20
6.
Install the retainer screw. Do not over-
tighten.
7.
Replace the back case and install the four
screws. Be sure that no wires are pinched
by the case edges when the screws are
tightened. Tighten the screws snugly but
do not over-tighten as this could strip the
plastic threads.
Battery Replacement
The MathMaster is designed to operate for
an average of five years on the factory-
installed battery. When the display becomes
too dim to read, the battery should be
replaced with a CR2032 or equivalent bat-
tery available wherever watch or calculator
batteries are sold.
Please read each step completely before
accomplishing it. A small phillips screwdriver
is required.
1.
With the MathMaster face down, remove
the four small screws securing the back
case.
