning holes. This might lead to
contact with dangerous voltages or to damages of sensitive circuit parts.
To prevent damages in the control panel gear no drinks in top of the desk. Pene-
trated liquids can lead to destroying the control panel boards. Make sure that no
small parts (e.g. office parenthesis) fall into the opening under the levers. This can
lead to short-circuits and damages.
The EMV regulations are only applicable when correctly shielded cables are used
for the installation of the equipment. This applies to video cables as well as control
cables. Corresponding cables can be obtained from BTS.
Run all connection cables in covered cable ducts (risk of stumbling).
For main connection, only use the supplied connection cable or a checked cable of
the same type.
The controller boards of the DD switchers contains a lithium battery, which has to be
exchanged every five years. Detailed information you can find in the section Ex-
change of the lithium battery in the service manual.
Used batteries must be disposed of carefully to avoid environmental damage.
Fuses
During operation
Connecting cables
Batteries