User's Manual

1 1 7 B 2 0 W a t t VHF High Band Transla t or Ma in t ena n ce
The 117B is designed with components that require little or no periodic maintenance except for the routine cleaning
of the Trays. The amount and time interval between cleanings depends on the conditions within the Transmitter
room. The air flow through the cabinets will be lowered which could cause heat related problems if the fans in the
Cabinet are not cleaned. Clean them with a vacuum cleaner to remove any foreign material which may have
accumulated.
The individual Trays in the Translator must also be cleaned. The amount and time interval between cleanings
depends on the conditions within the Transmitter room. While the electronics have been designed to function even
if covered with dust. A heavy buildup of dust, dirt or insects will hinder the effectiveness of the cooling of the
components and lead to a thermal shutdown or premature failure of the affected Tray.
When the front panels become dust covered, the top covers should be removed and any accumulated foreign
material removed. A vacuum cleaner utilizing a small wand type attachment is an excellent way to suction out the
dirt. Alcohol and other cleaning agents should not be used unless your certain that the solvents will not damage
components or the silk-screened markings on the Trays and boards. Water based cleaners can be used, but do
not saturate the components. The fans and heatsinks should be cleaned of all dust or dirt to permit the free flow of
air for cooling purposes.
It is recommended that the operating parameters of the Translator be recorded from the front meter on the
Upconverter/Amplifier Trays at least once a month. It is suggested that the data be recorded and that it be
retained in a rugged folder or envelope for the life of the equipment. A sample format for a Log Sheet is included in
this section. Photocopies of the Log Sheet should be made for continued data entries.