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49
NOTE: • If you notice the following, the RAM card batteries probably need to
be changed:
- The BASIC program stored in the memory of the RAM card will not
run
-Meaningless display appears
-Unexplainable errors begin to occur
ote:
• Keep the batteries out of reach of children.
• Dispose of old batteries safely. The batteries may explode if placed in
afire.
•The original batteries were installed upon shipment from the factory,
so the battery life may be somewhat less than the normal 120 hours
operating time (for the calculator) and 40-month memory backup
time (for the RAM card).
his completes battery installation.
RAM card backup battery
The RAM card has a battery to preserve data in its memory while the power is
turned off. The service life of the battery for the standard 2K-byte RAM card is40
months when the card is removed from the calculator and stored under normal
temperature (20°C or 68°F). It is advisable to write down the date of replacement
so that you know when the batteries should next be changed.
2.
Slide the mode operation switch to MEMO/WRITE and check that the
display appears as shown.
I
T:':_EPHONE
NAME
?
RAM CARD
C O VE
R
--_tfi1~. /
Changing the RAM card
1. Turn the power switch
OFF.
2.
Locate the RAM card holder on the underside of the calculator.
3. Remove the RAM card cover (see page
47).
4. The RAM card pops out when the release is moved to the right.
5.
Remove the card, taking care not to touch the gold-colored metal contacts
on the reverse side.
6. Place the substitute RAM card in the holder with the label side facing out.
7. Put back the RAM card cover.
8.
Lock the new card in place by sliding the release switch back to the left.
9. Place the spare card in its storage holder.
8.
Put back the battery pressure plate and cover.
9. Before replacing the RAM card, slide the power switch to ON and press the
reset
switch.
0.
Rei
n stall the RAM card.
1.
Replace the RAM card cover as shown
below.
Additional RAM Cards
The calculator can use three kinds of RAM cards: the 2K-byte CE-21 OM, the
4K-byte CE-211 M, and the SK-byte CE-212M.
Many users of the calculator find it preferable to extend the available memory by
using separate RAM cards for some or all of the different functions -for
instance, one or more cards for the electronic memos, another card for BASIC
programming, and so
on.
• Remove the batteries when they become exhausted or if the
calculator is to be stored
indefinitely.
The batteries may leak and
cause damage.
6. Remove the batteries in the sequence shown.
7. Replace the old batteries with new lithium ones. First clean the new batteries
with a dry cloth. Be sure to
install them in the proper position paying attention
to the direction of the + and - symbols. (No. 1 battery should be placed with
,
t he+ symbol up and No. 2 battery should be placed with the
-
symbol up.)
CHAPTER
10 MAINTENANCE
AND PERIPHERAL
DEVICES
CHAPTER
10 MAINTENANCE
AND PERIPHERAL
DEVICES
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