TABLE OF CONTENTS
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Electronic Printer Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
BASIC OPERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Initial Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Addition and Subtraction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Error/Overflow Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Multiplication and Division . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Mixed Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operations with Grand Total Register
SPECIAL FUNCTIONS
Add Mode Calculations
Fixed Point Calculations
Multiplication and Division by a Constant
Percent Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
SERVICE INFORMATION . . . . . . .
Printing Paper Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Printhead Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
In
Case of Difficulty
Calculator Exchange Centers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
If
You
Need Service Information
APPENDIX
Conversion Factors
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Inside Back Cover
Page
11
13
15
15
16
17
23
27
28
USE ONLY TEXAS INSTRUMENTS TP-20225 OR TP-27225 THERMAL
PRINTING PAPER. OTHER PAPER MAY DAMAGE CALCULATOR AND
VOID WARRANTY.
IMPORTANT: Dim or partial printing may be remedied with the PRINTHEAD
CLEANING procedure on page 26 of manual.
IMPORTANT
Record the serial number from the bottom of the
calculator and purchase date in the space below. The
serial number is identified by the words "SERIAL NO."
on the bottom case. Always reference this information in
any correspondence.
Tl-5015
Model No. Serial No.
Copyright@ 1977, Texas Instruments Incorporated
Purchase Date
INTRODUCTION
This electronic desk-top printing calculator provides a high degree of
versatility and performance. Its unique construction is made possible by the
whisper-quiet, electronic printer (no ribbon) and reliable integrated circuits
pioneered by Texas instruments. The convenience of the calculator is
accented by its easy-to-use keyboard, independent add register, grand total
register and many other features. Like all other products manufactured by
Texas Instruments, this calculator has been designed and built to provide
you with years of dependable service.
FEATURES
independent
entry sequence of standard business machines. Perform multiplication and
division without affecting previous add/subtract entries.
Grand
register. When the Grand Total is printed, this register is cleared and the
grand total
an accumulator for add/subtract totals.
Light
Weight-
work or at home.
Electronic
Texas Instruments prints up to
Repeat
be entered as many times as you need by sequentially pressing an
operation key (
Add
Mode - For easy entry of dollars and cents, select add mode for
automatic decimal positioning at two places or select floating point for
maximum accuracy.
Fixed
Point
is selectable via keyboard entry.
Non-Add
calculations.
Percent
discounts and other problems.
Automatic
without reentering numbers.
Keyboard
calculator
Two-Key Roll-Over - Lets you press a second key even before the
previously pressed key is released.
Add
Register
Total
Register
is
placed
in
Weighs less than
Printer
Entry
Operation
Key-
Constant
- Quiet, smooth-running electronic printer developed by
- Once a number has been keyed into the calculator, it can
+,
--).
Operation
Permits easy calculation of percentages for add-on, taxes,
- Addition and subtraction with the familiar
- Automatically accumulates totals from the add
the entry register for further calculations. Serves as
2V2
pounds for convenient operation at
10
digits plus audit trail.
- A fixed decimal point (from 1 to 9 decimal places)
- Prints reference numbers without affecting
- Multiplication and division by a constant number
Buffering - Enter additional numbers and functions while
is
still printing.
ELECTRONIC PRINTER OPERATION
The paper used by the electronic printer is a heat-sensitive (thermal) paper
(Texas Instruments TP-20225 or TP-27225). The only mechanical part of the
printer is a precision stepper motor which advances the paper past the
electronic printhead that is stationary. When printing, small semiconductor
(solid-state) elements are heated very quickly by electronic circuits and
produce color spots on the thermal paper. These spots form the numbers
and symbols you can read on the thermal paper.
does
not
Since the printer is basically an electronic device, it
ink ribbons or special maintenance. Using metal probes, sharp objects
lubricants may damage
Service Information section of this manual for paper replacement
instructions and actions to take if a difficulty occurs.
THE PRINTING ON THERMAL PAPER MAY FADE IF
EXPOSED TO LIGHT OR HIGH TEMPERATURES FOR
LONG PERIODS OF TIME. FOR PERMANENT
STORAGE,
FROM LIGHT AND
the
printhead or rubber roller. Please refer to
NOTICE
Al
'NAYS
FILE PRINTED TAPES AWAY
HEAT.
require special
or
2
BASIC OPERATIONS
This desk-top printing calculator is quite simple
probably already used most of the functions successfully. However, there
are many valuable features of the calculator which are not obvious when
looking at the keyboard. The following descriptions and examples will assist
you in learning the detailed operation of your calculator.
INITIAL OPERATION
The calculator should be connected to 115 Vac/60Hz electrical outlet before
operating.
The power switch is located on the right side of the calculator. Push the
switch toward the rear of the calculator to apply power. Each time the power
switch is turned on, the calculator prints 0. T to indicate it is cleared and
ready for operation.
A paper advance
between problems or for tearing off the paper after completing a problem.
ADDITION
Numbers are keyed into the calculator in the same left-to-right sequence
that you read them. Addition and subtraction entries are made with the same
rapid-entry style as most standard business machines. A unique feature of
the calculator is that addition and subtraction entries are kept separate from
multiplication and division entries within the calculator. This feature is
made possible
accumulates totals from the add register and serves as a memory for add
register totals. Detailed examples of these features are shown in
Calculations.
