IBM 5155 Manual To Operations page 365

If this equipment does cause interference to radio or
television reception, which can be determined by
turning the equipment off and on, the user is
encouraged to try to correct the interference by one or
more of the following measures:
• Reorient the receiving antenna.
• Relocate the equipment with respect to the receiver.
• Move the equipment away from the receiver.
• Plug the equipment into a different outlet so that
equipment and receiver are on different branch
circuits.
• If peripherals not offered by IBM are used with this
equipment, it is suggested that you use shielded,
grounded cables with in-line filters, if necessary.
If necessary consult your dealer service representative
for additional suggestions.
The manufacturer is not responsible for any radio or
TV interference caused by unauthorized modifications
to this equipment. It is the responsibility of the user to
correct such interference.
CAUTION
This product is equipped with a line cord and plug
designed for the user's safety. It is to be used with a
properly grounded receptacle to avoid possible
electrical shock.
January
1984
Expansion Unit 3