TI BA-35 Solar Quick Reference Manual

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Page 1

BA-35 Solar Quick Reference Guide

Table of Contents

General Information The Display

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Arithmetic Operations Correcting Errors Display Formats Memory Operations Math Operations Percentage Calculations

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Percentage Change Calculations Margin and Markup Calculations Compound Interest Calculations Annuity Calculations Converting to EFF or APR Balance, Interest, and Principal Statistics

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2 4 6 7 8

9 10 12 13 14 16 18 23 24 27

Common Keystroke Sequences Error Conditions In Case of Difficulty

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TI Product Service and Warranty

Information

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30 35 37

Page 2

General Information

Turning the Calculator On and Off

(All Clear/On)

This key also clears the display, all pending operations, and values in memory or the mode registers.

The calculator turns off automatically when the solar cell panel is no longer exposed to light.

Modes

The calculator can operate in three different modes. Setting the calculator to a particular mode prepares it to perform special functions.

—Turns on the calculator.

The available modes are statistics, financial, and profit margin.

Indicators in the display tell you the calculator's current mode. STAT displays for statistics, FIN for financial. No indicator is displayed for profit margin mode.

—Changes the calculator to the next mode in sequence. To set the calculator to a particular mode, press

repeatedly until

the appropriate indicator is displayed. Changing to a new mode clears the contents of

the mode registers. You can do arithmetic, mathematical, and

percentage operations in any mode.

Page 3

Second Functions

—Enables you to

(Second Function)

perform the “second” functions that are marked over some of the keys. To perform a second function, press

and then the appropriate

function key. When you press

2nd

appears in the

display until you press another key. If you press

and then a key that does not

have a second function, the key performs its normal function. If you accidentally press

press it again to cancel its effect.

Clearing the Calculator

—Clears the calculator

(All Clear/On)

completely, including the display, all pending operations, and the memory and mode registers. Pressing

also sets the

calculator to floating-decimal format and

financial mode

(Clear Entry/Clear)

—Clears incorrect entries, error conditions, the display, or pending operations. It does not affect the memory, the mode registers, or the display format.

0 b

—Clears any

(Clear Mode Registers)

values that have been stored in the mode registers.

Note:

Changing to a new mode also clears the

contents of the mode registers.

Page 4

The Display

The display shows a maximum of 10 digits, although the calculator internally retains a maximum

Display Indicators

Indicator Meaning

nd The calculator will access the

of 13 digits.

second function of the next key pressed (appears when you press

FIN The calculator is in the

financial mode.

STAT The calculator is in the

statistics mode.

Note:

No indicator displays when the calculator is in profit margin mode.

Begin The calculator computes

annuities as be

inning-ofperiod payments rather than end-of-period payments. (Displayed only in the financial mode.)

(continued)

Page 5

Indicator Meaning

InDep The displayed result is for

the independent variables (x values). (Displayed only in the statistics mode.)

Dep The displayed result is for

the dependent variables (y values). (Displayed only in the statistics mode.)

prn The value in the display is

the summed principal over a ran

e of payments. (Displayed only in the financial mode.)

prn The value in the display is

the principal for a sin

le payment. (Displayed only in the financial mode.)

int The value in the display is

the summed interest over a ran

e of payments. (Displayed only in the financial mode.)

int The value in the display is

the interest for a sin

le payment. (Displayed only in the financial mode.)

Page 6

Arithmetic Operations

Entering Numbers

- ?

(Digits)

—Enter digits into the display. You can enter a maximum of 10 digits and a decimal point.

(Decimal Point)

(Change Sign)

—Enters a decimal point.

—Changes the sign of the number in the display. To enter a negative number, first enter the number as a positive value and then press

Arithmetic Keys

p, o, n, m

—Perform the arithmetic operations of addition, subtraction, multiplication, and division.

(Equals)

—Completes all pending operations

and displays the result of a calculation.

Page 7

Correcting Errors

Correcting Entry Errors

(Clear Entry/Clear)

—To clear a numerical

entry, press

once; then enter the correct number. To clear all pending operations and begin the calculation again, press

(x Exchange y)

—Exchanges the values

twice.

of x and y. If you enter x and y in the incorrect order, press

to reverse them. Then

complete the calculation.

(Backspace)

—Removes the last digit or decimal point from the displayed number if you have not yet pressed an operation key (p, o,

n, m

, etc.). This key is useful for correcting entry errors without having to clear the display and start again.