The following keys are used to perform simple addition and subtraction:
Add
Key[±]
independent add register. A
added.
key[]]
AND
by
the independent add register. The grand total register
-Adds
allows you to run out extra paper to create space
SUBTRACTION
the last entered number or the last printed result to the
"+"
symbol is printed to the right
Subtract Key G - Subtracts the last entered number or the last printed
result from the independent add register. A " - " symbol is printed
of the number subtracted.
Non-add/Subtotal Key M - When used immediately following a number
entry, the entered number is printed with
the number. These numbers are for labeling only and are not entered into
the independent add register or the grand total register and
calculation in progress. When the key is used immediately following a
function
with an
independent add register and grand total register are not affected
Mkey.
key,
the present subtotal
"S"
symbol printed to the right of this subtotal. The contents
of
the independent add register is printed
the"#"
to
operate.
symbol printed to the left of
You
have
Mixed
of
the number
to
do
not affect the
by
the right
of
the
the
3
Total or Grand Total Key ~ - A single press of this key prints the total of
the independent add register with the
total. This total is also placed
~
register. The
key also clears the independent add register so that the
in
"T" symbol printed to the right of the
the entry register and the grand total
calculator is ready for new addition and subtraction entries. A second
consecutive press of the
~key
from the independent add register with a
grand total register and places the.grand total (GT)
prints the accumulated sum of all totals
"G"
symbol on the right, clears the
in
the entry register for
further use if needed. The GT register accumulates totals from the
independent add register only when
Operations with Grand
Clear/Clear-Entry
Total
Key~
Register for example.
-When
the~
key is pressed. (See
used immediately following a number
entry, this key will clear the entered number and allow another number to be
in
entered
its place without affecting the independent add register or the
grand total register. Note that this key will not clear the independent add
register or the grand total register. Pressing
the independent add register after the total is printed.
~once,
Pressing~
automatically clears
a second
time will cause the contents of the grand total (GT) register to be printed and
the GT register to be cleared. See
explanation of the
~
key.
Multiplication
The decimal point key is used wherever it appears
and
Division for further
in
a number. When the
decimal is not entered, the calculator automatically prints the decimal point
to the right of the last number entered
Example: 5.67 + 6
= 11.67
when[±]
or G is pressed.
Enter Press Print
Set power switch to
5.67
6
After
the~
key is used, a new problem can be entered without manually
ON
[±]
[±]
~
O.T
5.67+
6.+
11.67T
clearing the independent add register.
When a total is negative, a minus sign appears to the left of the total.
Example:
-8 + 3.21
Enter Press
a G
3.21
4.6
- 4.6 =
-9.39
Print
8.-
3.21+
4.6-
-9.39T
4
The repeat add/subtract feature of the calculator allows you to repetitively
add or subtract the same number without reentering the number.
Example: 4.59 + 4.59 + 4.59 - 6 - 6
Enter Press
4.59
6 G
[:±]
[:±]
[:±]
G
ill@ 1.77T
A subtotal is desirable when you wish to obtain intermediate and final
results.
Example: 1.064 - .018
1.064 - .018 + 1.19
Enter
1.064
.018
= 1.046
Press
[:±]
G
M
1.19
When used immediately following a number entry, the M key will cause the
number
Example: A listing shows a certain rating number for six different items. Find
the total rating of item number
tQ.be
printed without affecting the calculation.
[:±]
ill@
1,
= 2.236
4 and
=
1.
77
Print
4.59+
4.59+
4.59+
6.-
6.-
Print
1.064+
0.018-
1.0468
1.19+
2.236T
6.
Item No. Rating No.
1 17 4 76
2 8.5 5
3
Enter Press Print
1
17 [:±]
4
76
6
34
45 6 34
M
M
[:±]
M
[:±]
ill@
Item No. Rating
#1.
17.+
#4.
76+
#6.
34.+
127.T
5
No.
14.5
Occasionally, you may catch yourself entering an incorrect number or even
decide the number you keyed
key can be used to clear the unwanted entry.
Example: 49.01 + 16.55 + 4.9
in
is not wanted. When this happens,
= 70.46
the~
Enter Press Print
49.01
16.555
16.55
4.9
Unwanted entries can also be effectively eliminated from the total value after
ITJ or G operation by simply using the opposite operation to cancel
the
the effect of the unwanted entry.
Example: 49.01 + 16.55 + 4.9
Enter Press Print
49.01
16.555
rn
~
rn
rn
~
rn
rn
G
16.55
4.9
If you accidentally
reentered into the independent add register with
remember that each total
Example: 156 + 65 + 320
rn
rn
~
use~
Enter Press Print
156
65
49.01+
16.55+
4.9+
70.46T Total
= 70.46
49.01+
16.555+
16.555-
16.55+
4.9+
70.46T
when you intended to
"T"
is summed to the grand total register.
=
541
rn
rn
~
rn
320
If you frequently perform calculations involving dollars and cents, you may
wish to use the convenient add mode feature of the calculator described
in
this manual.
later
rn
~
Comments
Remove incorrect entry
Enter correct value
Comments
Faulty value entered
Faulty value removed
Correct value entered
Total
useM,
the[±]
156.+
65.+
221.T
221.+
320.+
541.T
the total is easily
key.
