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: MEMORY-Udt-UP
BATTERY MODIFICATION
PROCEDURE
R-ll
LITHIUM BATTERY
(NOTE POLARITY)
.. 3, Re,install the
~.AIN
.CIRC
1
JIT
t.'·r
.\RD b:/ .ins.tallirag ,the
3
SCre~NS.
wrlich secure
the
L!t~E
and TJ-\PE connectors and AC INLET
t t )
the
r'ear
panel
t
then the
shoulder-~ype
~achine-thread
screws
at
the
2
printed
cir~uit
board
GROD~DINq
LUGS;
and the
remaining
5
self-tapping
screws.
4. Solder a 3"inch,
approx.
18 gauge, insulated
j~~per-wire
between R-141 and
D-ll (between points
"A"
and
"1'"
on the abo'v·e diagram) on the component-
side of
the
¥~J\IN
PRINTED
cr~tcuITBOARD.
Appl)T a
'-dab"
of
silicon
glue
(Radio
Shack
part
nlJrr~er
64-2314
or
equiva~~nt)
at the end of the
jumper~
wire near R-141.
\pply another Hdab" of silicon glue between BATl and
e-9
(the 330;..t Fd./3SV capacitor
Bdjacent to
the neW' Lithium
BatterY)lr
5. with th.e unit ST:ill unpl'ugged,
use at
least
a
3 1,/2 digit D.V.M.
with
a
minimum of lOMeg ohms input resistance to confirm
7 ' .
So
~
The vol t8ge -drop across the two
e~ds
of R.. ll (the 3. 3K ohm resistor
~
near
BAT1)
is approx.
0,01
milli-Volts (equivelant
to
O.003p
Amp),
and
b. The '\!olJtage measured from
eit:h~r
end of R,..ll
to chassis.aground is
approx
f
3,2
Volts.
6
f
Reinstall the
tC\p~O'"et.
apply
AC"m~~ins,
power
and . . . . . 7 erify· norm'a1 operation
to complete
tt!~
p
~cedure.
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