Correcting Immediate Functions

You can often correct an immediate function by performing the “reverse” operation. For example, if you press

0 ]

can correct the operation by pressing

by mistake, you

0 k

Page 8

Display Formats

Floating-Decimal Format

The calculator normally displays numbers in “standard” floating-decimal format, in which numbers are displayed in the range

9,999,999,999 to -0.000000001, 0, or

0.000000001 to 9,999,999,999. If the result of a calculation is too large or too small to be displayed in the normal format, it is displayed in scientific notation. This means the result is expressed as a base value (mantissa) times 10 raised to a power (exponent). For example, 5.9

12 means 5.9 x 10 The calculator is always in floating-decimal

format when you turn it on. By changing the display format, you can convert a number from one format to another.

0 c

(Fixed Decimal)

—Enables you to set the number of decimal places displayed in a result.

To set the number of decimal places, press

0 c

and then press the appropriate digit

key (6-?).

To remove the fixed-decimal setting and restore floating-decimal format, press

c A

If a result has more than the selected number of decimal places, the displayed number is rounded. If a result has fewer than the selected number of decimal places, trailing 0s are added.

Page 9

Memory Operations

The memory can store any numeric value within the range of the calculator. You can use the calculator’s memory to store, sum, and recall a numeric value. You can use the memory in any mode.

(Store)

value in the memory, replacing any value previously stored there. When 0 is displayed,

—Stores the displayed numeric

you can clear the memory by pressing

thereby storing a zero in memory.

—Adds the displayed numeric value

(Sum)

to the contents of the memory. To add a series of numbers to the memory, use

to store the first number (thereby replacing

any previous value). Then use remaining numbers. Use

s 0 P

with the

display the total. To subtract the displayed value from the value

in memory, press displayed value) and then press

0 P

s 0 P

to display the total.

(Recall Memory)

(to change the sign of the

. Use

—Displays

(recalls) the number stored in memory, without affecting the contents of the memory.

Page 10

Math Operations

0 \

(Reciprocal)

—Calculates the reciprocal of the displayed number, which is the same as one divided by the number.

0 ]

(Square)

—Raises the displayed number to the second power, which is the same as multiplying the number by itself. The number can be any value whose square is in the range of the calculator.

0 k

(Square Root)

—Calculates the square root of the displayed number. The displayed number must be positive or zero; otherwise, an error condition occurs. The result is always positive.

0 H

(Universal Power)

—Raises any positive number to any power within the range of the calculator or calculates any root of any positive number within the range of the calculator.

To calculate a power:

1. Enter the number (y) that you want to raise

to a power.

2. Press

0 H

3. Enter the power (x).

4. Press l or any key that completes the

operation.

Page 11

To calculate a root:

1. Enter the number (y) whose root you want to

find.

2. Press

0 H

3. Enter the root (x).

4. Press

0 \

5. Press l or any key that completes the

operation.

0 G

(Natural Logarithm)

—Calculates the natural logarithm (base e = 2.718281828459) of the displayed number. The number must be positive; otherwise, an error condition occurs.

0 ^

(Natural Antilogarithm)

— Calculates the natural antilogarithm of the displayed number. This is equivalent to the value of e raised to the power of the number in the display.

Page 12

Percentage Calculations

(Percent)

add-ons, discounts, and percentage ratios.

—Calculate percentages,

Key

Operation

Percentage

dd-On

Discount

Percentage

Sequence Function

n E

Calculates n% of the principal amount.

n E

Calculates n% of the principal amount and adds the result to the principal.

n E

Calculates n% of the principal amount and subtracts the result from the principal.

n E

Divides the

Ratio

principal amount by n%.

Page 13

Percentage Change Calculations

0 4

(Percent Change)

—Calculates the percentage change between two values. To calculate the percentage change:

1. Enter the new value.

2. Press

0 4

3. Enter the old value.

4. Press l. The percentage change is calculated by the

formula: New value - Old value

x 100

Old value

If the result is positive, there is a percentage increase. If the result is negative, there is a percentage decrease.

Page 14

Margin and Markup Calculations

To calculate cost, selling price, gross profit margin, or markup, use

to set the calculator to the profit-margin mode (no display indicator).

(Selling Price) (Margin)

—Enters the cost.

—Enters the selling price.