However,
6
ERROR/OVERFLOW CONDITIONS
You
can enter up to 10 digits into the calculator. If you enter
an
digits,
11
have been entered, they are accepted as part of the new entry. When this
occurs, press 1
without affecting previous entries.
Example: 123456. 7899 + 555765.4321
A register overflow will also cause ERROR to be printed. If the accumulated
contents of the add registers are larger than 9999999999
-999999999
contents of that register are automatically cleared.
Example: 9,999,999,999 + 1
entry overflow occurs which causes the calculator to clear the first
digits entered and print ERROR. However, if the 12th, 13th, etc., digits
™ and you can reenter a number that has 10 or less digits
= 679222.222
Enter Press
123456.7899
5555765.4321 ERROR
1
555765.4321
(9 digits for negative results), ERROR
rn
™
rn
[!fill
Print Comments
123456.7899+
555765.4321 +
679222.222T Total
= Overflow
11
or more
11
digits entered
Clear for new value
Correct value entered
(1
O digits) or
Tis
printed and the
Enter
9999999999
1
If grand total overflow occurs, the calculator prints ERROR G, skips a line
and clears the grand total register. The independent add register and entry
register are also cleared for a new problem to be entered.
Enter Press Print
3333333333
4444444444
5555555555
The calculator uses
results. This means that an internal result of
-999999999.
addition, the round off operation occurs with each entry. If the value 0.4 is
added to 5555555555, the internal result is rounded off immediately to
5555555555 again as if the 0.4 were never entered.
5/4
However,
Press
rn
rn
rn
[!fill
rn
[!fill
rn
[!fill
round off for 10-digit positive or 9-digit negative
-999999999.5
7
Print
9999999999.+
1.+
ERRORT
3333333333.+
3333333333.T
4444444444.+
4444444444. T
5555555555. +
5555555555.T
ERRORG
-999999999.4
will round up causing an overflow. In
will round off to
MULTIPLICATION
Now that you are familiar with the addition and subtraction keys on the
keyboard, the multiplication and division at the top of the keyboard will be
described.
Keep in mind that multiplication and division operations are independent of
addition and subtraction. The summing of a column of numbers can be in
progress
performed without affecting the summing operation. See
for further explanation and examples.
The four basic keys concerned with multiplication and division are:
Multiply
be printed
number.
Divide
to be printed
number. Division by zero is invalid and will cause ERROR to be printed.
Equals
following multiplication or division, the last entered or printed number is
printed as the multiplier or divisor with an
the number. Then the result is printed with no symbol to the right.
and
Key
00
as
the multiplicand with a
Key
e±::I
as
Key[~
Clear/Clear-Entry Key
entry, this key will clear the entered number and allow another number to be
entered in its place without affecting previous entries. When used following a
00
or
G:J
entry, or pressed twice after a number entry, a
printed to indicate that the multiplication or division problem has been
cleared and the calculator is ready for entry of a new problem. In mixed
calculations, this key will not clear the independent add register or grand
total register.
Multiplication and division problems are quite simple to solve since most
problems may be entered in the same order they are written.
Example: 24.3 x 15
Enter Press
24.3
15
Example: 130
Enter
130
6.5
Notice that it is not necessary to press
new problem when
AND
DIVISION
an
intermediate calculation involving
00,
e±::I
and[§]
Mixed Calculations
can be
- Causes the last entered number or last printed result to
"x"
symbol printed to the right of the
- Causes the last entered number or the last printed result
the dividend with
- Completes multiplication or division. When used
@lg~
= 364.5
..,._
6.5 = 20
the[§]
a"+"
symbol printed to the right of the
"="
symbol printed to the right of
- When used immediately following a number
"C"
symbol is
Print
00
[§]
24.3x
15.=
364.5
Print
130-;-
6.5=
20.
[CZ"~
after a problem before starting a
key is used.
8
Example: 120 x
The result of one problem can easily be picked up as
problem without entering the result.
Example: 120 x
When
an
that entry in the same manner shown for addition and subtraction.
Example: 16 + 5 x 32 = 102.4
Enter Press Print
16
6
5
32 8
The
@zc:EJ
problems. If at some point
even start a new problem, simply
entry) and the calculator will print a
new problem. The
add register or grand total register used for addition and subtraction.
Example: 5.9 x 13.6
key will also act as a clear key for multiplication and division
50
30 = 200
Enter
120
50
30
Enter
120
50
50
= 6000 6000 + 30 = 200
Press
[)<]
r:±J
8
Press
[K)
[:=_]
C:+:J
30
erroneous number entry is made, the
G:J
[§]
00
[§]
in
key does
+(start
8
16.+
5.x
32.=
102.4
a problem you decide to reenter the problem or
press[§]
"C"
not
affect the contents of the independent
new problem)
once (or twice after a number
symbol indicating it is ready to start a
Print
120.x
50.+
30.=
200.
an
entry to another
Print
120.x
50.=
6000.
6000.+
30.=
200.
