Casio FX-9750G Document technique

Appendix

Appendix A Resetting the Calculator

Appendix B Power Supply

Appendix C Error Message Table

Appendix D Input Ranges

Appendix E 2-byte Command Table

Appendix F Specifications

394

Appendix A Resetting the Calculator

Warning!

The procedure described here clears all memory contents. Never perform this op-

eration unless you want to totally clear the memory of the calculator. If you need

the data currently stored in memory, be sure to write it down somewhere before

performing the RESET operation.

uTo reset the calculator

1. Press mto display the main menu.

2. Highlight the MEM icon and press w, or press c.

3. Use cto move the highlighting down to “Reset” and then press w.

4. Press 1(YES) to reset the calculator or 6(NO) to abort the operation without

resetting anything.

5. Press m.

• If the display appears to dark or dim after you reset the calculator, adjust the

contrast.

123456

P.13

395

Resetting the calculator initializes it to the following settings.

Item Initial Setting

Icon RUN

Mode Comp

Angle Unit Rad

Exponent Display Range Norm 1

Variable Memory Clear

Function Memory Clear

Answer Memory (Ans) Clear

Graphic Display/Text Display Clear

Matrix Contents Clear

Equation Calculation Memory Clear

View Window Clear (initialized)

View Window Memory Clear

Graph Function Clear

Graph Memory Clear

Enlargement/Reduction Factor Clear (initialized)

Dynamic Graph Data Clear

Table & Graph Data Clear

Recursion Calculation Memory Clear

List Data Clear

Statistical Calculation/Graph Memory Clear

Program Clear

Input Buffer/AC Replay Clear

• If the calculator stops operating correctly for some

reason, use a thin, pointed object to press the P

button on the back of the calculator. This should

make the RESET screen appear on the display.

Perform the procedure to complete the RESET op-

eration.

• Pressing the P button while an internal calculation is being performed (indi-

cated by a blank display) will cause all data in memory to be deleted.

Resetting the Calculator Appendix A

P button

396

Appendix B Power Supply

This unit is powered by four AAA-size (LR03 (AM4) or R03 (UM-4)) batteries. In

addition, it uses a single CR2032 lithium battery as a back up power supply for the

memory.

If the following message appears on the display, immediately stop using the calcula-

tor and replace batteries.

If you try to continue using the calculator, it will automatically switch power off, in

order to protect memory contents. You will not be able to switch power back on until

you replace batteries.

Be sure to replace the main batteries at least once every two years, no matter how

much you use the calculator during that time.

Warning!

If you remove both the main power supply and the memory back up batteries at the

same time, all memory contents will be erased. If you do remove both batteries,

correctly reload them and then perform the reset operation.

kReplacing Batteries

Precautions:

Incorrectly using batteries can cause them to burst or leak, possibly damaging the

interior of the unit. Note the following precautions:

• Be sure that the positive (+) and negative (–) poles of each battery are facing in

the proper directions.

• Never mix batteries of different types.

• Never mix old batteries and new ones.

• Never leave dead batteries in the battery

compartment.

• Remove the batteries if you do not plan to

use the unit for long periods.

• Never try to recharge the batteries sup-

plied with the unit.

• Do not expose batteries to direct heat, let

them become shorted, or try to take them

apart.

(Should a battery leak, clean out the battery compartment of the unit immedi-

ately, taking care to avoid letting the battery fluid come into direct contact with

your skin.)

397

Power Supply Appendix B

Keep batteries out of the reach of small children. If swallowed, consult with a

physician immediately.

uTo replace the main power supply batteries

* Never remove the main power supply and the memory back up batteries from

the unit at the same time.

* Never replace the main power supply battery compartment cover or switch the

calculator on while the main power supply batteries are removed from the cal-

culator or not loaded correctly. Doing so can cause memory data to be deleted

and malfunction of the calculator. If mishandling of batteries causes such prob-

lems, correctly load batteries and then perform the RESET operation to resume

normal operation.

* Be sure to replace all four batteries with new ones.

1. Press !O to turn the calculator off.

Warning!

* Be sure to switch the unit off before replacing batteries. Replacing batteries

with power on will cause data in memory to be deleted.

2. Making sure that you do not accidently press the okey, slide the case onto the

calculator and then turn the calculator over.