—Enters the gross profit margin,

(Cost)

which is the difference between selling price and cost expressed as a percentage of the

selling price

(Markup)

0 Z

—Enters the markup, which is the difference between selling price and cost expressed as a percentage of the

cost

If the percentage is positive, the selling price is greater than the cost. If the percentage is negative, the selling price is less than the cost.

—Computes the

(Computation Key)

unknown value for gross profit margin problems and markup problems.

Recalling Values

To recall a value that you have entered or computed, press

and the appropriate key

for the value you want to recall. For example, to recall the value for margin, press

s U

Page 15

Performing Gross Profit Margin Calculations

To calculate cost, selling price, or gross profit margin:

1. Press

use

0 b

to enter the profit margin mode

to clear the registers and

(no display indicator).

2. Enter the two known values (CST, SEL, or

MAR).

3. Press

and the key for the unknown

value.

Performing Markup Calculations

To calculate cost, selling price, or markup:

1. Press

use

0 b

to enter the profit margin mode

to clear the registers and

(no display indicator).

2. Enter the two known values (CST, SEL, or

MU).

3. Press

and the key (or key sequence)

for the unknown value.

Page 16

Compound Interest Calculations

To calculate compound interest, use

set the calculator to the to the financial mode

FIN

(

appears in the display).

In compound interest calculations in which no payment is involved, the payment (PMT) is assumed to be zero. When the payment has a value other than zero, the calculator treats the problem as an annuity (a series of regular, equal payments).

Compound Interest Keys

In compound interest calculations, the following keys are used to enter or calculate the values listed below.

—Total number of compounding periods.

—Percent interest per compounding period.

—Present value of a future amount. With a

savings account, for example, PV represents what your money is worth today.

—Future value of a present amount. With a

savings account, for example, FV represents what your money will be worth in the future.

—Computes the

(Computation Key)

unknown value for compound interest problems

Page 17

Recalling Values

To recall a value that you have entered or computed, press

and the appropriate key

for the value you want to recall. For example, to recall the present value, press

s K

Performing Compound Interest Calculations

To perform a compound interest calculation, you must know any three of the four values (N, %i, PV, or FV). Follow these steps to find the unknown value:

1. Press

use

0 b

to enter the financial mode (

to clear the registers and

FIN

appears in the display).

2. Enter the three known values (N, %i, PV, or

FV).

3. Press

and the key for the unknown

value.

For compound interest calculations, the payment (PMT) must be zero. This value is set automatically when you press

to enter the financial mode or when you clear the financial registers.

Page 18

Annuity Calculations

For annuity calculations, use calculator to financial mode (

FIN

to set the

appears in the

display). An annuity is a series of equal payments made

at regular time periods with interest calculated at the end of each period. Ordinary annuities have end-of-period payments; annuities due have beginning-of-period payments.

0 a

(Beginning-of-Period)

—Sets the calculator to compute for annuity-due problems (beginning-of-period payments).

Pressing

0 a

causes

Begin

to appear in the display. The beginning-of-period function is in effect until you cancel it (by pressing

0 a

again) or leave the financial mode.

When

Begin

is in the display, the calculator

solves using beginning-of-period payments.

When

Begin

is not in the display, the calculator solves using end-of-period payments.

Note:

If an annuity problem does

not

use

beginning-of-period payments, be sure that

Begin

the answer. Having

is not in the display before you compute

Begin

in the display has no effect on compound interest calculations in which no payment is involved.

Page 19

Annuity Keys

In annuity calculations, the following keys are used to enter or calculate the values listed below.

—Total number of payment periods.

—Percent interest per payment period.

—Present value of a series of payments plus

the present value of FV. With a savings account, PV represents an initial deposit (not including the first payment). With a loan, PV represents the loan amount.

—Amount of the regular payment. This value may be positive or negative, depending on the type of problem you are solving (as explained on page 20).

—Future value of a series of payments plus

the future value of PV. With a savings account, FV represents the final amount withdrawn. With a loan, FV represents any balloon payment that must be made in addition to the last regular payment.

(

—Computes the

Computation Key)

unknown value for annuity problems.

When

Begin

is not displayed, the

key computes the unknown value for ordinary annuities (annuities with end-of-period payments).

When

Begin

computes the unknown value for annuities due (annuities with beginning-of-period payments).

is displayed, the

key

Page 20

Annuity Calculations

(Continued)

Recalling Values

To recall a value that you have entered or computed, press

and the appropriate key

for the value you want to recall. For example, to recall the present value, press

s K

Positive or Negative Payments

In annuity problems, the present value and future value are usually positive numbers. The payment amount may be positive or negative, depending on the type of problem you are solving.

