F. Instrument Maintenance:
1. Battery Replacement.
Both parts of the Model 902 Locator are powered by four
alkaline “C” size batteries each (Eveready # E-93). When
the transmitter and receiver are on, the power supply of
each is constantly monitored by its own BATT light. When
the BATT light on an instrument no longer glows when
the instrument is on, the batteries need to be changed
for that instrument. To change the batteries of either
instrument:
a) Lay the instrument on a table with the front panel fac-
ing upward.
b) Using a regular size phillips-head screwdriver, remove
the four screws at the corners of the face panel.
c) Holding the face panel with your fingers, flip the instru-
ment over onto your lap or onto the table and lift the
blue shell off of the face panel.
d) Remove the two phillips-head screws that hold the
battery strap into place and remove to battery strap.
(At this time, be very careful not to change any of the
circuit board controls unless you are a trained techni-
cian.)
e) Remove the old "C" cells and replace them, making
sure to follow the polarity instructions on the bottom of
the battery well.
f) Turn on the instrument briefly to confirm that the BATT
light glows. If it does not, check to make sure you
inserted the batteries correctly.
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