Casio FX-9750G Technical document

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.
uu
uu
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.
E
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
P

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.
kk
kk
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.
uu
uu
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.
P
BACK UPBACK UP
MAIN
P
P
1
2

398
uu
uu
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.
kk
kk
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
P
BACK UPBACK UP
MAIN
P
BACK UPBACK UP
MAIN
P
i
P
1
2

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.
• Check cable connection.
• 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
ex
x
x2
1/x
3x
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|
GG
GG
G 90(2n+1):DEG
|x|
GG
GG
G π/2(2n+1):RAD
|x|
GG
GG
G 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
GG
GG
G
0
|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, θ )
°’ ”
←
°’ ”
^(xy)
xy
ab/c
STAT
Internal
digits
15 digits
"
"
"
"
"
Accuracy
As a rule,
accuracy is
±1 at the
10th digit.
"
"
"
"
"
Notes
However, for tan
θ :
| θ |
GG
GG
G 90(2n+1):DEG
| θ |
GG
GG
G π/2(2n+1):RAD
| θ |
GG
GG
G 100(2n+1):GRA
Input ranges
0 <r< 1 ×10100
(DEG) | θ | < 9 ×109°
(RAD) | θ | < 5 ×107πrad
(GRA) | θ | < 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
GG
GG
G 0
–1 ×10100 < logy< 100
y= 0 : x > 0
y< 0 : x = 2n+1,
(n
GG
GG
G 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
x σ n, y σ n, x, y, a,b,c,d,e, r :
n
GG
GG
G 0
x σ n–1, y σ n–1: n
GG
GG
G 0, 1
1
–––––
2n+1
1
––
x
1
––
y
402
1
––
n
1
––
x
Appendix D Input Ranges