If payments are discounted backward, the payment amount is positive. This is the case in mortgage, loan, bond, and lease problems.

These problems have a present value, but they may or may not have a future value. (If there is no future value, FV=0.)

If payments are compounded forward, the payment amount is negative. This is the case in savings problems.

These problems have a future value, but they may or may not have a present value. (If there is no present value, PV=0.)

Page 21

Performing Annuity Calculations

To perform an annuity calculation, you must know any four of the five values (N, % i, PV, PMT, or FV). Follow these steps to find the unknown value:

1. Press use

0 b

to enter the financial mode (

to clear the registers, and

FIN

appears in the display).

2. Ensure that the calculator is set correctly for the type of annuity calculation desired.

For ordinary annuities,

Begin

should not

be displayed.

For annuities due,

Begin

should be

displayed.

Press

0 a

to turn

Begin

on or off.

3. Enter the four known values (N, % i, PV, PMT, or FV).

4. Press

and the key for the unknown

value.

Note:

Generally, solving for the interest rate requires more time than other calculations. If you use unrealistic values, the calculator may take several minutes before indicating an error condition. If this occurs, press

to clear

the calculation.

Page 22

Annuity Calculations

(Continued)

Special Functions for Monthly Compounding or Payment Periods

0 h

(Monthly Interest)

—Divides the number in the display by 12 and displays the result. This number can then be stored as the monthly interest rate (%i). To use the

0 h

key sequence:

1. Enter the annual interest rate for a

compound interest or annuity problem.

2. Press

0 h

Then press

to store the result.

The two steps above have the same effect as entering the number of years and then pressing

12 l.

0 i

(Number of Monthly Payments)

— Multiplies the number in the display by 12 and displays the result. This number can then be stored as the number of compounding periods or payment periods (N). To use the

0 i

key

sequence:

1. Enter the number of years for a compound

interest or annuity problem with monthly compounding or payment periods.

2. Press

0 i

. Then press C to store the result. The two steps above have the same effect as

entering the number of years and then pressing

12 l.

Page 23

Converting to EFF or APR

To convert to EFF or APR, use calculator to the financial mode (

FIN

to set the

appears in

the display.)

Annual Percentage Rate (APR)

—The interest rate per compounding period multiplied by the number of compounding periods per year.

Annual Effective Rate (EFF)

—The interest rate compounded yearly that achieves the same future value as the APR. The EFF is the rate at which you actually earn for the period of time stated.

0 N

(APR to EFF)

—Converts annual

percentage rates to annual effective rates.

1. Enter the APR.

2. Press

0 N

3. Enter the number of compounding periods

per year (c/yr) for the APR.

4. Press

0 O

to calculate the EFF.

(EFF to APR)

—Converts annual

effective rates to annual percentage rates.

1. Enter the EFF.

2. Press

0 O

3. Enter the number of compounding periods

per year (c/yr) for the APR.

4. Press l to calculate the APR.

Page 24

Balance, Interest, and Principal

To calculate balance, interest and principal, use

FIN

(

to set the calculator to the financial mode

appears in the display.)

(Balance)

—Calculates the remaining loan

balance (principal) after a selected payment. To find the balance:

1. If necessary, press

0 a

to change the calculator to solve for end-of-period payments or beginning-of-period payments.

2. Enter the appropriate values with the C,

K, L

, and

keys.

3. Enter the payment number.

4. Press

(Interest and Principal

interest and principal portions of a payment; when used with the

)—Calculates the

single

key, it calculates the accumulated interest and principal over a

(Payment Range Entry Key)

range

of payments.

—Enters a selected range of payments (payment 1 through payment x) so that you can calculate the accumulated interest and principal over that range.

Note:

number as an integer.

When using

, enter the payment

Do not enter a decimal

point.

Page 25

Calculating a Single Payment

To find the interest and principal of a single payment

1. If necessary, press

0 a

to change the calculator to solve for end-of-period payments or beginning-of-period payments.

2. Enter the appropriate values with the C,

K, L

, and

keys.

3. Enter the payment number.

4. Press

to calculate the interest. (The

int

indicator is displayed with the result.)

5. Press

to display the principal. (The

prn

indicator is displayed with the result.)

If you want to display the interest portion again,

press

. Pressing

interest and principal.

alternately displays the

Page 26

Balance, Interest, and Principal

(Cont.)

