Casio CFX-9970G Technical document

Appendix
Appendix A Resetting the Calculator
Appendix B Power Supply
Appendix C Error Message Table
Appendix D Input Ranges
Appendix E Specifications

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Appendix A Resetting the Calculator
Warning!
The procedure described here clears all memory contents. Never perform this
operation 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
F
1. Highlight the SYS icon on the main menu and then press w, or press t.
2. Use cto move the highlighting down to “Reset” and then press w.
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3. Press 1(YES) to reset the calculator or 6(NO) to abort the operation
without resetting anything.
4. Press m.
P.11 • If the display appears to dark or dim after you reset the calculator, adjust the tint.

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• If the calculator stops operating correctly for some P button
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
operation.
• Pressing the P button while an internal calculation is being performed will
cause all data in memory to be deleted.
Resetting the Calculator Appendix A
PP

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Appendix B Power Supply
This unit is powered by fourAAA-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
calculator and replace batteries.
If you try to continue using the calculator, it will automatically turn power off, in
order to protect memory contents. You will not be able to turn 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
supplied 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.)

447
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 turn the calculator on while the main power supply batteries are
removed from the calculator or not loaded correctly. Doing so can cause
memory data to be deleted and malfunction of the calculator. If mishandling
of batteries causes such problems, 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 turn 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. Slide the back cover from the unit by pulling with your
finger at the point marked 1.
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.
P
BACK UPBACK UP
MAINMAIN
P
MAIMAI
1

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P
BACK UPBACK UP
MAINMAIN
ij
P
MAIMAI
1
Appendix B Power Supply
• Power supplied by memory back up battery while the main power supply
batteries are removed for replacement retains memory contents.
• Do not leave the unit without main power supply batteries loaded for long
periods. 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 tint.
uu
uu
uTo replace the memory back up battery
* Before replacing the memory back up battery, turn 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
battery.
* 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 turn 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. Slide the back cover from the unit by pulling with your
finger at the point marked 1.
4. Remove screw ion the back of the calculator, and
remove the back up battery compartment cover.
5. Insert a thin, pointed non-metal object (such as a
tooth pick) into the hole marked jand remove the
old battery.

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P
BACK UPBACK UP
MAINMAIN
Power Supply Appendix B
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 turns power off automatically if you do not perform any key
operation for about 6 minutes. To restore power, press o.

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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.
8Attempt to use approx with an
expression that generates an
error unique to the ALGBR Mode.
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.
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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 Ax
(xincrement/decrement).
6Try changing the tolerance “tol”
when using Gauss-Kronrod Rule
or the number of divisions “n”
when using Simpson's Rule to
another value.
7Check the coefficients of the
equation.
8Change the input expression.
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 subrou-
tines 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 or list 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.
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Error Message Table Appendix C

Meaning
• No solution exists for the
operation being performed in
the ALGBR Mode.
• The result of the operation
being performed in the ALGBR
Mode exceeds the range of the
calculator.
• An input value in the ALGBR
Mode is outside the domain of
the operation being performed.
• In the ALGBR Mode, only real
numbers have been input and
the result is a complex number
while the set up screen's
Answer Type item is specified
as "Real".
• No solution can be obtained in
the ALGBR Mode using the
Solve function.
Countermeasure
• Change the input expression.
• Change the input expression.
• Change the input expression.
1Change the setting of Answer
Type to "Cplx".
2Change the input expression.
1Change the setting of Answer
Type to "Cplx".
2Change the input expression.
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Message
Undefined
Overflow ERROR
Domain ERROR
Non-Real
ERROR
No Solution
Appendix C Error Message Table