Broadcast Electronics FM-5T, User Manual

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5-2
WARNING: DISCONNECT POWER PRIOR TO SERVICING
5-9.
FIRST LEVEL MAINTENANCE .
WARNING
WARNING
NEVER OPEN THE EQUIPMENT UNLESS ALL TRANS
MITTER PRIMARY POWER IS DISCONNECTED.
5-10. First level maintenance consists of those precautionary measures applied to the equipment
to forestall future failures. These procedures are performed on a regular basis and the re
sults recorded in a maintenance log. Preventive maintenance of the transmitter consists of
good housekeeping, lubrication, and checking the performance levels using the meters and
various indicators built into the equipment.
WARNING
WARNING
NEVER OPEN THE EQUIPMENT UNLESS ALL TRANS
MITTER PRIMARY POWER IS DISCONNECTED. USE
THE GROUNDING STICK PROVIDED TO ENSURE ALL
COMPONENTS AND ALL SURROUNDING COMPO
NENTS ARE DISCHARGED BEFORE ATTEMPTING
MAINTENANCE ON ANY AREA WITHIN THE TRANS
MITTER.
5-11. On a regular basis, clean the equipment of accumulated dust. Check for overheated com
ponents, tighten loose hardware, and lubricate mechanical surfaces as required. A lubri
cant such as Lubriplate" should be applied sparingly to the tuning drives, cables, the PA
tuning line right angle gear mechanism, and the cyclometer drives behind the front panel.
The PA output loading screw drive should be opened (four screws) and lubricated every 36
months, or more often if resistance is noted.
5-12.
CONTROLLER BATTERY.
5-13. The transmitter controller is equipped with a Lithium battery. The battery has a useful
life of approximately two years. After approximately two years of service, replace the con
troller battery using BEI part number 350-2032.
5-14.
AIR FILTER.
5-15. Air filter replacement is accomplished outside the transmitter without interrupting equip
ment operation. The filter should be checked once each week with replacement done on an
as-needed basis. A dirty filter could result in dirt accumulation leaking into the cabinet
from seams, door jambs, etc. Never reverse a dirty filter. Always replace the filter.
5-16. The transmitter uses one disposable type air filter 1 inch X 16 inches X 20 inches (2.54 cm
X 40.64 cm X 50.8 cm) mounted in the rear door of the cabinet. Additional filters may be
ordered for replacement (P/N 407-0062) or locally purchased. Always mount the filter
with the airflow arrow pointing towards the blower. The exciter is also equipped with an
air filter. Refer to the exciter manual for additional information.