Calculating a Range of Payments

To find the summed interest and principal over a range of payments:

1. If necessary, press

0 a

to change the calculator to solve for end-of-period payments or beginning-of-period payments.

2. Enter the appropriate values with the C,

K, L

, and

keys.

3. Enter the first payment number (P1) and press

4. Enter the second payment number.

5. Press (The

to calculate the interest.

indicator is displayed with the

int

result.)

6. Press

to display the principal.

(The

prn

indicator is displayed with the

result.)

If you want to display the interest portion again, press

. Pressing

alternately displays the

interest and principal.

Page 27

Statistics

To enter a statistics problem, use

the calculator to the statistics mode (

to set

STAT

appears in the display).

0 b

(Clear Mode Registers

)—Clears any

previously entered data points.

(Statistics Data Entry)

—Enters the displayed number as a data value in the statistical registers. Each time you press

the display shows the number of data values currently stored in the statistical registers.

0 f

(Statistics Data Removal

)— Removes a data value from the statistical registers. Each time you press

0 f

, the display shows the number of data values currently stored in the statistical registers.

Entering Two-Variable Data Values

Use

in conjunction with

to enter data

points with both x and y values as follows:

1. Enter an x value and press

2. Enter a y value and press

Repeat the procedure to enter additional data points. You can also follow this procedure with

0 f

to remove data points.

Page 28

Statistics

Mean

(Continued)

0 z

(Data Mean)

—Calculates the mean (average) of all the data values currently stored in the statistical registers.

If you have entered data points with x and y values, press

0 z

the y values; then press

to display the mean of

to display the

mean of the x values.

Standard Deviation

The

0 y

and

0 x

key sequences calculate the standard deviation of the data values in the statistical registers.

If you entered data points with x and y values, press

0 y

0 x

to display the

standard deviation of the y values; then press

to display the standard deviation of the x

values.

0 y

(“Population” Deviation)

— Calculates the “n weighted” (or “population”) standard deviation.

0 x

(“Sample” Deviation)

—Calculates the “n - 1 weighted” (or “sample”) standard deviation.

Page 29

Linear Regression

0 {

(Intercept/Slope)

—Enables you to display the y-intercept and slope of the representative line. To display the y-intercept (b), press press

0 d

(Correlation)

0 {

after you display the y-intercept.

; to display the slope (a),

—Calculates the correlation between the x and y values in a set of data points.

0 T, 0 Q

(Predicted Value

enter an x value, you can press

)—After you

0 Q

to display the y value that corresponds with that x on the best straight line through the data points entered. Similarly, after you enter a y value, you can press

0 T

to display the corresponding x

value.

Page 30

Common Keystroke Sequences

Monthly Payment for a Home Mortgage

Purpose: To find the amount of the monthly payment on a mortgage with end-of-month payments (ordinary annuity).

Values You Supply:

mortgage

amount

annual interest

number of

years

rate

in mortgage

Procedure Key

Sequence

Clear calculator and mode

isters; select two decimal

re places.

Press

until

FIN

displayed. Press

not

0 a

displayed.*

until

Begin

Enter mortgage amount. Calculate interest rate. Enter interest rate.

- 0 b 0 c

0 a

mortgage rate

0 h

Calculate number of payment periods.

Enter number of payment periods.

Compute monthly payment. * If payments occur at the beginning of each

month (annuity due), press

Begin

is displayed.

years

C 1 M

0 a

0 i

until

Page 31

Remaining Balance for a Home Mortgage

Purpose: To find the remaining balance—after a selected payment number—of a mortgage with end-of-month payments (ordinary annuity).

Values You Supply:

mortgage

amount

annual interest

number of

amount of

payment

years

payment

number

rate

in mortgage

Procedure Key

Sequence

Clear calculator and mode

isters; select two decimal

re places.

Press

until

FIN

displayed. Press

not

0 a

displayed.*

until

Begin

Enter mortgage amount.

- 0 b 0 c

0 a

mortgage

Calculate interest rate. Enter interest rate.

rate

0 h

Calculate number of payment periods.

years

0 i

Enter number of payment periods.

Enter payment amount.

payment

Enter payment number and calculate balance.*

number

* If payments occur at the beginning of each

month (annuity due), press

Begin

is displayed.

0 a

until

Page 32

Common Keystroke Sequences

(Cont.)