~El
key may be used to clear
Comments
Remove incorrect entry
Enter correct value
39 + 12.5 = 3.12
Enter
5.9
13.6
39
12.5
Press\
[K)
[±]
[C2_Ci]
[±]
8
Print
5.9.x
13.6+
c
39.+
12.5=
3.12
9
If
you decide to start a new problem immediately after a number entry, the
[Slci]
key must be pressed twice. The first
and a second
Example: 5.9 13.6 (start new problem)
Another method to terminate a multiplication or division problem is to press
[~
and begin the new problem. While this method is simple, if the printed
paper tape is saved for reference purposes, there is
the problem was not completely entered.
Negative numbers cannot be directly keyed into the calculator in
multiplication and division problems. A number can be assigned a negative
value as
number can contain as many
rz.;:•1
clears the pending calculation.
39-;- 12.5 = 3.12
Enter Press
5.9
13.6
39
12.5
an
[xJ
[t;C:~
@Z"_CEj
li=J
[=:J
entry to or result of the independent add register. A negative
Print
5.9x
39.7
12.5=
3.12
as
9 digits before overflow will occur.
c
~2cEI
clears the number entry only
Comments
Clears number 13.6
Clears pending
New problem total
no
clear indication that
5.9x
Example:
11.32 x
Enter
11.32
6
5.04
(-6) x (-5.04)
Press
Print
[5<1
G
[Itc;TJ
00
G
[r@
[.§:]
342.3168
= 342.3168
11.32x
6.-
-6.T
-6.x
5.04-
-5.04T
-5.04=
10
Comments
1st Multiplier
2nd Multiplier
3rd Multiplier
Decimal fraction results (results with digits to the right of the decimal point)
that exceed
larger. Negative results are rounded to
10
digits are automatically rounded up one if the 11th digit is 5 or
9 digits in the same manner.
Example: 5
An entered number or printed result can easily be squared without
reentering the number.
Example: 125 x 125 = 15625
Multiplication and division overflow conditions are similar to the addition and
subtraction overflow conditions in that more than 10 digits in an intermediate
or final result will cause ERROR to be printed and the calculator to be
automatically reset for entry of a new problem. An entry overflow will also
cause ERROR to be printed and the sequence
continue without affecting previous entries. As in addition and subtraction, a
negative result cannot be larger than
+ 3 = 1.6666666666 ..... .
Enter
5
3
Enter
125
Press
[±]
§
Press
00
§
Print
1.
666666667
Print
125.x
125.=
15625.
[I]
-999999999.
5.+
3.=
™ should be used to
(9
digits).
MIXED CALCULATIONS
The previous descriptions have not considered problems that require a
combination of addition, subtraction, multiplication and division. Besides the
differences in entry methods, it is very important to remember that the
calculator internally keeps the results of multiplication and division entries
separate from addition and subtraction entries as if there are two calculators
in
one. The first example illustrates an addition and a multiplication problem
which uses the same numbers without a number being entered twice. Notice
that the calculator provides two results as if two different problems were
entered separately.
Examples: 12
Enter
12
15
+ 15 = 27, 12 x 15 = 180
Press
rn
00
rn
§
Print
12.+
12.x
15.+
15.=
180.
27.T
11
Comments
1 st Add entry
1st Multiply entry
2nd Add entry
2nd Multiply entry
Multiplication result
Addition result
The value of the independent operations can be realized when you begin
solving mixed or complex calculations. Many of the following examples
would require a memory to store intermediate results if the calculator did not
have this independent processing capability.
Sum of Products
Example: 4 x 11.99 = 47.96
6 x 2.97 = 17.82
12x
0.98=
11.76
Total
77.54
Enter Press
4
11.99
6
2.97
12
.98
Sum of Quotients
Example:
1.98_4.98=
4 8
CKJ
@]
IT]
CKJ
@]
IT]
CKJ
@]
-0.1275
Print
4.x
11.99=
47.96
47.96+
6.x
2.97=
17.82
17.82+
12.x
0.98=
11.76
11.76+
77.54T
Enter Press
1.98
4
[±]
@]
IT]
4.98
8
[±]
@]
G
~
Print
1.98+
4.=
0.495
0.495+
4.98+
8.=
0.6225
0.6225-
-0.1275T
12
Product
Example:
of
Sums
(2
+ 3) x (4 + 5) = 45
Enter
2
3
Press
[±]
[±]
[!ili]
00
4
5
Product/Quotient
7 + 5
Example: <
3-12
Enter
7
) x
5
of
<
Sums
6 -4
[±]
[±]
[!ili]
@]
) +
-2.66666667
Press
[±]
[±]
[!ili]
00
6
4
3
12
OPERATIONS WITH
The independent add register allows you to perform mixed calculations as·
in
discussed
memory for add/subtract totals. A single press of the
calculator to print the total of all add/subtract entries with a
printed to the right of the total and places this total
second consecutive press of the [!ili] key prints the accumulated sum of all
totals from the independent add register. The symbol
right of this grand total and it is placed
calculations.
Remember to press [!ili] until
using the grand total register.
the preceding section. The grand total (GT) register serves as a
A third press prints
[±]
G
[!ili]
[±]
[±]
G
[!ili]
@]
GRAND
"G"
TOTAL REGISTER
in
O.T.
is printed before starting a problem set
Print
2.+
3.+
5.T
5.x
4.+
5.+
9.T
9.=
45.