3. Remove the back cover from the calculator by press-

ing it in the direction indicated by arrow 1, and then

sliding it in the direction indicated by arrow 2.

4. Remove the four old batteries.

5. Load a new set of four batteries, making sure that their

positive (+) and negative (–) ends are facing in the

proper directions.

6. Replace the back cover.

7. Turn the calculator front side up and slide off its case.

Next, press oto turn on power.

• Power supplied by memory back up battery while the main power supply batter-

ies are removed for replacement retains memory contents.

• Do not leave the unit without main power supply batteries loaded for long peri-

ods. Doing so can cause deletion of data stored in memory.

• If the figures on the display appear too light and hard to see after you turn on

power, adjust the contrast.

BACK UPBACK UP

MAIN

398

uTo replace the memory back up battery

* Before replacing the memory back up battery, switch on the unit and check to

see if the “Low battery!” message appears on the display. If it does, replace the

main power supply batteries before replacing the back up power supply bat-

tery.

* Never remove the main power supply and the memory back up batteries from

the unit at the same time.

* Be sure to replace the back up power supply battery at least once 2 years,

regardless of how much you use the unit during that time. Failure to do so can

cause data in memory to be deleted.

1. Press !O to turn the calculator off.

Warning!

* Be sure to switch the unit off before replacing batteries. Replacing batteries

with power on will cause data in memory to be deleted.

2. Making sure that you do not accidently press the okey, slide the case onto the

calculator and then turn the calculator over.

3. Remove the back cover from the calculator by press-

ing it in the direction indicated by arrow 1, and then

sliding it in the direction indicated by arrow 2.

4. Remove screw ion the back of the calculator, and

remove the back up battery compartment cover.

5. Remove the old battery.

6. Wipe off the surfaces of a new battery with a soft, dry

cloth. Load it into the calculator so that its positive (+)

side is facing up.

7. Install the memory protection battery cover onto the

calculator and secure it in place with the screw. Next,

replace the back cover.

8. Turn the calculator front side up and slide off its case.

Next, press oto turn on power.

kAbout the Auto Power Off Function

The calculator switches power off automatically if you do not perform any key opera-

tion for about 6 minutes. To restore power, press o.

Appendix B Power Supply

BACK UPBACK UP

MAIN

BACK UPBACK UP

MAIN

399

Meaning

1Calculation formula contains an

error.

2Formula in a program contains

an error.

1Calculation result exceeds

calculation range.

2Calculation is outside the input

range of a function.

3Illogical operation (division by

zero, etc.)

4Poor precision in ∑calculation

results.

5Poor precision in differential

calculation results.

6Poor precision in integration

calculation results.

7Cannot find results of equation

calculations.

1No corresponding Lbl nfor

Goto n.

2No program stored in program

area Prog “file name”.

• Nesting of subroutines by Prog

“file name” exceeds 10 levels.

Message

Syn ERROR

Ma ERROR

Go ERROR

Ne ERROR

Countermeasure

1Use dor eto display the

point where the error was

generated and correct it.

2Use dor eto display the point

where the error was generated

and then correct the program.

1234

Check the input numeric value

and correct it.

When using memories, check

that the numeric values stored

in memories are correct.

5Try using a smaller value for ∆x

(xincrement/decrement).

6Try using a larger value for n

(number of partitions).

7Check the coefficients of the

equation.

1Correctly input a Lbl nto corres-

pond to the Goto n, or delete

the Goto nif not required.

2Store a program in program

area Prog “file name”, or delete

the Prog “file name” if not

required.

• Ensure that Prog “file name” is

not used to return from

subroutines to main routine. If

used, delete any unnecessary

Prog “file name”.

• Trace the subroutine jump

destinations and ensure that no

jumps are made back to the

original program area. Ensure

that returns are made correctly.

Appendix C Error Message Table

Meaning

• Execution of calculations that

exceed the capacity of the stack

for numeric values or stack for

commands.

• Not enough memory to input a

function into function memory.

• Not enough memory to create a

matrix using the specified

dimension.

• Not enough memory to hold

matrix calculation result.

• Not enough memory to store

data in list function.

• Not enough memory to input

coefficient for equation.

• Not enough memory to hold

equation calculation result.