Loan Amount a Buyer Can Afford

Purpose: To find the maximum loan amount and selling price a prospective home buyer can afford, assuming that:

The buyer will pay a given percentage of the selling price as a down payment.

An estimated percentage is added to the monthly payment for taxes and insurance.

The total monthly payment (principal, interest, taxes, and insurance) is not to exceed a predetermined percentage limit of the buyer's gross monthly income.

Values You Supply:

annual interest

number of

buyer's gross monthly

percent limit

percent taxes and Insurance

years

rate

in mortgage

income

(of gross monthly income)

(of total

monthly payment)

percent down

(of selling price)

Procedure Key Sequence

Clear calculator and mode re

isters; select

wo decimal places.

Press

until

FIN

isplayed.

- 0 b 0 c

(continued)

Page 33

Procedure Key Sequence

Press

Begin

0 a

not

until

displayed.*

Enter monthly interest rate.

Calculate and enter number of monthly payments.

Calculate and store maximum monthly payment.

Calculate and enter maximum allowable loan payment (without taxes

r insurance).

0 a

rate

years

0 h I

0 i

income percent limit

l r

percent

taxes and insurance

l 0 \ n s 0 P l M

Compute maximum

llowable loan amount.

Calculate house price (includin

down

payment).

Calculate down payment.

percent

down

E l 0 \ n s K l

o s K l

Page 34

Common Keystroke Sequences

(Cont.)

Selling Price of a House if Seller Pays Points and Commission

Purpose: To find the selling price of a house, assuming that the seller wants to make a certain profit and that the selling price must include points and commission.

Values You Supply:

original price

profit

points

commission

(dollar amount)

(percentage points)

(dollar amount)

(percentage points)

Procedure Key Sequence

Clear calculator and mode re

isters; select

wo decimal places.

Press

until no

- 0 b 0 c

mode indicator is

isplayed.

dd original price and profit to calculate cost before points are added

n, and enter.

original price

profit

Enter points as a margin.

Compute selling price.

points

commission

U 1 S

Page 35

Error Conditions

When an error condition occurs, the word “Error” appears in the display. The calculator will not accept a keyboard entry until you press

(Press

pending operations; press

to clear the error condition.

twice to clear the condition and all

to clear the

calculator completely.)

General Error Conditions

The error conditions listed below can occur in any mode. Errors occur when you:

Calculate a result that is outside the range

-9.999999 x 10

-99

Divide a number by zero.

Calculate

to 9.999999 x 1099.

0 G

0 4

to -1 x 10

0 \

for an old value equal to

, zero, or 1 x

of zero.

zero.

Calculate

0 k, 0 G

, or

0 H

of a

negative number.

Use

0 H

to raise zero to the power of

zero.

Press a key or key sequence that cannot be performed in the current mode.

Financial Error Conditions

In the financial mode, errors occur when you:

Calculate a financial unknown before you have entered enough known variables or when no solution exists.

Page 36

Error Conditions

(Continued)

Financial Error Conditions (Continued)

Use

0 O

0 N

when the number of compounding periods per year is zero or very large, or when %i is small.

Compute the balance or interest for a payment number less than zero.

Statistics Error Conditions

In the statistics mode, errors occur when you:

Use that |x| > 1 x 10

to enter a data point (x or y) such

Press

0 f

when there are less than two

data points in the statistical registers.

Calculate

Perform a statistical calculation when there

0 x

with only one data point.

are no data points.

Perform a linear regression calculation with less than two data points.

Perform a linear regression calculation on a vertical line.

Enter a series of data values such that the sum of their squares exceeds the upper or lower limit of the calculator.

Page 37

In Case of Difficulty

If you have difficulty operating the calculator, you may be able to correct the problem with the solutions suggested in the table below.

Observation Action

Display is blank;

igits do not ppear.

The display durin

a long calculation.

oes blank

Wait for it to finish. Be sure the solar power

cells are exposed to an adequate light source.

function does

not seem to

ork.

Be sure the calculator is set for the correct mode— profit margin, FIN, or STAT.

he number of

ecimal digits

hat you expect

is not displayed.

Be sure the display is set to the correct format— floating decimal or fixed decimal.

n error occurs. Check the error conditions

listed on pa

es 35-36.

If you experience difficulties other than those listed above, press calculator, and then repeat your calculation.

Review the operating instructions to be sure that you are performing the calculation correctly.

to clear the

Page 38

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:

ti-cares@ti.com 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.