Print
7.+
5.+
12.T
12.x
6.+
4.-
2.T
2.+
3.+
12.-
-9.T
-9.=
- 2.66666667
[!ili] key causes the
in
the entry register for possible further
''T" symbol
the GT register. A
"G"
is printed to the
13
Example: 12.3 + 4.56 = 16.86
21.34
+
12.34 + 12.34 + 12.34 + 12.34
17.1+0.12+1.234-~
Grand Total =
~
39.794
49.36
106.014
Enter
Press
@GT
I
[!m] *
[!lQ!]
12.3
4.56
[.±]
[]]
[r"illJ
21.34
17.1
.12
1.234
12.34
[+]
["f
J
[~]
[±]
[!!"0]
[±]
[±]
[+_]
CTI
@i;r]
[TiG!J
*Additional key entries for illustration only, calculator is ready for new
add/subtract grand total problems when
The
[i'!_~T]
you have completed a series of mixed calculations. When you finally press
the
independent add register. Only two simple facts must be kept in mind to
implement mixed calculations:
For example, if you key
Products and Sum
total of both problems will be printed: 77.54 +
key allows you to find the grand total of all add/subtract entries after
[TJGrJ
key twice, the calculator prints the grand total
1) The add register
keys. (Pressing the
2) The contents of the add register are always available as an entry after
a subtotal or total operation by simply pressing one of the function
keys[+
J,
- [ )(],
of
Print
112.3725G
O.T
*
O.G
12.3+
4.56+
16.86T
21.34+
17.1+
0.12+
1.234+
39.794T
12.34+
12.34+
12.34+
12.34+
49.36T
106.0i4G
is
affected only by
[_T1Gi!
key clears the add register to zero.)
or[±:].
in
the previous example problems entitled Sum
Quotients exactly as shown, then press
Comments
Previous grand total
Add register cleared
Grand total cleared
Simple addition
First total
Second total
Third total
Grand total
"G"
is printed.
the[+
J,
l=],
(-0.1275)
of
all totals from the
and [i!]I] function
[f1Gr!,
the
= 77A125G.
of
14
SPECIAL FUNCTIONS
ADD MODE CALCULATIONS
All operations up to this point have been in the floating mode where the
decimal point "floats" to its proper position. The add mode feature of the
calculator rounds all entries to two decimal places.
calculations involve dollars and cents.
Floating/ Add Mode Key
add mode and floating mode. The calculator is in the floating mode when the
power switch is turned on and pressing the
mode. Pressing
In
the add mode, number entries followed
entered with the decimal point positioned two places to the left of the last
digit of each number entry. Therefore, dollars and cents may be entered
without using the decimal point
Example: $5.23 + $17.00 - $0.75 = $21.48
[@
[@-Each
again, returns the calculator to the floating mode.
key.
use of this key alternately selects the
[@
by[±]
It is convenient when
key one time selects add
, G , are automatically
Enter Press
[@
523
1700
75
If you do not know which mode has been selected, press [fil!]. If
printed, the calculator is in the add mode. If
the floating (normal) mode.
The decimal point key may be used to override the add mode for individual
entries. If more than two digits are entered after the decimal point entry, the
number is rounded to two decimal places when summed or subtracted. ·
Example: $3.133 + $0.005 + $4.56
Enter
3.133
.005
456
[±]
[±]
G
[fil!]
Press Print
[fil!]
[fil!]
[±]
[±]
[±]
[fil!]
21.48G
O.OOT
3.13+ 3.133 truncated to 3.13
0.01+
4.56+
7.70T
Print
5.23+
17.00+
0.75-
21.48T
O.T
is printed, the calculator is in
= $7.698 = $7.70
Comments
Previous grand total
Check for add mode
.005 rounded to
Normal entry
Add mode total
O.OOT
.01
is
15
Multiplication and division entries are not affected by add mode, but results
are always rounded to two decimal places.
Example: 1.556 x 3.21 + 56.113 = .0890125283 = .09
Enter
1.556
3.21
56.113
Press Print
ill@
ill@
00
[±]
@]
7.70G
0.00T
1.556x
3.21+
56.113=
0.09
FIXED POINT CALCULATIONS
Another feature of the
places (from Oto 9) to print when working a problem. Pressing the following
sequence of keys puts the calculator in the Selected Decimal Mode, where
"N"
is the desired number of decimal places:
To
return to floating mode simply press [fZfil, just as you would to change
from the add mode to floating mode. The following is an example of various
calculations in the selected decimal mode.
Enter Press Print
1
5
12
2
3
13.25
5
1.15
[fZfil
ill@
rn
rn
ill@
00
[±]
@]
rn
[±]
@]
[fZfil
rn
ill@
[fZfil
key allows you to select any number of decimal
[fZfil
-+ N -+
0.0
5.0+
12.0+
17.0T
17.X
2.+
3.=
11.3
13.3+
13.3+
5.=
2.7
1.15+
14.45T
ill@
Comments
Calculator powers up
in floating mode.
Fixed point 1
Total
The previous total
can be used for further
calculations by pressing
the desired function
Rounded to 1 decimal place
The number entered is
rounded to 1 decimal place.
Rounded to 1 decimal place.
Return to floating mode
Total
key.