• Not enough memory to hold

function input in the Graph

Mode for graph drawing.

• Not enough memory to hold

function input in the DYNA

Mode for graph drawing.

• Not enough memory to hold

function or recursion input.

• Incorrect argument specification

for a command that requires an

argument.

• Illegal dimension used during

matrix calculations.

• Problem with cable connection

or parameter setting during

program data communications.

• Problem with cable connection

or parameter setting during

data communications.

• Problem with cable connection

or parameter setting during

data communications.

• Memory of receiving unit

became full during program

data communications.

Message

Stk ERROR

Mem ERROR

Arg ERROR

Dim ERROR

Com ERROR

TRANSMIT

ERROR!

RECEIVE

ERROR!

MEMORY FULL!

Countermeasure

• Simplify the formulas to keep

stacks within 10 levels for the

numeric values and 26 levels

for the commands.

• Divide the formula into two or

more parts.

• Keep the number of variables

you use for the operation within

the number of variables

currently available.

• Simplify the data you are trying

to store to keep it within the

available memory capacity.

• Delete no longer needed data

to make room for the new data.

• Correct the argument.

• Lbl n, Goto n: n= integer from

0 through 9.

• Check matrix or list dimension.

• Check cable connection.

• Delete some data stored in the

receiving unit and try again.

400

Appendix C Error Message Table

401

Function

sinx

cosx

tanx

sin–1x

cos–1x

tan–1x

sinhx

coshx

tanhx

sinh–1x

cosh–1x

tanh–1x

logx

Inx

10x

1/x

nPr

nCr

Pol (x, y)

Internal

digits

15 digits

Accuracy

As a rule,

accuracy is

±1 at the

10th digit.

Notes

However, for tanx:

|x|

90(2n+1):DEG

|x|

π/2(2n+1):RAD

|x|

100(2n+1):GRA

For sinh and tanh, when

x= 0, errors are cumula-

tive and accuracy is af-

fected at a certain point.

Input ranges

(DEG) |x| < 9 ×109°

(RAD) |x| < 5 ×107πrad

(GRA) |x| < 1 ×1010grad

|x| <1

|x| < 1 ×10100

|x| <230.2585092

|x| < 1 ×10100

|x| < 5 ×1099

1<x< 5 ×1099

|x| < 1

1 ×10–99 <x< 1 ×10100

–1 ×10100 < x< 100

–1 ×10100

< x<230.2585092

0 <x< 1 ×10100

|x| <1 ×1050

|x| < 1 ×10100, x

|x| < 1 ×10100

0 <x<69

(xis an integer)

Result < 1 ×10100

n, r(nand rare integers)

0 <r<n,

n< 1 ×1010

< 1 ×10100

x2+ y2

Appendix D Input Ranges

Function

Rec

(r,

)

°’ ”

←

°’ ”

^(xy)

ab/c

STAT

Internal

digits

15 digits

Accuracy

As a rule,

accuracy is

±1 at the

10th digit.

Notes

However, for tan

90(2n+1):DEG

π/2(2n+1):RAD

100(2n+1):GRA

Input ranges

0 <r< 1 ×10100

(DEG) |

| < 9 ×109°

(RAD) |

| < 5 ×107πrad

(GRA) |

| < 1 ×1010grad

|a|, b, c< 1 ×10100

0 <b, c

|x| < 1 ×10100

Sexagesimal display:

|x| <1 ×107

x> 0:

–1 ×10100 < ylogx< 100

x= 0 : y > 0

x< 0 :

y=n, (nis an integer)

However;

–1 ×10100 < log |x| < 100

y> 0 : x

–1 ×10100 < logy< 100

y= 0 : x > 0

y< 0 : x = 2n+1,

0, nis an integer)

However;

–1 ×10100 < log |y| < 100

• Results

Total of integer, numerator

and denominator must be

within 10 digits (includes di-

vision marks).

• Input

Result displayed as a frac-

tion for integer when integer,

numerator and denominator

are less than 1 ×1010.

|x| < 1 ×1050

|y| < 1 ×1050

|n| < 1 ×10100

n, y

n, x, y, a,b,c,d,e, r :

n–1, y

n–1: n

0, 1

–––––

2n+1

––

402

––

Appendix D Input Ranges

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