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1
Getting Started
Installing the AC Adapter
1. Press
V
.
2. Connect the adapter cord to the socket on the back of the calculator.
3. Plug the adapter into an electrical outlet.
Warning
Using any AC adapter other than the appropriate TI adapter
may damage the calculator and void the warranty.
Installing or Replacing Batteries
1. Press
V
. Unplug any connected AC adapter.
2. Remove the battery compartment cover from the bottom of the
calculator.
3. If necessary, remove the old batteries.
4. Insert new batteries in the compartment as shown in the diagram
inside the battery compartment.
5. Replace the battery compartment cover.
Installing the Paper Roll
Caution:
Avoid placing a double thickness of paper into the mechanism.
Do not pull the paper through the mechanism without pressing
&
.
1. If necessary, press
G
to turn the calculator on, and press
S
to turn the
PRINT
display indicator off.
2. Remove the printer compartment cover by placing a thumb on each
of the lower ridged corners of the cover. Push until the cover pops
open, and lift the cover off.
3. Go to Page 2 and follow the instructions for the size of the paper roll.
2
To install a small paper roll: (continued from Page 1)
4. Unroll a few inches of paper from the small roll and cut the end
squarely.
5. Hold the paper so that it unrolls from the bottom, and insert the end
of the paper into the slot under the printing mechanism.
6. Press
&
until the paper feeds out of the top of the printer
compartment.
7. Place the small roll of paper inside the compartment.
8. Feed the end of the paper through the slot behind the clear plastic
“window” of the printer compartment cover. Then snap the
compartment cover back onto the unit.
To install a large paper roll: (continued from Page 1)
4. Lift the paper holder so that it extends behind the printer
compartment.
5. Insert the end of the paper into the paper slot on the back of the
calculator as shown on the next page. To avoid paper jams, use
quality bond paper.
3
6. Insert the end of the paper into the slot under the printing mechanism.
7. Press
&
until the paper feeds out of the top of the printer compartment.
8. Feed the end of the paper through the slot behind the clear plastic
“window” of the printer compartment cover. Then snap the
compartment cover back onto the unit.
9. Place the paper roll on the paper holder.
Note
To prevent damaging the printer (which may void the warranty),
turn the printer off when operating the calculator without paper. To turn
it off, press
S
so that
PRINT
is not displayed.
Replacing the Ink Roller
1. Press
V
.
2. Remove the printer compartment cover.
3. Remove the ink roller from the right
side of the compartment. Insert your
index finger, nail down, under the tab
on top of the ink roller. Gently lift the
ink roller out of the compartment.
4. Lower the new ink roller (IR-21) into
the compartment and align the hole
in the ink roller with the pin in the
compartment. Press down until it
snaps into place.
5. Replace the compartment cover.
Warning
Never refill or moisten the old ink roller. This can damage the
printing mechanism and void the warranty.
4
Key Descriptions
&
Advances the paper.
S
Turns the calculator’s printer on and off.
R
Selects the rounding setting. See “Rounding.”
/
Prints a reference number or date without affecting calculations. This
number is preceded by a # sign. You can also enter decimal points to
separate parts of the number; for example, to print a date.
Q
Selects the decimal setting. See “Using Decimals.”
!
Changes the sign (
+
or
–
) of the displayed number.
#
Calculates the selling price and profit or loss amount on an item.
G
Turns on the calculator. If the calculator is on, press
G
once to
clear an entry; press
G
twice to clear a pending operation.
>
Interprets the number in the display as a percentage.
U
Press
U
to display and print the value in memory; press
U
twice to clear the memory.
F
Subtracts the displayed value from memory. If a multiplication or
division operation is pending,
F
completes it and subtracts the
result from memory.
N
Adds the displayed value to memory. If a multiplication or division
operation is pending,
N
completes it and adds the result to memory.
Rounding
R
No indicator
Results are rounded up or down, depending on the value and
decimal setting (if
Q
=
2
, 2.349 rounds to 2.35).
9
Results are rounded up (if
Q
= 1
, 2.33 rounds to 2.4).
:
Results are rounded down (if
Q
= 1
, 2.33 rounds to 2.3).
Using Decimals
Q
No indicator
The number of decimal places varies based on the result.
0,1,2,3,4,6
Sets the number of decimal places to 0, 1, 2, 3, 4, or 6.
A
Lets you add and subtract numbers without entering the
decimal point (key in 5321 to enter 53.21).
A
II
Lets you multiply and divide numbers without entering the
decimal point (key in 3 x 250 to enter 3 x 2.50).
5
Clearing Errors and Overflows
Entry Errors
Press
G
to clear an incorrect entry.