16
MULTIPLICATION
The calculator has
00
or[±]
entry and the composite multiplicand for multiplication or the
divisor for division. The constant register has no effect
calculations as described thus far in the manual. Once the constant is
stored, the calculator is designed to look for the sequence of a number entry
followed by equals. When this sequence is used, the calculator uses the
number and function
The constant number is automatically replaced when a new problem is
entered or when
For simple calculations, the first entry is the constant number in
multiplication and the second entry is the constant number in division.
Example: 5 x 3 = 15.5, 5 x 4 = 20, 5 x 0.95 = 4.75
Enter Press Print Comments
5
3
4
.95
AND
DIVISION
an
automatic constant register which will retain the last
in
the constant register to complete the calculation.
1§i1
is used to clear the problem (a
00
El
15. 5 x 3 evaluated
El
20. 5 x 4 evaluated
El
0.95=
4.75 5 x .95 evaluated
BY
A CONSTANT
on
normal
"C"
is printed).
5.
x 5 x stored as constant
3.=
4.=
Example: 100 + 3 = 33.33333333, 18 + 3 =
Enter Press Print Comments
100
3
18
4.7
[±]
El
El
El
100.+
3.=
33.33333333 100 + 3 evaluated
18.=
6.
4.7=
1.566666667
17
6,
4.7 + 3 = 1.566666667
+ 3 stored as constant
18 + 3 evaluated
4.
7 + 3 evaluated
Since the divisor
be read directly from the paper tape. However,
number may actually be
The key sequence
printed.
Example: Determine the constant value after solving the following problem.
in
division becomes the constant, the division constant can
an
intermediate result that has not been printed.
[J]
@]
will cause the multiplication constant value to be
36 x 4.5 + 12 x 6 =
81
in
multiplication the constant
Enter
36
4.5
12
6
1
The constant value is the composite result of the first three entries:
36 x 4.5 + 12 = 13.5.
The automatic constant allows
reciprocal) without reentering numbers. The key sequence to calculate the
an
reciprocal of
Example:
entered number or the last printed result
_1_
= 0.05
8+
12
Enter Press
~
8
12
m
m
~
[±]
@]
@]
Press
00
[±]
00
@]
@]
an
entry or result to be divided into one (a
Print
O.T
8.+
12.+
20.T
20.+
20.=
1.
1.=
0.05
Print
36.x
4.5+
12.x
6.=
81.
1.=
13.5
is[±]
@]
Comments
8 + 12 evaluated
+ 20 stored as constant
20
20 +
1 +
evaluated
20
evaluated
@].
18
The reciprocal sequence is such that you can also use it to divide a printed
result into another number.
-=
Example: ... 6 _
1.5 x 3
L333333333
Enter
1.5
3
Press
iXJ
-
-
Print
1.5x
3.=
4.5
Comments
3 x 5 evaluated
4.5-:-
=]
6
:~
4.5=
1.
6.~
4.
5 stored as constant
4.5
.,.
4.5 evaluated
Replace i with 6
1.333333333
The repetitive use of the reciprocal key sequence to obtain the original entry
may result in an error in the right-most digit. This is due to the normal
rounding process in the calculator.
-1
~
Example:
.0222222222
45
- - . 1
.0222222222
..
--
Enter
45
-=
45.00000005
Press
Print
45.-:-
45.~
1.
1
::::::1
.....
. 0222222222
[='l
.0222222222
. 0222222222
..,..
~
1.
1.=
45.00000005
19
PERCENT CALCULATION
The percent key can be a time-saver when calculating percentages,
add-ons, discounts or ratios.
Percent
number entered or the last printed number to be used by the calculator as a
percent value and prints a
immediately prints the percentage result. When following division, this key
completes the division, automatically multiplies the result by 100 and prints
the result with
Percent
percentage is calculated and printed followed by the sum of the percentage
and the principal amount printed with
Percent
percentage is calculated and printed followed by the difference between the
percentage and the principal amount printed with a
Percentages
Example: 4% of 453
Key~;;;]
Add-on
Discount@~
-When
a"%"
[y~]
to the right.
[
+]
[
_....:J
~c
i 8.12
Enter
453
4
following multiplication, this key causes the last
"%"
symbol to the right of the number and
- When used following multiplication, the
an
"A" symbol to the right.
- When used following multiplication, the
"D" symbol to the right.
Press
LXJ
Print
453.x
4.%
18.12
Example: (17 + 32 -
Enter
17
32
8
15
8)
x 15% = 6.15
Press
r-~f]
[~]
[Tl~Tj
ixJ
0
[
i_o]
Print
17.+
32.+
8.-
41.T
41.X
15.%
6.15
The automatic constant can also be used with percentage calculations.
Example: Find 2%, 15%, and 25% of 495.
Enter
Press
495 [KJ
2
[~o]
Print
495.x
2.%
9.9
15
15.%
74.25
25
25.%
123.75
20
Percentage
Following a percentage calculation with the
adds or subtracts the percentage from the principal amount. The principal
amount is the entered number or intermediate result when the last
pressed.
