Cessna 150M - Page 246

a. After the transmitter has been removed from
aircraft in accordance with para. 16-79, place the
transmitter switch in the OFF position.
b. Remove the nine screws attaching the cover to
the case and then remove the cover to gain access to
the
battery-pack.
NarE
Retain the rubber "0" ring gasket, rubber
washers and screws for reinstallation.
c. Disconnect the battery-pack electrical connector
and remove battery-pack.
d. Place new battery-pack in the transmitter with
four batteries as shown in the case in figure 16-13.
e. Connect the electrical connector as shown in fig-
ure 16-13.
NOTE
Before installing the new 4 cell battery-
pack, check to ensure that its voltage is
11. 2 volts or greater.
ICAUTIOt-:l\
If it is desireable to replace adhesive mate-
rial on the 4 cell battery-pack, use only 3M
Jet Melt Adhesive #3738. Do not use other
adhesive materials since other materials
may corrode the printed circuit board assem-
bly.
f. Replace the transmitter cover by positioning the
rubber "0" ring gasket, if installed, on the cover
and pressing the cover and case together. Attach
cover with nine screws and rubbeJ' "lashers.
g. Remove the old battery-pack lJlocard from the
end of transmitter and replace with new battery-pack
placard supplied with the new battery-pack.
Be sure to enter the new battery-pack expira-
tion date in the aircraft records. It is also
recommended this date be placed in your ELT
Owner's Manual for quick reference.
SHOP NOTES:
16-34
Change 3
TRANSMITTER
C589510-0202
BA TTERY PACK
C589510-0205
(4 Cell Lithium)
Figure 16-13. Lithium 4 Cell
Battery Pack Installations
16-83. TROUBLE SHOOTING. Should your Emer-
gency Locating Transmitter fail the 100 Hours per-
formance checks, it is possible to a limited degree
to isolate the fault to a particular area of the equip-
ment. In performing the following trouble shooting
procedures to test peak effective radiated power,
you will be able to determine if battery replacement
is necessary or if your unit should be returned to
your dealer for repair.