Error and Overflow Conditions
If you divide by zero or calculate a selling price using a margin of 100%,
an error occurs. The calculator prints
0 .*
and a row of dashes and
displays
E
.
An overflow occurs if you calculate a result with too many digits for the
calculator to display or print. The calculator displays
E
and prints a row
of dashes and the first ten digits of the result with the decimal shifted 10
places to the left of its correct position.
To clear an error or overflow condition,
press
G
. The memory is not
cleared unless the error or overflow occurred in a memory calculation.
Performing Basic Calculations
Squares
2.5
2
= 6.25
Q
= 2,
R
= No indicator
Press Display Print
G
2.5
?
3
6.2
5
2.
5
2.
5
6.2
5
x
=
∗
Reciprocals
1/25 = 0.04
Press Display Print
G
25
%
3
3
0.0
4
25
.
25
.
1.0
0
1.0
0
0.0
4
P
=
∗
=
∗
6
Using Memory Operations
Multiplication with Memory Keys
You need the total of 3 items at 10.50
and 5 items at 4.95. By using the memory, you will not disturb a current
calculation.
Press Display Print
U
U
†
10.5
?
3
N
10.
5
x
3
.
=
M
31.5
0
31.5
0
M+
4.95
?
5
N
4.9
5
x
5
.
=
M
24.7
5
24.7
5
M+
U
††
M
56.2
5
56.2
5
M
◊
4.95
?
5
F
†††
4.9
5
x
5
.
=
M
24.7
5
24.7
5
M–
U
31.
5
31.
5
M
◊
† U
U
clears the memory.
††
You recall the value in memory.
†††
You decide not to order the last item.
Calculating Gross Profit Margin
Performing a GPM Calculation
1. Enter the cost of the item and press
?
.
2. Enter the profit or loss amount. Enter a loss amount as a negative
value.
3. Press
#
.
Sample GPM calculations are shown on the next page.
7
Calculating a Profit Amount
An item cost you 65.00. You want to earn a
40% profit. Calculate the selling price.
Press Display Print
G
65
?
65
.
65
.
x
40
#
40
.
M%
108.3
3
108.3
3
∗
Calculating a Loss Amount
An item cost you 35,000. You must sell it,
but can only afford to lose 33.3%. Calculate the selling price.
Press Display Print
G
35000
?
35,000
.
35000
.
x
33.3
!
#
–33.
3
M%
26,256.5
6
26256.5
6
∗
Calculating Percentages
Percent
49 x 15%
Press Display Print
G
49
?
49
.
49
.
x
15
>
7.3
5
15
.
7.3
5
%
∗
Add-On
1,450 + 15%
Press Display Print
G
1450
9
1,450
.
1450
.
+
15
>
1,667.5
0
15
.
1667.5
0
%
∗
Discount
69.95
-
10%
Press Display Print
G
69.95
.
69.9
5
69.9
5
–
10
>
62.9
5
10
.
62.9
5
%
∗
8
Percent Ratio
29.5 is what percent of 25?
Press Display Print
G
29.5
%
29.
5
29.
5
ö
25
>
118.0
0
25
.
118.0
0
%
∗
Using Constants
Multiplying by a Constant
5 x 3 = 15 5 x 4 = 20
The first number in a multiplication problem is the constant multiplier.
Press Display Print
G
5
?
5
.
5
.
x
3
3
3
.
=
15.0
0
15.0
0
∗
4
3
4
.
=
20.0
0
20.0
0
∗
Note:
You can also find different percentages of a constant value by
completing the calculation with
>
instead of
3
.
Dividing by a Constant
66 ÷ 3 = 22 90 ÷ 3 = 30
The second number in a division problem is the constant divisor.
Press Display Print
G
66
%
66
.
66
.
÷
3
3
3
.
=
22.0
0
22.0
0
∗
90
3
90
.
=
30.0
0
30.0
0
∗
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33
TI Product Service and Warranty Information
TI Product and Services Information
For more information about TI products and services, contact TI by e-
mail or visit the TI calculator home page on the world-wide web.
e-mail address:
internet address:
http://www.ti.com/calc
Service and Warranty Information
For information about the length and terms of the warranty or about
product service, refer to the warranty statement enclosed with this
product or contact your local Texas Instruments retailer/distributor.
Informations sur les services et la garantie TI
Informations sur les produits et les services TI
Pour plus d’informations sur les produits et les services TI, contactez TI
par e-mail ou consultez la page principale des calculatrices TI sur le
world-wide web.
adresse e-mail :
adresse internet :
http://www.ti.com/calc
Informations sur les services et le contrat de garantie
Pour plus d’informations sur la durée et les termes du contrat de
garantie ou sur les services liés aux produits TI, consultez la garantie
fournie avec ce produit ou contactez votre revendeur Texas Instruments
habituel.
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