Example:
Add-on
1450
Enter
1450
15
+ 15%
or
Discount
add-on=
Press
CXJ
@iJ
[i]
i667.5
[+l
or l -1 key automatically
Print
1450.x
15.%
217.5
1667.5A
D<l
was
Example:
Example: 129.95 -
69.95
Enter
69.95
10
Enter
129.95
25
- 10%
5
discount=
25%
discount+
Press
l~J
~~
Press
00
CoLil
c::J
[x]
lOZil
[::±]
62.955
5%
tax=
Print
69.95x
10.%
6.995
62.9550
102.335625
Print
i29.95x
25.%
32.4875
97.46250
97.4625x
5.%
4.873125
102.335625A
21
For maximum accuracy, use the floating mode for percent, add-on and
discount calculations. In the add mode, intermediate results are
and this rounded value is used for subsequent calculations. Any result can
be rounded to two decimal places with the following key sequence:
[@0018[@
rounded
Percentage Ratios
When the percent key is used to complete a division problem, the calculator
automatically multiplies the result by 100 and prints the result as a percent
value.
Example: 750 is what percent of 1000?
Enter Press
750
[:t]
1000
Example: 29.5 is what percent of 25?
· Enter Press
29.5
[:t]
25
Print
750.-;-
1000.=
75%
Print
29.5-;-
25.=
118.%
22
SERVICE INFORMATION
PRINTING PAPER REPLACEMENT
A roll of thermal printing paper was included with your Tl-5015 calculator.
When you near the end of the roll, a continuous stripe will appear to the right
of
the printout to indicate that there are approximately ten feet of paper left
the roll.
sufficient printing paper remains to complete your calculations.
When
TP-20225
may
obtained at the store where your Tl-5015 was purchased.
is temporarily out of paper, you may order it from Texas Instruments Service
Facility,
Follow these steps to install new paper:
1. Lift the old roll
As
you continue operating the calculator, check to make sure that
replacing
damage
P.O.
separate the end of the roll from the paper remaining in the printing
mechanism.
the
paper
in
your
Tl-5015,
or
TP 27225
your
Box 53, Lubbock, Texas 79408.
thermal
calculator
of
paper from the calculator and cut or tear the paper to
printing
and
void
use
only
Texas
Instruments
paper.
Other
thermal
the
warranty. New paper may be
STRIPE
papers
If your local store
in
23
2.
Place the new roll of paper behind the calculator so that the paper unrolls
from the bottom of the spindle. If there is paper remaining in the printer,
3.
use this step to install paper and skip step
3.
step
Insert the end of the new paper between the rubber drum and the
remaining paper as shown. Press
and the old piece of paper is completely out of the printer.
PAPER
FROM OLD ROLL
[_j]
Otherwise, proceed with
until the new paper is in position
3.
Use this step to install paper when a piece of paper is NOT remaining in
the printer.
insert the end of the new roll between the rubber drum and the rounded
portion of the paper cradle. Using the fingertips of your left hand, gently
24
press the paper against the back of the rubber drum and press until
paper is in position for printing.
4.
Place the new roll of paper back into the paper cradle to complete paper
installation.
25
PRINTHEAD CLEANING
Occasionally, foreign particles may become trapped between the printhead
and the paper which causes partial or
basically
special maintenance other than periodic head cleaning.
probes, sharp objects
rubber roller.
The following procedure is recommended for cleaning theprinthead when a
printing difficulty occurs and before installing each new
an
electronic device, it does not require special ink ribbons or
or
lubricants as they may damage the printhead
Printhead Cleaning Procedure
1.
Remove paper
2.
Cut a 2-inch by 8-inch strip of standard bond typing paper or use the
Head Cleaning Card furnished with the calculator.
3.
Install the paper in the calculator the same way described for loading
thermal paper.
4.
With the calculator power switch turned on:
Press
Press[+]
Press§
The abrasive action of the bond paper cleans the printhead as indicated
by the faint blue printing on the paper.
5.
Reinstall the thermal paper as described in steps 2 or 3 on page 24 and
proceed normally.
as
directed
U!l ten times
[TJ
[o~
ten times
on
dim.
page 23.
printing.
Sinc.e
the printer is
Do not use metal
ro11
of printing paper.
or
26
IN
CASE
1. Check to be sure the power switch is in the ON position and that the
power cord is plugged into an operating 115
2.
Review the operating instructions to be certain calculations have been
performed in
may result in incorrect calculations.
3.
Set the
calculator should print
4. If partial printing occurs or the printing becomes dim, foreign particles
may
Printhead Cleaning Procedure to remove these particles.
instances
If none of the
PREPAID and
back cover.
NOTE:
United States parcel post shipments only. If you desire to use another
carrier, the street address is:
For your protection, the calculator must
cannot assume any responsibility for loss
shipments.
Please include information on the difficulty experienced with the calculator,
as well as return address information including name, address, city, state
and zip code. The shipment should be carefully packaged and adequately
protected against shock and rough handling.
OF DIFFICULTY
Vac/60Hz
the
manner described in this book. Improper key sequences
power
switch to OFF for 10 seconds then turn it on again. The
be lodged between the printhead and the paper. Follow the
may
require repeating this procedure several times.
above
INSURED
The
P.O.
box
Texas
Instruments
2305
University
Lubbock,
Q.T.
Try
the calculation again.
procedures corrects the difficulty, return the calculator
to the applicable SERVICE FACILITY listed on the
number
listed for
the
Lubbock Service Facility is for
Incorporated
Ave.
Texas 79415
be
sent insured; Texas Instruments
of
or damage to uninsured
electrical outlet.
Some
CALCULATOR EXCHANGE CENTERS
If your calculator requires service, instead of returning the unit to a service
facility for repair, you
factory-rebuilt calculator of the
centers which have been established across the United States. A $3.00
charge will be made by the exchange center for in-warranty exchanges.
Out-of-warranty exchanges will be charged at the rates in effect at the time
of the exchange. Please call the
details and the location of the nearest exchange center.
may
elect to exchange the calculator for a
SAME
MODEL
Consumer
at one of the exchange
Relations Department for further
27
IF YOU NEED SERVICE INFORMATION
If you need service information for your calculator, write Consumer
Relations at:
Texas
Instruments
P.O.
Box
Lubbock,
or call Consumer Relations at 800-858-1802 (toll-free within all contiguous
United States except Texas) or 800-692-1353 (toll-free within Texas). If
outside contiguous United States call 806-7 4 7-384
cannot accept collect calls at this number.)
THE WARRANTY IS VOID IF THE
ALTERED OR DEFACED.
Texas Instruments reserves the right to make changes in materials and
specifications without notice.
53
Texas 79408
incorporated
IMPORTANT
SERIAL
i.
NUMBER
(We regret that we
HAS
BEEN
28
APPENDIX
CONVERSION FACTORS
English
To
microns
centimeters
meters
meters
kilometers
grams
kilograms
liters
milliliters (cc)
sq. centimeters
sq. meters
sq. meters sq. yards
milliliters (cc)
cu.
cu.
Boldface numbers are exact; others are given to ten significant figures.
Temperature
to
Metric
Conversions
Find
Multiply
mils
inches
feet
yards
miles (stat.)
ounces (av.) 28.34952313
pounds (av.)
gallons (U.S.)
fl. ounces (U.S.) 29.57352956
sq. inches
sq.
feet
By
25.4
2.54
0.3048
0.9144
1.609344
0.45359237
3.
785411784
6.4516
0.09290304
0.83612736
cu.
inches
meters
meters cu. yards 0.7645548580
Conversions
cu.
feet
°F=~
(°C) + 32
16.387064
0.0283168466
5
"C= 5 (°F
- 32)
9
ONE-YEAR LIMITED WARRANTY
WARRANTEE
This Texas Instruments electronic calculator warranty extends to the original
purchaser of the calculator.
WARRANTY DURATION
This Texas Instruments electronic calculator is warranted to the original purchaser for
a period of one
WARRANTY COVERAGE
This Texas Instruments electronic calculator is warranted against defective materials
or workmanship. THIS WARRANTY IS VOID IF: (i) THE CALCULATOR HAS BEEN
DAMAGED
SERVICE OR OTHER CAUSES NOT ARISING OUT OF DEFECTS IN MATERIAL
OR WORKMANSHIP, (ii) THE
DEFACED.
WARRANTY PERFORMANCE
During the above one (1) year warranty period your calculator will either be repaired
or
relaced with a reconditioned model of an equivalent quality (at Tl's option) when
the calculator is returned, postage prepaid and insured,
Service Facility listed below. In the event of replacement with a reconditioned model,
the replacement unit will continue the warranty of the original calculator
whichever is longer. Other than the postage and insurance requirement, no charge
will be made for such repair, adjustment,
WARRANTY DISCLAIMERS
ANY IMPLIED WARRANTIES ARISING OUT OF THIS SALE, INCLUDING
NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED IN DURATION TO THE
ABOVE ONE (1) YEAR PERIOD. TEXAS INSTRUMENTS
FOR LOSS OF USE OF THE CALCULATOR OR OTHER INCIDENTAL OR
CONSEQUENTIAL COSTS, EXPENSES, OR DAMAGES INCURRED
PURCHASER.
states do not
Some
consequential damages, so the above lirpitations
LEGAL REME IES ' .
This warranty gives u specific legal rights, and you may also have other rights that
~from
TEXAS INSTR MENTS CONSUMER SERVICE FACILITIES
Texas
Instruments
P.O.
Box
Lubbock, Texas 79408
onsumers in California
a itional assistance o nformation:
(1)
year from the original purchase date.
BY
ACCIDENT OR UNREASONABLE USE, NEGLECT, IMPROPER
SERIAL
NUMBER HAS BEEN ALTERED OR
to
a Texas Instruments
and/or
replacement.
SHALL
state
2500
allow the exclusion
to
stat .
Servi e Facility
nd
Oregon may contact the following
or
limitation of implied warranties or
or
exclusions may not apply to you.
Texas Instruments Service
41
Shelley Road
Richmond Hill, Ontario, Canada
Texas
Instruments offices for
Texas
Instruments Consumer Service
10700 Southwest Beaverton Highway
Park Plaza
Beaverton, Oregon 97005
(503) 643-6758
West,
Suite
NOT
11
or
90 days,
BUT
BE
LIABLE
BY
THE
Facility
Printed
I'
in
U.S.A.
TEXAS
INSTRUMENTS
INCORPORATED
DALLAS. TEXAS
1015178-1
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